AUTH-2021 - s3 bucket uploading for SSH logs

.gitignore

@@ -9,4 +9,5 @@ guide/public
 \#*\#
 cscope.*
 cloudflared
-!cmd/cloudflared/
+!cmd/cloudflared/
+.DS_Store

Gopkg.lock

@@ -17,6 +17,51 @@
   pruneopts = "UT"
   revision = "648efa622239a2f6ff949fed78ee37b48d499ba4"
 
+[[projects]]
+  digest = "1:4a296b8f487dab7ea37c4558d6e84be8103eb6bd297202e870266ff99ebd769d"
+  name = "github.com/aws/aws-sdk-go"
+  packages = [
+    "aws",
+    "aws/awserr",
+    "aws/awsutil",
+    "aws/client",
+    "aws/client/metadata",
+    "aws/corehandlers",
+    "aws/credentials",
+    "aws/credentials/ec2rolecreds",
+    "aws/credentials/endpointcreds",
+    "aws/credentials/processcreds",
+    "aws/credentials/stscreds",
+    "aws/csm",
+    "aws/defaults",
+    "aws/ec2metadata",
+    "aws/endpoints",
+    "aws/request",
+    "aws/session",
+    "aws/signer/v4",
+    "internal/ini",
+    "internal/s3err",
+    "internal/sdkio",
+    "internal/sdkrand",
+    "internal/sdkuri",
+    "internal/shareddefaults",
+    "private/protocol",
+    "private/protocol/eventstream",
+    "private/protocol/eventstream/eventstreamapi",
+    "private/protocol/json/jsonutil",
+    "private/protocol/query",
+    "private/protocol/query/queryutil",
+    "private/protocol/rest",
+    "private/protocol/restxml",
+    "private/protocol/xml/xmlutil",
+    "service/s3",
+    "service/sts",
+    "service/sts/stsiface",
+  ]
+  pruneopts = "UT"
+  revision = "2eb9a651f22769d792f974e8a8efe16afea3370f"
+  version = "v1.23.9"
+
 [[projects]]
   digest = "1:d6afaeed1502aa28e80a4ed0981d570ad91b2579193404256ce672ed0a609e0d"
   name = "github.com/beorn7/perks"
@@ -218,6 +263,24 @@
   pruneopts = "UT"
   revision = "8e809c8a86450a29b90dcc9efbf062d0fe6d9746"
 
+[[projects]]
+  digest = "1:bb81097a5b62634f3e9fec1014657855610c82d19b9a40c17612e32651e35dca"
+  name = "github.com/jmespath/go-jmespath"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "c2b33e84"
+
+[[projects]]
+  digest = "1:6c41d4f998a03b6604227ccad36edaed6126c397e5d78709ef4814a1145a6757"
+  name = "github.com/jmoiron/sqlx"
+  packages = [
+    ".",
+    "reflectx",
+  ]
+  pruneopts = "UT"
+  revision = "d161d7a76b5661016ad0b085869f77fd410f3e6a"
+  version = "v1.2.0"
+
 [[projects]]
   digest = "1:31e761d97c76151dde79e9d28964a812c46efc5baee4085b86f68f0c654450de"
   name = "github.com/konsorten/go-windows-terminal-sequences"
@@ -579,6 +642,11 @@
   analyzer-name = "dep"
   analyzer-version = 1
   input-imports = [
+    "github.com/DATA-DOG/go-sqlmock",
+    "github.com/aws/aws-sdk-go/aws",
+    "github.com/aws/aws-sdk-go/aws/credentials",
+    "github.com/aws/aws-sdk-go/aws/session",
+    "github.com/aws/aws-sdk-go/service/s3",
     "github.com/cloudflare/brotli-go",
     "github.com/cloudflare/golibs/lrucache",
     "github.com/coredns/coredns/core/dnsserver",

Gopkg.toml

@@ -97,3 +97,7 @@
 [[constraint]]
   name = "github.com/creack/pty"
   version = "1.1.7"
+
+[[constraint]]
+  name = "github.com/aws/aws-sdk-go"
+  version = "1.23.9"

awsuploader/directory_upload_manager.go

@@ -0,0 +1,106 @@
+package awsuploader
+
+import (
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/sirupsen/logrus"
+)
+
+// DirectoryUploadManager is used to manage file uploads on an interval from a directory
+type DirectoryUploadManager struct {
+	logger        *logrus.Logger
+	uploader      Uploader
+	rootDirectory string
+	sweepInterval time.Duration
+	ticker        *time.Ticker
+	shutdownC     chan struct{}
+	workQueue     chan string
+}
+
+// NewDirectoryUploadManager create a new DirectoryUploadManager
+// uploader is an Uploader to use as an actual uploading engine
+// directory is the directory to sweep for files to upload
+// sweepInterval is how often to iterate the directory and upload the files within
+func NewDirectoryUploadManager(logger *logrus.Logger, uploader Uploader, directory string, sweepInterval time.Duration, shutdownC chan struct{}) *DirectoryUploadManager {
+	workerCount := 10
+	manager := &DirectoryUploadManager{
+		logger:        logger,
+		uploader:      uploader,
+		rootDirectory: directory,
+		sweepInterval: sweepInterval,
+		shutdownC:     shutdownC,
+		workQueue:     make(chan string, workerCount),
+	}
+
+	//start workers
+	for i := 0; i < workerCount; i++ {
+		go manager.worker()
+	}
+
+	return manager
+}
+
+// Upload a file using the uploader
+// This is useful for "out of band" uploads that need to be triggered immediately instead of waiting for the sweep
+func (m *DirectoryUploadManager) Upload(filepath string) error {
+	return m.uploader.Upload(filepath)
+}
+
+// Start the upload ticker to walk the directories
+func (m *DirectoryUploadManager) Start() {
+	m.ticker = time.NewTicker(m.sweepInterval)
+	go m.run()
+}
+
+func (m *DirectoryUploadManager) run() {
+	for {
+		select {
+		case <-m.shutdownC:
+			m.ticker.Stop()
+			return
+		case <-m.ticker.C:
+			m.sweep()
+		}
+	}
+}
+
+// sweep the directory and kick off uploads
+func (m *DirectoryUploadManager) sweep() {
+	filepath.Walk(m.rootDirectory, func(path string, info os.FileInfo, err error) error {
+		if info.IsDir() {
+			return nil
+		}
+		//30 days ago
+		retentionTime := 30 * (time.Hour * 24)
+		checkTime := time.Now().Add(-time.Duration(retentionTime))
+
+		//delete the file it is stale
+		if info.ModTime().After(checkTime) {
+			os.Remove(path)
+			return nil
+		}
+		//add the upload to the work queue
+		go func() {
+			m.workQueue <- path
+		}()
+		return nil
+	})
+}
+
+// worker handles upload requests
+func (m *DirectoryUploadManager) worker() {
+	for {
+		select {
+		case <-m.shutdownC:
+			return
+		case filepath := <-m.workQueue:
+			if err := m.Upload(filepath); err != nil {
+				m.logger.WithError(err).Error("Cannot upload file to s3 bucket")
+			} else {
+				os.Remove(filepath)
+			}
+		}
+	}
+}

awsuploader/directory_upload_manager_test.go

@@ -0,0 +1,137 @@
+package awsuploader
+
+import (
+	"errors"
+	"io/ioutil"
+	"math/rand"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/sirupsen/logrus"
+)
+
+type MockUploader struct {
+	shouldFail bool
+}
+
+func (m *MockUploader) Upload(filepath string) error {
+	if m.shouldFail {
+		return errors.New("upload set to fail")
+	}
+	return nil
+}
+
+func NewMockUploader(shouldFail bool) Uploader {
+	return &MockUploader{shouldFail: shouldFail}
+}
+
+func getDirectoryPath(t *testing.T) string {
+	dir, err := os.Getwd()
+	if err != nil {
+		t.Fatal("couldn't create the test directory!", err)
+	}
+	return filepath.Join(dir, "uploads")
+}
+
+func setupTestDirectory(t *testing.T) string {
+	path := getDirectoryPath(t)
+	os.RemoveAll(path)
+	time.Sleep(100 * time.Millisecond) //short way to wait for the OS to delete the folder
+	err := os.MkdirAll(path, os.ModePerm)
+	if err != nil {
+		t.Fatal("couldn't create the test directory!", err)
+	}
+	return path
+}
+
+func createUploadManager(t *testing.T, shouldFailUpload bool) *DirectoryUploadManager {
+	rootDirectory := setupTestDirectory(t)
+	uploader := NewMockUploader(shouldFailUpload)
+	logger := logrus.New()
+	shutdownC := make(chan struct{})
+	return NewDirectoryUploadManager(logger, uploader, rootDirectory, 1*time.Second, shutdownC)
+}
+
+func createFile(t *testing.T, fileName string) (*os.File, string) {
+	path := filepath.Join(getDirectoryPath(t), fileName)
+	f, err := os.Create(path)
+	if err != nil {
+		t.Fatal("upload to create file for sweep test", err)
+	}
+	return f, path
+}
+
+func TestUploadSuccess(t *testing.T) {
+	manager := createUploadManager(t, false)
+	path := filepath.Join(getDirectoryPath(t), "test_file")
+	if err := manager.Upload(path); err != nil {
+		t.Fatal("the upload request method failed", err)
+	}
+}
+
+func TestUploadFailure(t *testing.T) {
+	manager := createUploadManager(t, true)
+	path := filepath.Join(getDirectoryPath(t), "test_file")
+	if err := manager.Upload(path); err == nil {
+		t.Fatal("the upload request method should have failed and didn't", err)
+	}
+}
+
+func TestSweepSuccess(t *testing.T) {
+	manager := createUploadManager(t, false)
+	f, path := createFile(t, "test_file")
+	defer f.Close()
+
+	manager.Start()
+	time.Sleep(2 * time.Second)
+	if _, err := os.Stat(path); os.IsExist(err) {
+		//the file should have been deleted
+		t.Fatal("the manager failed to delete the file", err)
+	}
+}
+
+func TestSweepFailure(t *testing.T) {
+	manager := createUploadManager(t, true)
+	f, path := createFile(t, "test_file")
+	defer f.Close()
+
+	manager.Start()
+	time.Sleep(2 * time.Second)
+	_, serr := f.Stat()
+	if serr != nil {
+		//the file should still exist
+		os.Remove(path)
+		t.Fatal("the manager failed to delete the file", serr)
+	}
+}
+
+func TestHighLoad(t *testing.T) {
+	manager := createUploadManager(t, false)
+	for i := 0; i < 30; i++ {
+		f, _ := createFile(t, randomString(6))
+		defer f.Close()
+	}
+	manager.Start()
+	time.Sleep(4 * time.Second)
+
+	directory := getDirectoryPath(t)
+	files, err := ioutil.ReadDir(directory)
+	if err != nil || len(files) > 0 {
+		t.Fatalf("the manager failed to upload all the files: %s files left: %d", err, len(files))
+	}
+}
+
+// LowerCase [a-z]
+const randSet = "abcdefghijklmnopqrstuvwxyz"
+
+// String returns a string of length 'n' from a set of letters 'lset'
+func randomString(n int) string {
+	b := make([]byte, n)
+	lsetLen := len(randSet)
+	for i := range b {
+		b[i] = randSet[rand.Intn(lsetLen)]
+	}
+	return string(b)
+}

awsuploader/file_uploader.go

@@ -0,0 +1,62 @@
+package awsuploader
+
+import (
+	"context"
+	"os"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/s3"
+)
+
+//FileUploader aws compliant bucket upload
+type FileUploader struct {
+	storage    *s3.S3
+	bucketName string
+	clientID   string
+	secretID   string
+}
+
+// NewFileUploader creates a new S3 compliant bucket uploader
+func NewFileUploader(bucketName, region, accessKeyID, secretID, token, s3Host string) (*FileUploader, error) {
+	sess, err := session.NewSession(&aws.Config{
+		Region:      aws.String(region),
+		Credentials: credentials.NewStaticCredentials(accessKeyID, secretID, token),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	var storage *s3.S3
+	if s3Host != "" {
+		storage = s3.New(sess, &aws.Config{Endpoint: aws.String(s3Host)})
+	} else {
+		storage = s3.New(sess)
+	}
+
+	return &FileUploader{
+		storage:    storage,
+		bucketName: bucketName,
+	}, nil
+}
+
+// Upload a file to the bucket
+func (u *FileUploader) Upload(filepath string) error {
+	info, err := os.Stat(filepath)
+	if err != nil {
+		return err
+	}
+	file, err := os.Open(filepath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	_, serr := u.storage.PutObjectWithContext(context.Background(), &s3.PutObjectInput{
+		Bucket: aws.String(u.bucketName),
+		Key:    aws.String(info.Name()),
+		Body:   file,
+	})
+	return serr
+}

awsuploader/upload_manager.go

@@ -0,0 +1,7 @@
+package awsuploader
+
+// UploadManager is used to manage file uploads on an interval
+type UploadManager interface {
+	Upload(string) error
+	Start()
+}

awsuploader/uploader.go

@@ -0,0 +1,7 @@
+package awsuploader
+
+// Uploader the functions required to upload to a bucket
+type Uploader interface {
+	//Upload a file to the bucket
+	Upload(string) error
+}

cmd/cloudflared/tunnel/cmd.go

@@ -13,6 +13,7 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/cloudflare/cloudflared/awsuploader"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
@@ -41,10 +42,12 @@ import (
 )
 
 const (
-	sentryDSN          = "https://56a9c9fa5c364ab28f34b14f35ea0f1b:3e8827f6f9f740738eb11138f7bebb68@sentry.io/189878"
+	sentryDSN = "https://56a9c9fa5c364ab28f34b14f35ea0f1b:3e8827f6f9f740738eb11138f7bebb68@sentry.io/189878"
+
+	sshLogFileDirectory = "/var/log/cloudflared/"
 
 	// sshPortFlag is the port on localhost the cloudflared ssh server will run on
-	sshPortFlag        = "local-ssh-port"
+	sshPortFlag = "local-ssh-port"
 
 	// shortLivedCertFlag enables short lived cert authentication
 	shortLivedCertFlag = "short-lived-certs"
@@ -53,7 +56,25 @@ const (
 	sshIdleTimeoutFlag = "ssh-idle-timeout"
 
 	// sshMaxTimeoutFlag defines the max duration a SSH session can remain open for
-	sshMaxTimeoutFlag  = "ssh-max-timeout"
+	sshMaxTimeoutFlag = "ssh-max-timeout"
+
+	// bucketNameFlag is the bucket name to use for the SSH log uploader
+	bucketNameFlag = "bucket-name"
+
+	// regionNameFlag is the AWS region name to use for the SSH log uploader
+	regionNameFlag = "region-name"
+
+	// secretIDFlag is the Secret id of SSH log uploader
+	secretIDFlag = "secret-id"
+
+	// accessKeyIDFlag is the Access key id of SSH log uploader
+	accessKeyIDFlag = "access-key-id"
+
+	// sessionTokenIDFlag is the Session token of SSH log uploader
+	sessionTokenIDFlag = "session-token"
+
+	// s3URLFlag is the S3 URL of SSH log uploader (e.g. don't use AWS s3 and use google storage bucket instead)
+	s3URLFlag = "s3-url-host"
 )
 
 var (
@@ -351,8 +372,23 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 
 		logger.Infof("ssh-server set")
 
+		if c.IsSet(bucketNameFlag) && c.IsSet(regionNameFlag) && c.IsSet(accessKeyIDFlag) && c.IsSet(secretIDFlag) {
+			uploader, err := awsuploader.NewFileUploader(c.String(bucketNameFlag), c.String(regionNameFlag),
+				c.String(accessKeyIDFlag), c.String(secretIDFlag), c.String(sessionTokenIDFlag), c.String(s3URLFlag))
+			if err != nil {
+				logger.WithError(err).Error("Cannot create uploader for SSH Server")
+				return errors.Wrap(err, "Cannot create uploader for SSH Server")
+			}
+
+			os.Mkdir(sshLogFileDirectory, 0600)
+
+			uploadManager := awsuploader.NewDirectoryUploadManager(logger, uploader, sshLogFileDirectory, 30*time.Minute, shutdownC)
+			uploadManager.Start()
+		}
+
 		sshServerAddress := "127.0.0.1:" + c.String(sshPortFlag)
 		server, err := sshserver.New(logger, sshServerAddress, shutdownC, c.Bool(shortLivedCertFlag), c.Duration(sshIdleTimeoutFlag), c.Duration(sshMaxTimeoutFlag))
+
 		if err != nil {
 			logger.WithError(err).Error("Cannot create new SSH Server")
 			return errors.Wrap(err, "Cannot create new SSH Server")
@@ -947,5 +983,41 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"SSH_MAX_TIMEOUT"},
 			Hidden:  true,
 		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    bucketNameFlag,
+			Usage:   "Bucket name of where to upload SSH logs",
+			EnvVars: []string{"BUCKET_ID"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    regionNameFlag,
+			Usage:   "Region name of where to upload SSH logs",
+			EnvVars: []string{"REGION_ID"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    accessKeyIDFlag,
+			Usage:   "Access Key ID of where to upload SSH logs",
+			EnvVars: []string{"ACCESS_CLIENT_ID"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    secretIDFlag,
+			Usage:   "Secret ID of where to upload SSH logs",
+			EnvVars: []string{"SECRET_ID"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    sessionTokenIDFlag,
+			Usage:   "Session Token to use in the configuration of SSH logs uploading",
+			EnvVars: []string{"SESSION_TOKEN_ID"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    s3URLFlag,
+			Usage:   "S3 url of where to upload SSH logs",
+			EnvVars: []string{"S3_URL"},
+			Hidden:  true,
+		}),
 	}
 }

vendor/github.com/aws/aws-sdk-go/LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/aws/aws-sdk-go/NOTICE.txt

@@ -0,0 +1,3 @@
+AWS SDK for Go
+Copyright 2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+Copyright 2014-2015 Stripe, Inc.

vendor/github.com/aws/aws-sdk-go/aws/awserr/error.go

@@ -0,0 +1,164 @@
+// Package awserr represents API error interface accessors for the SDK.
+package awserr
+
+// An Error wraps lower level errors with code, message and an original error.
+// The underlying concrete error type may also satisfy other interfaces which
+// can be to used to obtain more specific information about the error.
+//
+// Calling Error() or String() will always include the full information about
+// an error based on its underlying type.
+//
+// Example:
+//
+//     output, err := s3manage.Upload(svc, input, opts)
+//     if err != nil {
+//         if awsErr, ok := err.(awserr.Error); ok {
+//             // Get error details
+//             log.Println("Error:", awsErr.Code(), awsErr.Message())
+//
+//             // Prints out full error message, including original error if there was one.
+//             log.Println("Error:", awsErr.Error())
+//
+//             // Get original error
+//             if origErr := awsErr.OrigErr(); origErr != nil {
+//                 // operate on original error.
+//             }
+//         } else {
+//             fmt.Println(err.Error())
+//         }
+//     }
+//
+type Error interface {
+	// Satisfy the generic error interface.
+	error
+
+	// Returns the short phrase depicting the classification of the error.
+	Code() string
+
+	// Returns the error details message.
+	Message() string
+
+	// Returns the original error if one was set.  Nil is returned if not set.
+	OrigErr() error
+}
+
+// BatchError is a batch of errors which also wraps lower level errors with
+// code, message, and original errors. Calling Error() will include all errors
+// that occurred in the batch.
+//
+// Deprecated: Replaced with BatchedErrors. Only defined for backwards
+// compatibility.
+type BatchError interface {
+	// Satisfy the generic error interface.
+	error
+
+	// Returns the short phrase depicting the classification of the error.
+	Code() string
+
+	// Returns the error details message.
+	Message() string
+
+	// Returns the original error if one was set.  Nil is returned if not set.
+	OrigErrs() []error
+}
+
+// BatchedErrors is a batch of errors which also wraps lower level errors with
+// code, message, and original errors. Calling Error() will include all errors
+// that occurred in the batch.
+//
+// Replaces BatchError
+type BatchedErrors interface {
+	// Satisfy the base Error interface.
+	Error
+
+	// Returns the original error if one was set.  Nil is returned if not set.
+	OrigErrs() []error
+}
+
+// New returns an Error object described by the code, message, and origErr.
+//
+// If origErr satisfies the Error interface it will not be wrapped within a new
+// Error object and will instead be returned.
+func New(code, message string, origErr error) Error {
+	var errs []error
+	if origErr != nil {
+		errs = append(errs, origErr)
+	}
+	return newBaseError(code, message, errs)
+}
+
+// NewBatchError returns an BatchedErrors with a collection of errors as an
+// array of errors.
+func NewBatchError(code, message string, errs []error) BatchedErrors {
+	return newBaseError(code, message, errs)
+}
+
+// A RequestFailure is an interface to extract request failure information from
+// an Error such as the request ID of the failed request returned by a service.
+// RequestFailures may not always have a requestID value if the request failed
+// prior to reaching the service such as a connection error.
+//
+// Example:
+//
+//     output, err := s3manage.Upload(svc, input, opts)
+//     if err != nil {
+//         if reqerr, ok := err.(RequestFailure); ok {
+//             log.Println("Request failed", reqerr.Code(), reqerr.Message(), reqerr.RequestID())
+//         } else {
+//             log.Println("Error:", err.Error())
+//         }
+//     }
+//
+// Combined with awserr.Error:
+//
+//    output, err := s3manage.Upload(svc, input, opts)
+//    if err != nil {
+//        if awsErr, ok := err.(awserr.Error); ok {
+//            // Generic AWS Error with Code, Message, and original error (if any)
+//            fmt.Println(awsErr.Code(), awsErr.Message(), awsErr.OrigErr())
+//
+//            if reqErr, ok := err.(awserr.RequestFailure); ok {
+//                // A service error occurred
+//                fmt.Println(reqErr.StatusCode(), reqErr.RequestID())
+//            }
+//        } else {
+//            fmt.Println(err.Error())
+//        }
+//    }
+//
+type RequestFailure interface {
+	Error
+
+	// The status code of the HTTP response.
+	StatusCode() int
+
+	// The request ID returned by the service for a request failure. This will
+	// be empty if no request ID is available such as the request failed due
+	// to a connection error.
+	RequestID() string
+}
+
+// NewRequestFailure returns a wrapped error with additional information for
+// request status code, and service requestID.
+//
+// Should be used to wrap all request which involve service requests. Even if
+// the request failed without a service response, but had an HTTP status code
+// that may be meaningful.
+func NewRequestFailure(err Error, statusCode int, reqID string) RequestFailure {
+	return newRequestError(err, statusCode, reqID)
+}
+
+// UnmarshalError provides the interface for the SDK failing to unmarshal data.
+type UnmarshalError interface {
+	awsError
+	Bytes() []byte
+}
+
+// NewUnmarshalError returns an initialized UnmarshalError error wrapper adding
+// the bytes that fail to unmarshal to the error.
+func NewUnmarshalError(err error, msg string, bytes []byte) UnmarshalError {
+	return &unmarshalError{
+		awsError: New("UnmarshalError", msg, err),
+		bytes:    bytes,
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/awserr/types.go

@@ -0,0 +1,221 @@
+package awserr
+
+import (
+	"encoding/hex"
+	"fmt"
+)
+
+// SprintError returns a string of the formatted error code.
+//
+// Both extra and origErr are optional.  If they are included their lines
+// will be added, but if they are not included their lines will be ignored.
+func SprintError(code, message, extra string, origErr error) string {
+	msg := fmt.Sprintf("%s: %s", code, message)
+	if extra != "" {
+		msg = fmt.Sprintf("%s\n\t%s", msg, extra)
+	}
+	if origErr != nil {
+		msg = fmt.Sprintf("%s\ncaused by: %s", msg, origErr.Error())
+	}
+	return msg
+}
+
+// A baseError wraps the code and message which defines an error. It also
+// can be used to wrap an original error object.
+//
+// Should be used as the root for errors satisfying the awserr.Error. Also
+// for any error which does not fit into a specific error wrapper type.
+type baseError struct {
+	// Classification of error
+	code string
+
+	// Detailed information about error
+	message string
+
+	// Optional original error this error is based off of. Allows building
+	// chained errors.
+	errs []error
+}
+
+// newBaseError returns an error object for the code, message, and errors.
+//
+// code is a short no whitespace phrase depicting the classification of
+// the error that is being created.
+//
+// message is the free flow string containing detailed information about the
+// error.
+//
+// origErrs is the error objects which will be nested under the new errors to
+// be returned.
+func newBaseError(code, message string, origErrs []error) *baseError {
+	b := &baseError{
+		code:    code,
+		message: message,
+		errs:    origErrs,
+	}
+
+	return b
+}
+
+// Error returns the string representation of the error.
+//
+// See ErrorWithExtra for formatting.
+//
+// Satisfies the error interface.
+func (b baseError) Error() string {
+	size := len(b.errs)
+	if size > 0 {
+		return SprintError(b.code, b.message, "", errorList(b.errs))
+	}
+
+	return SprintError(b.code, b.message, "", nil)
+}
+
+// String returns the string representation of the error.
+// Alias for Error to satisfy the stringer interface.
+func (b baseError) String() string {
+	return b.Error()
+}
+
+// Code returns the short phrase depicting the classification of the error.
+func (b baseError) Code() string {
+	return b.code
+}
+
+// Message returns the error details message.
+func (b baseError) Message() string {
+	return b.message
+}
+
+// OrigErr returns the original error if one was set. Nil is returned if no
+// error was set. This only returns the first element in the list. If the full
+// list is needed, use BatchedErrors.
+func (b baseError) OrigErr() error {
+	switch len(b.errs) {
+	case 0:
+		return nil
+	case 1:
+		return b.errs[0]
+	default:
+		if err, ok := b.errs[0].(Error); ok {
+			return NewBatchError(err.Code(), err.Message(), b.errs[1:])
+		}
+		return NewBatchError("BatchedErrors",
+			"multiple errors occurred", b.errs)
+	}
+}
+
+// OrigErrs returns the original errors if one was set. An empty slice is
+// returned if no error was set.
+func (b baseError) OrigErrs() []error {
+	return b.errs
+}
+
+// So that the Error interface type can be included as an anonymous field
+// in the requestError struct and not conflict with the error.Error() method.
+type awsError Error
+
+// A requestError wraps a request or service error.
+//
+// Composed of baseError for code, message, and original error.
+type requestError struct {
+	awsError
+	statusCode int
+	requestID  string
+	bytes      []byte
+}
+
+// newRequestError returns a wrapped error with additional information for
+// request status code, and service requestID.
+//
+// Should be used to wrap all request which involve service requests. Even if
+// the request failed without a service response, but had an HTTP status code
+// that may be meaningful.
+//
+// Also wraps original errors via the baseError.
+func newRequestError(err Error, statusCode int, requestID string) *requestError {
+	return &requestError{
+		awsError:   err,
+		statusCode: statusCode,
+		requestID:  requestID,
+	}
+}
+
+// Error returns the string representation of the error.
+// Satisfies the error interface.
+func (r requestError) Error() string {
+	extra := fmt.Sprintf("status code: %d, request id: %s",
+		r.statusCode, r.requestID)
+	return SprintError(r.Code(), r.Message(), extra, r.OrigErr())
+}
+
+// String returns the string representation of the error.
+// Alias for Error to satisfy the stringer interface.
+func (r requestError) String() string {
+	return r.Error()
+}
+
+// StatusCode returns the wrapped status code for the error
+func (r requestError) StatusCode() int {
+	return r.statusCode
+}
+
+// RequestID returns the wrapped requestID
+func (r requestError) RequestID() string {
+	return r.requestID
+}
+
+// OrigErrs returns the original errors if one was set. An empty slice is
+// returned if no error was set.
+func (r requestError) OrigErrs() []error {
+	if b, ok := r.awsError.(BatchedErrors); ok {
+		return b.OrigErrs()
+	}
+	return []error{r.OrigErr()}
+}
+
+type unmarshalError struct {
+	awsError
+	bytes []byte
+}
+
+// Error returns the string representation of the error.
+// Satisfies the error interface.
+func (e unmarshalError) Error() string {
+	extra := hex.Dump(e.bytes)
+	return SprintError(e.Code(), e.Message(), extra, e.OrigErr())
+}
+
+// String returns the string representation of the error.
+// Alias for Error to satisfy the stringer interface.
+func (e unmarshalError) String() string {
+	return e.Error()
+}
+
+// Bytes returns the bytes that failed to unmarshal.
+func (e unmarshalError) Bytes() []byte {
+	return e.bytes
+}
+
+// An error list that satisfies the golang interface
+type errorList []error
+
+// Error returns the string representation of the error.
+//
+// Satisfies the error interface.
+func (e errorList) Error() string {
+	msg := ""
+	// How do we want to handle the array size being zero
+	if size := len(e); size > 0 {
+		for i := 0; i < size; i++ {
+			msg += e[i].Error()
+			// We check the next index to see if it is within the slice.
+			// If it is, then we append a newline. We do this, because unit tests
+			// could be broken with the additional '\n'
+			if i+1 < size {
+				msg += "\n"
+			}
+		}
+	}
+	return msg
+}

vendor/github.com/aws/aws-sdk-go/aws/awsutil/copy.go

@@ -0,0 +1,108 @@
+package awsutil
+
+import (
+	"io"
+	"reflect"
+	"time"
+)
+
+// Copy deeply copies a src structure to dst. Useful for copying request and
+// response structures.
+//
+// Can copy between structs of different type, but will only copy fields which
+// are assignable, and exist in both structs. Fields which are not assignable,
+// or do not exist in both structs are ignored.
+func Copy(dst, src interface{}) {
+	dstval := reflect.ValueOf(dst)
+	if !dstval.IsValid() {
+		panic("Copy dst cannot be nil")
+	}
+
+	rcopy(dstval, reflect.ValueOf(src), true)
+}
+
+// CopyOf returns a copy of src while also allocating the memory for dst.
+// src must be a pointer type or this operation will fail.
+func CopyOf(src interface{}) (dst interface{}) {
+	dsti := reflect.New(reflect.TypeOf(src).Elem())
+	dst = dsti.Interface()
+	rcopy(dsti, reflect.ValueOf(src), true)
+	return
+}
+
+// rcopy performs a recursive copy of values from the source to destination.
+//
+// root is used to skip certain aspects of the copy which are not valid
+// for the root node of a object.
+func rcopy(dst, src reflect.Value, root bool) {
+	if !src.IsValid() {
+		return
+	}
+
+	switch src.Kind() {
+	case reflect.Ptr:
+		if _, ok := src.Interface().(io.Reader); ok {
+			if dst.Kind() == reflect.Ptr && dst.Elem().CanSet() {
+				dst.Elem().Set(src)
+			} else if dst.CanSet() {
+				dst.Set(src)
+			}
+		} else {
+			e := src.Type().Elem()
+			if dst.CanSet() && !src.IsNil() {
+				if _, ok := src.Interface().(*time.Time); !ok {
+					dst.Set(reflect.New(e))
+				} else {
+					tempValue := reflect.New(e)
+					tempValue.Elem().Set(src.Elem())
+					// Sets time.Time's unexported values
+					dst.Set(tempValue)
+				}
+			}
+			if src.Elem().IsValid() {
+				// Keep the current root state since the depth hasn't changed
+				rcopy(dst.Elem(), src.Elem(), root)
+			}
+		}
+	case reflect.Struct:
+		t := dst.Type()
+		for i := 0; i < t.NumField(); i++ {
+			name := t.Field(i).Name
+			srcVal := src.FieldByName(name)
+			dstVal := dst.FieldByName(name)
+			if srcVal.IsValid() && dstVal.CanSet() {
+				rcopy(dstVal, srcVal, false)
+			}
+		}
+	case reflect.Slice:
+		if src.IsNil() {
+			break
+		}
+
+		s := reflect.MakeSlice(src.Type(), src.Len(), src.Cap())
+		dst.Set(s)
+		for i := 0; i < src.Len(); i++ {
+			rcopy(dst.Index(i), src.Index(i), false)
+		}
+	case reflect.Map:
+		if src.IsNil() {
+			break
+		}
+
+		s := reflect.MakeMap(src.Type())
+		dst.Set(s)
+		for _, k := range src.MapKeys() {
+			v := src.MapIndex(k)
+			v2 := reflect.New(v.Type()).Elem()
+			rcopy(v2, v, false)
+			dst.SetMapIndex(k, v2)
+		}
+	default:
+		// Assign the value if possible. If its not assignable, the value would
+		// need to be converted and the impact of that may be unexpected, or is
+		// not compatible with the dst type.
+		if src.Type().AssignableTo(dst.Type()) {
+			dst.Set(src)
+		}
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/awsutil/equal.go

@@ -0,0 +1,27 @@
+package awsutil
+
+import (
+	"reflect"
+)
+
+// DeepEqual returns if the two values are deeply equal like reflect.DeepEqual.
+// In addition to this, this method will also dereference the input values if
+// possible so the DeepEqual performed will not fail if one parameter is a
+// pointer and the other is not.
+//
+// DeepEqual will not perform indirection of nested values of the input parameters.
+func DeepEqual(a, b interface{}) bool {
+	ra := reflect.Indirect(reflect.ValueOf(a))
+	rb := reflect.Indirect(reflect.ValueOf(b))
+
+	if raValid, rbValid := ra.IsValid(), rb.IsValid(); !raValid && !rbValid {
+		// If the elements are both nil, and of the same type they are equal
+		// If they are of different types they are not equal
+		return reflect.TypeOf(a) == reflect.TypeOf(b)
+	} else if raValid != rbValid {
+		// Both values must be valid to be equal
+		return false
+	}
+
+	return reflect.DeepEqual(ra.Interface(), rb.Interface())
+}

vendor/github.com/aws/aws-sdk-go/aws/awsutil/path_value.go

@@ -0,0 +1,221 @@
+package awsutil
+
+import (
+	"reflect"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/jmespath/go-jmespath"
+)
+
+var indexRe = regexp.MustCompile(`(.+)\[(-?\d+)?\]$`)
+
+// rValuesAtPath returns a slice of values found in value v. The values
+// in v are explored recursively so all nested values are collected.
+func rValuesAtPath(v interface{}, path string, createPath, caseSensitive, nilTerm bool) []reflect.Value {
+	pathparts := strings.Split(path, "||")
+	if len(pathparts) > 1 {
+		for _, pathpart := range pathparts {
+			vals := rValuesAtPath(v, pathpart, createPath, caseSensitive, nilTerm)
+			if len(vals) > 0 {
+				return vals
+			}
+		}
+		return nil
+	}
+
+	values := []reflect.Value{reflect.Indirect(reflect.ValueOf(v))}
+	components := strings.Split(path, ".")
+	for len(values) > 0 && len(components) > 0 {
+		var index *int64
+		var indexStar bool
+		c := strings.TrimSpace(components[0])
+		if c == "" { // no actual component, illegal syntax
+			return nil
+		} else if caseSensitive && c != "*" && strings.ToLower(c[0:1]) == c[0:1] {
+			// TODO normalize case for user
+			return nil // don't support unexported fields
+		}
+
+		// parse this component
+		if m := indexRe.FindStringSubmatch(c); m != nil {
+			c = m[1]
+			if m[2] == "" {
+				index = nil
+				indexStar = true
+			} else {
+				i, _ := strconv.ParseInt(m[2], 10, 32)
+				index = &i
+				indexStar = false
+			}
+		}
+
+		nextvals := []reflect.Value{}
+		for _, value := range values {
+			// pull component name out of struct member
+			if value.Kind() != reflect.Struct {
+				continue
+			}
+
+			if c == "*" { // pull all members
+				for i := 0; i < value.NumField(); i++ {
+					if f := reflect.Indirect(value.Field(i)); f.IsValid() {
+						nextvals = append(nextvals, f)
+					}
+				}
+				continue
+			}
+
+			value = value.FieldByNameFunc(func(name string) bool {
+				if c == name {
+					return true
+				} else if !caseSensitive && strings.ToLower(name) == strings.ToLower(c) {
+					return true
+				}
+				return false
+			})
+
+			if nilTerm && value.Kind() == reflect.Ptr && len(components[1:]) == 0 {
+				if !value.IsNil() {
+					value.Set(reflect.Zero(value.Type()))
+				}
+				return []reflect.Value{value}
+			}
+
+			if createPath && value.Kind() == reflect.Ptr && value.IsNil() {
+				// TODO if the value is the terminus it should not be created
+				// if the value to be set to its position is nil.
+				value.Set(reflect.New(value.Type().Elem()))
+				value = value.Elem()
+			} else {
+				value = reflect.Indirect(value)
+			}
+
+			if value.Kind() == reflect.Slice || value.Kind() == reflect.Map {
+				if !createPath && value.IsNil() {
+					value = reflect.ValueOf(nil)
+				}
+			}
+
+			if value.IsValid() {
+				nextvals = append(nextvals, value)
+			}
+		}
+		values = nextvals
+
+		if indexStar || index != nil {
+			nextvals = []reflect.Value{}
+			for _, valItem := range values {
+				value := reflect.Indirect(valItem)
+				if value.Kind() != reflect.Slice {
+					continue
+				}
+
+				if indexStar { // grab all indices
+					for i := 0; i < value.Len(); i++ {
+						idx := reflect.Indirect(value.Index(i))
+						if idx.IsValid() {
+							nextvals = append(nextvals, idx)
+						}
+					}
+					continue
+				}
+
+				// pull out index
+				i := int(*index)
+				if i >= value.Len() { // check out of bounds
+					if createPath {
+						// TODO resize slice
+					} else {
+						continue
+					}
+				} else if i < 0 { // support negative indexing
+					i = value.Len() + i
+				}
+				value = reflect.Indirect(value.Index(i))
+
+				if value.Kind() == reflect.Slice || value.Kind() == reflect.Map {
+					if !createPath && value.IsNil() {
+						value = reflect.ValueOf(nil)
+					}
+				}
+
+				if value.IsValid() {
+					nextvals = append(nextvals, value)
+				}
+			}
+			values = nextvals
+		}
+
+		components = components[1:]
+	}
+	return values
+}
+
+// ValuesAtPath returns a list of values at the case insensitive lexical
+// path inside of a structure.
+func ValuesAtPath(i interface{}, path string) ([]interface{}, error) {
+	result, err := jmespath.Search(path, i)
+	if err != nil {
+		return nil, err
+	}
+
+	v := reflect.ValueOf(result)
+	if !v.IsValid() || (v.Kind() == reflect.Ptr && v.IsNil()) {
+		return nil, nil
+	}
+	if s, ok := result.([]interface{}); ok {
+		return s, err
+	}
+	if v.Kind() == reflect.Map && v.Len() == 0 {
+		return nil, nil
+	}
+	if v.Kind() == reflect.Slice {
+		out := make([]interface{}, v.Len())
+		for i := 0; i < v.Len(); i++ {
+			out[i] = v.Index(i).Interface()
+		}
+		return out, nil
+	}
+
+	return []interface{}{result}, nil
+}
+
+// SetValueAtPath sets a value at the case insensitive lexical path inside
+// of a structure.
+func SetValueAtPath(i interface{}, path string, v interface{}) {
+	rvals := rValuesAtPath(i, path, true, false, v == nil)
+	for _, rval := range rvals {
+		if rval.Kind() == reflect.Ptr && rval.IsNil() {
+			continue
+		}
+		setValue(rval, v)
+	}
+}
+
+func setValue(dstVal reflect.Value, src interface{}) {
+	if dstVal.Kind() == reflect.Ptr {
+		dstVal = reflect.Indirect(dstVal)
+	}
+	srcVal := reflect.ValueOf(src)
+
+	if !srcVal.IsValid() { // src is literal nil
+		if dstVal.CanAddr() {
+			// Convert to pointer so that pointer's value can be nil'ed
+			//                     dstVal = dstVal.Addr()
+		}
+		dstVal.Set(reflect.Zero(dstVal.Type()))
+
+	} else if srcVal.Kind() == reflect.Ptr {
+		if srcVal.IsNil() {
+			srcVal = reflect.Zero(dstVal.Type())
+		} else {
+			srcVal = reflect.ValueOf(src).Elem()
+		}
+		dstVal.Set(srcVal)
+	} else {
+		dstVal.Set(srcVal)
+	}
+
+}

vendor/github.com/aws/aws-sdk-go/aws/awsutil/prettify.go

@@ -0,0 +1,113 @@
+package awsutil
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"reflect"
+	"strings"
+)
+
+// Prettify returns the string representation of a value.
+func Prettify(i interface{}) string {
+	var buf bytes.Buffer
+	prettify(reflect.ValueOf(i), 0, &buf)
+	return buf.String()
+}
+
+// prettify will recursively walk value v to build a textual
+// representation of the value.
+func prettify(v reflect.Value, indent int, buf *bytes.Buffer) {
+	for v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	switch v.Kind() {
+	case reflect.Struct:
+		strtype := v.Type().String()
+		if strtype == "time.Time" {
+			fmt.Fprintf(buf, "%s", v.Interface())
+			break
+		} else if strings.HasPrefix(strtype, "io.") {
+			buf.WriteString("<buffer>")
+			break
+		}
+
+		buf.WriteString("{\n")
+
+		names := []string{}
+		for i := 0; i < v.Type().NumField(); i++ {
+			name := v.Type().Field(i).Name
+			f := v.Field(i)
+			if name[0:1] == strings.ToLower(name[0:1]) {
+				continue // ignore unexported fields
+			}
+			if (f.Kind() == reflect.Ptr || f.Kind() == reflect.Slice || f.Kind() == reflect.Map) && f.IsNil() {
+				continue // ignore unset fields
+			}
+			names = append(names, name)
+		}
+
+		for i, n := range names {
+			val := v.FieldByName(n)
+			buf.WriteString(strings.Repeat(" ", indent+2))
+			buf.WriteString(n + ": ")
+			prettify(val, indent+2, buf)
+
+			if i < len(names)-1 {
+				buf.WriteString(",\n")
+			}
+		}
+
+		buf.WriteString("\n" + strings.Repeat(" ", indent) + "}")
+	case reflect.Slice:
+		strtype := v.Type().String()
+		if strtype == "[]uint8" {
+			fmt.Fprintf(buf, "<binary> len %d", v.Len())
+			break
+		}
+
+		nl, id, id2 := "", "", ""
+		if v.Len() > 3 {
+			nl, id, id2 = "\n", strings.Repeat(" ", indent), strings.Repeat(" ", indent+2)
+		}
+		buf.WriteString("[" + nl)
+		for i := 0; i < v.Len(); i++ {
+			buf.WriteString(id2)
+			prettify(v.Index(i), indent+2, buf)
+
+			if i < v.Len()-1 {
+				buf.WriteString("," + nl)
+			}
+		}
+
+		buf.WriteString(nl + id + "]")
+	case reflect.Map:
+		buf.WriteString("{\n")
+
+		for i, k := range v.MapKeys() {
+			buf.WriteString(strings.Repeat(" ", indent+2))
+			buf.WriteString(k.String() + ": ")
+			prettify(v.MapIndex(k), indent+2, buf)
+
+			if i < v.Len()-1 {
+				buf.WriteString(",\n")
+			}
+		}
+
+		buf.WriteString("\n" + strings.Repeat(" ", indent) + "}")
+	default:
+		if !v.IsValid() {
+			fmt.Fprint(buf, "<invalid value>")
+			return
+		}
+		format := "%v"
+		switch v.Interface().(type) {
+		case string:
+			format = "%q"
+		case io.ReadSeeker, io.Reader:
+			format = "buffer(%p)"
+		}
+		fmt.Fprintf(buf, format, v.Interface())
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/awsutil/string_value.go

@@ -0,0 +1,88 @@
+package awsutil
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// StringValue returns the string representation of a value.
+func StringValue(i interface{}) string {
+	var buf bytes.Buffer
+	stringValue(reflect.ValueOf(i), 0, &buf)
+	return buf.String()
+}
+
+func stringValue(v reflect.Value, indent int, buf *bytes.Buffer) {
+	for v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	switch v.Kind() {
+	case reflect.Struct:
+		buf.WriteString("{\n")
+
+		for i := 0; i < v.Type().NumField(); i++ {
+			ft := v.Type().Field(i)
+			fv := v.Field(i)
+
+			if ft.Name[0:1] == strings.ToLower(ft.Name[0:1]) {
+				continue // ignore unexported fields
+			}
+			if (fv.Kind() == reflect.Ptr || fv.Kind() == reflect.Slice) && fv.IsNil() {
+				continue // ignore unset fields
+			}
+
+			buf.WriteString(strings.Repeat(" ", indent+2))
+			buf.WriteString(ft.Name + ": ")
+
+			if tag := ft.Tag.Get("sensitive"); tag == "true" {
+				buf.WriteString("<sensitive>")
+			} else {
+				stringValue(fv, indent+2, buf)
+			}
+
+			buf.WriteString(",\n")
+		}
+
+		buf.WriteString("\n" + strings.Repeat(" ", indent) + "}")
+	case reflect.Slice:
+		nl, id, id2 := "", "", ""
+		if v.Len() > 3 {
+			nl, id, id2 = "\n", strings.Repeat(" ", indent), strings.Repeat(" ", indent+2)
+		}
+		buf.WriteString("[" + nl)
+		for i := 0; i < v.Len(); i++ {
+			buf.WriteString(id2)
+			stringValue(v.Index(i), indent+2, buf)
+
+			if i < v.Len()-1 {
+				buf.WriteString("," + nl)
+			}
+		}
+
+		buf.WriteString(nl + id + "]")
+	case reflect.Map:
+		buf.WriteString("{\n")
+
+		for i, k := range v.MapKeys() {
+			buf.WriteString(strings.Repeat(" ", indent+2))
+			buf.WriteString(k.String() + ": ")
+			stringValue(v.MapIndex(k), indent+2, buf)
+
+			if i < v.Len()-1 {
+				buf.WriteString(",\n")
+			}
+		}
+
+		buf.WriteString("\n" + strings.Repeat(" ", indent) + "}")
+	default:
+		format := "%v"
+		switch v.Interface().(type) {
+		case string:
+			format = "%q"
+		}
+		fmt.Fprintf(buf, format, v.Interface())
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/client/client.go

@@ -0,0 +1,96 @@
+package client
+
+import (
+	"fmt"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/client/metadata"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+// A Config provides configuration to a service client instance.
+type Config struct {
+	Config        *aws.Config
+	Handlers      request.Handlers
+	Endpoint      string
+	SigningRegion string
+	SigningName   string
+
+	// States that the signing name did not come from a modeled source but
+	// was derived based on other data. Used by service client constructors
+	// to determine if the signin name can be overridden based on metadata the
+	// service has.
+	SigningNameDerived bool
+}
+
+// ConfigProvider provides a generic way for a service client to receive
+// the ClientConfig without circular dependencies.
+type ConfigProvider interface {
+	ClientConfig(serviceName string, cfgs ...*aws.Config) Config
+}
+
+// ConfigNoResolveEndpointProvider same as ConfigProvider except it will not
+// resolve the endpoint automatically. The service client's endpoint must be
+// provided via the aws.Config.Endpoint field.
+type ConfigNoResolveEndpointProvider interface {
+	ClientConfigNoResolveEndpoint(cfgs ...*aws.Config) Config
+}
+
+// A Client implements the base client request and response handling
+// used by all service clients.
+type Client struct {
+	request.Retryer
+	metadata.ClientInfo
+
+	Config   aws.Config
+	Handlers request.Handlers
+}
+
+// New will return a pointer to a new initialized service client.
+func New(cfg aws.Config, info metadata.ClientInfo, handlers request.Handlers, options ...func(*Client)) *Client {
+	svc := &Client{
+		Config:     cfg,
+		ClientInfo: info,
+		Handlers:   handlers.Copy(),
+	}
+
+	switch retryer, ok := cfg.Retryer.(request.Retryer); {
+	case ok:
+		svc.Retryer = retryer
+	case cfg.Retryer != nil && cfg.Logger != nil:
+		s := fmt.Sprintf("WARNING: %T does not implement request.Retryer; using DefaultRetryer instead", cfg.Retryer)
+		cfg.Logger.Log(s)
+		fallthrough
+	default:
+		maxRetries := aws.IntValue(cfg.MaxRetries)
+		if cfg.MaxRetries == nil || maxRetries == aws.UseServiceDefaultRetries {
+			maxRetries = 3
+		}
+		svc.Retryer = DefaultRetryer{NumMaxRetries: maxRetries}
+	}
+
+	svc.AddDebugHandlers()
+
+	for _, option := range options {
+		option(svc)
+	}
+
+	return svc
+}
+
+// NewRequest returns a new Request pointer for the service API
+// operation and parameters.
+func (c *Client) NewRequest(operation *request.Operation, params interface{}, data interface{}) *request.Request {
+	return request.New(c.Config, c.ClientInfo, c.Handlers, c.Retryer, operation, params, data)
+}
+
+// AddDebugHandlers injects debug logging handlers into the service to log request
+// debug information.
+func (c *Client) AddDebugHandlers() {
+	if !c.Config.LogLevel.AtLeast(aws.LogDebug) {
+		return
+	}
+
+	c.Handlers.Send.PushFrontNamed(LogHTTPRequestHandler)
+	c.Handlers.Send.PushBackNamed(LogHTTPResponseHandler)
+}

vendor/github.com/aws/aws-sdk-go/aws/client/default_retryer.go

@@ -0,0 +1,103 @@
+package client
+
+import (
+	"strconv"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/sdkrand"
+)
+
+// DefaultRetryer implements basic retry logic using exponential backoff for
+// most services. If you want to implement custom retry logic, implement the
+// request.Retryer interface or create a structure type that composes this
+// struct and override the specific methods. For example, to override only
+// the MaxRetries method:
+//
+//   type retryer struct {
+//       client.DefaultRetryer
+//   }
+//
+//   // This implementation always has 100 max retries
+//   func (d retryer) MaxRetries() int { return 100 }
+type DefaultRetryer struct {
+	NumMaxRetries int
+}
+
+// MaxRetries returns the number of maximum returns the service will use to make
+// an individual API request.
+func (d DefaultRetryer) MaxRetries() int {
+	return d.NumMaxRetries
+}
+
+// RetryRules returns the delay duration before retrying this request again
+func (d DefaultRetryer) RetryRules(r *request.Request) time.Duration {
+	// Set the upper limit of delay in retrying at ~five minutes
+	minTime := 30
+	isThrottle := r.IsErrorThrottle()
+	if isThrottle {
+		if delay, ok := getRetryDelay(r); ok {
+			return delay
+		}
+
+		minTime = 500
+	}
+
+	retryCount := r.RetryCount
+	if isThrottle && retryCount > 8 {
+		retryCount = 8
+	} else if retryCount > 13 {
+		retryCount = 13
+	}
+
+	delay := (1 << uint(retryCount)) * (sdkrand.SeededRand.Intn(minTime) + minTime)
+	return time.Duration(delay) * time.Millisecond
+}
+
+// ShouldRetry returns true if the request should be retried.
+func (d DefaultRetryer) ShouldRetry(r *request.Request) bool {
+	// If one of the other handlers already set the retry state
+	// we don't want to override it based on the service's state
+	if r.Retryable != nil {
+		return *r.Retryable
+	}
+
+	if r.HTTPResponse.StatusCode >= 500 && r.HTTPResponse.StatusCode != 501 {
+		return true
+	}
+
+	return r.IsErrorRetryable() || r.IsErrorThrottle()
+}
+
+// This will look in the Retry-After header, RFC 7231, for how long
+// it will wait before attempting another request
+func getRetryDelay(r *request.Request) (time.Duration, bool) {
+	if !canUseRetryAfterHeader(r) {
+		return 0, false
+	}
+
+	delayStr := r.HTTPResponse.Header.Get("Retry-After")
+	if len(delayStr) == 0 {
+		return 0, false
+	}
+
+	delay, err := strconv.Atoi(delayStr)
+	if err != nil {
+		return 0, false
+	}
+
+	return time.Duration(delay) * time.Second, true
+}
+
+// Will look at the status code to see if the retry header pertains to
+// the status code.
+func canUseRetryAfterHeader(r *request.Request) bool {
+	switch r.HTTPResponse.StatusCode {
+	case 429:
+	case 503:
+	default:
+		return false
+	}
+
+	return true
+}

vendor/github.com/aws/aws-sdk-go/aws/client/logger.go

@@ -0,0 +1,194 @@
+package client
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http/httputil"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+const logReqMsg = `DEBUG: Request %s/%s Details:
+---[ REQUEST POST-SIGN ]-----------------------------
+%s
+-----------------------------------------------------`
+
+const logReqErrMsg = `DEBUG ERROR: Request %s/%s:
+---[ REQUEST DUMP ERROR ]-----------------------------
+%s
+------------------------------------------------------`
+
+type logWriter struct {
+	// Logger is what we will use to log the payload of a response.
+	Logger aws.Logger
+	// buf stores the contents of what has been read
+	buf *bytes.Buffer
+}
+
+func (logger *logWriter) Write(b []byte) (int, error) {
+	return logger.buf.Write(b)
+}
+
+type teeReaderCloser struct {
+	// io.Reader will be a tee reader that is used during logging.
+	// This structure will read from a body and write the contents to a logger.
+	io.Reader
+	// Source is used just to close when we are done reading.
+	Source io.ReadCloser
+}
+
+func (reader *teeReaderCloser) Close() error {
+	return reader.Source.Close()
+}
+
+// LogHTTPRequestHandler is a SDK request handler to log the HTTP request sent
+// to a service. Will include the HTTP request body if the LogLevel of the
+// request matches LogDebugWithHTTPBody.
+var LogHTTPRequestHandler = request.NamedHandler{
+	Name: "awssdk.client.LogRequest",
+	Fn:   logRequest,
+}
+
+func logRequest(r *request.Request) {
+	logBody := r.Config.LogLevel.Matches(aws.LogDebugWithHTTPBody)
+	bodySeekable := aws.IsReaderSeekable(r.Body)
+
+	b, err := httputil.DumpRequestOut(r.HTTPRequest, logBody)
+	if err != nil {
+		r.Config.Logger.Log(fmt.Sprintf(logReqErrMsg,
+			r.ClientInfo.ServiceName, r.Operation.Name, err))
+		return
+	}
+
+	if logBody {
+		if !bodySeekable {
+			r.SetReaderBody(aws.ReadSeekCloser(r.HTTPRequest.Body))
+		}
+		// Reset the request body because dumpRequest will re-wrap the
+		// r.HTTPRequest's Body as a NoOpCloser and will not be reset after
+		// read by the HTTP client reader.
+		if err := r.Error; err != nil {
+			r.Config.Logger.Log(fmt.Sprintf(logReqErrMsg,
+				r.ClientInfo.ServiceName, r.Operation.Name, err))
+			return
+		}
+	}
+
+	r.Config.Logger.Log(fmt.Sprintf(logReqMsg,
+		r.ClientInfo.ServiceName, r.Operation.Name, string(b)))
+}
+
+// LogHTTPRequestHeaderHandler is a SDK request handler to log the HTTP request sent
+// to a service. Will only log the HTTP request's headers. The request payload
+// will not be read.
+var LogHTTPRequestHeaderHandler = request.NamedHandler{
+	Name: "awssdk.client.LogRequestHeader",
+	Fn:   logRequestHeader,
+}
+
+func logRequestHeader(r *request.Request) {
+	b, err := httputil.DumpRequestOut(r.HTTPRequest, false)
+	if err != nil {
+		r.Config.Logger.Log(fmt.Sprintf(logReqErrMsg,
+			r.ClientInfo.ServiceName, r.Operation.Name, err))
+		return
+	}
+
+	r.Config.Logger.Log(fmt.Sprintf(logReqMsg,
+		r.ClientInfo.ServiceName, r.Operation.Name, string(b)))
+}
+
+const logRespMsg = `DEBUG: Response %s/%s Details:
+---[ RESPONSE ]--------------------------------------
+%s
+-----------------------------------------------------`
+
+const logRespErrMsg = `DEBUG ERROR: Response %s/%s:
+---[ RESPONSE DUMP ERROR ]-----------------------------
+%s
+-----------------------------------------------------`
+
+// LogHTTPResponseHandler is a SDK request handler to log the HTTP response
+// received from a service. Will include the HTTP response body if the LogLevel
+// of the request matches LogDebugWithHTTPBody.
+var LogHTTPResponseHandler = request.NamedHandler{
+	Name: "awssdk.client.LogResponse",
+	Fn:   logResponse,
+}
+
+func logResponse(r *request.Request) {
+	lw := &logWriter{r.Config.Logger, bytes.NewBuffer(nil)}
+
+	if r.HTTPResponse == nil {
+		lw.Logger.Log(fmt.Sprintf(logRespErrMsg,
+			r.ClientInfo.ServiceName, r.Operation.Name, "request's HTTPResponse is nil"))
+		return
+	}
+
+	logBody := r.Config.LogLevel.Matches(aws.LogDebugWithHTTPBody)
+	if logBody {
+		r.HTTPResponse.Body = &teeReaderCloser{
+			Reader: io.TeeReader(r.HTTPResponse.Body, lw),
+			Source: r.HTTPResponse.Body,
+		}
+	}
+
+	handlerFn := func(req *request.Request) {
+		b, err := httputil.DumpResponse(req.HTTPResponse, false)
+		if err != nil {
+			lw.Logger.Log(fmt.Sprintf(logRespErrMsg,
+				req.ClientInfo.ServiceName, req.Operation.Name, err))
+			return
+		}
+
+		lw.Logger.Log(fmt.Sprintf(logRespMsg,
+			req.ClientInfo.ServiceName, req.Operation.Name, string(b)))
+
+		if logBody {
+			b, err := ioutil.ReadAll(lw.buf)
+			if err != nil {
+				lw.Logger.Log(fmt.Sprintf(logRespErrMsg,
+					req.ClientInfo.ServiceName, req.Operation.Name, err))
+				return
+			}
+
+			lw.Logger.Log(string(b))
+		}
+	}
+
+	const handlerName = "awsdk.client.LogResponse.ResponseBody"
+
+	r.Handlers.Unmarshal.SetBackNamed(request.NamedHandler{
+		Name: handlerName, Fn: handlerFn,
+	})
+	r.Handlers.UnmarshalError.SetBackNamed(request.NamedHandler{
+		Name: handlerName, Fn: handlerFn,
+	})
+}
+
+// LogHTTPResponseHeaderHandler is a SDK request handler to log the HTTP
+// response received from a service. Will only log the HTTP response's headers.
+// The response payload will not be read.
+var LogHTTPResponseHeaderHandler = request.NamedHandler{
+	Name: "awssdk.client.LogResponseHeader",
+	Fn:   logResponseHeader,
+}
+
+func logResponseHeader(r *request.Request) {
+	if r.Config.Logger == nil {
+		return
+	}
+
+	b, err := httputil.DumpResponse(r.HTTPResponse, false)
+	if err != nil {
+		r.Config.Logger.Log(fmt.Sprintf(logRespErrMsg,
+			r.ClientInfo.ServiceName, r.Operation.Name, err))
+		return
+	}
+
+	r.Config.Logger.Log(fmt.Sprintf(logRespMsg,
+		r.ClientInfo.ServiceName, r.Operation.Name, string(b)))
+}

