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Update Go version and package dependencies

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This commit is contained in:
Eddy Filip
2023-03-24 17:58:25 +01:00
parent fe930fef05
commit 63dcaac407
960 changed files with 74779 additions and 35525 deletions
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94
vendor/golang.org/x/oauth2/authhandler/authhandler.go generated vendored
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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package authhandler implements a TokenSource to support
// "three-legged OAuth 2.0" via a custom AuthorizationHandler.
package authhandler
import (
"context"
"errors"
"golang.org/x/oauth2"
)
const (
// Parameter keys for AuthCodeURL method to support PKCE.
codeChallengeKey = "code_challenge"
codeChallengeMethodKey = "code_challenge_method"
// Parameter key for Exchange method to support PKCE.
codeVerifierKey = "code_verifier"
)
// PKCEParams holds parameters to support PKCE.
type PKCEParams struct {
Challenge string // The unpadded, base64-url-encoded string of the encrypted code verifier.
ChallengeMethod string // The encryption method (ex. S256).
Verifier string // The original, non-encrypted secret.
}
// AuthorizationHandler is a 3-legged-OAuth helper that prompts
// the user for OAuth consent at the specified auth code URL
// and returns an auth code and state upon approval.
type AuthorizationHandler func(authCodeURL string) (code string, state string, err error)
// TokenSourceWithPKCE is an enhanced version of TokenSource with PKCE support.
//
// The pkce parameter supports PKCE flow, which uses code challenge and code verifier
// to prevent CSRF attacks. A unique code challenge and code verifier should be generated
// by the caller at runtime. See https://www.oauth.com/oauth2-servers/pkce/ for more info.
func TokenSourceWithPKCE(ctx context.Context, config *oauth2.Config, state string, authHandler AuthorizationHandler, pkce *PKCEParams) oauth2.TokenSource {
return oauth2.ReuseTokenSource(nil, authHandlerSource{config: config, ctx: ctx, authHandler: authHandler, state: state, pkce: pkce})
}
// TokenSource returns an oauth2.TokenSource that fetches access tokens
// using 3-legged-OAuth flow.
//
// The provided context.Context is used for oauth2 Exchange operation.
//
// The provided oauth2.Config should be a full configuration containing AuthURL,
// TokenURL, and Scope.
//
// An environment-specific AuthorizationHandler is used to obtain user consent.
//
// Per the OAuth protocol, a unique "state" string should be specified here.
// This token source will verify that the "state" is identical in the request
// and response before exchanging the auth code for OAuth token to prevent CSRF
// attacks.
func TokenSource(ctx context.Context, config *oauth2.Config, state string, authHandler AuthorizationHandler) oauth2.TokenSource {
return TokenSourceWithPKCE(ctx, config, state, authHandler, nil)
}
type authHandlerSource struct {
ctx context.Context
config *oauth2.Config
authHandler AuthorizationHandler
state string
pkce *PKCEParams
}
func (source authHandlerSource) Token() (*oauth2.Token, error) {
// Step 1: Obtain auth code.
var authCodeUrlOptions []oauth2.AuthCodeOption
if source.pkce != nil && source.pkce.Challenge != "" && source.pkce.ChallengeMethod != "" {
authCodeUrlOptions = []oauth2.AuthCodeOption{oauth2.SetAuthURLParam(codeChallengeKey, source.pkce.Challenge),
oauth2.SetAuthURLParam(codeChallengeMethodKey, source.pkce.ChallengeMethod)}
}
url := source.config.AuthCodeURL(source.state, authCodeUrlOptions...)
code, state, err := source.authHandler(url)
if err != nil {
return nil, err
}
if state != source.state {
return nil, errors.New("state mismatch in 3-legged-OAuth flow")
}
// Step 2: Exchange auth code for access token.
var exchangeOptions []oauth2.AuthCodeOption
if source.pkce != nil && source.pkce.Verifier != "" {
exchangeOptions = []oauth2.AuthCodeOption{oauth2.SetAuthURLParam(codeVerifierKey, source.pkce.Verifier)}
}
return source.config.Exchange(source.ctx, code, exchangeOptions...)
}

38
vendor/golang.org/x/oauth2/google/appengine.go generated vendored
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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"context"
"time"
"golang.org/x/oauth2"
)
// Set at init time by appengine_gen1.go. If nil, we're not on App Engine standard first generation (<= Go 1.9) or App Engine flexible.
var appengineTokenFunc func(c context.Context, scopes ...string) (token string, expiry time.Time, err error)
// Set at init time by appengine_gen1.go. If nil, we're not on App Engine standard first generation (<= Go 1.9) or App Engine flexible.
var appengineAppIDFunc func(c context.Context) string
// AppEngineTokenSource returns a token source that fetches tokens from either
// the current application's service account or from the metadata server,
// depending on the App Engine environment. See below for environment-specific
// details. If you are implementing a 3-legged OAuth 2.0 flow on App Engine that
// involves user accounts, see oauth2.Config instead.
//
// First generation App Engine runtimes (<= Go 1.9):
// AppEngineTokenSource returns a token source that fetches tokens issued to the
// current App Engine application's service account. The provided context must have
// come from appengine.NewContext.
//
// Second generation App Engine runtimes (>= Go 1.11) and App Engine flexible:
// AppEngineTokenSource is DEPRECATED on second generation runtimes and on the
// flexible environment. It delegates to ComputeTokenSource, and the provided
// context and scopes are not used. Please use DefaultTokenSource (or ComputeTokenSource,
// which DefaultTokenSource will use in this case) instead.
func AppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
return appEngineTokenSource(ctx, scope...)
}

78
vendor/golang.org/x/oauth2/google/appengine_gen1.go generated vendored
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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build appengine
// +build appengine
// This file applies to App Engine first generation runtimes (<= Go 1.9).
package google
import (
"context"
"sort"
"strings"
"sync"
"golang.org/x/oauth2"
"google.golang.org/appengine"
)
func init() {
appengineTokenFunc = appengine.AccessToken
appengineAppIDFunc = appengine.AppID
}
// See comment on AppEngineTokenSource in appengine.go.
func appEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
scopes := append([]string{}, scope...)
sort.Strings(scopes)
return &gaeTokenSource{
ctx: ctx,
scopes: scopes,
key: strings.Join(scopes, " "),
}
}
// aeTokens helps the fetched tokens to be reused until their expiration.
var (
aeTokensMu sync.Mutex
aeTokens = make(map[string]*tokenLock) // key is space-separated scopes
)
type tokenLock struct {
mu sync.Mutex // guards t; held while fetching or updating t
t *oauth2.Token
}
type gaeTokenSource struct {
ctx context.Context
scopes []string
key string // to aeTokens map; space-separated scopes
}
func (ts *gaeTokenSource) Token() (*oauth2.Token, error) {
aeTokensMu.Lock()
tok, ok := aeTokens[ts.key]
if !ok {
tok = &tokenLock{}
aeTokens[ts.key] = tok
}
aeTokensMu.Unlock()
tok.mu.Lock()
defer tok.mu.Unlock()
if tok.t.Valid() {
return tok.t, nil
}
access, exp, err := appengineTokenFunc(ts.ctx, ts.scopes...)
if err != nil {
return nil, err
}
tok.t = &oauth2.Token{
AccessToken: access,
Expiry: exp,
}
return tok.t, nil
}

28
vendor/golang.org/x/oauth2/google/appengine_gen2_flex.go generated vendored
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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !appengine
// +build !appengine
// This file applies to App Engine second generation runtimes (>= Go 1.11) and App Engine flexible.
package google
import (
"context"
"log"
"sync"
"golang.org/x/oauth2"
)
var logOnce sync.Once // only spam about deprecation once
// See comment on AppEngineTokenSource in appengine.go.
func appEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
logOnce.Do(func() {
log.Print("google: AppEngineTokenSource is deprecated on App Engine standard second generation runtimes (>= Go 1.11) and App Engine flexible. Please use DefaultTokenSource or ComputeTokenSource.")
})
return ComputeTokenSource("")
}

225
vendor/golang.org/x/oauth2/google/default.go generated vendored
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"runtime"
"cloud.google.com/go/compute/metadata"
"golang.org/x/oauth2"
"golang.org/x/oauth2/authhandler"
)
// Credentials holds Google credentials, including "Application Default Credentials".
// For more details, see:
// https://developers.google.com/accounts/docs/application-default-credentials
// Credentials from external accounts (workload identity federation) are used to
// identify a particular application from an on-prem or non-Google Cloud platform
// including Amazon Web Services (AWS), Microsoft Azure or any identity provider
// that supports OpenID Connect (OIDC).
type Credentials struct {
ProjectID string // may be empty
TokenSource oauth2.TokenSource
// JSON contains the raw bytes from a JSON credentials file.
// This field may be nil if authentication is provided by the
// environment and not with a credentials file, e.g. when code is
// running on Google Cloud Platform.
JSON []byte
}
// DefaultCredentials is the old name of Credentials.
//
// Deprecated: use Credentials instead.
type DefaultCredentials = Credentials
// CredentialsParams holds user supplied parameters that are used together
// with a credentials file for building a Credentials object.
type CredentialsParams struct {
// Scopes is the list OAuth scopes. Required.
// Example: https://www.googleapis.com/auth/cloud-platform
Scopes []string
// Subject is the user email used for domain wide delegation (see
// https://developers.google.com/identity/protocols/oauth2/service-account#delegatingauthority).
// Optional.
Subject string
// AuthHandler is the AuthorizationHandler used for 3-legged OAuth flow. Required for 3LO flow.
AuthHandler authhandler.AuthorizationHandler
// State is a unique string used with AuthHandler. Required for 3LO flow.
State string
// PKCE is used to support PKCE flow. Optional for 3LO flow.
PKCE *authhandler.PKCEParams
}
func (params CredentialsParams) deepCopy() CredentialsParams {
paramsCopy := params
paramsCopy.Scopes = make([]string, len(params.Scopes))
copy(paramsCopy.Scopes, params.Scopes)
return paramsCopy
}
// DefaultClient returns an HTTP Client that uses the
// DefaultTokenSource to obtain authentication credentials.
func DefaultClient(ctx context.Context, scope ...string) (*http.Client, error) {
ts, err := DefaultTokenSource(ctx, scope...)
if err != nil {
return nil, err
}
return oauth2.NewClient(ctx, ts), nil
}
// DefaultTokenSource returns the token source for
// "Application Default Credentials".
// It is a shortcut for FindDefaultCredentials(ctx, scope).TokenSource.
func DefaultTokenSource(ctx context.Context, scope ...string) (oauth2.TokenSource, error) {
creds, err := FindDefaultCredentials(ctx, scope...)
if err != nil {
return nil, err
}
return creds.TokenSource, nil
}
// FindDefaultCredentialsWithParams searches for "Application Default Credentials".
//
// It looks for credentials in the following places,
// preferring the first location found:
//
// 1. A JSON file whose path is specified by the
// GOOGLE_APPLICATION_CREDENTIALS environment variable.
// For workload identity federation, refer to
// https://cloud.google.com/iam/docs/how-to#using-workload-identity-federation on
// how to generate the JSON configuration file for on-prem/non-Google cloud
// platforms.
// 2. A JSON file in a location known to the gcloud command-line tool.
// On Windows, this is %APPDATA%/gcloud/application_default_credentials.json.
// On other systems, $HOME/.config/gcloud/application_default_credentials.json.
// 3. On Google App Engine standard first generation runtimes (<= Go 1.9) it uses
// the appengine.AccessToken function.
// 4. On Google Compute Engine, Google App Engine standard second generation runtimes
// (>= Go 1.11), and Google App Engine flexible environment, it fetches
// credentials from the metadata server.
func FindDefaultCredentialsWithParams(ctx context.Context, params CredentialsParams) (*Credentials, error) {
// Make defensive copy of the slices in params.
params = params.deepCopy()
// First, try the environment variable.
const envVar = "GOOGLE_APPLICATION_CREDENTIALS"
if filename := os.Getenv(envVar); filename != "" {
creds, err := readCredentialsFile(ctx, filename, params)
if err != nil {
return nil, fmt.Errorf("google: error getting credentials using %v environment variable: %v", envVar, err)
}
return creds, nil
}
// Second, try a well-known file.
filename := wellKnownFile()
if creds, err := readCredentialsFile(ctx, filename, params); err == nil {
return creds, nil
} else if !os.IsNotExist(err) {
return nil, fmt.Errorf("google: error getting credentials using well-known file (%v): %v", filename, err)
}
// Third, if we're on a Google App Engine standard first generation runtime (<= Go 1.9)
// use those credentials. App Engine standard second generation runtimes (>= Go 1.11)
// and App Engine flexible use ComputeTokenSource and the metadata server.
if appengineTokenFunc != nil {
return &DefaultCredentials{
ProjectID: appengineAppIDFunc(ctx),
TokenSource: AppEngineTokenSource(ctx, params.Scopes...),
}, nil
}
// Fourth, if we're on Google Compute Engine, an App Engine standard second generation runtime,
// or App Engine flexible, use the metadata server.
if metadata.OnGCE() {
id, _ := metadata.ProjectID()
return &DefaultCredentials{
ProjectID: id,
TokenSource: ComputeTokenSource("", params.Scopes...),
}, nil
}
// None are found; return helpful error.
const url = "https://developers.google.com/accounts/docs/application-default-credentials"
return nil, fmt.Errorf("google: could not find default credentials. See %v for more information.", url)
}
// FindDefaultCredentials invokes FindDefaultCredentialsWithParams with the specified scopes.
func FindDefaultCredentials(ctx context.Context, scopes ...string) (*Credentials, error) {
var params CredentialsParams
params.Scopes = scopes
return FindDefaultCredentialsWithParams(ctx, params)
}
// CredentialsFromJSONWithParams obtains Google credentials from a JSON value. The JSON can
// represent either a Google Developers Console client_credentials.json file (as in ConfigFromJSON),
// a Google Developers service account key file, a gcloud user credentials file (a.k.a. refresh
// token JSON), or the JSON configuration file for workload identity federation in non-Google cloud
// platforms (see https://cloud.google.com/iam/docs/how-to#using-workload-identity-federation).
func CredentialsFromJSONWithParams(ctx context.Context, jsonData []byte, params CredentialsParams) (*Credentials, error) {
// Make defensive copy of the slices in params.
params = params.deepCopy()
// First, attempt to parse jsonData as a Google Developers Console client_credentials.json.
config, _ := ConfigFromJSON(jsonData, params.Scopes...)
if config != nil {
return &Credentials{
ProjectID: "",
TokenSource: authhandler.TokenSourceWithPKCE(ctx, config, params.State, params.AuthHandler, params.PKCE),
JSON: jsonData,
}, nil
}
// Otherwise, parse jsonData as one of the other supported credentials files.
var f credentialsFile
if err := json.Unmarshal(jsonData, &f); err != nil {
return nil, err
}
ts, err := f.tokenSource(ctx, params)
if err != nil {
return nil, err
}
ts = newErrWrappingTokenSource(ts)
return &DefaultCredentials{
ProjectID: f.ProjectID,
TokenSource: ts,
JSON: jsonData,
}, nil
}
// CredentialsFromJSON invokes CredentialsFromJSONWithParams with the specified scopes.
func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*Credentials, error) {
var params CredentialsParams
params.Scopes = scopes
return CredentialsFromJSONWithParams(ctx, jsonData, params)
}
func wellKnownFile() string {
const f = "application_default_credentials.json"
if runtime.GOOS == "windows" {
return filepath.Join(os.Getenv("APPDATA"), "gcloud", f)
}
return filepath.Join(guessUnixHomeDir(), ".config", "gcloud", f)
}
func readCredentialsFile(ctx context.Context, filename string, params CredentialsParams) (*DefaultCredentials, error) {
b, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
return CredentialsFromJSONWithParams(ctx, b, params)
}

