João Oliveirinha
3 months ago
37 changed files with 906 additions and 1147 deletions
@ -0,0 +1,202 @@
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Apache License |
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@ -0,0 +1,5 @@
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CoreOS Project |
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@ -0,0 +1,126 @@
|
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package jose |
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|
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import ( |
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"encoding/json" |
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"fmt" |
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"math" |
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"time" |
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) |
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|
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type Claims map[string]interface{} |
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|
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func (c Claims) Add(name string, value interface{}) { |
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c[name] = value |
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} |
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|
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func (c Claims) StringClaim(name string) (string, bool, error) { |
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cl, ok := c[name] |
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if !ok { |
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return "", false, nil |
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} |
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|
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v, ok := cl.(string) |
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if !ok { |
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return "", false, fmt.Errorf("unable to parse claim as string: %v", name) |
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} |
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|
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return v, true, nil |
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} |
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|
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func (c Claims) StringsClaim(name string) ([]string, bool, error) { |
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cl, ok := c[name] |
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if !ok { |
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return nil, false, nil |
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} |
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|
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if v, ok := cl.([]string); ok { |
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return v, true, nil |
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} |
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|
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// When unmarshaled, []string will become []interface{}.
|
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if v, ok := cl.([]interface{}); ok { |
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var ret []string |
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for _, vv := range v { |
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str, ok := vv.(string) |
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if !ok { |
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return nil, false, fmt.Errorf("unable to parse claim as string array: %v", name) |
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} |
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ret = append(ret, str) |
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} |
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return ret, true, nil |
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} |
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|
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return nil, false, fmt.Errorf("unable to parse claim as string array: %v", name) |
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} |
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|
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func (c Claims) Int64Claim(name string) (int64, bool, error) { |
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cl, ok := c[name] |
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if !ok { |
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return 0, false, nil |
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} |
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|
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v, ok := cl.(int64) |
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if !ok { |
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vf, ok := cl.(float64) |
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if !ok { |
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return 0, false, fmt.Errorf("unable to parse claim as int64: %v", name) |
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} |
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v = int64(vf) |
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} |
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|
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return v, true, nil |
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} |
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|
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func (c Claims) Float64Claim(name string) (float64, bool, error) { |
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cl, ok := c[name] |
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if !ok { |
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return 0, false, nil |
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} |
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|
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v, ok := cl.(float64) |
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if !ok { |
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vi, ok := cl.(int64) |
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if !ok { |
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return 0, false, fmt.Errorf("unable to parse claim as float64: %v", name) |
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} |
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v = float64(vi) |
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} |
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|
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return v, true, nil |
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} |
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|
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func (c Claims) TimeClaim(name string) (time.Time, bool, error) { |
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v, ok, err := c.Float64Claim(name) |
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if !ok || err != nil { |
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return time.Time{}, ok, err |
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} |
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|
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s := math.Trunc(v) |
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ns := (v - s) * math.Pow(10, 9) |
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return time.Unix(int64(s), int64(ns)).UTC(), true, nil |
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} |
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|
||||
func decodeClaims(payload []byte) (Claims, error) { |
||||
var c Claims |
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if err := json.Unmarshal(payload, &c); err != nil { |
||||
return nil, fmt.Errorf("malformed JWT claims, unable to decode: %v", err) |
||||
} |
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return c, nil |
||||
} |
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|
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func marshalClaims(c Claims) ([]byte, error) { |
||||
b, err := json.Marshal(c) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
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return b, nil |
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} |
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|
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func encodeClaims(c Claims) (string, error) { |
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b, err := marshalClaims(c) |
||||
if err != nil { |
||||
return "", err |
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} |
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|
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return encodeSegment(b), nil |
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} |
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@ -0,0 +1,2 @@
|
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// Package jose is DEPRECATED. Use gopkg.in/square/go-jose.v2 instead.