vendor/github.com/aws/aws-sdk-go/aws/client/metadata/client_info.go

@@ -0,0 +1,13 @@
+package metadata
+
+// ClientInfo wraps immutable data from the client.Client structure.
+type ClientInfo struct {
+	ServiceName   string
+	ServiceID     string
+	APIVersion    string
+	Endpoint      string
+	SigningName   string
+	SigningRegion string
+	JSONVersion   string
+	TargetPrefix  string
+}

vendor/github.com/aws/aws-sdk-go/aws/config.go

@@ -0,0 +1,536 @@
+package aws
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/endpoints"
+)
+
+// UseServiceDefaultRetries instructs the config to use the service's own
+// default number of retries. This will be the default action if
+// Config.MaxRetries is nil also.
+const UseServiceDefaultRetries = -1
+
+// RequestRetryer is an alias for a type that implements the request.Retryer
+// interface.
+type RequestRetryer interface{}
+
+// A Config provides service configuration for service clients. By default,
+// all clients will use the defaults.DefaultConfig structure.
+//
+//     // Create Session with MaxRetries configuration to be shared by multiple
+//     // service clients.
+//     sess := session.Must(session.NewSession(&aws.Config{
+//         MaxRetries: aws.Int(3),
+//     }))
+//
+//     // Create S3 service client with a specific Region.
+//     svc := s3.New(sess, &aws.Config{
+//         Region: aws.String("us-west-2"),
+//     })
+type Config struct {
+	// Enables verbose error printing of all credential chain errors.
+	// Should be used when wanting to see all errors while attempting to
+	// retrieve credentials.
+	CredentialsChainVerboseErrors *bool
+
+	// The credentials object to use when signing requests. Defaults to a
+	// chain of credential providers to search for credentials in environment
+	// variables, shared credential file, and EC2 Instance Roles.
+	Credentials *credentials.Credentials
+
+	// An optional endpoint URL (hostname only or fully qualified URI)
+	// that overrides the default generated endpoint for a client. Set this
+	// to `""` to use the default generated endpoint.
+	//
+	// Note: You must still provide a `Region` value when specifying an
+	// endpoint for a client.
+	Endpoint *string
+
+	// The resolver to use for looking up endpoints for AWS service clients
+	// to use based on region.
+	EndpointResolver endpoints.Resolver
+
+	// EnforceShouldRetryCheck is used in the AfterRetryHandler to always call
+	// ShouldRetry regardless of whether or not if request.Retryable is set.
+	// This will utilize ShouldRetry method of custom retryers. If EnforceShouldRetryCheck
+	// is not set, then ShouldRetry will only be called if request.Retryable is nil.
+	// Proper handling of the request.Retryable field is important when setting this field.
+	EnforceShouldRetryCheck *bool
+
+	// The region to send requests to. This parameter is required and must
+	// be configured globally or on a per-client basis unless otherwise
+	// noted. A full list of regions is found in the "Regions and Endpoints"
+	// document.
+	//
+	// See http://docs.aws.amazon.com/general/latest/gr/rande.html for AWS
+	// Regions and Endpoints.
+	Region *string
+
+	// Set this to `true` to disable SSL when sending requests. Defaults
+	// to `false`.
+	DisableSSL *bool
+
+	// The HTTP client to use when sending requests. Defaults to
+	// `http.DefaultClient`.
+	HTTPClient *http.Client
+
+	// An integer value representing the logging level. The default log level
+	// is zero (LogOff), which represents no logging. To enable logging set
+	// to a LogLevel Value.
+	LogLevel *LogLevelType
+
+	// The logger writer interface to write logging messages to. Defaults to
+	// standard out.
+	Logger Logger
+
+	// The maximum number of times that a request will be retried for failures.
+	// Defaults to -1, which defers the max retry setting to the service
+	// specific configuration.
+	MaxRetries *int
+
+	// Retryer guides how HTTP requests should be retried in case of
+	// recoverable failures.
+	//
+	// When nil or the value does not implement the request.Retryer interface,
+	// the client.DefaultRetryer will be used.
+	//
+	// When both Retryer and MaxRetries are non-nil, the former is used and
+	// the latter ignored.
+	//
+	// To set the Retryer field in a type-safe manner and with chaining, use
+	// the request.WithRetryer helper function:
+	//
+	//   cfg := request.WithRetryer(aws.NewConfig(), myRetryer)
+	//
+	Retryer RequestRetryer
+
+	// Disables semantic parameter validation, which validates input for
+	// missing required fields and/or other semantic request input errors.
+	DisableParamValidation *bool
+
+	// Disables the computation of request and response checksums, e.g.,
+	// CRC32 checksums in Amazon DynamoDB.
+	DisableComputeChecksums *bool
+
+	// Set this to `true` to force the request to use path-style addressing,
+	// i.e., `http://s3.amazonaws.com/BUCKET/KEY`. By default, the S3 client
+	// will use virtual hosted bucket addressing when possible
+	// (`http://BUCKET.s3.amazonaws.com/KEY`).
+	//
+	// Note: This configuration option is specific to the Amazon S3 service.
+	//
+	// See http://docs.aws.amazon.com/AmazonS3/latest/dev/VirtualHosting.html
+	// for Amazon S3: Virtual Hosting of Buckets
+	S3ForcePathStyle *bool
+
+	// Set this to `true` to disable the SDK adding the `Expect: 100-Continue`
+	// header to PUT requests over 2MB of content. 100-Continue instructs the
+	// HTTP client not to send the body until the service responds with a
+	// `continue` status. This is useful to prevent sending the request body
+	// until after the request is authenticated, and validated.
+	//
+	// http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPUT.html
+	//
+	// 100-Continue is only enabled for Go 1.6 and above. See `http.Transport`'s
+	// `ExpectContinueTimeout` for information on adjusting the continue wait
+	// timeout. https://golang.org/pkg/net/http/#Transport
+	//
+	// You should use this flag to disble 100-Continue if you experience issues
+	// with proxies or third party S3 compatible services.
+	S3Disable100Continue *bool
+
+	// Set this to `true` to enable S3 Accelerate feature. For all operations
+	// compatible with S3 Accelerate will use the accelerate endpoint for
+	// requests. Requests not compatible will fall back to normal S3 requests.
+	//
+	// The bucket must be enable for accelerate to be used with S3 client with
+	// accelerate enabled. If the bucket is not enabled for accelerate an error
+	// will be returned. The bucket name must be DNS compatible to also work
+	// with accelerate.
+	S3UseAccelerate *bool
+
+	// S3DisableContentMD5Validation config option is temporarily disabled,
+	// For S3 GetObject API calls, #1837.
+	//
+	// Set this to `true` to disable the S3 service client from automatically
+	// adding the ContentMD5 to S3 Object Put and Upload API calls. This option
+	// will also disable the SDK from performing object ContentMD5 validation
+	// on GetObject API calls.
+	S3DisableContentMD5Validation *bool
+
+	// Set this to `true` to disable the EC2Metadata client from overriding the
+	// default http.Client's Timeout. This is helpful if you do not want the
+	// EC2Metadata client to create a new http.Client. This options is only
+	// meaningful if you're not already using a custom HTTP client with the
+	// SDK. Enabled by default.
+	//
+	// Must be set and provided to the session.NewSession() in order to disable
+	// the EC2Metadata overriding the timeout for default credentials chain.
+	//
+	// Example:
+	//    sess := session.Must(session.NewSession(aws.NewConfig()
+	//       .WithEC2MetadataDiableTimeoutOverride(true)))
+	//
+	//    svc := s3.New(sess)
+	//
+	EC2MetadataDisableTimeoutOverride *bool
+
+	// Instructs the endpoint to be generated for a service client to
+	// be the dual stack endpoint. The dual stack endpoint will support
+	// both IPv4 and IPv6 addressing.
+	//
+	// Setting this for a service which does not support dual stack will fail
+	// to make requets. It is not recommended to set this value on the session
+	// as it will apply to all service clients created with the session. Even
+	// services which don't support dual stack endpoints.
+	//
+	// If the Endpoint config value is also provided the UseDualStack flag
+	// will be ignored.
+	//
+	// Only supported with.
+	//
+	//     sess := session.Must(session.NewSession())
+	//
+	//     svc := s3.New(sess, &aws.Config{
+	//         UseDualStack: aws.Bool(true),
+	//     })
+	UseDualStack *bool
+
+	// SleepDelay is an override for the func the SDK will call when sleeping
+	// during the lifecycle of a request. Specifically this will be used for
+	// request delays. This value should only be used for testing. To adjust
+	// the delay of a request see the aws/client.DefaultRetryer and
+	// aws/request.Retryer.
+	//
+	// SleepDelay will prevent any Context from being used for canceling retry
+	// delay of an API operation. It is recommended to not use SleepDelay at all
+	// and specify a Retryer instead.
+	SleepDelay func(time.Duration)
+
+	// DisableRestProtocolURICleaning will not clean the URL path when making rest protocol requests.
+	// Will default to false. This would only be used for empty directory names in s3 requests.
+	//
+	// Example:
+	//    sess := session.Must(session.NewSession(&aws.Config{
+	//         DisableRestProtocolURICleaning: aws.Bool(true),
+	//    }))
+	//
+	//    svc := s3.New(sess)
+	//    out, err := svc.GetObject(&s3.GetObjectInput {
+	//    	Bucket: aws.String("bucketname"),
+	//    	Key: aws.String("//foo//bar//moo"),
+	//    })
+	DisableRestProtocolURICleaning *bool
+
+	// EnableEndpointDiscovery will allow for endpoint discovery on operations that
+	// have the definition in its model. By default, endpoint discovery is off.
+	//
+	// Example:
+	//    sess := session.Must(session.NewSession(&aws.Config{
+	//         EnableEndpointDiscovery: aws.Bool(true),
+	//    }))
+	//
+	//    svc := s3.New(sess)
+	//    out, err := svc.GetObject(&s3.GetObjectInput {
+	//    	Bucket: aws.String("bucketname"),
+	//    	Key: aws.String("/foo/bar/moo"),
+	//    })
+	EnableEndpointDiscovery *bool
+
+	// DisableEndpointHostPrefix will disable the SDK's behavior of prefixing
+	// request endpoint hosts with modeled information.
+	//
+	// Disabling this feature is useful when you want to use local endpoints
+	// for testing that do not support the modeled host prefix pattern.
+	DisableEndpointHostPrefix *bool
+}
+
+// NewConfig returns a new Config pointer that can be chained with builder
+// methods to set multiple configuration values inline without using pointers.
+//
+//     // Create Session with MaxRetries configuration to be shared by multiple
+//     // service clients.
+//     sess := session.Must(session.NewSession(aws.NewConfig().
+//         WithMaxRetries(3),
+//     ))
+//
+//     // Create S3 service client with a specific Region.
+//     svc := s3.New(sess, aws.NewConfig().
+//         WithRegion("us-west-2"),
+//     )
+func NewConfig() *Config {
+	return &Config{}
+}
+
+// WithCredentialsChainVerboseErrors sets a config verbose errors boolean and returning
+// a Config pointer.
+func (c *Config) WithCredentialsChainVerboseErrors(verboseErrs bool) *Config {
+	c.CredentialsChainVerboseErrors = &verboseErrs
+	return c
+}
+
+// WithCredentials sets a config Credentials value returning a Config pointer
+// for chaining.
+func (c *Config) WithCredentials(creds *credentials.Credentials) *Config {
+	c.Credentials = creds
+	return c
+}
+
+// WithEndpoint sets a config Endpoint value returning a Config pointer for
+// chaining.
+func (c *Config) WithEndpoint(endpoint string) *Config {
+	c.Endpoint = &endpoint
+	return c
+}
+
+// WithEndpointResolver sets a config EndpointResolver value returning a
+// Config pointer for chaining.
+func (c *Config) WithEndpointResolver(resolver endpoints.Resolver) *Config {
+	c.EndpointResolver = resolver
+	return c
+}
+
+// WithRegion sets a config Region value returning a Config pointer for
+// chaining.
+func (c *Config) WithRegion(region string) *Config {
+	c.Region = &region
+	return c
+}
+
+// WithDisableSSL sets a config DisableSSL value returning a Config pointer
+// for chaining.
+func (c *Config) WithDisableSSL(disable bool) *Config {
+	c.DisableSSL = &disable
+	return c
+}
+
+// WithHTTPClient sets a config HTTPClient value returning a Config pointer
+// for chaining.
+func (c *Config) WithHTTPClient(client *http.Client) *Config {
+	c.HTTPClient = client
+	return c
+}
+
+// WithMaxRetries sets a config MaxRetries value returning a Config pointer
+// for chaining.
+func (c *Config) WithMaxRetries(max int) *Config {
+	c.MaxRetries = &max
+	return c
+}
+
+// WithDisableParamValidation sets a config DisableParamValidation value
+// returning a Config pointer for chaining.
+func (c *Config) WithDisableParamValidation(disable bool) *Config {
+	c.DisableParamValidation = &disable
+	return c
+}
+
+// WithDisableComputeChecksums sets a config DisableComputeChecksums value
+// returning a Config pointer for chaining.
+func (c *Config) WithDisableComputeChecksums(disable bool) *Config {
+	c.DisableComputeChecksums = &disable
+	return c
+}
+
+// WithLogLevel sets a config LogLevel value returning a Config pointer for
+// chaining.
+func (c *Config) WithLogLevel(level LogLevelType) *Config {
+	c.LogLevel = &level
+	return c
+}
+
+// WithLogger sets a config Logger value returning a Config pointer for
+// chaining.
+func (c *Config) WithLogger(logger Logger) *Config {
+	c.Logger = logger
+	return c
+}
+
+// WithS3ForcePathStyle sets a config S3ForcePathStyle value returning a Config
+// pointer for chaining.
+func (c *Config) WithS3ForcePathStyle(force bool) *Config {
+	c.S3ForcePathStyle = &force
+	return c
+}
+
+// WithS3Disable100Continue sets a config S3Disable100Continue value returning
+// a Config pointer for chaining.
+func (c *Config) WithS3Disable100Continue(disable bool) *Config {
+	c.S3Disable100Continue = &disable
+	return c
+}
+
+// WithS3UseAccelerate sets a config S3UseAccelerate value returning a Config
+// pointer for chaining.
+func (c *Config) WithS3UseAccelerate(enable bool) *Config {
+	c.S3UseAccelerate = &enable
+	return c
+
+}
+
+// WithS3DisableContentMD5Validation sets a config
+// S3DisableContentMD5Validation value returning a Config pointer for chaining.
+func (c *Config) WithS3DisableContentMD5Validation(enable bool) *Config {
+	c.S3DisableContentMD5Validation = &enable
+	return c
+
+}
+
+// WithUseDualStack sets a config UseDualStack value returning a Config
+// pointer for chaining.
+func (c *Config) WithUseDualStack(enable bool) *Config {
+	c.UseDualStack = &enable
+	return c
+}
+
+// WithEC2MetadataDisableTimeoutOverride sets a config EC2MetadataDisableTimeoutOverride value
+// returning a Config pointer for chaining.
+func (c *Config) WithEC2MetadataDisableTimeoutOverride(enable bool) *Config {
+	c.EC2MetadataDisableTimeoutOverride = &enable
+	return c
+}
+
+// WithSleepDelay overrides the function used to sleep while waiting for the
+// next retry. Defaults to time.Sleep.
+func (c *Config) WithSleepDelay(fn func(time.Duration)) *Config {
+	c.SleepDelay = fn
+	return c
+}
+
+// WithEndpointDiscovery will set whether or not to use endpoint discovery.
+func (c *Config) WithEndpointDiscovery(t bool) *Config {
+	c.EnableEndpointDiscovery = &t
+	return c
+}
+
+// WithDisableEndpointHostPrefix will set whether or not to use modeled host prefix
+// when making requests.
+func (c *Config) WithDisableEndpointHostPrefix(t bool) *Config {
+	c.DisableEndpointHostPrefix = &t
+	return c
+}
+
+// MergeIn merges the passed in configs into the existing config object.
+func (c *Config) MergeIn(cfgs ...*Config) {
+	for _, other := range cfgs {
+		mergeInConfig(c, other)
+	}
+}
+
+func mergeInConfig(dst *Config, other *Config) {
+	if other == nil {
+		return
+	}
+
+	if other.CredentialsChainVerboseErrors != nil {
+		dst.CredentialsChainVerboseErrors = other.CredentialsChainVerboseErrors
+	}
+
+	if other.Credentials != nil {
+		dst.Credentials = other.Credentials
+	}
+
+	if other.Endpoint != nil {
+		dst.Endpoint = other.Endpoint
+	}
+
+	if other.EndpointResolver != nil {
+		dst.EndpointResolver = other.EndpointResolver
+	}
+
+	if other.Region != nil {
+		dst.Region = other.Region
+	}
+
+	if other.DisableSSL != nil {
+		dst.DisableSSL = other.DisableSSL
+	}
+
+	if other.HTTPClient != nil {
+		dst.HTTPClient = other.HTTPClient
+	}
+
+	if other.LogLevel != nil {
+		dst.LogLevel = other.LogLevel
+	}
+
+	if other.Logger != nil {
+		dst.Logger = other.Logger
+	}
+
+	if other.MaxRetries != nil {
+		dst.MaxRetries = other.MaxRetries
+	}
+
+	if other.Retryer != nil {
+		dst.Retryer = other.Retryer
+	}
+
+	if other.DisableParamValidation != nil {
+		dst.DisableParamValidation = other.DisableParamValidation
+	}
+
+	if other.DisableComputeChecksums != nil {
+		dst.DisableComputeChecksums = other.DisableComputeChecksums
+	}
+
+	if other.S3ForcePathStyle != nil {
+		dst.S3ForcePathStyle = other.S3ForcePathStyle
+	}
+
+	if other.S3Disable100Continue != nil {
+		dst.S3Disable100Continue = other.S3Disable100Continue
+	}
+
+	if other.S3UseAccelerate != nil {
+		dst.S3UseAccelerate = other.S3UseAccelerate
+	}
+
+	if other.S3DisableContentMD5Validation != nil {
+		dst.S3DisableContentMD5Validation = other.S3DisableContentMD5Validation
+	}
+
+	if other.UseDualStack != nil {
+		dst.UseDualStack = other.UseDualStack
+	}
+
+	if other.EC2MetadataDisableTimeoutOverride != nil {
+		dst.EC2MetadataDisableTimeoutOverride = other.EC2MetadataDisableTimeoutOverride
+	}
+
+	if other.SleepDelay != nil {
+		dst.SleepDelay = other.SleepDelay
+	}
+
+	if other.DisableRestProtocolURICleaning != nil {
+		dst.DisableRestProtocolURICleaning = other.DisableRestProtocolURICleaning
+	}
+
+	if other.EnforceShouldRetryCheck != nil {
+		dst.EnforceShouldRetryCheck = other.EnforceShouldRetryCheck
+	}
+
+	if other.EnableEndpointDiscovery != nil {
+		dst.EnableEndpointDiscovery = other.EnableEndpointDiscovery
+	}
+
+	if other.DisableEndpointHostPrefix != nil {
+		dst.DisableEndpointHostPrefix = other.DisableEndpointHostPrefix
+	}
+}
+
+// Copy will return a shallow copy of the Config object. If any additional
+// configurations are provided they will be merged into the new config returned.
+func (c *Config) Copy(cfgs ...*Config) *Config {
+	dst := &Config{}
+	dst.MergeIn(c)
+
+	for _, cfg := range cfgs {
+		dst.MergeIn(cfg)
+	}
+
+	return dst
+}

vendor/github.com/aws/aws-sdk-go/aws/context_1_5.go

@@ -0,0 +1,37 @@
+// +build !go1.9
+
+package aws
+
+import "time"
+
+// Context is an copy of the Go v1.7 stdlib's context.Context interface.
+// It is represented as a SDK interface to enable you to use the "WithContext"
+// API methods with Go v1.6 and a Context type such as golang.org/x/net/context.
+//
+// See https://golang.org/pkg/context on how to use contexts.
+type Context interface {
+	// Deadline returns the time when work done on behalf of this context
+	// should be canceled. Deadline returns ok==false when no deadline is
+	// set. Successive calls to Deadline return the same results.
+	Deadline() (deadline time.Time, ok bool)
+
+	// Done returns a channel that's closed when work done on behalf of this
+	// context should be canceled. Done may return nil if this context can
+	// never be canceled. Successive calls to Done return the same value.
+	Done() <-chan struct{}
+
+	// Err returns a non-nil error value after Done is closed. Err returns
+	// Canceled if the context was canceled or DeadlineExceeded if the
+	// context's deadline passed. No other values for Err are defined.
+	// After Done is closed, successive calls to Err return the same value.
+	Err() error
+
+	// Value returns the value associated with this context for key, or nil
+	// if no value is associated with key. Successive calls to Value with
+	// the same key returns the same result.
+	//
+	// Use context values only for request-scoped data that transits
+	// processes and API boundaries, not for passing optional parameters to
+	// functions.
+	Value(key interface{}) interface{}
+}

vendor/github.com/aws/aws-sdk-go/aws/context_1_9.go

@@ -0,0 +1,11 @@
+// +build go1.9
+
+package aws
+
+import "context"
+
+// Context is an alias of the Go stdlib's context.Context interface.
+// It can be used within the SDK's API operation "WithContext" methods.
+//
+// See https://golang.org/pkg/context on how to use contexts.
+type Context = context.Context

vendor/github.com/aws/aws-sdk-go/aws/context_background_1_5.go

@@ -0,0 +1,56 @@
+// +build !go1.7
+
+package aws
+
+import "time"
+
+// An emptyCtx is a copy of the Go 1.7 context.emptyCtx type. This is copied to
+// provide a 1.6 and 1.5 safe version of context that is compatible with Go
+// 1.7's Context.
+//
+// An emptyCtx is never canceled, has no values, and has no deadline. It is not
+// struct{}, since vars of this type must have distinct addresses.
+type emptyCtx int
+
+func (*emptyCtx) Deadline() (deadline time.Time, ok bool) {
+	return
+}
+
+func (*emptyCtx) Done() <-chan struct{} {
+	return nil
+}
+
+func (*emptyCtx) Err() error {
+	return nil
+}
+
+func (*emptyCtx) Value(key interface{}) interface{} {
+	return nil
+}
+
+func (e *emptyCtx) String() string {
+	switch e {
+	case backgroundCtx:
+		return "aws.BackgroundContext"
+	}
+	return "unknown empty Context"
+}
+
+var (
+	backgroundCtx = new(emptyCtx)
+)
+
+// BackgroundContext returns a context that will never be canceled, has no
+// values, and no deadline. This context is used by the SDK to provide
+// backwards compatibility with non-context API operations and functionality.
+//
+// Go 1.6 and before:
+// This context function is equivalent to context.Background in the Go stdlib.
+//
+// Go 1.7 and later:
+// The context returned will be the value returned by context.Background()
+//
+// See https://golang.org/pkg/context for more information on Contexts.
+func BackgroundContext() Context {
+	return backgroundCtx
+}

vendor/github.com/aws/aws-sdk-go/aws/context_background_1_7.go

@@ -0,0 +1,20 @@
+// +build go1.7
+
+package aws
+
+import "context"
+
+// BackgroundContext returns a context that will never be canceled, has no
+// values, and no deadline. This context is used by the SDK to provide
+// backwards compatibility with non-context API operations and functionality.
+//
+// Go 1.6 and before:
+// This context function is equivalent to context.Background in the Go stdlib.
+//
+// Go 1.7 and later:
+// The context returned will be the value returned by context.Background()
+//
+// See https://golang.org/pkg/context for more information on Contexts.
+func BackgroundContext() Context {
+	return context.Background()
+}

vendor/github.com/aws/aws-sdk-go/aws/context_sleep.go

@@ -0,0 +1,24 @@
+package aws
+
+import (
+	"time"
+)
+
+// SleepWithContext will wait for the timer duration to expire, or the context
+// is canceled. Which ever happens first. If the context is canceled the Context's
+// error will be returned.
+//
+// Expects Context to always return a non-nil error if the Done channel is closed.
+func SleepWithContext(ctx Context, dur time.Duration) error {
+	t := time.NewTimer(dur)
+	defer t.Stop()
+
+	select {
+	case <-t.C:
+		break
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+
+	return nil
+}

vendor/github.com/aws/aws-sdk-go/aws/convert_types.go

@@ -0,0 +1,387 @@
+package aws
+
+import "time"
+
+// String returns a pointer to the string value passed in.
+func String(v string) *string {
+	return &v
+}
+
+// StringValue returns the value of the string pointer passed in or
+// "" if the pointer is nil.
+func StringValue(v *string) string {
+	if v != nil {
+		return *v
+	}
+	return ""
+}
+
+// StringSlice converts a slice of string values into a slice of
+// string pointers
+func StringSlice(src []string) []*string {
+	dst := make([]*string, len(src))
+	for i := 0; i < len(src); i++ {
+		dst[i] = &(src[i])
+	}
+	return dst
+}
+
+// StringValueSlice converts a slice of string pointers into a slice of
+// string values
+func StringValueSlice(src []*string) []string {
+	dst := make([]string, len(src))
+	for i := 0; i < len(src); i++ {
+		if src[i] != nil {
+			dst[i] = *(src[i])
+		}
+	}
+	return dst
+}
+
+// StringMap converts a string map of string values into a string
+// map of string pointers
+func StringMap(src map[string]string) map[string]*string {
+	dst := make(map[string]*string)
+	for k, val := range src {
+		v := val
+		dst[k] = &v
+	}
+	return dst
+}
+
+// StringValueMap converts a string map of string pointers into a string
+// map of string values
+func StringValueMap(src map[string]*string) map[string]string {
+	dst := make(map[string]string)
+	for k, val := range src {
+		if val != nil {
+			dst[k] = *val
+		}
+	}
+	return dst
+}
+
+// Bool returns a pointer to the bool value passed in.
+func Bool(v bool) *bool {
+	return &v
+}
+
+// BoolValue returns the value of the bool pointer passed in or
+// false if the pointer is nil.
+func BoolValue(v *bool) bool {
+	if v != nil {
+		return *v
+	}
+	return false
+}
+
+// BoolSlice converts a slice of bool values into a slice of
+// bool pointers
+func BoolSlice(src []bool) []*bool {
+	dst := make([]*bool, len(src))
+	for i := 0; i < len(src); i++ {
+		dst[i] = &(src[i])
+	}
+	return dst
+}
+
+// BoolValueSlice converts a slice of bool pointers into a slice of
+// bool values
+func BoolValueSlice(src []*bool) []bool {
+	dst := make([]bool, len(src))
+	for i := 0; i < len(src); i++ {
+		if src[i] != nil {
+			dst[i] = *(src[i])
+		}
+	}
+	return dst
+}
+
+// BoolMap converts a string map of bool values into a string
+// map of bool pointers
+func BoolMap(src map[string]bool) map[string]*bool {
+	dst := make(map[string]*bool)
+	for k, val := range src {
+		v := val
+		dst[k] = &v
+	}
+	return dst
+}
+
+// BoolValueMap converts a string map of bool pointers into a string
+// map of bool values
+func BoolValueMap(src map[string]*bool) map[string]bool {
+	dst := make(map[string]bool)
+	for k, val := range src {
+		if val != nil {
+			dst[k] = *val
+		}
+	}
+	return dst
+}
+
+// Int returns a pointer to the int value passed in.
+func Int(v int) *int {
+	return &v
+}
+
+// IntValue returns the value of the int pointer passed in or
+// 0 if the pointer is nil.
+func IntValue(v *int) int {
+	if v != nil {
+		return *v
+	}
+	return 0
+}
+
+// IntSlice converts a slice of int values into a slice of
+// int pointers
+func IntSlice(src []int) []*int {
+	dst := make([]*int, len(src))
+	for i := 0; i < len(src); i++ {
+		dst[i] = &(src[i])
+	}
+	return dst
+}
+
+// IntValueSlice converts a slice of int pointers into a slice of
+// int values
+func IntValueSlice(src []*int) []int {
+	dst := make([]int, len(src))
+	for i := 0; i < len(src); i++ {
+		if src[i] != nil {
+			dst[i] = *(src[i])
+		}
+	}
+	return dst
+}
+
+// IntMap converts a string map of int values into a string
+// map of int pointers
+func IntMap(src map[string]int) map[string]*int {
+	dst := make(map[string]*int)
+	for k, val := range src {
+		v := val
+		dst[k] = &v
+	}
+	return dst
+}
+
+// IntValueMap converts a string map of int pointers into a string
+// map of int values
+func IntValueMap(src map[string]*int) map[string]int {
+	dst := make(map[string]int)
+	for k, val := range src {
+		if val != nil {
+			dst[k] = *val
+		}
+	}
+	return dst
+}
+
+// Int64 returns a pointer to the int64 value passed in.
+func Int64(v int64) *int64 {
+	return &v
+}
+
+// Int64Value returns the value of the int64 pointer passed in or
+// 0 if the pointer is nil.
+func Int64Value(v *int64) int64 {
+	if v != nil {
+		return *v
+	}
+	return 0
+}
+
+// Int64Slice converts a slice of int64 values into a slice of
+// int64 pointers
+func Int64Slice(src []int64) []*int64 {
+	dst := make([]*int64, len(src))
+	for i := 0; i < len(src); i++ {
+		dst[i] = &(src[i])
+	}
+	return dst
+}
+
+// Int64ValueSlice converts a slice of int64 pointers into a slice of
+// int64 values
+func Int64ValueSlice(src []*int64) []int64 {
+	dst := make([]int64, len(src))
+	for i := 0; i < len(src); i++ {
+		if src[i] != nil {
+			dst[i] = *(src[i])
+		}
+	}
+	return dst
+}
+
+// Int64Map converts a string map of int64 values into a string
+// map of int64 pointers
+func Int64Map(src map[string]int64) map[string]*int64 {
+	dst := make(map[string]*int64)
+	for k, val := range src {
+		v := val
+		dst[k] = &v
+	}
+	return dst
+}
+
+// Int64ValueMap converts a string map of int64 pointers into a string
+// map of int64 values
+func Int64ValueMap(src map[string]*int64) map[string]int64 {
+	dst := make(map[string]int64)
+	for k, val := range src {
+		if val != nil {
+			dst[k] = *val
+		}
+	}
+	return dst
+}
+
+// Float64 returns a pointer to the float64 value passed in.
+func Float64(v float64) *float64 {
+	return &v
+}
+
+// Float64Value returns the value of the float64 pointer passed in or
+// 0 if the pointer is nil.
+func Float64Value(v *float64) float64 {
+	if v != nil {
+		return *v
+	}
+	return 0
+}
+
+// Float64Slice converts a slice of float64 values into a slice of
+// float64 pointers
+func Float64Slice(src []float64) []*float64 {
+	dst := make([]*float64, len(src))
+	for i := 0; i < len(src); i++ {
+		dst[i] = &(src[i])
+	}
+	return dst
+}
+
+// Float64ValueSlice converts a slice of float64 pointers into a slice of
+// float64 values
+func Float64ValueSlice(src []*float64) []float64 {
+	dst := make([]float64, len(src))
+	for i := 0; i < len(src); i++ {
+		if src[i] != nil {
+			dst[i] = *(src[i])
+		}
+	}
+	return dst
+}
+
+// Float64Map converts a string map of float64 values into a string
+// map of float64 pointers
+func Float64Map(src map[string]float64) map[string]*float64 {
+	dst := make(map[string]*float64)
+	for k, val := range src {
+		v := val
+		dst[k] = &v
+	}
+	return dst
+}
+
+// Float64ValueMap converts a string map of float64 pointers into a string
+// map of float64 values
+func Float64ValueMap(src map[string]*float64) map[string]float64 {
+	dst := make(map[string]float64)
+	for k, val := range src {
+		if val != nil {
+			dst[k] = *val
+		}
+	}
+	return dst
+}
+
+// Time returns a pointer to the time.Time value passed in.
+func Time(v time.Time) *time.Time {
+	return &v
+}
+
+// TimeValue returns the value of the time.Time pointer passed in or
+// time.Time{} if the pointer is nil.
+func TimeValue(v *time.Time) time.Time {
+	if v != nil {
+		return *v
+	}
+	return time.Time{}
+}
+
+// SecondsTimeValue converts an int64 pointer to a time.Time value
+// representing seconds since Epoch or time.Time{} if the pointer is nil.
+func SecondsTimeValue(v *int64) time.Time {
+	if v != nil {
+		return time.Unix((*v / 1000), 0)
+	}
+	return time.Time{}
+}
+
+// MillisecondsTimeValue converts an int64 pointer to a time.Time value
+// representing milliseconds sinch Epoch or time.Time{} if the pointer is nil.
+func MillisecondsTimeValue(v *int64) time.Time {
+	if v != nil {
+		return time.Unix(0, (*v * 1000000))
+	}
+	return time.Time{}
+}
+
+// TimeUnixMilli returns a Unix timestamp in milliseconds from "January 1, 1970 UTC".
+// The result is undefined if the Unix time cannot be represented by an int64.
+// Which includes calling TimeUnixMilli on a zero Time is undefined.
+//
+// This utility is useful for service API's such as CloudWatch Logs which require
+// their unix time values to be in milliseconds.
+//
+// See Go stdlib https://golang.org/pkg/time/#Time.UnixNano for more information.
+func TimeUnixMilli(t time.Time) int64 {
+	return t.UnixNano() / int64(time.Millisecond/time.Nanosecond)
+}
+
+// TimeSlice converts a slice of time.Time values into a slice of
+// time.Time pointers
+func TimeSlice(src []time.Time) []*time.Time {
+	dst := make([]*time.Time, len(src))
+	for i := 0; i < len(src); i++ {
+		dst[i] = &(src[i])
+	}
+	return dst
+}
+
+// TimeValueSlice converts a slice of time.Time pointers into a slice of
+// time.Time values
+func TimeValueSlice(src []*time.Time) []time.Time {
+	dst := make([]time.Time, len(src))
+	for i := 0; i < len(src); i++ {
+		if src[i] != nil {
+			dst[i] = *(src[i])
+		}
+	}
+	return dst
+}
+
+// TimeMap converts a string map of time.Time values into a string
+// map of time.Time pointers
+func TimeMap(src map[string]time.Time) map[string]*time.Time {
+	dst := make(map[string]*time.Time)
+	for k, val := range src {
+		v := val
+		dst[k] = &v
+	}
+	return dst
+}
+
+// TimeValueMap converts a string map of time.Time pointers into a string
+// map of time.Time values
+func TimeValueMap(src map[string]*time.Time) map[string]time.Time {
+	dst := make(map[string]time.Time)
+	for k, val := range src {
+		if val != nil {
+			dst[k] = *val
+		}
+	}
+	return dst
+}

vendor/github.com/aws/aws-sdk-go/aws/corehandlers/handlers.go

@@ -0,0 +1,230 @@
+package corehandlers
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strconv"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+// Interface for matching types which also have a Len method.
+type lener interface {
+	Len() int
+}
+
+// BuildContentLengthHandler builds the content length of a request based on the body,
+// or will use the HTTPRequest.Header's "Content-Length" if defined. If unable
+// to determine request body length and no "Content-Length" was specified it will panic.
+//
+// The Content-Length will only be added to the request if the length of the body
+// is greater than 0. If the body is empty or the current `Content-Length`
+// header is <= 0, the header will also be stripped.
+var BuildContentLengthHandler = request.NamedHandler{Name: "core.BuildContentLengthHandler", Fn: func(r *request.Request) {
+	var length int64
+
+	if slength := r.HTTPRequest.Header.Get("Content-Length"); slength != "" {
+		length, _ = strconv.ParseInt(slength, 10, 64)
+	} else {
+		if r.Body != nil {
+			var err error
+			length, err = aws.SeekerLen(r.Body)
+			if err != nil {
+				r.Error = awserr.New(request.ErrCodeSerialization, "failed to get request body's length", err)
+				return
+			}
+		}
+	}
+
+	if length > 0 {
+		r.HTTPRequest.ContentLength = length
+		r.HTTPRequest.Header.Set("Content-Length", fmt.Sprintf("%d", length))
+	} else {
+		r.HTTPRequest.ContentLength = 0
+		r.HTTPRequest.Header.Del("Content-Length")
+	}
+}}
+
+var reStatusCode = regexp.MustCompile(`^(\d{3})`)
+
+// ValidateReqSigHandler is a request handler to ensure that the request's
+// signature doesn't expire before it is sent. This can happen when a request
+// is built and signed significantly before it is sent. Or significant delays
+// occur when retrying requests that would cause the signature to expire.
+var ValidateReqSigHandler = request.NamedHandler{
+	Name: "core.ValidateReqSigHandler",
+	Fn: func(r *request.Request) {
+		// Unsigned requests are not signed
+		if r.Config.Credentials == credentials.AnonymousCredentials {
+			return
+		}
+
+		signedTime := r.Time
+		if !r.LastSignedAt.IsZero() {
+			signedTime = r.LastSignedAt
+		}
+
+		// 5 minutes to allow for some clock skew/delays in transmission.
+		// Would be improved with aws/aws-sdk-go#423
+		if signedTime.Add(5 * time.Minute).After(time.Now()) {
+			return
+		}
+
+		fmt.Println("request expired, resigning")
+		r.Sign()
+	},
+}
+
+// SendHandler is a request handler to send service request using HTTP client.
+var SendHandler = request.NamedHandler{
+	Name: "core.SendHandler",
+	Fn: func(r *request.Request) {
+		sender := sendFollowRedirects
+		if r.DisableFollowRedirects {
+			sender = sendWithoutFollowRedirects
+		}
+
+		if request.NoBody == r.HTTPRequest.Body {
+			// Strip off the request body if the NoBody reader was used as a
+			// place holder for a request body. This prevents the SDK from
+			// making requests with a request body when it would be invalid
+			// to do so.
+			//
+			// Use a shallow copy of the http.Request to ensure the race condition
+			// of transport on Body will not trigger
+			reqOrig, reqCopy := r.HTTPRequest, *r.HTTPRequest
+			reqCopy.Body = nil
+			r.HTTPRequest = &reqCopy
+			defer func() {
+				r.HTTPRequest = reqOrig
+			}()
+		}
+
+		var err error
+		r.HTTPResponse, err = sender(r)
+		if err != nil {
+			handleSendError(r, err)
+		}
+	},
+}
+
+func sendFollowRedirects(r *request.Request) (*http.Response, error) {
+	return r.Config.HTTPClient.Do(r.HTTPRequest)
+}
+
+func sendWithoutFollowRedirects(r *request.Request) (*http.Response, error) {
+	transport := r.Config.HTTPClient.Transport
+	if transport == nil {
+		transport = http.DefaultTransport
+	}
+
+	return transport.RoundTrip(r.HTTPRequest)
+}
+
+func handleSendError(r *request.Request, err error) {
+	// Prevent leaking if an HTTPResponse was returned. Clean up
+	// the body.
+	if r.HTTPResponse != nil {
+		r.HTTPResponse.Body.Close()
+	}
+	// Capture the case where url.Error is returned for error processing
+	// response. e.g. 301 without location header comes back as string
+	// error and r.HTTPResponse is nil. Other URL redirect errors will
+	// comeback in a similar method.
+	if e, ok := err.(*url.Error); ok && e.Err != nil {
+		if s := reStatusCode.FindStringSubmatch(e.Err.Error()); s != nil {
+			code, _ := strconv.ParseInt(s[1], 10, 64)
+			r.HTTPResponse = &http.Response{
+				StatusCode: int(code),
+				Status:     http.StatusText(int(code)),
+				Body:       ioutil.NopCloser(bytes.NewReader([]byte{})),
+			}
+			return
+		}
+	}
+	if r.HTTPResponse == nil {
+		// Add a dummy request response object to ensure the HTTPResponse
+		// value is consistent.
+		r.HTTPResponse = &http.Response{
+			StatusCode: int(0),
+			Status:     http.StatusText(int(0)),
+			Body:       ioutil.NopCloser(bytes.NewReader([]byte{})),
+		}
+	}
+	// Catch all request errors, and let the default retrier determine
+	// if the error is retryable.
+	r.Error = awserr.New("RequestError", "send request failed", err)
+
+	// Override the error with a context canceled error, if that was canceled.
+	ctx := r.Context()
+	select {
+	case <-ctx.Done():
+		r.Error = awserr.New(request.CanceledErrorCode,
+			"request context canceled", ctx.Err())
+		r.Retryable = aws.Bool(false)
+	default:
+	}
+}
+
+// ValidateResponseHandler is a request handler to validate service response.
+var ValidateResponseHandler = request.NamedHandler{Name: "core.ValidateResponseHandler", Fn: func(r *request.Request) {
+	if r.HTTPResponse.StatusCode == 0 || r.HTTPResponse.StatusCode >= 300 {
+		// this may be replaced by an UnmarshalError handler
+		r.Error = awserr.New("UnknownError", "unknown error", nil)
+	}
+}}
+
+// AfterRetryHandler performs final checks to determine if the request should
+// be retried and how long to delay.
+var AfterRetryHandler = request.NamedHandler{
+	Name: "core.AfterRetryHandler",
+	Fn: func(r *request.Request) {
+		// If one of the other handlers already set the retry state
+		// we don't want to override it based on the service's state
+		if r.Retryable == nil || aws.BoolValue(r.Config.EnforceShouldRetryCheck) {
+			r.Retryable = aws.Bool(r.ShouldRetry(r))
+		}
+
+		if r.WillRetry() {
+			r.RetryDelay = r.RetryRules(r)
+
+			if sleepFn := r.Config.SleepDelay; sleepFn != nil {
+				// Support SleepDelay for backwards compatibility and testing
+				sleepFn(r.RetryDelay)
+			} else if err := aws.SleepWithContext(r.Context(), r.RetryDelay); err != nil {
+				r.Error = awserr.New(request.CanceledErrorCode,
+					"request context canceled", err)
+				r.Retryable = aws.Bool(false)
+				return
+			}
+
+			// when the expired token exception occurs the credentials
+			// need to be expired locally so that the next request to
+			// get credentials will trigger a credentials refresh.
+			if r.IsErrorExpired() {
+				r.Config.Credentials.Expire()
+			}
+
+			r.RetryCount++
+			r.Error = nil
+		}
+	}}
+
+// ValidateEndpointHandler is a request handler to validate a request had the
+// appropriate Region and Endpoint set. Will set r.Error if the endpoint or
+// region is not valid.
+var ValidateEndpointHandler = request.NamedHandler{Name: "core.ValidateEndpointHandler", Fn: func(r *request.Request) {
+	if r.ClientInfo.SigningRegion == "" && aws.StringValue(r.Config.Region) == "" {
+		r.Error = aws.ErrMissingRegion
+	} else if r.ClientInfo.Endpoint == "" {
+		r.Error = aws.ErrMissingEndpoint
+	}
+}}

vendor/github.com/aws/aws-sdk-go/aws/corehandlers/param_validator.go

@@ -0,0 +1,17 @@
+package corehandlers
+
+import "github.com/aws/aws-sdk-go/aws/request"
+
+// ValidateParametersHandler is a request handler to validate the input parameters.
+// Validating parameters only has meaning if done prior to the request being sent.
+var ValidateParametersHandler = request.NamedHandler{Name: "core.ValidateParametersHandler", Fn: func(r *request.Request) {
+	if !r.ParamsFilled() {
+		return
+	}
+
+	if v, ok := r.Params.(request.Validator); ok {
+		if err := v.Validate(); err != nil {
+			r.Error = err
+		}
+	}
+}}

vendor/github.com/aws/aws-sdk-go/aws/corehandlers/user_agent.go

@@ -0,0 +1,37 @@
+package corehandlers
+
+import (
+	"os"
+	"runtime"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+// SDKVersionUserAgentHandler is a request handler for adding the SDK Version
+// to the user agent.
+var SDKVersionUserAgentHandler = request.NamedHandler{
+	Name: "core.SDKVersionUserAgentHandler",
+	Fn: request.MakeAddToUserAgentHandler(aws.SDKName, aws.SDKVersion,
+		runtime.Version(), runtime.GOOS, runtime.GOARCH),
+}
+
+const execEnvVar = `AWS_EXECUTION_ENV`
+const execEnvUAKey = `exec-env`
+
+// AddHostExecEnvUserAgentHander is a request handler appending the SDK's
+// execution environment to the user agent.
+//
+// If the environment variable AWS_EXECUTION_ENV is set, its value will be
+// appended to the user agent string.
+var AddHostExecEnvUserAgentHander = request.NamedHandler{
+	Name: "core.AddHostExecEnvUserAgentHander",
+	Fn: func(r *request.Request) {
+		v := os.Getenv(execEnvVar)
+		if len(v) == 0 {
+			return
+		}
+
+		request.AddToUserAgent(r, execEnvUAKey+"/"+v)
+	},
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/chain_provider.go

@@ -0,0 +1,100 @@
+package credentials
+
+import (
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+var (
+	// ErrNoValidProvidersFoundInChain Is returned when there are no valid
+	// providers in the ChainProvider.
+	//
+	// This has been deprecated. For verbose error messaging set
+	// aws.Config.CredentialsChainVerboseErrors to true.
+	ErrNoValidProvidersFoundInChain = awserr.New("NoCredentialProviders",
+		`no valid providers in chain. Deprecated.
+	For verbose messaging see aws.Config.CredentialsChainVerboseErrors`,
+		nil)
+)
+
+// A ChainProvider will search for a provider which returns credentials
+// and cache that provider until Retrieve is called again.
+//
+// The ChainProvider provides a way of chaining multiple providers together
+// which will pick the first available using priority order of the Providers
+// in the list.
+//
+// If none of the Providers retrieve valid credentials Value, ChainProvider's
+// Retrieve() will return the error ErrNoValidProvidersFoundInChain.
+//
+// If a Provider is found which returns valid credentials Value ChainProvider
+// will cache that Provider for all calls to IsExpired(), until Retrieve is
+// called again.
+//
+// Example of ChainProvider to be used with an EnvProvider and EC2RoleProvider.
+// In this example EnvProvider will first check if any credentials are available
+// via the environment variables. If there are none ChainProvider will check
+// the next Provider in the list, EC2RoleProvider in this case. If EC2RoleProvider
+// does not return any credentials ChainProvider will return the error
+// ErrNoValidProvidersFoundInChain
+//
+//     creds := credentials.NewChainCredentials(
+//         []credentials.Provider{
+//             &credentials.EnvProvider{},
+//             &ec2rolecreds.EC2RoleProvider{
+//                 Client: ec2metadata.New(sess),
+//             },
+//         })
+//
+//     // Usage of ChainCredentials with aws.Config
+//     svc := ec2.New(session.Must(session.NewSession(&aws.Config{
+//       Credentials: creds,
+//     })))
+//
+type ChainProvider struct {
+	Providers     []Provider
+	curr          Provider
+	VerboseErrors bool
+}
+
+// NewChainCredentials returns a pointer to a new Credentials object
+// wrapping a chain of providers.
+func NewChainCredentials(providers []Provider) *Credentials {
+	return NewCredentials(&ChainProvider{
+		Providers: append([]Provider{}, providers...),
+	})
+}
+
+// Retrieve returns the credentials value or error if no provider returned
+// without error.
+//
+// If a provider is found it will be cached and any calls to IsExpired()
+// will return the expired state of the cached provider.
+func (c *ChainProvider) Retrieve() (Value, error) {
+	var errs []error
+	for _, p := range c.Providers {
+		creds, err := p.Retrieve()
+		if err == nil {
+			c.curr = p
+			return creds, nil
+		}
+		errs = append(errs, err)
+	}
+	c.curr = nil
+
+	var err error
+	err = ErrNoValidProvidersFoundInChain
+	if c.VerboseErrors {
+		err = awserr.NewBatchError("NoCredentialProviders", "no valid providers in chain", errs)
+	}
+	return Value{}, err
+}
+
+// IsExpired will returned the expired state of the currently cached provider
+// if there is one.  If there is no current provider, true will be returned.
+func (c *ChainProvider) IsExpired() bool {
+	if c.curr != nil {
+		return c.curr.IsExpired()
+	}
+
+	return true
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/credentials.go

@@ -0,0 +1,299 @@
+// Package credentials provides credential retrieval and management
+//
+// The Credentials is the primary method of getting access to and managing
+// credentials Values. Using dependency injection retrieval of the credential
+// values is handled by a object which satisfies the Provider interface.
+//
+// By default the Credentials.Get() will cache the successful result of a
+// Provider's Retrieve() until Provider.IsExpired() returns true. At which
+// point Credentials will call Provider's Retrieve() to get new credential Value.
+//
+// The Provider is responsible for determining when credentials Value have expired.
+// It is also important to note that Credentials will always call Retrieve the
+// first time Credentials.Get() is called.
+//
+// Example of using the environment variable credentials.
+//
+//     creds := credentials.NewEnvCredentials()
+//
+//     // Retrieve the credentials value
+//     credValue, err := creds.Get()
+//     if err != nil {
+//         // handle error
+//     }
+//
+// Example of forcing credentials to expire and be refreshed on the next Get().
+// This may be helpful to proactively expire credentials and refresh them sooner
+// than they would naturally expire on their own.
+//
+//     creds := credentials.NewCredentials(&ec2rolecreds.EC2RoleProvider{})
+//     creds.Expire()
+//     credsValue, err := creds.Get()
+//     // New credentials will be retrieved instead of from cache.
+//
+//
+// Custom Provider
+//
+// Each Provider built into this package also provides a helper method to generate
+// a Credentials pointer setup with the provider. To use a custom Provider just
+// create a type which satisfies the Provider interface and pass it to the
+// NewCredentials method.
+//
+//     type MyProvider struct{}
+//     func (m *MyProvider) Retrieve() (Value, error) {...}
+//     func (m *MyProvider) IsExpired() bool {...}
+//
+//     creds := credentials.NewCredentials(&MyProvider{})
+//     credValue, err := creds.Get()
+//
+package credentials
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+// AnonymousCredentials is an empty Credential object that can be used as
+// dummy placeholder credentials for requests that do not need signed.
+//
+// This Credentials can be used to configure a service to not sign requests
+// when making service API calls. For example, when accessing public
+// s3 buckets.
+//
+//     svc := s3.New(session.Must(session.NewSession(&aws.Config{
+//       Credentials: credentials.AnonymousCredentials,
+//     })))
+//     // Access public S3 buckets.
+var AnonymousCredentials = NewStaticCredentials("", "", "")
+
+// A Value is the AWS credentials value for individual credential fields.
+type Value struct {
+	// AWS Access key ID
+	AccessKeyID string
+
+	// AWS Secret Access Key
+	SecretAccessKey string
+
+	// AWS Session Token
+	SessionToken string
+
+	// Provider used to get credentials
+	ProviderName string
+}
+
+// HasKeys returns if the credentials Value has both AccessKeyID and
+// SecretAccessKey value set.
+func (v Value) HasKeys() bool {
+	return len(v.AccessKeyID) != 0 && len(v.SecretAccessKey) != 0
+}
+
+// A Provider is the interface for any component which will provide credentials
+// Value. A provider is required to manage its own Expired state, and what to
+// be expired means.
+//
+// The Provider should not need to implement its own mutexes, because
+// that will be managed by Credentials.
+type Provider interface {
+	// Retrieve returns nil if it successfully retrieved the value.
+	// Error is returned if the value were not obtainable, or empty.
+	Retrieve() (Value, error)
+
+	// IsExpired returns if the credentials are no longer valid, and need
+	// to be retrieved.
+	IsExpired() bool
+}
+
+// An Expirer is an interface that Providers can implement to expose the expiration
+// time, if known.  If the Provider cannot accurately provide this info,
+// it should not implement this interface.
+type Expirer interface {
+	// The time at which the credentials are no longer valid
+	ExpiresAt() time.Time
+}
+
+// An ErrorProvider is a stub credentials provider that always returns an error
+// this is used by the SDK when construction a known provider is not possible
+// due to an error.
+type ErrorProvider struct {
+	// The error to be returned from Retrieve
+	Err error
+
+	// The provider name to set on the Retrieved returned Value
+	ProviderName string
+}
+
+// Retrieve will always return the error that the ErrorProvider was created with.
+func (p ErrorProvider) Retrieve() (Value, error) {
+	return Value{ProviderName: p.ProviderName}, p.Err
+}
+
+// IsExpired will always return not expired.
+func (p ErrorProvider) IsExpired() bool {
+	return false
+}
+
+// A Expiry provides shared expiration logic to be used by credentials
+// providers to implement expiry functionality.
+//
+// The best method to use this struct is as an anonymous field within the
+// provider's struct.
+//
+// Example:
+//     type EC2RoleProvider struct {
+//         Expiry
+//         ...
+//     }
+type Expiry struct {
+	// The date/time when to expire on
+	expiration time.Time
+
+	// If set will be used by IsExpired to determine the current time.
+	// Defaults to time.Now if CurrentTime is not set.  Available for testing
+	// to be able to mock out the current time.
+	CurrentTime func() time.Time
+}
+
+// SetExpiration sets the expiration IsExpired will check when called.
+//
+// If window is greater than 0 the expiration time will be reduced by the
+// window value.
+//
+// Using a window is helpful to trigger credentials to expire sooner than
+// the expiration time given to ensure no requests are made with expired
+// tokens.
+func (e *Expiry) SetExpiration(expiration time.Time, window time.Duration) {
+	e.expiration = expiration
+	if window > 0 {
+		e.expiration = e.expiration.Add(-window)
+	}
+}
+
+// IsExpired returns if the credentials are expired.
+func (e *Expiry) IsExpired() bool {
+	curTime := e.CurrentTime
+	if curTime == nil {
+		curTime = time.Now
+	}
+	return e.expiration.Before(curTime())
+}
+
+// ExpiresAt returns the expiration time of the credential
+func (e *Expiry) ExpiresAt() time.Time {
+	return e.expiration
+}
+
+// A Credentials provides concurrency safe retrieval of AWS credentials Value.
+// Credentials will cache the credentials value until they expire. Once the value
+// expires the next Get will attempt to retrieve valid credentials.
+//
+// Credentials is safe to use across multiple goroutines and will manage the
+// synchronous state so the Providers do not need to implement their own
+// synchronization.
+//
+// The first Credentials.Get() will always call Provider.Retrieve() to get the
+// first instance of the credentials Value. All calls to Get() after that
+// will return the cached credentials Value until IsExpired() returns true.
+type Credentials struct {
+	creds        Value
+	forceRefresh bool
+
+	m sync.RWMutex
+
+	provider Provider
+}
+
+// NewCredentials returns a pointer to a new Credentials with the provider set.
+func NewCredentials(provider Provider) *Credentials {
+	return &Credentials{
+		provider:     provider,
+		forceRefresh: true,
+	}
+}
+
+// Get returns the credentials value, or error if the credentials Value failed
+// to be retrieved.
+//
+// Will return the cached credentials Value if it has not expired. If the
+// credentials Value has expired the Provider's Retrieve() will be called
+// to refresh the credentials.
+//
+// If Credentials.Expire() was called the credentials Value will be force
+// expired, and the next call to Get() will cause them to be refreshed.
+func (c *Credentials) Get() (Value, error) {
+	// Check the cached credentials first with just the read lock.
+	c.m.RLock()
+	if !c.isExpired() {
+		creds := c.creds
+		c.m.RUnlock()
+		return creds, nil
+	}
+	c.m.RUnlock()
+
+	// Credentials are expired need to retrieve the credentials taking the full
+	// lock.
+	c.m.Lock()
+	defer c.m.Unlock()
+
+	if c.isExpired() {
+		creds, err := c.provider.Retrieve()
+		if err != nil {
+			return Value{}, err
+		}
+		c.creds = creds
+		c.forceRefresh = false
+	}
+
+	return c.creds, nil
+}
+
+// Expire expires the credentials and forces them to be retrieved on the
+// next call to Get().
+//
+// This will override the Provider's expired state, and force Credentials
+// to call the Provider's Retrieve().
+func (c *Credentials) Expire() {
+	c.m.Lock()
+	defer c.m.Unlock()
+
+	c.forceRefresh = true
+}
+
+// IsExpired returns if the credentials are no longer valid, and need
+// to be retrieved.
+//
+// If the Credentials were forced to be expired with Expire() this will
+// reflect that override.
+func (c *Credentials) IsExpired() bool {
+	c.m.RLock()
+	defer c.m.RUnlock()
+
+	return c.isExpired()
+}
+
+// isExpired helper method wrapping the definition of expired credentials.
+func (c *Credentials) isExpired() bool {
+	return c.forceRefresh || c.provider.IsExpired()
+}
+
+// ExpiresAt provides access to the functionality of the Expirer interface of
+// the underlying Provider, if it supports that interface.  Otherwise, it returns
+// an error.
+func (c *Credentials) ExpiresAt() (time.Time, error) {
+	c.m.RLock()
+	defer c.m.RUnlock()
+
+	expirer, ok := c.provider.(Expirer)
+	if !ok {
+		return time.Time{}, awserr.New("ProviderNotExpirer",
+			fmt.Sprintf("provider %s does not support ExpiresAt()", c.creds.ProviderName),
+			nil)
+	}
+	if c.forceRefresh {
+		// set expiration time to the distant past
+		return time.Time{}, nil
+	}
+	return expirer.ExpiresAt(), nil
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds/ec2_role_provider.go