84
vendor/golang.org/x/oauth2/google/doc.go generated vendored
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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package google provides support for making OAuth2 authorized and authenticated
// HTTP requests to Google APIs. It supports the Web server flow, client-side
// credentials, service accounts, Google Compute Engine service accounts,
// Google App Engine service accounts and workload identity federation
// from non-Google cloud platforms.
//
// A brief overview of the package follows. For more information, please read
// https://developers.google.com/accounts/docs/OAuth2
// and
// https://developers.google.com/accounts/docs/application-default-credentials.
// For more information on using workload identity federation, refer to
// https://cloud.google.com/iam/docs/how-to#using-workload-identity-federation.
//
// # OAuth2 Configs
//
// Two functions in this package return golang.org/x/oauth2.Config values from Google credential
// data. Google supports two JSON formats for OAuth2 credentials: one is handled by ConfigFromJSON,
// the other by JWTConfigFromJSON. The returned Config can be used to obtain a TokenSource or
// create an http.Client.
//
// # Workload Identity Federation
//
// Using workload identity federation, your application can access Google Cloud
// resources from Amazon Web Services (AWS), Microsoft Azure or any identity
// provider that supports OpenID Connect (OIDC).
// Traditionally, applications running outside Google Cloud have used service
// account keys to access Google Cloud resources. Using identity federation,
// you can allow your workload to impersonate a service account.
// This lets you access Google Cloud resources directly, eliminating the
// maintenance and security burden associated with service account keys.
//
// Follow the detailed instructions on how to configure Workload Identity Federation
// in various platforms:
//
// Amazon Web Services (AWS): https://cloud.google.com/iam/docs/access-resources-aws
// Microsoft Azure: https://cloud.google.com/iam/docs/access-resources-azure
// OIDC identity provider: https://cloud.google.com/iam/docs/access-resources-oidc
//
// For OIDC and SAML providers, the library can retrieve tokens in three ways:
// from a local file location (file-sourced credentials), from a server
// (URL-sourced credentials), or from a local executable (executable-sourced
// credentials).
// For file-sourced credentials, a background process needs to be continuously
// refreshing the file location with a new OIDC token prior to expiration.
// For tokens with one hour lifetimes, the token needs to be updated in the file
// every hour. The token can be stored directly as plain text or in JSON format.
// For URL-sourced credentials, a local server needs to host a GET endpoint to
// return the OIDC token. The response can be in plain text or JSON.
// Additional required request headers can also be specified.
// For executable-sourced credentials, an application needs to be available to
// output the OIDC token and other information in a JSON format.
// For more information on how these work (and how to implement
// executable-sourced credentials), please check out:
// https://cloud.google.com/iam/docs/using-workload-identity-federation#oidc
//
// # Credentials
//
// The Credentials type represents Google credentials, including Application Default
// Credentials.
//
// Use FindDefaultCredentials to obtain Application Default Credentials.
// FindDefaultCredentials looks in some well-known places for a credentials file, and
// will call AppEngineTokenSource or ComputeTokenSource as needed.
//
// Application Default Credentials also support workload identity federation to
// access Google Cloud resources from non-Google Cloud platforms including Amazon
// Web Services (AWS), Microsoft Azure or any identity provider that supports
// OpenID Connect (OIDC). Workload identity federation is recommended for
// non-Google Cloud environments as it avoids the need to download, manage and
// store service account private keys locally.
//
// DefaultClient and DefaultTokenSource are convenience methods. They first call FindDefaultCredentials,
// then use the credentials to construct an http.Client or an oauth2.TokenSource.
//
// Use CredentialsFromJSON to obtain credentials from either of the two JSON formats
// described in OAuth2 Configs, above. The TokenSource in the returned value is the
// same as the one obtained from the oauth2.Config returned from ConfigFromJSON or
// JWTConfigFromJSON, but the Credentials may contain additional information
// that is useful is some circumstances.
package google // import "golang.org/x/oauth2/google"

64
vendor/golang.org/x/oauth2/google/error.go generated vendored
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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"errors"
"golang.org/x/oauth2"
)
// AuthenticationError indicates there was an error in the authentication flow.
//
// Use (*AuthenticationError).Temporary to check if the error can be retried.
type AuthenticationError struct {
err *oauth2.RetrieveError
}
func newAuthenticationError(err error) error {
re := &oauth2.RetrieveError{}
if !errors.As(err, &re) {
return err
}
return &AuthenticationError{
err: re,
}
}
// Temporary indicates that the network error has one of the following status codes and may be retried: 500, 503, 408, or 429.
func (e *AuthenticationError) Temporary() bool {
if e.err.Response == nil {
return false
}
sc := e.err.Response.StatusCode
return sc == 500 || sc == 503 || sc == 408 || sc == 429
}
func (e *AuthenticationError) Error() string {
return e.err.Error()
}
func (e *AuthenticationError) Unwrap() error {
return e.err
}
type errWrappingTokenSource struct {
src oauth2.TokenSource
}
func newErrWrappingTokenSource(ts oauth2.TokenSource) oauth2.TokenSource {
return &errWrappingTokenSource{src: ts}
}
// Token returns the current token if it's still valid, else will
// refresh the current token (using r.Context for HTTP client
// information) and return the new one.
func (s *errWrappingTokenSource) Token() (*oauth2.Token, error) {
t, err := s.src.Token()
if err != nil {
return nil, newAuthenticationError(err)
}
return t, nil
}

