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<?php |
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/** |
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* Copyright 2016 François Kooman <[email protected]>. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace fkooman\OAuth\Client; |
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use fkooman\OAuth\Client\Exception\OAuthException; |
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use InvalidArgumentException; |
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use DomainException; |
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/** |
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* OAuth 2.0 Client. Helper class to make it easy to obtain an access token |
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* from an OAuth 2.0 provider. |
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*/ |
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class OAuth2Client |
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{ |
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/** @var Provider */ |
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private $provider; |
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/** @var HttpClientInterface */ |
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private $httpClient; |
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/** @var RandomInterface */ |
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private $random; |
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/** |
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* Instantiate an OAuth 2.0 Client. |
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* |
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* @param Provider $provider the OAuth 2.0 provider configuration |
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* @param HttpClientInterface $httpClient the HTTP client implementation |
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* @param RandomInterface $random the random implementation |
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*/ |
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public function __construct(Provider $provider, HttpClientInterface $httpClient, RandomInterface $random = null) |
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{ |
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$this->provider = $provider; |
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$this->httpClient = $httpClient; |
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if (is_null($random)) { |
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$random = new Random(); |
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} |
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$this->random = $random; |
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} |
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/** |
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* Obtain an authorization request URL to start the authorization process |
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* at the OAuth provider. |
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* |
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* @param string $scope the space separated scope tokens |
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* @param string $redirectUri the URL to redirect back to after coming back |
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* from the OAuth provider (callback URL) |
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* |
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* @return string the authorization request URL |
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* |
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* @see https://tools.ietf.org/html/rfc6749#section-3.3 |
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* @see https://tools.ietf.org/html/rfc6749#section-3.1.2 |
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*/ |
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public function getAuthorizationRequestUri($scope, $redirectUri) |
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{ |
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$state = $this->random->get(); |
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$queryParams = http_build_query( |
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[ |
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'client_id' => $this->provider->getId(), |
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'redirect_uri' => $redirectUri, |
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'scope' => $scope, |
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'state' => $state, |
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'response_type' => 'code', |
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], |
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'&' |
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); |
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return sprintf( |
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'%s%s%s', |
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$this->provider->getAuthorizationEndpoint(), |
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false === strpos($this->provider->getAuthorizationEndpoint(), '?') ? '?' : '&', |
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$queryParams |
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); |
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} |
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/** |
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* Obtain the access token from the OAuth provider after returning from the |
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* OAuth provider on the redirectUri (callback URL). |
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* |
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* @param string $authorizationRequestUri the original authorization |
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* request URL as obtained by getAuthorzationRequestUri |
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* @param string $authorizationResponseCode the code passed to the 'code' |
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* query parameter on the callback URL |
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* @param string $authorizationResponseState the state passed to the 'state' |
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* query parameter on the callback URL |
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* |
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* @return AccessToken |
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*/ |
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public function getAccessToken($authorizationRequestUri, $authorizationResponseCode, $authorizationResponseState) |
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{ |
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self::requireNonEmptyStrings(func_get_args()); |
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// parse our authorizationRequestUri to extract the state |
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if (false === strpos($authorizationRequestUri, '?')) { |
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throw new OAuthException('invalid authorizationRequestUri'); |
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} |
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parse_str(explode('?', $authorizationRequestUri)[1], $queryParams); |
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if (!isset($queryParams['state'])) { |
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throw new OAuthException('state missing from authorizationRequestUri'); |
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} |
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if (!isset($queryParams['redirect_uri'])) { |
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throw new OAuthException('redirect_uri missing from authorizationRequestUri'); |
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} |
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if ($authorizationResponseState !== $queryParams['state']) { |
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throw new OAuthException('state from authorizationRequestUri does not equal authorizationResponseState'); |
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} |
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// prepare access_token request |
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$tokenRequestData = [ |
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'client_id' => $this->provider->getId(), |
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'grant_type' => 'authorization_code', |
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'code' => $authorizationResponseCode, |
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'redirect_uri' => $queryParams['redirect_uri'], |
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]; |
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$responseData = self::validateTokenResponse( |
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$this->httpClient->post( |
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$this->provider, |
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$tokenRequestData |
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) |
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); |
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return new AccessToken( |
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$responseData['access_token'], |
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$responseData['token_type'], |
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$responseData['scope'], |
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$responseData['expire_in'] |
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); |
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} |
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private static function validateTokenResponse($jsonString) |
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{ |
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$responseData = json_decode($jsonString, true); |
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if (JSON_ERROR_NONE !== json_last_error()) { |
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throw new OAuthException('non-JSON data received from token endpoint'); |
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} |
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if (!is_array($responseData)) { |
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throw new OAuthException('invalid data received from token endpoint'); |
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} |
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if (!isset($responseData['access_token'])) { |
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throw new OAuthException('no access_token received from token endpoint'); |
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} |
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if (!isset($responseData['token_type'])) { |
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throw new OAuthException('no token_type received from token endpoint'); |
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} |
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if (!isset($responseData['scope'])) { |
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$responseData['scope'] = null; |
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} |
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if (!isset($responseData['expires_in'])) { |
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$responseData['expire_in'] = null; |
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} |
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return $responseData; |
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} |
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private static function requireNonEmptyStrings(array $strs) |
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{ |
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foreach ($strs as $no => $str) { |
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if (!is_string($str)) { |
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throw new InvalidArgumentException(sprintf('parameter %d must be string', $no)); |
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} |
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if (0 >= strlen($str)) { |
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throw new DomainException(sprintf('parameter %d must be non-empty', $no)); |
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} |
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} |
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} |
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} |
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fkooman /
php-oauth2-client
