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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\Site_Kit_Dependencies\Google\Auth; use DomainException; use Google\Site_Kit_Dependencies\Google\Auth\Credentials\AppIdentityCredentials; use Google\Site_Kit_Dependencies\Google\Auth\Credentials\GCECredentials; use Google\Site_Kit_Dependencies\Google\Auth\Credentials\ServiceAccountCredentials; use Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpClientCache; use Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpHandlerFactory; use Google\Site_Kit_Dependencies\Google\Auth\Middleware\AuthTokenMiddleware; use Google\Site_Kit_Dependencies\Google\Auth\Middleware\ProxyAuthTokenMiddleware; use Google\Site_Kit_Dependencies\Google\Auth\Subscriber\AuthTokenSubscriber; use Google\Site_Kit_Dependencies\GuzzleHttp\Client; use InvalidArgumentException; use Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface; /** * ApplicationDefaultCredentials obtains the default credentials for * authorizing a request to a Google service. * * Application Default Credentials are described here: * https://developers.google.com/accounts/docs/application-default-credentials * * This class implements the search for the application default credentials as * described in the link. * * It provides three factory methods: * - #get returns the computed credentials object * - #getSubscriber returns an AuthTokenSubscriber built from the credentials object * - #getMiddleware returns an AuthTokenMiddleware built from the credentials object * * This allows it to be used as follows with GuzzleHttp\Client: * * ``` * use Google\Auth\ApplicationDefaultCredentials; * use GuzzleHttp\Client; * use GuzzleHttp\HandlerStack; * * $middleware = ApplicationDefaultCredentials::getMiddleware( * 'https://www.googleapis.com/auth/taskqueue' * ); * $stack = HandlerStack::create(); * $stack->push($middleware); * * $client = new Client([ * 'handler' => $stack, * 'base_uri' => 'https://www.googleapis.com/taskqueue/v1beta2/projects/', * 'auth' => 'google_auth' // authorize all requests * ]); * * $res = $client->get('myproject/taskqueues/myqueue'); * ``` */ class ApplicationDefaultCredentials { /** * @deprecated * * Obtains an AuthTokenSubscriber that uses the default FetchAuthTokenInterface * implementation to use in this environment. * * If supplied, $scope is used to in creating the credentials instance if * this does not fallback to the compute engine defaults. * * @param string|string[] $scope the scope of the access request, expressed * either as an Array or as a space-delimited String. * @param callable $httpHandler callback which delivers psr7 request * @param array<mixed> $cacheConfig configuration for the cache when it's present * @param CacheItemPoolInterface $cache A cache implementation, may be * provided if you have one already available for use. * @return AuthTokenSubscriber * @throws DomainException if no implementation can be obtained. */ public static function getSubscriber( // @phpstan-ignore-line $scope = null, callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null ) { $creds = self::getCredentials($scope, $httpHandler, $cacheConfig, $cache); /** @phpstan-ignore-next-line */ return new \Google\Site_Kit_Dependencies\Google\Auth\Subscriber\AuthTokenSubscriber($creds, $httpHandler); } /** * Obtains an AuthTokenMiddleware that uses the default FetchAuthTokenInterface * implementation to use in this environment. * * If supplied, $scope is used to in creating the credentials instance if * this does not fallback to the compute engine defaults. * * @param string|string[] $scope the scope of the access request, expressed * either as an Array or as a space-delimited String. * @param callable $httpHandler callback which delivers psr7 request * @param array<mixed> $cacheConfig configuration for the cache when it's present * @param CacheItemPoolInterface $cache A cache implementation, may be * provided if you have one already available for use. * @param string $quotaProject specifies a project to bill for access * charges associated with the request. * @return AuthTokenMiddleware * @throws DomainException if no implementation can be obtained. */ public static function getMiddleware($scope = null, callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null, $quotaProject = null) { $creds = self::getCredentials($scope, $httpHandler, $cacheConfig, $cache, $quotaProject); return new \Google\Site_Kit_Dependencies\Google\Auth\Middleware\AuthTokenMiddleware($creds, $httpHandler); } /** * Obtains the default FetchAuthTokenInterface implementation to use * in this environment. * * @param string|string[] $scope the scope of the access request, expressed * either as an Array or as a space-delimited String. * @param callable $httpHandler callback which delivers psr7 request * @param array<mixed> $cacheConfig configuration for the cache when it's present * @param CacheItemPoolInterface $cache A cache implementation, may be * provided if you have one already available for use. * @param string $quotaProject specifies a project to bill for access * charges associated with the request. * @param string|string[] $defaultScope The default scope to use if no * user-defined scopes exist, expressed either as an Array or as a * space-delimited string. * * @return FetchAuthTokenInterface * @throws DomainException if no implementation can be obtained. */ public static function getCredentials($scope = null, callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null, $quotaProject = null, $defaultScope = null) { $creds = null; $jsonKey = \Google\Site_Kit_Dependencies\Google\Auth\CredentialsLoader::fromEnv() ?: \Google\Site_Kit_Dependencies\Google\Auth\CredentialsLoader::fromWellKnownFile(); $anyScope = $scope ?: $defaultScope; if (!$httpHandler) { if (!($client = \Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpClientCache::getHttpClient())) { $client = new \Google\Site_Kit_Dependencies\GuzzleHttp\Client(); \Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpClientCache::setHttpClient($client); } $httpHandler = \Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpHandlerFactory::build($client); } if (!