|
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package jose |
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@ -0,0 +1,112 @@
|
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package jose |
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|
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import ( |
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"encoding/base64" |
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"encoding/json" |
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"fmt" |
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"strings" |
||||
) |
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|
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const ( |
||||
HeaderMediaType = "typ" |
||||
HeaderKeyAlgorithm = "alg" |
||||
HeaderKeyID = "kid" |
||||
) |
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|
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const ( |
||||
// Encryption Algorithm Header Parameter Values for JWS
|
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// See: https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40#page-6
|
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AlgHS256 = "HS256" |
||||
AlgHS384 = "HS384" |
||||
AlgHS512 = "HS512" |
||||
AlgRS256 = "RS256" |
||||
AlgRS384 = "RS384" |
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AlgRS512 = "RS512" |
||||
AlgES256 = "ES256" |
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AlgES384 = "ES384" |
||||
AlgES512 = "ES512" |
||||
AlgPS256 = "PS256" |
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AlgPS384 = "PS384" |
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AlgPS512 = "PS512" |
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AlgNone = "none" |
||||
) |
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|
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const ( |
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// Algorithm Header Parameter Values for JWE
|
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// See: https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40#section-4.1
|
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AlgRSA15 = "RSA1_5" |
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AlgRSAOAEP = "RSA-OAEP" |
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AlgRSAOAEP256 = "RSA-OAEP-256" |
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AlgA128KW = "A128KW" |
||||
AlgA192KW = "A192KW" |
||||
AlgA256KW = "A256KW" |
||||
AlgDir = "dir" |
||||
AlgECDHES = "ECDH-ES" |
||||
AlgECDHESA128KW = "ECDH-ES+A128KW" |
||||
AlgECDHESA192KW = "ECDH-ES+A192KW" |
||||
AlgECDHESA256KW = "ECDH-ES+A256KW" |
||||
AlgA128GCMKW = "A128GCMKW" |
||||
AlgA192GCMKW = "A192GCMKW" |
||||
AlgA256GCMKW = "A256GCMKW" |
||||
AlgPBES2HS256A128KW = "PBES2-HS256+A128KW" |
||||
AlgPBES2HS384A192KW = "PBES2-HS384+A192KW" |
||||
AlgPBES2HS512A256KW = "PBES2-HS512+A256KW" |
||||
) |
||||
|
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const ( |
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// Encryption Algorithm Header Parameter Values for JWE
|
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// See: https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40#page-22
|
||||
EncA128CBCHS256 = "A128CBC-HS256" |
||||
EncA128CBCHS384 = "A128CBC-HS384" |
||||
EncA256CBCHS512 = "A256CBC-HS512" |
||||
EncA128GCM = "A128GCM" |
||||
EncA192GCM = "A192GCM" |
||||
EncA256GCM = "A256GCM" |
||||
) |
||||
|
||||
type JOSEHeader map[string]string |
||||
|
||||
func (j JOSEHeader) Validate() error { |
||||
if _, exists := j[HeaderKeyAlgorithm]; !exists { |
||||
return fmt.Errorf("header missing %q parameter", HeaderKeyAlgorithm) |
||||
} |
||||
|
||||
return nil |
||||
} |
||||
|
||||
func decodeHeader(seg string) (JOSEHeader, error) { |
||||
b, err := decodeSegment(seg) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
