diff options
Diffstat (limited to 'vendor/golang.org/x/oauth2')
22 files changed, 2163 insertions, 0 deletions
diff --git a/vendor/golang.org/x/oauth2/AUTHORS b/vendor/golang.org/x/oauth2/AUTHORS new file mode 100644 index 0000000..15167cd --- /dev/null +++ b/vendor/golang.org/x/oauth2/AUTHORS @@ -0,0 +1,3 @@ +# This source code refers to The Go Authors for copyright purposes. +# The master list of authors is in the main Go distribution, +# visible at http://tip.golang.org/AUTHORS. diff --git a/vendor/golang.org/x/oauth2/CONTRIBUTING.md b/vendor/golang.org/x/oauth2/CONTRIBUTING.md new file mode 100644 index 0000000..46aa2b1 --- /dev/null +++ b/vendor/golang.org/x/oauth2/CONTRIBUTING.md @@ -0,0 +1,31 @@ +# Contributing to Go + +Go is an open source project. + +It is the work of hundreds of contributors. We appreciate your help! + + +## Filing issues + +When [filing an issue](https://github.com/golang/oauth2/issues), make sure to answer these five questions: + +1. What version of Go are you using (`go version`)? +2. What operating system and processor architecture are you using? +3. What did you do? +4. What did you expect to see? +5. What did you see instead? + +General questions should go to the [golang-nuts mailing list](https://groups.google.com/group/golang-nuts) instead of the issue tracker. +The gophers there will answer or ask you to file an issue if you've tripped over a bug. + +## Contributing code + +Please read the [Contribution Guidelines](https://golang.org/doc/contribute.html) +before sending patches. + +**We do not accept GitHub pull requests** +(we use [Gerrit](https://code.google.com/p/gerrit/) instead for code review). + +Unless otherwise noted, the Go source files are distributed under +the BSD-style license found in the LICENSE file. + diff --git a/vendor/golang.org/x/oauth2/CONTRIBUTORS b/vendor/golang.org/x/oauth2/CONTRIBUTORS new file mode 100644 index 0000000..1c4577e --- /dev/null +++ b/vendor/golang.org/x/oauth2/CONTRIBUTORS @@ -0,0 +1,3 @@ +# This source code was written by the Go contributors. +# The master list of contributors is in the main Go distribution, +# visible at http://tip.golang.org/CONTRIBUTORS. diff --git a/vendor/golang.org/x/oauth2/LICENSE b/vendor/golang.org/x/oauth2/LICENSE new file mode 100644 index 0000000..d02f24f --- /dev/null +++ b/vendor/golang.org/x/oauth2/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The oauth2 Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/golang.org/x/oauth2/README.md b/vendor/golang.org/x/oauth2/README.md new file mode 100644 index 0000000..0d51417 --- /dev/null +++ b/vendor/golang.org/x/oauth2/README.md @@ -0,0 +1,64 @@ +# OAuth2 for Go + +[](https://travis-ci.org/golang/oauth2) + +oauth2 package contains a client implementation for OAuth 2.0 spec. + +## Installation + +~~~~ +go get golang.org/x/oauth2 +~~~~ + +See godoc for further documentation and examples. + +* [godoc.org/golang.org/x/oauth2](http://godoc.org/golang.org/x/oauth2) +* [godoc.org/golang.org/x/oauth2/google](http://godoc.org/golang.org/x/oauth2/google) + + +## App Engine + +In change 96e89be (March 2015) we removed the `oauth2.Context2` type in favor +of the [`context.Context`](https://golang.org/x/net/context#Context) type from +the `golang.org/x/net/context` package + +This means its no longer possible to use the "Classic App Engine" +`appengine.Context` type with the `oauth2` package. (You're using +Classic App Engine if you import the package `"appengine"`.) + +To work around this, you may use the new `"google.golang.org/appengine"` +package. This package has almost the same API as the `"appengine"` package, +but it can be fetched with `go get` and used on "Managed VMs" and well as +Classic App Engine. + +See the [new `appengine` package's readme](https://github.com/golang/appengine#updating-a-go-app-engine-app) +for information on updating your app. + +If you don't want to update your entire app to use the new App Engine packages, +you may use both sets of packages in parallel, using only the new packages +with the `oauth2` package. + + import ( + "golang.org/x/net/context" + "golang.org/x/oauth2" + "golang.org/x/oauth2/google" + newappengine "google.golang.org/appengine" + newurlfetch "google.golang.org/appengine/urlfetch" + + "appengine" + ) + + func handler(w http.ResponseWriter, r *http.Request) { + var c appengine.Context = appengine.NewContext(r) + c.Infof("Logging a message with the old package") + + var ctx context.Context = newappengine.NewContext(r) + client := &http.Client{ + Transport: &oauth2.Transport{ + Source: google.AppEngineTokenSource(ctx, "scope"), + Base: &newurlfetch.Transport{Context: ctx}, + }, + } + client.Get("...") + } + diff --git a/vendor/golang.org/x/oauth2/client_appengine.go b/vendor/golang.org/x/oauth2/client_appengine.go new file mode 100644 index 0000000..8962c49 --- /dev/null +++ b/vendor/golang.org/x/oauth2/client_appengine.go @@ -0,0 +1,25 @@ +// 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. + +// +build appengine + +// App Engine hooks. + +package oauth2 + +import ( + "net/http" + + "golang.org/x/net/context" + "golang.org/x/oauth2/internal" + "google.golang.org/appengine/urlfetch" +) + +func init() { + internal.RegisterContextClientFunc(contextClientAppEngine) +} + +func contextClientAppEngine(ctx context.Context) (*http.Client, error) { + return urlfetch.Client(ctx), nil +} diff --git a/vendor/golang.org/x/oauth2/github/github.go b/vendor/golang.org/x/oauth2/github/github.go new file mode 100644 index 0000000..f297801 --- /dev/null +++ b/vendor/golang.org/x/oauth2/github/github.go @@ -0,0 +1,16 @@ +// 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 github provides constants for using OAuth2 to access Github. +package github // import "golang.org/x/oauth2/github" + +import ( + "golang.org/x/oauth2" +) + +// Endpoint is Github's OAuth 2.0 endpoint. +var Endpoint = oauth2.Endpoint{ + AuthURL: "https://github.com/login/oauth/authorize", + TokenURL: "https://github.com/login/oauth/access_token", +} 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 0000000..dc993ef --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appengine.go @@ -0,0 +1,86 @@ +// 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 ( + "sort" + "strings" + "sync" + "time" + + "golang.org/x/net/context" + "golang.org/x/oauth2" +) + +// Set at init time by appenginevm_hook.go. If true, we are on App Engine Managed VMs. +var appengineVM bool + +// Set at init time by appengine_hook.go. If nil, we're not on App Engine. +var appengineTokenFunc func(c context.Context, scopes ...string) (token string, expiry time.Time, err error) + +// AppEngineTokenSource returns a token source that fetches tokens +// issued to the current App Engine application's service account. +// If you are implementing a 3-legged OAuth 2.0 flow on App Engine +// that involves user accounts, see oauth2.Config instead. +// +// The provided context must have come from appengine.NewContext. +func AppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource { + if appengineTokenFunc == nil { + panic("google: AppEngineTokenSource can only be used on App Engine.") + } + scopes := append([]string{}, scope...) + sort.Strings(scopes) + return &appEngineTokenSource{ + 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 appEngineTokenSource struct { + ctx context.Context + scopes []string + key string // to aeTokens map; space-separated scopes +} + +func (ts *appEngineTokenSource) Token() (*oauth2.Token, error) { + if appengineTokenFunc == nil { + panic("google: AppEngineTokenSource can only be used on App Engine.") + } + + 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_hook.go b/vendor/golang.org/x/oauth2/google/appengine_hook.go new file mode 100644 index 0000000..4f42c8b --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appengine_hook.go @@ -0,0 +1,13 @@ +// 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. + +// +build appengine + +package google + +import "google.golang.org/appengine" + +func init() { + appengineTokenFunc = appengine.AccessToken +} diff --git a/vendor/golang.org/x/oauth2/google/appenginevm_hook.go b/vendor/golang.org/x/oauth2/google/appenginevm_hook.go new file mode 100644 index 0000000..633611c --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appenginevm_hook.go @@ -0,0 +1,14 @@ +// Copyright 2015 The oauth2 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 appenginevm + +package google + +import "google.golang.org/appengine" + +func init() { + appengineVM = true + appengineTokenFunc = appengine.AccessToken +} 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 0000000..b952362 --- /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 ( + "encoding/json" + "errors" + "fmt" + "io/ioutil" + "net/http" + "os" + "path/filepath" + "runtime" + + "golang.org/x/net/context" + "golang.org/x/oauth2" + "golang.org/x/oauth2/jwt" + "google.golang.org/cloud/compute/metadata" +) + +// DefaultClient returns an HTTP Client that uses the +// DefaultTokenSource to obtain authentication credentials. +// +// This client should be used when developing services +// that run on Google App Engine or Google Compute Engine +// and use "Application Default Credentials." +// +// For more details, see: +// https://developers.google.com/accounts/docs/application-default-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 is a token source that uses +// "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 it uses the appengine.AccessToken function. +// 4. On Google Compute Engine and Google App Engine Managed VMs, it fetches +// credentials from the metadata server. +// (In this final case any provided scopes are ignored.) +// +// For more details, see: +// https://developers.google.com/accounts/docs/application-default-credentials +// +func DefaultTokenSource(ctx context.Context, scope ...string) (oauth2.TokenSource, error) { + // First, try the environment variable. + const envVar = "GOOGLE_APPLICATION_CREDENTIALS" + if filename := os.Getenv(envVar); filename != "" { + ts, err := tokenSourceFromFile(ctx, filename, scope) + if err != nil { + return nil, fmt.Errorf("google: error getting credentials using %v environment variable: %v", envVar, err) + } + return ts, nil + } + + // Second, try a well-known file. + filename := wellKnownFile() + _, err := os.Stat(filename) + if err == nil { + ts, err2 := tokenSourceFromFile(ctx, filename, scope) + if err2 == nil { + return ts, nil + } + err = err2 + } else if os.IsNotExist(err) { + err = nil // ignore this error + } + if err != nil { + return nil, fmt.Errorf("google: error getting credentials using well-known file (%v): %v", filename, err) + } + + // Third, if we're on Google App Engine use those credentials. + if appengineTokenFunc != nil && !appengineVM { + return AppEngineTokenSource(ctx, scope...), nil + } + + // Fourth, if we're on Google Compute Engine use the metadata server. + if metadata.OnGCE() { + return 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) +} + +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 tokenSourceFromFile(ctx context.Context, filename string, scopes []string) (oauth2.TokenSource, error) { + b, err := ioutil.ReadFile(filename) + if err != nil { + return nil, err + } + var d struct { + // Common fields + Type string + ClientID string `json:"client_id"` + + // User Credential fields + ClientSecret string `json:"client_secret"` + RefreshToken string `json:"refresh_token"` + + // Service Account fields + ClientEmail string `json:"client_email"` + PrivateKeyID string `json:"private_key_id"` + PrivateKey string `json:"private_key"` + } + if err := json.Unmarshal(b, &d); err != nil { + return nil, err + } + switch d.Type { + case "authorized_user": + cfg := &oauth2.Config{ + ClientID: d.ClientID, + ClientSecret: d.ClientSecret, + Scopes: append([]string{}, scopes...), // copy + Endpoint: Endpoint, + } + tok := &oauth2.Token{RefreshToken: d.RefreshToken} + return cfg.TokenSource(ctx, tok), nil + case "service_account": + cfg := &jwt.Config{ + Email: d.ClientEmail, + PrivateKey: []byte(d.PrivateKey), + Scopes: append([]string{}, scopes...), // copy + TokenURL: JWTTokenURL, + } + return cfg.TokenSource(ctx), nil + case "": + return nil, errors.New("missing 'type' field in credentials") + default: + return nil, fmt.Errorf("unknown credential type: %q", d.Type) + } +} 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 0000000..464c75a --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/google.go @@ -0,0 +1,146 @@ +// 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 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. +// +// For more information, please read +// https://developers.google.com/accounts/docs/OAuth2 +// and +// https://developers.google.com/accounts/docs/application-default-credentials. +package google // import "golang.org/x/oauth2/google" + +import ( + "encoding/json" + "errors" + "fmt" + "strings" + "time" + + "golang.org/x/oauth2" + "golang.org/x/oauth2/jwt" + "google.golang.org/cloud/compute/metadata" +) + +// 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 key struct { + Email string `json:"client_email"` + PrivateKey string `json:"private_key"` + } + if err := json.Unmarshal(jsonKey, &key); err != nil { + return nil, err + } + return &jwt.Config{ + Email: key.Email, + PrivateKey: []byte(key.PrivateKey), + Scopes: scope, + TokenURL: JWTTokenURL, + }, nil +} + +// 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 0000000..b919917 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/jwt.go @@ -0,0 +1,71 @@ +// 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, + } + 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 +} + +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", + } + 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 0000000..d29a3bb --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/sdk.go @@ -0,0 +1,168 @@ +// 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 ( + "encoding/json" + "errors" + "fmt" + "net/http" + "os" + "os/user" + "path/filepath" + "runtime" + "strings" + "time" + + "golang.org/x/net/context" + "golang.org/x/oauth2" + "golang.org/x/oauth2/internal" +) + +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 := internal.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 +} + +// 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 { + usr, err := user.Current() + if err == nil { + return usr.HomeDir + } + return os.Getenv("HOME") +} diff --git a/vendor/golang.org/x/oauth2/internal/oauth2.go b/vendor/golang.org/x/oauth2/internal/oauth2.go new file mode 100644 index 0000000..fbe1028 --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/oauth2.go @@ -0,0 +1,76 @@ +// 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 internal contains support packages for oauth2 package. +package internal + +import ( + "bufio" + "crypto/rsa" + "crypto/x509" + "encoding/pem" + "errors" + "fmt" + "io" + "strings" +) + +// ParseKey converts the binary contents of a private key file +// to an *rsa.PrivateKey. It detects whether the private key is in a +// PEM container or not. If so, it extracts the the private key +// from PEM container before conversion. It only supports PEM +// containers with no passphrase. +func ParseKey(key []byte) (*rsa.PrivateKey, error) { + block, _ := pem.Decode(key) + if block != nil { + key = block.Bytes + } + parsedKey, err := x509.ParsePKCS8PrivateKey(key) + if err != nil { + parsedKey, err = x509.ParsePKCS1PrivateKey(key) + if err != nil { + return nil, fmt.Errorf("private key should be a PEM or plain PKSC1 or PKCS8; parse error: %v", err) + } + } + parsed, ok := parsedKey.(*rsa.PrivateKey) + if !ok { + return nil, errors.New("private key is invalid") + } + return parsed, nil +} + +func ParseINI(ini io.Reader) (map[string]map[string]string, error) { + result := map[string]map[string]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 +} + +func CondVal(v string) []string { + if v == "" { + return nil + } + return []string{v} +} diff --git a/vendor/golang.org/x/oauth2/internal/token.go b/vendor/golang.org/x/oauth2/internal/token.go new file mode 100644 index 0000000..a6ed3cc --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/token.go @@ -0,0 +1,225 @@ +// 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 internal contains support packages for oauth2 package. +package internal + +import ( + "encoding/json" + "fmt" + "io" + "io/ioutil" + "mime" + "net/http" + "net/url" + "strconv" + "strings" + "time" + + "golang.org/x/net/context" +) + +// Token represents the crendentials used to authorize +// the requests to access protected resources on the OAuth 2.0 +// provider's backend. +// +// This type is a mirror of oauth2.Token and exists to break +// an otherwise-circular dependency. Other internal packages +// should convert this Token into an oauth2.Token before use. +type Token struct { + // AccessToken is the token that authorizes and authenticates + // the requests. + AccessToken string + + // TokenType is the type of token. + // The Type method returns either this or "Bearer", the default. + TokenType string + + // RefreshToken is a token that's used by the application + // (as opposed to the user) to refresh the access token + // if it expires. + RefreshToken string + + // Expiry is the optional expiration time of the access token. + // + // If zero, TokenSource implementations will reuse the same + // token forever and RefreshToken or equivalent + // mechanisms for that TokenSource will not be used. + Expiry time.Time + + // Raw optionally contains extra metadata from the server + // when updating a token. + Raw interface{} +} + +// tokenJSON