@@ -0,0 +1,180 @@
+package ec2rolecreds
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/ec2metadata"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/sdkuri"
+)
+
+// ProviderName provides a name of EC2Role provider
+const ProviderName = "EC2RoleProvider"
+
+// A EC2RoleProvider retrieves credentials from the EC2 service, and keeps track if
+// those credentials are expired.
+//
+// Example how to configure the EC2RoleProvider with custom http Client, Endpoint
+// or ExpiryWindow
+//
+//     p := &ec2rolecreds.EC2RoleProvider{
+//         // Pass in a custom timeout to be used when requesting
+//         // IAM EC2 Role credentials.
+//         Client: ec2metadata.New(sess, aws.Config{
+//             HTTPClient: &http.Client{Timeout: 10 * time.Second},
+//         }),
+//
+//         // Do not use early expiry of credentials. If a non zero value is
+//         // specified the credentials will be expired early
+//         ExpiryWindow: 0,
+//     }
+type EC2RoleProvider struct {
+	credentials.Expiry
+
+	// Required EC2Metadata client to use when connecting to EC2 metadata service.
+	Client *ec2metadata.EC2Metadata
+
+	// ExpiryWindow will allow the credentials to trigger refreshing prior to
+	// the credentials actually expiring. This is beneficial so race conditions
+	// with expiring credentials do not cause request to fail unexpectedly
+	// due to ExpiredTokenException exceptions.
+	//
+	// So a ExpiryWindow of 10s would cause calls to IsExpired() to return true
+	// 10 seconds before the credentials are actually expired.
+	//
+	// If ExpiryWindow is 0 or less it will be ignored.
+	ExpiryWindow time.Duration
+}
+
+// NewCredentials returns a pointer to a new Credentials object wrapping
+// the EC2RoleProvider. Takes a ConfigProvider to create a EC2Metadata client.
+// The ConfigProvider is satisfied by the session.Session type.
+func NewCredentials(c client.ConfigProvider, options ...func(*EC2RoleProvider)) *credentials.Credentials {
+	p := &EC2RoleProvider{
+		Client: ec2metadata.New(c),
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return credentials.NewCredentials(p)
+}
+
+// NewCredentialsWithClient returns a pointer to a new Credentials object wrapping
+// the EC2RoleProvider. Takes a EC2Metadata client to use when connecting to EC2
+// metadata service.
+func NewCredentialsWithClient(client *ec2metadata.EC2Metadata, options ...func(*EC2RoleProvider)) *credentials.Credentials {
+	p := &EC2RoleProvider{
+		Client: client,
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return credentials.NewCredentials(p)
+}
+
+// Retrieve retrieves credentials from the EC2 service.
+// Error will be returned if the request fails, or unable to extract
+// the desired credentials.
+func (m *EC2RoleProvider) Retrieve() (credentials.Value, error) {
+	credsList, err := requestCredList(m.Client)
+	if err != nil {
+		return credentials.Value{ProviderName: ProviderName}, err
+	}
+
+	if len(credsList) == 0 {
+		return credentials.Value{ProviderName: ProviderName}, awserr.New("EmptyEC2RoleList", "empty EC2 Role list", nil)
+	}
+	credsName := credsList[0]
+
+	roleCreds, err := requestCred(m.Client, credsName)
+	if err != nil {
+		return credentials.Value{ProviderName: ProviderName}, err
+	}
+
+	m.SetExpiration(roleCreds.Expiration, m.ExpiryWindow)
+
+	return credentials.Value{
+		AccessKeyID:     roleCreds.AccessKeyID,
+		SecretAccessKey: roleCreds.SecretAccessKey,
+		SessionToken:    roleCreds.Token,
+		ProviderName:    ProviderName,
+	}, nil
+}
+
+// A ec2RoleCredRespBody provides the shape for unmarshaling credential
+// request responses.
+type ec2RoleCredRespBody struct {
+	// Success State
+	Expiration      time.Time
+	AccessKeyID     string
+	SecretAccessKey string
+	Token           string
+
+	// Error state
+	Code    string
+	Message string
+}
+
+const iamSecurityCredsPath = "iam/security-credentials/"
+
+// requestCredList requests a list of credentials from the EC2 service.
+// If there are no credentials, or there is an error making or receiving the request
+func requestCredList(client *ec2metadata.EC2Metadata) ([]string, error) {
+	resp, err := client.GetMetadata(iamSecurityCredsPath)
+	if err != nil {
+		return nil, awserr.New("EC2RoleRequestError", "no EC2 instance role found", err)
+	}
+
+	credsList := []string{}
+	s := bufio.NewScanner(strings.NewReader(resp))
+	for s.Scan() {
+		credsList = append(credsList, s.Text())
+	}
+
+	if err := s.Err(); err != nil {
+		return nil, awserr.New(request.ErrCodeSerialization,
+			"failed to read EC2 instance role from metadata service", err)
+	}
+
+	return credsList, nil
+}
+
+// requestCred requests the credentials for a specific credentials from the EC2 service.
+//
+// If the credentials cannot be found, or there is an error reading the response
+// and error will be returned.
+func requestCred(client *ec2metadata.EC2Metadata, credsName string) (ec2RoleCredRespBody, error) {
+	resp, err := client.GetMetadata(sdkuri.PathJoin(iamSecurityCredsPath, credsName))
+	if err != nil {
+		return ec2RoleCredRespBody{},
+			awserr.New("EC2RoleRequestError",
+				fmt.Sprintf("failed to get %s EC2 instance role credentials", credsName),
+				err)
+	}
+
+	respCreds := ec2RoleCredRespBody{}
+	if err := json.NewDecoder(strings.NewReader(resp)).Decode(&respCreds); err != nil {
+		return ec2RoleCredRespBody{},
+			awserr.New(request.ErrCodeSerialization,
+				fmt.Sprintf("failed to decode %s EC2 instance role credentials", credsName),
+				err)
+	}
+
+	if respCreds.Code != "Success" {
+		// If an error code was returned something failed requesting the role.
+		return ec2RoleCredRespBody{}, awserr.New(respCreds.Code, respCreds.Message, nil)
+	}
+
+	return respCreds, nil
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/endpointcreds/provider.go

@@ -0,0 +1,203 @@
+// Package endpointcreds provides support for retrieving credentials from an
+// arbitrary HTTP endpoint.
+//
+// The credentials endpoint Provider can receive both static and refreshable
+// credentials that will expire. Credentials are static when an "Expiration"
+// value is not provided in the endpoint's response.
+//
+// Static credentials will never expire once they have been retrieved. The format
+// of the static credentials response:
+//    {
+//        "AccessKeyId" : "MUA...",
+//        "SecretAccessKey" : "/7PC5om....",
+//    }
+//
+// Refreshable credentials will expire within the "ExpiryWindow" of the Expiration
+// value in the response. The format of the refreshable credentials response:
+//    {
+//        "AccessKeyId" : "MUA...",
+//        "SecretAccessKey" : "/7PC5om....",
+//        "Token" : "AQoDY....=",
+//        "Expiration" : "2016-02-25T06:03:31Z"
+//    }
+//
+// Errors should be returned in the following format and only returned with 400
+// or 500 HTTP status codes.
+//    {
+//        "code": "ErrorCode",
+//        "message": "Helpful error message."
+//    }
+package endpointcreds
+
+import (
+	"encoding/json"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/client/metadata"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/private/protocol/json/jsonutil"
+)
+
+// ProviderName is the name of the credentials provider.
+const ProviderName = `CredentialsEndpointProvider`
+
+// Provider satisfies the credentials.Provider interface, and is a client to
+// retrieve credentials from an arbitrary endpoint.
+type Provider struct {
+	staticCreds bool
+	credentials.Expiry
+
+	// Requires a AWS Client to make HTTP requests to the endpoint with.
+	// the Endpoint the request will be made to is provided by the aws.Config's
+	// Endpoint value.
+	Client *client.Client
+
+	// ExpiryWindow will allow the credentials to trigger refreshing prior to
+	// the credentials actually expiring. This is beneficial so race conditions
+	// with expiring credentials do not cause request to fail unexpectedly
+	// due to ExpiredTokenException exceptions.
+	//
+	// So a ExpiryWindow of 10s would cause calls to IsExpired() to return true
+	// 10 seconds before the credentials are actually expired.
+	//
+	// If ExpiryWindow is 0 or less it will be ignored.
+	ExpiryWindow time.Duration
+
+	// Optional authorization token value if set will be used as the value of
+	// the Authorization header of the endpoint credential request.
+	AuthorizationToken string
+}
+
+// NewProviderClient returns a credentials Provider for retrieving AWS credentials
+// from arbitrary endpoint.
+func NewProviderClient(cfg aws.Config, handlers request.Handlers, endpoint string, options ...func(*Provider)) credentials.Provider {
+	p := &Provider{
+		Client: client.New(
+			cfg,
+			metadata.ClientInfo{
+				ServiceName: "CredentialsEndpoint",
+				Endpoint:    endpoint,
+			},
+			handlers,
+		),
+	}
+
+	p.Client.Handlers.Unmarshal.PushBack(unmarshalHandler)
+	p.Client.Handlers.UnmarshalError.PushBack(unmarshalError)
+	p.Client.Handlers.Validate.Clear()
+	p.Client.Handlers.Validate.PushBack(validateEndpointHandler)
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return p
+}
+
+// NewCredentialsClient returns a pointer to a new Credentials object
+// wrapping the endpoint credentials Provider.
+func NewCredentialsClient(cfg aws.Config, handlers request.Handlers, endpoint string, options ...func(*Provider)) *credentials.Credentials {
+	return credentials.NewCredentials(NewProviderClient(cfg, handlers, endpoint, options...))
+}
+
+// IsExpired returns true if the credentials retrieved are expired, or not yet
+// retrieved.
+func (p *Provider) IsExpired() bool {
+	if p.staticCreds {
+		return false
+	}
+	return p.Expiry.IsExpired()
+}
+
+// Retrieve will attempt to request the credentials from the endpoint the Provider
+// was configured for. And error will be returned if the retrieval fails.
+func (p *Provider) Retrieve() (credentials.Value, error) {
+	resp, err := p.getCredentials()
+	if err != nil {
+		return credentials.Value{ProviderName: ProviderName},
+			awserr.New("CredentialsEndpointError", "failed to load credentials", err)
+	}
+
+	if resp.Expiration != nil {
+		p.SetExpiration(*resp.Expiration, p.ExpiryWindow)
+	} else {
+		p.staticCreds = true
+	}
+
+	return credentials.Value{
+		AccessKeyID:     resp.AccessKeyID,
+		SecretAccessKey: resp.SecretAccessKey,
+		SessionToken:    resp.Token,
+		ProviderName:    ProviderName,
+	}, nil
+}
+
+type getCredentialsOutput struct {
+	Expiration      *time.Time
+	AccessKeyID     string
+	SecretAccessKey string
+	Token           string
+}
+
+type errorOutput struct {
+	Code    string `json:"code"`
+	Message string `json:"message"`
+}
+
+func (p *Provider) getCredentials() (*getCredentialsOutput, error) {
+	op := &request.Operation{
+		Name:       "GetCredentials",
+		HTTPMethod: "GET",
+	}
+
+	out := &getCredentialsOutput{}
+	req := p.Client.NewRequest(op, nil, out)
+	req.HTTPRequest.Header.Set("Accept", "application/json")
+	if authToken := p.AuthorizationToken; len(authToken) != 0 {
+		req.HTTPRequest.Header.Set("Authorization", authToken)
+	}
+
+	return out, req.Send()
+}
+
+func validateEndpointHandler(r *request.Request) {
+	if len(r.ClientInfo.Endpoint) == 0 {
+		r.Error = aws.ErrMissingEndpoint
+	}
+}
+
+func unmarshalHandler(r *request.Request) {
+	defer r.HTTPResponse.Body.Close()
+
+	out := r.Data.(*getCredentialsOutput)
+	if err := json.NewDecoder(r.HTTPResponse.Body).Decode(&out); err != nil {
+		r.Error = awserr.New(request.ErrCodeSerialization,
+			"failed to decode endpoint credentials",
+			err,
+		)
+	}
+}
+
+func unmarshalError(r *request.Request) {
+	defer r.HTTPResponse.Body.Close()
+
+	var errOut errorOutput
+	err := jsonutil.UnmarshalJSONError(&errOut, r.HTTPResponse.Body)
+	if err != nil {
+		r.Error = awserr.NewRequestFailure(
+			awserr.New(request.ErrCodeSerialization,
+				"failed to decode error message", err),
+			r.HTTPResponse.StatusCode,
+			r.RequestID,
+		)
+		return
+	}
+
+	// Response body format is not consistent between metadata endpoints.
+	// Grab the error message as a string and include that as the source error
+	r.Error = awserr.New(errOut.Code, errOut.Message, nil)
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/env_provider.go

@@ -0,0 +1,74 @@
+package credentials
+
+import (
+	"os"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+// EnvProviderName provides a name of Env provider
+const EnvProviderName = "EnvProvider"
+
+var (
+	// ErrAccessKeyIDNotFound is returned when the AWS Access Key ID can't be
+	// found in the process's environment.
+	ErrAccessKeyIDNotFound = awserr.New("EnvAccessKeyNotFound", "AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY not found in environment", nil)
+
+	// ErrSecretAccessKeyNotFound is returned when the AWS Secret Access Key
+	// can't be found in the process's environment.
+	ErrSecretAccessKeyNotFound = awserr.New("EnvSecretNotFound", "AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY not found in environment", nil)
+)
+
+// A EnvProvider retrieves credentials from the environment variables of the
+// running process. Environment credentials never expire.
+//
+// Environment variables used:
+//
+// * Access Key ID:     AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY
+//
+// * Secret Access Key: AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY
+type EnvProvider struct {
+	retrieved bool
+}
+
+// NewEnvCredentials returns a pointer to a new Credentials object
+// wrapping the environment variable provider.
+func NewEnvCredentials() *Credentials {
+	return NewCredentials(&EnvProvider{})
+}
+
+// Retrieve retrieves the keys from the environment.
+func (e *EnvProvider) Retrieve() (Value, error) {
+	e.retrieved = false
+
+	id := os.Getenv("AWS_ACCESS_KEY_ID")
+	if id == "" {
+		id = os.Getenv("AWS_ACCESS_KEY")
+	}
+
+	secret := os.Getenv("AWS_SECRET_ACCESS_KEY")
+	if secret == "" {
+		secret = os.Getenv("AWS_SECRET_KEY")
+	}
+
+	if id == "" {
+		return Value{ProviderName: EnvProviderName}, ErrAccessKeyIDNotFound
+	}
+
+	if secret == "" {
+		return Value{ProviderName: EnvProviderName}, ErrSecretAccessKeyNotFound
+	}
+
+	e.retrieved = true
+	return Value{
+		AccessKeyID:     id,
+		SecretAccessKey: secret,
+		SessionToken:    os.Getenv("AWS_SESSION_TOKEN"),
+		ProviderName:    EnvProviderName,
+	}, nil
+}
+
+// IsExpired returns if the credentials have been retrieved.
+func (e *EnvProvider) IsExpired() bool {
+	return !e.retrieved
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/example.ini

@@ -0,0 +1,12 @@
+[default]
+aws_access_key_id = accessKey
+aws_secret_access_key = secret
+aws_session_token = token
+
+[no_token]
+aws_access_key_id = accessKey
+aws_secret_access_key = secret
+
+[with_colon]
+aws_access_key_id: accessKey
+aws_secret_access_key: secret

vendor/github.com/aws/aws-sdk-go/aws/credentials/processcreds/provider.go

@@ -0,0 +1,425 @@
+/*
+Package processcreds is a credential Provider to retrieve `credential_process`
+credentials.
+
+WARNING: The following describes a method of sourcing credentials from an external
+process. This can potentially be dangerous, so proceed with caution. Other
+credential providers should be preferred if at all possible. If using this
+option, you should make sure that the config file is as locked down as possible
+using security best practices for your operating system.
+
+You can use credentials from a `credential_process` in a variety of ways.
+
+One way is to setup your shared config file, located in the default
+location, with the `credential_process` key and the command you want to be
+called. You also need to set the AWS_SDK_LOAD_CONFIG environment variable
+(e.g., `export AWS_SDK_LOAD_CONFIG=1`) to use the shared config file.
+
+    [default]
+    credential_process = /command/to/call
+
+Creating a new session will use the credential process to retrieve credentials.
+NOTE: If there are credentials in the profile you are using, the credential
+process will not be used.
+
+    // Initialize a session to load credentials.
+    sess, _ := session.NewSession(&aws.Config{
+        Region: aws.String("us-east-1")},
+    )
+
+    // Create S3 service client to use the credentials.
+    svc := s3.New(sess)
+
+Another way to use the `credential_process` method is by using
+`credentials.NewCredentials()` and providing a command to be executed to
+retrieve credentials:
+
+    // Create credentials using the ProcessProvider.
+    creds := processcreds.NewCredentials("/path/to/command")
+
+    // Create service client value configured for credentials.
+    svc := s3.New(sess, &aws.Config{Credentials: creds})
+
+You can set a non-default timeout for the `credential_process` with another
+constructor, `credentials.NewCredentialsTimeout()`, providing the timeout. To
+set a one minute timeout:
+
+    // Create credentials using the ProcessProvider.
+    creds := processcreds.NewCredentialsTimeout(
+        "/path/to/command",
+        time.Duration(500) * time.Millisecond)
+
+If you need more control, you can set any configurable options in the
+credentials using one or more option functions. For example, you can set a two
+minute timeout, a credential duration of 60 minutes, and a maximum stdout
+buffer size of 2k.
+
+    creds := processcreds.NewCredentials(
+        "/path/to/command",
+        func(opt *ProcessProvider) {
+            opt.Timeout = time.Duration(2) * time.Minute
+            opt.Duration = time.Duration(60) * time.Minute
+            opt.MaxBufSize = 2048
+        })
+
+You can also use your own `exec.Cmd`:
+
+	// Create an exec.Cmd
+	myCommand := exec.Command("/path/to/command")
+
+	// Create credentials using your exec.Cmd and custom timeout
+	creds := processcreds.NewCredentialsCommand(
+		myCommand,
+		func(opt *processcreds.ProcessProvider) {
+			opt.Timeout = time.Duration(1) * time.Second
+		})
+*/
+package processcreds
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+)
+
+const (
+	// ProviderName is the name this credentials provider will label any
+	// returned credentials Value with.
+	ProviderName = `ProcessProvider`
+
+	// ErrCodeProcessProviderParse error parsing process output
+	ErrCodeProcessProviderParse = "ProcessProviderParseError"
+
+	// ErrCodeProcessProviderVersion version error in output
+	ErrCodeProcessProviderVersion = "ProcessProviderVersionError"
+
+	// ErrCodeProcessProviderRequired required attribute missing in output
+	ErrCodeProcessProviderRequired = "ProcessProviderRequiredError"
+
+	// ErrCodeProcessProviderExecution execution of command failed
+	ErrCodeProcessProviderExecution = "ProcessProviderExecutionError"
+
+	// errMsgProcessProviderTimeout process took longer than allowed
+	errMsgProcessProviderTimeout = "credential process timed out"
+
+	// errMsgProcessProviderProcess process error
+	errMsgProcessProviderProcess = "error in credential_process"
+
+	// errMsgProcessProviderParse problem parsing output
+	errMsgProcessProviderParse = "parse failed of credential_process output"
+
+	// errMsgProcessProviderVersion version error in output
+	errMsgProcessProviderVersion = "wrong version in process output (not 1)"
+
+	// errMsgProcessProviderMissKey missing access key id in output
+	errMsgProcessProviderMissKey = "missing AccessKeyId in process output"
+
+	// errMsgProcessProviderMissSecret missing secret acess key in output
+	errMsgProcessProviderMissSecret = "missing SecretAccessKey in process output"
+
+	// errMsgProcessProviderPrepareCmd prepare of command failed
+	errMsgProcessProviderPrepareCmd = "failed to prepare command"
+
+	// errMsgProcessProviderEmptyCmd command must not be empty
+	errMsgProcessProviderEmptyCmd = "command must not be empty"
+
+	// errMsgProcessProviderPipe failed to initialize pipe
+	errMsgProcessProviderPipe = "failed to initialize pipe"
+
+	// DefaultDuration is the default amount of time in minutes that the
+	// credentials will be valid for.
+	DefaultDuration = time.Duration(15) * time.Minute
+
+	// DefaultBufSize limits buffer size from growing to an enormous
+	// amount due to a faulty process.
+	DefaultBufSize = 1024
+
+	// DefaultTimeout default limit on time a process can run.
+	DefaultTimeout = time.Duration(1) * time.Minute
+)
+
+// ProcessProvider satisfies the credentials.Provider interface, and is a
+// client to retrieve credentials from a process.
+type ProcessProvider struct {
+	staticCreds bool
+	credentials.Expiry
+	originalCommand []string
+
+	// Expiry duration of the credentials. Defaults to 15 minutes if not set.
+	Duration time.Duration
+
+	// ExpiryWindow will allow the credentials to trigger refreshing prior to
+	// the credentials actually expiring. This is beneficial so race conditions
+	// with expiring credentials do not cause request to fail unexpectedly
+	// due to ExpiredTokenException exceptions.
+	//
+	// So a ExpiryWindow of 10s would cause calls to IsExpired() to return true
+	// 10 seconds before the credentials are actually expired.
+	//
+	// If ExpiryWindow is 0 or less it will be ignored.
+	ExpiryWindow time.Duration
+
+	// A string representing an os command that should return a JSON with
+	// credential information.
+	command *exec.Cmd
+
+	// MaxBufSize limits memory usage from growing to an enormous
+	// amount due to a faulty process.
+	MaxBufSize int
+
+	// Timeout limits the time a process can run.
+	Timeout time.Duration
+}
+
+// NewCredentials returns a pointer to a new Credentials object wrapping the
+// ProcessProvider. The credentials will expire every 15 minutes by default.
+func NewCredentials(command string, options ...func(*ProcessProvider)) *credentials.Credentials {
+	p := &ProcessProvider{
+		command:    exec.Command(command),
+		Duration:   DefaultDuration,
+		Timeout:    DefaultTimeout,
+		MaxBufSize: DefaultBufSize,
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return credentials.NewCredentials(p)
+}
+
+// NewCredentialsTimeout returns a pointer to a new Credentials object with
+// the specified command and timeout, and default duration and max buffer size.
+func NewCredentialsTimeout(command string, timeout time.Duration) *credentials.Credentials {
+	p := NewCredentials(command, func(opt *ProcessProvider) {
+		opt.Timeout = timeout
+	})
+
+	return p
+}
+
+// NewCredentialsCommand returns a pointer to a new Credentials object with
+// the specified command, and default timeout, duration and max buffer size.
+func NewCredentialsCommand(command *exec.Cmd, options ...func(*ProcessProvider)) *credentials.Credentials {
+	p := &ProcessProvider{
+		command:    command,
+		Duration:   DefaultDuration,
+		Timeout:    DefaultTimeout,
+		MaxBufSize: DefaultBufSize,
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return credentials.NewCredentials(p)
+}
+
+type credentialProcessResponse struct {
+	Version         int
+	AccessKeyID     string `json:"AccessKeyId"`
+	SecretAccessKey string
+	SessionToken    string
+	Expiration      *time.Time
+}
+
+// Retrieve executes the 'credential_process' and returns the credentials.
+func (p *ProcessProvider) Retrieve() (credentials.Value, error) {
+	out, err := p.executeCredentialProcess()
+	if err != nil {
+		return credentials.Value{ProviderName: ProviderName}, err
+	}
+
+	// Serialize and validate response
+	resp := &credentialProcessResponse{}
+	if err = json.Unmarshal(out, resp); err != nil {
+		return credentials.Value{ProviderName: ProviderName}, awserr.New(
+			ErrCodeProcessProviderParse,
+			fmt.Sprintf("%s: %s", errMsgProcessProviderParse, string(out)),
+			err)
+	}
+
+	if resp.Version != 1 {
+		return credentials.Value{ProviderName: ProviderName}, awserr.New(
+			ErrCodeProcessProviderVersion,
+			errMsgProcessProviderVersion,
+			nil)
+	}
+
+	if len(resp.AccessKeyID) == 0 {
+		return credentials.Value{ProviderName: ProviderName}, awserr.New(
+			ErrCodeProcessProviderRequired,
+			errMsgProcessProviderMissKey,
+			nil)
+	}
+
+	if len(resp.SecretAccessKey) == 0 {
+		return credentials.Value{ProviderName: ProviderName}, awserr.New(
+			ErrCodeProcessProviderRequired,
+			errMsgProcessProviderMissSecret,
+			nil)
+	}
+
+	// Handle expiration
+	p.staticCreds = resp.Expiration == nil
+	if resp.Expiration != nil {
+		p.SetExpiration(*resp.Expiration, p.ExpiryWindow)
+	}
+
+	return credentials.Value{
+		ProviderName:    ProviderName,
+		AccessKeyID:     resp.AccessKeyID,
+		SecretAccessKey: resp.SecretAccessKey,
+		SessionToken:    resp.SessionToken,
+	}, nil
+}
+
+// IsExpired returns true if the credentials retrieved are expired, or not yet
+// retrieved.
+func (p *ProcessProvider) IsExpired() bool {
+	if p.staticCreds {
+		return false
+	}
+	return p.Expiry.IsExpired()
+}
+
+// prepareCommand prepares the command to be executed.
+func (p *ProcessProvider) prepareCommand() error {
+
+	var cmdArgs []string
+	if runtime.GOOS == "windows" {
+		cmdArgs = []string{"cmd.exe", "/C"}
+	} else {
+		cmdArgs = []string{"sh", "-c"}
+	}
+
+	if len(p.originalCommand) == 0 {
+		p.originalCommand = make([]string, len(p.command.Args))
+		copy(p.originalCommand, p.command.Args)
+
+		// check for empty command because it succeeds
+		if len(strings.TrimSpace(p.originalCommand[0])) < 1 {
+			return awserr.New(
+				ErrCodeProcessProviderExecution,
+				fmt.Sprintf(
+					"%s: %s",
+					errMsgProcessProviderPrepareCmd,
+					errMsgProcessProviderEmptyCmd),
+				nil)
+		}
+	}
+
+	cmdArgs = append(cmdArgs, p.originalCommand...)
+	p.command = exec.Command(cmdArgs[0], cmdArgs[1:]...)
+	p.command.Env = os.Environ()
+
+	return nil
+}
+
+// executeCredentialProcess starts the credential process on the OS and
+// returns the results or an error.
+func (p *ProcessProvider) executeCredentialProcess() ([]byte, error) {
+
+	if err := p.prepareCommand(); err != nil {
+		return nil, err
+	}
+
+	// Setup the pipes
+	outReadPipe, outWritePipe, err := os.Pipe()
+	if err != nil {
+		return nil, awserr.New(
+			ErrCodeProcessProviderExecution,
+			errMsgProcessProviderPipe,
+			err)
+	}
+
+	p.command.Stderr = os.Stderr    // display stderr on console for MFA
+	p.command.Stdout = outWritePipe // get creds json on process's stdout
+	p.command.Stdin = os.Stdin      // enable stdin for MFA
+
+	output := bytes.NewBuffer(make([]byte, 0, p.MaxBufSize))
+
+	stdoutCh := make(chan error, 1)
+	go readInput(
+		io.LimitReader(outReadPipe, int64(p.MaxBufSize)),
+		output,
+		stdoutCh)
+
+	execCh := make(chan error, 1)
+	go executeCommand(*p.command, execCh)
+
+	finished := false
+	var errors []error
+	for !finished {
+		select {
+		case readError := <-stdoutCh:
+			errors = appendError(errors, readError)
+			finished = true
+		case execError := <-execCh:
+			err := outWritePipe.Close()
+			errors = appendError(errors, err)
+			errors = appendError(errors, execError)
+			if errors != nil {
+				return output.Bytes(), awserr.NewBatchError(
+					ErrCodeProcessProviderExecution,
+					errMsgProcessProviderProcess,
+					errors)
+			}
+		case <-time.After(p.Timeout):
+			finished = true
+			return output.Bytes(), awserr.NewBatchError(
+				ErrCodeProcessProviderExecution,
+				errMsgProcessProviderTimeout,
+				errors) // errors can be nil
+		}
+	}
+
+	out := output.Bytes()
+
+	if runtime.GOOS == "windows" {
+		// windows adds slashes to quotes
+		out = []byte(strings.Replace(string(out), `\"`, `"`, -1))
+	}
+
+	return out, nil
+}
+
+// appendError conveniently checks for nil before appending slice
+func appendError(errors []error, err error) []error {
+	if err != nil {
+		return append(errors, err)
+	}
+	return errors
+}
+
+func executeCommand(cmd exec.Cmd, exec chan error) {
+	// Start the command
+	err := cmd.Start()
+	if err == nil {
+		err = cmd.Wait()
+	}
+
+	exec <- err
+}
+
+func readInput(r io.Reader, w io.Writer, read chan error) {
+	tee := io.TeeReader(r, w)
+
+	_, err := ioutil.ReadAll(tee)
+
+	if err == io.EOF {
+		err = nil
+	}
+
+	read <- err // will only arrive here when write end of pipe is closed
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/shared_credentials_provider.go

@@ -0,0 +1,150 @@
+package credentials
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/internal/ini"
+	"github.com/aws/aws-sdk-go/internal/shareddefaults"
+)
+
+// SharedCredsProviderName provides a name of SharedCreds provider
+const SharedCredsProviderName = "SharedCredentialsProvider"
+
+var (
+	// ErrSharedCredentialsHomeNotFound is emitted when the user directory cannot be found.
+	ErrSharedCredentialsHomeNotFound = awserr.New("UserHomeNotFound", "user home directory not found.", nil)
+)
+
+// A SharedCredentialsProvider retrieves credentials from the current user's home
+// directory, and keeps track if those credentials are expired.
+//
+// Profile ini file example: $HOME/.aws/credentials
+type SharedCredentialsProvider struct {
+	// Path to the shared credentials file.
+	//
+	// If empty will look for "AWS_SHARED_CREDENTIALS_FILE" env variable. If the
+	// env value is empty will default to current user's home directory.
+	// Linux/OSX: "$HOME/.aws/credentials"
+	// Windows:   "%USERPROFILE%\.aws\credentials"
+	Filename string
+
+	// AWS Profile to extract credentials from the shared credentials file. If empty
+	// will default to environment variable "AWS_PROFILE" or "default" if
+	// environment variable is also not set.
+	Profile string
+
+	// retrieved states if the credentials have been successfully retrieved.
+	retrieved bool
+}
+
+// NewSharedCredentials returns a pointer to a new Credentials object
+// wrapping the Profile file provider.
+func NewSharedCredentials(filename, profile string) *Credentials {
+	return NewCredentials(&SharedCredentialsProvider{
+		Filename: filename,
+		Profile:  profile,
+	})
+}
+
+// Retrieve reads and extracts the shared credentials from the current
+// users home directory.
+func (p *SharedCredentialsProvider) Retrieve() (Value, error) {
+	p.retrieved = false
+
+	filename, err := p.filename()
+	if err != nil {
+		return Value{ProviderName: SharedCredsProviderName}, err
+	}
+
+	creds, err := loadProfile(filename, p.profile())
+	if err != nil {
+		return Value{ProviderName: SharedCredsProviderName}, err
+	}
+
+	p.retrieved = true
+	return creds, nil
+}
+
+// IsExpired returns if the shared credentials have expired.
+func (p *SharedCredentialsProvider) IsExpired() bool {
+	return !p.retrieved
+}
+
+// loadProfiles loads from the file pointed to by shared credentials filename for profile.
+// The credentials retrieved from the profile will be returned or error. Error will be
+// returned if it fails to read from the file, or the data is invalid.
+func loadProfile(filename, profile string) (Value, error) {
+	config, err := ini.OpenFile(filename)
+	if err != nil {
+		return Value{ProviderName: SharedCredsProviderName}, awserr.New("SharedCredsLoad", "failed to load shared credentials file", err)
+	}
+
+	iniProfile, ok := config.GetSection(profile)
+	if !ok {
+		return Value{ProviderName: SharedCredsProviderName}, awserr.New("SharedCredsLoad", "failed to get profile", nil)
+	}
+
+	id := iniProfile.String("aws_access_key_id")
+	if len(id) == 0 {
+		return Value{ProviderName: SharedCredsProviderName}, awserr.New("SharedCredsAccessKey",
+			fmt.Sprintf("shared credentials %s in %s did not contain aws_access_key_id", profile, filename),
+			nil)
+	}
+
+	secret := iniProfile.String("aws_secret_access_key")
+	if len(secret) == 0 {
+		return Value{ProviderName: SharedCredsProviderName}, awserr.New("SharedCredsSecret",
+			fmt.Sprintf("shared credentials %s in %s did not contain aws_secret_access_key", profile, filename),
+			nil)
+	}
+
+	// Default to empty string if not found
+	token := iniProfile.String("aws_session_token")
+
+	return Value{
+		AccessKeyID:     id,
+		SecretAccessKey: secret,
+		SessionToken:    token,
+		ProviderName:    SharedCredsProviderName,
+	}, nil
+}
+
+// filename returns the filename to use to read AWS shared credentials.
+//
+// Will return an error if the user's home directory path cannot be found.
+func (p *SharedCredentialsProvider) filename() (string, error) {
+	if len(p.Filename) != 0 {
+		return p.Filename, nil
+	}
+
+	if p.Filename = os.Getenv("AWS_SHARED_CREDENTIALS_FILE"); len(p.Filename) != 0 {
+		return p.Filename, nil
+	}
+
+	if home := shareddefaults.UserHomeDir(); len(home) == 0 {
+		// Backwards compatibility of home directly not found error being returned.
+		// This error is too verbose, failure when opening the file would of been
+		// a better error to return.
+		return "", ErrSharedCredentialsHomeNotFound
+	}
+
+	p.Filename = shareddefaults.SharedCredentialsFilename()
+
+	return p.Filename, nil
+}
+
+// profile returns the AWS shared credentials profile.  If empty will read
+// environment variable "AWS_PROFILE". If that is not set profile will
+// return "default".
+func (p *SharedCredentialsProvider) profile() string {
+	if p.Profile == "" {
+		p.Profile = os.Getenv("AWS_PROFILE")
+	}
+	if p.Profile == "" {
+		p.Profile = "default"
+	}
+
+	return p.Profile
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/static_provider.go

@@ -0,0 +1,55 @@
+package credentials
+
+import (
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+// StaticProviderName provides a name of Static provider
+const StaticProviderName = "StaticProvider"
+
+var (
+	// ErrStaticCredentialsEmpty is emitted when static credentials are empty.
+	ErrStaticCredentialsEmpty = awserr.New("EmptyStaticCreds", "static credentials are empty", nil)
+)
+
+// A StaticProvider is a set of credentials which are set programmatically,
+// and will never expire.
+type StaticProvider struct {
+	Value
+}
+
+// NewStaticCredentials returns a pointer to a new Credentials object
+// wrapping a static credentials value provider.
+func NewStaticCredentials(id, secret, token string) *Credentials {
+	return NewCredentials(&StaticProvider{Value: Value{
+		AccessKeyID:     id,
+		SecretAccessKey: secret,
+		SessionToken:    token,
+	}})
+}
+
+// NewStaticCredentialsFromCreds returns a pointer to a new Credentials object
+// wrapping the static credentials value provide. Same as NewStaticCredentials
+// but takes the creds Value instead of individual fields
+func NewStaticCredentialsFromCreds(creds Value) *Credentials {
+	return NewCredentials(&StaticProvider{Value: creds})
+}
+
+// Retrieve returns the credentials or error if the credentials are invalid.
+func (s *StaticProvider) Retrieve() (Value, error) {
+	if s.AccessKeyID == "" || s.SecretAccessKey == "" {
+		return Value{ProviderName: StaticProviderName}, ErrStaticCredentialsEmpty
+	}
+
+	if len(s.Value.ProviderName) == 0 {
+		s.Value.ProviderName = StaticProviderName
+	}
+	return s.Value, nil
+}
+
+// IsExpired returns if the credentials are expired.
+//
+// For StaticProvider, the credentials never expired.
+func (s *StaticProvider) IsExpired() bool {
+	return false
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/stscreds/assume_role_provider.go

@@ -0,0 +1,312 @@
+/*
+Package stscreds are credential Providers to retrieve STS AWS credentials.
+
+STS provides multiple ways to retrieve credentials which can be used when making
+future AWS service API operation calls.
+
+The SDK will ensure that per instance of credentials.Credentials all requests
+to refresh the credentials will be synchronized. But, the SDK is unable to
+ensure synchronous usage of the AssumeRoleProvider if the value is shared
+between multiple Credentials, Sessions or service clients.
+
+Assume Role
+
+To assume an IAM role using STS with the SDK you can create a new Credentials
+with the SDKs's stscreds package.
+
+	// Initial credentials loaded from SDK's default credential chain. Such as
+	// the environment, shared credentials (~/.aws/credentials), or EC2 Instance
+	// Role. These credentials will be used to to make the STS Assume Role API.
+	sess := session.Must(session.NewSession())
+
+	// Create the credentials from AssumeRoleProvider to assume the role
+	// referenced by the "myRoleARN" ARN.
+	creds := stscreds.NewCredentials(sess, "myRoleArn")
+
+	// Create service client value configured for credentials
+	// from assumed role.
+	svc := s3.New(sess, &aws.Config{Credentials: creds})
+
+Assume Role with static MFA Token
+
+To assume an IAM role with a MFA token you can either specify a MFA token code
+directly or provide a function to prompt the user each time the credentials
+need to refresh the role's credentials. Specifying the TokenCode should be used
+for short lived operations that will not need to be refreshed, and when you do
+not want to have direct control over the user provides their MFA token.
+
+With TokenCode the AssumeRoleProvider will be not be able to refresh the role's
+credentials.
+
+	// Create the credentials from AssumeRoleProvider to assume the role
+	// referenced by the "myRoleARN" ARN using the MFA token code provided.
+	creds := stscreds.NewCredentials(sess, "myRoleArn", func(p *stscreds.AssumeRoleProvider) {
+		p.SerialNumber = aws.String("myTokenSerialNumber")
+		p.TokenCode = aws.String("00000000")
+	})
+
+	// Create service client value configured for credentials
+	// from assumed role.
+	svc := s3.New(sess, &aws.Config{Credentials: creds})
+
+Assume Role with MFA Token Provider
+
+To assume an IAM role with MFA for longer running tasks where the credentials
+may need to be refreshed setting the TokenProvider field of AssumeRoleProvider
+will allow the credential provider to prompt for new MFA token code when the
+role's credentials need to be refreshed.
+
+The StdinTokenProvider function is available to prompt on stdin to retrieve
+the MFA token code from the user. You can also implement custom prompts by
+satisfing the TokenProvider function signature.
+
+Using StdinTokenProvider with multiple AssumeRoleProviders, or Credentials will
+have undesirable results as the StdinTokenProvider will not be synchronized. A
+single Credentials with an AssumeRoleProvider can be shared safely.
+
+	// Create the credentials from AssumeRoleProvider to assume the role
+	// referenced by the "myRoleARN" ARN. Prompting for MFA token from stdin.
+	creds := stscreds.NewCredentials(sess, "myRoleArn", func(p *stscreds.AssumeRoleProvider) {
+		p.SerialNumber = aws.String("myTokenSerialNumber")
+		p.TokenProvider = stscreds.StdinTokenProvider
+	})
+
+	// Create service client value configured for credentials
+	// from assumed role.
+	svc := s3.New(sess, &aws.Config{Credentials: creds})
+
+*/
+package stscreds
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/internal/sdkrand"
+	"github.com/aws/aws-sdk-go/service/sts"
+)
+
+// StdinTokenProvider will prompt on stderr and read from stdin for a string value.
+// An error is returned if reading from stdin fails.
+//
+// Use this function go read MFA tokens from stdin. The function makes no attempt
+// to make atomic prompts from stdin across multiple gorouties.
+//
+// Using StdinTokenProvider with multiple AssumeRoleProviders, or Credentials will
+// have undesirable results as the StdinTokenProvider will not be synchronized. A
+// single Credentials with an AssumeRoleProvider can be shared safely
+//
+// Will wait forever until something is provided on the stdin.
+func StdinTokenProvider() (string, error) {
+	var v string
+	fmt.Fprintf(os.Stderr, "Assume Role MFA token code: ")
+	_, err := fmt.Scanln(&v)
+
+	return v, err
+}
+
+// ProviderName provides a name of AssumeRole provider
+const ProviderName = "AssumeRoleProvider"
+
+// AssumeRoler represents the minimal subset of the STS client API used by this provider.
+type AssumeRoler interface {
+	AssumeRole(input *sts.AssumeRoleInput) (*sts.AssumeRoleOutput, error)
+}
+
+// DefaultDuration is the default amount of time in minutes that the credentials
+// will be valid for.
+var DefaultDuration = time.Duration(15) * time.Minute
+
+// AssumeRoleProvider retrieves temporary credentials from the STS service, and
+// keeps track of their expiration time.
+//
+// This credential provider will be used by the SDKs default credential change
+// when shared configuration is enabled, and the shared config or shared credentials
+// file configure assume role. See Session docs for how to do this.
+//
+// AssumeRoleProvider does not provide any synchronization and it is not safe
+// to share this value across multiple Credentials, Sessions, or service clients
+// without also sharing the same Credentials instance.
+type AssumeRoleProvider struct {
+	credentials.Expiry
+
+	// STS client to make assume role request with.
+	Client AssumeRoler
+
+	// Role to be assumed.
+	RoleARN string
+
+	// Session name, if you wish to reuse the credentials elsewhere.
+	RoleSessionName string
+
+	// Expiry duration of the STS credentials. Defaults to 15 minutes if not set.
+	Duration time.Duration
+
+	// Optional ExternalID to pass along, defaults to nil if not set.
+	ExternalID *string
+
+	// The policy plain text must be 2048 bytes or shorter. However, an internal
+	// conversion compresses it into a packed binary format with a separate limit.
+	// The PackedPolicySize response element indicates by percentage how close to
+	// the upper size limit the policy is, with 100% equaling the maximum allowed
+	// size.
+	Policy *string
+
+	// The identification number of the MFA device that is associated with the user
+	// who is making the AssumeRole call. Specify this value if the trust policy
+	// of the role being assumed includes a condition that requires MFA authentication.
+	// The value is either the serial number for a hardware device (such as GAHT12345678)
+	// or an Amazon Resource Name (ARN) for a virtual device (such as arn:aws:iam::123456789012:mfa/user).
+	SerialNumber *string
+
+	// The value provided by the MFA device, if the trust policy of the role being
+	// assumed requires MFA (that is, if the policy includes a condition that tests
+	// for MFA). If the role being assumed requires MFA and if the TokenCode value
+	// is missing or expired, the AssumeRole call returns an "access denied" error.
+	//
+	// If SerialNumber is set and neither TokenCode nor TokenProvider are also
+	// set an error will be returned.
+	TokenCode *string
+
+	// Async method of providing MFA token code for assuming an IAM role with MFA.
+	// The value returned by the function will be used as the TokenCode in the Retrieve
+	// call. See StdinTokenProvider for a provider that prompts and reads from stdin.
+	//
+	// This token provider will be called when ever the assumed role's
+	// credentials need to be refreshed when SerialNumber is also set and
+	// TokenCode is not set.
+	//
+	// If both TokenCode and TokenProvider is set, TokenProvider will be used and
+	// TokenCode is ignored.
+	TokenProvider func() (string, error)
+
+	// ExpiryWindow will allow the credentials to trigger refreshing prior to
+	// the credentials actually expiring. This is beneficial so race conditions
+	// with expiring credentials do not cause request to fail unexpectedly
+	// due to ExpiredTokenException exceptions.
+	//
+	// So a ExpiryWindow of 10s would cause calls to IsExpired() to return true
+	// 10 seconds before the credentials are actually expired.
+	//
+	// If ExpiryWindow is 0 or less it will be ignored.
+	ExpiryWindow time.Duration
+
+	// MaxJitterFrac reduces the effective Duration of each credential requested
+	// by a random percentage between 0 and MaxJitterFraction. MaxJitterFrac must
+	// have a value between 0 and 1. Any other value may lead to expected behavior.
+	// With a MaxJitterFrac value of 0, default) will no jitter will be used.
+	//
+	// For example, with a Duration of 30m and a MaxJitterFrac of 0.1, the
+	// AssumeRole call will be made with an arbitrary Duration between 27m and
+	// 30m.
+	//
+	// MaxJitterFrac should not be negative.
+	MaxJitterFrac float64
+}
+
+// NewCredentials returns a pointer to a new Credentials object wrapping the
+// AssumeRoleProvider. The credentials will expire every 15 minutes and the
+// role will be named after a nanosecond timestamp of this operation.
+//
+// Takes a Config provider to create the STS client. The ConfigProvider is
+// satisfied by the session.Session type.
+//
+// It is safe to share the returned Credentials with multiple Sessions and
+// service clients. All access to the credentials and refreshing them
+// will be synchronized.
+func NewCredentials(c client.ConfigProvider, roleARN string, options ...func(*AssumeRoleProvider)) *credentials.Credentials {
+	p := &AssumeRoleProvider{
+		Client:   sts.New(c),
+		RoleARN:  roleARN,
+		Duration: DefaultDuration,
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return credentials.NewCredentials(p)
+}
+
+// NewCredentialsWithClient returns a pointer to a new Credentials object wrapping the
+// AssumeRoleProvider. The credentials will expire every 15 minutes and the
+// role will be named after a nanosecond timestamp of this operation.
+//
+// Takes an AssumeRoler which can be satisfied by the STS client.
+//
+// It is safe to share the returned Credentials with multiple Sessions and
+// service clients. All access to the credentials and refreshing them
+// will be synchronized.
+func NewCredentialsWithClient(svc AssumeRoler, roleARN string, options ...func(*AssumeRoleProvider)) *credentials.Credentials {
+	p := &AssumeRoleProvider{
+		Client:   svc,
+		RoleARN:  roleARN,
+		Duration: DefaultDuration,
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	return credentials.NewCredentials(p)
+}
+
+// Retrieve generates a new set of temporary credentials using STS.
+func (p *AssumeRoleProvider) Retrieve() (credentials.Value, error) {
+	// Apply defaults where parameters are not set.
+	if p.RoleSessionName == "" {
+		// Try to work out a role name that will hopefully end up unique.
+		p.RoleSessionName = fmt.Sprintf("%d", time.Now().UTC().UnixNano())
+	}
+	if p.Duration == 0 {
+		// Expire as often as AWS permits.
+		p.Duration = DefaultDuration
+	}
+	jitter := time.Duration(sdkrand.SeededRand.Float64() * p.MaxJitterFrac * float64(p.Duration))
+	input := &sts.AssumeRoleInput{
+		DurationSeconds: aws.Int64(int64((p.Duration - jitter) / time.Second)),
+		RoleArn:         aws.String(p.RoleARN),
+		RoleSessionName: aws.String(p.RoleSessionName),
+		ExternalId:      p.ExternalID,
+	}
+	if p.Policy != nil {
+		input.Policy = p.Policy
+	}
+	if p.SerialNumber != nil {
+		if p.TokenCode != nil {
+			input.SerialNumber = p.SerialNumber
+			input.TokenCode = p.TokenCode
+		} else if p.TokenProvider != nil {
+			input.SerialNumber = p.SerialNumber
+			code, err := p.TokenProvider()
+			if err != nil {
+				return credentials.Value{ProviderName: ProviderName}, err
+			}
+			input.TokenCode = aws.String(code)
+		} else {
+			return credentials.Value{ProviderName: ProviderName},
+				awserr.New("AssumeRoleTokenNotAvailable",
+					"assume role with MFA enabled, but neither TokenCode nor TokenProvider are set", nil)
+		}
+	}
+
+	roleOutput, err := p.Client.AssumeRole(input)
+	if err != nil {
+		return credentials.Value{ProviderName: ProviderName}, err
+	}
+
+	// We will proactively generate new credentials before they expire.
+	p.SetExpiration(*roleOutput.Credentials.Expiration, p.ExpiryWindow)
+
+	return credentials.Value{
+		AccessKeyID:     *roleOutput.Credentials.AccessKeyId,
+		SecretAccessKey: *roleOutput.Credentials.SecretAccessKey,
+		SessionToken:    *roleOutput.Credentials.SessionToken,
+		ProviderName:    ProviderName,
+	}, nil
+}

vendor/github.com/aws/aws-sdk-go/aws/credentials/stscreds/web_identity_provider.go

@@ -0,0 +1,100 @@
+package stscreds
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/service/sts"
+	"github.com/aws/aws-sdk-go/service/sts/stsiface"
+)
+
+const (
+	// ErrCodeWebIdentity will be used as an error code when constructing
+	// a new error to be returned during session creation or retrieval.
+	ErrCodeWebIdentity = "WebIdentityErr"
+
+	// WebIdentityProviderName is the web identity provider name
+	WebIdentityProviderName = "WebIdentityCredentials"
+)
+
+// now is used to return a time.Time object representing
+// the current time. This can be used to easily test and
+// compare test values.
+var now = time.Now
+
+// WebIdentityRoleProvider is used to retrieve credentials using
+// an OIDC token.
+type WebIdentityRoleProvider struct {
+	credentials.Expiry
+
+	client       stsiface.STSAPI
+	ExpiryWindow time.Duration
+
+	tokenFilePath   string
+	roleARN         string
+	roleSessionName string
+}
+
+// NewWebIdentityCredentials will return a new set of credentials with a given
+// configuration, role arn, and token file path.
+func NewWebIdentityCredentials(c client.ConfigProvider, roleARN, roleSessionName, path string) *credentials.Credentials {
+	svc := sts.New(c)
+	p := NewWebIdentityRoleProvider(svc, roleARN, roleSessionName, path)
+	return credentials.NewCredentials(p)
+}
+
+// NewWebIdentityRoleProvider will return a new WebIdentityRoleProvider with the
+// provided stsiface.STSAPI
+func NewWebIdentityRoleProvider(svc stsiface.STSAPI, roleARN, roleSessionName, path string) *WebIdentityRoleProvider {
+	return &WebIdentityRoleProvider{
+		client:          svc,
+		tokenFilePath:   path,
+		roleARN:         roleARN,
+		roleSessionName: roleSessionName,
+	}
+}
+
+// Retrieve will attempt to assume a role from a token which is located at
+// 'WebIdentityTokenFilePath' specified destination and if that is empty an
+// error will be returned.
+func (p *WebIdentityRoleProvider) Retrieve() (credentials.Value, error) {
+	b, err := ioutil.ReadFile(p.tokenFilePath)
+	if err != nil {
+		errMsg := fmt.Sprintf("unable to read file at %s", p.tokenFilePath)
+		return credentials.Value{}, awserr.New(ErrCodeWebIdentity, errMsg, err)
+	}
+
+	sessionName := p.roleSessionName
+	if len(sessionName) == 0 {
+		// session name is used to uniquely identify a session. This simply
+		// uses unix time in nanoseconds to uniquely identify sessions.
+		sessionName = strconv.FormatInt(now().UnixNano(), 10)
+	}
+	req, resp := p.client.AssumeRoleWithWebIdentityRequest(&sts.AssumeRoleWithWebIdentityInput{
+		RoleArn:          &p.roleARN,
+		RoleSessionName:  &sessionName,
+		WebIdentityToken: aws.String(string(b)),
+	})
+	// InvalidIdentityToken error is a temporary error that can occur
+	// when assuming an Role with a JWT web identity token.
+	req.RetryErrorCodes = append(req.RetryErrorCodes, sts.ErrCodeInvalidIdentityTokenException)
+	if err := req.Send(); err != nil {
+		return credentials.Value{}, awserr.New(ErrCodeWebIdentity, "failed to retrieve credentials", err)
+	}
+
+	p.SetExpiration(aws.TimeValue(resp.Credentials.Expiration), p.ExpiryWindow)
+
+	value := credentials.Value{
+		AccessKeyID:     aws.StringValue(resp.Credentials.AccessKeyId),
+		SecretAccessKey: aws.StringValue(resp.Credentials.SecretAccessKey),
+		SessionToken:    aws.StringValue(resp.Credentials.SessionToken),
+		ProviderName:    WebIdentityProviderName,
+	}
+	return value, nil
+}

vendor/github.com/aws/aws-sdk-go/aws/csm/doc.go

@@ -0,0 +1,69 @@
+// Package csm provides the Client Side Monitoring (CSM) client which enables
+// sending metrics via UDP connection to the CSM agent. This package provides
+// control options, and configuration for the CSM client. The client can be
+// controlled manually, or automatically via the SDK's Session configuration.
+//
+// Enabling CSM client via SDK's Session configuration
+//
+// The CSM client can be enabled automatically via SDK's Session configuration.
+// The SDK's session configuration enables the CSM client if the AWS_CSM_PORT
+// environment variable is set to a non-empty value.
+//
+// The configuration options for the CSM client via the SDK's session
+// configuration are:
+//
+//	* AWS_CSM_PORT=<port number>
+//	  The port number the CSM agent will receive metrics on.
+//
+//	* AWS_CSM_HOST=<hostname or ip>
+//	  The hostname, or IP address the CSM agent will receive metrics on.
+//	  Without port number.
+//
+// Manually enabling the CSM client
+//
+// The CSM client can be started, paused, and resumed manually. The Start
+// function will enable the CSM client to publish metrics to the CSM agent. It
+// is safe to call Start concurrently, but if Start is called additional times
+// with different ClientID or address it will panic.
+//
+//		r, err := csm.Start("clientID", ":31000")
+//		if err != nil {
+//			panic(fmt.Errorf("failed starting CSM:  %v", err))
+//		}
+//
+// When controlling the CSM client manually, you must also inject its request
+// handlers into the SDK's Session configuration for the SDK's API clients to
+// publish metrics.
+//
+//		sess, err := session.NewSession(&aws.Config{})
+//		if err != nil {
+//			panic(fmt.Errorf("failed loading session: %v", err))
+//		}
+//
+//		// Add CSM client's metric publishing request handlers to the SDK's
+//		// Session Configuration.
+//		r.InjectHandlers(&sess.Handlers)
+//
+// Controlling CSM client
+//
+// Once the CSM client has been enabled the Get function will return a Reporter
+// value that you can use to pause and resume the metrics published to the CSM
+// agent. If Get function is called before the reporter is enabled with the
+// Start function or via SDK's Session configuration nil will be returned.
+//
+// The Pause method can be called to stop the CSM client publishing metrics to
+// the CSM agent. The Continue method will resume metric publishing.
+//
+//		// Get the CSM client Reporter.
+//		r := csm.Get()
+//
+//		// Will pause monitoring
+//		r.Pause()
+//		resp, err = client.GetObject(&s3.GetObjectInput{
+//			Bucket: aws.String("bucket"),
+//			Key: aws.String("key"),
+//		})
+//
+//		// Resume monitoring
+//		r.Continue()
+package csm

vendor/github.com/aws/aws-sdk-go/aws/csm/enable.go

@@ -0,0 +1,89 @@
+package csm
+
+import (
+	"fmt"
+	"strings"
+	"sync"
+)
+
+var (
+	lock sync.Mutex
+)
+
+const (
+	// DefaultPort is used when no port is specified.
+	DefaultPort = "31000"
+
+	// DefaultHost is the host that will be used when none is specified.
+	DefaultHost = "127.0.0.1"
+)
+
+// AddressWithDefaults returns a CSM address built from the host and port
+// values. If the host or port is not set, default values will be used
+// instead. If host is "localhost" it will be replaced with "127.0.0.1".
+func AddressWithDefaults(host, port string) string {
+	if len(host) == 0 || strings.EqualFold(host, "localhost") {
+		host = DefaultHost
+	}
+
+	if len(port) == 0 {
+		port = DefaultPort
+	}
+
+	// Only IP6 host can contain a colon
+	if strings.Contains(host, ":") {
+		return "[" + host + "]:" + port
+	}
+
+	return host + ":" + port
+}
+
+// Start will start a long running go routine to capture
+// client side metrics. Calling start multiple time will only
+// start the metric listener once and will panic if a different
+// client ID or port is passed in.
+//
+//		r, err := csm.Start("clientID", "127.0.0.1:31000")
+//		if err != nil {
+//			panic(fmt.Errorf("expected no error, but received %v", err))
+//		}
+//		sess := session.NewSession()
+//		r.InjectHandlers(sess.Handlers)
+//
+//		svc := s3.New(sess)
+//		out, err := svc.GetObject(&s3.GetObjectInput{
+//			Bucket: aws.String("bucket"),
+//			Key: aws.String("key"),
+//		})
+func Start(clientID string, url string) (*Reporter, error) {
+	lock.Lock()
+	defer lock.Unlock()
+
+	if sender == nil {
+		sender = newReporter(clientID, url)
+	} else {
+		if sender.clientID != clientID {
+			panic(fmt.Errorf("inconsistent client IDs. %q was expected, but received %q", sender.clientID, clientID))
+		}
+
+		if sender.url != url {
+			panic(fmt.Errorf("inconsistent URLs. %q was expected, but received %q", sender.url, url))
+		}
+	}
+
+	if err := connect(url); err != nil {
+		sender = nil
+		return nil, err
+	}
+
+	return sender, nil
+}
+
+// Get will return a reporter if one exists, if one does not exist, nil will
+// be returned.
+func Get() *Reporter {
+	lock.Lock()
+	defer lock.Unlock()
+
+	return sender
+}

vendor/github.com/aws/aws-sdk-go/aws/csm/metric.go

@@ -0,0 +1,109 @@
+package csm
+
+import (
+	"strconv"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+)
+
+type metricTime time.Time
+
+func (t metricTime) MarshalJSON() ([]byte, error) {
+	ns := time.Duration(time.Time(t).UnixNano())
+	return []byte(strconv.FormatInt(int64(ns/time.Millisecond), 10)), nil
+}
+
+type metric struct {
+	ClientID  *string     `json:"ClientId,omitempty"`
+	API       *string     `json:"Api,omitempty"`
+	Service   *string     `json:"Service,omitempty"`
+	Timestamp *metricTime `json:"Timestamp,omitempty"`
+	Type      *string     `json:"Type,omitempty"`
+	Version   *int        `json:"Version,omitempty"`
+
+	AttemptCount *int `json:"AttemptCount,omitempty"`
+	Latency      *int `json:"Latency,omitempty"`
+
+	Fqdn           *string `json:"Fqdn,omitempty"`
+	UserAgent      *string `json:"UserAgent,omitempty"`
+	AttemptLatency *int    `json:"AttemptLatency,omitempty"`
+
+	SessionToken   *string `json:"SessionToken,omitempty"`
+	Region         *string `json:"Region,omitempty"`
+	AccessKey      *string `json:"AccessKey,omitempty"`
+	HTTPStatusCode *int    `json:"HttpStatusCode,omitempty"`
+	XAmzID2        *string `json:"XAmzId2,omitempty"`
+	XAmzRequestID  *string `json:"XAmznRequestId,omitempty"`
+
+	AWSException        *string `json:"AwsException,omitempty"`
+	AWSExceptionMessage *string `json:"AwsExceptionMessage,omitempty"`
+	SDKException        *string `json:"SdkException,omitempty"`
+	SDKExceptionMessage *string `json:"SdkExceptionMessage,omitempty"`
+
+	FinalHTTPStatusCode      *int    `json:"FinalHttpStatusCode,omitempty"`
+	FinalAWSException        *string `json:"FinalAwsException,omitempty"`
+	FinalAWSExceptionMessage *string `json:"FinalAwsExceptionMessage,omitempty"`
+	FinalSDKException        *string `json:"FinalSdkException,omitempty"`
+	FinalSDKExceptionMessage *string `json:"FinalSdkExceptionMessage,omitempty"`
+
+	DestinationIP    *string `json:"DestinationIp,omitempty"`
+	ConnectionReused *int    `json:"ConnectionReused,omitempty"`
+
+	AcquireConnectionLatency *int `json:"AcquireConnectionLatency,omitempty"`
+	ConnectLatency           *int `json:"ConnectLatency,omitempty"`
+	RequestLatency           *int `json:"RequestLatency,omitempty"`
+	DNSLatency               *int `json:"DnsLatency,omitempty"`
+	TCPLatency               *int `json:"TcpLatency,omitempty"`
+	SSLLatency               *int `json:"SslLatency,omitempty"`
+
+	MaxRetriesExceeded *int `json:"MaxRetriesExceeded,omitempty"`
+}
+
+func (m *metric) TruncateFields() {
+	m.ClientID = truncateString(m.ClientID, 255)
+	m.UserAgent = truncateString(m.UserAgent, 256)
+
+	m.AWSException = truncateString(m.AWSException, 128)
+	m.AWSExceptionMessage = truncateString(m.AWSExceptionMessage, 512)
+
+	m.SDKException = truncateString(m.SDKException, 128)
+	m.SDKExceptionMessage = truncateString(m.SDKExceptionMessage, 512)
+
+	m.FinalAWSException = truncateString(m.FinalAWSException, 128)
+	m.FinalAWSExceptionMessage = truncateString(m.FinalAWSExceptionMessage, 512)
+
+	m.FinalSDKException = truncateString(m.FinalSDKException, 128)
+	m.FinalSDKExceptionMessage = truncateString(m.FinalSDKExceptionMessage, 512)
+}
+
+func truncateString(v *string, l int) *string {
+	if v != nil && len(*v) > l {
+		nv := (*v)[:l]
+		return &nv
+	}
+
+	return v
+}
+
+func (m *metric) SetException(e metricException) {
+	switch te := e.(type) {
+	case awsException:
+		m.AWSException = aws.String(te.exception)
+		m.AWSExceptionMessage = aws.String(te.message)
+	case sdkException:
+		m.SDKException = aws.String(te.exception)
+		m.SDKExceptionMessage = aws.String(te.message)
+	}
+}
+
+func (m *metric) SetFinalException(e metricException) {
+	switch te := e.(type) {
+	case awsException:
+		m.FinalAWSException = aws.String(te.exception)
+		m.FinalAWSExceptionMessage = aws.String(te.message)
+	case sdkException:
+		m.FinalSDKException = aws.String(te.exception)
+		m.FinalSDKExceptionMessage = aws.String(te.message)
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/csm/metric_chan.go