|
||||
var h JOSEHeader |
||||
err = json.Unmarshal(b, &h) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
|
||||
return h, nil |
||||
} |
||||
|
||||
func encodeHeader(h JOSEHeader) (string, error) { |
||||
b, err := json.Marshal(h) |
||||
if err != nil { |
||||
return "", err |
||||
} |
||||
|
||||
return encodeSegment(b), nil |
||||
} |
||||
|
||||
// Decode JWT specific base64url encoding with padding stripped
|
||||
func decodeSegment(seg string) ([]byte, error) { |
||||
if l := len(seg) % 4; l != 0 { |
||||
seg += strings.Repeat("=", 4-l) |
||||
} |
||||
return base64.URLEncoding.DecodeString(seg) |
||||
} |
||||
|
||||
// Encode JWT specific base64url encoding with padding stripped
|
||||
func encodeSegment(seg []byte) string { |
||||
return strings.TrimRight(base64.URLEncoding.EncodeToString(seg), "=") |
||||
} |
||||
@ -0,0 +1,135 @@
|
||||
package jose |
||||
|
||||
import ( |
||||
"bytes" |
||||
"encoding/base64" |
||||
"encoding/binary" |
||||
"encoding/json" |
||||
"math/big" |
||||
"strings" |
||||
) |
||||
|
||||
// JSON Web Key
|
||||
// https://tools.ietf.org/html/draft-ietf-jose-json-web-key-36#page-5
|
||||
type JWK struct { |
||||
ID string |
||||
Type string |
||||
Alg string |
||||
Use string |
||||
Exponent int |
||||
Modulus *big.Int |
||||
Secret []byte |
||||
} |
||||
|
||||
type jwkJSON struct { |
||||
ID string `json:"kid"` |
||||
Type string `json:"kty"` |
||||
Alg string `json:"alg"` |
||||
Use string `json:"use"` |
||||
Exponent string `json:"e"` |
||||
Modulus string `json:"n"` |
||||
} |
||||
|
||||
func (j *JWK) MarshalJSON() ([]byte, error) { |
||||
t := jwkJSON{ |
||||
ID: j.ID, |
||||
Type: j.Type, |
||||
Alg: j.Alg, |
||||
Use: j.Use, |
||||
Exponent: encodeExponent(j.Exponent), |
||||
Modulus: encodeModulus(j.Modulus), |
||||
} |
||||
|
||||
return json.Marshal(&t) |
||||
} |
||||
|
||||
func (j *JWK) UnmarshalJSON(data []byte) error { |
||||
var t jwkJSON |
||||
err := json.Unmarshal(data, &t) |
||||
if err != nil { |
||||
return err |
||||
} |
||||
|
||||
e, err := decodeExponent(t.Exponent) |
||||
if err != nil { |
||||
return err |
||||
} |
||||
|
||||
n, err := decodeModulus(t.Modulus) |
||||
if err != nil { |
||||
return err |
||||
} |
||||
|
||||
j.ID = t.ID |
||||
j.Type = t.Type |
||||
j.Alg = t.Alg |
||||
j.Use = t.Use |
||||
j.Exponent = e |
||||
j.Modulus = n |
||||
|
||||
return nil |
||||
} |
||||
|
||||
type JWKSet struct { |
||||
Keys []JWK `json:"keys"` |
||||
} |
||||
|
||||
func decodeExponent(e string) (int, error) { |
||||
decE, err := decodeBase64URLPaddingOptional(e) |
||||
if err != nil { |
||||
return 0, err |
||||
} |
||||
var eBytes []byte |
||||
if len(decE) < 8 { |
||||
eBytes = make([]byte, 8-len(decE), 8) |
||||
eBytes = append(eBytes, decE...) |
||||
} else { |
||||
eBytes = decE |
||||
} |
||||
eReader := bytes.NewReader(eBytes) |
||||
var E uint64 |
||||
err = binary.Read(eReader, binary.BigEndian, &E) |
||||
if err != nil { |
||||
return 0, err |
||||
} |
||||
return int(E), nil |
||||
} |
||||
|
||||
func encodeExponent(e int) string { |
||||
b := make([]byte, 8) |
||||
binary.BigEndian.PutUint64(b, uint64(e)) |
||||
var idx int |
||||
for ; idx < 8; idx++ { |
||||
if b[idx] != 0x0 { |
||||
break |
||||
} |
||||
} |
||||
return base64.RawURLEncoding.EncodeToString(b[idx:]) |
||||
} |
||||
|
||||
// Turns a URL encoded modulus of a key into a big int.
|
||||
func decodeModulus(n string) (*big.Int, error) { |
||||
decN, err := decodeBase64URLPaddingOptional(n) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
N := big.NewInt(0) |
||||
N.SetBytes(decN) |
||||
return N, nil |
||||
} |
||||
|
||||
func encodeModulus(n *big.Int) string { |
||||
return base64.RawURLEncoding.EncodeToString(n.Bytes()) |
||||
} |
||||
|
||||
// decodeBase64URLPaddingOptional decodes Base64 whether there is padding or not.