is the struct representing the HTTP response from OAuth2 +// providers returning a token in JSON form. +type tokenJSON struct { + AccessToken string `json:"access_token"` + TokenType string `json:"token_type"` + RefreshToken string `json:"refresh_token"` + ExpiresIn expirationTime `json:"expires_in"` // at least PayPal returns string, while most return number + Expires expirationTime `json:"expires"` // broken Facebook spelling of expires_in +} + +func (e *tokenJSON) expiry() (t time.Time) { + if v := e.ExpiresIn; v != 0 { + return time.Now().Add(time.Duration(v) * time.Second) + } + if v := e.Expires; v != 0 { + return time.Now().Add(time.Duration(v) * time.Second) + } + return +} + +type expirationTime int32 + +func (e *expirationTime) UnmarshalJSON(b []byte) error { + var n json.Number + err := json.Unmarshal(b, &n) + if err != nil { + return err + } + i, err := n.Int64() + if err != nil { + return err + } + *e = expirationTime(i) + return nil +} + +var brokenAuthHeaderProviders = []string{ + "https://accounts.google.com/", + "https://api.dropbox.com/", + "https://api.dropboxapi.com/", + "https://api.instagram.com/", + "https://api.netatmo.net/", + "https://api.odnoklassniki.ru/", + "https://api.pushbullet.com/", + "https://api.soundcloud.com/", + "https://api.twitch.tv/", + "https://app.box.com/", + "https://connect.stripe.com/", + "https://login.microsoftonline.com/", + "https://login.salesforce.com/", + "https://oauth.sandbox.trainingpeaks.com/", + "https://oauth.trainingpeaks.com/", + "https://oauth.vk.com/", + "https://openapi.baidu.com/", + "https://slack.com/", + "https://test-sandbox.auth.corp.google.com", + "https://test.salesforce.com/", + "https://user.gini.net/", + "https://www.douban.com/", + "https://www.googleapis.com/", + "https://www.linkedin.com/", + "https://www.strava.com/oauth/", + "https://www.wunderlist.com/oauth/", + "https://api.patreon.com/", +} + +func RegisterBrokenAuthHeaderProvider(tokenURL string) { + brokenAuthHeaderProviders = append(brokenAuthHeaderProviders, tokenURL) +} + +// providerAuthHeaderWorks reports whether the OAuth2 server identified by the tokenURL +// implements the OAuth2 spec correctly +// See https://code.google.com/p/goauth2/issues/detail?id=31 for background. +// In summary: +// - Reddit only accepts client secret in the Authorization header +// - Dropbox accepts either it in URL param or Auth header, but not both. +// - Google only accepts URL param (not spec compliant?), not Auth header +// - Stripe only accepts client secret in Auth header with Bearer method, not Basic +func providerAuthHeaderWorks(tokenURL string) bool { + for _, s := range brokenAuthHeaderProviders { + if strings.HasPrefix(tokenURL, s) { + // Some sites fail to implement the OAuth2 spec fully. + return false + } + } + + // Assume the provider implements the spec properly + // otherwise. We can add more exceptions as they're + // discovered. We will _not_ be adding configurable hooks + // to this package to let users select server bugs. + return true +} + +func RetrieveToken(ctx context.Context, ClientID, ClientSecret, TokenURL string, v url.Values) (*Token, error) { + hc, err := ContextClient(ctx) + if err != nil { + return nil, err + } + v.Set("client_id", ClientID) + bustedAuth := !providerAuthHeaderWorks(TokenURL) + if bustedAuth && ClientSecret != "" { + v.Set("client_secret", ClientSecret) + } + req, err := http.NewRequest("POST", TokenURL, strings.NewReader(v.Encode())) + if err != nil { + return nil, err + } + req.Header.Set("Content-Type", "application/x-www-form-urlencoded") + if !bustedAuth { + req.SetBasicAuth(ClientID, ClientSecret) + } + r, err := hc.Do(req) + if err != nil { + return nil, err + } + defer r.Body.Close() + body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1<<20)) + if err != nil { + return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err) + } + if code := r.StatusCode; code < 200 || code > 299 { + return nil, fmt.Errorf("oauth2: cannot fetch token: %v\nResponse: %s", r.Status, body) + } + + var token *Token + content, _, _ := mime.ParseMediaType(r.Header.Get("Content-Type")) + switch content { + case "application/x-www-form-urlencoded", "text/plain": + vals, err := url.ParseQuery(string(body)) + if err != nil { + return nil, err + } + token = &Token{ + AccessToken: vals.Get("access_token"), + TokenType: vals.Get("token_type"), + RefreshToken: vals.Get("refresh_token"), + Raw: vals, + } + e := vals.Get("expires_in") + if e == "" { + // TODO(jbd): Facebook's OAuth2 implementation is broken and + // returns expires_in field in expires. Remove the fallback to expires, + // when Facebook fixes their implementation. + e = vals.Get("expires") + } + expires, _ := strconv.Atoi(e) + if expires != 0 { + token.Expiry = time.Now().Add(time.Duration(expires) * time.Second) + } + default: + var tj tokenJSON + if err = json.Unmarshal(body, &tj); err != nil { + return nil, err + } + token = &Token{ + AccessToken: tj.AccessToken, + TokenType: tj.TokenType, + RefreshToken: tj.RefreshToken, + Expiry: tj.expiry(), + Raw: make(map[string]interface{}), + } + json.Unmarshal(body, &token.Raw) // no error checks for optional fields + } + // Don't overwrite `RefreshToken` with an empty value + // if this was a token refreshing request. + if token.RefreshToken == "" { + token.RefreshToken = v.Get("refresh_token") + } + return token, nil +} diff --git a/vendor/golang.org/x/oauth2/internal/transport.go b/vendor/golang.org/x/oauth2/internal/transport.go new file mode 100644 index 0000000..f1f173e --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/transport.go @@ -0,0 +1,69 @@ +// 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 internal contains support packages for oauth2 package. +package internal + +import ( + "net/http" + + "golang.org/x/net/context" +) + +// HTTPClient is the context key to use with golang.org/x/net/context's +// WithValue function to associate an *http.Client value with a context. +var HTTPClient ContextKey + +// ContextKey is just an empty struct. It exists so HTTPClient can be +// an immutable public variable with a unique type. It's immutable +// because nobody else can create a ContextKey, being unexported. +type ContextKey struct{} + +// ContextClientFunc is a func which tries to return an *http.Client +// given a Context value. If it returns an error, the search stops +// with that error. If it returns (nil, nil), the search continues +// down the list of registered funcs. +type ContextClientFunc func(context.Context) (*http.Client, error) + +var contextClientFuncs []ContextClientFunc + +func RegisterContextClientFunc(fn ContextClientFunc) { + contextClientFuncs = append(contextClientFuncs, fn) +} + +func ContextClient(ctx context.Context) (*http.Client, error) { + if ctx != nil { + if hc, ok := ctx.Value(HTTPClient).(*http.Client); ok { + return hc, nil + } + } + for _, fn := range contextClientFuncs { + c, err := fn(ctx) + if err != nil { + return nil, err + } + if c != nil { + return c, nil + } + } + return http.DefaultClient, nil +} + +func ContextTransport(ctx context.Context) http.RoundTripper { + hc, err := ContextClient(ctx) + // This is a rare error case (somebody using nil on App Engine). + if err != nil { + return ErrorTransport{err} + } + return hc.Transport +} + +// ErrorTransport returns the specified error on RoundTrip. +// This RoundTripper should be used in rare error cases where +// error handling can be postponed to response handling time. +type ErrorTransport struct{ Err error } + +func (t ErrorTransport) RoundTrip(*http.Request) (*http.Response, error) { + return nil, t.Err +} diff --git a/vendor/golang.org/x/oauth2/jws/jws.go b/vendor/golang.org/x/oauth2/jws/jws.go new file mode 100644 index 0000000..29887ea --- /dev/null +++ b/vendor/golang.org/x/oauth2/jws/jws.go @@ -0,0 +1,191 @@ +// 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 encoding and decoding utilities for +// signed JWS messages. +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 base64Encode(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 base64Encode(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"` +} + +func (h *Header) encode() (string, error) { + b, err := json.Marshal(h) + if err != nil { + return "", err + } + return base64Encode(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 := base64Decode(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, base64Encode(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 := base64Decode(parts[2]) + if err != nil { + return err + } + + h := sha256.New() + h.Write([]byte(signedContent)) + return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), []byte(signatureString)) +} + +// base64Encode returns and Base64url encoded version of the input string with any +// trailing "=" stripped. +func base64Encode(b []byte) string { + return strings.TrimRight(base64.URLEncoding.EncodeToString(b), "=") +} + +// base64Decode decodes the Base64url encoded string +func base64Decode(s string) ([]byte, error) { + // add back missing padding + switch len(s) % 4 { + case 1: + s += "===" + case 2: + s += "==" + case 3: + s += "=" + } + return base64.URLEncoding.DecodeString(s) +} diff --git a/vendor/golang.org/x/oauth2/jwt/jwt.go b/vendor/golang.org/x/oauth2/jwt/jwt.go new file mode 100644 index 0000000..2ffad21 --- /dev/null +++ b/vendor/golang.org/x/oauth2/jwt/jwt.go @@ -0,0 +1,153 @@ +// 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 ( + "encoding/json" + "fmt" + "io" + "io/ioutil" + "net/http" + "net/url" + "strings" + "time" + + "golang.org/x/net/context" + "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 + + // 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 +} + +// 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, + } + 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() + } + payload, err := jws.Encode(defaultHeader, 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, fmt.Errorf("oauth2: cannot fetch token: %v\nResponse: %s", resp.Status, 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) + } + return token, nil +} diff --git a/vendor/golang.org/x/oauth2/oauth2.go b/vendor/golang.org/x/oauth2/oauth2.go new file mode 100644 index 0000000..a682896 --- /dev/null +++ b/vendor/golang.org/x/oauth2/oauth2.go @@ -0,0 +1,337 @@ +// 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 oauth2 provides support for making +// OAuth2 authorized and authenticated HTTP requests. +// It can additionally grant authorization with Bearer JWT. +package oauth2 // import "golang.org/x/oauth2" + +import ( + "bytes" + "errors" + "net/http" + "net/url" + "strings" + "sync" + + "golang.org/x/net/context" + "golang.org/x/oauth2/internal" +) + +// NoContext is the default context you should supply if not using +// your own context.Context (see https://golang.org/x/net/context). +var NoContext = context.TODO() + +// RegisterBrokenAuthHeaderProvider registers an OAuth2 server +// identified by the tokenURL prefix as an OAuth2 implementation +// which doesn't support the HTTP Basic authentication +// scheme to authenticate with the authorization server. +// Once a server is registered, credentials (client_id and client_secret) +// will be passed as query parameters rather than being present +// in the Authorization header. +// See https://code.google.com/p/goauth2/issues/detail?id=31 for background. +func RegisterBrokenAuthHeaderProvider(tokenURL string) { + internal.RegisterBrokenAuthHeaderProvider(tokenURL) +} + +// Config describes a typical 3-legged OAuth2 flow, with both the +// client application information and the server's endpoint URLs. +type Config struct { + // ClientID is the application's ID. + ClientID string + + // ClientSecret is the application's secret. + ClientSecret string + + // Endpoint