diff options
Diffstat (limited to 'vendor/golang.org/x/oauth2/google')
-rw-r--r-- | vendor/golang.org/x/oauth2/google/appengine.go | 38 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/appengine_gen1.go | 77 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/appengine_gen2_flex.go | 27 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/default.go | 155 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/doc.go | 40 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/google.go | 192 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/jwt.go | 74 | ||||
-rw-r--r-- | vendor/golang.org/x/oauth2/google/sdk.go | 201 |
8 files changed, 804 insertions, 0 deletions
diff --git a/vendor/golang.org/x/oauth2/google/appengine.go b/vendor/golang.org/x/oauth2/google/appengine.go new file mode 100644 index 000000000..feb1157b1 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appengine.go @@ -0,0 +1,38 @@ +// 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...) +} diff --git a/vendor/golang.org/x/oauth2/google/appengine_gen1.go b/vendor/golang.org/x/oauth2/google/appengine_gen1.go new file mode 100644 index 000000000..83dacac32 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appengine_gen1.go @@ -0,0 +1,77 @@ +// 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. + +// +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 +} diff --git a/vendor/golang.org/x/oauth2/google/appengine_gen2_flex.go b/vendor/golang.org/x/oauth2/google/appengine_gen2_flex.go new file mode 100644 index 000000000..04c2c2216 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appengine_gen2_flex.go @@ -0,0 +1,27 @@ +// 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. + +// +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("") +} diff --git a/vendor/golang.org/x/oauth2/google/default.go b/vendor/golang.org/x/oauth2/google/default.go new file mode 100644 index 000000000..5087d845f --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/default.go @@ -0,0 +1,155 @@ +// 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" +) + +// Credentials holds Google credentials, including "Application Default Credentials". +// For more details, see: +// https://developers.google.com/accounts/docs/application-default-credentials +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 + +// 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 +} + +// FindDefaultCredentials 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. +// 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. +// (In this final case any provided scopes are ignored.) +func FindDefaultCredentials(ctx context.Context, scopes ...string) (*Credentials, error) { + // First, try the environment variable. + const envVar = "GOOGLE_APPLICATION_CREDENTIALS" + if filename := os.Getenv(envVar); filename != "" { + creds, err := readCredentialsFile(ctx, filename, scopes) + 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, scopes); 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, 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(""), + }, 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) +} + +// CredentialsFromJSON obtains Google credentials from a JSON value. The JSON can +// represent either a Google Developers Console client_credentials.json file (as in +// ConfigFromJSON) or a Google Developers service account key file (as in +// JWTConfigFromJSON). +func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*Credentials, error) { + var f credentialsFile + if err := json.Unmarshal(jsonData, &f); err != nil { + return nil, err + } + ts, err := f.tokenSource(ctx, append([]string(nil), scopes...)) + if err != nil { + return nil, err + } + return &DefaultCredentials{ + ProjectID: f.ProjectID, + TokenSource: ts, + JSON: jsonData, + }, nil +} + +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, scopes []string) (*DefaultCredentials, error) { + b, err := ioutil.ReadFile(filename) + if err != nil { + return nil, err + } + return CredentialsFromJSON(ctx, b, scopes...) +} diff --git a/vendor/golang.org/x/oauth2/google/doc.go b/vendor/golang.org/x/oauth2/google/doc.go new file mode 100644 index 000000000..73be62903 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/doc.go @@ -0,0 +1,40 @@ +// 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, and Google +// App Engine service accounts. +// +// 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. +// +// 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. +// +// +// 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. +// +// 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" diff --git a/vendor/golang.org/x/oauth2/google/google.go b/vendor/golang.org/x/oauth2/google/google.go new file mode 100644 index 000000000..ca7d208d7 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/google.go @@ -0,0 +1,192 @@ +// 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" + "strings" + "time" + + "cloud.google.com/go/compute/metadata" + "golang.org/x/oauth2" + "golang.org/x/oauth2/jwt" +) + +// Endpoint is Google's OAuth 2.0 endpoint. +var Endpoint = oauth2.Endpoint{ + AuthURL: "https://accounts.google.com/o/oauth2/auth", + TokenURL: "https://accounts.google.com/o/oauth2/token", +} + +// JWTTokenURL is Google's OAuth 2.0 token URL to use with the JWT flow. +const JWTTokenURL = "https://accounts.google.com/o/oauth2/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" +) + +// credentialsFile is the unmarshalled representation of a credentials file. +type credentialsFile struct { + Type string `json:"type"` // serviceAccountKey or userCredentialsKey + + // Service Account fields + ClientEmail string `json:"client_email"` + PrivateKeyID string `json:"private_key_id"` + PrivateKey string `json:"private_key"` + 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"` +} + +func (f *credentialsFile) jwtConfig(scopes []string) *jwt.Config { + cfg := &jwt.Config{ + Email: f.ClientEmail, + PrivateKey: []byte(f.PrivateKey), + PrivateKeyID: f.PrivateKeyID, + Scopes: scopes, + TokenURL: f.TokenURL, + } + if cfg.TokenURL == "" { + cfg.TokenURL = JWTTokenURL + } + return cfg +} + +func (f *credentialsFile) tokenSource(ctx context.Context, scopes []string) (oauth2.TokenSource, error) { + switch f.Type { + case serviceAccountKey: + cfg := f.jwtConfig(scopes) + return cfg.TokenSource(ctx), nil + case userCredentialsKey: + cfg := &oauth2.Config{ + ClientID: f.ClientID, + ClientSecret: f.ClientSecret, + Scopes: scopes, + Endpoint: Endpoint, + } + tok := &oauth2.Token{RefreshToken: f.RefreshToken} + return cfg.TokenSource(ctx, tok), 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. +// 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) oauth2.TokenSource { + return oauth2.ReuseTokenSource(nil, computeSource{account: account}) +} + +type computeSource struct { + account 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" + } + tokenJSON, err := metadata.Get("instance/service-accounts/" + acct + "/token") + 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") + } + return &oauth2.Token{ + AccessToken: res.AccessToken, + TokenType: res.TokenType, + Expiry: time.Now().Add(time.Duration(res.ExpiresInSec) * time.Second), + }, nil +} diff --git a/vendor/golang.org/x/oauth2/google/jwt.go b/vendor/golang.org/x/oauth2/google/jwt.go new file mode 100644 index 000000000..b0fdb3a88 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/jwt.go @@ -0,0 +1,74 @@ +// 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" + "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) { + 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, + pk: pk, + pkID: cfg.PrivateKeyID, + } + tok, err := ts.Token() + if err != nil { + return nil, err + } + return oauth2.ReuseTokenSource(tok, ts), nil +} + +type jwtAccessTokenSource struct { + email, audience string + pk *rsa.PrivateKey + pkID string +} + +func (ts *jwtAccessTokenSource) Token() (*oauth2.Token, error) { + iat := time.Now() + exp := iat.Add(time.Hour) + cs := &jws.ClaimSet{ + Iss: ts.email, + Sub: ts.email, + Aud: ts.audience, + 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 +} diff --git a/vendor/golang.org/x/oauth2/google/sdk.go b/vendor/golang.org/x/oauth2/google/sdk.go new file mode 100644 index 000000000..456224bc7 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/sdk.go @@ -0,0 +1,201 @@ +// 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 "" +} |