|
||||
// The stdlib version currently doesn't handle this.
|
||||
// We can get rid of this is if this bug:
|
||||
// https://github.com/golang/go/issues/4237
|
||||
// ever closes.
|
||||
func decodeBase64URLPaddingOptional(e string) ([]byte, error) { |
||||
if m := len(e) % 4; m != 0 { |
||||
e += strings.Repeat("=", 4-m) |
||||
} |
||||
return base64.URLEncoding.DecodeString(e) |
||||
} |
||||
@ -0,0 +1,51 @@
|
||||
package jose |
||||
|
||||
import ( |
||||
"fmt" |
||||
"strings" |
||||
) |
||||
|
||||
type JWS struct { |
||||
RawHeader string |
||||
Header JOSEHeader |
||||
RawPayload string |
||||
Payload []byte |
||||
Signature []byte |
||||
} |
||||
|
||||
// Given a raw encoded JWS token parses it and verifies the structure.
|
||||
func ParseJWS(raw string) (JWS, error) { |
||||
parts := strings.Split(raw, ".") |
||||
if len(parts) != 3 { |
||||
return JWS{}, fmt.Errorf("malformed JWS, only %d segments", len(parts)) |
||||
} |
||||
|
||||
rawSig := parts[2] |
||||
jws := JWS{ |
||||
RawHeader: parts[0], |
||||
RawPayload: parts[1], |
||||
} |
||||
|
||||
header, err := decodeHeader(jws.RawHeader) |
||||
if err != nil { |
||||
return JWS{}, fmt.Errorf("malformed JWS, unable to decode header, %s", err) |
||||
} |
||||
if err = header.Validate(); err != nil { |
||||
return JWS{}, fmt.Errorf("malformed JWS, %s", err) |
||||
} |
||||
jws.Header = header |
||||
|
||||
payload, err := decodeSegment(jws.RawPayload) |
||||
if err != nil { |
||||
return JWS{}, fmt.Errorf("malformed JWS, unable to decode payload: %s", err) |
||||
} |
||||
jws.Payload = payload |
||||
|
||||
sig, err := decodeSegment(rawSig) |
||||
if err != nil { |
||||
return JWS{}, fmt.Errorf("malformed JWS, unable to decode signature: %s", err) |
||||
} |
||||
jws.Signature = sig |
||||
|
||||
return jws, nil |
||||
} |
||||
@ -0,0 +1,82 @@
|
||||
package jose |
||||
|
||||
import "strings" |
||||
|
||||
type JWT JWS |
||||
|
||||
func ParseJWT(token string) (jwt JWT, err error) { |
||||
jws, err := ParseJWS(token) |
||||
if err != nil { |
||||
return |
||||
} |
||||
|
||||
return JWT(jws), nil |
||||
} |
||||
|
||||
func NewJWT(header JOSEHeader, claims Claims) (jwt JWT, err error) { |
||||
jwt = JWT{} |
||||
|
||||
jwt.Header = header |
||||
jwt.Header[HeaderMediaType] = "JWT" |
||||
|
||||
claimBytes, err := marshalClaims(claims) |
||||
if err != nil { |
||||
return |
||||
} |
||||
jwt.Payload = claimBytes |
||||
|
||||
eh, err := encodeHeader(header) |
||||
if err != nil { |
||||
return |
||||
} |
||||
jwt.RawHeader = eh |
||||
|
||||
ec, err := encodeClaims(claims) |
||||
if err != nil { |
||||
return |
||||
} |
||||
jwt.RawPayload = ec |
||||
|
||||
return |
||||
} |
||||
|
||||
func (j *JWT) KeyID() (string, bool) { |
||||
kID, ok := j.Header[HeaderKeyID] |
||||
return kID, ok |
||||
} |
||||
|
||||
func (j *JWT) Claims() (Claims, error) { |
||||
return decodeClaims(j.Payload) |
||||
} |
||||
|
||||
// Encoded data part of the token which may be signed.