277
vendor/golang.org/x/oauth2/google/google.go generated vendored
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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/url"
"strings"
"time"
"cloud.google.com/go/compute/metadata"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google/internal/externalaccount"
"golang.org/x/oauth2/jwt"
)
// Endpoint is Google's OAuth 2.0 default endpoint.
var Endpoint = oauth2.Endpoint{
AuthURL: "https://accounts.google.com/o/oauth2/auth",
TokenURL: "https://oauth2.googleapis.com/token",
AuthStyle: oauth2.AuthStyleInParams,
}
// JWTTokenURL is Google's OAuth 2.0 token URL to use with the JWT flow.
const JWTTokenURL = "https://oauth2.googleapis.com/token"
// ConfigFromJSON uses a Google Developers Console client_credentials.json
// file to construct a config.
// client_credentials.json can be downloaded from
// https://console.developers.google.com, under "Credentials". Download the Web
// application credentials in the JSON format and provide the contents of the
// file as jsonKey.
func ConfigFromJSON(jsonKey []byte, scope ...string) (*oauth2.Config, error) {
type cred struct {
ClientID string `json:"client_id"`
ClientSecret string `json:"client_secret"`
RedirectURIs []string `json:"redirect_uris"`
AuthURI string `json:"auth_uri"`
TokenURI string `json:"token_uri"`
}
var j struct {
Web *cred `json:"web"`
Installed *cred `json:"installed"`
}
if err := json.Unmarshal(jsonKey, &j); err != nil {
return nil, err
}
var c *cred
switch {
case j.Web != nil:
c = j.Web
case j.Installed != nil:
c = j.Installed
default:
return nil, fmt.Errorf("oauth2/google: no credentials found")
}
if len(c.RedirectURIs) < 1 {
return nil, errors.New("oauth2/google: missing redirect URL in the client_credentials.json")
}
return &oauth2.Config{
ClientID: c.ClientID,
ClientSecret: c.ClientSecret,
RedirectURL: c.RedirectURIs[0],
Scopes: scope,
Endpoint: oauth2.Endpoint{
AuthURL: c.AuthURI,
TokenURL: c.TokenURI,
},
}, nil
}
// JWTConfigFromJSON uses a Google Developers service account JSON key file to read
// the credentials that authorize and authenticate the requests.
// Create a service account on "Credentials" for your project at
// https://console.developers.google.com to download a JSON key file.
func JWTConfigFromJSON(jsonKey []byte, scope ...string) (*jwt.Config, error) {
var f credentialsFile
if err := json.Unmarshal(jsonKey, &f); err != nil {
return nil, err
}
if f.Type != serviceAccountKey {
return nil, fmt.Errorf("google: read JWT from JSON credentials: 'type' field is %q (expected %q)", f.Type, serviceAccountKey)
}
scope = append([]string(nil), scope...) // copy
return f.jwtConfig(scope, ""), nil
}
// JSON key file types.
const (
serviceAccountKey = "service_account"
userCredentialsKey = "authorized_user"
externalAccountKey = "external_account"
impersonatedServiceAccount = "impersonated_service_account"
)
// credentialsFile is the unmarshalled representation of a credentials file.
type credentialsFile struct {
Type string `json:"type"`
// Service Account fields
ClientEmail string `json:"client_email"`
PrivateKeyID string `json:"private_key_id"`
PrivateKey string `json:"private_key"`
AuthURL string `json:"auth_uri"`
TokenURL string `json:"token_uri"`
ProjectID string `json:"project_id"`
// User Credential fields
// (These typically come from gcloud auth.)
ClientSecret string `json:"client_secret"`
ClientID string `json:"client_id"`
RefreshToken string `json:"refresh_token"`
// External Account fields
Audience string `json:"audience"`
SubjectTokenType string `json:"subject_token_type"`
TokenURLExternal string `json:"token_url"`
TokenInfoURL string `json:"token_info_url"`
ServiceAccountImpersonationURL string `json:"service_account_impersonation_url"`
ServiceAccountImpersonation serviceAccountImpersonationInfo `json:"service_account_impersonation"`
Delegates []string `json:"delegates"`
CredentialSource externalaccount.CredentialSource `json:"credential_source"`
QuotaProjectID string `json:"quota_project_id"`
WorkforcePoolUserProject string `json:"workforce_pool_user_project"`
// Service account impersonation
SourceCredentials *credentialsFile `json:"source_credentials"`
}
type serviceAccountImpersonationInfo struct {
TokenLifetimeSeconds int `json:"token_lifetime_seconds"`
}
func (f *credentialsFile) jwtConfig(scopes []string, subject string) *jwt.Config {
cfg := &jwt.Config{
Email: f.ClientEmail,
PrivateKey: []byte(f.PrivateKey),
PrivateKeyID: f.PrivateKeyID,
Scopes: scopes,
TokenURL: f.TokenURL,
Subject: subject, // This is the user email to impersonate
Audience: f.Audience,
}
if cfg.TokenURL == "" {
cfg.TokenURL = JWTTokenURL
}
return cfg
}
func (f *credentialsFile) tokenSource(ctx context.Context, params CredentialsParams) (oauth2.TokenSource, error) {
switch f.Type {
case serviceAccountKey:
cfg := f.jwtConfig(params.Scopes, params.Subject)
return cfg.TokenSource(ctx), nil
case userCredentialsKey:
cfg := &oauth2.Config{
ClientID: f.ClientID,
ClientSecret: f.ClientSecret,
Scopes: params.Scopes,
Endpoint: oauth2.Endpoint{
AuthURL: f.AuthURL,
TokenURL: f.TokenURL,
AuthStyle: oauth2.AuthStyleInParams,
},
}
if cfg.Endpoint.AuthURL == "" {
cfg.Endpoint.AuthURL = Endpoint.AuthURL
}
if cfg.Endpoint.TokenURL == "" {
cfg.Endpoint.TokenURL = Endpoint.TokenURL
}
tok := &oauth2.Token{RefreshToken: f.RefreshToken}
return cfg.TokenSource(ctx, tok), nil
case externalAccountKey:
cfg := &externalaccount.Config{
Audience: f.Audience,
SubjectTokenType: f.SubjectTokenType,
TokenURL: f.TokenURLExternal,
TokenInfoURL: f.TokenInfoURL,
ServiceAccountImpersonationURL: f.ServiceAccountImpersonationURL,
ServiceAccountImpersonationLifetimeSeconds: f.ServiceAccountImpersonation.TokenLifetimeSeconds,
ClientSecret: f.ClientSecret,
ClientID: f.ClientID,
CredentialSource: f.CredentialSource,
QuotaProjectID: f.QuotaProjectID,
Scopes: params.Scopes,
WorkforcePoolUserProject: f.WorkforcePoolUserProject,
}
return cfg.TokenSource(ctx)
case impersonatedServiceAccount:
if f.ServiceAccountImpersonationURL == "" || f.SourceCredentials == nil {
return nil, errors.New("missing 'source_credentials' field or 'service_account_impersonation_url' in credentials")
}
ts, err := f.SourceCredentials.tokenSource(ctx, params)
if err != nil {
return nil, err
}
imp := externalaccount.ImpersonateTokenSource{
Ctx: ctx,
URL: f.ServiceAccountImpersonationURL,
Scopes: params.Scopes,
Ts: ts,
Delegates: f.Delegates,
}
return oauth2.ReuseTokenSource(nil, imp), nil
case "":
return nil, errors.New("missing 'type' field in credentials")
default:
return nil, fmt.Errorf("unknown credential type: %q", f.Type)
}
}
// ComputeTokenSource returns a token source that fetches access tokens
// from Google Compute Engine (GCE)'s metadata server. It's only valid to use
// this token source if your program is running on a GCE instance.
// If no account is specified, "default" is used.
// If no scopes are specified, a set of default scopes are automatically granted.
// Further information about retrieving access tokens from the GCE metadata
// server can be found at https://cloud.google.com/compute/docs/authentication.
func ComputeTokenSource(account string, scope ...string) oauth2.TokenSource {
return oauth2.ReuseTokenSource(nil, computeSource{account: account, scopes: scope})
}
type computeSource struct {
account string
scopes []string
}
func (cs computeSource) Token() (*oauth2.Token, error) {
if !metadata.OnGCE() {
return nil, errors.New("oauth2/google: can't get a token from the metadata service; not running on GCE")
}
acct := cs.account
if acct == "" {
acct = "default"
}
tokenURI := "instance/service-accounts/" + acct + "/token"
if len(cs.scopes) > 0 {
v := url.Values{}
v.Set("scopes", strings.Join(cs.scopes, ","))
tokenURI = tokenURI + "?" + v.Encode()
}
tokenJSON, err := metadata.Get(tokenURI)
if err != nil {
return nil, err
}
var res struct {
AccessToken string `json:"access_token"`
ExpiresInSec int `json:"expires_in"`
TokenType string `json:"token_type"`
}
err = json.NewDecoder(strings.NewReader(tokenJSON)).Decode(&res)
if err != nil {
return nil, fmt.Errorf("oauth2/google: invalid token JSON from metadata: %v", err)
}
if res.ExpiresInSec == 0 || res.AccessToken == "" {
return nil, fmt.Errorf("oauth2/google: incomplete token received from metadata")
}
tok := &oauth2.Token{
AccessToken: res.AccessToken,
TokenType: res.TokenType,
Expiry: time.Now().Add(time.Duration(res.ExpiresInSec) * time.Second),
}
// NOTE(cbro): add hidden metadata about where the token is from.
// This is needed for detection by client libraries to know that credentials come from the metadata server.
// This may be removed in a future version of this library.
return tok.WithExtra(map[string]interface{}{
"oauth2.google.tokenSource": "compute-metadata",
"oauth2.google.serviceAccount": acct,
}), nil
}

530
vendor/golang.org/x/oauth2/google/internal/externalaccount/aws.go generated vendored
View File