contains the resource server's token endpoint + // URLs. These are constants specific to each server and are + // often available via site-specific packages, such as + // google.Endpoint or github.Endpoint. + Endpoint Endpoint + + // RedirectURL is the URL to redirect users going through + // the OAuth flow, after the resource owner's URLs. + RedirectURL string + + // Scope specifies optional requested permissions. + Scopes []string +} + +// A TokenSource is anything that can return a token. +type TokenSource interface { + // Token returns a token or an error. + // Token must be safe for concurrent use by multiple goroutines. + // The returned Token must not be modified. + Token() (*Token, error) +} + +// Endpoint contains the OAuth 2.0 provider's authorization and token +// endpoint URLs. +type Endpoint struct { + AuthURL string + TokenURL string +} + +var ( + // AccessTypeOnline and AccessTypeOffline are options passed + // to the Options.AuthCodeURL method. They modify the + // "access_type" field that gets sent in the URL returned by + // AuthCodeURL. + // + // Online is the default if neither is specified. If your + // application needs to refresh access tokens when the user + // is not present at the browser, then use offline. This will + // result in your application obtaining a refresh token the + // first time your application exchanges an authorization + // code for a user. + AccessTypeOnline AuthCodeOption = SetAuthURLParam("access_type", "online") + AccessTypeOffline AuthCodeOption = SetAuthURLParam("access_type", "offline") + + // ApprovalForce forces the users to view the consent dialog + // and confirm the permissions request at the URL returned + // from AuthCodeURL, even if they've already done so. + ApprovalForce AuthCodeOption = SetAuthURLParam("approval_prompt", "force") +) + +// An AuthCodeOption is passed to Config.AuthCodeURL. +type AuthCodeOption interface { + setValue(url.Values) +} + +type setParam struct{ k, v string } + +func (p setParam) setValue(m url.Values) { m.Set(p.k, p.v) } + +// SetAuthURLParam builds an AuthCodeOption which passes key/value parameters +// to a provider's authorization endpoint. +func SetAuthURLParam(key, value string) AuthCodeOption { + return setParam{key, value} +} + +// AuthCodeURL returns a URL to OAuth 2.0 provider's consent page +// that asks for permissions for the required scopes explicitly. +// +// State is a token to protect the user from CSRF attacks. You must +// always provide a non-zero string and validate that it matches the +// the state query parameter on your redirect callback. +// See http://tools.ietf.org/html/rfc6749#section-10.12 for more info. +// +// Opts may include AccessTypeOnline or AccessTypeOffline, as well +// as ApprovalForce. +func (c *Config) AuthCodeURL(state string, opts ...AuthCodeOption) string { + var buf bytes.Buffer + buf.WriteString(c.Endpoint.AuthURL) + v := url.Values{ + "response_type": {"code"}, + "client_id": {c.ClientID}, + "redirect_uri": internal.CondVal(c.RedirectURL), + "scope": internal.CondVal(strings.Join(c.Scopes, " ")), + "state": internal.CondVal(state), + } + for _, opt := range opts { + opt.setValue(v) + } + if strings.Contains(c.Endpoint.AuthURL, "?") { + buf.WriteByte('&') + } else { + buf.WriteByte('?') + } + buf.WriteString(v.Encode()) + return buf.String() +} + +// PasswordCredentialsToken converts a resource owner username and password +// pair into a token. +// +// Per the RFC, this grant type should only be used "when there is a high +// degree of trust between the resource owner and the client (e.g., the client +// is part of the device operating system or a highly privileged application), +// and when other authorization grant types are not available." +// See https://tools.ietf.org/html/rfc6749#section-4.3 for more info. +// +// The HTTP client to use is derived from the context. +// If nil, http.DefaultClient is used. +func (c *Config) PasswordCredentialsToken(ctx context.Context, username, password string) (*Token, error) { + return retrieveToken(ctx, c, url.Values{ + "grant_type": {"password"}, + "username": {username}, + "password": {password}, + "scope": internal.CondVal(strings.Join(c.Scopes, " ")), + }) +} + +// Exchange converts an authorization code into a token. +// +// It is used after a resource provider redirects the user back +// to the Redirect URI (the URL obtained from AuthCodeURL). +// +// The HTTP client to use is derived from the context. +// If a client is not provided via the context, http.DefaultClient is used. +// +// The code will be in the *http.Request.FormValue("code"). Before +// calling Exchange, be sure to validate FormValue("state"). +func (c *Config) Exchange(ctx context.Context, code string) (*Token, error) { + return retrieveToken(ctx, c, url.Values{ + "grant_type": {"authorization_code"}, + "code": {code}, + "redirect_uri": internal.CondVal(c.RedirectURL), + "scope": internal.CondVal(strings.Join(c.Scopes, " ")), + }) +} + +// Client returns an HTTP client using the provided token. +// The token will auto-refresh as necessary. The underlying +// HTTP transport will be obtained using the provided context. +// The returned client and its Transport should not be modified. +func (c *Config) Client(ctx context.Context, t *Token) *http.Client { + return NewClient(ctx, c.TokenSource(ctx, t)) +} + +// TokenSource returns a TokenSource that returns t until t expires, +// automatically refreshing it as necessary using the provided context. +// +// Most users will use Config.Client instead. +func (c *Config) TokenSource(ctx context.Context, t *Token) TokenSource { + tkr := &tokenRefresher{ + ctx: ctx, + conf: c, + } + if t != nil { + tkr.refreshToken = t.RefreshToken + } + return &reuseTokenSource{ + t: t, + new: tkr, + } +} + +// tokenRefresher is a TokenSource that makes "grant_type"=="refresh_token" +// HTTP