@@ -0,0 +1,54 @@
+package csm
+
+import (
+	"sync/atomic"
+)
+
+const (
+	runningEnum = iota
+	pausedEnum
+)
+
+var (
+	// MetricsChannelSize of metrics to hold in the channel
+	MetricsChannelSize = 100
+)
+
+type metricChan struct {
+	ch     chan metric
+	paused int64
+}
+
+func newMetricChan(size int) metricChan {
+	return metricChan{
+		ch: make(chan metric, size),
+	}
+}
+
+func (ch *metricChan) Pause() {
+	atomic.StoreInt64(&ch.paused, pausedEnum)
+}
+
+func (ch *metricChan) Continue() {
+	atomic.StoreInt64(&ch.paused, runningEnum)
+}
+
+func (ch *metricChan) IsPaused() bool {
+	v := atomic.LoadInt64(&ch.paused)
+	return v == pausedEnum
+}
+
+// Push will push metrics to the metric channel if the channel
+// is not paused
+func (ch *metricChan) Push(m metric) bool {
+	if ch.IsPaused() {
+		return false
+	}
+
+	select {
+	case ch.ch <- m:
+		return true
+	default:
+		return false
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/csm/metric_exception.go

@@ -0,0 +1,26 @@
+package csm
+
+type metricException interface {
+	Exception() string
+	Message() string
+}
+
+type requestException struct {
+	exception string
+	message   string
+}
+
+func (e requestException) Exception() string {
+	return e.exception
+}
+func (e requestException) Message() string {
+	return e.message
+}
+
+type awsException struct {
+	requestException
+}
+
+type sdkException struct {
+	requestException
+}

vendor/github.com/aws/aws-sdk-go/aws/csm/reporter.go

@@ -0,0 +1,265 @@
+package csm
+
+import (
+	"encoding/json"
+	"net"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+// Reporter will gather metrics of API requests made and
+// send those metrics to the CSM endpoint.
+type Reporter struct {
+	clientID  string
+	url       string
+	conn      net.Conn
+	metricsCh metricChan
+	done      chan struct{}
+}
+
+var (
+	sender *Reporter
+)
+
+func connect(url string) error {
+	const network = "udp"
+	if err := sender.connect(network, url); err != nil {
+		return err
+	}
+
+	if sender.done == nil {
+		sender.done = make(chan struct{})
+		go sender.start()
+	}
+
+	return nil
+}
+
+func newReporter(clientID, url string) *Reporter {
+	return &Reporter{
+		clientID:  clientID,
+		url:       url,
+		metricsCh: newMetricChan(MetricsChannelSize),
+	}
+}
+
+func (rep *Reporter) sendAPICallAttemptMetric(r *request.Request) {
+	if rep == nil {
+		return
+	}
+
+	now := time.Now()
+	creds, _ := r.Config.Credentials.Get()
+
+	m := metric{
+		ClientID:  aws.String(rep.clientID),
+		API:       aws.String(r.Operation.Name),
+		Service:   aws.String(r.ClientInfo.ServiceID),
+		Timestamp: (*metricTime)(&now),
+		UserAgent: aws.String(r.HTTPRequest.Header.Get("User-Agent")),
+		Region:    r.Config.Region,
+		Type:      aws.String("ApiCallAttempt"),
+		Version:   aws.Int(1),
+
+		XAmzRequestID: aws.String(r.RequestID),
+
+		AttemptCount:   aws.Int(r.RetryCount + 1),
+		AttemptLatency: aws.Int(int(now.Sub(r.AttemptTime).Nanoseconds() / int64(time.Millisecond))),
+		AccessKey:      aws.String(creds.AccessKeyID),
+	}
+
+	if r.HTTPResponse != nil {
+		m.HTTPStatusCode = aws.Int(r.HTTPResponse.StatusCode)
+	}
+
+	if r.Error != nil {
+		if awserr, ok := r.Error.(awserr.Error); ok {
+			m.SetException(getMetricException(awserr))
+		}
+	}
+
+	m.TruncateFields()
+	rep.metricsCh.Push(m)
+}
+
+func getMetricException(err awserr.Error) metricException {
+	msg := err.Error()
+	code := err.Code()
+
+	switch code {
+	case "RequestError",
+		request.ErrCodeSerialization,
+		request.CanceledErrorCode:
+		return sdkException{
+			requestException{exception: code, message: msg},
+		}
+	default:
+		return awsException{
+			requestException{exception: code, message: msg},
+		}
+	}
+}
+
+func (rep *Reporter) sendAPICallMetric(r *request.Request) {
+	if rep == nil {
+		return
+	}
+
+	now := time.Now()
+	m := metric{
+		ClientID:           aws.String(rep.clientID),
+		API:                aws.String(r.Operation.Name),
+		Service:            aws.String(r.ClientInfo.ServiceID),
+		Timestamp:          (*metricTime)(&now),
+		UserAgent:          aws.String(r.HTTPRequest.Header.Get("User-Agent")),
+		Type:               aws.String("ApiCall"),
+		AttemptCount:       aws.Int(r.RetryCount + 1),
+		Region:             r.Config.Region,
+		Latency:            aws.Int(int(time.Since(r.Time) / time.Millisecond)),
+		XAmzRequestID:      aws.String(r.RequestID),
+		MaxRetriesExceeded: aws.Int(boolIntValue(r.RetryCount >= r.MaxRetries())),
+	}
+
+	if r.HTTPResponse != nil {
+		m.FinalHTTPStatusCode = aws.Int(r.HTTPResponse.StatusCode)
+	}
+
+	if r.Error != nil {
+		if awserr, ok := r.Error.(awserr.Error); ok {
+			m.SetFinalException(getMetricException(awserr))
+		}
+	}
+
+	m.TruncateFields()
+
+	// TODO: Probably want to figure something out for logging dropped
+	// metrics
+	rep.metricsCh.Push(m)
+}
+
+func (rep *Reporter) connect(network, url string) error {
+	if rep.conn != nil {
+		rep.conn.Close()
+	}
+
+	conn, err := net.Dial(network, url)
+	if err != nil {
+		return awserr.New("UDPError", "Could not connect", err)
+	}
+
+	rep.conn = conn
+
+	return nil
+}
+
+func (rep *Reporter) close() {
+	if rep.done != nil {
+		close(rep.done)
+	}
+
+	rep.metricsCh.Pause()
+}
+
+func (rep *Reporter) start() {
+	defer func() {
+		rep.metricsCh.Pause()
+	}()
+
+	for {
+		select {
+		case <-rep.done:
+			rep.done = nil
+			return
+		case m := <-rep.metricsCh.ch:
+			// TODO: What to do with this error? Probably should just log
+			b, err := json.Marshal(m)
+			if err != nil {
+				continue
+			}
+
+			rep.conn.Write(b)
+		}
+	}
+}
+
+// Pause will pause the metric channel preventing any new metrics from being
+// added. It is safe to call concurrently with other calls to Pause, but if
+// called concurently with Continue can lead to unexpected state.
+func (rep *Reporter) Pause() {
+	lock.Lock()
+	defer lock.Unlock()
+
+	if rep == nil {
+		return
+	}
+
+	rep.close()
+}
+
+// Continue will reopen the metric channel and allow for monitoring to be
+// resumed. It is safe to call concurrently with other calls to Continue, but
+// if called concurently with Pause can lead to unexpected state.
+func (rep *Reporter) Continue() {
+	lock.Lock()
+	defer lock.Unlock()
+	if rep == nil {
+		return
+	}
+
+	if !rep.metricsCh.IsPaused() {
+		return
+	}
+
+	rep.metricsCh.Continue()
+}
+
+// Client side metric handler names
+const (
+	APICallMetricHandlerName        = "awscsm.SendAPICallMetric"
+	APICallAttemptMetricHandlerName = "awscsm.SendAPICallAttemptMetric"
+)
+
+// InjectHandlers will will enable client side metrics and inject the proper
+// handlers to handle how metrics are sent.
+//
+// InjectHandlers is NOT safe to call concurrently. Calling InjectHandlers
+// multiple times may lead to unexpected behavior, (e.g. duplicate metrics).
+//
+//		// Start must be called in order to inject the correct handlers
+//		r, err := csm.Start("clientID", "127.0.0.1:8094")
+//		if err != nil {
+//			panic(fmt.Errorf("expected no error, but received %v", err))
+//		}
+//
+//		sess := session.NewSession()
+//		r.InjectHandlers(&sess.Handlers)
+//
+//		// create a new service client with our client side metric session
+//		svc := s3.New(sess)
+func (rep *Reporter) InjectHandlers(handlers *request.Handlers) {
+	if rep == nil {
+		return
+	}
+
+	handlers.Complete.PushFrontNamed(request.NamedHandler{
+		Name: APICallMetricHandlerName,
+		Fn:   rep.sendAPICallMetric,
+	})
+
+	handlers.CompleteAttempt.PushFrontNamed(request.NamedHandler{
+		Name: APICallAttemptMetricHandlerName,
+		Fn:   rep.sendAPICallAttemptMetric,
+	})
+}
+
+// boolIntValue return 1 for true and 0 for false.
+func boolIntValue(b bool) int {
+	if b {
+		return 1
+	}
+
+	return 0
+}

vendor/github.com/aws/aws-sdk-go/aws/defaults/defaults.go

@@ -0,0 +1,207 @@
+// Package defaults is a collection of helpers to retrieve the SDK's default
+// configuration and handlers.
+//
+// Generally this package shouldn't be used directly, but session.Session
+// instead. This package is useful when you need to reset the defaults
+// of a session or service client to the SDK defaults before setting
+// additional parameters.
+package defaults
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/corehandlers"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
+	"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
+	"github.com/aws/aws-sdk-go/aws/ec2metadata"
+	"github.com/aws/aws-sdk-go/aws/endpoints"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/shareddefaults"
+)
+
+// A Defaults provides a collection of default values for SDK clients.
+type Defaults struct {
+	Config   *aws.Config
+	Handlers request.Handlers
+}
+
+// Get returns the SDK's default values with Config and handlers pre-configured.
+func Get() Defaults {
+	cfg := Config()
+	handlers := Handlers()
+	cfg.Credentials = CredChain(cfg, handlers)
+
+	return Defaults{
+		Config:   cfg,
+		Handlers: handlers,
+	}
+}
+
+// Config returns the default configuration without credentials.
+// To retrieve a config with credentials also included use
+// `defaults.Get().Config` instead.
+//
+// Generally you shouldn't need to use this method directly, but
+// is available if you need to reset the configuration of an
+// existing service client or session.
+func Config() *aws.Config {
+	return aws.NewConfig().
+		WithCredentials(credentials.AnonymousCredentials).
+		WithRegion(os.Getenv("AWS_REGION")).
+		WithHTTPClient(http.DefaultClient).
+		WithMaxRetries(aws.UseServiceDefaultRetries).
+		WithLogger(aws.NewDefaultLogger()).
+		WithLogLevel(aws.LogOff).
+		WithEndpointResolver(endpoints.DefaultResolver())
+}
+
+// Handlers returns the default request handlers.
+//
+// Generally you shouldn't need to use this method directly, but
+// is available if you need to reset the request handlers of an
+// existing service client or session.
+func Handlers() request.Handlers {
+	var handlers request.Handlers
+
+	handlers.Validate.PushBackNamed(corehandlers.ValidateEndpointHandler)
+	handlers.Validate.AfterEachFn = request.HandlerListStopOnError
+	handlers.Build.PushBackNamed(corehandlers.SDKVersionUserAgentHandler)
+	handlers.Build.PushBackNamed(corehandlers.AddHostExecEnvUserAgentHander)
+	handlers.Build.AfterEachFn = request.HandlerListStopOnError
+	handlers.Sign.PushBackNamed(corehandlers.BuildContentLengthHandler)
+	handlers.Send.PushBackNamed(corehandlers.ValidateReqSigHandler)
+	handlers.Send.PushBackNamed(corehandlers.SendHandler)
+	handlers.AfterRetry.PushBackNamed(corehandlers.AfterRetryHandler)
+	handlers.ValidateResponse.PushBackNamed(corehandlers.ValidateResponseHandler)
+
+	return handlers
+}
+
+// CredChain returns the default credential chain.
+//
+// Generally you shouldn't need to use this method directly, but
+// is available if you need to reset the credentials of an
+// existing service client or session's Config.
+func CredChain(cfg *aws.Config, handlers request.Handlers) *credentials.Credentials {
+	return credentials.NewCredentials(&credentials.ChainProvider{
+		VerboseErrors: aws.BoolValue(cfg.CredentialsChainVerboseErrors),
+		Providers:     CredProviders(cfg, handlers),
+	})
+}
+
+// CredProviders returns the slice of providers used in
+// the default credential chain.
+//
+// For applications that need to use some other provider (for example use
+// different  environment variables for legacy reasons) but still fall back
+// on the default chain of providers. This allows that default chaint to be
+// automatically updated
+func CredProviders(cfg *aws.Config, handlers request.Handlers) []credentials.Provider {
+	return []credentials.Provider{
+		&credentials.EnvProvider{},
+		&credentials.SharedCredentialsProvider{Filename: "", Profile: ""},
+		RemoteCredProvider(*cfg, handlers),
+	}
+}
+
+const (
+	httpProviderAuthorizationEnvVar = "AWS_CONTAINER_AUTHORIZATION_TOKEN"
+	httpProviderEnvVar              = "AWS_CONTAINER_CREDENTIALS_FULL_URI"
+)
+
+// RemoteCredProvider returns a credentials provider for the default remote
+// endpoints such as EC2 or ECS Roles.
+func RemoteCredProvider(cfg aws.Config, handlers request.Handlers) credentials.Provider {
+	if u := os.Getenv(httpProviderEnvVar); len(u) > 0 {
+		return localHTTPCredProvider(cfg, handlers, u)
+	}
+
+	if uri := os.Getenv(shareddefaults.ECSCredsProviderEnvVar); len(uri) > 0 {
+		u := fmt.Sprintf("%s%s", shareddefaults.ECSContainerCredentialsURI, uri)
+		return httpCredProvider(cfg, handlers, u)
+	}
+
+	return ec2RoleProvider(cfg, handlers)
+}
+
+var lookupHostFn = net.LookupHost
+
+func isLoopbackHost(host string) (bool, error) {
+	ip := net.ParseIP(host)
+	if ip != nil {
+		return ip.IsLoopback(), nil
+	}
+
+	// Host is not an ip, perform lookup
+	addrs, err := lookupHostFn(host)
+	if err != nil {
+		return false, err
+	}
+	for _, addr := range addrs {
+		if !net.ParseIP(addr).IsLoopback() {
+			return false, nil
+		}
+	}
+
+	return true, nil
+}
+
+func localHTTPCredProvider(cfg aws.Config, handlers request.Handlers, u string) credentials.Provider {
+	var errMsg string
+
+	parsed, err := url.Parse(u)
+	if err != nil {
+		errMsg = fmt.Sprintf("invalid URL, %v", err)
+	} else {
+		host := aws.URLHostname(parsed)
+		if len(host) == 0 {
+			errMsg = "unable to parse host from local HTTP cred provider URL"
+		} else if isLoopback, loopbackErr := isLoopbackHost(host); loopbackErr != nil {
+			errMsg = fmt.Sprintf("failed to resolve host %q, %v", host, loopbackErr)
+		} else if !isLoopback {
+			errMsg = fmt.Sprintf("invalid endpoint host, %q, only loopback hosts are allowed.", host)
+		}
+	}
+
+	if len(errMsg) > 0 {
+		if cfg.Logger != nil {
+			cfg.Logger.Log("Ignoring, HTTP credential provider", errMsg, err)
+		}
+		return credentials.ErrorProvider{
+			Err:          awserr.New("CredentialsEndpointError", errMsg, err),
+			ProviderName: endpointcreds.ProviderName,
+		}
+	}
+
+	return httpCredProvider(cfg, handlers, u)
+}
+
+func httpCredProvider(cfg aws.Config, handlers request.Handlers, u string) credentials.Provider {
+	return endpointcreds.NewProviderClient(cfg, handlers, u,
+		func(p *endpointcreds.Provider) {
+			p.ExpiryWindow = 5 * time.Minute
+			p.AuthorizationToken = os.Getenv(httpProviderAuthorizationEnvVar)
+		},
+	)
+}
+
+func ec2RoleProvider(cfg aws.Config, handlers request.Handlers) credentials.Provider {
+	resolver := cfg.EndpointResolver
+	if resolver == nil {
+		resolver = endpoints.DefaultResolver()
+	}
+
+	e, _ := resolver.EndpointFor(endpoints.Ec2metadataServiceID, "")
+	return &ec2rolecreds.EC2RoleProvider{
+		Client:       ec2metadata.NewClient(cfg, handlers, e.URL, e.SigningRegion),
+		ExpiryWindow: 5 * time.Minute,
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/defaults/shared_config.go

@@ -0,0 +1,27 @@
+package defaults
+
+import (
+	"github.com/aws/aws-sdk-go/internal/shareddefaults"
+)
+
+// SharedCredentialsFilename returns the SDK's default file path
+// for the shared credentials file.
+//
+// Builds the shared config file path based on the OS's platform.
+//
+//   - Linux/Unix: $HOME/.aws/credentials
+//   - Windows: %USERPROFILE%\.aws\credentials
+func SharedCredentialsFilename() string {
+	return shareddefaults.SharedCredentialsFilename()
+}
+
+// SharedConfigFilename returns the SDK's default file path for
+// the shared config file.
+//
+// Builds the shared config file path based on the OS's platform.
+//
+//   - Linux/Unix: $HOME/.aws/config
+//   - Windows: %USERPROFILE%\.aws\config
+func SharedConfigFilename() string {
+	return shareddefaults.SharedConfigFilename()
+}

vendor/github.com/aws/aws-sdk-go/aws/doc.go

@@ -0,0 +1,56 @@
+// Package aws provides the core SDK's utilities and shared types. Use this package's
+// utilities to simplify setting and reading API operations parameters.
+//
+// Value and Pointer Conversion Utilities
+//
+// This package includes a helper conversion utility for each scalar type the SDK's
+// API use. These utilities make getting a pointer of the scalar, and dereferencing
+// a pointer easier.
+//
+// Each conversion utility comes in two forms. Value to Pointer and Pointer to Value.
+// The Pointer to value will safely dereference the pointer and return its value.
+// If the pointer was nil, the scalar's zero value will be returned.
+//
+// The value to pointer functions will be named after the scalar type. So get a
+// *string from a string value use the "String" function. This makes it easy to
+// to get pointer of a literal string value, because getting the address of a
+// literal requires assigning the value to a variable first.
+//
+//    var strPtr *string
+//
+//    // Without the SDK's conversion functions
+//    str := "my string"
+//    strPtr = &str
+//
+//    // With the SDK's conversion functions
+//    strPtr = aws.String("my string")
+//
+//    // Convert *string to string value
+//    str = aws.StringValue(strPtr)
+//
+// In addition to scalars the aws package also includes conversion utilities for
+// map and slice for commonly types used in API parameters. The map and slice
+// conversion functions use similar naming pattern as the scalar conversion
+// functions.
+//
+//    var strPtrs []*string
+//    var strs []string = []string{"Go", "Gophers", "Go"}
+//
+//    // Convert []string to []*string
+//    strPtrs = aws.StringSlice(strs)
+//
+//    // Convert []*string to []string
+//    strs = aws.StringValueSlice(strPtrs)
+//
+// SDK Default HTTP Client
+//
+// The SDK will use the http.DefaultClient if a HTTP client is not provided to
+// the SDK's Session, or service client constructor. This means that if the
+// http.DefaultClient is modified by other components of your application the
+// modifications will be picked up by the SDK as well.
+//
+// In some cases this might be intended, but it is a better practice to create
+// a custom HTTP Client to share explicitly through your application. You can
+// configure the SDK to use the custom HTTP Client by setting the HTTPClient
+// value of the SDK's Config type when creating a Session or service client.
+package aws

vendor/github.com/aws/aws-sdk-go/aws/ec2metadata/api.go

@@ -0,0 +1,169 @@
+package ec2metadata
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/sdkuri"
+)
+
+// GetMetadata uses the path provided to request information from the EC2
+// instance metdata service. The content will be returned as a string, or
+// error if the request failed.
+func (c *EC2Metadata) GetMetadata(p string) (string, error) {
+	op := &request.Operation{
+		Name:       "GetMetadata",
+		HTTPMethod: "GET",
+		HTTPPath:   sdkuri.PathJoin("/meta-data", p),
+	}
+
+	output := &metadataOutput{}
+	req := c.NewRequest(op, nil, output)
+	err := req.Send()
+
+	return output.Content, err
+}
+
+// GetUserData returns the userdata that was configured for the service. If
+// there is no user-data setup for the EC2 instance a "NotFoundError" error
+// code will be returned.
+func (c *EC2Metadata) GetUserData() (string, error) {
+	op := &request.Operation{
+		Name:       "GetUserData",
+		HTTPMethod: "GET",
+		HTTPPath:   "/user-data",
+	}
+
+	output := &metadataOutput{}
+	req := c.NewRequest(op, nil, output)
+	req.Handlers.UnmarshalError.PushBack(func(r *request.Request) {
+		if r.HTTPResponse.StatusCode == http.StatusNotFound {
+			r.Error = awserr.New("NotFoundError", "user-data not found", r.Error)
+		}
+	})
+	err := req.Send()
+
+	return output.Content, err
+}
+
+// GetDynamicData uses the path provided to request information from the EC2
+// instance metadata service for dynamic data. The content will be returned
+// as a string, or error if the request failed.
+func (c *EC2Metadata) GetDynamicData(p string) (string, error) {
+	op := &request.Operation{
+		Name:       "GetDynamicData",
+		HTTPMethod: "GET",
+		HTTPPath:   sdkuri.PathJoin("/dynamic", p),
+	}
+
+	output := &metadataOutput{}
+	req := c.NewRequest(op, nil, output)
+	err := req.Send()
+
+	return output.Content, err
+}
+
+// GetInstanceIdentityDocument retrieves an identity document describing an
+// instance. Error is returned if the request fails or is unable to parse
+// the response.
+func (c *EC2Metadata) GetInstanceIdentityDocument() (EC2InstanceIdentityDocument, error) {
+	resp, err := c.GetDynamicData("instance-identity/document")
+	if err != nil {
+		return EC2InstanceIdentityDocument{},
+			awserr.New("EC2MetadataRequestError",
+				"failed to get EC2 instance identity document", err)
+	}
+
+	doc := EC2InstanceIdentityDocument{}
+	if err := json.NewDecoder(strings.NewReader(resp)).Decode(&doc); err != nil {
+		return EC2InstanceIdentityDocument{},
+			awserr.New(request.ErrCodeSerialization,
+				"failed to decode EC2 instance identity document", err)
+	}
+
+	return doc, nil
+}
+
+// IAMInfo retrieves IAM info from the metadata API
+func (c *EC2Metadata) IAMInfo() (EC2IAMInfo, error) {
+	resp, err := c.GetMetadata("iam/info")
+	if err != nil {
+		return EC2IAMInfo{},
+			awserr.New("EC2MetadataRequestError",
+				"failed to get EC2 IAM info", err)
+	}
+
+	info := EC2IAMInfo{}
+	if err := json.NewDecoder(strings.NewReader(resp)).Decode(&info); err != nil {
+		return EC2IAMInfo{},
+			awserr.New(request.ErrCodeSerialization,
+				"failed to decode EC2 IAM info", err)
+	}
+
+	if info.Code != "Success" {
+		errMsg := fmt.Sprintf("failed to get EC2 IAM Info (%s)", info.Code)
+		return EC2IAMInfo{},
+			awserr.New("EC2MetadataError", errMsg, nil)
+	}
+
+	return info, nil
+}
+
+// Region returns the region the instance is running in.
+func (c *EC2Metadata) Region() (string, error) {
+	resp, err := c.GetMetadata("placement/availability-zone")
+	if err != nil {
+		return "", err
+	}
+
+	if len(resp) == 0 {
+		return "", awserr.New("EC2MetadataError", "invalid Region response", nil)
+	}
+
+	// returns region without the suffix. Eg: us-west-2a becomes us-west-2
+	return resp[:len(resp)-1], nil
+}
+
+// Available returns if the application has access to the EC2 Metadata service.
+// Can be used to determine if application is running within an EC2 Instance and
+// the metadata service is available.
+func (c *EC2Metadata) Available() bool {
+	if _, err := c.GetMetadata("instance-id"); err != nil {
+		return false
+	}
+
+	return true
+}
+
+// An EC2IAMInfo provides the shape for unmarshaling
+// an IAM info from the metadata API
+type EC2IAMInfo struct {
+	Code               string
+	LastUpdated        time.Time
+	InstanceProfileArn string
+	InstanceProfileID  string
+}
+
+// An EC2InstanceIdentityDocument provides the shape for unmarshaling
+// an instance identity document
+type EC2InstanceIdentityDocument struct {
+	DevpayProductCodes []string  `json:"devpayProductCodes"`
+	AvailabilityZone   string    `json:"availabilityZone"`
+	PrivateIP          string    `json:"privateIp"`
+	Version            string    `json:"version"`
+	Region             string    `json:"region"`
+	InstanceID         string    `json:"instanceId"`
+	BillingProducts    []string  `json:"billingProducts"`
+	InstanceType       string    `json:"instanceType"`
+	AccountID          string    `json:"accountId"`
+	PendingTime        time.Time `json:"pendingTime"`
+	ImageID            string    `json:"imageId"`
+	KernelID           string    `json:"kernelId"`
+	RamdiskID          string    `json:"ramdiskId"`
+	Architecture       string    `json:"architecture"`
+}

vendor/github.com/aws/aws-sdk-go/aws/ec2metadata/service.go

@@ -0,0 +1,152 @@
+// Package ec2metadata provides the client for making API calls to the
+// EC2 Metadata service.
+//
+// This package's client can be disabled completely by setting the environment
+// variable "AWS_EC2_METADATA_DISABLED=true". This environment variable set to
+// true instructs the SDK to disable the EC2 Metadata client. The client cannot
+// be used while the environment variable is set to true, (case insensitive).
+package ec2metadata
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/client/metadata"
+	"github.com/aws/aws-sdk-go/aws/corehandlers"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+// ServiceName is the name of the service.
+const ServiceName = "ec2metadata"
+const disableServiceEnvVar = "AWS_EC2_METADATA_DISABLED"
+
+// A EC2Metadata is an EC2 Metadata service Client.
+type EC2Metadata struct {
+	*client.Client
+}
+
+// New creates a new instance of the EC2Metadata client with a session.
+// This client is safe to use across multiple goroutines.
+//
+//
+// Example:
+//     // Create a EC2Metadata client from just a session.
+//     svc := ec2metadata.New(mySession)
+//
+//     // Create a EC2Metadata client with additional configuration
+//     svc := ec2metadata.New(mySession, aws.NewConfig().WithLogLevel(aws.LogDebugHTTPBody))
+func New(p client.ConfigProvider, cfgs ...*aws.Config) *EC2Metadata {
+	c := p.ClientConfig(ServiceName, cfgs...)
+	return NewClient(*c.Config, c.Handlers, c.Endpoint, c.SigningRegion)
+}
+
+// NewClient returns a new EC2Metadata client. Should be used to create
+// a client when not using a session. Generally using just New with a session
+// is preferred.
+//
+// If an unmodified HTTP client is provided from the stdlib default, or no client
+// the EC2RoleProvider's EC2Metadata HTTP client's timeout will be shortened.
+// To disable this set Config.EC2MetadataDisableTimeoutOverride to false. Enabled by default.
+func NewClient(cfg aws.Config, handlers request.Handlers, endpoint, signingRegion string, opts ...func(*client.Client)) *EC2Metadata {
+	if !aws.BoolValue(cfg.EC2MetadataDisableTimeoutOverride) && httpClientZero(cfg.HTTPClient) {
+		// If the http client is unmodified and this feature is not disabled
+		// set custom timeouts for EC2Metadata requests.
+		cfg.HTTPClient = &http.Client{
+			// use a shorter timeout than default because the metadata
+			// service is local if it is running, and to fail faster
+			// if not running on an ec2 instance.
+			Timeout: 5 * time.Second,
+		}
+	}
+
+	svc := &EC2Metadata{
+		Client: client.New(
+			cfg,
+			metadata.ClientInfo{
+				ServiceName: ServiceName,
+				ServiceID:   ServiceName,
+				Endpoint:    endpoint,
+				APIVersion:  "latest",
+			},
+			handlers,
+		),
+	}
+
+	svc.Handlers.Unmarshal.PushBack(unmarshalHandler)
+	svc.Handlers.UnmarshalError.PushBack(unmarshalError)
+	svc.Handlers.Validate.Clear()
+	svc.Handlers.Validate.PushBack(validateEndpointHandler)
+
+	// Disable the EC2 Metadata service if the environment variable is set.
+	// This shortcirctes the service's functionality to always fail to send
+	// requests.
+	if strings.ToLower(os.Getenv(disableServiceEnvVar)) == "true" {
+		svc.Handlers.Send.SwapNamed(request.NamedHandler{
+			Name: corehandlers.SendHandler.Name,
+			Fn: func(r *request.Request) {
+				r.HTTPResponse = &http.Response{
+					Header: http.Header{},
+				}
+				r.Error = awserr.New(
+					request.CanceledErrorCode,
+					"EC2 IMDS access disabled via "+disableServiceEnvVar+" env var",
+					nil)
+			},
+		})
+	}
+
+	// Add additional options to the service config
+	for _, option := range opts {
+		option(svc.Client)
+	}
+
+	return svc
+}
+
+func httpClientZero(c *http.Client) bool {
+	return c == nil || (c.Transport == nil && c.CheckRedirect == nil && c.Jar == nil && c.Timeout == 0)
+}
+
+type metadataOutput struct {
+	Content string
+}
+
+func unmarshalHandler(r *request.Request) {
+	defer r.HTTPResponse.Body.Close()
+	b := &bytes.Buffer{}
+	if _, err := io.Copy(b, r.HTTPResponse.Body); err != nil {
+		r.Error = awserr.New(request.ErrCodeSerialization, "unable to unmarshal EC2 metadata response", err)
+		return
+	}
+
+	if data, ok := r.Data.(*metadataOutput); ok {
+		data.Content = b.String()
+	}
+}
+
+func unmarshalError(r *request.Request) {
+	defer r.HTTPResponse.Body.Close()
+	b := &bytes.Buffer{}
+	if _, err := io.Copy(b, r.HTTPResponse.Body); err != nil {
+		r.Error = awserr.New(request.ErrCodeSerialization, "unable to unmarshal EC2 metadata error response", err)
+		return
+	}
+
+	// Response body format is not consistent between metadata endpoints.
+	// Grab the error message as a string and include that as the source error
+	r.Error = awserr.New("EC2MetadataError", "failed to make EC2Metadata request", errors.New(b.String()))
+}
+
+func validateEndpointHandler(r *request.Request) {
+	if r.ClientInfo.Endpoint == "" {
+		r.Error = aws.ErrMissingEndpoint
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/endpoints/decode.go

@@ -0,0 +1,188 @@
+package endpoints
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+type modelDefinition map[string]json.RawMessage
+
+// A DecodeModelOptions are the options for how the endpoints model definition
+// are decoded.
+type DecodeModelOptions struct {
+	SkipCustomizations bool
+}
+
+// Set combines all of the option functions together.
+func (d *DecodeModelOptions) Set(optFns ...func(*DecodeModelOptions)) {
+	for _, fn := range optFns {
+		fn(d)
+	}
+}
+
+// DecodeModel unmarshals a Regions and Endpoint model definition file into
+// a endpoint Resolver. If the file format is not supported, or an error occurs
+// when unmarshaling the model an error will be returned.
+//
+// Casting the return value of this func to a EnumPartitions will
+// allow you to get a list of the partitions in the order the endpoints
+// will be resolved in.
+//
+//    resolver, err := endpoints.DecodeModel(reader)
+//
+//    partitions := resolver.(endpoints.EnumPartitions).Partitions()
+//    for _, p := range partitions {
+//        // ... inspect partitions
+//    }
+func DecodeModel(r io.Reader, optFns ...func(*DecodeModelOptions)) (Resolver, error) {
+	var opts DecodeModelOptions
+	opts.Set(optFns...)
+
+	// Get the version of the partition file to determine what
+	// unmarshaling model to use.
+	modelDef := modelDefinition{}
+	if err := json.NewDecoder(r).Decode(&modelDef); err != nil {
+		return nil, newDecodeModelError("failed to decode endpoints model", err)
+	}
+
+	var version string
+	if b, ok := modelDef["version"]; ok {
+		version = string(b)
+	} else {
+		return nil, newDecodeModelError("endpoints version not found in model", nil)
+	}
+
+	if version == "3" {
+		return decodeV3Endpoints(modelDef, opts)
+	}
+
+	return nil, newDecodeModelError(
+		fmt.Sprintf("endpoints version %s, not supported", version), nil)
+}
+
+func decodeV3Endpoints(modelDef modelDefinition, opts DecodeModelOptions) (Resolver, error) {
+	b, ok := modelDef["partitions"]
+	if !ok {
+		return nil, newDecodeModelError("endpoints model missing partitions", nil)
+	}
+
+	ps := partitions{}
+	if err := json.Unmarshal(b, &ps); err != nil {
+		return nil, newDecodeModelError("failed to decode endpoints model", err)
+	}
+
+	if opts.SkipCustomizations {
+		return ps, nil
+	}
+
+	// Customization
+	for i := 0; i < len(ps); i++ {
+		p := &ps[i]
+		custAddEC2Metadata(p)
+		custAddS3DualStack(p)
+		custRmIotDataService(p)
+		custFixAppAutoscalingChina(p)
+		custFixAppAutoscalingUsGov(p)
+	}
+
+	return ps, nil
+}
+
+func custAddS3DualStack(p *partition) {
+	if p.ID != "aws" {
+		return
+	}
+
+	custAddDualstack(p, "s3")
+	custAddDualstack(p, "s3-control")
+}
+
+func custAddDualstack(p *partition, svcName string) {
+	s, ok := p.Services[svcName]
+	if !ok {
+		return
+	}
+
+	s.Defaults.HasDualStack = boxedTrue
+	s.Defaults.DualStackHostname = "{service}.dualstack.{region}.{dnsSuffix}"
+
+	p.Services[svcName] = s
+}
+
+func custAddEC2Metadata(p *partition) {
+	p.Services["ec2metadata"] = service{
+		IsRegionalized:    boxedFalse,
+		PartitionEndpoint: "aws-global",
+		Endpoints: endpoints{
+			"aws-global": endpoint{
+				Hostname:  "169.254.169.254/latest",
+				Protocols: []string{"http"},
+			},
+		},
+	}
+}
+
+func custRmIotDataService(p *partition) {
+	delete(p.Services, "data.iot")
+}
+
+func custFixAppAutoscalingChina(p *partition) {
+	if p.ID != "aws-cn" {
+		return
+	}
+
+	const serviceName = "application-autoscaling"
+	s, ok := p.Services[serviceName]
+	if !ok {
+		return
+	}
+
+	const expectHostname = `autoscaling.{region}.amazonaws.com`
+	if e, a := s.Defaults.Hostname, expectHostname; e != a {
+		fmt.Printf("custFixAppAutoscalingChina: ignoring customization, expected %s, got %s\n", e, a)
+		return
+	}
+
+	s.Defaults.Hostname = expectHostname + ".cn"
+	p.Services[serviceName] = s
+}
+
+func custFixAppAutoscalingUsGov(p *partition) {
+	if p.ID != "aws-us-gov" {
+		return
+	}
+
+	const serviceName = "application-autoscaling"
+	s, ok := p.Services[serviceName]
+	if !ok {
+		return
+	}
+
+	if a := s.Defaults.CredentialScope.Service; a != "" {
+		fmt.Printf("custFixAppAutoscalingUsGov: ignoring customization, expected empty credential scope service, got %s\n", a)
+		return
+	}
+
+	if a := s.Defaults.Hostname; a != "" {
+		fmt.Printf("custFixAppAutoscalingUsGov: ignoring customization, expected empty hostname, got %s\n", a)
+		return
+	}
+
+	s.Defaults.CredentialScope.Service = "application-autoscaling"
+	s.Defaults.Hostname = "autoscaling.{region}.amazonaws.com"
+
+	p.Services[serviceName] = s
+}
+
+type decodeModelError struct {
+	awsError
+}
+
+func newDecodeModelError(msg string, err error) decodeModelError {
+	return decodeModelError{
+		awsError: awserr.New("DecodeEndpointsModelError", msg, err),
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/endpoints/dep_service_ids.go

@@ -0,0 +1,141 @@
+package endpoints
+
+// Service identifiers
+//
+// Deprecated: Use client package's EndpointsID value instead of these
+// ServiceIDs. These IDs are not maintained, and are out of date.
+const (
+	A4bServiceID                          = "a4b"                          // A4b.
+	AcmServiceID                          = "acm"                          // Acm.
+	AcmPcaServiceID                       = "acm-pca"                      // AcmPca.
+	ApiMediatailorServiceID               = "api.mediatailor"              // ApiMediatailor.
+	ApiPricingServiceID                   = "api.pricing"                  // ApiPricing.
+	ApiSagemakerServiceID                 = "api.sagemaker"                // ApiSagemaker.
+	ApigatewayServiceID                   = "apigateway"                   // Apigateway.
+	ApplicationAutoscalingServiceID       = "application-autoscaling"      // ApplicationAutoscaling.
+	Appstream2ServiceID                   = "appstream2"                   // Appstream2.
+	AppsyncServiceID                      = "appsync"                      // Appsync.
+	AthenaServiceID                       = "athena"                       // Athena.
+	AutoscalingServiceID                  = "autoscaling"                  // Autoscaling.
+	AutoscalingPlansServiceID             = "autoscaling-plans"            // AutoscalingPlans.
+	BatchServiceID                        = "batch"                        // Batch.
+	BudgetsServiceID                      = "budgets"                      // Budgets.
+	CeServiceID                           = "ce"                           // Ce.
+	ChimeServiceID                        = "chime"                        // Chime.
+	Cloud9ServiceID                       = "cloud9"                       // Cloud9.
+	ClouddirectoryServiceID               = "clouddirectory"               // Clouddirectory.
+	CloudformationServiceID               = "cloudformation"               // Cloudformation.
+	CloudfrontServiceID                   = "cloudfront"                   // Cloudfront.
+	CloudhsmServiceID                     = "cloudhsm"                     // Cloudhsm.
+	Cloudhsmv2ServiceID                   = "cloudhsmv2"                   // Cloudhsmv2.
+	CloudsearchServiceID                  = "cloudsearch"                  // Cloudsearch.
+	CloudtrailServiceID                   = "cloudtrail"                   // Cloudtrail.
+	CodebuildServiceID                    = "codebuild"                    // Codebuild.
+	CodecommitServiceID                   = "codecommit"                   // Codecommit.
+	CodedeployServiceID                   = "codedeploy"                   // Codedeploy.
+	CodepipelineServiceID                 = "codepipeline"                 // Codepipeline.
+	CodestarServiceID                     = "codestar"                     // Codestar.
+	CognitoIdentityServiceID              = "cognito-identity"             // CognitoIdentity.
+	CognitoIdpServiceID                   = "cognito-idp"                  // CognitoIdp.
+	CognitoSyncServiceID                  = "cognito-sync"                 // CognitoSync.
+	ComprehendServiceID                   = "comprehend"                   // Comprehend.
+	ConfigServiceID                       = "config"                       // Config.
+	CurServiceID                          = "cur"                          // Cur.
+	DatapipelineServiceID                 = "datapipeline"                 // Datapipeline.
+	DaxServiceID                          = "dax"                          // Dax.
+	DevicefarmServiceID                   = "devicefarm"                   // Devicefarm.
+	DirectconnectServiceID                = "directconnect"                // Directconnect.
+	DiscoveryServiceID                    = "discovery"                    // Discovery.
+	DmsServiceID                          = "dms"                          // Dms.
+	DsServiceID                           = "ds"                           // Ds.
+	DynamodbServiceID                     = "dynamodb"                     // Dynamodb.
+	Ec2ServiceID                          = "ec2"                          // Ec2.
+	Ec2metadataServiceID                  = "ec2metadata"                  // Ec2metadata.
+	EcrServiceID                          = "ecr"                          // Ecr.
+	EcsServiceID                          = "ecs"                          // Ecs.
+	ElasticacheServiceID                  = "elasticache"                  // Elasticache.
+	ElasticbeanstalkServiceID             = "elasticbeanstalk"             // Elasticbeanstalk.
+	ElasticfilesystemServiceID            = "elasticfilesystem"            // Elasticfilesystem.
+	ElasticloadbalancingServiceID         = "elasticloadbalancing"         // Elasticloadbalancing.
+	ElasticmapreduceServiceID             = "elasticmapreduce"             // Elasticmapreduce.
+	ElastictranscoderServiceID            = "elastictranscoder"            // Elastictranscoder.
+	EmailServiceID                        = "email"                        // Email.
+	EntitlementMarketplaceServiceID       = "entitlement.marketplace"      // EntitlementMarketplace.
+	EsServiceID                           = "es"                           // Es.
+	EventsServiceID                       = "events"                       // Events.
+	FirehoseServiceID                     = "firehose"                     // Firehose.
+	FmsServiceID                          = "fms"                          // Fms.
+	GameliftServiceID                     = "gamelift"                     // Gamelift.
+	GlacierServiceID                      = "glacier"                      // Glacier.
+	GlueServiceID                         = "glue"                         // Glue.
+	GreengrassServiceID                   = "greengrass"                   // Greengrass.
+	GuarddutyServiceID                    = "guardduty"                    // Guardduty.
+	HealthServiceID                       = "health"                       // Health.
+	IamServiceID                          = "iam"                          // Iam.
+	ImportexportServiceID                 = "importexport"                 // Importexport.
+	InspectorServiceID                    = "inspector"                    // Inspector.
+	IotServiceID                          = "iot"                          // Iot.
+	IotanalyticsServiceID                 = "iotanalytics"                 // Iotanalytics.
+	KinesisServiceID                      = "kinesis"                      // Kinesis.
+	KinesisanalyticsServiceID             = "kinesisanalytics"             // Kinesisanalytics.
+	KinesisvideoServiceID                 = "kinesisvideo"                 // Kinesisvideo.
+	KmsServiceID                          = "kms"                          // Kms.
+	LambdaServiceID                       = "lambda"                       // Lambda.
+	LightsailServiceID                    = "lightsail"                    // Lightsail.
+	LogsServiceID                         = "logs"                         // Logs.
+	MachinelearningServiceID              = "machinelearning"              // Machinelearning.
+	MarketplacecommerceanalyticsServiceID = "marketplacecommerceanalytics" // Marketplacecommerceanalytics.
+	MediaconvertServiceID                 = "mediaconvert"                 // Mediaconvert.
+	MedialiveServiceID                    = "medialive"                    // Medialive.
+	MediapackageServiceID                 = "mediapackage"                 // Mediapackage.
+	MediastoreServiceID                   = "mediastore"                   // Mediastore.
+	MeteringMarketplaceServiceID          = "metering.marketplace"         // MeteringMarketplace.
+	MghServiceID                          = "mgh"                          // Mgh.
+	MobileanalyticsServiceID              = "mobileanalytics"              // Mobileanalytics.
+	ModelsLexServiceID                    = "models.lex"                   // ModelsLex.
+	MonitoringServiceID                   = "monitoring"                   // Monitoring.
+	MturkRequesterServiceID               = "mturk-requester"              // MturkRequester.
+	NeptuneServiceID                      = "neptune"                      // Neptune.
+	OpsworksServiceID                     = "opsworks"                     // Opsworks.
+	OpsworksCmServiceID                   = "opsworks-cm"                  // OpsworksCm.
+	OrganizationsServiceID                = "organizations"                // Organizations.
+	PinpointServiceID                     = "pinpoint"                     // Pinpoint.
+	PollyServiceID                        = "polly"                        // Polly.
+	RdsServiceID                          = "rds"                          // Rds.
+	RedshiftServiceID                     = "redshift"                     // Redshift.
+	RekognitionServiceID                  = "rekognition"                  // Rekognition.
+	ResourceGroupsServiceID               = "resource-groups"              // ResourceGroups.
+	Route53ServiceID                      = "route53"                      // Route53.
+	Route53domainsServiceID               = "route53domains"               // Route53domains.
+	RuntimeLexServiceID                   = "runtime.lex"                  // RuntimeLex.
+	RuntimeSagemakerServiceID             = "runtime.sagemaker"            // RuntimeSagemaker.
+	S3ServiceID                           = "s3"                           // S3.
+	S3ControlServiceID                    = "s3-control"                   // S3Control.
+	SagemakerServiceID                    = "api.sagemaker"                // Sagemaker.
+	SdbServiceID                          = "sdb"                          // Sdb.
+	SecretsmanagerServiceID               = "secretsmanager"               // Secretsmanager.
+	ServerlessrepoServiceID               = "serverlessrepo"               // Serverlessrepo.
+	ServicecatalogServiceID               = "servicecatalog"               // Servicecatalog.
+	ServicediscoveryServiceID             = "servicediscovery"             // Servicediscovery.
+	ShieldServiceID                       = "shield"                       // Shield.
+	SmsServiceID                          = "sms"                          // Sms.
+	SnowballServiceID                     = "snowball"                     // Snowball.
+	SnsServiceID                          = "sns"                          // Sns.
+	SqsServiceID                          = "sqs"                          // Sqs.
+	SsmServiceID                          = "ssm"                          // Ssm.
+	StatesServiceID                       = "states"                       // States.
+	StoragegatewayServiceID               = "storagegateway"               // Storagegateway.
+	StreamsDynamodbServiceID              = "streams.dynamodb"             // StreamsDynamodb.
+	StsServiceID                          = "sts"                          // Sts.
+	SupportServiceID                      = "support"                      // Support.
+	SwfServiceID                          = "swf"                          // Swf.
+	TaggingServiceID                      = "tagging"                      // Tagging.
+	TransferServiceID                     = "transfer"                     // Transfer.
+	TranslateServiceID                    = "translate"                    // Translate.
+	WafServiceID                          = "waf"                          // Waf.
+	WafRegionalServiceID                  = "waf-regional"                 // WafRegional.
+	WorkdocsServiceID                     = "workdocs"                     // Workdocs.
+	WorkmailServiceID                     = "workmail"                     // Workmail.
+	WorkspacesServiceID                   = "workspaces"                   // Workspaces.
+	XrayServiceID                         = "xray"                         // Xray.
+)

vendor/github.com/aws/aws-sdk-go/aws/endpoints/doc.go

@@ -0,0 +1,66 @@
+// Package endpoints provides the types and functionality for defining regions
+// and endpoints, as well as querying those definitions.
+//
+// The SDK's Regions and Endpoints metadata is code generated into the endpoints
+// package, and is accessible via the DefaultResolver function. This function
+// returns a endpoint Resolver will search the metadata and build an associated
+// endpoint if one is found. The default resolver will search all partitions
+// known by the SDK. e.g AWS Standard (aws), AWS China (aws-cn), and
+// AWS GovCloud (US) (aws-us-gov).
+// .
+//
+// Enumerating Regions and Endpoint Metadata
+//
+// Casting the Resolver returned by DefaultResolver to a EnumPartitions interface
+// will allow you to get access to the list of underlying Partitions with the
+// Partitions method. This is helpful if you want to limit the SDK's endpoint
+// resolving to a single partition, or enumerate regions, services, and endpoints
+// in the partition.
+//
+//     resolver := endpoints.DefaultResolver()
+//     partitions := resolver.(endpoints.EnumPartitions).Partitions()
+//
+//     for _, p := range partitions {
+//         fmt.Println("Regions for", p.ID())
+//         for id, _ := range p.Regions() {
+//             fmt.Println("*", id)
+//         }
+//
+//         fmt.Println("Services for", p.ID())
+//         for id, _ := range p.Services() {
+//             fmt.Println("*", id)
+//         }
+//     }
+//
+// Using Custom Endpoints
+//
+// The endpoints package also gives you the ability to use your own logic how
+// endpoints are resolved. This is a great way to define a custom endpoint
+// for select services, without passing that logic down through your code.
+//
+// If a type implements the Resolver interface it can be used to resolve
+// endpoints. To use this with the SDK's Session and Config set the value
+// of the type to the EndpointsResolver field of aws.Config when initializing
+// the session, or service client.
+//
+// In addition the ResolverFunc is a wrapper for a func matching the signature
+// of Resolver.EndpointFor, converting it to a type that satisfies the
+// Resolver interface.
+//
+//
+//     myCustomResolver := func(service, region string, optFns ...func(*endpoints.Options)) (endpoints.ResolvedEndpoint, error) {
+//         if service == endpoints.S3ServiceID {
+//             return endpoints.ResolvedEndpoint{
+//                 URL:           "s3.custom.endpoint.com",
+//                 SigningRegion: "custom-signing-region",
+//             }, nil
+//         }
+//
+//         return endpoints.DefaultResolver().EndpointFor(service, region, optFns...)
+//     }
+//
+//     sess := session.Must(session.NewSession(&aws.Config{
+//         Region:           aws.String("us-west-2"),
+//         EndpointResolver: endpoints.ResolverFunc(myCustomResolver),
+//     }))
+package endpoints