@@ -1,530 +0,0 @@
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"bytes"
"context"
"crypto/hmac"
"crypto/sha256"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"path"
"sort"
"strings"
"time"
"golang.org/x/oauth2"
)
type awsSecurityCredentials struct {
AccessKeyID string `json:"AccessKeyID"`
SecretAccessKey string `json:"SecretAccessKey"`
SecurityToken string `json:"Token"`
}
// awsRequestSigner is a utility class to sign http requests using a AWS V4 signature.
type awsRequestSigner struct {
RegionName string
AwsSecurityCredentials awsSecurityCredentials
}
// getenv aliases os.Getenv for testing
var getenv = os.Getenv
const (
// AWS Signature Version 4 signing algorithm identifier.
awsAlgorithm = "AWS4-HMAC-SHA256"
// The termination string for the AWS credential scope value as defined in
// https://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
awsRequestType = "aws4_request"
// The AWS authorization header name for the security session token if available.
awsSecurityTokenHeader = "x-amz-security-token"
// The name of the header containing the session token for metadata endpoint calls
awsIMDSv2SessionTokenHeader = "X-aws-ec2-metadata-token"
awsIMDSv2SessionTtlHeader = "X-aws-ec2-metadata-token-ttl-seconds"
awsIMDSv2SessionTtl = "300"
// The AWS authorization header name for the auto-generated date.
awsDateHeader = "x-amz-date"
awsTimeFormatLong = "20060102T150405Z"
awsTimeFormatShort = "20060102"
)
func getSha256(input []byte) (string, error) {
hash := sha256.New()
if _, err := hash.Write(input); err != nil {
return "", err
}
return hex.EncodeToString(hash.Sum(nil)), nil
}
func getHmacSha256(key, input []byte) ([]byte, error) {
hash := hmac.New(sha256.New, key)
if _, err := hash.Write(input); err != nil {
return nil, err
}
return hash.Sum(nil), nil
}
func cloneRequest(r *http.Request) *http.Request {
r2 := new(http.Request)
*r2 = *r
if r.Header != nil {
r2.Header = make(http.Header, len(r.Header))
// Find total number of values.
headerCount := 0
for _, headerValues := range r.Header {
headerCount += len(headerValues)
}
copiedHeaders := make([]string, headerCount) // shared backing array for headers' values
for headerKey, headerValues := range r.Header {
headerCount = copy(copiedHeaders, headerValues)
r2.Header[headerKey] = copiedHeaders[:headerCount:headerCount]
copiedHeaders = copiedHeaders[headerCount:]
}
}
return r2
}
func canonicalPath(req *http.Request) string {
result := req.URL.EscapedPath()
if result == "" {
return "/"
}
return path.Clean(result)
}
func canonicalQuery(req *http.Request) string {
queryValues := req.URL.Query()
for queryKey := range queryValues {
sort.Strings(queryValues[queryKey])
}
return queryValues.Encode()
}
func canonicalHeaders(req *http.Request) (string, string) {
// Header keys need to be sorted alphabetically.
var headers []string
lowerCaseHeaders := make(http.Header)
for k, v := range req.Header {
k := strings.ToLower(k)
if _, ok := lowerCaseHeaders[k]; ok {
// include additional values
lowerCaseHeaders[k] = append(lowerCaseHeaders[k], v...)
} else {
headers = append(headers, k)
lowerCaseHeaders[k] = v
}
}
sort.Strings(headers)
var fullHeaders bytes.Buffer
for _, header := range headers {
headerValue := strings.Join(lowerCaseHeaders[header], ",")
fullHeaders.WriteString(header)
fullHeaders.WriteRune(':')
fullHeaders.WriteString(headerValue)
fullHeaders.WriteRune('\n')
}
return strings.Join(headers, ";"), fullHeaders.String()
}
func requestDataHash(req *http.Request) (string, error) {
var requestData []byte
if req.Body != nil {
requestBody, err := req.GetBody()
if err != nil {
return "", err
}
defer requestBody.Close()
requestData, err = ioutil.ReadAll(io.LimitReader(requestBody, 1<<20))
if err != nil {
return "", err
}
}
return getSha256(requestData)
}
func requestHost(req *http.Request) string {
if req.Host != "" {
return req.Host
}
return req.URL.Host
}
func canonicalRequest(req *http.Request, canonicalHeaderColumns, canonicalHeaderData string) (string, error) {
dataHash, err := requestDataHash(req)
if err != nil {
return "", err
}
return fmt.Sprintf("%s\n%s\n%s\n%s\n%s\n%s", req.Method, canonicalPath(req), canonicalQuery(req), canonicalHeaderData, canonicalHeaderColumns, dataHash), nil
}
// SignRequest adds the appropriate headers to an http.Request
// or returns an error if something prevented this.
func (rs *awsRequestSigner) SignRequest(req *http.Request) error {
signedRequest := cloneRequest(req)
timestamp := now()
signedRequest.Header.Add("host", requestHost(req))
if rs.AwsSecurityCredentials.SecurityToken != "" {
signedRequest.Header.Add(awsSecurityTokenHeader, rs.AwsSecurityCredentials.SecurityToken)
}
if signedRequest.Header.Get("date") == "" {
signedRequest.Header.Add(awsDateHeader, timestamp.Format(awsTimeFormatLong))
}
authorizationCode, err := rs.generateAuthentication(signedRequest, timestamp)
if err != nil {
return err
}
signedRequest.Header.Set("Authorization", authorizationCode)
req.Header = signedRequest.Header
return nil
}
func (rs *awsRequestSigner) generateAuthentication(req *http.Request, timestamp time.Time) (string, error) {
canonicalHeaderColumns, canonicalHeaderData := canonicalHeaders(req)
dateStamp := timestamp.Format(awsTimeFormatShort)
serviceName := ""
if splitHost := strings.Split(requestHost(req), "."); len(splitHost) > 0 {
serviceName = splitHost[0]
}
credentialScope := fmt.Sprintf("%s/%s/%s/%s", dateStamp, rs.RegionName, serviceName, awsRequestType)
requestString, err := canonicalRequest(req, canonicalHeaderColumns, canonicalHeaderData)
if err != nil {
return "", err
}
requestHash, err := getSha256([]byte(requestString))
if err != nil {
return "", err
}
stringToSign := fmt.Sprintf("%s\n%s\n%s\n%s", awsAlgorithm, timestamp.Format(awsTimeFormatLong), credentialScope, requestHash)
signingKey := []byte("AWS4" + rs.AwsSecurityCredentials.SecretAccessKey)
for _, signingInput := range []string{
dateStamp, rs.RegionName, serviceName, awsRequestType, stringToSign,
} {
signingKey, err = getHmacSha256(signingKey, []byte(signingInput))
if err != nil {
return "", err
}
}
return fmt.Sprintf("%s Credential=%s/%s, SignedHeaders=%s, Signature=%s", awsAlgorithm, rs.AwsSecurityCredentials.AccessKeyID, credentialScope, canonicalHeaderColumns, hex.EncodeToString(signingKey)), nil
}
type awsCredentialSource struct {
EnvironmentID string
RegionURL string
RegionalCredVerificationURL string
CredVerificationURL string
IMDSv2SessionTokenURL string
TargetResource string
requestSigner *awsRequestSigner
region string
ctx context.Context
client *http.Client
}
type awsRequestHeader struct {
Key string `json:"key"`
Value string `json:"value"`
}
type awsRequest struct {
URL string `json:"url"`
Method string `json:"method"`
Headers []awsRequestHeader `json:"headers"`
}
func (cs awsCredentialSource) doRequest(req *http.Request) (*http.Response, error) {
if cs.client == nil {
cs.client = oauth2.NewClient(cs.ctx, nil)
}
return cs.client.Do(req.WithContext(cs.ctx))
}
func (cs awsCredentialSource) subjectToken() (string, error) {
if cs.requestSigner == nil {
awsSessionToken, err := cs.getAWSSessionToken()
if err != nil {
return "", err
}
headers := make(map[string]string)
if awsSessionToken != "" {
headers[awsIMDSv2SessionTokenHeader] = awsSessionToken
}
awsSecurityCredentials, err := cs.getSecurityCredentials(headers)
if err != nil {
return "", err
}
if cs.region, err = cs.getRegion(headers); err != nil {
return "", err
}
cs.requestSigner = &awsRequestSigner{
RegionName: cs.region,
AwsSecurityCredentials: awsSecurityCredentials,
}
}
// Generate the signed request to AWS STS GetCallerIdentity API.
// Use the required regional endpoint. Otherwise, the request will fail.
req, err := http.NewRequest("POST", strings.Replace(cs.RegionalCredVerificationURL, "{region}", cs.region, 1), nil)
if err != nil {
return "", err
}
// The full, canonical resource name of the workload identity pool
// provider, with or without the HTTPS prefix.
// Including this header as part of the signature is recommended to
// ensure data integrity.
if cs.TargetResource != "" {
req.Header.Add("x-goog-cloud-target-resource", cs.TargetResource)
}
cs.requestSigner.SignRequest(req)
/*
The GCP STS endpoint expects the headers to be formatted as:
# [
# {key: 'x-amz-date', value: '...'},
# {key: 'Authorization', value: '...'},
# ...
# ]
# And then serialized as:
# quote(json.dumps({
# url: '...',
# method: 'POST',
# headers: [{key: 'x-amz-date', value: '...'}, ...]
# }))
*/
awsSignedReq := awsRequest{
URL: req.URL.String(),
Method: "POST",
}
for headerKey, headerList := range req.Header {
for _, headerValue := range headerList {
awsSignedReq.Headers = append(awsSignedReq.Headers, awsRequestHeader{
Key: headerKey,
Value: headerValue,
})
}
}
sort.Slice(awsSignedReq.Headers, func(i, j int) bool {
headerCompare := strings.Compare(awsSignedReq.Headers[i].Key, awsSignedReq.Headers[j].Key)
if headerCompare == 0 {
return strings.Compare(awsSignedReq.Headers[i].Value, awsSignedReq.Headers[j].Value) < 0
}
return headerCompare < 0
})
result, err := json.Marshal(awsSignedReq)
if err != nil {
return "", err
}
return url.QueryEscape(string(result)), nil
}
func (cs *awsCredentialSource) getAWSSessionToken() (string, error) {
if cs.IMDSv2SessionTokenURL == "" {
return "", nil
}
req, err := http.NewRequest("PUT", cs.IMDSv2SessionTokenURL, nil)
if err != nil {
return "", err
}
req.Header.Add(awsIMDSv2SessionTtlHeader, awsIMDSv2SessionTtl)
resp, err := cs.doRequest(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return "", err
}
if resp.StatusCode != 200 {
return "", fmt.Errorf("oauth2/google: unable to retrieve AWS session token - %s", string(respBody))
}
return string(respBody), nil
}
func (cs *awsCredentialSource) getRegion(headers map[string]string) (string, error) {
if envAwsRegion := getenv("AWS_REGION"); envAwsRegion != "" {
return envAwsRegion, nil
}
if envAwsRegion := getenv("AWS_DEFAULT_REGION"); envAwsRegion != "" {
return envAwsRegion, nil
}
if cs.RegionURL == "" {
return "", errors.New("oauth2/google: unable to determine AWS region")
}
req, err := http.NewRequest("GET", cs.RegionURL, nil)
if err != nil {
return "", err
}
for name, value := range headers {
req.Header.Add(name, value)
}
resp, err := cs.doRequest(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return "", err
}
if resp.StatusCode != 200 {
return "", fmt.Errorf("oauth2/google: unable to retrieve AWS region - %s", string(respBody))
}
// This endpoint will return the region in format: us-east-2b.
// Only the us-east-2 part should be used.
respBodyEnd := 0
if len(respBody) > 1 {
respBodyEnd = len(respBody) - 1
}
return string(respBody[:respBodyEnd]), nil
}
func (cs *awsCredentialSource) getSecurityCredentials(headers map[string]string) (result awsSecurityCredentials, err error) {
if accessKeyID := getenv("AWS_ACCESS_KEY_ID"); accessKeyID != "" {
if secretAccessKey := getenv("AWS_SECRET_ACCESS_KEY"); secretAccessKey != "" {
return awsSecurityCredentials{
AccessKeyID: accessKeyID,
SecretAccessKey: secretAccessKey,
SecurityToken: getenv("AWS_SESSION_TOKEN"),
}, nil
}
}
roleName, err := cs.getMetadataRoleName(headers)
if err != nil {
return
}
credentials, err := cs.getMetadataSecurityCredentials(roleName, headers)
if err != nil {
return
}
if credentials.AccessKeyID == "" {
return result, errors.New("oauth2/google: missing AccessKeyId credential")
}
if credentials.SecretAccessKey == "" {
return result, errors.New("oauth2/google: missing SecretAccessKey credential")
}
return credentials, nil
}
func (cs *awsCredentialSource) getMetadataSecurityCredentials(roleName string, headers map[string]string) (awsSecurityCredentials, error) {
var result awsSecurityCredentials
req, err := http.NewRequest("GET", fmt.Sprintf("%s/%s", cs.CredVerificationURL, roleName), nil)
if err != nil {
return result, err
}
req.Header.Add("Content-Type", "application/json")
for name, value := range headers {
req.Header.Add(name, value)
}
resp, err := cs.doRequest(req)
if err != nil {
return result, err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return result, err
}
if resp.StatusCode != 200 {
return result, fmt.Errorf("oauth2/google: unable to retrieve AWS security credentials - %s", string(respBody))
}
err = json.Unmarshal(respBody, &result)
return result, err
}
func (cs *awsCredentialSource) getMetadataRoleName(headers map[string]string) (string, error) {
if cs.CredVerificationURL == "" {
return "", errors.New("oauth2/google: unable to determine the AWS metadata server security credentials endpoint")
}
req, err := http.NewRequest("GET", cs.CredVerificationURL, nil)
if err != nil {
return "", err
}
for name, value := range headers {
req.Header.Add(name, value)
}
resp, err := cs.doRequest(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return "", err
}
if resp.StatusCode != 200 {
return "", fmt.Errorf("oauth2/google: unable to retrieve AWS role name - %s", string(respBody))
}
return string(respBody), nil
}

293
vendor/golang.org/x/oauth2/google/internal/externalaccount/basecredentials.go generated vendored
View File

