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55 lines
2.2 KiB
Go
55 lines
2.2 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !go1.9
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package google
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import (
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"golang.org/x/net/context"
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"golang.org/x/oauth2"
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)
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// DefaultCredentials holds Google credentials, including "Application Default Credentials".
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// For more details, see:
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// https://developers.google.com/accounts/docs/application-default-credentials
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type DefaultCredentials struct {
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ProjectID string // may be empty
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TokenSource oauth2.TokenSource
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// JSON contains the raw bytes from a JSON credentials file.
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// This field may be nil if authentication is provided by the
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// environment and not with a credentials file, e.g. when code is
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// running on Google Cloud Platform.
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JSON []byte
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}
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// FindDefaultCredentials searches for "Application Default Credentials".
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//
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// It looks for credentials in the following places,
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// preferring the first location found:
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//
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// 1. A JSON file whose path is specified by the
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// GOOGLE_APPLICATION_CREDENTIALS environment variable.
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// 2. A JSON file in a location known to the gcloud command-line tool.
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// On Windows, this is %APPDATA%/gcloud/application_default_credentials.json.
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// On other systems, $HOME/.config/gcloud/application_default_credentials.json.
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// 3. On Google App Engine it uses the appengine.AccessToken function.
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// 4. On Google Compute Engine and Google App Engine Managed VMs, it fetches
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// credentials from the metadata server.
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// (In this final case any provided scopes are ignored.)
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func FindDefaultCredentials(ctx context.Context, scopes ...string) (*DefaultCredentials, error) {
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return findDefaultCredentials(ctx, scopes)
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}
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// CredentialsFromJSON obtains Google credentials from a JSON value. The JSON can
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// represent either a Google Developers Console client_credentials.json file (as in
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// ConfigFromJSON) or a Google Developers service account key file (as in
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// JWTConfigFromJSON).
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//
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// Note: despite the name, the returned credentials may not be Application Default Credentials.
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func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*DefaultCredentials, error) {
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return credentialsFromJSON(ctx, jsonData, scopes)
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}
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