vendor/github.com/aws/aws-sdk-go/aws/endpoints/endpoints.go

@@ -0,0 +1,452 @@
+package endpoints
+
+import (
+	"fmt"
+	"regexp"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+// Options provide the configuration needed to direct how the
+// endpoints will be resolved.
+type Options struct {
+	// DisableSSL forces the endpoint to be resolved as HTTP.
+	// instead of HTTPS if the service supports it.
+	DisableSSL bool
+
+	// Sets the resolver to resolve the endpoint as a dualstack endpoint
+	// for the service. If dualstack support for a service is not known and
+	// StrictMatching is not enabled a dualstack endpoint for the service will
+	// be returned. This endpoint may not be valid. If StrictMatching is
+	// enabled only services that are known to support dualstack will return
+	// dualstack endpoints.
+	UseDualStack bool
+
+	// Enables strict matching of services and regions resolved endpoints.
+	// If the partition doesn't enumerate the exact service and region an
+	// error will be returned. This option will prevent returning endpoints
+	// that look valid, but may not resolve to any real endpoint.
+	StrictMatching bool
+
+	// Enables resolving a service endpoint based on the region provided if the
+	// service does not exist. The service endpoint ID will be used as the service
+	// domain name prefix. By default the endpoint resolver requires the service
+	// to be known when resolving endpoints.
+	//
+	// If resolving an endpoint on the partition list the provided region will
+	// be used to determine which partition's domain name pattern to the service
+	// endpoint ID with. If both the service and region are unknown and resolving
+	// the endpoint on partition list an UnknownEndpointError error will be returned.
+	//
+	// If resolving and endpoint on a partition specific resolver that partition's
+	// domain name pattern will be used with the service endpoint ID. If both
+	// region and service do not exist when resolving an endpoint on a specific
+	// partition the partition's domain pattern will be used to combine the
+	// endpoint and region together.
+	//
+	// This option is ignored if StrictMatching is enabled.
+	ResolveUnknownService bool
+}
+
+// Set combines all of the option functions together.
+func (o *Options) Set(optFns ...func(*Options)) {
+	for _, fn := range optFns {
+		fn(o)
+	}
+}
+
+// DisableSSLOption sets the DisableSSL options. Can be used as a functional
+// option when resolving endpoints.
+func DisableSSLOption(o *Options) {
+	o.DisableSSL = true
+}
+
+// UseDualStackOption sets the UseDualStack option. Can be used as a functional
+// option when resolving endpoints.
+func UseDualStackOption(o *Options) {
+	o.UseDualStack = true
+}
+
+// StrictMatchingOption sets the StrictMatching option. Can be used as a functional
+// option when resolving endpoints.
+func StrictMatchingOption(o *Options) {
+	o.StrictMatching = true
+}
+
+// ResolveUnknownServiceOption sets the ResolveUnknownService option. Can be used
+// as a functional option when resolving endpoints.
+func ResolveUnknownServiceOption(o *Options) {
+	o.ResolveUnknownService = true
+}
+
+// A Resolver provides the interface for functionality to resolve endpoints.
+// The build in Partition and DefaultResolver return value satisfy this interface.
+type Resolver interface {
+	EndpointFor(service, region string, opts ...func(*Options)) (ResolvedEndpoint, error)
+}
+
+// ResolverFunc is a helper utility that wraps a function so it satisfies the
+// Resolver interface. This is useful when you want to add additional endpoint
+// resolving logic, or stub out specific endpoints with custom values.
+type ResolverFunc func(service, region string, opts ...func(*Options)) (ResolvedEndpoint, error)
+
+// EndpointFor wraps the ResolverFunc function to satisfy the Resolver interface.
+func (fn ResolverFunc) EndpointFor(service, region string, opts ...func(*Options)) (ResolvedEndpoint, error) {
+	return fn(service, region, opts...)
+}
+
+var schemeRE = regexp.MustCompile("^([^:]+)://")
+
+// AddScheme adds the HTTP or HTTPS schemes to a endpoint URL if there is no
+// scheme. If disableSSL is true HTTP will set HTTP instead of the default HTTPS.
+//
+// If disableSSL is set, it will only set the URL's scheme if the URL does not
+// contain a scheme.
+func AddScheme(endpoint string, disableSSL bool) string {
+	if !schemeRE.MatchString(endpoint) {
+		scheme := "https"
+		if disableSSL {
+			scheme = "http"
+		}
+		endpoint = fmt.Sprintf("%s://%s", scheme, endpoint)
+	}
+
+	return endpoint
+}
+
+// EnumPartitions a provides a way to retrieve the underlying partitions that
+// make up the SDK's default Resolver, or any resolver decoded from a model
+// file.
+//
+// Use this interface with DefaultResolver and DecodeModels to get the list of
+// Partitions.
+type EnumPartitions interface {
+	Partitions() []Partition
+}
+
+// RegionsForService returns a map of regions for the partition and service.
+// If either the partition or service does not exist false will be returned
+// as the second parameter.
+//
+// This example shows how  to get the regions for DynamoDB in the AWS partition.
+//    rs, exists := endpoints.RegionsForService(endpoints.DefaultPartitions(), endpoints.AwsPartitionID, endpoints.DynamodbServiceID)
+//
+// This is equivalent to using the partition directly.
+//    rs := endpoints.AwsPartition().Services()[endpoints.DynamodbServiceID].Regions()
+func RegionsForService(ps []Partition, partitionID, serviceID string) (map[string]Region, bool) {
+	for _, p := range ps {
+		if p.ID() != partitionID {
+			continue
+		}
+		if _, ok := p.p.Services[serviceID]; !ok {
+			break
+		}
+
+		s := Service{
+			id: serviceID,
+			p:  p.p,
+		}
+		return s.Regions(), true
+	}
+
+	return map[string]Region{}, false
+}
+
+// PartitionForRegion returns the first partition which includes the region
+// passed in. This includes both known regions and regions which match
+// a pattern supported by the partition which may include regions that are
+// not explicitly known by the partition. Use the Regions method of the
+// returned Partition if explicit support is needed.
+func PartitionForRegion(ps []Partition, regionID string) (Partition, bool) {
+	for _, p := range ps {
+		if _, ok := p.p.Regions[regionID]; ok || p.p.RegionRegex.MatchString(regionID) {
+			return p, true
+		}
+	}
+
+	return Partition{}, false
+}
+
+// A Partition provides the ability to enumerate the partition's regions
+// and services.
+type Partition struct {
+	id, dnsSuffix string
+	p             *partition
+}
+
+// DNSSuffix returns the base domain name of the partition.
+func (p Partition) DNSSuffix() string { return p.dnsSuffix }
+
+// ID returns the identifier of the partition.
+func (p Partition) ID() string { return p.id }
+
+// EndpointFor attempts to resolve the endpoint based on service and region.
+// See Options for information on configuring how the endpoint is resolved.
+//
+// If the service cannot be found in the metadata the UnknownServiceError
+// error will be returned. This validation will occur regardless if
+// StrictMatching is enabled. To enable resolving unknown services set the
+// "ResolveUnknownService" option to true. When StrictMatching is disabled
+// this option allows the partition resolver to resolve a endpoint based on
+// the service endpoint ID provided.
+//
+// When resolving endpoints you can choose to enable StrictMatching. This will
+// require the provided service and region to be known by the partition.
+// If the endpoint cannot be strictly resolved an error will be returned. This
+// mode is useful to ensure the endpoint resolved is valid. Without
+// StrictMatching enabled the endpoint returned my look valid but may not work.
+// StrictMatching requires the SDK to be updated if you want to take advantage
+// of new regions and services expansions.
+//
+// Errors that can be returned.
+//   * UnknownServiceError
+//   * UnknownEndpointError
+func (p Partition) EndpointFor(service, region string, opts ...func(*Options)) (ResolvedEndpoint, error) {
+	return p.p.EndpointFor(service, region, opts...)
+}
+
+// Regions returns a map of Regions indexed by their ID. This is useful for
+// enumerating over the regions in a partition.
+func (p Partition) Regions() map[string]Region {
+	rs := map[string]Region{}
+	for id, r := range p.p.Regions {
+		rs[id] = Region{
+			id:   id,
+			desc: r.Description,
+			p:    p.p,
+		}
+	}
+
+	return rs
+}
+
+// Services returns a map of Service indexed by their ID. This is useful for
+// enumerating over the services in a partition.
+func (p Partition) Services() map[string]Service {
+	ss := map[string]Service{}
+	for id := range p.p.Services {
+		ss[id] = Service{
+			id: id,
+			p:  p.p,
+		}
+	}
+
+	return ss
+}
+
+// A Region provides information about a region, and ability to resolve an
+// endpoint from the context of a region, given a service.
+type Region struct {
+	id, desc string
+	p        *partition
+}
+
+// ID returns the region's identifier.
+func (r Region) ID() string { return r.id }
+
+// Description returns the region's description. The region description
+// is free text, it can be empty, and it may change between SDK releases.
+func (r Region) Description() string { return r.desc }
+
+// ResolveEndpoint resolves an endpoint from the context of the region given
+// a service. See Partition.EndpointFor for usage and errors that can be returned.
+func (r Region) ResolveEndpoint(service string, opts ...func(*Options)) (ResolvedEndpoint, error) {
+	return r.p.EndpointFor(service, r.id, opts...)
+}
+
+// Services returns a list of all services that are known to be in this region.
+func (r Region) Services() map[string]Service {
+	ss := map[string]Service{}
+	for id, s := range r.p.Services {
+		if _, ok := s.Endpoints[r.id]; ok {
+			ss[id] = Service{
+				id: id,
+				p:  r.p,
+			}
+		}
+	}
+
+	return ss
+}
+
+// A Service provides information about a service, and ability to resolve an
+// endpoint from the context of a service, given a region.
+type Service struct {
+	id string
+	p  *partition
+}
+
+// ID returns the identifier for the service.
+func (s Service) ID() string { return s.id }
+
+// ResolveEndpoint resolves an endpoint from the context of a service given
+// a region. See Partition.EndpointFor for usage and errors that can be returned.
+func (s Service) ResolveEndpoint(region string, opts ...func(*Options)) (ResolvedEndpoint, error) {
+	return s.p.EndpointFor(s.id, region, opts...)
+}
+
+// Regions returns a map of Regions that the service is present in.
+//
+// A region is the AWS region the service exists in. Whereas a Endpoint is
+// an URL that can be resolved to a instance of a service.
+func (s Service) Regions() map[string]Region {
+	rs := map[string]Region{}
+	for id := range s.p.Services[s.id].Endpoints {
+		if r, ok := s.p.Regions[id]; ok {
+			rs[id] = Region{
+				id:   id,
+				desc: r.Description,
+				p:    s.p,
+			}
+		}
+	}
+
+	return rs
+}
+
+// Endpoints returns a map of Endpoints indexed by their ID for all known
+// endpoints for a service.
+//
+// A region is the AWS region the service exists in. Whereas a Endpoint is
+// an URL that can be resolved to a instance of a service.
+func (s Service) Endpoints() map[string]Endpoint {
+	es := map[string]Endpoint{}
+	for id := range s.p.Services[s.id].Endpoints {
+		es[id] = Endpoint{
+			id:        id,
+			serviceID: s.id,
+			p:         s.p,
+		}
+	}
+
+	return es
+}
+
+// A Endpoint provides information about endpoints, and provides the ability
+// to resolve that endpoint for the service, and the region the endpoint
+// represents.
+type Endpoint struct {
+	id        string
+	serviceID string
+	p         *partition
+}
+
+// ID returns the identifier for an endpoint.
+func (e Endpoint) ID() string { return e.id }
+
+// ServiceID returns the identifier the endpoint belongs to.
+func (e Endpoint) ServiceID() string { return e.serviceID }
+
+// ResolveEndpoint resolves an endpoint from the context of a service and
+// region the endpoint represents. See Partition.EndpointFor for usage and
+// errors that can be returned.
+func (e Endpoint) ResolveEndpoint(opts ...func(*Options)) (ResolvedEndpoint, error) {
+	return e.p.EndpointFor(e.serviceID, e.id, opts...)
+}
+
+// A ResolvedEndpoint is an endpoint that has been resolved based on a partition
+// service, and region.
+type ResolvedEndpoint struct {
+	// The endpoint URL
+	URL string
+
+	// The region that should be used for signing requests.
+	SigningRegion string
+
+	// The service name that should be used for signing requests.
+	SigningName string
+
+	// States that the signing name for this endpoint was derived from metadata
+	// passed in, but was not explicitly modeled.
+	SigningNameDerived bool
+
+	// The signing method that should be used for signing requests.
+	SigningMethod string
+}
+
+// So that the Error interface type can be included as an anonymous field
+// in the requestError struct and not conflict with the error.Error() method.
+type awsError awserr.Error
+
+// A EndpointNotFoundError is returned when in StrictMatching mode, and the
+// endpoint for the service and region cannot be found in any of the partitions.
+type EndpointNotFoundError struct {
+	awsError
+	Partition string
+	Service   string
+	Region    string
+}
+
+// A UnknownServiceError is returned when the service does not resolve to an
+// endpoint. Includes a list of all known services for the partition. Returned
+// when a partition does not support the service.
+type UnknownServiceError struct {
+	awsError
+	Partition string
+	Service   string
+	Known     []string
+}
+
+// NewUnknownServiceError builds and returns UnknownServiceError.
+func NewUnknownServiceError(p, s string, known []string) UnknownServiceError {
+	return UnknownServiceError{
+		awsError: awserr.New("UnknownServiceError",
+			"could not resolve endpoint for unknown service", nil),
+		Partition: p,
+		Service:   s,
+		Known:     known,
+	}
+}
+
+// String returns the string representation of the error.
+func (e UnknownServiceError) Error() string {
+	extra := fmt.Sprintf("partition: %q, service: %q",
+		e.Partition, e.Service)
+	if len(e.Known) > 0 {
+		extra += fmt.Sprintf(", known: %v", e.Known)
+	}
+	return awserr.SprintError(e.Code(), e.Message(), extra, e.OrigErr())
+}
+
+// String returns the string representation of the error.
+func (e UnknownServiceError) String() string {
+	return e.Error()
+}
+
+// A UnknownEndpointError is returned when in StrictMatching mode and the
+// service is valid, but the region does not resolve to an endpoint. Includes
+// a list of all known endpoints for the service.
+type UnknownEndpointError struct {
+	awsError
+	Partition string
+	Service   string
+	Region    string
+	Known     []string
+}
+
+// NewUnknownEndpointError builds and returns UnknownEndpointError.
+func NewUnknownEndpointError(p, s, r string, known []string) UnknownEndpointError {
+	return UnknownEndpointError{
+		awsError: awserr.New("UnknownEndpointError",
+			"could not resolve endpoint", nil),
+		Partition: p,
+		Service:   s,
+		Region:    r,
+		Known:     known,
+	}
+}
+
+// String returns the string representation of the error.
+func (e UnknownEndpointError) Error() string {
+	extra := fmt.Sprintf("partition: %q, service: %q, region: %q",
+		e.Partition, e.Service, e.Region)
+	if len(e.Known) > 0 {
+		extra += fmt.Sprintf(", known: %v", e.Known)
+	}
+	return awserr.SprintError(e.Code(), e.Message(), extra, e.OrigErr())
+}
+
+// String returns the string representation of the error.
+func (e UnknownEndpointError) String() string {
+	return e.Error()
+}

vendor/github.com/aws/aws-sdk-go/aws/endpoints/v3model.go

@@ -0,0 +1,308 @@
+package endpoints
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type partitions []partition
+
+func (ps partitions) EndpointFor(service, region string, opts ...func(*Options)) (ResolvedEndpoint, error) {
+	var opt Options
+	opt.Set(opts...)
+
+	for i := 0; i < len(ps); i++ {
+		if !ps[i].canResolveEndpoint(service, region, opt.StrictMatching) {
+			continue
+		}
+
+		return ps[i].EndpointFor(service, region, opts...)
+	}
+
+	// If loose matching fallback to first partition format to use
+	// when resolving the endpoint.
+	if !opt.StrictMatching && len(ps) > 0 {
+		return ps[0].EndpointFor(service, region, opts...)
+	}
+
+	return ResolvedEndpoint{}, NewUnknownEndpointError("all partitions", service, region, []string{})
+}
+
+// Partitions satisfies the EnumPartitions interface and returns a list
+// of Partitions representing each partition represented in the SDK's
+// endpoints model.
+func (ps partitions) Partitions() []Partition {
+	parts := make([]Partition, 0, len(ps))
+	for i := 0; i < len(ps); i++ {
+		parts = append(parts, ps[i].Partition())
+	}
+
+	return parts
+}
+
+type partition struct {
+	ID          string      `json:"partition"`
+	Name        string      `json:"partitionName"`
+	DNSSuffix   string      `json:"dnsSuffix"`
+	RegionRegex regionRegex `json:"regionRegex"`
+	Defaults    endpoint    `json:"defaults"`
+	Regions     regions     `json:"regions"`
+	Services    services    `json:"services"`
+}
+
+func (p partition) Partition() Partition {
+	return Partition{
+		dnsSuffix: p.DNSSuffix,
+		id:        p.ID,
+		p:         &p,
+	}
+}
+
+func (p partition) canResolveEndpoint(service, region string, strictMatch bool) bool {
+	s, hasService := p.Services[service]
+	_, hasEndpoint := s.Endpoints[region]
+
+	if hasEndpoint && hasService {
+		return true
+	}
+
+	if strictMatch {
+		return false
+	}
+
+	return p.RegionRegex.MatchString(region)
+}
+
+func (p partition) EndpointFor(service, region string, opts ...func(*Options)) (resolved ResolvedEndpoint, err error) {
+	var opt Options
+	opt.Set(opts...)
+
+	s, hasService := p.Services[service]
+	if !(hasService || opt.ResolveUnknownService) {
+		// Only return error if the resolver will not fallback to creating
+		// endpoint based on service endpoint ID passed in.
+		return resolved, NewUnknownServiceError(p.ID, service, serviceList(p.Services))
+	}
+
+	e, hasEndpoint := s.endpointForRegion(region)
+	if !hasEndpoint && opt.StrictMatching {
+		return resolved, NewUnknownEndpointError(p.ID, service, region, endpointList(s.Endpoints))
+	}
+
+	defs := []endpoint{p.Defaults, s.Defaults}
+	return e.resolve(service, region, p.DNSSuffix, defs, opt), nil
+}
+
+func serviceList(ss services) []string {
+	list := make([]string, 0, len(ss))
+	for k := range ss {
+		list = append(list, k)
+	}
+	return list
+}
+func endpointList(es endpoints) []string {
+	list := make([]string, 0, len(es))
+	for k := range es {
+		list = append(list, k)
+	}
+	return list
+}
+
+type regionRegex struct {
+	*regexp.Regexp
+}
+
+func (rr *regionRegex) UnmarshalJSON(b []byte) (err error) {
+	// Strip leading and trailing quotes
+	regex, err := strconv.Unquote(string(b))
+	if err != nil {
+		return fmt.Errorf("unable to strip quotes from regex, %v", err)
+	}
+
+	rr.Regexp, err = regexp.Compile(regex)
+	if err != nil {
+		return fmt.Errorf("unable to unmarshal region regex, %v", err)
+	}
+	return nil
+}
+
+type regions map[string]region
+
+type region struct {
+	Description string `json:"description"`
+}
+
+type services map[string]service
+
+type service struct {
+	PartitionEndpoint string    `json:"partitionEndpoint"`
+	IsRegionalized    boxedBool `json:"isRegionalized,omitempty"`
+	Defaults          endpoint  `json:"defaults"`
+	Endpoints         endpoints `json:"endpoints"`
+}
+
+func (s *service) endpointForRegion(region string) (endpoint, bool) {
+	if s.IsRegionalized == boxedFalse {
+		return s.Endpoints[s.PartitionEndpoint], region == s.PartitionEndpoint
+	}
+
+	if e, ok := s.Endpoints[region]; ok {
+		return e, true
+	}
+
+	// Unable to find any matching endpoint, return
+	// blank that will be used for generic endpoint creation.
+	return endpoint{}, false
+}
+
+type endpoints map[string]endpoint
+
+type endpoint struct {
+	Hostname        string          `json:"hostname"`
+	Protocols       []string        `json:"protocols"`
+	CredentialScope credentialScope `json:"credentialScope"`
+
+	// Custom fields not modeled
+	HasDualStack      boxedBool `json:"-"`
+	DualStackHostname string    `json:"-"`
+
+	// Signature Version not used
+	SignatureVersions []string `json:"signatureVersions"`
+
+	// SSLCommonName not used.
+	SSLCommonName string `json:"sslCommonName"`
+}
+
+const (
+	defaultProtocol = "https"
+	defaultSigner   = "v4"
+)
+
+var (
+	protocolPriority = []string{"https", "http"}
+	signerPriority   = []string{"v4", "v2"}
+)
+
+func getByPriority(s []string, p []string, def string) string {
+	if len(s) == 0 {
+		return def
+	}
+
+	for i := 0; i < len(p); i++ {
+		for j := 0; j < len(s); j++ {
+			if s[j] == p[i] {
+				return s[j]
+			}
+		}
+	}
+
+	return s[0]
+}
+
+func (e endpoint) resolve(service, region, dnsSuffix string, defs []endpoint, opts Options) ResolvedEndpoint {
+	var merged endpoint
+	for _, def := range defs {
+		merged.mergeIn(def)
+	}
+	merged.mergeIn(e)
+	e = merged
+
+	hostname := e.Hostname
+
+	// Offset the hostname for dualstack if enabled
+	if opts.UseDualStack && e.HasDualStack == boxedTrue {
+		hostname = e.DualStackHostname
+	}
+
+	u := strings.Replace(hostname, "{service}", service, 1)
+	u = strings.Replace(u, "{region}", region, 1)
+	u = strings.Replace(u, "{dnsSuffix}", dnsSuffix, 1)
+
+	scheme := getEndpointScheme(e.Protocols, opts.DisableSSL)
+	u = fmt.Sprintf("%s://%s", scheme, u)
+
+	signingRegion := e.CredentialScope.Region
+	if len(signingRegion) == 0 {
+		signingRegion = region
+	}
+
+	signingName := e.CredentialScope.Service
+	var signingNameDerived bool
+	if len(signingName) == 0 {
+		signingName = service
+		signingNameDerived = true
+	}
+
+	return ResolvedEndpoint{
+		URL:                u,
+		SigningRegion:      signingRegion,
+		SigningName:        signingName,
+		SigningNameDerived: signingNameDerived,
+		SigningMethod:      getByPriority(e.SignatureVersions, signerPriority, defaultSigner),
+	}
+}
+
+func getEndpointScheme(protocols []string, disableSSL bool) string {
+	if disableSSL {
+		return "http"
+	}
+
+	return getByPriority(protocols, protocolPriority, defaultProtocol)
+}
+
+func (e *endpoint) mergeIn(other endpoint) {
+	if len(other.Hostname) > 0 {
+		e.Hostname = other.Hostname
+	}
+	if len(other.Protocols) > 0 {
+		e.Protocols = other.Protocols
+	}
+	if len(other.SignatureVersions) > 0 {
+		e.SignatureVersions = other.SignatureVersions
+	}
+	if len(other.CredentialScope.Region) > 0 {
+		e.CredentialScope.Region = other.CredentialScope.Region
+	}
+	if len(other.CredentialScope.Service) > 0 {
+		e.CredentialScope.Service = other.CredentialScope.Service
+	}
+	if len(other.SSLCommonName) > 0 {
+		e.SSLCommonName = other.SSLCommonName
+	}
+	if other.HasDualStack != boxedBoolUnset {
+		e.HasDualStack = other.HasDualStack
+	}
+	if len(other.DualStackHostname) > 0 {
+		e.DualStackHostname = other.DualStackHostname
+	}
+}
+
+type credentialScope struct {
+	Region  string `json:"region"`
+	Service string `json:"service"`
+}
+
+type boxedBool int
+
+func (b *boxedBool) UnmarshalJSON(buf []byte) error {
+	v, err := strconv.ParseBool(string(buf))
+	if err != nil {
+		return err
+	}
+
+	if v {
+		*b = boxedTrue
+	} else {
+		*b = boxedFalse
+	}
+
+	return nil
+}
+
+const (
+	boxedBoolUnset boxedBool = iota
+	boxedFalse
+	boxedTrue
+)

vendor/github.com/aws/aws-sdk-go/aws/endpoints/v3model_codegen.go

@@ -0,0 +1,351 @@
+// +build codegen
+
+package endpoints
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"strings"
+	"text/template"
+	"unicode"
+)
+
+// A CodeGenOptions are the options for code generating the endpoints into
+// Go code from the endpoints model definition.
+type CodeGenOptions struct {
+	// Options for how the model will be decoded.
+	DecodeModelOptions DecodeModelOptions
+
+	// Disables code generation of the service endpoint prefix IDs defined in
+	// the model.
+	DisableGenerateServiceIDs bool
+}
+
+// Set combines all of the option functions together
+func (d *CodeGenOptions) Set(optFns ...func(*CodeGenOptions)) {
+	for _, fn := range optFns {
+		fn(d)
+	}
+}
+
+// CodeGenModel given a endpoints model file will decode it and attempt to
+// generate Go code from the model definition. Error will be returned if
+// the code is unable to be generated, or decoded.
+func CodeGenModel(modelFile io.Reader, outFile io.Writer, optFns ...func(*CodeGenOptions)) error {
+	var opts CodeGenOptions
+	opts.Set(optFns...)
+
+	resolver, err := DecodeModel(modelFile, func(d *DecodeModelOptions) {
+		*d = opts.DecodeModelOptions
+	})
+	if err != nil {
+		return err
+	}
+
+	v := struct {
+		Resolver
+		CodeGenOptions
+	}{
+		Resolver:       resolver,
+		CodeGenOptions: opts,
+	}
+
+	tmpl := template.Must(template.New("tmpl").Funcs(funcMap).Parse(v3Tmpl))
+	if err := tmpl.ExecuteTemplate(outFile, "defaults", v); err != nil {
+		return fmt.Errorf("failed to execute template, %v", err)
+	}
+
+	return nil
+}
+
+func toSymbol(v string) string {
+	out := []rune{}
+	for _, c := range strings.Title(v) {
+		if !(unicode.IsNumber(c) || unicode.IsLetter(c)) {
+			continue
+		}
+
+		out = append(out, c)
+	}
+
+	return string(out)
+}
+
+func quoteString(v string) string {
+	return fmt.Sprintf("%q", v)
+}
+
+func regionConstName(p, r string) string {
+	return toSymbol(p) + toSymbol(r)
+}
+
+func partitionGetter(id string) string {
+	return fmt.Sprintf("%sPartition", toSymbol(id))
+}
+
+func partitionVarName(id string) string {
+	return fmt.Sprintf("%sPartition", strings.ToLower(toSymbol(id)))
+}
+
+func listPartitionNames(ps partitions) string {
+	names := []string{}
+	switch len(ps) {
+	case 1:
+		return ps[0].Name
+	case 2:
+		return fmt.Sprintf("%s and %s", ps[0].Name, ps[1].Name)
+	default:
+		for i, p := range ps {
+			if i == len(ps)-1 {
+				names = append(names, "and "+p.Name)
+			} else {
+				names = append(names, p.Name)
+			}
+		}
+		return strings.Join(names, ", ")
+	}
+}
+
+func boxedBoolIfSet(msg string, v boxedBool) string {
+	switch v {
+	case boxedTrue:
+		return fmt.Sprintf(msg, "boxedTrue")
+	case boxedFalse:
+		return fmt.Sprintf(msg, "boxedFalse")
+	default:
+		return ""
+	}
+}
+
+func stringIfSet(msg, v string) string {
+	if len(v) == 0 {
+		return ""
+	}
+
+	return fmt.Sprintf(msg, v)
+}
+
+func stringSliceIfSet(msg string, vs []string) string {
+	if len(vs) == 0 {
+		return ""
+	}
+
+	names := []string{}
+	for _, v := range vs {
+		names = append(names, `"`+v+`"`)
+	}
+
+	return fmt.Sprintf(msg, strings.Join(names, ","))
+}
+
+func endpointIsSet(v endpoint) bool {
+	return !reflect.DeepEqual(v, endpoint{})
+}
+
+func serviceSet(ps partitions) map[string]struct{} {
+	set := map[string]struct{}{}
+	for _, p := range ps {
+		for id := range p.Services {
+			set[id] = struct{}{}
+		}
+	}
+
+	return set
+}
+
+var funcMap = template.FuncMap{
+	"ToSymbol":           toSymbol,
+	"QuoteString":        quoteString,
+	"RegionConst":        regionConstName,
+	"PartitionGetter":    partitionGetter,
+	"PartitionVarName":   partitionVarName,
+	"ListPartitionNames": listPartitionNames,
+	"BoxedBoolIfSet":     boxedBoolIfSet,
+	"StringIfSet":        stringIfSet,
+	"StringSliceIfSet":   stringSliceIfSet,
+	"EndpointIsSet":      endpointIsSet,
+	"ServicesSet":        serviceSet,
+}
+
+const v3Tmpl = `
+{{ define "defaults" -}}
+// Code generated by aws/endpoints/v3model_codegen.go. DO NOT EDIT.
+
+package endpoints
+
+import (
+	"regexp"
+)
+
+	{{ template "partition consts" $.Resolver }}
+
+	{{ range $_, $partition := $.Resolver }}
+		{{ template "partition region consts" $partition }}
+	{{ end }}
+
+	{{ if not $.DisableGenerateServiceIDs -}}
+	{{ template "service consts" $.Resolver }}
+	{{- end }}
+	
+	{{ template "endpoint resolvers" $.Resolver }}
+{{- end }}
+
+{{ define "partition consts" }}
+	// Partition identifiers
+	const (
+		{{ range $_, $p := . -}}
+			{{ ToSymbol $p.ID }}PartitionID = {{ QuoteString $p.ID }} // {{ $p.Name }} partition.
+		{{ end -}}
+	)
+{{- end }}
+
+{{ define "partition region consts" }}
+	// {{ .Name }} partition's regions.
+	const (
+		{{ range $id, $region := .Regions -}}
+			{{ ToSymbol $id }}RegionID = {{ QuoteString $id }} // {{ $region.Description }}.
+		{{ end -}}
+	)
+{{- end }}
+
+{{ define "service consts" }}
+	// Service identifiers
+	const (
+		{{ $serviceSet := ServicesSet . -}}
+		{{ range $id, $_ := $serviceSet -}}
+			{{ ToSymbol $id }}ServiceID = {{ QuoteString $id }} // {{ ToSymbol $id }}.
+		{{ end -}}
+	)
+{{- end }}
+
+{{ define "endpoint resolvers" }}
+	// DefaultResolver returns an Endpoint resolver that will be able
+	// to resolve endpoints for: {{ ListPartitionNames . }}.
+	//
+	// Use DefaultPartitions() to get the list of the default partitions.
+	func DefaultResolver() Resolver {
+		return defaultPartitions
+	}
+
+	// DefaultPartitions returns a list of the partitions the SDK is bundled
+	// with. The available partitions are: {{ ListPartitionNames . }}.
+	//
+	//    partitions := endpoints.DefaultPartitions
+	//    for _, p := range partitions {
+	//        // ... inspect partitions
+	//    }
+	func DefaultPartitions() []Partition {
+		return defaultPartitions.Partitions()
+	}
+
+	var defaultPartitions = partitions{
+		{{ range $_, $partition := . -}}
+			{{ PartitionVarName $partition.ID }},
+		{{ end }}
+	}
+	
+	{{ range $_, $partition := . -}}
+		{{ $name := PartitionGetter $partition.ID -}}
+		// {{ $name }} returns the Resolver for {{ $partition.Name }}.
+		func {{ $name }}() Partition {
+			return  {{ PartitionVarName $partition.ID }}.Partition()
+		}
+		var {{ PartitionVarName $partition.ID }} = {{ template "gocode Partition" $partition }}
+	{{ end }}
+{{ end }}
+
+{{ define "default partitions" }}
+	func DefaultPartitions() []Partition {
+		return []partition{
+			{{ range $_, $partition := . -}}
+			// {{ ToSymbol $partition.ID}}Partition(),
+			{{ end }}
+		}
+	}
+{{ end }}
+
+{{ define "gocode Partition" -}}
+partition{
+	{{ StringIfSet "ID: %q,\n" .ID -}}
+	{{ StringIfSet "Name: %q,\n" .Name -}}
+	{{ StringIfSet "DNSSuffix: %q,\n" .DNSSuffix -}}
+	RegionRegex: {{ template "gocode RegionRegex" .RegionRegex }},
+	{{ if EndpointIsSet .Defaults -}}
+		Defaults: {{ template "gocode Endpoint" .Defaults }},
+	{{- end }}
+	Regions:  {{ template "gocode Regions" .Regions }},
+	Services: {{ template "gocode Services" .Services }},
+}
+{{- end }}
+
+{{ define "gocode RegionRegex" -}}
+regionRegex{
+	Regexp: func() *regexp.Regexp{
+		reg, _ := regexp.Compile({{ QuoteString .Regexp.String }})
+		return reg
+	}(),
+}
+{{- end }}
+
+{{ define "gocode Regions" -}}
+regions{
+	{{ range $id, $region := . -}}
+		"{{ $id }}": {{ template "gocode Region" $region }},
+	{{ end -}}
+}
+{{- end }}
+
+{{ define "gocode Region" -}}
+region{
+	{{ StringIfSet "Description: %q,\n" .Description -}}
+}
+{{- end }}
+
+{{ define "gocode Services" -}}
+services{
+	{{ range $id, $service := . -}}
+	"{{ $id }}": {{ template "gocode Service" $service }},
+	{{ end }}
+}
+{{- end }}
+
+{{ define "gocode Service" -}}
+service{
+	{{ StringIfSet "PartitionEndpoint: %q,\n" .PartitionEndpoint -}}
+	{{ BoxedBoolIfSet "IsRegionalized: %s,\n" .IsRegionalized -}}
+	{{ if EndpointIsSet .Defaults -}}
+		Defaults: {{ template "gocode Endpoint" .Defaults -}},
+	{{- end }}
+	{{ if .Endpoints -}}
+		Endpoints: {{ template "gocode Endpoints" .Endpoints }},
+	{{- end }}
+}
+{{- end }}
+
+{{ define "gocode Endpoints" -}}
+endpoints{
+	{{ range $id, $endpoint := . -}}
+	"{{ $id }}": {{ template "gocode Endpoint" $endpoint }},
+	{{ end }}
+}
+{{- end }}
+
+{{ define "gocode Endpoint" -}}
+endpoint{
+	{{ StringIfSet "Hostname: %q,\n" .Hostname -}}
+	{{ StringIfSet "SSLCommonName: %q,\n" .SSLCommonName -}}
+	{{ StringSliceIfSet "Protocols: []string{%s},\n" .Protocols -}}
+	{{ StringSliceIfSet "SignatureVersions: []string{%s},\n" .SignatureVersions -}}
+	{{ if or .CredentialScope.Region .CredentialScope.Service -}}
+	CredentialScope: credentialScope{
+		{{ StringIfSet "Region: %q,\n" .CredentialScope.Region -}}
+		{{ StringIfSet "Service: %q,\n" .CredentialScope.Service -}}
+	},
+	{{- end }}
+	{{ BoxedBoolIfSet "HasDualStack: %s,\n" .HasDualStack -}}
+	{{ StringIfSet "DualStackHostname: %q,\n" .DualStackHostname -}}
+
+}
+{{- end }}
+`

vendor/github.com/aws/aws-sdk-go/aws/errors.go

@@ -0,0 +1,13 @@
+package aws
+
+import "github.com/aws/aws-sdk-go/aws/awserr"
+
+var (
+	// ErrMissingRegion is an error that is returned if region configuration is
+	// not found.
+	ErrMissingRegion = awserr.New("MissingRegion", "could not find region configuration", nil)
+
+	// ErrMissingEndpoint is an error that is returned if an endpoint cannot be
+	// resolved for a service.
+	ErrMissingEndpoint = awserr.New("MissingEndpoint", "'Endpoint' configuration is required for this service", nil)
+)

vendor/github.com/aws/aws-sdk-go/aws/jsonvalue.go

@@ -0,0 +1,12 @@
+package aws
+
+// JSONValue is a representation of a grab bag type that will be marshaled
+// into a json string. This type can be used just like any other map.
+//
+//	Example:
+//
+//	values := aws.JSONValue{
+//		"Foo": "Bar",
+//	}
+//	values["Baz"] = "Qux"
+type JSONValue map[string]interface{}

vendor/github.com/aws/aws-sdk-go/aws/logger.go

@@ -0,0 +1,118 @@
+package aws
+
+import (
+	"log"
+	"os"
+)
+
+// A LogLevelType defines the level logging should be performed at. Used to instruct
+// the SDK which statements should be logged.
+type LogLevelType uint
+
+// LogLevel returns the pointer to a LogLevel. Should be used to workaround
+// not being able to take the address of a non-composite literal.
+func LogLevel(l LogLevelType) *LogLevelType {
+	return &l
+}
+
+// Value returns the LogLevel value or the default value LogOff if the LogLevel
+// is nil. Safe to use on nil value LogLevelTypes.
+func (l *LogLevelType) Value() LogLevelType {
+	if l != nil {
+		return *l
+	}
+	return LogOff
+}
+
+// Matches returns true if the v LogLevel is enabled by this LogLevel. Should be
+// used with logging sub levels. Is safe to use on nil value LogLevelTypes. If
+// LogLevel is nil, will default to LogOff comparison.
+func (l *LogLevelType) Matches(v LogLevelType) bool {
+	c := l.Value()
+	return c&v == v
+}
+
+// AtLeast returns true if this LogLevel is at least high enough to satisfies v.
+// Is safe to use on nil value LogLevelTypes. If LogLevel is nil, will default
+// to LogOff comparison.
+func (l *LogLevelType) AtLeast(v LogLevelType) bool {
+	c := l.Value()
+	return c >= v
+}
+
+const (
+	// LogOff states that no logging should be performed by the SDK. This is the
+	// default state of the SDK, and should be use to disable all logging.
+	LogOff LogLevelType = iota * 0x1000
+
+	// LogDebug state that debug output should be logged by the SDK. This should
+	// be used to inspect request made and responses received.
+	LogDebug
+)
+
+// Debug Logging Sub Levels
+const (
+	// LogDebugWithSigning states that the SDK should log request signing and
+	// presigning events. This should be used to log the signing details of
+	// requests for debugging. Will also enable LogDebug.
+	LogDebugWithSigning LogLevelType = LogDebug | (1 << iota)
+
+	// LogDebugWithHTTPBody states the SDK should log HTTP request and response
+	// HTTP bodys in addition to the headers and path. This should be used to
+	// see the body content of requests and responses made while using the SDK
+	// Will also enable LogDebug.
+	LogDebugWithHTTPBody
+
+	// LogDebugWithRequestRetries states the SDK should log when service requests will
+	// be retried. This should be used to log when you want to log when service
+	// requests are being retried. Will also enable LogDebug.
+	LogDebugWithRequestRetries
+
+	// LogDebugWithRequestErrors states the SDK should log when service requests fail
+	// to build, send, validate, or unmarshal.
+	LogDebugWithRequestErrors
+
+	// LogDebugWithEventStreamBody states the SDK should log EventStream
+	// request and response bodys. This should be used to log the EventStream
+	// wire unmarshaled message content of requests and responses made while
+	// using the SDK Will also enable LogDebug.
+	LogDebugWithEventStreamBody
+)
+
+// A Logger is a minimalistic interface for the SDK to log messages to. Should
+// be used to provide custom logging writers for the SDK to use.
+type Logger interface {
+	Log(...interface{})
+}
+
+// A LoggerFunc is a convenience type to convert a function taking a variadic
+// list of arguments and wrap it so the Logger interface can be used.
+//
+// Example:
+//     s3.New(sess, &aws.Config{Logger: aws.LoggerFunc(func(args ...interface{}) {
+//         fmt.Fprintln(os.Stdout, args...)
+//     })})
+type LoggerFunc func(...interface{})
+
+// Log calls the wrapped function with the arguments provided
+func (f LoggerFunc) Log(args ...interface{}) {
+	f(args...)
+}
+
+// NewDefaultLogger returns a Logger which will write log messages to stdout, and
+// use same formatting runes as the stdlib log.Logger
+func NewDefaultLogger() Logger {
+	return &defaultLogger{
+		logger: log.New(os.Stdout, "", log.LstdFlags),
+	}
+}
+
+// A defaultLogger provides a minimalistic logger satisfying the Logger interface.
+type defaultLogger struct {
+	logger *log.Logger
+}
+
+// Log logs the parameters to the stdlib logger. See log.Println.
+func (l defaultLogger) Log(args ...interface{}) {
+	l.logger.Println(args...)
+}

vendor/github.com/aws/aws-sdk-go/aws/request/connection_reset_error.go

@@ -0,0 +1,18 @@
+package request
+
+import (
+	"strings"
+)
+
+func isErrConnectionReset(err error) bool {
+	if strings.Contains(err.Error(), "read: connection reset") {
+		return false
+	}
+
+	if strings.Contains(err.Error(), "connection reset") ||
+		strings.Contains(err.Error(), "broken pipe") {
+		return true
+	}
+
+	return false
+}

vendor/github.com/aws/aws-sdk-go/aws/request/handlers.go

@@ -0,0 +1,322 @@
+package request
+
+import (
+	"fmt"
+	"strings"
+)
+
+// A Handlers provides a collection of request handlers for various
+// stages of handling requests.
+type Handlers struct {
+	Validate         HandlerList
+	Build            HandlerList
+	Sign             HandlerList
+	Send             HandlerList
+	ValidateResponse HandlerList
+	Unmarshal        HandlerList
+	UnmarshalStream  HandlerList
+	UnmarshalMeta    HandlerList
+	UnmarshalError   HandlerList
+	Retry            HandlerList
+	AfterRetry       HandlerList
+	CompleteAttempt  HandlerList
+	Complete         HandlerList
+}
+
+// Copy returns of this handler's lists.
+func (h *Handlers) Copy() Handlers {
+	return Handlers{
+		Validate:         h.Validate.copy(),
+		Build:            h.Build.copy(),
+		Sign:             h.Sign.copy(),
+		Send:             h.Send.copy(),
+		ValidateResponse: h.ValidateResponse.copy(),
+		Unmarshal:        h.Unmarshal.copy(),
+		UnmarshalStream:  h.UnmarshalStream.copy(),
+		UnmarshalError:   h.UnmarshalError.copy(),
+		UnmarshalMeta:    h.UnmarshalMeta.copy(),
+		Retry:            h.Retry.copy(),
+		AfterRetry:       h.AfterRetry.copy(),
+		CompleteAttempt:  h.CompleteAttempt.copy(),
+		Complete:         h.Complete.copy(),
+	}
+}
+
+// Clear removes callback functions for all handlers
+func (h *Handlers) Clear() {
+	h.Validate.Clear()
+	h.Build.Clear()
+	h.Send.Clear()
+	h.Sign.Clear()
+	h.Unmarshal.Clear()
+	h.UnmarshalStream.Clear()
+	h.UnmarshalMeta.Clear()
+	h.UnmarshalError.Clear()
+	h.ValidateResponse.Clear()
+	h.Retry.Clear()
+	h.AfterRetry.Clear()
+	h.CompleteAttempt.Clear()
+	h.Complete.Clear()
+}
+
+// IsEmpty returns if there are no handlers in any of the handlerlists.
+func (h *Handlers) IsEmpty() bool {
+	if h.Validate.Len() != 0 {
+		return false
+	}
+	if h.Build.Len() != 0 {
+		return false
+	}
+	if h.Send.Len() != 0 {
+		return false
+	}
+	if h.Sign.Len() != 0 {
+		return false
+	}
+	if h.Unmarshal.Len() != 0 {
+		return false
+	}
+	if h.UnmarshalStream.Len() != 0 {
+		return false
+	}
+	if h.UnmarshalMeta.Len() != 0 {
+		return false
+	}
+	if h.UnmarshalError.Len() != 0 {
+		return false
+	}
+	if h.ValidateResponse.Len() != 0 {
+		return false
+	}
+	if h.Retry.Len() != 0 {
+		return false
+	}
+	if h.AfterRetry.Len() != 0 {
+		return false
+	}
+	if h.CompleteAttempt.Len() != 0 {
+		return false
+	}
+	if h.Complete.Len() != 0 {
+		return false
+	}
+
+	return true
+}
+
+// A HandlerListRunItem represents an entry in the HandlerList which
+// is being run.
+type HandlerListRunItem struct {
+	Index   int
+	Handler NamedHandler
+	Request *Request
+}
+
+// A HandlerList manages zero or more handlers in a list.
+type HandlerList struct {
+	list []NamedHandler
+
+	// Called after each request handler in the list is called. If set
+	// and the func returns true the HandlerList will continue to iterate
+	// over the request handlers. If false is returned the HandlerList
+	// will stop iterating.
+	//
+	// Should be used if extra logic to be performed between each handler
+	// in the list. This can be used to terminate a list's iteration
+	// based on a condition such as error like, HandlerListStopOnError.
+	// Or for logging like HandlerListLogItem.
+	AfterEachFn func(item HandlerListRunItem) bool
+}
+
+// A NamedHandler is a struct that contains a name and function callback.
+type NamedHandler struct {
+	Name string
+	Fn   func(*Request)
+}
+
+// copy creates a copy of the handler list.
+func (l *HandlerList) copy() HandlerList {
+	n := HandlerList{
+		AfterEachFn: l.AfterEachFn,
+	}
+	if len(l.list) == 0 {
+		return n
+	}
+
+	n.list = append(make([]NamedHandler, 0, len(l.list)), l.list...)
+	return n
+}
+
+// Clear clears the handler list.
+func (l *HandlerList) Clear() {
+	l.list = l.list[0:0]
+}
+
+// Len returns the number of handlers in the list.
+func (l *HandlerList) Len() int {
+	return len(l.list)
+}
+
+// PushBack pushes handler f to the back of the handler list.
+func (l *HandlerList) PushBack(f func(*Request)) {
+	l.PushBackNamed(NamedHandler{"__anonymous", f})
+}
+
+// PushBackNamed pushes named handler f to the back of the handler list.
+func (l *HandlerList) PushBackNamed(n NamedHandler) {
+	if cap(l.list) == 0 {
+		l.list = make([]NamedHandler, 0, 5)
+	}
+	l.list = append(l.list, n)
+}
+
+// PushFront pushes handler f to the front of the handler list.
+func (l *HandlerList) PushFront(f func(*Request)) {
+	l.PushFrontNamed(NamedHandler{"__anonymous", f})
+}
+
+// PushFrontNamed pushes named handler f to the front of the handler list.
+func (l *HandlerList) PushFrontNamed(n NamedHandler) {
+	if cap(l.list) == len(l.list) {
+		// Allocating new list required
+		l.list = append([]NamedHandler{n}, l.list...)
+	} else {
+		// Enough room to prepend into list.
+		l.list = append(l.list, NamedHandler{})
+		copy(l.list[1:], l.list)
+		l.list[0] = n
+	}
+}
+
+// Remove removes a NamedHandler n
+func (l *HandlerList) Remove(n NamedHandler) {
+	l.RemoveByName(n.Name)
+}
+
+// RemoveByName removes a NamedHandler by name.
+func (l *HandlerList) RemoveByName(name string) {
+	for i := 0; i < len(l.list); i++ {
+		m := l.list[i]
+		if m.Name == name {
+			// Shift array preventing creating new arrays
+			copy(l.list[i:], l.list[i+1:])
+			l.list[len(l.list)-1] = NamedHandler{}
+			l.list = l.list[:len(l.list)-1]
+
+			// decrement list so next check to length is correct
+			i--
+		}
+	}
+}
+
+// SwapNamed will swap out any existing handlers with the same name as the
+// passed in NamedHandler returning true if handlers were swapped. False is
+// returned otherwise.
+func (l *HandlerList) SwapNamed(n NamedHandler) (swapped bool) {
+	for i := 0; i < len(l.list); i++ {
+		if l.list[i].Name == n.Name {
+			l.list[i].Fn = n.Fn
+			swapped = true
+		}
+	}
+
+	return swapped
+}
+
+// Swap will swap out all handlers matching the name passed in. The matched
+// handlers will be swapped in. True is returned if the handlers were swapped.
+func (l *HandlerList) Swap(name string, replace NamedHandler) bool {
+	var swapped bool
+
+	for i := 0; i < len(l.list); i++ {
+		if l.list[i].Name == name {
+			l.list[i] = replace
+			swapped = true
+		}
+	}
+
+	return swapped
+}
+
+// SetBackNamed will replace the named handler if it exists in the handler list.
+// If the handler does not exist the handler will be added to the end of the list.
+func (l *HandlerList) SetBackNamed(n NamedHandler) {
+	if !l.SwapNamed(n) {
+		l.PushBackNamed(n)
+	}
+}
+
+// SetFrontNamed will replace the named handler if it exists in the handler list.
+// If the handler does not exist the handler will be added to the beginning of
+// the list.
+func (l *HandlerList) SetFrontNamed(n NamedHandler) {
+	if !l.SwapNamed(n) {
+		l.PushFrontNamed(n)
+	}
+}
+
+// Run executes all handlers in the list with a given request object.
+func (l *HandlerList) Run(r *Request) {
+	for i, h := range l.list {
+		h.Fn(r)
+		item := HandlerListRunItem{
+			Index: i, Handler: h, Request: r,
+		}
+		if l.AfterEachFn != nil && !l.AfterEachFn(item) {
+			return
+		}
+	}
+}
+
+// HandlerListLogItem logs the request handler and the state of the
+// request's Error value. Always returns true to continue iterating
+// request handlers in a HandlerList.
+func HandlerListLogItem(item HandlerListRunItem) bool {
+	if item.Request.Config.Logger == nil {
+		return true
+	}
+	item.Request.Config.Logger.Log("DEBUG: RequestHandler",
+		item.Index, item.Handler.Name, item.Request.Error)
+
+	return true
+}
+
+// HandlerListStopOnError returns false to stop the HandlerList iterating
+// over request handlers if Request.Error is not nil. True otherwise
+// to continue iterating.
+func HandlerListStopOnError(item HandlerListRunItem) bool {
+	return item.Request.Error == nil
+}
+
+// WithAppendUserAgent will add a string to the user agent prefixed with a
+// single white space.
+func WithAppendUserAgent(s string) Option {
+	return func(r *Request) {
+		r.Handlers.Build.PushBack(func(r2 *Request) {
+			AddToUserAgent(r, s)
+		})
+	}
+}
+
+// MakeAddToUserAgentHandler will add the name/version pair to the User-Agent request
+// header. If the extra parameters are provided they will be added as metadata to the
+// name/version pair resulting in the following format.
+// "name/version (extra0; extra1; ...)"
+// The user agent part will be concatenated with this current request's user agent string.
+func MakeAddToUserAgentHandler(name, version string, extra ...string) func(*Request) {
+	ua := fmt.Sprintf("%s/%s", name, version)
+	if len(extra) > 0 {
+		ua += fmt.Sprintf(" (%s)", strings.Join(extra, "; "))
+	}
+	return func(r *Request) {
+		AddToUserAgent(r, ua)
+	}
+}
+
+// MakeAddToUserAgentFreeFormHandler adds the input to the User-Agent request header.
+// The input string will be concatenated with the current request's user agent string.
+func MakeAddToUserAgentFreeFormHandler(s string) func(*Request) {
+	return func(r *Request) {
+		AddToUserAgent(r, s)
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/request/http_request.go

@@ -0,0 +1,24 @@
+package request
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+)
+
+func copyHTTPRequest(r *http.Request, body io.ReadCloser) *http.Request {
+	req := new(http.Request)
+	*req = *r
+	req.URL = &url.URL{}
+	*req.URL = *r.URL
+	req.Body = body
+
+	req.Header = http.Header{}
+	for k, v := range r.Header {
+		for _, vv := range v {
+			req.Header.Add(k, vv)
+		}
+	}
+
+	return req
+}

vendor/github.com/aws/aws-sdk-go/aws/request/offset_reader.go

@@ -0,0 +1,65 @@
+package request
+
+import (
+	"io"
+	"sync"
+
+	"github.com/aws/aws-sdk-go/internal/sdkio"
+)
+
+// offsetReader is a thread-safe io.ReadCloser to prevent racing
+// with retrying requests
+type offsetReader struct {
+	buf    io.ReadSeeker
+	lock   sync.Mutex
+	closed bool
+}
+
+func newOffsetReader(buf io.ReadSeeker, offset int64) (*offsetReader, error) {
+	reader := &offsetReader{}
+	_, err := buf.Seek(offset, sdkio.SeekStart)
+	if err != nil {
+		return nil, err
+	}
+
+	reader.buf = buf
+	return reader, nil
+}
+
+// Close will close the instance of the offset reader's access to
+// the underlying io.ReadSeeker.
+func (o *offsetReader) Close() error {
+	o.lock.Lock()
+	defer o.lock.Unlock()
+	o.closed = true
+	return nil
+}
+
+// Read is a thread-safe read of the underlying io.ReadSeeker
+func (o *offsetReader) Read(p []byte) (int, error) {
+	o.lock.Lock()
+	defer o.lock.Unlock()
+
+	if o.closed {
+		return 0, io.EOF
+	}
+
+	return o.buf.Read(p)
+}
+
+// Seek is a thread-safe seeking operation.
+func (o *offsetReader) Seek(offset int64, whence int) (int64, error) {
+	o.lock.Lock()
+	defer o.lock.Unlock()
+
+	return o.buf.Seek(offset, whence)
+}
+
+// CloseAndCopy will return a new offsetReader with a copy of the old buffer
+// and close the old buffer.
+func (o *offsetReader) CloseAndCopy(offset int64) (*offsetReader, error) {
+	if err := o.Close(); err != nil {
+		return nil, err
+	}
+	return newOffsetReader(o.buf, offset)
+}