@@ -1,293 +0,0 @@
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"context"
"fmt"
"net/http"
"net/url"
"regexp"
"strconv"
"strings"
"time"
"golang.org/x/oauth2"
)
// now aliases time.Now for testing
var now = func() time.Time {
return time.Now().UTC()
}
// Config stores the configuration for fetching tokens with external credentials.
type Config struct {
// Audience is the Secure Token Service (STS) audience which contains the resource name for the workload
// identity pool or the workforce pool and the provider identifier in that pool.
Audience string
// SubjectTokenType is the STS token type based on the Oauth2.0 token exchange spec
// e.g. `urn:ietf:params:oauth:token-type:jwt`.
SubjectTokenType string
// TokenURL is the STS token exchange endpoint.
TokenURL string
// TokenInfoURL is the token_info endpoint used to retrieve the account related information (
// user attributes like account identifier, eg. email, username, uid, etc). This is
// needed for gCloud session account identification.
TokenInfoURL string
// ServiceAccountImpersonationURL is the URL for the service account impersonation request. This is only
// required for workload identity pools when APIs to be accessed have not integrated with UberMint.
ServiceAccountImpersonationURL string
// ServiceAccountImpersonationLifetimeSeconds is the number of seconds the service account impersonation
// token will be valid for.
ServiceAccountImpersonationLifetimeSeconds int
// ClientSecret is currently only required if token_info endpoint also
// needs to be called with the generated GCP access token. When provided, STS will be
// called with additional basic authentication using client_id as username and client_secret as password.
ClientSecret string
// ClientID is only required in conjunction with ClientSecret, as described above.
ClientID string
// CredentialSource contains the necessary information to retrieve the token itself, as well
// as some environmental information.
CredentialSource CredentialSource
// QuotaProjectID is injected by gCloud. If the value is non-empty, the Auth libraries
// will set the x-goog-user-project which overrides the project associated with the credentials.
QuotaProjectID string
// Scopes contains the desired scopes for the returned access token.
Scopes []string
// The optional workforce pool user project number when the credential
// corresponds to a workforce pool and not a workload identity pool.
// The underlying principal must still have serviceusage.services.use IAM
// permission to use the project for billing/quota.
WorkforcePoolUserProject string
}
// Each element consists of a list of patterns. validateURLs checks for matches
// that include all elements in a given list, in that order.
var (
validTokenURLPatterns = []*regexp.Regexp{
// The complicated part in the middle matches any number of characters that
// aren't period, spaces, or slashes.
regexp.MustCompile(`(?i)^[^\.\s\/\\]+\.sts\.googleapis\.com$`),
regexp.MustCompile(`(?i)^sts\.googleapis\.com$`),
regexp.MustCompile(`(?i)^sts\.[^\.\s\/\\]+\.googleapis\.com$`),
regexp.MustCompile(`(?i)^[^\.\s\/\\]+-sts\.googleapis\.com$`),
regexp.MustCompile(`(?i)^sts-[^\.\s\/\\]+\.p\.googleapis\.com$`),
}
validImpersonateURLPatterns = []*regexp.Regexp{
regexp.MustCompile(`^[^\.\s\/\\]+\.iamcredentials\.googleapis\.com$`),
regexp.MustCompile(`^iamcredentials\.googleapis\.com$`),
regexp.MustCompile(`^iamcredentials\.[^\.\s\/\\]+\.googleapis\.com$`),
regexp.MustCompile(`^[^\.\s\/\\]+-iamcredentials\.googleapis\.com$`),
regexp.MustCompile(`^iamcredentials-[^\.\s\/\\]+\.p\.googleapis\.com$`),
}
validWorkforceAudiencePattern *regexp.Regexp = regexp.MustCompile(`//iam\.googleapis\.com/locations/[^/]+/workforcePools/`)
)
func validateURL(input string, patterns []*regexp.Regexp, scheme string) bool {
parsed, err := url.Parse(input)
if err != nil {
return false
}
if !strings.EqualFold(parsed.Scheme, scheme) {
return false
}
toTest := parsed.Host
for _, pattern := range patterns {
if pattern.MatchString(toTest) {
return true
}
}
return false
}
func validateWorkforceAudience(input string) bool {
return validWorkforceAudiencePattern.MatchString(input)
}
// TokenSource Returns an external account TokenSource struct. This is to be called by package google to construct a google.Credentials.
func (c *Config) TokenSource(ctx context.Context) (oauth2.TokenSource, error) {
return c.tokenSource(ctx, validTokenURLPatterns, validImpersonateURLPatterns, "https")
}
// tokenSource is a private function that's directly called by some of the tests,
// because the unit test URLs are mocked, and would otherwise fail the
// validity check.
func (c *Config) tokenSource(ctx context.Context, tokenURLValidPats []*regexp.Regexp, impersonateURLValidPats []*regexp.Regexp, scheme string) (oauth2.TokenSource, error) {
valid := validateURL(c.TokenURL, tokenURLValidPats, scheme)
if !valid {
return nil, fmt.Errorf("oauth2/google: invalid TokenURL provided while constructing tokenSource")
}
if c.ServiceAccountImpersonationURL != "" {
valid := validateURL(c.ServiceAccountImpersonationURL, impersonateURLValidPats, scheme)
if !valid {
return nil, fmt.Errorf("oauth2/google: invalid ServiceAccountImpersonationURL provided while constructing tokenSource")
}
}
if c.WorkforcePoolUserProject != "" {
valid := validateWorkforceAudience(c.Audience)
if !valid {
return nil, fmt.Errorf("oauth2/google: workforce_pool_user_project should not be set for non-workforce pool credentials")
}
}
ts := tokenSource{
ctx: ctx,
conf: c,
}
if c.ServiceAccountImpersonationURL == "" {
return oauth2.ReuseTokenSource(nil, ts), nil
}
scopes := c.Scopes
ts.conf.Scopes = []string{"https://www.googleapis.com/auth/cloud-platform"}
imp := ImpersonateTokenSource{
Ctx: ctx,
URL: c.ServiceAccountImpersonationURL,
Scopes: scopes,
Ts: oauth2.ReuseTokenSource(nil, ts),
TokenLifetimeSeconds: c.ServiceAccountImpersonationLifetimeSeconds,
}
return oauth2.ReuseTokenSource(nil, imp), nil
}
// Subject token file types.
const (
fileTypeText = "text"
fileTypeJSON = "json"
)
type format struct {
// Type is either "text" or "json". When not provided "text" type is assumed.
Type string `json:"type"`
// SubjectTokenFieldName is only required for JSON format. This would be "access_token" for azure.
SubjectTokenFieldName string `json:"subject_token_field_name"`
}
// CredentialSource stores the information necessary to retrieve the credentials for the STS exchange.
// One field amongst File, URL, and Executable should be filled, depending on the kind of credential in question.
// The EnvironmentID should start with AWS if being used for an AWS credential.
type CredentialSource struct {
File string `json:"file"`
URL string `json:"url"`
Headers map[string]string `json:"headers"`
Executable *ExecutableConfig `json:"executable"`
EnvironmentID string `json:"environment_id"`
RegionURL string `json:"region_url"`
RegionalCredVerificationURL string `json:"regional_cred_verification_url"`
CredVerificationURL string `json:"cred_verification_url"`
IMDSv2SessionTokenURL string `json:"imdsv2_session_token_url"`
Format format `json:"format"`
}
type ExecutableConfig struct {
Command string `json:"command"`
TimeoutMillis *int `json:"timeout_millis"`
OutputFile string `json:"output_file"`
}
// parse determines the type of CredentialSource needed.
func (c *Config) parse(ctx context.Context) (baseCredentialSource, error) {
if len(c.CredentialSource.EnvironmentID) > 3 && c.CredentialSource.EnvironmentID[:3] == "aws" {
if awsVersion, err := strconv.Atoi(c.CredentialSource.EnvironmentID[3:]); err == nil {
if awsVersion != 1 {
return nil, fmt.Errorf("oauth2/google: aws version '%d' is not supported in the current build", awsVersion)
}
awsCredSource := awsCredentialSource{
EnvironmentID: c.CredentialSource.EnvironmentID,
RegionURL: c.CredentialSource.RegionURL,
RegionalCredVerificationURL: c.CredentialSource.RegionalCredVerificationURL,
CredVerificationURL: c.CredentialSource.URL,
TargetResource: c.Audience,
ctx: ctx,
}
if c.CredentialSource.IMDSv2SessionTokenURL != "" {
awsCredSource.IMDSv2SessionTokenURL = c.CredentialSource.IMDSv2SessionTokenURL
}
return awsCredSource, nil
}
} else if c.CredentialSource.File != "" {
return fileCredentialSource{File: c.CredentialSource.File, Format: c.CredentialSource.Format}, nil
} else if c.CredentialSource.URL != "" {
return urlCredentialSource{URL: c.CredentialSource.URL, Headers: c.CredentialSource.Headers, Format: c.CredentialSource.Format, ctx: ctx}, nil
} else if c.CredentialSource.Executable != nil {
return CreateExecutableCredential(ctx, c.CredentialSource.Executable, c)
}
return nil, fmt.Errorf("oauth2/google: unable to parse credential source")
}
type baseCredentialSource interface {
subjectToken() (string, error)
}
// tokenSource is the source that handles external credentials. It is used to retrieve Tokens.
type tokenSource struct {
ctx context.Context
conf *Config
}
// Token allows tokenSource to conform to the oauth2.TokenSource interface.
func (ts tokenSource) Token() (*oauth2.Token, error) {
conf := ts.conf
credSource, err := conf.parse(ts.ctx)
if err != nil {
return nil, err
}
subjectToken, err := credSource.subjectToken()
if err != nil {
return nil, err
}
stsRequest := stsTokenExchangeRequest{
GrantType: "urn:ietf:params:oauth:grant-type:token-exchange",
Audience: conf.Audience,
Scope: conf.Scopes,
RequestedTokenType: "urn:ietf:params:oauth:token-type:access_token",
SubjectToken: subjectToken,
SubjectTokenType: conf.SubjectTokenType,
}
header := make(http.Header)
header.Add("Content-Type", "application/x-www-form-urlencoded")
clientAuth := clientAuthentication{
AuthStyle: oauth2.AuthStyleInHeader,
ClientID: conf.ClientID,
ClientSecret: conf.ClientSecret,
}
var options map[string]interface{}
// Do not pass workforce_pool_user_project when client authentication is used.
// The client ID is sufficient for determining the user project.
if conf.WorkforcePoolUserProject != "" && conf.ClientID == "" {
options = map[string]interface{}{
"userProject": conf.WorkforcePoolUserProject,
}
}
stsResp, err := exchangeToken(ts.ctx, conf.TokenURL, &stsRequest, clientAuth, header, options)
if err != nil {
return nil, err
}
accessToken := &oauth2.Token{
AccessToken: stsResp.AccessToken,
TokenType: stsResp.TokenType,
}
if stsResp.ExpiresIn < 0 {
return nil, fmt.Errorf("oauth2/google: got invalid expiry from security token service")
} else if stsResp.ExpiresIn >= 0 {
accessToken.Expiry = now().Add(time.Duration(stsResp.ExpiresIn) * time.Second)
}
if stsResp.RefreshToken != "" {
accessToken.RefreshToken = stsResp.RefreshToken
}
return accessToken, nil
}

45
vendor/golang.org/x/oauth2/google/internal/externalaccount/clientauth.go generated vendored
View File

@@ -1,45 +0,0 @@
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"encoding/base64"
"net/http"
"net/url"
"golang.org/x/oauth2"
)
// clientAuthentication represents an OAuth client ID and secret and the mechanism for passing these credentials as stated in rfc6749#2.3.1.
type clientAuthentication struct {
// AuthStyle can be either basic or request-body
AuthStyle oauth2.AuthStyle
ClientID string
ClientSecret string
}
// InjectAuthentication is used to add authentication to a Secure Token Service exchange
// request. It modifies either the passed url.Values or http.Header depending on the desired
// authentication format.
func (c *clientAuthentication) InjectAuthentication(values url.Values, headers http.Header) {
if c.ClientID == "" || c.ClientSecret == "" || values == nil || headers == nil {
return
}
switch c.AuthStyle {
case oauth2.AuthStyleInHeader: // AuthStyleInHeader corresponds to basic authentication as defined in rfc7617#2
plainHeader := c.ClientID + ":" + c.ClientSecret
headers.Add("Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(plainHeader)))
case oauth2.AuthStyleInParams: // AuthStyleInParams corresponds to request-body authentication with ClientID and ClientSecret in the message body.
values.Set("client_id", c.ClientID)
values.Set("client_secret", c.ClientSecret)
case oauth2.AuthStyleAutoDetect:
values.Set("client_id", c.ClientID)
values.Set("client_secret", c.ClientSecret)
default:
values.Set("client_id", c.ClientID)
values.Set("client_secret", c.ClientSecret)
}
}

18
vendor/golang.org/x/oauth2/google/internal/externalaccount/err.go generated vendored
View File

@@ -1,18 +0,0 @@
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import "fmt"
// Error for handling OAuth related error responses as stated in rfc6749#5.2.
type Error struct {
Code string
URI string
Description string
}
func (err *Error) Error() string {
return fmt.Sprintf("got error code %s from %s: %s", err.Code, err.URI, err.Description)
}

309
vendor/golang.org/x/oauth2/google/internal/externalaccount/executablecredsource.go generated vendored
View File