|
||||
func (j *JWT) Data() string { |
||||
return strings.Join([]string{j.RawHeader, j.RawPayload}, ".") |
||||
} |
||||
|
||||
// Full encoded JWT token string in format: header.claims.signature
|
||||
func (j *JWT) Encode() string { |
||||
d := j.Data() |
||||
s := encodeSegment(j.Signature) |
||||
return strings.Join([]string{d, s}, ".") |
||||
} |
||||
|
||||
func NewSignedJWT(claims Claims, s Signer) (*JWT, error) { |
||||
header := JOSEHeader{ |
||||
HeaderKeyAlgorithm: s.Alg(), |
||||
HeaderKeyID: s.ID(), |
||||
} |
||||
|
||||
jwt, err := NewJWT(header, claims) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
|
||||
sig, err := s.Sign([]byte(jwt.Data())) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
jwt.Signature = sig |
||||
|
||||
return &jwt, nil |
||||
} |
||||
@ -0,0 +1,24 @@
|
||||
package jose |
||||
|
||||
import ( |
||||
"fmt" |
||||
) |
||||
|
||||
type Verifier interface { |
||||
ID() string |
||||
Alg() string |
||||
Verify(sig []byte, data []byte) error |
||||
} |
||||
|
||||
type Signer interface { |
||||
Verifier |
||||
Sign(data []byte) (sig []byte, err error) |
||||
} |
||||
|
||||
func NewVerifier(jwk JWK) (Verifier, error) { |
||||
if jwk.Type != "RSA" { |
||||
return nil, fmt.Errorf("unsupported key type %q", jwk.Type) |
||||
} |
||||
|
||||
return NewVerifierRSA(jwk) |
||||
} |
||||
@ -0,0 +1,67 @@
|
||||
package jose |
||||
|
||||
import ( |
||||
"crypto" |
||||
"crypto/rand" |
||||
"crypto/rsa" |
||||
"fmt" |
||||
) |
||||
|
||||
type VerifierRSA struct { |
||||
KeyID string |
||||
Hash crypto.Hash |
||||
PublicKey rsa.PublicKey |
||||
} |
||||
|
||||
type SignerRSA struct { |
||||
PrivateKey rsa.PrivateKey |
||||
VerifierRSA |
||||
} |
||||
|
||||
func NewVerifierRSA(jwk JWK) (*VerifierRSA, error) { |
||||
if jwk.Alg != "" && jwk.Alg != "RS256" { |
||||
return nil, fmt.Errorf("unsupported key algorithm %q", jwk.Alg) |
||||
} |
||||
|
||||
v := VerifierRSA{ |
||||
KeyID: jwk.ID, |
||||
PublicKey: rsa.PublicKey{ |
||||
N: jwk.Modulus, |
||||
E: jwk.Exponent, |
||||
}, |
||||
Hash: crypto.SHA256, |
||||
} |
||||
|
||||
return &v, nil |
||||
} |
||||
|
||||
func NewSignerRSA(kid string, key rsa.PrivateKey) *SignerRSA { |
||||
return &SignerRSA{ |
||||
PrivateKey: key, |
||||
VerifierRSA: VerifierRSA{ |
||||
KeyID: kid, |
||||
PublicKey: key.PublicKey, |
||||
Hash: crypto.SHA256, |
||||
}, |
||||
} |
||||
} |
||||
|
||||
func (v *VerifierRSA) ID() string { |
||||
return v.KeyID |
||||
} |
||||
|
||||
func (v *VerifierRSA) Alg() string { |
||||
return "RS256" |
||||
} |
||||
|
||||
func (v *VerifierRSA) Verify(sig []byte, data []byte) error { |
||||
h := v.Hash.New() |
||||
h.Write(data) |
||||
return rsa.VerifyPKCS1v15(&v.PublicKey, v.Hash, h.Sum(nil), sig) |
||||
} |
||||
|
||||
func (s *SignerRSA) Sign(data []byte) ([]byte, error) { |
||||
h := s.Hash.New() |
||||
h.Write(data) |
||||
return rsa.SignPKCS1v15(rand.Reader, &s.PrivateKey, s.Hash, h.Sum(nil)) |
||||
} |
||||