vendor/github.com/aws/aws-sdk-go/aws/request/request.go

@@ -0,0 +1,670 @@
+package request
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"reflect"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client/metadata"
+	"github.com/aws/aws-sdk-go/internal/sdkio"
+)
+
+const (
+	// ErrCodeSerialization is the serialization error code that is received
+	// during protocol unmarshaling.
+	ErrCodeSerialization = "SerializationError"
+
+	// ErrCodeRead is an error that is returned during HTTP reads.
+	ErrCodeRead = "ReadError"
+
+	// ErrCodeResponseTimeout is the connection timeout error that is received
+	// during body reads.
+	ErrCodeResponseTimeout = "ResponseTimeout"
+
+	// ErrCodeInvalidPresignExpire is returned when the expire time provided to
+	// presign is invalid
+	ErrCodeInvalidPresignExpire = "InvalidPresignExpireError"
+
+	// CanceledErrorCode is the error code that will be returned by an
+	// API request that was canceled. Requests given a aws.Context may
+	// return this error when canceled.
+	CanceledErrorCode = "RequestCanceled"
+)
+
+// A Request is the service request to be made.
+type Request struct {
+	Config     aws.Config
+	ClientInfo metadata.ClientInfo
+	Handlers   Handlers
+
+	Retryer
+	AttemptTime            time.Time
+	Time                   time.Time
+	Operation              *Operation
+	HTTPRequest            *http.Request
+	HTTPResponse           *http.Response
+	Body                   io.ReadSeeker
+	BodyStart              int64 // offset from beginning of Body that the request body starts
+	Params                 interface{}
+	Error                  error
+	Data                   interface{}
+	RequestID              string
+	RetryCount             int
+	Retryable              *bool
+	RetryDelay             time.Duration
+	NotHoist               bool
+	SignedHeaderVals       http.Header
+	LastSignedAt           time.Time
+	DisableFollowRedirects bool
+
+	// Additional API error codes that should be retried. IsErrorRetryable
+	// will consider these codes in addition to its built in cases.
+	RetryErrorCodes []string
+
+	// Additional API error codes that should be retried with throttle backoff
+	// delay. IsErrorThrottle will consider these codes in addition to its
+	// built in cases.
+	ThrottleErrorCodes []string
+
+	// A value greater than 0 instructs the request to be signed as Presigned URL
+	// You should not set this field directly. Instead use Request's
+	// Presign or PresignRequest methods.
+	ExpireTime time.Duration
+
+	context aws.Context
+
+	built bool
+
+	// Need to persist an intermediate body between the input Body and HTTP
+	// request body because the HTTP Client's transport can maintain a reference
+	// to the HTTP request's body after the client has returned. This value is
+	// safe to use concurrently and wrap the input Body for each HTTP request.
+	safeBody *offsetReader
+}
+
+// An Operation is the service API operation to be made.
+type Operation struct {
+	Name       string
+	HTTPMethod string
+	HTTPPath   string
+	*Paginator
+
+	BeforePresignFn func(r *Request) error
+}
+
+// New returns a new Request pointer for the service API
+// operation and parameters.
+//
+// Params is any value of input parameters to be the request payload.
+// Data is pointer value to an object which the request's response
+// payload will be deserialized to.
+func New(cfg aws.Config, clientInfo metadata.ClientInfo, handlers Handlers,
+	retryer Retryer, operation *Operation, params interface{}, data interface{}) *Request {
+
+	method := operation.HTTPMethod
+	if method == "" {
+		method = "POST"
+	}
+
+	httpReq, _ := http.NewRequest(method, "", nil)
+
+	var err error
+	httpReq.URL, err = url.Parse(clientInfo.Endpoint + operation.HTTPPath)
+	if err != nil {
+		httpReq.URL = &url.URL{}
+		err = awserr.New("InvalidEndpointURL", "invalid endpoint uri", err)
+	}
+
+	SanitizeHostForHeader(httpReq)
+
+	r := &Request{
+		Config:     cfg,
+		ClientInfo: clientInfo,
+		Handlers:   handlers.Copy(),
+
+		Retryer:     retryer,
+		Time:        time.Now(),
+		ExpireTime:  0,
+		Operation:   operation,
+		HTTPRequest: httpReq,
+		Body:        nil,
+		Params:      params,
+		Error:       err,
+		Data:        data,
+	}
+	r.SetBufferBody([]byte{})
+
+	return r
+}
+
+// A Option is a functional option that can augment or modify a request when
+// using a WithContext API operation method.
+type Option func(*Request)
+
+// WithGetResponseHeader builds a request Option which will retrieve a single
+// header value from the HTTP Response. If there are multiple values for the
+// header key use WithGetResponseHeaders instead to access the http.Header
+// map directly. The passed in val pointer must be non-nil.
+//
+// This Option can be used multiple times with a single API operation.
+//
+//    var id2, versionID string
+//    svc.PutObjectWithContext(ctx, params,
+//        request.WithGetResponseHeader("x-amz-id-2", &id2),
+//        request.WithGetResponseHeader("x-amz-version-id", &versionID),
+//    )
+func WithGetResponseHeader(key string, val *string) Option {
+	return func(r *Request) {
+		r.Handlers.Complete.PushBack(func(req *Request) {
+			*val = req.HTTPResponse.Header.Get(key)
+		})
+	}
+}
+
+// WithGetResponseHeaders builds a request Option which will retrieve the
+// headers from the HTTP response and assign them to the passed in headers
+// variable. The passed in headers pointer must be non-nil.
+//
+//    var headers http.Header
+//    svc.PutObjectWithContext(ctx, params, request.WithGetResponseHeaders(&headers))
+func WithGetResponseHeaders(headers *http.Header) Option {
+	return func(r *Request) {
+		r.Handlers.Complete.PushBack(func(req *Request) {
+			*headers = req.HTTPResponse.Header
+		})
+	}
+}
+
+// WithLogLevel is a request option that will set the request to use a specific
+// log level when the request is made.
+//
+//     svc.PutObjectWithContext(ctx, params, request.WithLogLevel(aws.LogDebugWithHTTPBody)
+func WithLogLevel(l aws.LogLevelType) Option {
+	return func(r *Request) {
+		r.Config.LogLevel = aws.LogLevel(l)
+	}
+}
+
+// ApplyOptions will apply each option to the request calling them in the order
+// the were provided.
+func (r *Request) ApplyOptions(opts ...Option) {
+	for _, opt := range opts {
+		opt(r)
+	}
+}
+
+// Context will always returns a non-nil context. If Request does not have a
+// context aws.BackgroundContext will be returned.
+func (r *Request) Context() aws.Context {
+	if r.context != nil {
+		return r.context
+	}
+	return aws.BackgroundContext()
+}
+
+// SetContext adds a Context to the current request that can be used to cancel
+// a in-flight request. The Context value must not be nil, or this method will
+// panic.
+//
+// Unlike http.Request.WithContext, SetContext does not return a copy of the
+// Request. It is not safe to use use a single Request value for multiple
+// requests. A new Request should be created for each API operation request.
+//
+// Go 1.6 and below:
+// The http.Request's Cancel field will be set to the Done() value of
+// the context. This will overwrite the Cancel field's value.
+//
+// Go 1.7 and above:
+// The http.Request.WithContext will be used to set the context on the underlying
+// http.Request. This will create a shallow copy of the http.Request. The SDK
+// may create sub contexts in the future for nested requests such as retries.
+func (r *Request) SetContext(ctx aws.Context) {
+	if ctx == nil {
+		panic("context cannot be nil")
+	}
+	setRequestContext(r, ctx)
+}
+
+// WillRetry returns if the request's can be retried.
+func (r *Request) WillRetry() bool {
+	if !aws.IsReaderSeekable(r.Body) && r.HTTPRequest.Body != NoBody {
+		return false
+	}
+	return r.Error != nil && aws.BoolValue(r.Retryable) && r.RetryCount < r.MaxRetries()
+}
+
+func fmtAttemptCount(retryCount, maxRetries int) string {
+	return fmt.Sprintf("attempt %v/%v", retryCount, maxRetries)
+}
+
+// ParamsFilled returns if the request's parameters have been populated
+// and the parameters are valid. False is returned if no parameters are
+// provided or invalid.
+func (r *Request) ParamsFilled() bool {
+	return r.Params != nil && reflect.ValueOf(r.Params).Elem().IsValid()
+}
+
+// DataFilled returns true if the request's data for response deserialization
+// target has been set and is a valid. False is returned if data is not
+// set, or is invalid.
+func (r *Request) DataFilled() bool {
+	return r.Data != nil && reflect.ValueOf(r.Data).Elem().IsValid()
+}
+
+// SetBufferBody will set the request's body bytes that will be sent to
+// the service API.
+func (r *Request) SetBufferBody(buf []byte) {
+	r.SetReaderBody(bytes.NewReader(buf))
+}
+
+// SetStringBody sets the body of the request to be backed by a string.
+func (r *Request) SetStringBody(s string) {
+	r.SetReaderBody(strings.NewReader(s))
+}
+
+// SetReaderBody will set the request's body reader.
+func (r *Request) SetReaderBody(reader io.ReadSeeker) {
+	r.Body = reader
+
+	if aws.IsReaderSeekable(reader) {
+		var err error
+		// Get the Bodies current offset so retries will start from the same
+		// initial position.
+		r.BodyStart, err = reader.Seek(0, sdkio.SeekCurrent)
+		if err != nil {
+			r.Error = awserr.New(ErrCodeSerialization,
+				"failed to determine start of request body", err)
+			return
+		}
+	}
+	r.ResetBody()
+}
+
+// Presign returns the request's signed URL. Error will be returned
+// if the signing fails. The expire parameter is only used for presigned Amazon
+// S3 API requests. All other AWS services will use a fixed expiration
+// time of 15 minutes.
+//
+// It is invalid to create a presigned URL with a expire duration 0 or less. An
+// error is returned if expire duration is 0 or less.
+func (r *Request) Presign(expire time.Duration) (string, error) {
+	r = r.copy()
+
+	// Presign requires all headers be hoisted. There is no way to retrieve
+	// the signed headers not hoisted without this. Making the presigned URL
+	// useless.
+	r.NotHoist = false
+
+	u, _, err := getPresignedURL(r, expire)
+	return u, err
+}
+
+// PresignRequest behaves just like presign, with the addition of returning a
+// set of headers that were signed. The expire parameter is only used for
+// presigned Amazon S3 API requests. All other AWS services will use a fixed
+// expiration time of 15 minutes.
+//
+// It is invalid to create a presigned URL with a expire duration 0 or less. An
+// error is returned if expire duration is 0 or less.
+//
+// Returns the URL string for the API operation with signature in the query string,
+// and the HTTP headers that were included in the signature. These headers must
+// be included in any HTTP request made with the presigned URL.
+//
+// To prevent hoisting any headers to the query string set NotHoist to true on
+// this Request value prior to calling PresignRequest.
+func (r *Request) PresignRequest(expire time.Duration) (string, http.Header, error) {
+	r = r.copy()
+	return getPresignedURL(r, expire)
+}
+
+// IsPresigned returns true if the request represents a presigned API url.
+func (r *Request) IsPresigned() bool {
+	return r.ExpireTime != 0
+}
+
+func getPresignedURL(r *Request, expire time.Duration) (string, http.Header, error) {
+	if expire <= 0 {
+		return "", nil, awserr.New(
+			ErrCodeInvalidPresignExpire,
+			"presigned URL requires an expire duration greater than 0",
+			nil,
+		)
+	}
+
+	r.ExpireTime = expire
+
+	if r.Operation.BeforePresignFn != nil {
+		if err := r.Operation.BeforePresignFn(r); err != nil {
+			return "", nil, err
+		}
+	}
+
+	if err := r.Sign(); err != nil {
+		return "", nil, err
+	}
+
+	return r.HTTPRequest.URL.String(), r.SignedHeaderVals, nil
+}
+
+const (
+	notRetrying = "not retrying"
+)
+
+func debugLogReqError(r *Request, stage, retryStr string, err error) {
+	if !r.Config.LogLevel.Matches(aws.LogDebugWithRequestErrors) {
+		return
+	}
+
+	r.Config.Logger.Log(fmt.Sprintf("DEBUG: %s %s/%s failed, %s, error %v",
+		stage, r.ClientInfo.ServiceName, r.Operation.Name, retryStr, err))
+}
+
+// Build will build the request's object so it can be signed and sent
+// to the service. Build will also validate all the request's parameters.
+// Any additional build Handlers set on this request will be run
+// in the order they were set.
+//
+// The request will only be built once. Multiple calls to build will have
+// no effect.
+//
+// If any Validate or Build errors occur the build will stop and the error
+// which occurred will be returned.
+func (r *Request) Build() error {
+	if !r.built {
+		r.Handlers.Validate.Run(r)
+		if r.Error != nil {
+			debugLogReqError(r, "Validate Request", notRetrying, r.Error)
+			return r.Error
+		}
+		r.Handlers.Build.Run(r)
+		if r.Error != nil {
+			debugLogReqError(r, "Build Request", notRetrying, r.Error)
+			return r.Error
+		}
+		r.built = true
+	}
+
+	return r.Error
+}
+
+// Sign will sign the request, returning error if errors are encountered.
+//
+// Sign will build the request prior to signing. All Sign Handlers will
+// be executed in the order they were set.
+func (r *Request) Sign() error {
+	r.Build()
+	if r.Error != nil {
+		debugLogReqError(r, "Build Request", notRetrying, r.Error)
+		return r.Error
+	}
+
+	r.Handlers.Sign.Run(r)
+	return r.Error
+}
+
+func (r *Request) getNextRequestBody() (body io.ReadCloser, err error) {
+	if r.safeBody != nil {
+		r.safeBody.Close()
+	}
+
+	r.safeBody, err = newOffsetReader(r.Body, r.BodyStart)
+	if err != nil {
+		return nil, awserr.New(ErrCodeSerialization,
+			"failed to get next request body reader", err)
+	}
+
+	// Go 1.8 tightened and clarified the rules code needs to use when building
+	// requests with the http package. Go 1.8 removed the automatic detection
+	// of if the Request.Body was empty, or actually had bytes in it. The SDK
+	// always sets the Request.Body even if it is empty and should not actually
+	// be sent. This is incorrect.
+	//
+	// Go 1.8 did add a http.NoBody value that the SDK can use to tell the http
+	// client that the request really should be sent without a body. The
+	// Request.Body cannot be set to nil, which is preferable, because the
+	// field is exported and could introduce nil pointer dereferences for users
+	// of the SDK if they used that field.
+	//
+	// Related golang/go#18257
+	l, err := aws.SeekerLen(r.Body)
+	if err != nil {
+		return nil, awserr.New(ErrCodeSerialization,
+			"failed to compute request body size", err)
+	}
+
+	if l == 0 {
+		body = NoBody
+	} else if l > 0 {
+		body = r.safeBody
+	} else {
+		// Hack to prevent sending bodies for methods where the body
+		// should be ignored by the server. Sending bodies on these
+		// methods without an associated ContentLength will cause the
+		// request to socket timeout because the server does not handle
+		// Transfer-Encoding: chunked bodies for these methods.
+		//
+		// This would only happen if a aws.ReaderSeekerCloser was used with
+		// a io.Reader that was not also an io.Seeker, or did not implement
+		// Len() method.
+		switch r.Operation.HTTPMethod {
+		case "GET", "HEAD", "DELETE":
+			body = NoBody
+		default:
+			body = r.safeBody
+		}
+	}
+
+	return body, nil
+}
+
+// GetBody will return an io.ReadSeeker of the Request's underlying
+// input body with a concurrency safe wrapper.
+func (r *Request) GetBody() io.ReadSeeker {
+	return r.safeBody
+}
+
+// Send will send the request, returning error if errors are encountered.
+//
+// Send will sign the request prior to sending. All Send Handlers will
+// be executed in the order they were set.
+//
+// Canceling a request is non-deterministic. If a request has been canceled,
+// then the transport will choose, randomly, one of the state channels during
+// reads or getting the connection.
+//
+// readLoop() and getConn(req *Request, cm connectMethod)
+// https://github.com/golang/go/blob/master/src/net/http/transport.go
+//
+// Send will not close the request.Request's body.
+func (r *Request) Send() error {
+	defer func() {
+		// Regardless of success or failure of the request trigger the Complete
+		// request handlers.
+		r.Handlers.Complete.Run(r)
+	}()
+
+	if err := r.Error; err != nil {
+		return err
+	}
+
+	for {
+		r.Error = nil
+		r.AttemptTime = time.Now()
+
+		if err := r.Sign(); err != nil {
+			debugLogReqError(r, "Sign Request", notRetrying, err)
+			return err
+		}
+
+		if err := r.sendRequest(); err == nil {
+			return nil
+		}
+		r.Handlers.Retry.Run(r)
+		r.Handlers.AfterRetry.Run(r)
+
+		if r.Error != nil || !aws.BoolValue(r.Retryable) {
+			return r.Error
+		}
+
+		if err := r.prepareRetry(); err != nil {
+			r.Error = err
+			return err
+		}
+	}
+}
+
+func (r *Request) prepareRetry() error {
+	if r.Config.LogLevel.Matches(aws.LogDebugWithRequestRetries) {
+		r.Config.Logger.Log(fmt.Sprintf("DEBUG: Retrying Request %s/%s, attempt %d",
+			r.ClientInfo.ServiceName, r.Operation.Name, r.RetryCount))
+	}
+
+	// The previous http.Request will have a reference to the r.Body
+	// and the HTTP Client's Transport may still be reading from
+	// the request's body even though the Client's Do returned.
+	r.HTTPRequest = copyHTTPRequest(r.HTTPRequest, nil)
+	r.ResetBody()
+	if err := r.Error; err != nil {
+		return awserr.New(ErrCodeSerialization,
+			"failed to prepare body for retry", err)
+
+	}
+
+	// Closing response body to ensure that no response body is leaked
+	// between retry attempts.
+	if r.HTTPResponse != nil && r.HTTPResponse.Body != nil {
+		r.HTTPResponse.Body.Close()
+	}
+
+	return nil
+}
+
+func (r *Request) sendRequest() (sendErr error) {
+	defer r.Handlers.CompleteAttempt.Run(r)
+
+	r.Retryable = nil
+	r.Handlers.Send.Run(r)
+	if r.Error != nil {
+		debugLogReqError(r, "Send Request",
+			fmtAttemptCount(r.RetryCount, r.MaxRetries()),
+			r.Error)
+		return r.Error
+	}
+
+	r.Handlers.UnmarshalMeta.Run(r)
+	r.Handlers.ValidateResponse.Run(r)
+	if r.Error != nil {
+		r.Handlers.UnmarshalError.Run(r)
+		debugLogReqError(r, "Validate Response",
+			fmtAttemptCount(r.RetryCount, r.MaxRetries()),
+			r.Error)
+		return r.Error
+	}
+
+	r.Handlers.Unmarshal.Run(r)
+	if r.Error != nil {
+		debugLogReqError(r, "Unmarshal Response",
+			fmtAttemptCount(r.RetryCount, r.MaxRetries()),
+			r.Error)
+		return r.Error
+	}
+
+	return nil
+}
+
+// copy will copy a request which will allow for local manipulation of the
+// request.
+func (r *Request) copy() *Request {
+	req := &Request{}
+	*req = *r
+	req.Handlers = r.Handlers.Copy()
+	op := *r.Operation
+	req.Operation = &op
+	return req
+}
+
+// AddToUserAgent adds the string to the end of the request's current user agent.
+func AddToUserAgent(r *Request, s string) {
+	curUA := r.HTTPRequest.Header.Get("User-Agent")
+	if len(curUA) > 0 {
+		s = curUA + " " + s
+	}
+	r.HTTPRequest.Header.Set("User-Agent", s)
+}
+
+// SanitizeHostForHeader removes default port from host and updates request.Host
+func SanitizeHostForHeader(r *http.Request) {
+	host := getHost(r)
+	port := portOnly(host)
+	if port != "" && isDefaultPort(r.URL.Scheme, port) {
+		r.Host = stripPort(host)
+	}
+}
+
+// Returns host from request
+func getHost(r *http.Request) string {
+	if r.Host != "" {
+		return r.Host
+	}
+
+	return r.URL.Host
+}
+
+// Hostname returns u.Host, without any port number.
+//
+// If Host is an IPv6 literal with a port number, Hostname returns the
+// IPv6 literal without the square brackets. IPv6 literals may include
+// a zone identifier.
+//
+// Copied from the Go 1.8 standard library (net/url)
+func stripPort(hostport string) string {
+	colon := strings.IndexByte(hostport, ':')
+	if colon == -1 {
+		return hostport
+	}
+	if i := strings.IndexByte(hostport, ']'); i != -1 {
+		return strings.TrimPrefix(hostport[:i], "[")
+	}
+	return hostport[:colon]
+}
+
+// Port returns the port part of u.Host, without the leading colon.
+// If u.Host doesn't contain a port, Port returns an empty string.
+//
+// Copied from the Go 1.8 standard library (net/url)
+func portOnly(hostport string) string {
+	colon := strings.IndexByte(hostport, ':')
+	if colon == -1 {
+		return ""
+	}
+	if i := strings.Index(hostport, "]:"); i != -1 {
+		return hostport[i+len("]:"):]
+	}
+	if strings.Contains(hostport, "]") {
+		return ""
+	}
+	return hostport[colon+len(":"):]
+}
+
+// Returns true if the specified URI is using the standard port
+// (i.e. port 80 for HTTP URIs or 443 for HTTPS URIs)
+func isDefaultPort(scheme, port string) bool {
+	if port == "" {
+		return true
+	}
+
+	lowerCaseScheme := strings.ToLower(scheme)
+	if (lowerCaseScheme == "http" && port == "80") || (lowerCaseScheme == "https" && port == "443") {
+		return true
+	}
+
+	return false
+}

vendor/github.com/aws/aws-sdk-go/aws/request/request_1_7.go

@@ -0,0 +1,39 @@
+// +build !go1.8
+
+package request
+
+import "io"
+
+// NoBody is an io.ReadCloser with no bytes. Read always returns EOF
+// and Close always returns nil. It can be used in an outgoing client
+// request to explicitly signal that a request has zero bytes.
+// An alternative, however, is to simply set Request.Body to nil.
+//
+// Copy of Go 1.8 NoBody type from net/http/http.go
+type noBody struct{}
+
+func (noBody) Read([]byte) (int, error)         { return 0, io.EOF }
+func (noBody) Close() error                     { return nil }
+func (noBody) WriteTo(io.Writer) (int64, error) { return 0, nil }
+
+// NoBody is an empty reader that will trigger the Go HTTP client to not include
+// and body in the HTTP request.
+var NoBody = noBody{}
+
+// ResetBody rewinds the request body back to its starting position, and
+// sets the HTTP Request body reference. When the body is read prior
+// to being sent in the HTTP request it will need to be rewound.
+//
+// ResetBody will automatically be called by the SDK's build handler, but if
+// the request is being used directly ResetBody must be called before the request
+// is Sent.  SetStringBody, SetBufferBody, and SetReaderBody will automatically
+// call ResetBody.
+func (r *Request) ResetBody() {
+	body, err := r.getNextRequestBody()
+	if err != nil {
+		r.Error = err
+		return
+	}
+
+	r.HTTPRequest.Body = body
+}

vendor/github.com/aws/aws-sdk-go/aws/request/request_1_8.go

@@ -0,0 +1,36 @@
+// +build go1.8
+
+package request
+
+import (
+	"net/http"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+// NoBody is a http.NoBody reader instructing Go HTTP client to not include
+// and body in the HTTP request.
+var NoBody = http.NoBody
+
+// ResetBody rewinds the request body back to its starting position, and
+// sets the HTTP Request body reference. When the body is read prior
+// to being sent in the HTTP request it will need to be rewound.
+//
+// ResetBody will automatically be called by the SDK's build handler, but if
+// the request is being used directly ResetBody must be called before the request
+// is Sent.  SetStringBody, SetBufferBody, and SetReaderBody will automatically
+// call ResetBody.
+//
+// Will also set the Go 1.8's http.Request.GetBody member to allow retrying
+// PUT/POST redirects.
+func (r *Request) ResetBody() {
+	body, err := r.getNextRequestBody()
+	if err != nil {
+		r.Error = awserr.New(ErrCodeSerialization,
+			"failed to reset request body", err)
+		return
+	}
+
+	r.HTTPRequest.Body = body
+	r.HTTPRequest.GetBody = r.getNextRequestBody
+}

vendor/github.com/aws/aws-sdk-go/aws/request/request_context.go

@@ -0,0 +1,14 @@
+// +build go1.7
+
+package request
+
+import "github.com/aws/aws-sdk-go/aws"
+
+// setContext updates the Request to use the passed in context for cancellation.
+// Context will also be used for request retry delay.
+//
+// Creates shallow copy of the http.Request with the WithContext method.
+func setRequestContext(r *Request, ctx aws.Context) {
+	r.context = ctx
+	r.HTTPRequest = r.HTTPRequest.WithContext(ctx)
+}

vendor/github.com/aws/aws-sdk-go/aws/request/request_context_1_6.go

@@ -0,0 +1,14 @@
+// +build !go1.7
+
+package request
+
+import "github.com/aws/aws-sdk-go/aws"
+
+// setContext updates the Request to use the passed in context for cancellation.
+// Context will also be used for request retry delay.
+//
+// Creates shallow copy of the http.Request with the WithContext method.
+func setRequestContext(r *Request, ctx aws.Context) {
+	r.context = ctx
+	r.HTTPRequest.Cancel = ctx.Done()
+}

vendor/github.com/aws/aws-sdk-go/aws/request/request_pagination.go

@@ -0,0 +1,264 @@
+package request
+
+import (
+	"reflect"
+	"sync/atomic"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awsutil"
+)
+
+// A Pagination provides paginating of SDK API operations which are paginatable.
+// Generally you should not use this type directly, but use the "Pages" API
+// operations method to automatically perform pagination for you. Such as,
+// "S3.ListObjectsPages", and "S3.ListObjectsPagesWithContext" methods.
+//
+// Pagination differs from a Paginator type in that pagination is the type that
+// does the pagination between API operations, and Paginator defines the
+// configuration that will be used per page request.
+//
+//     cont := true
+//     for p.Next() && cont {
+//         data := p.Page().(*s3.ListObjectsOutput)
+//         // process the page's data
+//     }
+//     return p.Err()
+//
+// See service client API operation Pages methods for examples how the SDK will
+// use the Pagination type.
+type Pagination struct {
+	// Function to return a Request value for each pagination request.
+	// Any configuration or handlers that need to be applied to the request
+	// prior to getting the next page should be done here before the request
+	// returned.
+	//
+	// NewRequest should always be built from the same API operations. It is
+	// undefined if different API operations are returned on subsequent calls.
+	NewRequest func() (*Request, error)
+	// EndPageOnSameToken, when enabled, will allow the paginator to stop on
+	// token that are the same as its previous tokens.
+	EndPageOnSameToken bool
+
+	started    bool
+	prevTokens []interface{}
+	nextTokens []interface{}
+
+	err     error
+	curPage interface{}
+}
+
+// HasNextPage will return true if Pagination is able to determine that the API
+// operation has additional pages. False will be returned if there are no more
+// pages remaining.
+//
+// Will always return true if Next has not been called yet.
+func (p *Pagination) HasNextPage() bool {
+	if !p.started {
+		return true
+	}
+
+	hasNextPage := len(p.nextTokens) != 0
+	if p.EndPageOnSameToken {
+		return hasNextPage && !awsutil.DeepEqual(p.nextTokens, p.prevTokens)
+	}
+	return hasNextPage
+}
+
+// Err returns the error Pagination encountered when retrieving the next page.
+func (p *Pagination) Err() error {
+	return p.err
+}
+
+// Page returns the current page. Page should only be called after a successful
+// call to Next. It is undefined what Page will return if Page is called after
+// Next returns false.
+func (p *Pagination) Page() interface{} {
+	return p.curPage
+}
+
+// Next will attempt to retrieve the next page for the API operation. When a page
+// is retrieved true will be returned. If the page cannot be retrieved, or there
+// are no more pages false will be returned.
+//
+// Use the Page method to retrieve the current page data. The data will need
+// to be cast to the API operation's output type.
+//
+// Use the Err method to determine if an error occurred if Page returns false.
+func (p *Pagination) Next() bool {
+	if !p.HasNextPage() {
+		return false
+	}
+
+	req, err := p.NewRequest()
+	if err != nil {
+		p.err = err
+		return false
+	}
+
+	if p.started {
+		for i, intok := range req.Operation.InputTokens {
+			awsutil.SetValueAtPath(req.Params, intok, p.nextTokens[i])
+		}
+	}
+	p.started = true
+
+	err = req.Send()
+	if err != nil {
+		p.err = err
+		return false
+	}
+
+	p.prevTokens = p.nextTokens
+	p.nextTokens = req.nextPageTokens()
+	p.curPage = req.Data
+
+	return true
+}
+
+// A Paginator is the configuration data that defines how an API operation
+// should be paginated. This type is used by the API service models to define
+// the generated pagination config for service APIs.
+//
+// The Pagination type is what provides iterating between pages of an API. It
+// is only used to store the token metadata the SDK should use for performing
+// pagination.
+type Paginator struct {
+	InputTokens     []string
+	OutputTokens    []string
+	LimitToken      string
+	TruncationToken string
+}
+
+// nextPageTokens returns the tokens to use when asking for the next page of data.
+func (r *Request) nextPageTokens() []interface{} {
+	if r.Operation.Paginator == nil {
+		return nil
+	}
+	if r.Operation.TruncationToken != "" {
+		tr, _ := awsutil.ValuesAtPath(r.Data, r.Operation.TruncationToken)
+		if len(tr) == 0 {
+			return nil
+		}
+
+		switch v := tr[0].(type) {
+		case *bool:
+			if !aws.BoolValue(v) {
+				return nil
+			}
+		case bool:
+			if !v {
+				return nil
+			}
+		}
+	}
+
+	tokens := []interface{}{}
+	tokenAdded := false
+	for _, outToken := range r.Operation.OutputTokens {
+		vs, _ := awsutil.ValuesAtPath(r.Data, outToken)
+		if len(vs) == 0 {
+			tokens = append(tokens, nil)
+			continue
+		}
+		v := vs[0]
+
+		switch tv := v.(type) {
+		case *string:
+			if len(aws.StringValue(tv)) == 0 {
+				tokens = append(tokens, nil)
+				continue
+			}
+		case string:
+			if len(tv) == 0 {
+				tokens = append(tokens, nil)
+				continue
+			}
+		}
+
+		tokenAdded = true
+		tokens = append(tokens, v)
+	}
+	if !tokenAdded {
+		return nil
+	}
+
+	return tokens
+}
+
+// Ensure a deprecated item is only logged once instead of each time its used.
+func logDeprecatedf(logger aws.Logger, flag *int32, msg string) {
+	if logger == nil {
+		return
+	}
+	if atomic.CompareAndSwapInt32(flag, 0, 1) {
+		logger.Log(msg)
+	}
+}
+
+var (
+	logDeprecatedHasNextPage int32
+	logDeprecatedNextPage    int32
+	logDeprecatedEachPage    int32
+)
+
+// HasNextPage returns true if this request has more pages of data available.
+//
+// Deprecated Use Pagination type for configurable pagination of API operations
+func (r *Request) HasNextPage() bool {
+	logDeprecatedf(r.Config.Logger, &logDeprecatedHasNextPage,
+		"Request.HasNextPage deprecated. Use Pagination type for configurable pagination of API operations")
+
+	return len(r.nextPageTokens()) > 0
+}
+
+// NextPage returns a new Request that can be executed to return the next
+// page of result data. Call .Send() on this request to execute it.
+//
+// Deprecated Use Pagination type for configurable pagination of API operations
+func (r *Request) NextPage() *Request {
+	logDeprecatedf(r.Config.Logger, &logDeprecatedNextPage,
+		"Request.NextPage deprecated. Use Pagination type for configurable pagination of API operations")
+
+	tokens := r.nextPageTokens()
+	if len(tokens) == 0 {
+		return nil
+	}
+
+	data := reflect.New(reflect.TypeOf(r.Data).Elem()).Interface()
+	nr := New(r.Config, r.ClientInfo, r.Handlers, r.Retryer, r.Operation, awsutil.CopyOf(r.Params), data)
+	for i, intok := range nr.Operation.InputTokens {
+		awsutil.SetValueAtPath(nr.Params, intok, tokens[i])
+	}
+	return nr
+}
+
+// EachPage iterates over each page of a paginated request object. The fn
+// parameter should be a function with the following sample signature:
+//
+//   func(page *T, lastPage bool) bool {
+//       return true // return false to stop iterating
+//   }
+//
+// Where "T" is the structure type matching the output structure of the given
+// operation. For example, a request object generated by
+// DynamoDB.ListTablesRequest() would expect to see dynamodb.ListTablesOutput
+// as the structure "T". The lastPage value represents whether the page is
+// the last page of data or not. The return value of this function should
+// return true to keep iterating or false to stop.
+//
+// Deprecated Use Pagination type for configurable pagination of API operations
+func (r *Request) EachPage(fn func(data interface{}, isLastPage bool) (shouldContinue bool)) error {
+	logDeprecatedf(r.Config.Logger, &logDeprecatedEachPage,
+		"Request.EachPage deprecated. Use Pagination type for configurable pagination of API operations")
+
+	for page := r; page != nil; page = page.NextPage() {
+		if err := page.Send(); err != nil {
+			return err
+		}
+		if getNextPage := fn(page.Data, !page.HasNextPage()); !getNextPage {
+			return page.Error
+		}
+	}
+
+	return nil
+}

vendor/github.com/aws/aws-sdk-go/aws/request/retryer.go

@@ -0,0 +1,266 @@
+package request
+
+import (
+	"net"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+// Retryer provides the interface drive the SDK's request retry behavior. The
+// Retryer implementation is responsible for implementing exponential backoff,
+// and determine if a request API error should be retried.
+//
+// client.DefaultRetryer is the SDK's default implementation of the Retryer. It
+// uses the which uses the Request.IsErrorRetryable and Request.IsErrorThrottle
+// methods to determine if the request is retried.
+type Retryer interface {
+	// RetryRules return the retry delay that should be used by the SDK before
+	// making another request attempt for the failed request.
+	RetryRules(*Request) time.Duration
+
+	// ShouldRetry returns if the failed request is retryable.
+	//
+	// Implementations may consider request attempt count when determining if a
+	// request is retryable, but the SDK will use MaxRetries to limit the
+	// number of attempts a request are made.
+	ShouldRetry(*Request) bool
+
+	// MaxRetries is the number of times a request may be retried before
+	// failing.
+	MaxRetries() int
+}
+
+// WithRetryer sets a Retryer value to the given Config returning the Config
+// value for chaining.
+func WithRetryer(cfg *aws.Config, retryer Retryer) *aws.Config {
+	cfg.Retryer = retryer
+	return cfg
+}
+
+// retryableCodes is a collection of service response codes which are retry-able
+// without any further action.
+var retryableCodes = map[string]struct{}{
+	"RequestError":            {},
+	"RequestTimeout":          {},
+	ErrCodeResponseTimeout:    {},
+	"RequestTimeoutException": {}, // Glacier's flavor of RequestTimeout
+}
+
+var throttleCodes = map[string]struct{}{
+	"ProvisionedThroughputExceededException": {},
+	"Throttling":                             {},
+	"ThrottlingException":                    {},
+	"RequestLimitExceeded":                   {},
+	"RequestThrottled":                       {},
+	"RequestThrottledException":              {},
+	"TooManyRequestsException":               {}, // Lambda functions
+	"PriorRequestNotComplete":                {}, // Route53
+	"TransactionInProgressException":         {},
+}
+
+// credsExpiredCodes is a collection of error codes which signify the credentials
+// need to be refreshed. Expired tokens require refreshing of credentials, and
+// resigning before the request can be retried.
+var credsExpiredCodes = map[string]struct{}{
+	"ExpiredToken":          {},
+	"ExpiredTokenException": {},
+	"RequestExpired":        {}, // EC2 Only
+}
+
+func isCodeThrottle(code string) bool {
+	_, ok := throttleCodes[code]
+	return ok
+}
+
+func isCodeRetryable(code string) bool {
+	if _, ok := retryableCodes[code]; ok {
+		return true
+	}
+
+	return isCodeExpiredCreds(code)
+}
+
+func isCodeExpiredCreds(code string) bool {
+	_, ok := credsExpiredCodes[code]
+	return ok
+}
+
+var validParentCodes = map[string]struct{}{
+	ErrCodeSerialization: {},
+	ErrCodeRead:          {},
+}
+
+type temporaryError interface {
+	Temporary() bool
+}
+
+func isNestedErrorRetryable(parentErr awserr.Error) bool {
+	if parentErr == nil {
+		return false
+	}
+
+	if _, ok := validParentCodes[parentErr.Code()]; !ok {
+		return false
+	}
+
+	err := parentErr.OrigErr()
+	if err == nil {
+		return false
+	}
+
+	if aerr, ok := err.(awserr.Error); ok {
+		return isCodeRetryable(aerr.Code())
+	}
+
+	if t, ok := err.(temporaryError); ok {
+		return t.Temporary() || isErrConnectionReset(err)
+	}
+
+	return isErrConnectionReset(err)
+}
+
+// IsErrorRetryable returns whether the error is retryable, based on its Code.
+// Returns false if error is nil.
+func IsErrorRetryable(err error) bool {
+	if err == nil {
+		return false
+	}
+	return shouldRetryError(err)
+}
+
+type temporary interface {
+	Temporary() bool
+}
+
+func shouldRetryError(origErr error) bool {
+	switch err := origErr.(type) {
+	case awserr.Error:
+		if err.Code() == CanceledErrorCode {
+			return false
+		}
+		if isNestedErrorRetryable(err) {
+			return true
+		}
+
+		origErr := err.OrigErr()
+		var shouldRetry bool
+		if origErr != nil {
+			shouldRetry := shouldRetryError(origErr)
+			if err.Code() == "RequestError" && !shouldRetry {
+				return false
+			}
+		}
+		if isCodeRetryable(err.Code()) {
+			return true
+		}
+		return shouldRetry
+
+	case *url.Error:
+		if strings.Contains(err.Error(), "connection refused") {
+			// Refused connections should be retried as the service may not yet
+			// be running on the port. Go TCP dial considers refused
+			// connections as not temporary.
+			return true
+		}
+		// *url.Error only implements Temporary after golang 1.6 but since
+		// url.Error only wraps the error:
+		return shouldRetryError(err.Err)
+
+	case temporary:
+		if netErr, ok := err.(*net.OpError); ok && netErr.Op == "dial" {
+			return true
+		}
+		// If the error is temporary, we want to allow continuation of the
+		// retry process
+		return err.Temporary() || isErrConnectionReset(origErr)
+
+	case nil:
+		// `awserr.Error.OrigErr()` can be nil, meaning there was an error but
+		// because we don't know the cause, it is marked as retryable. See
+		// TestRequest4xxUnretryable for an example.
+		return true
+
+	default:
+		switch err.Error() {
+		case "net/http: request canceled",
+			"net/http: request canceled while waiting for connection":
+			// known 1.5 error case when an http request is cancelled
+			return false
+		}
+		// here we don't know the error; so we allow a retry.
+		return true
+	}
+}
+
+// IsErrorThrottle returns whether the error is to be throttled based on its code.
+// Returns false if error is nil.
+func IsErrorThrottle(err error) bool {
+	if aerr, ok := err.(awserr.Error); ok && aerr != nil {
+		return isCodeThrottle(aerr.Code())
+	}
+	return false
+}
+
+// IsErrorExpiredCreds returns whether the error code is a credential expiry
+// error. Returns false if error is nil.
+func IsErrorExpiredCreds(err error) bool {
+	if aerr, ok := err.(awserr.Error); ok && aerr != nil {
+		return isCodeExpiredCreds(aerr.Code())
+	}
+	return false
+}
+
+// IsErrorRetryable returns whether the error is retryable, based on its Code.
+// Returns false if the request has no Error set.
+//
+// Alias for the utility function IsErrorRetryable
+func (r *Request) IsErrorRetryable() bool {
+	if isErrCode(r.Error, r.RetryErrorCodes) {
+		return true
+	}
+
+	return IsErrorRetryable(r.Error)
+}
+
+// IsErrorThrottle returns whether the error is to be throttled based on its
+// code. Returns false if the request has no Error set.
+//
+// Alias for the utility function IsErrorThrottle
+func (r *Request) IsErrorThrottle() bool {
+	if isErrCode(r.Error, r.ThrottleErrorCodes) {
+		return true
+	}
+
+	if r.HTTPResponse != nil {
+		switch r.HTTPResponse.StatusCode {
+		case 429, 502, 503, 504:
+			return true
+		}
+	}
+
+	return IsErrorThrottle(r.Error)
+}
+
+func isErrCode(err error, codes []string) bool {
+	if aerr, ok := err.(awserr.Error); ok && aerr != nil {
+		for _, code := range codes {
+			if code == aerr.Code() {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+// IsErrorExpired returns whether the error code is a credential expiry error.
+// Returns false if the request has no Error set.
+//
+// Alias for the utility function IsErrorExpiredCreds
+func (r *Request) IsErrorExpired() bool {
+	return IsErrorExpiredCreds(r.Error)
+}

vendor/github.com/aws/aws-sdk-go/aws/request/timeout_read_closer.go

@@ -0,0 +1,94 @@
+package request
+
+import (
+	"io"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+var timeoutErr = awserr.New(
+	ErrCodeResponseTimeout,
+	"read on body has reached the timeout limit",
+	nil,
+)
+
+type readResult struct {
+	n   int
+	err error
+}
+
+// timeoutReadCloser will handle body reads that take too long.
+// We will return a ErrReadTimeout error if a timeout occurs.
+type timeoutReadCloser struct {
+	reader   io.ReadCloser
+	duration time.Duration
+}
+
+// Read will spin off a goroutine to call the reader's Read method. We will
+// select on the timer's channel or the read's channel. Whoever completes first
+// will be returned.
+func (r *timeoutReadCloser) Read(b []byte) (int, error) {
+	timer := time.NewTimer(r.duration)
+	c := make(chan readResult, 1)
+
+	go func() {
+		n, err := r.reader.Read(b)
+		timer.Stop()
+		c <- readResult{n: n, err: err}
+	}()
+
+	select {
+	case data := <-c:
+		return data.n, data.err
+	case <-timer.C:
+		return 0, timeoutErr
+	}
+}
+
+func (r *timeoutReadCloser) Close() error {
+	return r.reader.Close()
+}
+
+const (
+	// HandlerResponseTimeout is what we use to signify the name of the
+	// response timeout handler.
+	HandlerResponseTimeout = "ResponseTimeoutHandler"
+)
+
+// adaptToResponseTimeoutError is a handler that will replace any top level error
+// to a ErrCodeResponseTimeout, if its child is that.
+func adaptToResponseTimeoutError(req *Request) {
+	if err, ok := req.Error.(awserr.Error); ok {
+		aerr, ok := err.OrigErr().(awserr.Error)
+		if ok && aerr.Code() == ErrCodeResponseTimeout {
+			req.Error = aerr
+		}
+	}
+}
+
+// WithResponseReadTimeout is a request option that will wrap the body in a timeout read closer.
+// This will allow for per read timeouts. If a timeout occurred, we will return the
+// ErrCodeResponseTimeout.
+//
+//     svc.PutObjectWithContext(ctx, params, request.WithTimeoutReadCloser(30 * time.Second)
+func WithResponseReadTimeout(duration time.Duration) Option {
+	return func(r *Request) {
+
+		var timeoutHandler = NamedHandler{
+			HandlerResponseTimeout,
+			func(req *Request) {
+				req.HTTPResponse.Body = &timeoutReadCloser{
+					reader:   req.HTTPResponse.Body,
+					duration: duration,
+				}
+			}}
+
+		// remove the handler so we are not stomping over any new durations.
+		r.Handlers.Send.RemoveByName(HandlerResponseTimeout)
+		r.Handlers.Send.PushBackNamed(timeoutHandler)
+
+		r.Handlers.Unmarshal.PushBack(adaptToResponseTimeoutError)
+		r.Handlers.UnmarshalError.PushBack(adaptToResponseTimeoutError)
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/request/validation.go

@@ -0,0 +1,286 @@
+package request
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+)
+
+const (
+	// InvalidParameterErrCode is the error code for invalid parameters errors
+	InvalidParameterErrCode = "InvalidParameter"
+	// ParamRequiredErrCode is the error code for required parameter errors
+	ParamRequiredErrCode = "ParamRequiredError"
+	// ParamMinValueErrCode is the error code for fields with too low of a
+	// number value.
+	ParamMinValueErrCode = "ParamMinValueError"
+	// ParamMinLenErrCode is the error code for fields without enough elements.
+	ParamMinLenErrCode = "ParamMinLenError"
+	// ParamMaxLenErrCode is the error code for value being too long.
+	ParamMaxLenErrCode = "ParamMaxLenError"
+
+	// ParamFormatErrCode is the error code for a field with invalid
+	// format or characters.
+	ParamFormatErrCode = "ParamFormatInvalidError"
+)
+
+// Validator provides a way for types to perform validation logic on their
+// input values that external code can use to determine if a type's values
+// are valid.
+type Validator interface {
+	Validate() error
+}
+
+// An ErrInvalidParams provides wrapping of invalid parameter errors found when
+// validating API operation input parameters.
+type ErrInvalidParams struct {
+	// Context is the base context of the invalid parameter group.
+	Context string
+	errs    []ErrInvalidParam
+}
+
+// Add adds a new invalid parameter error to the collection of invalid
+// parameters. The context of the invalid parameter will be updated to reflect
+// this collection.
+func (e *ErrInvalidParams) Add(err ErrInvalidParam) {
+	err.SetContext(e.Context)
+	e.errs = append(e.errs, err)
+}
+
+// AddNested adds the invalid parameter errors from another ErrInvalidParams
+// value into this collection. The nested errors will have their nested context
+// updated and base context to reflect the merging.
+//
+// Use for nested validations errors.
+func (e *ErrInvalidParams) AddNested(nestedCtx string, nested ErrInvalidParams) {
+	for _, err := range nested.errs {
+		err.SetContext(e.Context)
+		err.AddNestedContext(nestedCtx)
+		e.errs = append(e.errs, err)
+	}
+}
+
+// Len returns the number of invalid parameter errors
+func (e ErrInvalidParams) Len() int {
+	return len(e.errs)
+}
+
+// Code returns the code of the error
+func (e ErrInvalidParams) Code() string {
+	return InvalidParameterErrCode
+}
+
+// Message returns the message of the error
+func (e ErrInvalidParams) Message() string {
+	return fmt.Sprintf("%d validation error(s) found.", len(e.errs))
+}
+
+// Error returns the string formatted form of the invalid parameters.
+func (e ErrInvalidParams) Error() string {
+	w := &bytes.Buffer{}
+	fmt.Fprintf(w, "%s: %s\n", e.Code(), e.Message())
+
+	for _, err := range e.errs {
+		fmt.Fprintf(w, "- %s\n", err.Message())
+	}
+
+	return w.String()
+}
+
+// OrigErr returns the invalid parameters as a awserr.BatchedErrors value
+func (e ErrInvalidParams) OrigErr() error {
+	return awserr.NewBatchError(
+		InvalidParameterErrCode, e.Message(), e.OrigErrs())
+}
+
+// OrigErrs returns a slice of the invalid parameters
+func (e ErrInvalidParams) OrigErrs() []error {
+	errs := make([]error, len(e.errs))
+	for i := 0; i < len(errs); i++ {
+		errs[i] = e.errs[i]
+	}
+
+	return errs
+}
+
+// An ErrInvalidParam represents an invalid parameter error type.
+type ErrInvalidParam interface {
+	awserr.Error
+
+	// Field name the error occurred on.
+	Field() string
+
+	// SetContext updates the context of the error.
+	SetContext(string)
+
+	// AddNestedContext updates the error's context to include a nested level.
+	AddNestedContext(string)
+}
+
+type errInvalidParam struct {
+	context       string
+	nestedContext string
+	field         string
+	code          string
+	msg           string
+}
+
+// Code returns the error code for the type of invalid parameter.
+func (e *errInvalidParam) Code() string {
+	return e.code
+}
+
+// Message returns the reason the parameter was invalid, and its context.
+func (e *errInvalidParam) Message() string {
+	return fmt.Sprintf("%s, %s.", e.msg, e.Field())
+}
+
+// Error returns the string version of the invalid parameter error.
+func (e *errInvalidParam) Error() string {
+	return fmt.Sprintf("%s: %s", e.code, e.Message())
+}
+
+// OrigErr returns nil, Implemented for awserr.Error interface.
+func (e *errInvalidParam) OrigErr() error {
+	return nil
+}
+
+// Field Returns the field and context the error occurred.
+func (e *errInvalidParam) Field() string {
+	field := e.context
+	if len(field) > 0 {
+		field += "."
+	}
+	if len(e.nestedContext) > 0 {
+		field += fmt.Sprintf("%s.", e.nestedContext)
+	}
+	field += e.field
+
+	return field
+}
+
+// SetContext updates the base context of the error.
+func (e *errInvalidParam) SetContext(ctx string) {
+	e.context = ctx
+}
+
+// AddNestedContext prepends a context to the field's path.
+func (e *errInvalidParam) AddNestedContext(ctx string) {
+	if len(e.nestedContext) == 0 {
+		e.nestedContext = ctx
+	} else {
+		e.nestedContext = fmt.Sprintf("%s.%s", ctx, e.nestedContext)
+	}
+
+}
+
+// An ErrParamRequired represents an required parameter error.
+type ErrParamRequired struct {
+	errInvalidParam
+}
+
+// NewErrParamRequired creates a new required parameter error.
+func NewErrParamRequired(field string) *ErrParamRequired {
+	return &ErrParamRequired{
+		errInvalidParam{
+			code:  ParamRequiredErrCode,
+			field: field,
+			msg:   fmt.Sprintf("missing required field"),
+		},
+	}
+}
+
+// An ErrParamMinValue represents a minimum value parameter error.
+type ErrParamMinValue struct {
+	errInvalidParam
+	min float64
+}
+
+// NewErrParamMinValue creates a new minimum value parameter error.
+func NewErrParamMinValue(field string, min float64) *ErrParamMinValue {
+	return &ErrParamMinValue{
+		errInvalidParam: errInvalidParam{
+			code:  ParamMinValueErrCode,
+			field: field,
+			msg:   fmt.Sprintf("minimum field value of %v", min),
+		},
+		min: min,
+	}
+}
+
+// MinValue returns the field's require minimum value.
+//
+// float64 is returned for both int and float min values.
+func (e *ErrParamMinValue) MinValue() float64 {
+	return e.min
+}
+
+// An ErrParamMinLen represents a minimum length parameter error.
+type ErrParamMinLen struct {
+	errInvalidParam
+	min int
+}
+
+// NewErrParamMinLen creates a new minimum length parameter error.
+func NewErrParamMinLen(field string, min int) *ErrParamMinLen {
+	return &ErrParamMinLen{
+		errInvalidParam: errInvalidParam{
+			code:  ParamMinLenErrCode,
+			field: field,
+			msg:   fmt.Sprintf("minimum field size of %v", min),
+		},
+		min: min,
+	}
+}
+
+// MinLen returns the field's required minimum length.
+func (e *ErrParamMinLen) MinLen() int {
+	return e.min
+}
+
+// An ErrParamMaxLen represents a maximum length parameter error.
+type ErrParamMaxLen struct {
+	errInvalidParam
+	max int
+}
+
+// NewErrParamMaxLen creates a new maximum length parameter error.
+func NewErrParamMaxLen(field string, max int, value string) *ErrParamMaxLen {
+	return &ErrParamMaxLen{
+		errInvalidParam: errInvalidParam{
+			code:  ParamMaxLenErrCode,
+			field: field,
+			msg:   fmt.Sprintf("maximum size of %v, %v", max, value),
+		},
+		max: max,
+	}
+}
+
+// MaxLen returns the field's required minimum length.
+func (e *ErrParamMaxLen) MaxLen() int {
+	return e.max
+}
+
+// An ErrParamFormat represents a invalid format parameter error.
+type ErrParamFormat struct {
+	errInvalidParam
+	format string
+}
+
+// NewErrParamFormat creates a new invalid format parameter error.
+func NewErrParamFormat(field string, format, value string) *ErrParamFormat {
+	return &ErrParamFormat{
+		errInvalidParam: errInvalidParam{
+			code:  ParamFormatErrCode,
+			field: field,
+			msg:   fmt.Sprintf("format %v, %v", format, value),
+		},
+		format: format,
+	}
+}
+
+// Format returns the field's required format.
+func (e *ErrParamFormat) Format() string {
+	return e.format
+}

vendor/github.com/aws/aws-sdk-go/aws/request/waiter.go

@@ -0,0 +1,295 @@
+package request
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/awsutil"
+)
+
+// WaiterResourceNotReadyErrorCode is the error code returned by a waiter when
+// the waiter's max attempts have been exhausted.
+const WaiterResourceNotReadyErrorCode = "ResourceNotReady"
+
+// A WaiterOption is a function that will update the Waiter value's fields to
+// configure the waiter.
+type WaiterOption func(*Waiter)
+
+// WithWaiterMaxAttempts returns the maximum number of times the waiter should
+// attempt to check the resource for the target state.
+func WithWaiterMaxAttempts(max int) WaiterOption {
+	return func(w *Waiter) {
+		w.MaxAttempts = max
+	}
+}
+
+// WaiterDelay will return a delay the waiter should pause between attempts to
+// check the resource state. The passed in attempt is the number of times the
+// Waiter has checked the resource state.
+//
+// Attempt is the number of attempts the Waiter has made checking the resource
+// state.
+type WaiterDelay func(attempt int) time.Duration
+
+// ConstantWaiterDelay returns a WaiterDelay that will always return a constant
+// delay the waiter should use between attempts. It ignores the number of
+// attempts made.
+func ConstantWaiterDelay(delay time.Duration) WaiterDelay {
+	return func(attempt int) time.Duration {
+		return delay
+	}
+}
+
+// WithWaiterDelay will set the Waiter to use the WaiterDelay passed in.
+func WithWaiterDelay(delayer WaiterDelay) WaiterOption {
+	return func(w *Waiter) {
+		w.Delay = delayer
+	}
+}
+
+// WithWaiterLogger returns a waiter option to set the logger a waiter
+// should use to log warnings and errors to.
+func WithWaiterLogger(logger aws.Logger) WaiterOption {
+	return func(w *Waiter) {
+		w.Logger = logger
+	}
+}
+
+// WithWaiterRequestOptions returns a waiter option setting the request
+// options for each request the waiter makes. Appends to waiter's request
+// options already set.
+func WithWaiterRequestOptions(opts ...Option) WaiterOption {
+	return func(w *Waiter) {
+		w.RequestOptions = append(w.RequestOptions, opts...)
+	}
+}
+
+// A Waiter provides the functionality to perform a blocking call which will
+// wait for a resource state to be satisfied by a service.
+//
+// This type should not be used directly. The API operations provided in the
+// service packages prefixed with "WaitUntil" should be used instead.
+type Waiter struct {
+	Name      string
+	Acceptors []WaiterAcceptor
+	Logger    aws.Logger
+
+	MaxAttempts int
+	Delay       WaiterDelay
+
+	RequestOptions   []Option
+	NewRequest       func([]Option) (*Request, error)
+	SleepWithContext func(aws.Context, time.Duration) error
+}
+
+// ApplyOptions updates the waiter with the list of waiter options provided.
+func (w *Waiter) ApplyOptions(opts ...WaiterOption) {
+	for _, fn := range opts {
+		fn(w)
+	}
+}
+
+// WaiterState are states the waiter uses based on WaiterAcceptor definitions
+// to identify if the resource state the waiter is waiting on has occurred.
+type WaiterState int
+
+// String returns the string representation of the waiter state.
+func (s WaiterState) String() string {
+	switch s {
+	case SuccessWaiterState:
+		return "success"
+	case FailureWaiterState:
+		return "failure"
+	case RetryWaiterState:
+		return "retry"
+	default:
+		return "unknown waiter state"
+	}
+}
+
+// States the waiter acceptors will use to identify target resource states.
+const (
+	SuccessWaiterState WaiterState = iota // waiter successful
+	FailureWaiterState                    // waiter failed
+	RetryWaiterState                      // waiter needs to be retried
+)
+
+// WaiterMatchMode is the mode that the waiter will use to match the WaiterAcceptor
+// definition's Expected attribute.
+type WaiterMatchMode int
+
+// Modes the waiter will use when inspecting API response to identify target
+// resource states.
+const (
+	PathAllWaiterMatch  WaiterMatchMode = iota // match on all paths
+	PathWaiterMatch                            // match on specific path
+	PathAnyWaiterMatch                         // match on any path
+	PathListWaiterMatch                        // match on list of paths
+	StatusWaiterMatch                          // match on status code
+	ErrorWaiterMatch                           // match on error
+)
+
+// String returns the string representation of the waiter match mode.
+func (m WaiterMatchMode) String() string {
+	switch m {
+	case PathAllWaiterMatch:
+		return "pathAll"
+	case PathWaiterMatch:
+		return "path"
+	case PathAnyWaiterMatch:
+		return "pathAny"
+	case PathListWaiterMatch:
+		return "pathList"
+	case StatusWaiterMatch:
+		return "status"
+	case ErrorWaiterMatch:
+		return "error"
+	default:
+		return "unknown waiter match mode"
+	}
+}
+
+// WaitWithContext will make requests for the API operation using NewRequest to
+// build API requests. The request's response will be compared against the
+// Waiter's Acceptors to determine the successful state of the resource the
+// waiter is inspecting.
+//
+// The passed in context must not be nil. If it is nil a panic will occur. The
+// Context will be used to cancel the waiter's pending requests and retry delays.
+// Use aws.BackgroundContext if no context is available.
+//
+// The waiter will continue until the target state defined by the Acceptors,
+// or the max attempts expires.
+//
+// Will return the WaiterResourceNotReadyErrorCode error code if the waiter's
+// retryer ShouldRetry returns false. This normally will happen when the max
+// wait attempts expires.
+func (w Waiter) WaitWithContext(ctx aws.Context) error {
+
+	for attempt := 1; ; attempt++ {
+		req, err := w.NewRequest(w.RequestOptions)
+		if err != nil {
+			waiterLogf(w.Logger, "unable to create request %v", err)
+			return err
+		}
+		req.Handlers.Build.PushBack(MakeAddToUserAgentFreeFormHandler("Waiter"))
+		err = req.Send()
+
+		// See if any of the acceptors match the request's response, or error
+		for _, a := range w.Acceptors {
+			if matched, matchErr := a.match(w.Name, w.Logger, req, err); matched {
+				return matchErr
+			}
+		}
+
+		// The Waiter should only check the resource state MaxAttempts times
+		// This is here instead of in the for loop above to prevent delaying
+		// unnecessary when the waiter will not retry.
+		if attempt == w.MaxAttempts {
+			break
+		}
+
+		// Delay to wait before inspecting the resource again
+		delay := w.Delay(attempt)
+		if sleepFn := req.Config.SleepDelay; sleepFn != nil {
+			// Support SleepDelay for backwards compatibility and testing
+			sleepFn(delay)
+		} else {
+			sleepCtxFn := w.SleepWithContext
+			if sleepCtxFn == nil {
+				sleepCtxFn = aws.SleepWithContext
+			}
+
+			if err := sleepCtxFn(ctx, delay); err != nil {
+				return awserr.New(CanceledErrorCode, "waiter context canceled", err)
+			}
+		}
+	}
+
+	return awserr.New(WaiterResourceNotReadyErrorCode, "exceeded wait attempts", nil)
+}
+
+// A WaiterAcceptor provides the information needed to wait for an API operation
+// to complete.
+type WaiterAcceptor struct {
+	State    WaiterState
+	Matcher  WaiterMatchMode
+	Argument string
+	Expected interface{}
+}
+
+// match returns if the acceptor found a match with the passed in request
+// or error. True is returned if the acceptor made a match, error is returned
+// if there was an error attempting to perform the match.
+func (a *WaiterAcceptor) match(name string, l aws.Logger, req *Request, err error) (bool, error) {
+	result := false
+	var vals []interface{}
+
+	switch a.Matcher {
+	case PathAllWaiterMatch, PathWaiterMatch:
+		// Require all matches to be equal for result to match
+		vals, _ = awsutil.ValuesAtPath(req.Data, a.Argument)
+		if len(vals) == 0 {
+			break
+		}
+		result = true
+		for _, val := range vals {
+			if !awsutil.DeepEqual(val, a.Expected) {
+				result = false
+				break
+			}
+		}
+	case PathAnyWaiterMatch:
+		// Only a single match needs to equal for the result to match
+		vals, _ = awsutil.ValuesAtPath(req.Data, a.Argument)
+		for _, val := range vals {
+			if awsutil.DeepEqual(val, a.Expected) {
+				result = true
+				break
+			}
+		}
+	case PathListWaiterMatch:
+		// ignored matcher
+	case StatusWaiterMatch:
+		s := a.Expected.(int)
+		result = s == req.HTTPResponse.StatusCode
+	case ErrorWaiterMatch:
+		if aerr, ok := err.(awserr.Error); ok {
+			result = aerr.Code() == a.Expected.(string)
+		}
+	default:
+		waiterLogf(l, "WARNING: Waiter %s encountered unexpected matcher: %s",
+			name, a.Matcher)
+	}
+
+	if !result {
+		// If there was no matching result found there is nothing more to do
+		// for this response, retry the request.
+		return false, nil
+	}
+
+	switch a.State {
+	case SuccessWaiterState:
+		// waiter completed
+		return true, nil
+	case FailureWaiterState:
+		// Waiter failure state triggered
+		return true, awserr.New(WaiterResourceNotReadyErrorCode,
+			"failed waiting for successful resource state", err)
+	case RetryWaiterState:
+		// clear the error and retry the operation
+		return false, nil
+	default:
+		waiterLogf(l, "WARNING: Waiter %s encountered unexpected state: %s",
+			name, a.State)
+		return false, nil
+	}
+}
+
+func waiterLogf(logger aws.Logger, msg string, args ...interface{}) {
+	if logger != nil {
+		logger.Log(fmt.Sprintf(msg, args...))
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/session/cabundle_transport.go

@@ -0,0 +1,26 @@
+// +build go1.7
+
+package session
+
+import (
+	"net"
+	"net/http"
+	"time"
+)
+
+// Transport that should be used when a custom CA bundle is specified with the
+// SDK.
+func getCABundleTransport() *http.Transport {
+	return &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+			DualStack: true,
+		}).DialContext,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/session/cabundle_transport_1_5.go

@@ -0,0 +1,22 @@
+// +build !go1.6,go1.5
+
+package session
+
+import (
+	"net"
+	"net/http"
+	"time"
+)
+
+// Transport that should be used when a custom CA bundle is specified with the
+// SDK.
+func getCABundleTransport() *http.Transport {
+	return &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		Dial: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).Dial,
+		TLSHandshakeTimeout: 10 * time.Second,
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/session/cabundle_transport_1_6.go

@@ -0,0 +1,23 @@
+// +build !go1.7,go1.6
+
+package session
+
+import (
+	"net"
+	"net/http"
+	"time"
+)
+
+// Transport that should be used when a custom CA bundle is specified with the
+// SDK.
+func getCABundleTransport() *http.Transport {
+	return &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		Dial: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).Dial,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/session/credentials.go