@@ -1,309 +0,0 @@
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"regexp"
"strings"
"time"
)
var serviceAccountImpersonationRE = regexp.MustCompile("https://iamcredentials.googleapis.com/v1/projects/-/serviceAccounts/(.*@.*):generateAccessToken")
const (
executableSupportedMaxVersion = 1
defaultTimeout = 30 * time.Second
timeoutMinimum = 5 * time.Second
timeoutMaximum = 120 * time.Second
executableSource = "response"
outputFileSource = "output file"
)
type nonCacheableError struct {
message string
}
func (nce nonCacheableError) Error() string {
return nce.message
}
func missingFieldError(source, field string) error {
return fmt.Errorf("oauth2/google: %v missing `%q` field", source, field)
}
func jsonParsingError(source, data string) error {
return fmt.Errorf("oauth2/google: unable to parse %v\nResponse: %v", source, data)
}
func malformedFailureError() error {
return nonCacheableError{"oauth2/google: response must include `error` and `message` fields when unsuccessful"}
}
func userDefinedError(code, message string) error {
return nonCacheableError{fmt.Sprintf("oauth2/google: response contains unsuccessful response: (%v) %v", code, message)}
}
func unsupportedVersionError(source string, version int) error {
return fmt.Errorf("oauth2/google: %v contains unsupported version: %v", source, version)
}
func tokenExpiredError() error {
return nonCacheableError{"oauth2/google: the token returned by the executable is expired"}
}
func tokenTypeError(source string) error {
return fmt.Errorf("oauth2/google: %v contains unsupported token type", source)
}
func exitCodeError(exitCode int) error {
return fmt.Errorf("oauth2/google: executable command failed with exit code %v", exitCode)
}
func executableError(err error) error {
return fmt.Errorf("oauth2/google: executable command failed: %v", err)
}
func executablesDisallowedError() error {
return errors.New("oauth2/google: executables need to be explicitly allowed (set GOOGLE_EXTERNAL_ACCOUNT_ALLOW_EXECUTABLES to '1') to run")
}
func timeoutRangeError() error {
return errors.New("oauth2/google: invalid `timeout_millis` field — executable timeout must be between 5 and 120 seconds")
}
func commandMissingError() error {
return errors.New("oauth2/google: missing `command` field — executable command must be provided")
}
type environment interface {
existingEnv() []string
getenv(string) string
run(ctx context.Context, command string, env []string) ([]byte, error)
now() time.Time
}
type runtimeEnvironment struct{}
func (r runtimeEnvironment) existingEnv() []string {
return os.Environ()
}
func (r runtimeEnvironment) getenv(key string) string {
return os.Getenv(key)
}
func (r runtimeEnvironment) now() time.Time {
return time.Now().UTC()
}
func (r runtimeEnvironment) run(ctx context.Context, command string, env []string) ([]byte, error) {
splitCommand := strings.Fields(command)
cmd := exec.CommandContext(ctx, splitCommand[0], splitCommand[1:]...)
cmd.Env = env
var stdout, stderr bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = &stderr
if err := cmd.Run(); err != nil {
if ctx.Err() == context.DeadlineExceeded {
return nil, context.DeadlineExceeded
}
if exitError, ok := err.(*exec.ExitError); ok {
return nil, exitCodeError(exitError.ExitCode())
}
return nil, executableError(err)
}
bytesStdout := bytes.TrimSpace(stdout.Bytes())
if len(bytesStdout) > 0 {
return bytesStdout, nil
}
return bytes.TrimSpace(stderr.Bytes()), nil
}
type executableCredentialSource struct {
Command string
Timeout time.Duration
OutputFile string
ctx context.Context
config *Config
env environment
}
// CreateExecutableCredential creates an executableCredentialSource given an ExecutableConfig.
// It also performs defaulting and type conversions.
func CreateExecutableCredential(ctx context.Context, ec *ExecutableConfig, config *Config) (executableCredentialSource, error) {
if ec.Command == "" {
return executableCredentialSource{}, commandMissingError()
}
result := executableCredentialSource{}
result.Command = ec.Command
if ec.TimeoutMillis == nil {
result.Timeout = defaultTimeout
} else {
result.Timeout = time.Duration(*ec.TimeoutMillis) * time.Millisecond
if result.Timeout < timeoutMinimum || result.Timeout > timeoutMaximum {
return executableCredentialSource{}, timeoutRangeError()
}
}
result.OutputFile = ec.OutputFile
result.ctx = ctx
result.config = config
result.env = runtimeEnvironment{}
return result, nil
}
type executableResponse struct {
Version int `json:"version,omitempty"`
Success *bool `json:"success,omitempty"`
TokenType string `json:"token_type,omitempty"`
ExpirationTime int64 `json:"expiration_time,omitempty"`
IdToken string `json:"id_token,omitempty"`
SamlResponse string `json:"saml_response,omitempty"`
Code string `json:"code,omitempty"`
Message string `json:"message,omitempty"`
}
func (cs executableCredentialSource) parseSubjectTokenFromSource(response []byte, source string, now int64) (string, error) {
var result executableResponse
if err := json.Unmarshal(response, &result); err != nil {
return "", jsonParsingError(source, string(response))
}
if result.Version == 0 {
return "", missingFieldError(source, "version")
}
if result.Success == nil {
return "", missingFieldError(source, "success")
}
if !*result.Success {
if result.Code == "" || result.Message == "" {
return "", malformedFailureError()
}
return "", userDefinedError(result.Code, result.Message)
}
if result.Version > executableSupportedMaxVersion || result.Version < 0 {
return "", unsupportedVersionError(source, result.Version)
}
if result.ExpirationTime == 0 && cs.OutputFile != "" {
return "", missingFieldError(source, "expiration_time")
}
if result.TokenType == "" {
return "", missingFieldError(source, "token_type")
}
if result.ExpirationTime != 0 && result.ExpirationTime < now {
return "", tokenExpiredError()
}
if result.TokenType == "urn:ietf:params:oauth:token-type:jwt" || result.TokenType == "urn:ietf:params:oauth:token-type:id_token" {
if result.IdToken == "" {
return "", missingFieldError(source, "id_token")
}
return result.IdToken, nil
}
if result.TokenType == "urn:ietf:params:oauth:token-type:saml2" {
if result.SamlResponse == "" {
return "", missingFieldError(source, "saml_response")
}
return result.SamlResponse, nil
}
return "", tokenTypeError(source)
}
func (cs executableCredentialSource) subjectToken() (string, error) {
if token, err := cs.getTokenFromOutputFile(); token != "" || err != nil {
return token, err
}
return cs.getTokenFromExecutableCommand()
}
func (cs executableCredentialSource) getTokenFromOutputFile() (token string, err error) {
if cs.OutputFile == "" {
// This ExecutableCredentialSource doesn't use an OutputFile.
return "", nil
}
file, err := os.Open(cs.OutputFile)
if err != nil {
// No OutputFile found. Hasn't been created yet, so skip it.
return "", nil
}
defer file.Close()
data, err := ioutil.ReadAll(io.LimitReader(file, 1<<20))
if err != nil || len(data) == 0 {
// Cachefile exists, but no data found. Get new credential.
return "", nil
}
token, err = cs.parseSubjectTokenFromSource(data, outputFileSource, cs.env.now().Unix())
if err != nil {
if _, ok := err.(nonCacheableError); ok {
// If the cached token is expired we need a new token,
// and if the cache contains a failure, we need to try again.
return "", nil
}
// There was an error in the cached token, and the developer should be aware of it.
return "", err
}
// Token parsing succeeded. Use found token.
return token, nil
}
func (cs executableCredentialSource) executableEnvironment() []string {
result := cs.env.existingEnv()
result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_AUDIENCE=%v", cs.config.Audience))
result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_TOKEN_TYPE=%v", cs.config.SubjectTokenType))
result = append(result, "GOOGLE_EXTERNAL_ACCOUNT_INTERACTIVE=0")
if cs.config.ServiceAccountImpersonationURL != "" {
matches := serviceAccountImpersonationRE.FindStringSubmatch(cs.config.ServiceAccountImpersonationURL)
if matches != nil {
result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_IMPERSONATED_EMAIL=%v", matches[1]))
}
}
if cs.OutputFile != "" {
result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_OUTPUT_FILE=%v", cs.OutputFile))
}
return result
}
func (cs executableCredentialSource) getTokenFromExecutableCommand() (string, error) {
// For security reasons, we need our consumers to set this environment variable to allow executables to be run.
if cs.env.getenv("GOOGLE_EXTERNAL_ACCOUNT_ALLOW_EXECUTABLES") != "1" {
return "", executablesDisallowedError()
}
ctx, cancel := context.WithDeadline(cs.ctx, cs.env.now().Add(cs.Timeout))
defer cancel()
output, err := cs.env.run(ctx, cs.Command, cs.executableEnvironment())
if err != nil {
return "", err
}
return cs.parseSubjectTokenFromSource(output, executableSource, cs.env.now().Unix())
}

57
vendor/golang.org/x/oauth2/google/internal/externalaccount/filecredsource.go generated vendored
View File

@@ -1,57 +0,0 @@
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
)
type fileCredentialSource struct {
File string
Format format
}
func (cs fileCredentialSource) subjectToken() (string, error) {
tokenFile, err := os.Open(cs.File)
if err != nil {
return "", fmt.Errorf("oauth2/google: failed to open credential file %q", cs.File)
}
defer tokenFile.Close()
tokenBytes, err := ioutil.ReadAll(io.LimitReader(tokenFile, 1<<20))
if err != nil {
return "", fmt.Errorf("oauth2/google: failed to read credential file: %v", err)
}
tokenBytes = bytes.TrimSpace(tokenBytes)
switch cs.Format.Type {
case "json":
jsonData := make(map[string]interface{})
err = json.Unmarshal(tokenBytes, &jsonData)
if err != nil {
return "", fmt.Errorf("oauth2/google: failed to unmarshal subject token file: %v", err)
}
val, ok := jsonData[cs.Format.SubjectTokenFieldName]
if !ok {
return "", errors.New("oauth2/google: provided subject_token_field_name not found in credentials")
}
token, ok := val.(string)
if !ok {
return "", errors.New("oauth2/google: improperly formatted subject token")
}
return token, nil
case "text":
return string(tokenBytes), nil
case "":
return string(tokenBytes), nil
default:
return "", errors.New("oauth2/google: invalid credential_source file format type")
}
}

105
vendor/golang.org/x/oauth2/google/internal/externalaccount/impersonate.go generated vendored
View File

@@ -1,105 +0,0 @@
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"time"
"golang.org/x/oauth2"
)
// generateAccesstokenReq is used for service account impersonation
type generateAccessTokenReq struct {
Delegates []string `json:"delegates,omitempty"`
Lifetime string `json:"lifetime,omitempty"`
Scope []string `json:"scope,omitempty"`
}
type impersonateTokenResponse struct {
AccessToken string `json:"accessToken"`
ExpireTime string `json:"expireTime"`
}
// ImpersonateTokenSource uses a source credential, stored in Ts, to request an access token to the provided URL.
// Scopes can be defined when the access token is requested.
type ImpersonateTokenSource struct {
// Ctx is the execution context of the impersonation process
// used to perform http call to the URL. Required
Ctx context.Context
// Ts is the source credential used to generate a token on the
// impersonated service account. Required.
Ts oauth2.TokenSource
// URL is the endpoint to call to generate a token
// on behalf the service account. Required.
URL string
// Scopes that the impersonated credential should have. Required.
Scopes []string
// Delegates are the service account email addresses in a delegation chain.
// Each service account must be granted roles/iam.serviceAccountTokenCreator
// on the next service account in the chain. Optional.
Delegates []string
// TokenLifetimeSeconds is the number of seconds the impersonation token will
// be valid for.
TokenLifetimeSeconds int
}
// Token performs the exchange to get a temporary service account token to allow access to GCP.
func (its ImpersonateTokenSource) Token() (*oauth2.Token, error) {
lifetimeString := "3600s"
if its.TokenLifetimeSeconds != 0 {
lifetimeString = fmt.Sprintf("%ds", its.TokenLifetimeSeconds)
}
reqBody := generateAccessTokenReq{
Lifetime: lifetimeString,
Scope: its.Scopes,
Delegates: its.Delegates,
}
b, err := json.Marshal(reqBody)
if err != nil {
return nil, fmt.Errorf("oauth2/google: unable to marshal request: %v", err)
}
client := oauth2.NewClient(its.Ctx, its.Ts)
req, err := http.NewRequest("POST", its.URL, bytes.NewReader(b))
if err != nil {
return nil, fmt.Errorf("oauth2/google: unable to create impersonation request: %v", err)
}
req = req.WithContext(its.Ctx)
req.Header.Set("Content-Type", "application/json")
resp, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("oauth2/google: unable to generate access token: %v", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return nil, fmt.Errorf("oauth2/google: unable to read body: %v", err)
}
if c := resp.StatusCode; c < 200 || c > 299 {
return nil, fmt.Errorf("oauth2/google: status code %d: %s", c, body)
}
var accessTokenResp impersonateTokenResponse
if err := json.Unmarshal(body, &accessTokenResp); err != nil {
return nil, fmt.Errorf("oauth2/google: unable to parse response: %v", err)
}
expiry, err := time.Parse(time.RFC3339, accessTokenResp.ExpireTime)
if err != nil {
return nil, fmt.Errorf("oauth2/google: unable to parse expiry: %v", err)
}
return &oauth2.Token{
AccessToken: accessTokenResp.AccessToken,
Expiry: expiry,
TokenType: "Bearer",
}, nil
}

107
vendor/golang.org/x/oauth2/google/internal/externalaccount/sts_exchange.go generated vendored
View File

