88 lines
2.3 KiB
Go
88 lines
2.3 KiB
Go
package token
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import (
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
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"github.com/cloudflare/cloudflared/cmd/cloudflared/transfer"
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"github.com/cloudflare/cloudflared/log"
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"github.com/coreos/go-oidc/jose"
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"github.com/coreos/go-oidc/oidc"
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homedir "github.com/mitchellh/go-homedir"
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)
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var logger = log.CreateLogger()
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// FetchToken will either load a stored token or generate a new one
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func FetchToken(appURL *url.URL) (string, error) {
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if token, err := GetTokenIfExists(appURL); token != "" && err == nil {
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return token, nil
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}
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path, err := generateFilePathForTokenURL(appURL)
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if err != nil {
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return "", err
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}
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// this weird parameter is the resource name (token) and the key/value
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// we want to send to the transfer service. the key is token and the value
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// is blank (basically just the id generated in the transfer service)
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const resourceName, key, value = "token", "token", ""
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token, err := transfer.Run(appURL, resourceName, key, value, path, true)
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if err != nil {
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return "", err
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}
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return string(token), nil
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}
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// GetTokenIfExists will return the token from local storage if it exists
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func GetTokenIfExists(url *url.URL) (string, error) {
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path, err := generateFilePathForTokenURL(url)
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if err != nil {
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return "", err
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}
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content, err := ioutil.ReadFile(path)
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if err != nil {
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return "", err
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}
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token, err := jose.ParseJWT(string(content))
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if err != nil {
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return "", err
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}
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claims, err := token.Claims()
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if err != nil {
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return "", err
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}
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ident, err := oidc.IdentityFromClaims(claims)
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if err == nil && ident.ExpiresAt.After(time.Now()) {
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return token.Encode(), nil
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}
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return "", err
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}
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// generateFilePathForTokenURL will return a filepath for given access application url
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func generateFilePathForTokenURL(url *url.URL) (string, error) {
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configPath, err := homedir.Expand(config.DefaultConfigDirs[0])
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if err != nil {
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return "", err
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}
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ok, err := config.FileExists(configPath)
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if !ok && err == nil {
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// create config directory if doesn't already exist
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err = os.Mkdir(configPath, 0700)
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}
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if err != nil {
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return "", err
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}
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name := strings.Replace(fmt.Sprintf("%s%s-token", url.Hostname(), url.EscapedPath()), "/", "-", -1)
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return filepath.Join(configPath, name), nil
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}
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