@@ -0,0 +1,259 @@
+package session
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/credentials/processcreds"
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+	"github.com/aws/aws-sdk-go/aws/defaults"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/shareddefaults"
+)
+
+func resolveCredentials(cfg *aws.Config,
+	envCfg envConfig, sharedCfg sharedConfig,
+	handlers request.Handlers,
+	sessOpts Options,
+) (*credentials.Credentials, error) {
+
+	switch {
+	case len(sessOpts.Profile) != 0:
+		// User explicitly provided an Profile in the session's configuration
+		// so load that profile from shared config first.
+		// Github(aws/aws-sdk-go#2727)
+		return resolveCredsFromProfile(cfg, envCfg, sharedCfg, handlers, sessOpts)
+
+	case envCfg.Creds.HasKeys():
+		// Environment credentials
+		return credentials.NewStaticCredentialsFromCreds(envCfg.Creds), nil
+
+	case len(envCfg.WebIdentityTokenFilePath) != 0:
+		// Web identity token from environment, RoleARN required to also be
+		// set.
+		return assumeWebIdentity(cfg, handlers,
+			envCfg.WebIdentityTokenFilePath,
+			envCfg.RoleARN,
+			envCfg.RoleSessionName,
+		)
+
+	default:
+		// Fallback to the "default" credential resolution chain.
+		return resolveCredsFromProfile(cfg, envCfg, sharedCfg, handlers, sessOpts)
+	}
+}
+
+// WebIdentityEmptyRoleARNErr will occur if 'AWS_WEB_IDENTITY_TOKEN_FILE' was set but
+// 'AWS_IAM_ROLE_ARN' was not set.
+var WebIdentityEmptyRoleARNErr = awserr.New(stscreds.ErrCodeWebIdentity, "role ARN is not set", nil)
+
+// WebIdentityEmptyTokenFilePathErr will occur if 'AWS_IAM_ROLE_ARN' was set but
+// 'AWS_WEB_IDENTITY_TOKEN_FILE' was not set.
+var WebIdentityEmptyTokenFilePathErr = awserr.New(stscreds.ErrCodeWebIdentity, "token file path is not set", nil)
+
+func assumeWebIdentity(cfg *aws.Config, handlers request.Handlers,
+	filepath string,
+	roleARN, sessionName string,
+) (*credentials.Credentials, error) {
+
+	if len(filepath) == 0 {
+		return nil, WebIdentityEmptyTokenFilePathErr
+	}
+
+	if len(roleARN) == 0 {
+		return nil, WebIdentityEmptyRoleARNErr
+	}
+
+	creds := stscreds.NewWebIdentityCredentials(
+		&Session{
+			Config:   cfg,
+			Handlers: handlers.Copy(),
+		},
+		roleARN,
+		sessionName,
+		filepath,
+	)
+
+	return creds, nil
+}
+
+func resolveCredsFromProfile(cfg *aws.Config,
+	envCfg envConfig, sharedCfg sharedConfig,
+	handlers request.Handlers,
+	sessOpts Options,
+) (creds *credentials.Credentials, err error) {
+
+	switch {
+	case sharedCfg.SourceProfile != nil:
+		// Assume IAM role with credentials source from a different profile.
+		creds, err = resolveCredsFromProfile(cfg, envCfg,
+			*sharedCfg.SourceProfile, handlers, sessOpts,
+		)
+
+	case sharedCfg.Creds.HasKeys():
+		// Static Credentials from Shared Config/Credentials file.
+		creds = credentials.NewStaticCredentialsFromCreds(
+			sharedCfg.Creds,
+		)
+
+	case len(sharedCfg.CredentialProcess) != 0:
+		// Get credentials from CredentialProcess
+		creds = processcreds.NewCredentials(sharedCfg.CredentialProcess)
+
+	case len(sharedCfg.CredentialSource) != 0:
+		creds, err = resolveCredsFromSource(cfg, envCfg,
+			sharedCfg, handlers, sessOpts,
+		)
+
+	case len(sharedCfg.WebIdentityTokenFile) != 0:
+		// Credentials from Assume Web Identity token require an IAM Role, and
+		// that roll will be assumed. May be wrapped with another assume role
+		// via SourceProfile.
+		return assumeWebIdentity(cfg, handlers,
+			sharedCfg.WebIdentityTokenFile,
+			sharedCfg.RoleARN,
+			sharedCfg.RoleSessionName,
+		)
+
+	default:
+		// Fallback to default credentials provider, include mock errors for
+		// the credential chain so user can identify why credentials failed to
+		// be retrieved.
+		creds = credentials.NewCredentials(&credentials.ChainProvider{
+			VerboseErrors: aws.BoolValue(cfg.CredentialsChainVerboseErrors),
+			Providers: []credentials.Provider{
+				&credProviderError{
+					Err: awserr.New("EnvAccessKeyNotFound",
+						"failed to find credentials in the environment.", nil),
+				},
+				&credProviderError{
+					Err: awserr.New("SharedCredsLoad",
+						fmt.Sprintf("failed to load profile, %s.", envCfg.Profile), nil),
+				},
+				defaults.RemoteCredProvider(*cfg, handlers),
+			},
+		})
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	if len(sharedCfg.RoleARN) > 0 {
+		cfgCp := *cfg
+		cfgCp.Credentials = creds
+		return credsFromAssumeRole(cfgCp, handlers, sharedCfg, sessOpts)
+	}
+
+	return creds, nil
+}
+
+// valid credential source values
+const (
+	credSourceEc2Metadata  = "Ec2InstanceMetadata"
+	credSourceEnvironment  = "Environment"
+	credSourceECSContainer = "EcsContainer"
+)
+
+func resolveCredsFromSource(cfg *aws.Config,
+	envCfg envConfig, sharedCfg sharedConfig,
+	handlers request.Handlers,
+	sessOpts Options,
+) (creds *credentials.Credentials, err error) {
+
+	switch sharedCfg.CredentialSource {
+	case credSourceEc2Metadata:
+		p := defaults.RemoteCredProvider(*cfg, handlers)
+		creds = credentials.NewCredentials(p)
+
+	case credSourceEnvironment:
+		creds = credentials.NewStaticCredentialsFromCreds(envCfg.Creds)
+
+	case credSourceECSContainer:
+		if len(os.Getenv(shareddefaults.ECSCredsProviderEnvVar)) == 0 {
+			return nil, ErrSharedConfigECSContainerEnvVarEmpty
+		}
+
+		p := defaults.RemoteCredProvider(*cfg, handlers)
+		creds = credentials.NewCredentials(p)
+
+	default:
+		return nil, ErrSharedConfigInvalidCredSource
+	}
+
+	return creds, nil
+}
+
+func credsFromAssumeRole(cfg aws.Config,
+	handlers request.Handlers,
+	sharedCfg sharedConfig,
+	sessOpts Options,
+) (*credentials.Credentials, error) {
+
+	if len(sharedCfg.MFASerial) != 0 && sessOpts.AssumeRoleTokenProvider == nil {
+		// AssumeRole Token provider is required if doing Assume Role
+		// with MFA.
+		return nil, AssumeRoleTokenProviderNotSetError{}
+	}
+
+	return stscreds.NewCredentials(
+		&Session{
+			Config:   &cfg,
+			Handlers: handlers.Copy(),
+		},
+		sharedCfg.RoleARN,
+		func(opt *stscreds.AssumeRoleProvider) {
+			opt.RoleSessionName = sharedCfg.RoleSessionName
+			opt.Duration = sessOpts.AssumeRoleDuration
+
+			// Assume role with external ID
+			if len(sharedCfg.ExternalID) > 0 {
+				opt.ExternalID = aws.String(sharedCfg.ExternalID)
+			}
+
+			// Assume role with MFA
+			if len(sharedCfg.MFASerial) > 0 {
+				opt.SerialNumber = aws.String(sharedCfg.MFASerial)
+				opt.TokenProvider = sessOpts.AssumeRoleTokenProvider
+			}
+		},
+	), nil
+}
+
+// AssumeRoleTokenProviderNotSetError is an error returned when creating a
+// session when the MFAToken option is not set when shared config is configured
+// load assume a role with an MFA token.
+type AssumeRoleTokenProviderNotSetError struct{}
+
+// Code is the short id of the error.
+func (e AssumeRoleTokenProviderNotSetError) Code() string {
+	return "AssumeRoleTokenProviderNotSetError"
+}
+
+// Message is the description of the error
+func (e AssumeRoleTokenProviderNotSetError) Message() string {
+	return fmt.Sprintf("assume role with MFA enabled, but AssumeRoleTokenProvider session option not set.")
+}
+
+// OrigErr is the underlying error that caused the failure.
+func (e AssumeRoleTokenProviderNotSetError) OrigErr() error {
+	return nil
+}
+
+// Error satisfies the error interface.
+func (e AssumeRoleTokenProviderNotSetError) Error() string {
+	return awserr.SprintError(e.Code(), e.Message(), "", nil)
+}
+
+type credProviderError struct {
+	Err error
+}
+
+func (c credProviderError) Retrieve() (credentials.Value, error) {
+	return credentials.Value{}, c.Err
+}
+func (c credProviderError) IsExpired() bool {
+	return true
+}

vendor/github.com/aws/aws-sdk-go/aws/session/doc.go

@@ -0,0 +1,245 @@
+/*
+Package session provides configuration for the SDK's service clients. Sessions
+can be shared across service clients that share the same base configuration.
+
+Sessions are safe to use concurrently as long as the Session is not being
+modified. Sessions should be cached when possible, because creating a new
+Session will load all configuration values from the environment, and config
+files each time the Session is created. Sharing the Session value across all of
+your service clients will ensure the configuration is loaded the fewest number
+of times possible.
+
+Sessions options from Shared Config
+
+By default NewSession will only load credentials from the shared credentials
+file (~/.aws/credentials). If the AWS_SDK_LOAD_CONFIG environment variable is
+set to a truthy value the Session will be created from the configuration
+values from the shared config (~/.aws/config) and shared credentials
+(~/.aws/credentials) files. Using the NewSessionWithOptions with
+SharedConfigState set to SharedConfigEnable will create the session as if the
+AWS_SDK_LOAD_CONFIG environment variable was set.
+
+Credential and config loading order
+
+The Session will attempt to load configuration and credentials from the
+environment, configuration files, and other credential sources. The order
+configuration is loaded in is:
+
+  * Environment Variables
+  * Shared Credentials file
+  * Shared Configuration file (if SharedConfig is enabled)
+  * EC2 Instance Metadata (credentials only)
+
+The Environment variables for credentials will have precedence over shared
+config even if SharedConfig is enabled. To override this behavior, and use
+shared config credentials instead specify the session.Options.Profile, (e.g.
+when using credential_source=Environment to assume a role).
+
+  sess, err := session.NewSessionWithOptions(session.Options{
+	  Profile: "myProfile",
+  })
+
+Creating Sessions
+
+Creating a Session without additional options will load credentials region, and
+profile loaded from the environment and shared config automatically. See,
+"Environment Variables" section for information on environment variables used
+by Session.
+
+	// Create Session
+	sess, err := session.NewSession()
+
+
+When creating Sessions optional aws.Config values can be passed in that will
+override the default, or loaded, config values the Session is being created
+with. This allows you to provide additional, or case based, configuration
+as needed.
+
+	// Create a Session with a custom region
+	sess, err := session.NewSession(&aws.Config{
+		Region: aws.String("us-west-2"),
+	})
+
+Use NewSessionWithOptions to provide additional configuration driving how the
+Session's configuration will be loaded. Such as, specifying shared config
+profile, or override the shared config state,  (AWS_SDK_LOAD_CONFIG).
+
+	// Equivalent to session.NewSession()
+	sess, err := session.NewSessionWithOptions(session.Options{
+		// Options
+	})
+
+	sess, err := session.NewSessionWithOptions(session.Options{
+		// Specify profile to load for the session's config
+		Profile: "profile_name",
+
+		// Provide SDK Config options, such as Region.
+		Config: aws.Config{
+			Region: aws.String("us-west-2"),
+		},
+
+		// Force enable Shared Config support
+		SharedConfigState: session.SharedConfigEnable,
+	})
+
+Adding Handlers
+
+You can add handlers to a session to decorate API operation, (e.g. adding HTTP
+headers). All clients that use the Session receive a copy of the Session's
+handlers. For example, the following request handler added to the Session logs
+every requests made.
+
+	// Create a session, and add additional handlers for all service
+	// clients created with the Session to inherit. Adds logging handler.
+	sess := session.Must(session.NewSession())
+
+	sess.Handlers.Send.PushFront(func(r *request.Request) {
+		// Log every request made and its payload
+		logger.Printf("Request: %s/%s, Params: %s",
+			r.ClientInfo.ServiceName, r.Operation, r.Params)
+	})
+
+Shared Config Fields
+
+By default the SDK will only load the shared credentials file's
+(~/.aws/credentials) credentials values, and all other config is provided by
+the environment variables, SDK defaults, and user provided aws.Config values.
+
+If the AWS_SDK_LOAD_CONFIG environment variable is set, or SharedConfigEnable
+option is used to create the Session the full shared config values will be
+loaded. This includes credentials, region, and support for assume role. In
+addition the Session will load its configuration from both the shared config
+file (~/.aws/config) and shared credentials file (~/.aws/credentials). Both
+files have the same format.
+
+If both config files are present the configuration from both files will be
+read. The Session will be created from configuration values from the shared
+credentials file (~/.aws/credentials) over those in the shared config file
+(~/.aws/config).
+
+Credentials are the values the SDK uses to authenticating requests with AWS
+Services. When specified in a file, both aws_access_key_id and
+aws_secret_access_key must be provided together in the same file to be
+considered valid. They will be ignored if both are not present.
+aws_session_token is an optional field that can be provided in addition to the
+other two fields.
+
+	aws_access_key_id = AKID
+	aws_secret_access_key = SECRET
+	aws_session_token = TOKEN
+
+	; region only supported if SharedConfigEnabled.
+	region = us-east-1
+
+Assume Role configuration
+
+The role_arn field allows you to configure the SDK to assume an IAM role using
+a set of credentials from another source. Such as when paired with static
+credentials, "profile_source", "credential_process", or "credential_source"
+fields. If "role_arn" is provided, a source of credentials must also be
+specified, such as "source_profile", "credential_source", or
+"credential_process".
+
+	role_arn = arn:aws:iam::<account_number>:role/<role_name>
+	source_profile = profile_with_creds
+	external_id = 1234
+	mfa_serial = <serial or mfa arn>
+	role_session_name = session_name
+
+
+The SDK supports assuming a role with MFA token. If "mfa_serial" is set, you
+must also set the Session Option.AssumeRoleTokenProvider. The Session will fail
+to load if the AssumeRoleTokenProvider is not specified.
+
+    sess := session.Must(session.NewSessionWithOptions(session.Options{
+        AssumeRoleTokenProvider: stscreds.StdinTokenProvider,
+    }))
+
+To setup Assume Role outside of a session see the stscreds.AssumeRoleProvider
+documentation.
+
+Environment Variables
+
+When a Session is created several environment variables can be set to adjust
+how the SDK functions, and what configuration data it loads when creating
+Sessions. All environment values are optional, but some values like credentials
+require multiple of the values to set or the partial values will be ignored.
+All environment variable values are strings unless otherwise noted.
+
+Environment configuration values. If set both Access Key ID and Secret Access
+Key must be provided. Session Token and optionally also be provided, but is
+not required.
+
+	# Access Key ID
+	AWS_ACCESS_KEY_ID=AKID
+	AWS_ACCESS_KEY=AKID # only read if AWS_ACCESS_KEY_ID is not set.
+
+	# Secret Access Key
+	AWS_SECRET_ACCESS_KEY=SECRET
+	AWS_SECRET_KEY=SECRET=SECRET # only read if AWS_SECRET_ACCESS_KEY is not set.
+
+	# Session Token
+	AWS_SESSION_TOKEN=TOKEN
+
+Region value will instruct the SDK where to make service API requests to. If is
+not provided in the environment the region must be provided before a service
+client request is made.
+
+	AWS_REGION=us-east-1
+
+	# AWS_DEFAULT_REGION is only read if AWS_SDK_LOAD_CONFIG is also set,
+	# and AWS_REGION is not also set.
+	AWS_DEFAULT_REGION=us-east-1
+
+Profile name the SDK should load use when loading shared config from the
+configuration files. If not provided "default" will be used as the profile name.
+
+	AWS_PROFILE=my_profile
+
+	# AWS_DEFAULT_PROFILE is only read if AWS_SDK_LOAD_CONFIG is also set,
+	# and AWS_PROFILE is not also set.
+	AWS_DEFAULT_PROFILE=my_profile
+
+SDK load config instructs the SDK to load the shared config in addition to
+shared credentials. This also expands the configuration loaded so the shared
+credentials will have parity with the shared config file. This also enables
+Region and Profile support for the AWS_DEFAULT_REGION and AWS_DEFAULT_PROFILE
+env values as well.
+
+	AWS_SDK_LOAD_CONFIG=1
+
+Shared credentials file path can be set to instruct the SDK to use an alternative
+file for the shared credentials. If not set the file will be loaded from
+$HOME/.aws/credentials on Linux/Unix based systems, and
+%USERPROFILE%\.aws\credentials on Windows.
+
+	AWS_SHARED_CREDENTIALS_FILE=$HOME/my_shared_credentials
+
+Shared config file path can be set to instruct the SDK to use an alternative
+file for the shared config. If not set the file will be loaded from
+$HOME/.aws/config on Linux/Unix based systems, and
+%USERPROFILE%\.aws\config on Windows.
+
+	AWS_CONFIG_FILE=$HOME/my_shared_config
+
+Path to a custom Credentials Authority (CA) bundle PEM file that the SDK
+will use instead of the default system's root CA bundle. Use this only
+if you want to replace the CA bundle the SDK uses for TLS requests.
+
+	AWS_CA_BUNDLE=$HOME/my_custom_ca_bundle
+
+Enabling this option will attempt to merge the Transport into the SDK's HTTP
+client. If the client's Transport is not a http.Transport an error will be
+returned. If the Transport's TLS config is set this option will cause the SDK
+to overwrite the Transport's TLS config's  RootCAs value. If the CA bundle file
+contains multiple certificates all of them will be loaded.
+
+The Session option CustomCABundle is also available when creating sessions
+to also enable this feature. CustomCABundle session option field has priority
+over the AWS_CA_BUNDLE environment variable, and will be used if both are set.
+
+Setting a custom HTTPClient in the aws.Config options will override this setting.
+To use this option and custom HTTP client, the HTTP client needs to be provided
+when creating the session. Not the service client.
+*/
+package session

vendor/github.com/aws/aws-sdk-go/aws/session/env_config.go

@@ -0,0 +1,277 @@
+package session
+
+import (
+	"os"
+	"strconv"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/defaults"
+)
+
+// EnvProviderName provides a name of the provider when config is loaded from environment.
+const EnvProviderName = "EnvConfigCredentials"
+
+// envConfig is a collection of environment values the SDK will read
+// setup config from. All environment values are optional. But some values
+// such as credentials require multiple values to be complete or the values
+// will be ignored.
+type envConfig struct {
+	// Environment configuration values. If set both Access Key ID and Secret Access
+	// Key must be provided. Session Token and optionally also be provided, but is
+	// not required.
+	//
+	//	# Access Key ID
+	//	AWS_ACCESS_KEY_ID=AKID
+	//	AWS_ACCESS_KEY=AKID # only read if AWS_ACCESS_KEY_ID is not set.
+	//
+	//	# Secret Access Key
+	//	AWS_SECRET_ACCESS_KEY=SECRET
+	//	AWS_SECRET_KEY=SECRET=SECRET # only read if AWS_SECRET_ACCESS_KEY is not set.
+	//
+	//	# Session Token
+	//	AWS_SESSION_TOKEN=TOKEN
+	Creds credentials.Value
+
+	// Region value will instruct the SDK where to make service API requests to. If is
+	// not provided in the environment the region must be provided before a service
+	// client request is made.
+	//
+	//	AWS_REGION=us-east-1
+	//
+	//	# AWS_DEFAULT_REGION is only read if AWS_SDK_LOAD_CONFIG is also set,
+	//	# and AWS_REGION is not also set.
+	//	AWS_DEFAULT_REGION=us-east-1
+	Region string
+
+	// Profile name the SDK should load use when loading shared configuration from the
+	// shared configuration files. If not provided "default" will be used as the
+	// profile name.
+	//
+	//	AWS_PROFILE=my_profile
+	//
+	//	# AWS_DEFAULT_PROFILE is only read if AWS_SDK_LOAD_CONFIG is also set,
+	//	# and AWS_PROFILE is not also set.
+	//	AWS_DEFAULT_PROFILE=my_profile
+	Profile string
+
+	// SDK load config instructs the SDK to load the shared config in addition to
+	// shared credentials. This also expands the configuration loaded from the shared
+	// credentials to have parity with the shared config file. This also enables
+	// Region and Profile support for the AWS_DEFAULT_REGION and AWS_DEFAULT_PROFILE
+	// env values as well.
+	//
+	//	AWS_SDK_LOAD_CONFIG=1
+	EnableSharedConfig bool
+
+	// Shared credentials file path can be set to instruct the SDK to use an alternate
+	// file for the shared credentials. If not set the file will be loaded from
+	// $HOME/.aws/credentials on Linux/Unix based systems, and
+	// %USERPROFILE%\.aws\credentials on Windows.
+	//
+	//	AWS_SHARED_CREDENTIALS_FILE=$HOME/my_shared_credentials
+	SharedCredentialsFile string
+
+	// Shared config file path can be set to instruct the SDK to use an alternate
+	// file for the shared config. If not set the file will be loaded from
+	// $HOME/.aws/config on Linux/Unix based systems, and
+	// %USERPROFILE%\.aws\config on Windows.
+	//
+	//	AWS_CONFIG_FILE=$HOME/my_shared_config
+	SharedConfigFile string
+
+	// Sets the path to a custom Credentials Authority (CA) Bundle PEM file
+	// that the SDK will use instead of the system's root CA bundle.
+	// Only use this if you want to configure the SDK to use a custom set
+	// of CAs.
+	//
+	// Enabling this option will attempt to merge the Transport
+	// into the SDK's HTTP client. If the client's Transport is
+	// not a http.Transport an error will be returned. If the
+	// Transport's TLS config is set this option will cause the
+	// SDK to overwrite the Transport's TLS config's  RootCAs value.
+	//
+	// Setting a custom HTTPClient in the aws.Config options will override this setting.
+	// To use this option and custom HTTP client, the HTTP client needs to be provided
+	// when creating the session. Not the service client.
+	//
+	//  AWS_CA_BUNDLE=$HOME/my_custom_ca_bundle
+	CustomCABundle string
+
+	csmEnabled  string
+	CSMEnabled  *bool
+	CSMPort     string
+	CSMHost     string
+	CSMClientID string
+
+	// Enables endpoint discovery via environment variables.
+	//
+	//	AWS_ENABLE_ENDPOINT_DISCOVERY=true
+	EnableEndpointDiscovery *bool
+	enableEndpointDiscovery string
+
+	// Specifies the WebIdentity token the SDK should use to assume a role
+	// with.
+	//
+	//  AWS_WEB_IDENTITY_TOKEN_FILE=file_path
+	WebIdentityTokenFilePath string
+
+	// Specifies the IAM role arn to use when assuming an role.
+	//
+	//  AWS_ROLE_ARN=role_arn
+	RoleARN string
+
+	// Specifies the IAM role session name to use when assuming a role.
+	//
+	//  AWS_ROLE_SESSION_NAME=session_name
+	RoleSessionName string
+}
+
+var (
+	csmEnabledEnvKey = []string{
+		"AWS_CSM_ENABLED",
+	}
+	csmHostEnvKey = []string{
+		"AWS_CSM_HOST",
+	}
+	csmPortEnvKey = []string{
+		"AWS_CSM_PORT",
+	}
+	csmClientIDEnvKey = []string{
+		"AWS_CSM_CLIENT_ID",
+	}
+	credAccessEnvKey = []string{
+		"AWS_ACCESS_KEY_ID",
+		"AWS_ACCESS_KEY",
+	}
+	credSecretEnvKey = []string{
+		"AWS_SECRET_ACCESS_KEY",
+		"AWS_SECRET_KEY",
+	}
+	credSessionEnvKey = []string{
+		"AWS_SESSION_TOKEN",
+	}
+
+	enableEndpointDiscoveryEnvKey = []string{
+		"AWS_ENABLE_ENDPOINT_DISCOVERY",
+	}
+
+	regionEnvKeys = []string{
+		"AWS_REGION",
+		"AWS_DEFAULT_REGION", // Only read if AWS_SDK_LOAD_CONFIG is also set
+	}
+	profileEnvKeys = []string{
+		"AWS_PROFILE",
+		"AWS_DEFAULT_PROFILE", // Only read if AWS_SDK_LOAD_CONFIG is also set
+	}
+	sharedCredsFileEnvKey = []string{
+		"AWS_SHARED_CREDENTIALS_FILE",
+	}
+	sharedConfigFileEnvKey = []string{
+		"AWS_CONFIG_FILE",
+	}
+	webIdentityTokenFilePathEnvKey = []string{
+		"AWS_WEB_IDENTITY_TOKEN_FILE",
+	}
+	roleARNEnvKey = []string{
+		"AWS_ROLE_ARN",
+	}
+	roleSessionNameEnvKey = []string{
+		"AWS_ROLE_SESSION_NAME",
+	}
+)
+
+// loadEnvConfig retrieves the SDK's environment configuration.
+// See `envConfig` for the values that will be retrieved.
+//
+// If the environment variable `AWS_SDK_LOAD_CONFIG` is set to a truthy value
+// the shared SDK config will be loaded in addition to the SDK's specific
+// configuration values.
+func loadEnvConfig() envConfig {
+	enableSharedConfig, _ := strconv.ParseBool(os.Getenv("AWS_SDK_LOAD_CONFIG"))
+	return envConfigLoad(enableSharedConfig)
+}
+
+// loadEnvSharedConfig retrieves the SDK's environment configuration, and the
+// SDK shared config. See `envConfig` for the values that will be retrieved.
+//
+// Loads the shared configuration in addition to the SDK's specific configuration.
+// This will load the same values as `loadEnvConfig` if the `AWS_SDK_LOAD_CONFIG`
+// environment variable is set.
+func loadSharedEnvConfig() envConfig {
+	return envConfigLoad(true)
+}
+
+func envConfigLoad(enableSharedConfig bool) envConfig {
+	cfg := envConfig{}
+
+	cfg.EnableSharedConfig = enableSharedConfig
+
+	// Static environment credentials
+	var creds credentials.Value
+	setFromEnvVal(&creds.AccessKeyID, credAccessEnvKey)
+	setFromEnvVal(&creds.SecretAccessKey, credSecretEnvKey)
+	setFromEnvVal(&creds.SessionToken, credSessionEnvKey)
+	if creds.HasKeys() {
+		// Require logical grouping of credentials
+		creds.ProviderName = EnvProviderName
+		cfg.Creds = creds
+	}
+
+	// Role Metadata
+	setFromEnvVal(&cfg.RoleARN, roleARNEnvKey)
+	setFromEnvVal(&cfg.RoleSessionName, roleSessionNameEnvKey)
+
+	// Web identity environment variables
+	setFromEnvVal(&cfg.WebIdentityTokenFilePath, webIdentityTokenFilePathEnvKey)
+
+	// CSM environment variables
+	setFromEnvVal(&cfg.csmEnabled, csmEnabledEnvKey)
+	setFromEnvVal(&cfg.CSMHost, csmHostEnvKey)
+	setFromEnvVal(&cfg.CSMPort, csmPortEnvKey)
+	setFromEnvVal(&cfg.CSMClientID, csmClientIDEnvKey)
+
+	if len(cfg.csmEnabled) != 0 {
+		v, _ := strconv.ParseBool(cfg.csmEnabled)
+		cfg.CSMEnabled = &v
+	}
+
+	regionKeys := regionEnvKeys
+	profileKeys := profileEnvKeys
+	if !cfg.EnableSharedConfig {
+		regionKeys = regionKeys[:1]
+		profileKeys = profileKeys[:1]
+	}
+
+	setFromEnvVal(&cfg.Region, regionKeys)
+	setFromEnvVal(&cfg.Profile, profileKeys)
+
+	// endpoint discovery is in reference to it being enabled.
+	setFromEnvVal(&cfg.enableEndpointDiscovery, enableEndpointDiscoveryEnvKey)
+	if len(cfg.enableEndpointDiscovery) > 0 {
+		cfg.EnableEndpointDiscovery = aws.Bool(cfg.enableEndpointDiscovery != "false")
+	}
+
+	setFromEnvVal(&cfg.SharedCredentialsFile, sharedCredsFileEnvKey)
+	setFromEnvVal(&cfg.SharedConfigFile, sharedConfigFileEnvKey)
+
+	if len(cfg.SharedCredentialsFile) == 0 {
+		cfg.SharedCredentialsFile = defaults.SharedCredentialsFilename()
+	}
+	if len(cfg.SharedConfigFile) == 0 {
+		cfg.SharedConfigFile = defaults.SharedConfigFilename()
+	}
+
+	cfg.CustomCABundle = os.Getenv("AWS_CA_BUNDLE")
+
+	return cfg
+}
+
+func setFromEnvVal(dst *string, keys []string) {
+	for _, k := range keys {
+		if v := os.Getenv(k); len(v) > 0 {
+			*dst = v
+			break
+		}
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/session/session.go

@@ -0,0 +1,660 @@
+package session
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/corehandlers"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/csm"
+	"github.com/aws/aws-sdk-go/aws/defaults"
+	"github.com/aws/aws-sdk-go/aws/endpoints"
+	"github.com/aws/aws-sdk-go/aws/request"
+)
+
+const (
+	// ErrCodeSharedConfig represents an error that occurs in the shared
+	// configuration logic
+	ErrCodeSharedConfig = "SharedConfigErr"
+)
+
+// ErrSharedConfigSourceCollision will be returned if a section contains both
+// source_profile and credential_source
+var ErrSharedConfigSourceCollision = awserr.New(ErrCodeSharedConfig, "only source profile or credential source can be specified, not both", nil)
+
+// ErrSharedConfigECSContainerEnvVarEmpty will be returned if the environment
+// variables are empty and Environment was set as the credential source
+var ErrSharedConfigECSContainerEnvVarEmpty = awserr.New(ErrCodeSharedConfig, "EcsContainer was specified as the credential_source, but 'AWS_CONTAINER_CREDENTIALS_RELATIVE_URI' was not set", nil)
+
+// ErrSharedConfigInvalidCredSource will be returned if an invalid credential source was provided
+var ErrSharedConfigInvalidCredSource = awserr.New(ErrCodeSharedConfig, "credential source values must be EcsContainer, Ec2InstanceMetadata, or Environment", nil)
+
+// A Session provides a central location to create service clients from and
+// store configurations and request handlers for those services.
+//
+// Sessions are safe to create service clients concurrently, but it is not safe
+// to mutate the Session concurrently.
+//
+// The Session satisfies the service client's client.ConfigProvider.
+type Session struct {
+	Config   *aws.Config
+	Handlers request.Handlers
+}
+
+// New creates a new instance of the handlers merging in the provided configs
+// on top of the SDK's default configurations. Once the Session is created it
+// can be mutated to modify the Config or Handlers. The Session is safe to be
+// read concurrently, but it should not be written to concurrently.
+//
+// If the AWS_SDK_LOAD_CONFIG environment is set to a truthy value, the New
+// method could now encounter an error when loading the configuration. When
+// The environment variable is set, and an error occurs, New will return a
+// session that will fail all requests reporting the error that occurred while
+// loading the session. Use NewSession to get the error when creating the
+// session.
+//
+// If the AWS_SDK_LOAD_CONFIG environment variable is set to a truthy value
+// the shared config file (~/.aws/config) will also be loaded, in addition to
+// the shared credentials file (~/.aws/credentials). Values set in both the
+// shared config, and shared credentials will be taken from the shared
+// credentials file.
+//
+// Deprecated: Use NewSession functions to create sessions instead. NewSession
+// has the same functionality as New except an error can be returned when the
+// func is called instead of waiting to receive an error until a request is made.
+func New(cfgs ...*aws.Config) *Session {
+	// load initial config from environment
+	envCfg := loadEnvConfig()
+
+	if envCfg.EnableSharedConfig {
+		var cfg aws.Config
+		cfg.MergeIn(cfgs...)
+		s, err := NewSessionWithOptions(Options{
+			Config:            cfg,
+			SharedConfigState: SharedConfigEnable,
+		})
+		if err != nil {
+			// Old session.New expected all errors to be discovered when
+			// a request is made, and would report the errors then. This
+			// needs to be replicated if an error occurs while creating
+			// the session.
+			msg := "failed to create session with AWS_SDK_LOAD_CONFIG enabled. " +
+				"Use session.NewSession to handle errors occurring during session creation."
+
+			// Session creation failed, need to report the error and prevent
+			// any requests from succeeding.
+			s = &Session{Config: defaults.Config()}
+			s.Config.MergeIn(cfgs...)
+			s.Config.Logger.Log("ERROR:", msg, "Error:", err)
+			s.Handlers.Validate.PushBack(func(r *request.Request) {
+				r.Error = err
+			})
+		}
+
+		return s
+	}
+
+	s := deprecatedNewSession(cfgs...)
+
+	if csmCfg, err := loadCSMConfig(envCfg, []string{}); err != nil {
+		if l := s.Config.Logger; l != nil {
+			l.Log(fmt.Sprintf("ERROR: failed to load CSM configuration, %v", err))
+		}
+	} else if csmCfg.Enabled {
+		err := enableCSM(&s.Handlers, csmCfg, s.Config.Logger)
+		if err != nil {
+			err = fmt.Errorf("failed to enable CSM, %v", err)
+			s.Config.Logger.Log("ERROR:", err.Error())
+			s.Handlers.Validate.PushBack(func(r *request.Request) {
+				r.Error = err
+			})
+		}
+	}
+
+	return s
+}
+
+// NewSession returns a new Session created from SDK defaults, config files,
+// environment, and user provided config files. Once the Session is created
+// it can be mutated to modify the Config or Handlers. The Session is safe to
+// be read concurrently, but it should not be written to concurrently.
+//
+// If the AWS_SDK_LOAD_CONFIG environment variable is set to a truthy value
+// the shared config file (~/.aws/config) will also be loaded in addition to
+// the shared credentials file (~/.aws/credentials). Values set in both the
+// shared config, and shared credentials will be taken from the shared
+// credentials file. Enabling the Shared Config will also allow the Session
+// to be built with retrieving credentials with AssumeRole set in the config.
+//
+// See the NewSessionWithOptions func for information on how to override or
+// control through code how the Session will be created. Such as specifying the
+// config profile, and controlling if shared config is enabled or not.
+func NewSession(cfgs ...*aws.Config) (*Session, error) {
+	opts := Options{}
+	opts.Config.MergeIn(cfgs...)
+
+	return NewSessionWithOptions(opts)
+}
+
+// SharedConfigState provides the ability to optionally override the state
+// of the session's creation based on the shared config being enabled or
+// disabled.
+type SharedConfigState int
+
+const (
+	// SharedConfigStateFromEnv does not override any state of the
+	// AWS_SDK_LOAD_CONFIG env var. It is the default value of the
+	// SharedConfigState type.
+	SharedConfigStateFromEnv SharedConfigState = iota
+
+	// SharedConfigDisable overrides the AWS_SDK_LOAD_CONFIG env var value
+	// and disables the shared config functionality.
+	SharedConfigDisable
+
+	// SharedConfigEnable overrides the AWS_SDK_LOAD_CONFIG env var value
+	// and enables the shared config functionality.
+	SharedConfigEnable
+)
+
+// Options provides the means to control how a Session is created and what
+// configuration values will be loaded.
+//
+type Options struct {
+	// Provides config values for the SDK to use when creating service clients
+	// and making API requests to services. Any value set in with this field
+	// will override the associated value provided by the SDK defaults,
+	// environment or config files where relevant.
+	//
+	// If not set, configuration values from from SDK defaults, environment,
+	// config will be used.
+	Config aws.Config
+
+	// Overrides the config profile the Session should be created from. If not
+	// set the value of the environment variable will be loaded (AWS_PROFILE,
+	// or AWS_DEFAULT_PROFILE if the Shared Config is enabled).
+	//
+	// If not set and environment variables are not set the "default"
+	// (DefaultSharedConfigProfile) will be used as the profile to load the
+	// session config from.
+	Profile string
+
+	// Instructs how the Session will be created based on the AWS_SDK_LOAD_CONFIG
+	// environment variable. By default a Session will be created using the
+	// value provided by the AWS_SDK_LOAD_CONFIG environment variable.
+	//
+	// Setting this value to SharedConfigEnable or SharedConfigDisable
+	// will allow you to override the AWS_SDK_LOAD_CONFIG environment variable
+	// and enable or disable the shared config functionality.
+	SharedConfigState SharedConfigState
+
+	// Ordered list of files the session will load configuration from.
+	// It will override environment variable AWS_SHARED_CREDENTIALS_FILE, AWS_CONFIG_FILE.
+	SharedConfigFiles []string
+
+	// When the SDK's shared config is configured to assume a role with MFA
+	// this option is required in order to provide the mechanism that will
+	// retrieve the MFA token. There is no default value for this field. If
+	// it is not set an error will be returned when creating the session.
+	//
+	// This token provider will be called when ever the assumed role's
+	// credentials need to be refreshed. Within the context of service clients
+	// all sharing the same session the SDK will ensure calls to the token
+	// provider are atomic. When sharing a token provider across multiple
+	// sessions additional synchronization logic is needed to ensure the
+	// token providers do not introduce race conditions. It is recommend to
+	// share the session where possible.
+	//
+	// stscreds.StdinTokenProvider is a basic implementation that will prompt
+	// from stdin for the MFA token code.
+	//
+	// This field is only used if the shared configuration is enabled, and
+	// the config enables assume role wit MFA via the mfa_serial field.
+	AssumeRoleTokenProvider func() (string, error)
+
+	// When the SDK's shared config is configured to assume a role this option
+	// may be provided to set the expiry duration of the STS credentials.
+	// Defaults to 15 minutes if not set as documented in the
+	// stscreds.AssumeRoleProvider.
+	AssumeRoleDuration time.Duration
+
+	// Reader for a custom Credentials Authority (CA) bundle in PEM format that
+	// the SDK will use instead of the default system's root CA bundle. Use this
+	// only if you want to replace the CA bundle the SDK uses for TLS requests.
+	//
+	// Enabling this option will attempt to merge the Transport into the SDK's HTTP
+	// client. If the client's Transport is not a http.Transport an error will be
+	// returned. If the Transport's TLS config is set this option will cause the SDK
+	// to overwrite the Transport's TLS config's  RootCAs value. If the CA
+	// bundle reader contains multiple certificates all of them will be loaded.
+	//
+	// The Session option CustomCABundle is also available when creating sessions
+	// to also enable this feature. CustomCABundle session option field has priority
+	// over the AWS_CA_BUNDLE environment variable, and will be used if both are set.
+	CustomCABundle io.Reader
+
+	// The handlers that the session and all API clients will be created with.
+	// This must be a complete set of handlers. Use the defaults.Handlers()
+	// function to initialize this value before changing the handlers to be
+	// used by the SDK.
+	Handlers request.Handlers
+}
+
+// NewSessionWithOptions returns a new Session created from SDK defaults, config files,
+// environment, and user provided config files. This func uses the Options
+// values to configure how the Session is created.
+//
+// If the AWS_SDK_LOAD_CONFIG environment variable is set to a truthy value
+// the shared config file (~/.aws/config) will also be loaded in addition to
+// the shared credentials file (~/.aws/credentials). Values set in both the
+// shared config, and shared credentials will be taken from the shared
+// credentials file. Enabling the Shared Config will also allow the Session
+// to be built with retrieving credentials with AssumeRole set in the config.
+//
+//     // Equivalent to session.New
+//     sess := session.Must(session.NewSessionWithOptions(session.Options{}))
+//
+//     // Specify profile to load for the session's config
+//     sess := session.Must(session.NewSessionWithOptions(session.Options{
+//          Profile: "profile_name",
+//     }))
+//
+//     // Specify profile for config and region for requests
+//     sess := session.Must(session.NewSessionWithOptions(session.Options{
+//          Config: aws.Config{Region: aws.String("us-east-1")},
+//          Profile: "profile_name",
+//     }))
+//
+//     // Force enable Shared Config support
+//     sess := session.Must(session.NewSessionWithOptions(session.Options{
+//         SharedConfigState: session.SharedConfigEnable,
+//     }))
+func NewSessionWithOptions(opts Options) (*Session, error) {
+	var envCfg envConfig
+	if opts.SharedConfigState == SharedConfigEnable {
+		envCfg = loadSharedEnvConfig()
+	} else {
+		envCfg = loadEnvConfig()
+	}
+
+	if len(opts.Profile) != 0 {
+		envCfg.Profile = opts.Profile
+	}
+
+	switch opts.SharedConfigState {
+	case SharedConfigDisable:
+		envCfg.EnableSharedConfig = false
+	case SharedConfigEnable:
+		envCfg.EnableSharedConfig = true
+	}
+
+	// Only use AWS_CA_BUNDLE if session option is not provided.
+	if len(envCfg.CustomCABundle) != 0 && opts.CustomCABundle == nil {
+		f, err := os.Open(envCfg.CustomCABundle)
+		if err != nil {
+			return nil, awserr.New("LoadCustomCABundleError",
+				"failed to open custom CA bundle PEM file", err)
+		}
+		defer f.Close()
+		opts.CustomCABundle = f
+	}
+
+	return newSession(opts, envCfg, &opts.Config)
+}
+
+// Must is a helper function to ensure the Session is valid and there was no
+// error when calling a NewSession function.
+//
+// This helper is intended to be used in variable initialization to load the
+// Session and configuration at startup. Such as:
+//
+//     var sess = session.Must(session.NewSession())
+func Must(sess *Session, err error) *Session {
+	if err != nil {
+		panic(err)
+	}
+
+	return sess
+}
+
+func deprecatedNewSession(cfgs ...*aws.Config) *Session {
+	cfg := defaults.Config()
+	handlers := defaults.Handlers()
+
+	// Apply the passed in configs so the configuration can be applied to the
+	// default credential chain
+	cfg.MergeIn(cfgs...)
+	if cfg.EndpointResolver == nil {
+		// An endpoint resolver is required for a session to be able to provide
+		// endpoints for service client configurations.
+		cfg.EndpointResolver = endpoints.DefaultResolver()
+	}
+	cfg.Credentials = defaults.CredChain(cfg, handlers)
+
+	// Reapply any passed in configs to override credentials if set
+	cfg.MergeIn(cfgs...)
+
+	s := &Session{
+		Config:   cfg,
+		Handlers: handlers,
+	}
+
+	initHandlers(s)
+	return s
+}
+
+func enableCSM(handlers *request.Handlers, cfg csmConfig, logger aws.Logger) error {
+	if logger != nil {
+		logger.Log("Enabling CSM")
+	}
+
+	r, err := csm.Start(cfg.ClientID, csm.AddressWithDefaults(cfg.Host, cfg.Port))
+	if err != nil {
+		return err
+	}
+	r.InjectHandlers(handlers)
+
+	return nil
+}
+
+func newSession(opts Options, envCfg envConfig, cfgs ...*aws.Config) (*Session, error) {
+	cfg := defaults.Config()
+
+	handlers := opts.Handlers
+	if handlers.IsEmpty() {
+		handlers = defaults.Handlers()
+	}
+
+	// Get a merged version of the user provided config to determine if
+	// credentials were.
+	userCfg := &aws.Config{}
+	userCfg.MergeIn(cfgs...)
+	cfg.MergeIn(userCfg)
+
+	// Ordered config files will be loaded in with later files overwriting
+	// previous config file values.
+	var cfgFiles []string
+	if opts.SharedConfigFiles != nil {
+		cfgFiles = opts.SharedConfigFiles
+	} else {
+		cfgFiles = []string{envCfg.SharedConfigFile, envCfg.SharedCredentialsFile}
+		if !envCfg.EnableSharedConfig {
+			// The shared config file (~/.aws/config) is only loaded if instructed
+			// to load via the envConfig.EnableSharedConfig (AWS_SDK_LOAD_CONFIG).
+			cfgFiles = cfgFiles[1:]
+		}
+	}
+
+	// Load additional config from file(s)
+	sharedCfg, err := loadSharedConfig(envCfg.Profile, cfgFiles, envCfg.EnableSharedConfig)
+	if err != nil {
+		if len(envCfg.Profile) == 0 && !envCfg.EnableSharedConfig && (envCfg.Creds.HasKeys() || userCfg.Credentials != nil) {
+			// Special case where the user has not explicitly specified an AWS_PROFILE,
+			// or session.Options.profile, shared config is not enabled, and the
+			// environment has credentials, allow the shared config file to fail to
+			// load since the user has already provided credentials, and nothing else
+			// is required to be read file. Github(aws/aws-sdk-go#2455)
+		} else if _, ok := err.(SharedConfigProfileNotExistsError); !ok {
+			return nil, err
+		}
+	}
+
+	if err := mergeConfigSrcs(cfg, userCfg, envCfg, sharedCfg, handlers, opts); err != nil {
+		return nil, err
+	}
+
+	s := &Session{
+		Config:   cfg,
+		Handlers: handlers,
+	}
+
+	initHandlers(s)
+
+	if csmCfg, err := loadCSMConfig(envCfg, cfgFiles); err != nil {
+		if l := s.Config.Logger; l != nil {
+			l.Log(fmt.Sprintf("ERROR: failed to load CSM configuration, %v", err))
+		}
+	} else if csmCfg.Enabled {
+		err = enableCSM(&s.Handlers, csmCfg, s.Config.Logger)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	// Setup HTTP client with custom cert bundle if enabled
+	if opts.CustomCABundle != nil {
+		if err := loadCustomCABundle(s, opts.CustomCABundle); err != nil {
+			return nil, err
+		}
+	}
+
+	return s, nil
+}
+
+type csmConfig struct {
+	Enabled  bool
+	Host     string
+	Port     string
+	ClientID string
+}
+
+var csmProfileName = "aws_csm"
+
+func loadCSMConfig(envCfg envConfig, cfgFiles []string) (csmConfig, error) {
+	if envCfg.CSMEnabled != nil {
+		if *envCfg.CSMEnabled {
+			return csmConfig{
+				Enabled:  true,
+				ClientID: envCfg.CSMClientID,
+				Host:     envCfg.CSMHost,
+				Port:     envCfg.CSMPort,
+			}, nil
+		}
+		return csmConfig{}, nil
+	}
+
+	sharedCfg, err := loadSharedConfig(csmProfileName, cfgFiles, false)
+	if err != nil {
+		if _, ok := err.(SharedConfigProfileNotExistsError); !ok {
+			return csmConfig{}, err
+		}
+	}
+	if sharedCfg.CSMEnabled != nil && *sharedCfg.CSMEnabled == true {
+		return csmConfig{
+			Enabled:  true,
+			ClientID: sharedCfg.CSMClientID,
+			Host:     sharedCfg.CSMHost,
+			Port:     sharedCfg.CSMPort,
+		}, nil
+	}
+
+	return csmConfig{}, nil
+}
+
+func loadCustomCABundle(s *Session, bundle io.Reader) error {
+	var t *http.Transport
+	switch v := s.Config.HTTPClient.Transport.(type) {
+	case *http.Transport:
+		t = v
+	default:
+		if s.Config.HTTPClient.Transport != nil {
+			return awserr.New("LoadCustomCABundleError",
+				"unable to load custom CA bundle, HTTPClient's transport unsupported type", nil)
+		}
+	}
+	if t == nil {
+		// Nil transport implies `http.DefaultTransport` should be used. Since
+		// the SDK cannot modify, nor copy the `DefaultTransport` specifying
+		// the values the next closest behavior.
+		t = getCABundleTransport()
+	}
+
+	p, err := loadCertPool(bundle)
+	if err != nil {
+		return err
+	}
+	if t.TLSClientConfig == nil {
+		t.TLSClientConfig = &tls.Config{}
+	}
+	t.TLSClientConfig.RootCAs = p
+
+	s.Config.HTTPClient.Transport = t
+
+	return nil
+}
+
+func loadCertPool(r io.Reader) (*x509.CertPool, error) {
+	b, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, awserr.New("LoadCustomCABundleError",
+			"failed to read custom CA bundle PEM file", err)
+	}
+
+	p := x509.NewCertPool()
+	if !p.AppendCertsFromPEM(b) {
+		return nil, awserr.New("LoadCustomCABundleError",
+			"failed to load custom CA bundle PEM file", err)
+	}
+
+	return p, nil
+}
+
+func mergeConfigSrcs(cfg, userCfg *aws.Config,
+	envCfg envConfig, sharedCfg sharedConfig,
+	handlers request.Handlers,
+	sessOpts Options,
+) error {
+
+	// Region if not already set by user
+	if len(aws.StringValue(cfg.Region)) == 0 {
+		if len(envCfg.Region) > 0 {
+			cfg.WithRegion(envCfg.Region)
+		} else if envCfg.EnableSharedConfig && len(sharedCfg.Region) > 0 {
+			cfg.WithRegion(sharedCfg.Region)
+		}
+	}
+
+	if cfg.EnableEndpointDiscovery == nil {
+		if envCfg.EnableEndpointDiscovery != nil {
+			cfg.WithEndpointDiscovery(*envCfg.EnableEndpointDiscovery)
+		} else if envCfg.EnableSharedConfig && sharedCfg.EnableEndpointDiscovery != nil {
+			cfg.WithEndpointDiscovery(*sharedCfg.EnableEndpointDiscovery)
+		}
+	}
+
+	// Configure credentials if not already set by the user when creating the
+	// Session.
+	if cfg.Credentials == credentials.AnonymousCredentials && userCfg.Credentials == nil {
+		creds, err := resolveCredentials(cfg, envCfg, sharedCfg, handlers, sessOpts)
+		if err != nil {
+			return err
+		}
+		cfg.Credentials = creds
+	}
+
+	return nil
+}
+
+func initHandlers(s *Session) {
+	// Add the Validate parameter handler if it is not disabled.
+	s.Handlers.Validate.Remove(corehandlers.ValidateParametersHandler)
+	if !aws.BoolValue(s.Config.DisableParamValidation) {
+		s.Handlers.Validate.PushBackNamed(corehandlers.ValidateParametersHandler)
+	}
+}
+
+// Copy creates and returns a copy of the current Session, coping the config
+// and handlers. If any additional configs are provided they will be merged
+// on top of the Session's copied config.
+//
+//     // Create a copy of the current Session, configured for the us-west-2 region.
+//     sess.Copy(&aws.Config{Region: aws.String("us-west-2")})
+func (s *Session) Copy(cfgs ...*aws.Config) *Session {
+	newSession := &Session{
+		Config:   s.Config.Copy(cfgs...),
+		Handlers: s.Handlers.Copy(),
+	}
+
+	initHandlers(newSession)
+
+	return newSession
+}
+
+// ClientConfig satisfies the client.ConfigProvider interface and is used to
+// configure the service client instances. Passing the Session to the service
+// client's constructor (New) will use this method to configure the client.
+func (s *Session) ClientConfig(serviceName string, cfgs ...*aws.Config) client.Config {
+	// Backwards compatibility, the error will be eaten if user calls ClientConfig
+	// directly. All SDK services will use ClientconfigWithError.
+	cfg, _ := s.clientConfigWithErr(serviceName, cfgs...)
+
+	return cfg
+}
+
+func (s *Session) clientConfigWithErr(serviceName string, cfgs ...*aws.Config) (client.Config, error) {
+	s = s.Copy(cfgs...)
+
+	var resolved endpoints.ResolvedEndpoint
+	var err error
+
+	region := aws.StringValue(s.Config.Region)
+
+	if endpoint := aws.StringValue(s.Config.Endpoint); len(endpoint) != 0 {
+		resolved.URL = endpoints.AddScheme(endpoint, aws.BoolValue(s.Config.DisableSSL))
+		resolved.SigningRegion = region
+	} else {
+		resolved, err = s.Config.EndpointResolver.EndpointFor(
+			serviceName, region,
+			func(opt *endpoints.Options) {
+				opt.DisableSSL = aws.BoolValue(s.Config.DisableSSL)
+				opt.UseDualStack = aws.BoolValue(s.Config.UseDualStack)
+
+				// Support the condition where the service is modeled but its
+				// endpoint metadata is not available.
+				opt.ResolveUnknownService = true
+			},
+		)
+	}
+
+	return client.Config{
+		Config:             s.Config,
+		Handlers:           s.Handlers,
+		Endpoint:           resolved.URL,
+		SigningRegion:      resolved.SigningRegion,
+		SigningNameDerived: resolved.SigningNameDerived,
+		SigningName:        resolved.SigningName,
+	}, err
+}
+
+// ClientConfigNoResolveEndpoint is the same as ClientConfig with the exception
+// that the EndpointResolver will not be used to resolve the endpoint. The only
+// endpoint set must come from the aws.Config.Endpoint field.
+func (s *Session) ClientConfigNoResolveEndpoint(cfgs ...*aws.Config) client.Config {
+	s = s.Copy(cfgs...)
+
+	var resolved endpoints.ResolvedEndpoint
+
+	region := aws.StringValue(s.Config.Region)
+
+	if ep := aws.StringValue(s.Config.Endpoint); len(ep) > 0 {
+		resolved.URL = endpoints.AddScheme(ep, aws.BoolValue(s.Config.DisableSSL))
+		resolved.SigningRegion = region
+	}
+
+	return client.Config{
+		Config:             s.Config,
+		Handlers:           s.Handlers,
+		Endpoint:           resolved.URL,
+		SigningRegion:      resolved.SigningRegion,
+		SigningNameDerived: resolved.SigningNameDerived,
+		SigningName:        resolved.SigningName,
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/session/shared_config.go