@@ -1,107 +0,0 @@
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strconv"
"strings"
"golang.org/x/oauth2"
)
// exchangeToken performs an oauth2 token exchange with the provided endpoint.
// The first 4 fields are all mandatory. headers can be used to pass additional
// headers beyond the bare minimum required by the token exchange. options can
// be used to pass additional JSON-structured options to the remote server.
func exchangeToken(ctx context.Context, endpoint string, request *stsTokenExchangeRequest, authentication clientAuthentication, headers http.Header, options map[string]interface{}) (*stsTokenExchangeResponse, error) {
client := oauth2.NewClient(ctx, nil)
data := url.Values{}
data.Set("audience", request.Audience)
data.Set("grant_type", "urn:ietf:params:oauth:grant-type:token-exchange")
data.Set("requested_token_type", "urn:ietf:params:oauth:token-type:access_token")
data.Set("subject_token_type", request.SubjectTokenType)
data.Set("subject_token", request.SubjectToken)
data.Set("scope", strings.Join(request.Scope, " "))
if options != nil {
opts, err := json.Marshal(options)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to marshal additional options: %v", err)
}
data.Set("options", string(opts))
}
authentication.InjectAuthentication(data, headers)
encodedData := data.Encode()
req, err := http.NewRequest("POST", endpoint, strings.NewReader(encodedData))
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to properly build http request: %v", err)
}
req = req.WithContext(ctx)
for key, list := range headers {
for _, val := range list {
req.Header.Add(key, val)
}
}
req.Header.Add("Content-Length", strconv.Itoa(len(encodedData)))
resp, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("oauth2/google: invalid response from Secure Token Server: %v", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return nil, err
}
if c := resp.StatusCode; c < 200 || c > 299 {
return nil, fmt.Errorf("oauth2/google: status code %d: %s", c, body)
}
var stsResp stsTokenExchangeResponse
err = json.Unmarshal(body, &stsResp)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to unmarshal response body from Secure Token Server: %v", err)
}
return &stsResp, nil
}
// stsTokenExchangeRequest contains fields necessary to make an oauth2 token exchange.
type stsTokenExchangeRequest struct {
ActingParty struct {
ActorToken string
ActorTokenType string
}
GrantType string
Resource string
Audience string
Scope []string
RequestedTokenType string
SubjectToken string
SubjectTokenType string
}
// stsTokenExchangeResponse is used to decode the remote server response during an oauth2 token exchange.
type stsTokenExchangeResponse struct {
AccessToken string `json:"access_token"`
IssuedTokenType string `json:"issued_token_type"`
TokenType string `json:"token_type"`
ExpiresIn int `json:"expires_in"`
Scope string `json:"scope"`
RefreshToken string `json:"refresh_token"`
}

75
vendor/golang.org/x/oauth2/google/internal/externalaccount/urlcredsource.go generated vendored
View File

@@ -1,75 +0,0 @@
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package externalaccount
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"golang.org/x/oauth2"
)
type urlCredentialSource struct {
URL string
Headers map[string]string
Format format
ctx context.Context
}
func (cs urlCredentialSource) subjectToken() (string, error) {
client := oauth2.NewClient(cs.ctx, nil)
req, err := http.NewRequest("GET", cs.URL, nil)
if err != nil {
return "", fmt.Errorf("oauth2/google: HTTP request for URL-sourced credential failed: %v", err)
}
req = req.WithContext(cs.ctx)
for key, val := range cs.Headers {
req.Header.Add(key, val)
}
resp, err := client.Do(req)
if err != nil {
return "", fmt.Errorf("oauth2/google: invalid response when retrieving subject token: %v", err)
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return "", fmt.Errorf("oauth2/google: invalid body in subject token URL query: %v", err)
}
if c := resp.StatusCode; c < 200 || c > 299 {
return "", fmt.Errorf("oauth2/google: status code %d: %s", c, respBody)
}
switch cs.Format.Type {
case "json":
jsonData := make(map[string]interface{})
err = json.Unmarshal(respBody, &jsonData)
if err != nil {
return "", fmt.Errorf("oauth2/google: failed to unmarshal subject token file: %v", err)
}
val, ok := jsonData[cs.Format.SubjectTokenFieldName]
if !ok {
return "", errors.New("oauth2/google: provided subject_token_field_name not found in credentials")
}
token, ok := val.(string)
if !ok {
return "", errors.New("oauth2/google: improperly formatted subject token")
}
return token, nil
case "text":
return string(respBody), nil
case "":
return string(respBody), nil
default:
return "", errors.New("oauth2/google: invalid credential_source file format type")
}
}

102
vendor/golang.org/x/oauth2/google/jwt.go generated vendored
View File

@@ -1,102 +0,0 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"crypto/rsa"
"fmt"
"strings"
"time"
"golang.org/x/oauth2"
"golang.org/x/oauth2/internal"
"golang.org/x/oauth2/jws"
)
// JWTAccessTokenSourceFromJSON uses a Google Developers service account JSON
// key file to read the credentials that authorize and authenticate the
// requests, and returns a TokenSource that does not use any OAuth2 flow but
// instead creates a JWT and sends that as the access token.
// The audience is typically a URL that specifies the scope of the credentials.
//
// Note that this is not a standard OAuth flow, but rather an
// optimization supported by a few Google services.
// Unless you know otherwise, you should use JWTConfigFromJSON instead.
func JWTAccessTokenSourceFromJSON(jsonKey []byte, audience string) (oauth2.TokenSource, error) {
return newJWTSource(jsonKey, audience, nil)
}
// JWTAccessTokenSourceWithScope uses a Google Developers service account JSON
// key file to read the credentials that authorize and authenticate the
// requests, and returns a TokenSource that does not use any OAuth2 flow but
// instead creates a JWT and sends that as the access token.
// The scope is typically a list of URLs that specifies the scope of the
// credentials.
//
// Note that this is not a standard OAuth flow, but rather an
// optimization supported by a few Google services.
// Unless you know otherwise, you should use JWTConfigFromJSON instead.
func JWTAccessTokenSourceWithScope(jsonKey []byte, scope ...string) (oauth2.TokenSource, error) {
return newJWTSource(jsonKey, "", scope)
}
func newJWTSource(jsonKey []byte, audience string, scopes []string) (oauth2.TokenSource, error) {
if len(scopes) == 0 && audience == "" {
return nil, fmt.Errorf("google: missing scope/audience for JWT access token")
}
cfg, err := JWTConfigFromJSON(jsonKey)
if err != nil {
return nil, fmt.Errorf("google: could not parse JSON key: %v", err)
}
pk, err := internal.ParseKey(cfg.PrivateKey)
if err != nil {
return nil, fmt.Errorf("google: could not parse key: %v", err)
}
ts := &jwtAccessTokenSource{
email: cfg.Email,
audience: audience,
scopes: scopes,
pk: pk,
pkID: cfg.PrivateKeyID,
}
tok, err := ts.Token()
if err != nil {
return nil, err
}
rts := newErrWrappingTokenSource(oauth2.ReuseTokenSource(tok, ts))
return rts, nil
}
type jwtAccessTokenSource struct {
email, audience string
scopes []string
pk *rsa.PrivateKey
pkID string
}
func (ts *jwtAccessTokenSource) Token() (*oauth2.Token, error) {
iat := time.Now()
exp := iat.Add(time.Hour)
scope := strings.Join(ts.scopes, " ")
cs := &jws.ClaimSet{
Iss: ts.email,
Sub: ts.email,
Aud: ts.audience,
Scope: scope,
Iat: iat.Unix(),
Exp: exp.Unix(),
}
hdr := &jws.Header{
Algorithm: "RS256",
Typ: "JWT",
KeyID: string(ts.pkID),
}
msg, err := jws.Encode(hdr, cs, ts.pk)
if err != nil {
return nil, fmt.Errorf("google: could not encode JWT: %v", err)
}
return &oauth2.Token{AccessToken: msg, TokenType: "Bearer", Expiry: exp}, nil
}

201
vendor/golang.org/x/oauth2/google/sdk.go generated vendored
View File

@@ -1,201 +0,0 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"os"
"os/user"
"path/filepath"
"runtime"
"strings"
"time"
"golang.org/x/oauth2"
)
type sdkCredentials struct {
Data []struct {
Credential struct {
ClientID string `json:"client_id"`
ClientSecret string `json:"client_secret"`
AccessToken string `json:"access_token"`
RefreshToken string `json:"refresh_token"`
TokenExpiry *time.Time `json:"token_expiry"`
} `json:"credential"`
Key struct {
Account string `json:"account"`
Scope string `json:"scope"`
} `json:"key"`
}
}
// An SDKConfig provides access to tokens from an account already
// authorized via the Google Cloud SDK.
type SDKConfig struct {
conf oauth2.Config
initialToken *oauth2.Token
}
// NewSDKConfig creates an SDKConfig for the given Google Cloud SDK
// account. If account is empty, the account currently active in
// Google Cloud SDK properties is used.
// Google Cloud SDK credentials must be created by running `gcloud auth`
// before using this function.
// The Google Cloud SDK is available at https://cloud.google.com/sdk/.
func NewSDKConfig(account string) (*SDKConfig, error) {
configPath, err := sdkConfigPath()
if err != nil {
return nil, fmt.Errorf("oauth2/google: error getting SDK config path: %v", err)
}
credentialsPath := filepath.Join(configPath, "credentials")
f, err := os.Open(credentialsPath)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to load SDK credentials: %v", err)
}
defer f.Close()
var c sdkCredentials
if err := json.NewDecoder(f).Decode(&c); err != nil {
return nil, fmt.Errorf("oauth2/google: failed to decode SDK credentials from %q: %v", credentialsPath, err)
}
if len(c.Data) == 0 {
return nil, fmt.Errorf("oauth2/google: no credentials found in %q, run `gcloud auth login` to create one", credentialsPath)
}
if account == "" {
propertiesPath := filepath.Join(configPath, "properties")
f, err := os.Open(propertiesPath)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to load SDK properties: %v", err)
}
defer f.Close()
ini, err := parseINI(f)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to parse SDK properties %q: %v", propertiesPath, err)
}
core, ok := ini["core"]
if !ok {
return nil, fmt.Errorf("oauth2/google: failed to find [core] section in %v", ini)
}
active, ok := core["account"]
if !ok {
return nil, fmt.Errorf("oauth2/google: failed to find %q attribute in %v", "account", core)
}
account = active
}
for _, d := range c.Data {
if account == "" || d.Key.Account == account {
if d.Credential.AccessToken == "" && d.Credential.RefreshToken == "" {
return nil, fmt.Errorf("oauth2/google: no token available for account %q", account)
}
var expiry time.Time
if d.Credential.TokenExpiry != nil {
expiry = *d.Credential.TokenExpiry
}
return &SDKConfig{
conf: oauth2.Config{
ClientID: d.Credential.ClientID,
ClientSecret: d.Credential.ClientSecret,
Scopes: strings.Split(d.Key.Scope, " "),
Endpoint: Endpoint,
RedirectURL: "oob",
},
initialToken: &oauth2.Token{
AccessToken: d.Credential.AccessToken,
RefreshToken: d.Credential.RefreshToken,
Expiry: expiry,
},
}, nil
}
}
return nil, fmt.Errorf("oauth2/google: no such credentials for account %q", account)
}
// Client returns an HTTP client using Google Cloud SDK credentials to
// authorize requests. The token will auto-refresh as necessary. The
// underlying http.RoundTripper will be obtained using the provided
// context. The returned client and its Transport should not be
// modified.
func (c *SDKConfig) Client(ctx context.Context) *http.Client {
return &http.Client{
Transport: &oauth2.Transport{
Source: c.TokenSource(ctx),
},
}
}
// TokenSource returns an oauth2.TokenSource that retrieve tokens from
// Google Cloud SDK credentials using the provided context.
// It will returns the current access token stored in the credentials,
// and refresh it when it expires, but it won't update the credentials
// with the new access token.
func (c *SDKConfig) TokenSource(ctx context.Context) oauth2.TokenSource {
return c.conf.TokenSource(ctx, c.initialToken)
}
// Scopes are the OAuth 2.0 scopes the current account is authorized for.
func (c *SDKConfig) Scopes() []string {
return c.conf.Scopes
}
func parseINI(ini io.Reader) (map[string]map[string]string, error) {
result := map[string]map[string]string{
"": {}, // root section
}
scanner := bufio.NewScanner(ini)
currentSection := ""
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if strings.HasPrefix(line, ";") {
// comment.
continue
}
if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
currentSection = strings.TrimSpace(line[1 : len(line)-1])
result[currentSection] = map[string]string{}
continue
}
parts := strings.SplitN(line, "=", 2)
if len(parts) == 2 && parts[0] != "" {
result[currentSection][strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1])
}
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("error scanning ini: %v", err)
}
return result, nil
}
// sdkConfigPath tries to guess where the gcloud config is located.
// It can be overridden during tests.
var sdkConfigPath = func() (string, error) {
if runtime.GOOS == "windows" {
return filepath.Join(os.Getenv("APPDATA"), "gcloud"), nil
}
homeDir := guessUnixHomeDir()
if homeDir == "" {
return "", errors.New("unable to get current user home directory: os/user lookup failed; $HOME is empty")
}
return filepath.Join(homeDir, ".config", "gcloud"), nil
}
func guessUnixHomeDir() string {
// Prefer $HOME over user.Current due to glibc bug: golang.org/issue/13470
if v := os.Getenv("HOME"); v != "" {
return v
}
// Else, fall back to user.Current:
if u, err := user.Current(); err == nil {
return u.HomeDir
}
return ""
}