\is_null($jsonKey)) { if ($quotaProject) { $jsonKey['quota_project_id'] = $quotaProject; } $creds = \Google\Site_Kit_Dependencies\Google\Auth\CredentialsLoader::makeCredentials($scope, $jsonKey, $defaultScope); } elseif (\Google\Site_Kit_Dependencies\Google\Auth\Credentials\AppIdentityCredentials::onAppEngine() && !\Google\Site_Kit_Dependencies\Google\Auth\Credentials\GCECredentials::onAppEngineFlexible()) { $creds = new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\AppIdentityCredentials($anyScope); } elseif (self::onGce($httpHandler, $cacheConfig, $cache)) { $creds = new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\GCECredentials(null, $anyScope, null, $quotaProject); $creds->setIsOnGce(\true); // save the credentials a trip to the metadata server } if (\is_null($creds)) { throw new \DomainException(self::notFound()); } if (!\is_null($cache)) { $creds = new \Google\Site_Kit_Dependencies\Google\Auth\FetchAuthTokenCache($creds, $cacheConfig, $cache); } return $creds; } /** * Obtains an AuthTokenMiddleware which will fetch an ID token to use in the * Authorization header. The middleware is configured with the default * FetchAuthTokenInterface implementation to use in this environment. * * If supplied, $targetAudience is used to set the "aud" on the resulting * ID token. * * @param string $targetAudience The audience for the ID token. * @param callable $httpHandler callback which delivers psr7 request * @param array<mixed> $cacheConfig configuration for the cache when it's present * @param CacheItemPoolInterface $cache A cache implementation, may be * provided if you have one already available for use. * @return AuthTokenMiddleware * @throws DomainException if no implementation can be obtained. */ public static function getIdTokenMiddleware($targetAudience, callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null) { $creds = self::getIdTokenCredentials($targetAudience, $httpHandler, $cacheConfig, $cache); return new \Google\Site_Kit_Dependencies\Google\Auth\Middleware\AuthTokenMiddleware($creds, $httpHandler); } /** * Obtains an ProxyAuthTokenMiddleware which will fetch an ID token to use in the * Authorization header. The middleware is configured with the default * FetchAuthTokenInterface implementation to use in this environment. * * If supplied, $targetAudience is used to set the "aud" on the resulting * ID token. * * @param string $targetAudience The audience for the ID token. * @param callable $httpHandler callback which delivers psr7 request * @param array<mixed> $cacheConfig configuration for the cache when it's present * @param CacheItemPoolInterface $cache A cache implementation, may be * provided if you have one already available for use. * @return ProxyAuthTokenMiddleware * @throws DomainException if no implementation can be obtained. */ public static function getProxyIdTokenMiddleware($targetAudience, callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null) { $creds = self::getIdTokenCredentials($targetAudience, $httpHandler, $cacheConfig, $cache); return new \Google\Site_Kit_Dependencies\Google\Auth\Middleware\ProxyAuthTokenMiddleware($creds, $httpHandler); } /** * Obtains the default FetchAuthTokenInterface implementation to use * in this environment, configured with a $targetAudience for fetching an ID * token. * * @param string $targetAudience The audience for the ID token. * @param callable $httpHandler callback which delivers psr7 request * @param array<mixed> $cacheConfig configuration for the cache when it's present * @param CacheItemPoolInterface $cache A cache implementation, may be * provided if you have one already available for use. * @return FetchAuthTokenInterface * @throws DomainException if no implementation can be obtained. * @throws InvalidArgumentException if JSON "type" key is invalid */ public static function getIdTokenCredentials($targetAudience, callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null) { $creds = null; $jsonKey = \Google\Site_Kit_Dependencies\Google\Auth\CredentialsLoader::fromEnv() ?: \Google\Site_Kit_Dependencies\Google\Auth\CredentialsLoader::fromWellKnownFile(); if (!$httpHandler) { if (!($client = \Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpClientCache::getHttpClient())) { $client = new \Google\Site_Kit_Dependencies\GuzzleHttp\Client(); \Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpClientCache::setHttpClient($client); } $httpHandler = \Google\Site_Kit_Dependencies\Google\Auth\HttpHandler\HttpHandlerFactory::build($client); } if (!\is_null($jsonKey)) { if (!\array_key_exists('type', $jsonKey)) { throw new \InvalidArgumentException('json key is missing the type field'); } if ($jsonKey['type'] == 'authorized_user') { throw new \InvalidArgumentException('ID tokens are not supported for end user credentials'); } if ($jsonKey['type'] != 'service_account') { throw new \InvalidArgumentException('invalid value in the type field'); } $creds = new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\ServiceAccountCredentials(null, $jsonKey, null, $targetAudience); } elseif (self::onGce($httpHandler, $cacheConfig, $cache)) { $creds = new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\GCECredentials(null, null, $targetAudience); $creds->setIsOnGce(\true); // save the credentials a trip to the metadata server } if (\is_null($creds)) { throw new \DomainException(self::notFound()); } if (!\is_null($cache)) { $creds = new \Google\Site_Kit_Dependencies\Google\Auth\FetchAuthTokenCache($creds, $cacheConfig, $cache); } return $creds; } /** * @return string */ private static function notFound() { $msg = 'Your default credentials were not found. To set up '; $msg .= 'Application Default Credentials, see '; $msg .= 'https://cloud.google.com/docs/authentication/external/set-up-adc'; return $msg; } /** * @param callable $httpHandler * @param array<mixed> $cacheConfig * @param CacheItemPoolInterface $cache * @return bool */ private static function onGce(callable $httpHandler = null, array $cacheConfig = null, \Google\Site_Kit_Dependencies\Psr\Cache\CacheItemPoolInterface $cache = null) { $gceCacheConfig = []; foreach (['lifetime', 'prefix'] as $key) { if (isset($cacheConfig['gce_' . $key])) { $gceCacheConfig[$key] = $cacheConfig['gce_' . $key]; } } return (new \Google\Site_Kit_Dependencies\Google\Auth\GCECache($gceCacheConfig, $cache))->onGce($httpHandler); } }
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