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<?php
/*
* Copyright 2015 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\Auth\Credentials;
use Google\Auth\CredentialsLoader;
use Google\Auth\OAuth2;
/**
* Authenticates requests using User Refresh credentials.
*
* This class allows authorizing requests from user refresh tokens.
*
* This the end of the result of a 3LO flow. E.g, the end result of
* 'gcloud auth login' saves a file with these contents in well known
* location
*
* @see [Application Default Credentials](http://goo.gl/mkAHpZ)
*/
class UserRefreshCredentials extends CredentialsLoader
{
const CLOUD_SDK_CLIENT_ID =
'764086051850-6qr4p6gpi6hn506pt8ejuq83di341hur.apps.googleusercontent.com';
const SUPPRESS_CLOUD_SDK_CREDS_WARNING_ENV = 'SUPPRESS_GCLOUD_CREDS_WARNING';
/**
* The OAuth2 instance used to conduct authorization.
*
* @var OAuth2
*/
protected $auth;
/**
* Create a new UserRefreshCredentials.
*
* @param string|array $scope the scope of the access request, expressed
* either as an Array or as a space-delimited String.
* @param string|array $jsonKey JSON credential file path or JSON credentials
* as an associative array
*/
public function __construct(
$scope,
$jsonKey
) {
if (is_string($jsonKey)) {
if (!file_exists($jsonKey)) {
throw new \InvalidArgumentException('file does not exist');
}
$jsonKeyStream = file_get_contents($jsonKey);
if (!$jsonKey = json_decode($jsonKeyStream, true)) {
throw new \LogicException('invalid json for auth config');
}
}
if (!array_key_exists('client_id', $jsonKey)) {
throw new \InvalidArgumentException(
'json key is missing the client_id field');
}
if (!array_key_exists('client_secret', $jsonKey)) {
throw new \InvalidArgumentException(
'json key is missing the client_secret field');
}
if (!array_key_exists('refresh_token', $jsonKey)) {
throw new \InvalidArgumentException(
'json key is missing the refresh_token field');
}
$this->auth = new OAuth2([
'clientId' => $jsonKey['client_id'],
'clientSecret' => $jsonKey['client_secret'],
'refresh_token' => $jsonKey['refresh_token'],
'scope' => $scope,
'tokenCredentialUri' => self::TOKEN_CREDENTIAL_URI,
]);
if ($jsonKey['client_id'] === self::CLOUD_SDK_CLIENT_ID
&& getenv(self::SUPPRESS_CLOUD_SDK_CREDS_WARNING_ENV) !== 'true') {
trigger_error(
'Your application has authenticated using end user credentials '
. 'from Google Cloud SDK. We recommend that most server '
. 'applications use service accounts instead. If your '
. 'application continues to use end user credentials '
. 'from Cloud SDK, you might receive a "quota exceeded" '
. 'or "API not enabled" error. For more information about '
. 'service accounts, see '
. 'https://cloud.google.com/docs/authentication/. '
. 'To disable this warning, set '
. self::SUPPRESS_CLOUD_SDK_CREDS_WARNING_ENV
. ' environment variable to "true".',
E_USER_WARNING);
}
}
/**
* @param callable $httpHandler
*
* @return array
*/
public function fetchAuthToken(callable $httpHandler = null)
{
return $this->auth->fetchAuthToken($httpHandler);
}
/**
* @return string
*/
public function getCacheKey()
{
return $this->auth->getClientId() . ':' . $this->auth->getCacheKey();
}
/**
* @return array
*/
public function getLastReceivedToken()
{
return $this->auth->getLastReceivedToken();
}
}