4
vendor/golang.org/x/oauth2/internal/token.go generated vendored
View File

@@ -19,8 +19,6 @@ import (
"strings"
"sync"
"time"
"golang.org/x/net/context/ctxhttp"
)
// Token represents the credentials used to authorize
@@ -229,7 +227,7 @@ func RetrieveToken(ctx context.Context, clientID, clientSecret, tokenURL string,
}
func doTokenRoundTrip(ctx context.Context, req *http.Request) (*Token, error) {
r, err := ctxhttp.Do(ctx, ContextClient(ctx), req)
r, err := ContextClient(ctx).Do(req.WithContext(ctx))
if err != nil {
return nil, err
}

182
vendor/golang.org/x/oauth2/jws/jws.go generated vendored
View File

@@ -1,182 +0,0 @@
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package jws provides a partial implementation
// of JSON Web Signature encoding and decoding.
// It exists to support the golang.org/x/oauth2 package.
//
// See RFC 7515.
//
// Deprecated: this package is not intended for public use and might be
// removed in the future. It exists for internal use only.
// Please switch to another JWS package or copy this package into your own
// source tree.
package jws // import "golang.org/x/oauth2/jws"
import (
"bytes"
"crypto"
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"strings"
"time"
)
// ClaimSet contains information about the JWT signature including the
// permissions being requested (scopes), the target of the token, the issuer,
// the time the token was issued, and the lifetime of the token.
type ClaimSet struct {
Iss string `json:"iss"` // email address of the client_id of the application making the access token request
Scope string `json:"scope,omitempty"` // space-delimited list of the permissions the application requests
Aud string `json:"aud"` // descriptor of the intended target of the assertion (Optional).
Exp int64 `json:"exp"` // the expiration time of the assertion (seconds since Unix epoch)
Iat int64 `json:"iat"` // the time the assertion was issued (seconds since Unix epoch)
Typ string `json:"typ,omitempty"` // token type (Optional).
// Email for which the application is requesting delegated access (Optional).
Sub string `json:"sub,omitempty"`
// The old name of Sub. Client keeps setting Prn to be
// complaint with legacy OAuth 2.0 providers. (Optional)
Prn string `json:"prn,omitempty"`
// See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3
// This array is marshalled using custom code (see (c *ClaimSet) encode()).
PrivateClaims map[string]interface{} `json:"-"`
}
func (c *ClaimSet) encode() (string, error) {
// Reverting time back for machines whose time is not perfectly in sync.
// If client machine's time is in the future according
// to Google servers, an access token will not be issued.
now := time.Now().Add(-10 * time.Second)
if c.Iat == 0 {
c.Iat = now.Unix()
}
if c.Exp == 0 {
c.Exp = now.Add(time.Hour).Unix()
}
if c.Exp < c.Iat {
return "", fmt.Errorf("jws: invalid Exp = %v; must be later than Iat = %v", c.Exp, c.Iat)
}
b, err := json.Marshal(c)
if err != nil {
return "", err
}
if len(c.PrivateClaims) == 0 {
return base64.RawURLEncoding.EncodeToString(b), nil
}
// Marshal private claim set and then append it to b.
prv, err := json.Marshal(c.PrivateClaims)
if err != nil {
return "", fmt.Errorf("jws: invalid map of private claims %v", c.PrivateClaims)
}
// Concatenate public and private claim JSON objects.
if !bytes.HasSuffix(b, []byte{'}'}) {
return "", fmt.Errorf("jws: invalid JSON %s", b)
}
if !bytes.HasPrefix(prv, []byte{'{'}) {
return "", fmt.Errorf("jws: invalid JSON %s", prv)
}
b[len(b)-1] = ',' // Replace closing curly brace with a comma.
b = append(b, prv[1:]...) // Append private claims.
return base64.RawURLEncoding.EncodeToString(b), nil
}
// Header represents the header for the signed JWS payloads.
type Header struct {
// The algorithm used for signature.
Algorithm string `json:"alg"`
// Represents the token type.
Typ string `json:"typ"`
// The optional hint of which key is being used.
KeyID string `json:"kid,omitempty"`
}
func (h *Header) encode() (string, error) {
b, err := json.Marshal(h)
if err != nil {
return "", err
}
return base64.RawURLEncoding.EncodeToString(b), nil
}
// Decode decodes a claim set from a JWS payload.
func Decode(payload string) (*ClaimSet, error) {
// decode returned id token to get expiry
s := strings.Split(payload, ".")
if len(s) < 2 {
// TODO(jbd): Provide more context about the error.
return nil, errors.New("jws: invalid token received")
}
decoded, err := base64.RawURLEncoding.DecodeString(s[1])
if err != nil {
return nil, err
}
c := &ClaimSet{}
err = json.NewDecoder(bytes.NewBuffer(decoded)).Decode(c)
return c, err
}
// Signer returns a signature for the given data.
type Signer func(data []byte) (sig []byte, err error)
// EncodeWithSigner encodes a header and claim set with the provided signer.
func EncodeWithSigner(header *Header, c *ClaimSet, sg Signer) (string, error) {
head, err := header.encode()
if err != nil {
return "", err
}
cs, err := c.encode()
if err != nil {
return "", err
}
ss := fmt.Sprintf("%s.%s", head, cs)
sig, err := sg([]byte(ss))
if err != nil {
return "", err
}
return fmt.Sprintf("%s.%s", ss, base64.RawURLEncoding.EncodeToString(sig)), nil
}
// Encode encodes a signed JWS with provided header and claim set.
// This invokes EncodeWithSigner using crypto/rsa.SignPKCS1v15 with the given RSA private key.
func Encode(header *Header, c *ClaimSet, key *rsa.PrivateKey) (string, error) {
sg := func(data []byte) (sig []byte, err error) {
h := sha256.New()
h.Write(data)
return rsa.SignPKCS1v15(rand.Reader, key, crypto.SHA256, h.Sum(nil))
}
return EncodeWithSigner(header, c, sg)
}
// Verify tests whether the provided JWT token's signature was produced by the private key
// associated with the supplied public key.
func Verify(token string, key *rsa.PublicKey) error {
parts := strings.Split(token, ".")
if len(parts) != 3 {
return errors.New("jws: invalid token received, token must have 3 parts")
}
signedContent := parts[0] + "." + parts[1]
signatureString, err := base64.RawURLEncoding.DecodeString(parts[2])
if err != nil {
return err
}
h := sha256.New()
h.Write([]byte(signedContent))
return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), signatureString)
}

185
vendor/golang.org/x/oauth2/jwt/jwt.go generated vendored
View File

@@ -1,185 +0,0 @@
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly
// known as "two-legged OAuth 2.0".
//
// See: https://tools.ietf.org/html/draft-ietf-oauth-jwt-bearer-12
package jwt
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
"time"
"golang.org/x/oauth2"
"golang.org/x/oauth2/internal"
"golang.org/x/oauth2/jws"
)
var (
defaultGrantType = "urn:ietf:params:oauth:grant-type:jwt-bearer"
defaultHeader = &jws.Header{Algorithm: "RS256", Typ: "JWT"}
)
// Config is the configuration for using JWT to fetch tokens,
// commonly known as "two-legged OAuth 2.0".
type Config struct {
// Email is the OAuth client identifier used when communicating with
// the configured OAuth provider.
Email string
// PrivateKey contains the contents of an RSA private key or the
// contents of a PEM file that contains a private key. The provided
// private key is used to sign JWT payloads.
// PEM containers with a passphrase are not supported.
// Use the following command to convert a PKCS 12 file into a PEM.
//
// $ openssl pkcs12 -in key.p12 -out key.pem -nodes
//
PrivateKey []byte
// PrivateKeyID contains an optional hint indicating which key is being
// used.
PrivateKeyID string
// Subject is the optional user to impersonate.
Subject string
// Scopes optionally specifies a list of requested permission scopes.
Scopes []string
// TokenURL is the endpoint required to complete the 2-legged JWT flow.
TokenURL string
// Expires optionally specifies how long the token is valid for.
Expires time.Duration
// Audience optionally specifies the intended audience of the
// request. If empty, the value of TokenURL is used as the
// intended audience.
Audience string
// PrivateClaims optionally specifies custom private claims in the JWT.
// See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3
PrivateClaims map[string]interface{}
// UseIDToken optionally specifies whether ID token should be used instead
// of access token when the server returns both.
UseIDToken bool
}
// TokenSource returns a JWT TokenSource using the configuration
// in c and the HTTP client from the provided context.
func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource {
return oauth2.ReuseTokenSource(nil, jwtSource{ctx, c})
}
// Client returns an HTTP client wrapping the context's
// HTTP transport and adding Authorization headers with tokens
// obtained from c.
//
// The returned client and its Transport should not be modified.
func (c *Config) Client(ctx context.Context) *http.Client {
return oauth2.NewClient(ctx, c.TokenSource(ctx))
}
// jwtSource is a source that always does a signed JWT request for a token.
// It should typically be wrapped with a reuseTokenSource.
type jwtSource struct {
ctx context.Context
conf *Config
}
func (js jwtSource) Token() (*oauth2.Token, error) {
pk, err := internal.ParseKey(js.conf.PrivateKey)
if err != nil {
return nil, err
}
hc := oauth2.NewClient(js.ctx, nil)
claimSet := &jws.ClaimSet{
Iss: js.conf.Email,
Scope: strings.Join(js.conf.Scopes, " "),
Aud: js.conf.TokenURL,
PrivateClaims: js.conf.PrivateClaims,
}
if subject := js.conf.Subject; subject != "" {
claimSet.Sub = subject
// prn is the old name of sub. Keep setting it
// to be compatible with legacy OAuth 2.0 providers.
claimSet.Prn = subject
}
if t := js.conf.Expires; t > 0 {
claimSet.Exp = time.Now().Add(t).Unix()
}
if aud := js.conf.Audience; aud != "" {
claimSet.Aud = aud
}
h := *defaultHeader
h.KeyID = js.conf.PrivateKeyID
payload, err := jws.Encode(&h, claimSet, pk)
if err != nil {
return nil, err
}
v := url.Values{}
v.Set("grant_type", defaultGrantType)
v.Set("assertion", payload)
resp, err := hc.PostForm(js.conf.TokenURL, v)
if err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
if c := resp.StatusCode; c < 200 || c > 299 {
return nil, &oauth2.RetrieveError{
Response: resp,
Body: body,
}
}
// tokenRes is the JSON response body.
var tokenRes struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
IDToken string `json:"id_token"`
ExpiresIn int64 `json:"expires_in"` // relative seconds from now
}
if err := json.Unmarshal(body, &tokenRes); err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
token := &oauth2.Token{
AccessToken: tokenRes.AccessToken,
TokenType: tokenRes.TokenType,
}
raw := make(map[string]interface{})
json.Unmarshal(body, &raw) // no error checks for optional fields
token = token.WithExtra(raw)
if secs := tokenRes.ExpiresIn; secs > 0 {
token.Expiry = time.Now().Add(time.Duration(secs) * time.Second)
}
if v := tokenRes.IDToken; v != "" {
// decode returned id token to get expiry
claimSet, err := jws.Decode(v)
if err != nil {
return nil, fmt.Errorf("oauth2: error decoding JWT token: %v", err)
}
token.Expiry = time.Unix(claimSet.Exp, 0)
}
if js.conf.UseIDToken {
if tokenRes.IDToken == "" {
return nil, fmt.Errorf("oauth2: response doesn't have JWT token")
}
token.AccessToken = tokenRes.IDToken
}
return token, nil
}