@@ -0,0 +1,491 @@
+package session
+
+import (
+	"fmt"
+
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/internal/ini"
+)
+
+const (
+	// Static Credentials group
+	accessKeyIDKey  = `aws_access_key_id`     // group required
+	secretAccessKey = `aws_secret_access_key` // group required
+	sessionTokenKey = `aws_session_token`     // optional
+
+	// Assume Role Credentials group
+	roleArnKey          = `role_arn`          // group required
+	sourceProfileKey    = `source_profile`    // group required (or credential_source)
+	credentialSourceKey = `credential_source` // group required (or source_profile)
+	externalIDKey       = `external_id`       // optional
+	mfaSerialKey        = `mfa_serial`        // optional
+	roleSessionNameKey  = `role_session_name` // optional
+
+	// CSM options
+	csmEnabledKey  = `csm_enabled`
+	csmHostKey     = `csm_host`
+	csmPortKey     = `csm_port`
+	csmClientIDKey = `csm_client_id`
+
+	// Additional Config fields
+	regionKey = `region`
+
+	// endpoint discovery group
+	enableEndpointDiscoveryKey = `endpoint_discovery_enabled` // optional
+
+	// External Credential Process
+	credentialProcessKey = `credential_process` // optional
+
+	// Web Identity Token File
+	webIdentityTokenFileKey = `web_identity_token_file` // optional
+
+	// DefaultSharedConfigProfile is the default profile to be used when
+	// loading configuration from the config files if another profile name
+	// is not provided.
+	DefaultSharedConfigProfile = `default`
+)
+
+// sharedConfig represents the configuration fields of the SDK config files.
+type sharedConfig struct {
+	// Credentials values from the config file. Both aws_access_key_id and
+	// aws_secret_access_key must be provided together in the same file to be
+	// considered valid. The values will be ignored if not a complete group.
+	// aws_session_token is an optional field that can be provided if both of
+	// the other two fields are also provided.
+	//
+	//	aws_access_key_id
+	//	aws_secret_access_key
+	//	aws_session_token
+	Creds credentials.Value
+
+	CredentialSource     string
+	CredentialProcess    string
+	WebIdentityTokenFile string
+
+	RoleARN         string
+	RoleSessionName string
+	ExternalID      string
+	MFASerial       string
+
+	SourceProfileName string
+	SourceProfile     *sharedConfig
+
+	// Region is the region the SDK should use for looking up AWS service
+	// endpoints and signing requests.
+	//
+	//	region
+	Region string
+
+	// EnableEndpointDiscovery can be enabled in the shared config by setting
+	// endpoint_discovery_enabled to true
+	//
+	//	endpoint_discovery_enabled = true
+	EnableEndpointDiscovery *bool
+
+	// CSM Options
+	CSMEnabled  *bool
+	CSMHost     string
+	CSMPort     string
+	CSMClientID string
+}
+
+type sharedConfigFile struct {
+	Filename string
+	IniData  ini.Sections
+}
+
+// loadSharedConfig retrieves the configuration from the list of files using
+// the profile provided. The order the files are listed will determine
+// precedence. Values in subsequent files will overwrite values defined in
+// earlier files.
+//
+// For example, given two files A and B. Both define credentials. If the order
+// of the files are A then B, B's credential values will be used instead of
+// A's.
+//
+// See sharedConfig.setFromFile for information how the config files
+// will be loaded.
+func loadSharedConfig(profile string, filenames []string, exOpts bool) (sharedConfig, error) {
+	if len(profile) == 0 {
+		profile = DefaultSharedConfigProfile
+	}
+
+	files, err := loadSharedConfigIniFiles(filenames)
+	if err != nil {
+		return sharedConfig{}, err
+	}
+
+	cfg := sharedConfig{}
+	profiles := map[string]struct{}{}
+	if err = cfg.setFromIniFiles(profiles, profile, files, exOpts); err != nil {
+		return sharedConfig{}, err
+	}
+
+	return cfg, nil
+}
+
+func loadSharedConfigIniFiles(filenames []string) ([]sharedConfigFile, error) {
+	files := make([]sharedConfigFile, 0, len(filenames))
+
+	for _, filename := range filenames {
+		sections, err := ini.OpenFile(filename)
+		if aerr, ok := err.(awserr.Error); ok && aerr.Code() == ini.ErrCodeUnableToReadFile {
+			// Skip files which can't be opened and read for whatever reason
+			continue
+		} else if err != nil {
+			return nil, SharedConfigLoadError{Filename: filename, Err: err}
+		}
+
+		files = append(files, sharedConfigFile{
+			Filename: filename, IniData: sections,
+		})
+	}
+
+	return files, nil
+}
+
+func (cfg *sharedConfig) setFromIniFiles(profiles map[string]struct{}, profile string, files []sharedConfigFile, exOpts bool) error {
+	// Trim files from the list that don't exist.
+	var skippedFiles int
+	var profileNotFoundErr error
+	for _, f := range files {
+		if err := cfg.setFromIniFile(profile, f, exOpts); err != nil {
+			if _, ok := err.(SharedConfigProfileNotExistsError); ok {
+				// Ignore profiles not defined in individual files.
+				profileNotFoundErr = err
+				skippedFiles++
+				continue
+			}
+			return err
+		}
+	}
+	if skippedFiles == len(files) {
+		// If all files were skipped because the profile is not found, return
+		// the original profile not found error.
+		return profileNotFoundErr
+	}
+
+	if _, ok := profiles[profile]; ok {
+		// if this is the second instance of the profile the Assume Role
+		// options must be cleared because they are only valid for the
+		// first reference of a profile. The self linked instance of the
+		// profile only have credential provider options.
+		cfg.clearAssumeRoleOptions()
+	} else {
+		// First time a profile has been seen, It must either be a assume role
+		// or credentials. Assert if the credential type requires a role ARN,
+		// the ARN is also set.
+		if err := cfg.validateCredentialsRequireARN(profile); err != nil {
+			return err
+		}
+	}
+	profiles[profile] = struct{}{}
+
+	if err := cfg.validateCredentialType(); err != nil {
+		return err
+	}
+
+	// Link source profiles for assume roles
+	if len(cfg.SourceProfileName) != 0 {
+		// Linked profile via source_profile ignore credential provider
+		// options, the source profile must provide the credentials.
+		cfg.clearCredentialOptions()
+
+		srcCfg := &sharedConfig{}
+		err := srcCfg.setFromIniFiles(profiles, cfg.SourceProfileName, files, exOpts)
+		if err != nil {
+			// SourceProfile that doesn't exist is an error in configuration.
+			if _, ok := err.(SharedConfigProfileNotExistsError); ok {
+				err = SharedConfigAssumeRoleError{
+					RoleARN:       cfg.RoleARN,
+					SourceProfile: cfg.SourceProfileName,
+				}
+			}
+			return err
+		}
+
+		if !srcCfg.hasCredentials() {
+			return SharedConfigAssumeRoleError{
+				RoleARN:       cfg.RoleARN,
+				SourceProfile: cfg.SourceProfileName,
+			}
+		}
+
+		cfg.SourceProfile = srcCfg
+	}
+
+	return nil
+}
+
+// setFromFile loads the configuration from the file using the profile
+// provided. A sharedConfig pointer type value is used so that multiple config
+// file loadings can be chained.
+//
+// Only loads complete logically grouped values, and will not set fields in cfg
+// for incomplete grouped values in the config. Such as credentials. For
+// example if a config file only includes aws_access_key_id but no
+// aws_secret_access_key the aws_access_key_id will be ignored.
+func (cfg *sharedConfig) setFromIniFile(profile string, file sharedConfigFile, exOpts bool) error {
+	section, ok := file.IniData.GetSection(profile)
+	if !ok {
+		// Fallback to to alternate profile name: profile <name>
+		section, ok = file.IniData.GetSection(fmt.Sprintf("profile %s", profile))
+		if !ok {
+			return SharedConfigProfileNotExistsError{Profile: profile, Err: nil}
+		}
+	}
+
+	if exOpts {
+		// Assume Role Parameters
+		updateString(&cfg.RoleARN, section, roleArnKey)
+		updateString(&cfg.ExternalID, section, externalIDKey)
+		updateString(&cfg.MFASerial, section, mfaSerialKey)
+		updateString(&cfg.RoleSessionName, section, roleSessionNameKey)
+		updateString(&cfg.SourceProfileName, section, sourceProfileKey)
+		updateString(&cfg.CredentialSource, section, credentialSourceKey)
+
+		updateString(&cfg.Region, section, regionKey)
+	}
+
+	updateString(&cfg.CredentialProcess, section, credentialProcessKey)
+	updateString(&cfg.WebIdentityTokenFile, section, webIdentityTokenFileKey)
+
+	// Shared Credentials
+	creds := credentials.Value{
+		AccessKeyID:     section.String(accessKeyIDKey),
+		SecretAccessKey: section.String(secretAccessKey),
+		SessionToken:    section.String(sessionTokenKey),
+		ProviderName:    fmt.Sprintf("SharedConfigCredentials: %s", file.Filename),
+	}
+	if creds.HasKeys() {
+		cfg.Creds = creds
+	}
+
+	// Endpoint discovery
+	updateBoolPtr(&cfg.EnableEndpointDiscovery, section, enableEndpointDiscoveryKey)
+
+	// CSM options
+	updateBoolPtr(&cfg.CSMEnabled, section, csmEnabledKey)
+	updateString(&cfg.CSMHost, section, csmHostKey)
+	updateString(&cfg.CSMPort, section, csmPortKey)
+	updateString(&cfg.CSMClientID, section, csmClientIDKey)
+
+	return nil
+}
+
+func (cfg *sharedConfig) validateCredentialsRequireARN(profile string) error {
+	var credSource string
+
+	switch {
+	case len(cfg.SourceProfileName) != 0:
+		credSource = sourceProfileKey
+	case len(cfg.CredentialSource) != 0:
+		credSource = credentialSourceKey
+	case len(cfg.WebIdentityTokenFile) != 0:
+		credSource = webIdentityTokenFileKey
+	}
+
+	if len(credSource) != 0 && len(cfg.RoleARN) == 0 {
+		return CredentialRequiresARNError{
+			Type:    credSource,
+			Profile: profile,
+		}
+	}
+
+	return nil
+}
+
+func (cfg *sharedConfig) validateCredentialType() error {
+	// Only one or no credential type can be defined.
+	if !oneOrNone(
+		len(cfg.SourceProfileName) != 0,
+		len(cfg.CredentialSource) != 0,
+		len(cfg.CredentialProcess) != 0,
+		len(cfg.WebIdentityTokenFile) != 0,
+	) {
+		return ErrSharedConfigSourceCollision
+	}
+
+	return nil
+}
+
+func (cfg *sharedConfig) hasCredentials() bool {
+	switch {
+	case len(cfg.SourceProfileName) != 0:
+	case len(cfg.CredentialSource) != 0:
+	case len(cfg.CredentialProcess) != 0:
+	case len(cfg.WebIdentityTokenFile) != 0:
+	case cfg.Creds.HasKeys():
+	default:
+		return false
+	}
+
+	return true
+}
+
+func (cfg *sharedConfig) clearCredentialOptions() {
+	cfg.CredentialSource = ""
+	cfg.CredentialProcess = ""
+	cfg.WebIdentityTokenFile = ""
+	cfg.Creds = credentials.Value{}
+}
+
+func (cfg *sharedConfig) clearAssumeRoleOptions() {
+	cfg.RoleARN = ""
+	cfg.ExternalID = ""
+	cfg.MFASerial = ""
+	cfg.RoleSessionName = ""
+	cfg.SourceProfileName = ""
+}
+
+func oneOrNone(bs ...bool) bool {
+	var count int
+
+	for _, b := range bs {
+		if b {
+			count++
+			if count > 1 {
+				return false
+			}
+		}
+	}
+
+	return true
+}
+
+// updateString will only update the dst with the value in the section key, key
+// is present in the section.
+func updateString(dst *string, section ini.Section, key string) {
+	if !section.Has(key) {
+		return
+	}
+	*dst = section.String(key)
+}
+
+// updateBoolPtr will only update the dst with the value in the section key,
+// key is present in the section.
+func updateBoolPtr(dst **bool, section ini.Section, key string) {
+	if !section.Has(key) {
+		return
+	}
+	*dst = new(bool)
+	**dst = section.Bool(key)
+}
+
+// SharedConfigLoadError is an error for the shared config file failed to load.
+type SharedConfigLoadError struct {
+	Filename string
+	Err      error
+}
+
+// Code is the short id of the error.
+func (e SharedConfigLoadError) Code() string {
+	return "SharedConfigLoadError"
+}
+
+// Message is the description of the error
+func (e SharedConfigLoadError) Message() string {
+	return fmt.Sprintf("failed to load config file, %s", e.Filename)
+}
+
+// OrigErr is the underlying error that caused the failure.
+func (e SharedConfigLoadError) OrigErr() error {
+	return e.Err
+}
+
+// Error satisfies the error interface.
+func (e SharedConfigLoadError) Error() string {
+	return awserr.SprintError(e.Code(), e.Message(), "", e.Err)
+}
+
+// SharedConfigProfileNotExistsError is an error for the shared config when
+// the profile was not find in the config file.
+type SharedConfigProfileNotExistsError struct {
+	Profile string
+	Err     error
+}
+
+// Code is the short id of the error.
+func (e SharedConfigProfileNotExistsError) Code() string {
+	return "SharedConfigProfileNotExistsError"
+}
+
+// Message is the description of the error
+func (e SharedConfigProfileNotExistsError) Message() string {
+	return fmt.Sprintf("failed to get profile, %s", e.Profile)
+}
+
+// OrigErr is the underlying error that caused the failure.
+func (e SharedConfigProfileNotExistsError) OrigErr() error {
+	return e.Err
+}
+
+// Error satisfies the error interface.
+func (e SharedConfigProfileNotExistsError) Error() string {
+	return awserr.SprintError(e.Code(), e.Message(), "", e.Err)
+}
+
+// SharedConfigAssumeRoleError is an error for the shared config when the
+// profile contains assume role information, but that information is invalid
+// or not complete.
+type SharedConfigAssumeRoleError struct {
+	RoleARN       string
+	SourceProfile string
+}
+
+// Code is the short id of the error.
+func (e SharedConfigAssumeRoleError) Code() string {
+	return "SharedConfigAssumeRoleError"
+}
+
+// Message is the description of the error
+func (e SharedConfigAssumeRoleError) Message() string {
+	return fmt.Sprintf(
+		"failed to load assume role for %s, source profile %s has no shared credentials",
+		e.RoleARN, e.SourceProfile,
+	)
+}
+
+// OrigErr is the underlying error that caused the failure.
+func (e SharedConfigAssumeRoleError) OrigErr() error {
+	return nil
+}
+
+// Error satisfies the error interface.
+func (e SharedConfigAssumeRoleError) Error() string {
+	return awserr.SprintError(e.Code(), e.Message(), "", nil)
+}
+
+// CredentialRequiresARNError provides the error for shared config credentials
+// that are incorrectly configured in the shared config or credentials file.
+type CredentialRequiresARNError struct {
+	// type of credentials that were configured.
+	Type string
+
+	// Profile name the credentials were in.
+	Profile string
+}
+
+// Code is the short id of the error.
+func (e CredentialRequiresARNError) Code() string {
+	return "CredentialRequiresARNError"
+}
+
+// Message is the description of the error
+func (e CredentialRequiresARNError) Message() string {
+	return fmt.Sprintf(
+		"credential type %s requires role_arn, profile %s",
+		e.Type, e.Profile,
+	)
+}
+
+// OrigErr is the underlying error that caused the failure.
+func (e CredentialRequiresARNError) OrigErr() error {
+	return nil
+}
+
+// Error satisfies the error interface.
+func (e CredentialRequiresARNError) Error() string {
+	return awserr.SprintError(e.Code(), e.Message(), "", nil)
+}

vendor/github.com/aws/aws-sdk-go/aws/signer/v4/header_rules.go

@@ -0,0 +1,82 @@
+package v4
+
+import (
+	"net/http"
+	"strings"
+)
+
+// validator houses a set of rule needed for validation of a
+// string value
+type rules []rule
+
+// rule interface allows for more flexible rules and just simply
+// checks whether or not a value adheres to that rule
+type rule interface {
+	IsValid(value string) bool
+}
+
+// IsValid will iterate through all rules and see if any rules
+// apply to the value and supports nested rules
+func (r rules) IsValid(value string) bool {
+	for _, rule := range r {
+		if rule.IsValid(value) {
+			return true
+		}
+	}
+	return false
+}
+
+// mapRule generic rule for maps
+type mapRule map[string]struct{}
+
+// IsValid for the map rule satisfies whether it exists in the map
+func (m mapRule) IsValid(value string) bool {
+	_, ok := m[value]
+	return ok
+}
+
+// whitelist is a generic rule for whitelisting
+type whitelist struct {
+	rule
+}
+
+// IsValid for whitelist checks if the value is within the whitelist
+func (w whitelist) IsValid(value string) bool {
+	return w.rule.IsValid(value)
+}
+
+// blacklist is a generic rule for blacklisting
+type blacklist struct {
+	rule
+}
+
+// IsValid for whitelist checks if the value is within the whitelist
+func (b blacklist) IsValid(value string) bool {
+	return !b.rule.IsValid(value)
+}
+
+type patterns []string
+
+// IsValid for patterns checks each pattern and returns if a match has
+// been found
+func (p patterns) IsValid(value string) bool {
+	for _, pattern := range p {
+		if strings.HasPrefix(http.CanonicalHeaderKey(value), pattern) {
+			return true
+		}
+	}
+	return false
+}
+
+// inclusiveRules rules allow for rules to depend on one another
+type inclusiveRules []rule
+
+// IsValid will return true if all rules are true
+func (r inclusiveRules) IsValid(value string) bool {
+	for _, rule := range r {
+		if !rule.IsValid(value) {
+			return false
+		}
+	}
+	return true
+}

vendor/github.com/aws/aws-sdk-go/aws/signer/v4/options.go

@@ -0,0 +1,7 @@
+package v4
+
+// WithUnsignedPayload will enable and set the UnsignedPayload field to
+// true of the signer.
+func WithUnsignedPayload(v4 *Signer) {
+	v4.UnsignedPayload = true
+}

vendor/github.com/aws/aws-sdk-go/aws/signer/v4/uri_path.go

@@ -0,0 +1,24 @@
+// +build go1.5
+
+package v4
+
+import (
+	"net/url"
+	"strings"
+)
+
+func getURIPath(u *url.URL) string {
+	var uri string
+
+	if len(u.Opaque) > 0 {
+		uri = "/" + strings.Join(strings.Split(u.Opaque, "/")[3:], "/")
+	} else {
+		uri = u.EscapedPath()
+	}
+
+	if len(uri) == 0 {
+		uri = "/"
+	}
+
+	return uri
+}

vendor/github.com/aws/aws-sdk-go/aws/signer/v4/v4.go

@@ -0,0 +1,806 @@
+// Package v4 implements signing for AWS V4 signer
+//
+// Provides request signing for request that need to be signed with
+// AWS V4 Signatures.
+//
+// Standalone Signer
+//
+// Generally using the signer outside of the SDK should not require any additional
+// logic when using Go v1.5 or higher. The signer does this by taking advantage
+// of the URL.EscapedPath method. If your request URI requires additional escaping
+// you many need to use the URL.Opaque to define what the raw URI should be sent
+// to the service as.
+//
+// The signer will first check the URL.Opaque field, and use its value if set.
+// The signer does require the URL.Opaque field to be set in the form of:
+//
+//     "//<hostname>/<path>"
+//
+//     // e.g.
+//     "//example.com/some/path"
+//
+// The leading "//" and hostname are required or the URL.Opaque escaping will
+// not work correctly.
+//
+// If URL.Opaque is not set the signer will fallback to the URL.EscapedPath()
+// method and using the returned value. If you're using Go v1.4 you must set
+// URL.Opaque if the URI path needs escaping. If URL.Opaque is not set with
+// Go v1.5 the signer will fallback to URL.Path.
+//
+// AWS v4 signature validation requires that the canonical string's URI path
+// element must be the URI escaped form of the HTTP request's path.
+// http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
+//
+// The Go HTTP client will perform escaping automatically on the request. Some
+// of these escaping may cause signature validation errors because the HTTP
+// request differs from the URI path or query that the signature was generated.
+// https://golang.org/pkg/net/url/#URL.EscapedPath
+//
+// Because of this, it is recommended that when using the signer outside of the
+// SDK that explicitly escaping the request prior to being signed is preferable,
+// and will help prevent signature validation errors. This can be done by setting
+// the URL.Opaque or URL.RawPath. The SDK will use URL.Opaque first and then
+// call URL.EscapedPath() if Opaque is not set.
+//
+// If signing a request intended for HTTP2 server, and you're using Go 1.6.2
+// through 1.7.4 you should use the URL.RawPath as the pre-escaped form of the
+// request URL. https://github.com/golang/go/issues/16847 points to a bug in
+// Go pre 1.8 that fails to make HTTP2 requests using absolute URL in the HTTP
+// message. URL.Opaque generally will force Go to make requests with absolute URL.
+// URL.RawPath does not do this, but RawPath must be a valid escaping of Path
+// or url.EscapedPath will ignore the RawPath escaping.
+//
+// Test `TestStandaloneSign` provides a complete example of using the signer
+// outside of the SDK and pre-escaping the URI path.
+package v4
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/sdkio"
+	"github.com/aws/aws-sdk-go/private/protocol/rest"
+)
+
+const (
+	authHeaderPrefix = "AWS4-HMAC-SHA256"
+	timeFormat       = "20060102T150405Z"
+	shortTimeFormat  = "20060102"
+
+	// emptyStringSHA256 is a SHA256 of an empty string
+	emptyStringSHA256 = `e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855`
+)
+
+var ignoredHeaders = rules{
+	blacklist{
+		mapRule{
+			"Authorization":   struct{}{},
+			"User-Agent":      struct{}{},
+			"X-Amzn-Trace-Id": struct{}{},
+		},
+	},
+}
+
+// requiredSignedHeaders is a whitelist for build canonical headers.
+var requiredSignedHeaders = rules{
+	whitelist{
+		mapRule{
+			"Cache-Control":                         struct{}{},
+			"Content-Disposition":                   struct{}{},
+			"Content-Encoding":                      struct{}{},
+			"Content-Language":                      struct{}{},
+			"Content-Md5":                           struct{}{},
+			"Content-Type":                          struct{}{},
+			"Expires":                               struct{}{},
+			"If-Match":                              struct{}{},
+			"If-Modified-Since":                     struct{}{},
+			"If-None-Match":                         struct{}{},
+			"If-Unmodified-Since":                   struct{}{},
+			"Range":                                 struct{}{},
+			"X-Amz-Acl":                             struct{}{},
+			"X-Amz-Copy-Source":                     struct{}{},
+			"X-Amz-Copy-Source-If-Match":            struct{}{},
+			"X-Amz-Copy-Source-If-Modified-Since":   struct{}{},
+			"X-Amz-Copy-Source-If-None-Match":       struct{}{},
+			"X-Amz-Copy-Source-If-Unmodified-Since": struct{}{},
+			"X-Amz-Copy-Source-Range":               struct{}{},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": struct{}{},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       struct{}{},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   struct{}{},
+			"X-Amz-Grant-Full-control":                                    struct{}{},
+			"X-Amz-Grant-Read":                                            struct{}{},
+			"X-Amz-Grant-Read-Acp":                                        struct{}{},
+			"X-Amz-Grant-Write":                                           struct{}{},
+			"X-Amz-Grant-Write-Acp":                                       struct{}{},
+			"X-Amz-Metadata-Directive":                                    struct{}{},
+			"X-Amz-Mfa":                                                   struct{}{},
+			"X-Amz-Request-Payer":                                         struct{}{},
+			"X-Amz-Server-Side-Encryption":                                struct{}{},
+			"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id":                 struct{}{},
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm":             struct{}{},
+			"X-Amz-Server-Side-Encryption-Customer-Key":                   struct{}{},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":               struct{}{},
+			"X-Amz-Storage-Class":                                         struct{}{},
+			"X-Amz-Tagging":                                               struct{}{},
+			"X-Amz-Website-Redirect-Location":                             struct{}{},
+			"X-Amz-Content-Sha256":                                        struct{}{},
+		},
+	},
+	patterns{"X-Amz-Meta-"},
+}
+
+// allowedHoisting is a whitelist for build query headers. The boolean value
+// represents whether or not it is a pattern.
+var allowedQueryHoisting = inclusiveRules{
+	blacklist{requiredSignedHeaders},
+	patterns{"X-Amz-"},
+}
+
+// Signer applies AWS v4 signing to given request. Use this to sign requests
+// that need to be signed with AWS V4 Signatures.
+type Signer struct {
+	// The authentication credentials the request will be signed against.
+	// This value must be set to sign requests.
+	Credentials *credentials.Credentials
+
+	// Sets the log level the signer should use when reporting information to
+	// the logger. If the logger is nil nothing will be logged. See
+	// aws.LogLevelType for more information on available logging levels
+	//
+	// By default nothing will be logged.
+	Debug aws.LogLevelType
+
+	// The logger loging information will be written to. If there the logger
+	// is nil, nothing will be logged.
+	Logger aws.Logger
+
+	// Disables the Signer's moving HTTP header key/value pairs from the HTTP
+	// request header to the request's query string. This is most commonly used
+	// with pre-signed requests preventing headers from being added to the
+	// request's query string.
+	DisableHeaderHoisting bool
+
+	// Disables the automatic escaping of the URI path of the request for the
+	// siganture's canonical string's path. For services that do not need additional
+	// escaping then use this to disable the signer escaping the path.
+	//
+	// S3 is an example of a service that does not need additional escaping.
+	//
+	// http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
+	DisableURIPathEscaping bool
+
+	// Disables the automatical setting of the HTTP request's Body field with the
+	// io.ReadSeeker passed in to the signer. This is useful if you're using a
+	// custom wrapper around the body for the io.ReadSeeker and want to preserve
+	// the Body value on the Request.Body.
+	//
+	// This does run the risk of signing a request with a body that will not be
+	// sent in the request. Need to ensure that the underlying data of the Body
+	// values are the same.
+	DisableRequestBodyOverwrite bool
+
+	// currentTimeFn returns the time value which represents the current time.
+	// This value should only be used for testing. If it is nil the default
+	// time.Now will be used.
+	currentTimeFn func() time.Time
+
+	// UnsignedPayload will prevent signing of the payload. This will only
+	// work for services that have support for this.
+	UnsignedPayload bool
+}
+
+// NewSigner returns a Signer pointer configured with the credentials and optional
+// option values provided. If not options are provided the Signer will use its
+// default configuration.
+func NewSigner(credentials *credentials.Credentials, options ...func(*Signer)) *Signer {
+	v4 := &Signer{
+		Credentials: credentials,
+	}
+
+	for _, option := range options {
+		option(v4)
+	}
+
+	return v4
+}
+
+type signingCtx struct {
+	ServiceName      string
+	Region           string
+	Request          *http.Request
+	Body             io.ReadSeeker
+	Query            url.Values
+	Time             time.Time
+	ExpireTime       time.Duration
+	SignedHeaderVals http.Header
+
+	DisableURIPathEscaping bool
+
+	credValues         credentials.Value
+	isPresign          bool
+	formattedTime      string
+	formattedShortTime string
+	unsignedPayload    bool
+
+	bodyDigest       string
+	signedHeaders    string
+	canonicalHeaders string
+	canonicalString  string
+	credentialString string
+	stringToSign     string
+	signature        string
+	authorization    string
+}
+
+// Sign signs AWS v4 requests with the provided body, service name, region the
+// request is made to, and time the request is signed at. The signTime allows
+// you to specify that a request is signed for the future, and cannot be
+// used until then.
+//
+// Returns a list of HTTP headers that were included in the signature or an
+// error if signing the request failed. Generally for signed requests this value
+// is not needed as the full request context will be captured by the http.Request
+// value. It is included for reference though.
+//
+// Sign will set the request's Body to be the `body` parameter passed in. If
+// the body is not already an io.ReadCloser, it will be wrapped within one. If
+// a `nil` body parameter passed to Sign, the request's Body field will be
+// also set to nil. Its important to note that this functionality will not
+// change the request's ContentLength of the request.
+//
+// Sign differs from Presign in that it will sign the request using HTTP
+// header values. This type of signing is intended for http.Request values that
+// will not be shared, or are shared in a way the header values on the request
+// will not be lost.
+//
+// The requests body is an io.ReadSeeker so the SHA256 of the body can be
+// generated. To bypass the signer computing the hash you can set the
+// "X-Amz-Content-Sha256" header with a precomputed value. The signer will
+// only compute the hash if the request header value is empty.
+func (v4 Signer) Sign(r *http.Request, body io.ReadSeeker, service, region string, signTime time.Time) (http.Header, error) {
+	return v4.signWithBody(r, body, service, region, 0, false, signTime)
+}
+
+// Presign signs AWS v4 requests with the provided body, service name, region
+// the request is made to, and time the request is signed at. The signTime
+// allows you to specify that a request is signed for the future, and cannot
+// be used until then.
+//
+// Returns a list of HTTP headers that were included in the signature or an
+// error if signing the request failed. For presigned requests these headers
+// and their values must be included on the HTTP request when it is made. This
+// is helpful to know what header values need to be shared with the party the
+// presigned request will be distributed to.
+//
+// Presign differs from Sign in that it will sign the request using query string
+// instead of header values. This allows you to share the Presigned Request's
+// URL with third parties, or distribute it throughout your system with minimal
+// dependencies.
+//
+// Presign also takes an exp value which is the duration the
+// signed request will be valid after the signing time. This is allows you to
+// set when the request will expire.
+//
+// The requests body is an io.ReadSeeker so the SHA256 of the body can be
+// generated. To bypass the signer computing the hash you can set the
+// "X-Amz-Content-Sha256" header with a precomputed value. The signer will
+// only compute the hash if the request header value is empty.
+//
+// Presigning a S3 request will not compute the body's SHA256 hash by default.
+// This is done due to the general use case for S3 presigned URLs is to share
+// PUT/GET capabilities. If you would like to include the body's SHA256 in the
+// presigned request's signature you can set the "X-Amz-Content-Sha256"
+// HTTP header and that will be included in the request's signature.
+func (v4 Signer) Presign(r *http.Request, body io.ReadSeeker, service, region string, exp time.Duration, signTime time.Time) (http.Header, error) {
+	return v4.signWithBody(r, body, service, region, exp, true, signTime)
+}
+
+func (v4 Signer) signWithBody(r *http.Request, body io.ReadSeeker, service, region string, exp time.Duration, isPresign bool, signTime time.Time) (http.Header, error) {
+	currentTimeFn := v4.currentTimeFn
+	if currentTimeFn == nil {
+		currentTimeFn = time.Now
+	}
+
+	ctx := &signingCtx{
+		Request:                r,
+		Body:                   body,
+		Query:                  r.URL.Query(),
+		Time:                   signTime,
+		ExpireTime:             exp,
+		isPresign:              isPresign,
+		ServiceName:            service,
+		Region:                 region,
+		DisableURIPathEscaping: v4.DisableURIPathEscaping,
+		unsignedPayload:        v4.UnsignedPayload,
+	}
+
+	for key := range ctx.Query {
+		sort.Strings(ctx.Query[key])
+	}
+
+	if ctx.isRequestSigned() {
+		ctx.Time = currentTimeFn()
+		ctx.handlePresignRemoval()
+	}
+
+	var err error
+	ctx.credValues, err = v4.Credentials.Get()
+	if err != nil {
+		return http.Header{}, err
+	}
+
+	ctx.sanitizeHostForHeader()
+	ctx.assignAmzQueryValues()
+	if err := ctx.build(v4.DisableHeaderHoisting); err != nil {
+		return nil, err
+	}
+
+	// If the request is not presigned the body should be attached to it. This
+	// prevents the confusion of wanting to send a signed request without
+	// the body the request was signed for attached.
+	if !(v4.DisableRequestBodyOverwrite || ctx.isPresign) {
+		var reader io.ReadCloser
+		if body != nil {
+			var ok bool
+			if reader, ok = body.(io.ReadCloser); !ok {
+				reader = ioutil.NopCloser(body)
+			}
+		}
+		r.Body = reader
+	}
+
+	if v4.Debug.Matches(aws.LogDebugWithSigning) {
+		v4.logSigningInfo(ctx)
+	}
+
+	return ctx.SignedHeaderVals, nil
+}
+
+func (ctx *signingCtx) sanitizeHostForHeader() {
+	request.SanitizeHostForHeader(ctx.Request)
+}
+
+func (ctx *signingCtx) handlePresignRemoval() {
+	if !ctx.isPresign {
+		return
+	}
+
+	// The credentials have expired for this request. The current signing
+	// is invalid, and needs to be request because the request will fail.
+	ctx.removePresign()
+
+	// Update the request's query string to ensure the values stays in
+	// sync in the case retrieving the new credentials fails.
+	ctx.Request.URL.RawQuery = ctx.Query.Encode()
+}
+
+func (ctx *signingCtx) assignAmzQueryValues() {
+	if ctx.isPresign {
+		ctx.Query.Set("X-Amz-Algorithm", authHeaderPrefix)
+		if ctx.credValues.SessionToken != "" {
+			ctx.Query.Set("X-Amz-Security-Token", ctx.credValues.SessionToken)
+		} else {
+			ctx.Query.Del("X-Amz-Security-Token")
+		}
+
+		return
+	}
+
+	if ctx.credValues.SessionToken != "" {
+		ctx.Request.Header.Set("X-Amz-Security-Token", ctx.credValues.SessionToken)
+	}
+}
+
+// SignRequestHandler is a named request handler the SDK will use to sign
+// service client request with using the V4 signature.
+var SignRequestHandler = request.NamedHandler{
+	Name: "v4.SignRequestHandler", Fn: SignSDKRequest,
+}
+
+// SignSDKRequest signs an AWS request with the V4 signature. This
+// request handler should only be used with the SDK's built in service client's
+// API operation requests.
+//
+// This function should not be used on its on its own, but in conjunction with
+// an AWS service client's API operation call. To sign a standalone request
+// not created by a service client's API operation method use the "Sign" or
+// "Presign" functions of the "Signer" type.
+//
+// If the credentials of the request's config are set to
+// credentials.AnonymousCredentials the request will not be signed.
+func SignSDKRequest(req *request.Request) {
+	SignSDKRequestWithCurrentTime(req, time.Now)
+}
+
+// BuildNamedHandler will build a generic handler for signing.
+func BuildNamedHandler(name string, opts ...func(*Signer)) request.NamedHandler {
+	return request.NamedHandler{
+		Name: name,
+		Fn: func(req *request.Request) {
+			SignSDKRequestWithCurrentTime(req, time.Now, opts...)
+		},
+	}
+}
+
+// SignSDKRequestWithCurrentTime will sign the SDK's request using the time
+// function passed in. Behaves the same as SignSDKRequest with the exception
+// the request is signed with the value returned by the current time function.
+func SignSDKRequestWithCurrentTime(req *request.Request, curTimeFn func() time.Time, opts ...func(*Signer)) {
+	// If the request does not need to be signed ignore the signing of the
+	// request if the AnonymousCredentials object is used.
+	if req.Config.Credentials == credentials.AnonymousCredentials {
+		return
+	}
+
+	region := req.ClientInfo.SigningRegion
+	if region == "" {
+		region = aws.StringValue(req.Config.Region)
+	}
+
+	name := req.ClientInfo.SigningName
+	if name == "" {
+		name = req.ClientInfo.ServiceName
+	}
+
+	v4 := NewSigner(req.Config.Credentials, func(v4 *Signer) {
+		v4.Debug = req.Config.LogLevel.Value()
+		v4.Logger = req.Config.Logger
+		v4.DisableHeaderHoisting = req.NotHoist
+		v4.currentTimeFn = curTimeFn
+		if name == "s3" {
+			// S3 service should not have any escaping applied
+			v4.DisableURIPathEscaping = true
+		}
+		// Prevents setting the HTTPRequest's Body. Since the Body could be
+		// wrapped in a custom io.Closer that we do not want to be stompped
+		// on top of by the signer.
+		v4.DisableRequestBodyOverwrite = true
+	})
+
+	for _, opt := range opts {
+		opt(v4)
+	}
+
+	curTime := curTimeFn()
+	signedHeaders, err := v4.signWithBody(req.HTTPRequest, req.GetBody(),
+		name, region, req.ExpireTime, req.ExpireTime > 0, curTime,
+	)
+	if err != nil {
+		req.Error = err
+		req.SignedHeaderVals = nil
+		return
+	}
+
+	req.SignedHeaderVals = signedHeaders
+	req.LastSignedAt = curTime
+}
+
+const logSignInfoMsg = `DEBUG: Request Signature:
+---[ CANONICAL STRING  ]-----------------------------
+%s
+---[ STRING TO SIGN ]--------------------------------
+%s%s
+-----------------------------------------------------`
+const logSignedURLMsg = `
+---[ SIGNED URL ]------------------------------------
+%s`
+
+func (v4 *Signer) logSigningInfo(ctx *signingCtx) {
+	signedURLMsg := ""
+	if ctx.isPresign {
+		signedURLMsg = fmt.Sprintf(logSignedURLMsg, ctx.Request.URL.String())
+	}
+	msg := fmt.Sprintf(logSignInfoMsg, ctx.canonicalString, ctx.stringToSign, signedURLMsg)
+	v4.Logger.Log(msg)
+}
+
+func (ctx *signingCtx) build(disableHeaderHoisting bool) error {
+	ctx.buildTime()             // no depends
+	ctx.buildCredentialString() // no depends
+
+	if err := ctx.buildBodyDigest(); err != nil {
+		return err
+	}
+
+	unsignedHeaders := ctx.Request.Header
+	if ctx.isPresign {
+		if !disableHeaderHoisting {
+			urlValues := url.Values{}
+			urlValues, unsignedHeaders = buildQuery(allowedQueryHoisting, unsignedHeaders) // no depends
+			for k := range urlValues {
+				ctx.Query[k] = urlValues[k]
+			}
+		}
+	}
+
+	ctx.buildCanonicalHeaders(ignoredHeaders, unsignedHeaders)
+	ctx.buildCanonicalString() // depends on canon headers / signed headers
+	ctx.buildStringToSign()    // depends on canon string
+	ctx.buildSignature()       // depends on string to sign
+
+	if ctx.isPresign {
+		ctx.Request.URL.RawQuery += "&X-Amz-Signature=" + ctx.signature
+	} else {
+		parts := []string{
+			authHeaderPrefix + " Credential=" + ctx.credValues.AccessKeyID + "/" + ctx.credentialString,
+			"SignedHeaders=" + ctx.signedHeaders,
+			"Signature=" + ctx.signature,
+		}
+		ctx.Request.Header.Set("Authorization", strings.Join(parts, ", "))
+	}
+
+	return nil
+}
+
+func (ctx *signingCtx) buildTime() {
+	ctx.formattedTime = ctx.Time.UTC().Format(timeFormat)
+	ctx.formattedShortTime = ctx.Time.UTC().Format(shortTimeFormat)
+
+	if ctx.isPresign {
+		duration := int64(ctx.ExpireTime / time.Second)
+		ctx.Query.Set("X-Amz-Date", ctx.formattedTime)
+		ctx.Query.Set("X-Amz-Expires", strconv.FormatInt(duration, 10))
+	} else {
+		ctx.Request.Header.Set("X-Amz-Date", ctx.formattedTime)
+	}
+}
+
+func (ctx *signingCtx) buildCredentialString() {
+	ctx.credentialString = strings.Join([]string{
+		ctx.formattedShortTime,
+		ctx.Region,
+		ctx.ServiceName,
+		"aws4_request",
+	}, "/")
+
+	if ctx.isPresign {
+		ctx.Query.Set("X-Amz-Credential", ctx.credValues.AccessKeyID+"/"+ctx.credentialString)
+	}
+}
+
+func buildQuery(r rule, header http.Header) (url.Values, http.Header) {
+	query := url.Values{}
+	unsignedHeaders := http.Header{}
+	for k, h := range header {
+		if r.IsValid(k) {
+			query[k] = h
+		} else {
+			unsignedHeaders[k] = h
+		}
+	}
+
+	return query, unsignedHeaders
+}
+func (ctx *signingCtx) buildCanonicalHeaders(r rule, header http.Header) {
+	var headers []string
+	headers = append(headers, "host")
+	for k, v := range header {
+		canonicalKey := http.CanonicalHeaderKey(k)
+		if !r.IsValid(canonicalKey) {
+			continue // ignored header
+		}
+		if ctx.SignedHeaderVals == nil {
+			ctx.SignedHeaderVals = make(http.Header)
+		}
+
+		lowerCaseKey := strings.ToLower(k)
+		if _, ok := ctx.SignedHeaderVals[lowerCaseKey]; ok {
+			// include additional values
+			ctx.SignedHeaderVals[lowerCaseKey] = append(ctx.SignedHeaderVals[lowerCaseKey], v...)
+			continue
+		}
+
+		headers = append(headers, lowerCaseKey)
+		ctx.SignedHeaderVals[lowerCaseKey] = v
+	}
+	sort.Strings(headers)
+
+	ctx.signedHeaders = strings.Join(headers, ";")
+
+	if ctx.isPresign {
+		ctx.Query.Set("X-Amz-SignedHeaders", ctx.signedHeaders)
+	}
+
+	headerValues := make([]string, len(headers))
+	for i, k := range headers {
+		if k == "host" {
+			if ctx.Request.Host != "" {
+				headerValues[i] = "host:" + ctx.Request.Host
+			} else {
+				headerValues[i] = "host:" + ctx.Request.URL.Host
+			}
+		} else {
+			headerValues[i] = k + ":" +
+				strings.Join(ctx.SignedHeaderVals[k], ",")
+		}
+	}
+	stripExcessSpaces(headerValues)
+	ctx.canonicalHeaders = strings.Join(headerValues, "\n")
+}
+
+func (ctx *signingCtx) buildCanonicalString() {
+	ctx.Request.URL.RawQuery = strings.Replace(ctx.Query.Encode(), "+", "%20", -1)
+
+	uri := getURIPath(ctx.Request.URL)
+
+	if !ctx.DisableURIPathEscaping {
+		uri = rest.EscapePath(uri, false)
+	}
+
+	ctx.canonicalString = strings.Join([]string{
+		ctx.Request.Method,
+		uri,
+		ctx.Request.URL.RawQuery,
+		ctx.canonicalHeaders + "\n",
+		ctx.signedHeaders,
+		ctx.bodyDigest,
+	}, "\n")
+}
+
+func (ctx *signingCtx) buildStringToSign() {
+	ctx.stringToSign = strings.Join([]string{
+		authHeaderPrefix,
+		ctx.formattedTime,
+		ctx.credentialString,
+		hex.EncodeToString(makeSha256([]byte(ctx.canonicalString))),
+	}, "\n")
+}
+
+func (ctx *signingCtx) buildSignature() {
+	secret := ctx.credValues.SecretAccessKey
+	date := makeHmac([]byte("AWS4"+secret), []byte(ctx.formattedShortTime))
+	region := makeHmac(date, []byte(ctx.Region))
+	service := makeHmac(region, []byte(ctx.ServiceName))
+	credentials := makeHmac(service, []byte("aws4_request"))
+	signature := makeHmac(credentials, []byte(ctx.stringToSign))
+	ctx.signature = hex.EncodeToString(signature)
+}
+
+func (ctx *signingCtx) buildBodyDigest() error {
+	hash := ctx.Request.Header.Get("X-Amz-Content-Sha256")
+	if hash == "" {
+		includeSHA256Header := ctx.unsignedPayload ||
+			ctx.ServiceName == "s3" ||
+			ctx.ServiceName == "glacier"
+
+		s3Presign := ctx.isPresign && ctx.ServiceName == "s3"
+
+		if ctx.unsignedPayload || s3Presign {
+			hash = "UNSIGNED-PAYLOAD"
+			includeSHA256Header = !s3Presign
+		} else if ctx.Body == nil {
+			hash = emptyStringSHA256
+		} else {
+			if !aws.IsReaderSeekable(ctx.Body) {
+				return fmt.Errorf("cannot use unseekable request body %T, for signed request with body", ctx.Body)
+			}
+			hashBytes, err := makeSha256Reader(ctx.Body)
+			if err != nil {
+				return err
+			}
+			hash = hex.EncodeToString(hashBytes)
+		}
+
+		if includeSHA256Header {
+			ctx.Request.Header.Set("X-Amz-Content-Sha256", hash)
+		}
+	}
+	ctx.bodyDigest = hash
+
+	return nil
+}
+
+// isRequestSigned returns if the request is currently signed or presigned
+func (ctx *signingCtx) isRequestSigned() bool {
+	if ctx.isPresign && ctx.Query.Get("X-Amz-Signature") != "" {
+		return true
+	}
+	if ctx.Request.Header.Get("Authorization") != "" {
+		return true
+	}
+
+	return false
+}
+
+// unsign removes signing flags for both signed and presigned requests.
+func (ctx *signingCtx) removePresign() {
+	ctx.Query.Del("X-Amz-Algorithm")
+	ctx.Query.Del("X-Amz-Signature")
+	ctx.Query.Del("X-Amz-Security-Token")
+	ctx.Query.Del("X-Amz-Date")
+	ctx.Query.Del("X-Amz-Expires")
+	ctx.Query.Del("X-Amz-Credential")
+	ctx.Query.Del("X-Amz-SignedHeaders")
+}
+
+func makeHmac(key []byte, data []byte) []byte {
+	hash := hmac.New(sha256.New, key)
+	hash.Write(data)
+	return hash.Sum(nil)
+}
+
+func makeSha256(data []byte) []byte {
+	hash := sha256.New()
+	hash.Write(data)
+	return hash.Sum(nil)
+}
+
+func makeSha256Reader(reader io.ReadSeeker) (hashBytes []byte, err error) {
+	hash := sha256.New()
+	start, err := reader.Seek(0, sdkio.SeekCurrent)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		// ensure error is return if unable to seek back to start of payload.
+		_, err = reader.Seek(start, sdkio.SeekStart)
+	}()
+
+	// Use CopyN to avoid allocating the 32KB buffer in io.Copy for bodies
+	// smaller than 32KB. Fall back to io.Copy if we fail to determine the size.
+	size, err := aws.SeekerLen(reader)
+	if err != nil {
+		io.Copy(hash, reader)
+	} else {
+		io.CopyN(hash, reader, size)
+	}
+
+	return hash.Sum(nil), nil
+}
+
+const doubleSpace = "  "
+
+// stripExcessSpaces will rewrite the passed in slice's string values to not
+// contain multiple side-by-side spaces.
+func stripExcessSpaces(vals []string) {
+	var j, k, l, m, spaces int
+	for i, str := range vals {
+		// Trim trailing spaces
+		for j = len(str) - 1; j >= 0 && str[j] == ' '; j-- {
+		}
+
+		// Trim leading spaces
+		for k = 0; k < j && str[k] == ' '; k++ {
+		}
+		str = str[k : j+1]
+
+		// Strip multiple spaces.
+		j = strings.Index(str, doubleSpace)
+		if j < 0 {
+			vals[i] = str
+			continue
+		}
+
+		buf := []byte(str)
+		for k, m, l = j, j, len(buf); k < l; k++ {
+			if buf[k] == ' ' {
+				if spaces == 0 {
+					// First space.
+					buf[m] = buf[k]
+					m++
+				}
+				spaces++
+			} else {
+				// End of multiple spaces.
+				spaces = 0
+				buf[m] = buf[k]
+				m++
+			}
+		}
+
+		vals[i] = string(buf[:m])
+	}
+}

vendor/github.com/aws/aws-sdk-go/aws/types.go

@@ -0,0 +1,207 @@
+package aws
+
+import (
+	"io"
+	"sync"
+
+	"github.com/aws/aws-sdk-go/internal/sdkio"
+)
+
+// ReadSeekCloser wraps a io.Reader returning a ReaderSeekerCloser. Allows the
+// SDK to accept an io.Reader that is not also an io.Seeker for unsigned
+// streaming payload API operations.
+//
+// A ReadSeekCloser wrapping an nonseekable io.Reader used in an API
+// operation's input will prevent that operation being retried in the case of
+// network errors, and cause operation requests to fail if the operation
+// requires payload signing.
+//
+// Note: If using With S3 PutObject to stream an object upload The SDK's S3
+// Upload manager (s3manager.Uploader) provides support for streaming with the
+// ability to retry network errors.
+func ReadSeekCloser(r io.Reader) ReaderSeekerCloser {
+	return ReaderSeekerCloser{r}
+}
+
+// ReaderSeekerCloser represents a reader that can also delegate io.Seeker and
+// io.Closer interfaces to the underlying object if they are available.
+type ReaderSeekerCloser struct {
+	r io.Reader
+}
+
+// IsReaderSeekable returns if the underlying reader type can be seeked. A
+// io.Reader might not actually be seekable if it is the ReaderSeekerCloser
+// type.
+func IsReaderSeekable(r io.Reader) bool {
+	switch v := r.(type) {
+	case ReaderSeekerCloser:
+		return v.IsSeeker()
+	case *ReaderSeekerCloser:
+		return v.IsSeeker()
+	case io.ReadSeeker:
+		return true
+	default:
+		return false
+	}
+}
+
+// Read reads from the reader up to size of p. The number of bytes read, and
+// error if it occurred will be returned.
+//
+// If the reader is not an io.Reader zero bytes read, and nil error will be
+// returned.
+//
+// Performs the same functionality as io.Reader Read
+func (r ReaderSeekerCloser) Read(p []byte) (int, error) {
+	switch t := r.r.(type) {
+	case io.Reader:
+		return t.Read(p)
+	}
+	return 0, nil
+}
+
+// Seek sets the offset for the next Read to offset, interpreted according to
+// whence: 0 means relative to the origin of the file, 1 means relative to the
+// current offset, and 2 means relative to the end. Seek returns the new offset
+// and an error, if any.
+//
+// If the ReaderSeekerCloser is not an io.Seeker nothing will be done.
+func (r ReaderSeekerCloser) Seek(offset int64, whence int) (int64, error) {
+	switch t := r.r.(type) {
+	case io.Seeker:
+		return t.Seek(offset, whence)
+	}
+	return int64(0), nil
+}
+
+// IsSeeker returns if the underlying reader is also a seeker.
+func (r ReaderSeekerCloser) IsSeeker() bool {
+	_, ok := r.r.(io.Seeker)
+	return ok
+}
+
+// HasLen returns the length of the underlying reader if the value implements
+// the Len() int method.
+func (r ReaderSeekerCloser) HasLen() (int, bool) {
+	type lenner interface {
+		Len() int
+	}
+
+	if lr, ok := r.r.(lenner); ok {
+		return lr.Len(), true
+	}
+
+	return 0, false
+}
+
+// GetLen returns the length of the bytes remaining in the underlying reader.
+// Checks first for Len(), then io.Seeker to determine the size of the
+// underlying reader.
+//
+// Will return -1 if the length cannot be determined.
+func (r ReaderSeekerCloser) GetLen() (int64, error) {
+	if l, ok := r.HasLen(); ok {
+		return int64(l), nil
+	}
+
+	if s, ok := r.r.(io.Seeker); ok {
+		return seekerLen(s)
+	}
+
+	return -1, nil
+}
+
+// SeekerLen attempts to get the number of bytes remaining at the seeker's
+// current position.  Returns the number of bytes remaining or error.
+func SeekerLen(s io.Seeker) (int64, error) {
+	// Determine if the seeker is actually seekable. ReaderSeekerCloser
+	// hides the fact that a io.Readers might not actually be seekable.
+	switch v := s.(type) {
+	case ReaderSeekerCloser:
+		return v.GetLen()
+	case *ReaderSeekerCloser:
+		return v.GetLen()
+	}
+
+	return seekerLen(s)
+}
+
+func seekerLen(s io.Seeker) (int64, error) {
+	curOffset, err := s.Seek(0, sdkio.SeekCurrent)
+	if err != nil {
+		return 0, err
+	}
+
+	endOffset, err := s.Seek(0, sdkio.SeekEnd)
+	if err != nil {
+		return 0, err
+	}
+
+	_, err = s.Seek(curOffset, sdkio.SeekStart)
+	if err != nil {
+		return 0, err
+	}
+
+	return endOffset - curOffset, nil
+}
+
+// Close closes the ReaderSeekerCloser.
+//
+// If the ReaderSeekerCloser is not an io.Closer nothing will be done.
+func (r ReaderSeekerCloser) Close() error {
+	switch t := r.r.(type) {
+	case io.Closer:
+		return t.Close()
+	}
+	return nil
+}
+
+// A WriteAtBuffer provides a in memory buffer supporting the io.WriterAt interface
+// Can be used with the s3manager.Downloader to download content to a buffer
+// in memory. Safe to use concurrently.
+type WriteAtBuffer struct {
+	buf []byte
+	m   sync.Mutex
+
+	// GrowthCoeff defines the growth rate of the internal buffer. By
+	// default, the growth rate is 1, where expanding the internal
+	// buffer will allocate only enough capacity to fit the new expected
+	// length.
+	GrowthCoeff float64
+}
+
+// NewWriteAtBuffer creates a WriteAtBuffer with an internal buffer
+// provided by buf.
+func NewWriteAtBuffer(buf []byte) *WriteAtBuffer {
+	return &WriteAtBuffer{buf: buf}
+}
+
+// WriteAt writes a slice of bytes to a buffer starting at the position provided
+// The number of bytes written will be returned, or error. Can overwrite previous
+// written slices if the write ats overlap.
+func (b *WriteAtBuffer) WriteAt(p []byte, pos int64) (n int, err error) {
+	pLen := len(p)
+	expLen := pos + int64(pLen)
+	b.m.Lock()
+	defer b.m.Unlock()
+	if int64(len(b.buf)) < expLen {
+		if int64(cap(b.buf)) < expLen {
+			if b.GrowthCoeff < 1 {
+				b.GrowthCoeff = 1
+			}
+			newBuf := make([]byte, expLen, int64(b.GrowthCoeff*float64(expLen)))
+			copy(newBuf, b.buf)
+			b.buf = newBuf
+		}
+		b.buf = b.buf[:expLen]
+	}
+	copy(b.buf[pos:], p)
+	return pLen, nil
+}
+
+// Bytes returns a slice of bytes written to the buffer.
+func (b *WriteAtBuffer) Bytes() []byte {
+	b.m.Lock()
+	defer b.m.Unlock()
+	return b.buf
+}

vendor/github.com/aws/aws-sdk-go/aws/url.go

@@ -0,0 +1,12 @@
+// +build go1.8
+
+package aws
+
+import "net/url"
+
+// URLHostname will extract the Hostname without port from the URL value.
+//
+// Wrapper of net/url#URL.Hostname for backwards Go version compatibility.
+func URLHostname(url *url.URL) string {
+	return url.Hostname()
+}

vendor/github.com/aws/aws-sdk-go/aws/url_1_7.go

@@ -0,0 +1,29 @@
+// +build !go1.8
+
+package aws
+
+import (
+	"net/url"
+	"strings"
+)
+
+// URLHostname will extract the Hostname without port from the URL value.
+//
+// Copy of Go 1.8's net/url#URL.Hostname functionality.
+func URLHostname(url *url.URL) string {
+	return stripPort(url.Host)
+
+}
+
+// stripPort is copy of Go 1.8 url#URL.Hostname functionality.
+// https://golang.org/src/net/url/url.go
+func stripPort(hostport string) string {
+	colon := strings.IndexByte(hostport, ':')
+	if colon == -1 {
+		return hostport
+	}
+	if i := strings.IndexByte(hostport, ']'); i != -1 {
+		return strings.TrimPrefix(hostport[:i], "[")
+	}
+	return hostport[:colon]
+}

vendor/github.com/aws/aws-sdk-go/aws/version.go

@@ -0,0 +1,8 @@
+// Package aws provides core functionality for making requests to AWS services.
+package aws
+
+// SDKName is the name of this AWS SDK
+const SDKName = "aws-sdk-go"
+
+// SDKVersion is the version of this SDK
+const SDKVersion = "1.23.9"

vendor/github.com/aws/aws-sdk-go/internal/ini/ast.go

@@ -0,0 +1,120 @@
+package ini
+
+// ASTKind represents different states in the parse table
+// and the type of AST that is being constructed
+type ASTKind int
+
+// ASTKind* is used in the parse table to transition between
+// the different states
+const (
+	ASTKindNone = ASTKind(iota)
+	ASTKindStart
+	ASTKindExpr
+	ASTKindEqualExpr
+	ASTKindStatement
+	ASTKindSkipStatement
+	ASTKindExprStatement
+	ASTKindSectionStatement
+	ASTKindNestedSectionStatement
+	ASTKindCompletedNestedSectionStatement
+	ASTKindCommentStatement
+	ASTKindCompletedSectionStatement
+)
+
+func (k ASTKind) String() string {
+	switch k {
+	case ASTKindNone:
+		return "none"
+	case ASTKindStart:
+		return "start"
+	case ASTKindExpr:
+		return "expr"
+	case ASTKindStatement:
+		return "stmt"
+	case ASTKindSectionStatement:
+		return "section_stmt"
+	case ASTKindExprStatement:
+		return "expr_stmt"
+	case ASTKindCommentStatement:
+		return "comment"
+	case ASTKindNestedSectionStatement:
+		return "nested_section_stmt"
+	case ASTKindCompletedSectionStatement:
+		return "completed_stmt"
+	case ASTKindSkipStatement:
+		return "skip"
+	default:
+		return ""
+	}
+}
+
+// AST interface allows us to determine what kind of node we
+// are on and casting may not need to be necessary.
+//
+// The root is always the first node in Children
+type AST struct {
+	Kind      ASTKind
+	Root      Token
+	RootToken bool
+	Children  []AST
+}
+
+func newAST(kind ASTKind, root AST, children ...AST) AST {
+	return AST{
+		Kind:     kind,
+		Children: append([]AST{root}, children...),
+	}
+}
+
+func newASTWithRootToken(kind ASTKind, root Token, children ...AST) AST {
+	return AST{
+		Kind:      kind,
+		Root:      root,
+		RootToken: true,
+		Children:  children,
+	}
+}
+
+// AppendChild will append to the list of children an AST has.
+func (a *AST) AppendChild(child AST) {
+	a.Children = append(a.Children, child)
+}
+
+// GetRoot will return the root AST which can be the first entry
+// in the children list or a token.
+func (a *AST) GetRoot() AST {
+	if a.RootToken {
+		return *a
+	}
+
+	if len(a.Children) == 0 {
+		return AST{}
+	}
+
+	return a.Children[0]
+}
+
+// GetChildren will return the current AST's list of children
+func (a *AST) GetChildren() []AST {
+	if len(a.Children) == 0 {
+		return []AST{}
+	}
+
+	if a.RootToken {
+		return a.Children
+	}
+
+	return a.Children[1:]
+}
+
+// SetChildren will set and override all children of the AST.
+func (a *AST) SetChildren(children []AST) {
+	if a.RootToken {
+		a.Children = children
+	} else {
+		a.Children = append(a.Children[:1], children...)
+	}
+}
+
+// Start is used to indicate the starting state of the parse table.
+var Start = newAST(ASTKindStart, AST{})

vendor/github.com/aws/aws-sdk-go/internal/ini/comma_token.go

@@ -0,0 +1,11 @@
+package ini
+
+var commaRunes = []rune(",")
+
+func isComma(b rune) bool {
+	return b == ','
+}
+
+func newCommaToken() Token {
+	return newToken(TokenComma, commaRunes, NoneType)
+}

vendor/github.com/aws/aws-sdk-go/internal/ini/comment_token.go

@@ -0,0 +1,35 @@
+package ini
+
+// isComment will return whether or not the next byte(s) is a
+// comment.
+func isComment(b []rune) bool {
+	if len(b) == 0 {
+		return false
+	}
+
+	switch b[0] {
+	case ';':
+		return true
+	case '#':
+		return true
+	}
+
+	return false
+}
+
+// newCommentToken will create a comment token and
+// return how many bytes were read.
+func newCommentToken(b []rune) (Token, int, error) {
+	i := 0
+	for ; i < len(b); i++ {
+		if b[i] == '\n' {
+			break
+		}
+
+		if len(b)-i > 2 && b[i] == '\r' && b[i+1] == '\n' {
+			break
+		}
+	}
+
+	return newToken(TokenComment, b[:i], NoneType), i, nil
+}

vendor/github.com/aws/aws-sdk-go/internal/ini/doc.go

@@ -0,0 +1,29 @@
+// Package ini is an LL(1) parser for configuration files.
+//
+//	Example:
+//	sections, err := ini.OpenFile("/path/to/file")
+//	if err != nil {
+//		panic(err)
+//	}
+//
+//	profile := "foo"
+//	section, ok := sections.GetSection(profile)
+//	if !ok {
+//		fmt.Printf("section %q could not be found", profile)
+//	}
+//
+// Below is the BNF that describes this parser
+//	Grammar:
+//	stmt -> value stmt'
+//	stmt' -> epsilon | op stmt
+//	value -> number | string | boolean | quoted_string
+//
+//	section -> [ section'
+//	section' -> value section_close
+//	section_close -> ]
+//
+//	SkipState will skip (NL WS)+
+//
+//	comment -> # comment' | ; comment'
+//	comment' -> epsilon | value
+package ini

vendor/github.com/aws/aws-sdk-go/internal/ini/empty_token.go

@@ -0,0 +1,4 @@
+package ini
+
+// emptyToken is used to satisfy the Token interface
+var emptyToken = newToken(TokenNone, []rune{}, NoneType)

vendor/github.com/aws/aws-sdk-go/internal/ini/expression.go

@@ -0,0 +1,24 @@
+package ini
+
+// newExpression will return an expression AST.
+// Expr represents an expression
+//
+//	grammar:
+//	expr -> string | number
+func newExpression(tok Token) AST {
+	return newASTWithRootToken(ASTKindExpr, tok)
+}
+
+func newEqualExpr(left AST, tok Token) AST {
+	return newASTWithRootToken(ASTKindEqualExpr, tok, left)
+}
+
+// EqualExprKey will return a LHS value in the equal expr
+func EqualExprKey(ast AST) string {
+	children := ast.GetChildren()
+	if len(children) == 0 || ast.Kind != ASTKindEqualExpr {
+		return ""
+	}
+
+	return string(children[0].Root.Raw())
+}