requests to renew a token using a RefreshToken. +type tokenRefresher struct { + ctx context.Context // used to get HTTP requests + conf *Config + refreshToken string +} + +// WARNING: Token is not safe for concurrent access, as it +// updates the tokenRefresher's refreshToken field. +// Within this package, it is used by reuseTokenSource which +// synchronizes calls to this method with its own mutex. +func (tf *tokenRefresher) Token() (*Token, error) { + if tf.refreshToken == "" { + return nil, errors.New("oauth2: token expired and refresh token is not set") + } + + tk, err := retrieveToken(tf.ctx, tf.conf, url.Values{ + "grant_type": {"refresh_token"}, + "refresh_token": {tf.refreshToken}, + }) + + if err != nil { + return nil, err + } + if tf.refreshToken != tk.RefreshToken { + tf.refreshToken = tk.RefreshToken + } + return tk, err +} + +// reuseTokenSource is a TokenSource that holds a single token in memory +// and validates its expiry before each call to retrieve it with +// Token. If it's expired, it will be auto-refreshed using the +// new TokenSource. +type reuseTokenSource struct { + new TokenSource // called when t is expired. + + mu sync.Mutex // guards t + t *Token +} + +// 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 *reuseTokenSource) Token() (*Token, error) { + s.mu.Lock() + defer s.mu.Unlock() + if s.t.Valid() { + return s.t, nil + } + t, err := s.new.Token() + if err != nil { + return nil, err + } + s.t = t + return t, nil +} + +// StaticTokenSource returns a TokenSource that always returns the same token. +// Because the provided token t is never refreshed, StaticTokenSource is only +// useful for tokens that never expire. +func StaticTokenSource(t *Token) TokenSource { + return staticTokenSource{t} +} + +// staticTokenSource is a TokenSource that always returns the same Token. +type staticTokenSource struct { + t *Token +} + +func (s staticTokenSource) Token() (*Token, error) { + return s.t, nil +} + +// HTTPClient is the context key to use with golang.org/x/net/context's +// WithValue function to associate an *http.Client value with a context. +var HTTPClient internal.ContextKey + +// NewClient creates an *http.Client from a Context and TokenSource. +// The returned client is not valid beyond the lifetime of the context. +// +// As a special case, if src is nil, a non-OAuth2 client is returned +// using the provided context. This exists to support related OAuth2 +// packages. +func NewClient(ctx context.Context, src TokenSource) *http.Client { + if src == nil { + c, err := internal.ContextClient(ctx) + if err != nil { + return &http.Client{Transport: internal.ErrorTransport{err}} + } + return c + } + return &http.Client{ + Transport: &Transport{ + Base: internal.ContextTransport(ctx), + Source: ReuseTokenSource(nil, src), + }, + } +} + +// ReuseTokenSource returns a TokenSource which repeatedly returns the +// same token as long as it's valid, starting with t. +// When its cached token is invalid, a new token is obtained from src. +// +// ReuseTokenSource is typically used to reuse tokens from a cache +// (such as a file on disk) between runs of a program, rather than +// obtaining new tokens unnecessarily. +// +// The initial token t may be nil, in which case the TokenSource is +// wrapped in a caching version if it isn't one already. This also +// means it's always safe to wrap ReuseTokenSource around any other +// TokenSource without adverse effects. +func ReuseTokenSource(t *Token, src TokenSource) TokenSource { + // Don't wrap a reuseTokenSource in itself. That would work, + // but cause an unnecessary number of mutex operations. + // Just build the equivalent one. + if rt, ok := src.(*reuseTokenSource); ok { + if t == nil { + // Just use it directly. + return rt + } + src = rt.new + } + return &reuseTokenSource{ + t: t, + new: src, + } +} diff --git a/vendor/golang.org/x/oauth2/token.go b/vendor/golang.org/x/oauth2/token.go new file mode 100644 index 0000000..7a3167f --- /dev/null +++ b/vendor/golang.org/x/oauth2/token.go @@ -0,0 +1,158 @@ +// 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 oauth2 + +import ( + "net/http" + "net/url" + "strconv" + "strings" + "time" + + "golang.org/x/net/context" + "golang.org/x/oauth2/internal" +) + +// expiryDelta determines how earlier a token should be considered +// expired than its actual expiration time. It is used to avoid late +// expirations due to client-server time mismatches. +const expiryDelta = 10 * time.Second + +// Token represents the crendentials used to authorize +// the requests to access protected resources on the OAuth 2.0 +// provider's backend. +// +// Most users of this package should not access fields of Token +// directly. They're exported mostly for use by related packages +// implementing derivative OAuth2 flows. +type Token struct { + // AccessToken is the token that authorizes and authenticates + // the requests. + AccessToken string `json:"access_token"` + + // TokenType is the type of token. + // The Type method returns either this or "Bearer", the default. + TokenType string `json:"token_type,omitempty"` + + // RefreshToken is a token that's used by the application + // (as opposed to the user) to refresh the access token + // if it expires. + RefreshToken string `json:"refresh_token,omitempty"` + + // Expiry is the optional expiration time of the access token. + // + // If zero, TokenSource implementations will reuse the same + // token forever and RefreshToken or equivalent + // mechanisms for that TokenSource will not be used. + Expiry time.Time `json:"expiry,omitempty"` + + // raw optionally contains extra metadata from the server + // when updating a token. + raw interface{} +} + +// Type returns t.TokenType if non-empty, else "Bearer". +func (t *Token) Type() string { + if strings.EqualFold(t.TokenType, "bearer") { + return "Bearer" + } + if strings.EqualFold(t.TokenType, "mac") { + return "MAC" + } + if strings.EqualFold(t.TokenType, "basic") { + return "Basic" + } + if t.TokenType != "" { + return t.TokenType + } + return "Bearer" +} + +// SetAuthHeader sets the Authorization header to r using the access +// token in t. +// +// This method is unnecessary when using Transport or an HTTP Client +// returned by this package. +func (t *Token) SetAuthHeader(r *http.Request) { + r.Header.Set("Authorization", t.Type()+" "+t.AccessToken) +} + +// WithExtra returns a new Token that's a clone of t, but using the +// provided raw extra map. This is only intended for use by packages +// implementing derivative OAuth2 flows. +func (t *Token) WithExtra(extra interface{}) *Token { + t2 := new(Token) + *t2 = *t + t2.raw = extra + return t2 +} + +// Extra returns an extra field. +// Extra fields are key-value pairs returned by the server as a +// part of the token retrieval response. +func (t *Token) Extra(key string) interface{} { + if raw, ok := t.raw.(map[string]interface{}); ok { + return raw[key] + } + + vals, ok := t.raw.(url.Values) + if !ok { + return nil + } + + v := vals.Get(key) + switch s := strings.TrimSpace(v); strings.Count(s, ".") { + case 0: // Contains no "."; try to parse as int + if i, err := strconv.ParseInt(s, 10, 64); err == nil { + return i + } + case 1: // Contains a single "."; try to parse as float + if f, err := strconv.ParseFloat(s, 64); err == nil { + return f + } + } + + return v +} + +// expired reports whether the token is expired. +// t must be non-nil. +func (t *Token) expired() bool { + if t.Expiry.IsZero() { + return false + } + return t.Expiry.Add(-expiryDelta).Before(time.Now()) +} + +// Valid reports whether t is non-nil, has an AccessToken, and is not expired. +func (t *Token) Valid() bool { + return t != nil && t.AccessToken != "" && !t.expired() +} + +// tokenFromInternal maps an *internal.Token struct into +// a *Token struct. +func tokenFromInternal(t *internal.Token) *Token { + if t == nil { + return nil + } + return &Token{ + AccessToken: t.AccessToken, + TokenType: t.TokenType, + RefreshToken: t.RefreshToken, + Expiry: t.Expiry, + raw: t.Raw, + } +} + +// retrieveToken takes a *Config and uses that to retrieve an *internal.Token. +// This token is then mapped from *internal.Token into an *oauth2.Token which is returned along +// with an error.. +func retrieveToken(ctx context.Context, c *Config, v url.Values) (*Token, error) { + tk, err := internal.RetrieveToken(ctx, c.ClientID, c.ClientSecret, c.Endpoint.TokenURL, v) + if err != nil { + return nil, err + } + return tokenFromInternal(tk), nil +} diff --git a/vendor/golang.org/x/oauth2/transport.go b/vendor/golang.org/x/oauth2/transport.go new file mode 100644 index 0000000..92ac7e2 --- /dev/null +++ b/vendor/golang.org/x/oauth2/transport.go @@ -0,0 +1,132 @@ +// 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 oauth2 + +import ( + "errors" + "io" + "net/http" + "sync" +) + +// Transport is an http.RoundTripper that makes OAuth 2.0 HTTP requests, +// wrapping a base RoundTripper and adding an Authorization header +// with a token from the supplied Sources. +// +// Transport is a low-level mechanism. Most code will use the +// higher-level Config.Client method instead. +type Transport struct { + // Source supplies the token to add to outgoing requests' + // Authorization headers. + Source TokenSource + + // Base is the base RoundTripper used to make HTTP requests. + // If nil, http.DefaultTransport is used. + Base http.RoundTripper + + mu sync.Mutex // guards modReq + modReq map[*http.Request]*http.Request // original -> modified +} + +// RoundTrip authorizes and authenticates the request with an +// access token. If no token exists or token is expired, +// tries to refresh/fetch a new token. +func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) { + if t.Source == nil { + return nil, errors.New("oauth2: Transport's Source is nil") + } + token, err := t.Source.Token() + if err != nil { + return nil, err + } + + req2 := cloneRequest(req) // per RoundTripper contract + token.SetAuthHeader(req2) + t.setModReq(req, req2) + res, err := t.base().RoundTrip(req2) + if err != nil { + t.setModReq(req, nil) + return nil, err + } + res.Body = &onEOFReader{ + rc: res.Body, + fn: func() { t.setModReq(req, nil) }, + } + return res, nil +} + +// CancelRequest cancels an in-flight request by closing its connection. +func (t *Transport) CancelRequest(req *http.Request) { + type canceler interface { + CancelRequest(*http.Request) + } + if cr, ok := t.base().(canceler); ok { + t.mu.Lock() + modReq := t.modReq[req] + delete(t.modReq, req) + t.mu.Unlock() + cr.CancelRequest(modReq) + } +} + +func (t *Transport) base() http.RoundTripper { + if t.Base != nil { + return t.Base + } + return http.DefaultTransport +} + +func (t *Transport) setModReq(orig, mod *http.Request) { + t.mu.Lock() + defer t.mu.Unlock() + if t.modReq == nil { + t.modReq = make(map[*http.Request]*http.Request) + } + if mod == nil { + delete(t.modReq, orig) + } else { + t.modReq[orig] = mod + } +} + +// cloneRequest returns a clone of the provided *http.Request. +// The clone is a shallow copy of the struct and its Header map. +func cloneRequest(r *http.Request) *http.Request { + // shallow copy of the struct + r2 := new(http.Request) + *r2 = *r + // deep copy of the Header + r2.Header = make(http.Header, len(r.Header)) + for k, s := range r.Header { + r2.Header[k] = append([]string(nil), s...) + } + return r2 +} + +type onEOFReader struct { + rc io.ReadCloser + fn func() +} + +func (r *onEOFReader) Read(p []byte) (n int, err error) { + n, err = r.rc.Read(p) + if err == io.EOF { + r.runFunc() + } + return +} + +func (r *onEOFReader) Close() error { + err := r.rc.Close() + r.runFunc() + return err +} + +func (r *onEOFReader) runFunc() { + if fn := r.fn; fn != nil { + fn() + r.fn = nil + } +} |