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<?php /** * Copyright 2014 Facebook, Inc. * * You are hereby granted a non-exclusive, worldwide, royalty-free license to * use, copy, modify, and distribute this software in source code or binary * form for use in connection with the web services and APIs provided by * Facebook. * * As with any software that integrates with the Facebook platform, your use * of this software is subject to the Facebook Developer Principles and * Policies [http://developers.facebook.com/policy/]. This copyright notice * shall be included in all copies or substantial portions of the software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * */ namespace Facebook; /** * Class FacebookSession * @package Facebook * @author Fosco Marotto <fjm@fb.com> * @author David Poll <depoll@fb.com> */ class FacebookSession { /** * @var string */ private static $defaultAppId; /** * @var string */ private static $defaultAppSecret; /** * @var string The token string for the session */ private $token; /** * @var array */ private $signedRequestData; /** * When creating a Session from an access_token, use: * var $session = new FacebookSession($accessToken); * This will validate the token and provide a Session object ready for use. * It will throw a SessionException in case of error. * * @param string $accessToken * @param array $parsedSignedRequest The signed request data if available */ public function __construct($accessToken, $parsedSignedRequest = null) { $this->token = $accessToken; $this->signedRequestData = $parsedSignedRequest; } /** * Returns the access token * * @return string */ public function getToken() { return $this->token; } /** * Returns the signed request data from the sessions creation * * @return null|array */ public function getSignedRequestData() { return $this->signedRequestData; } /** * Returns a property from the signed request data if available * * @param string $keyname * * @return null|mixed */ public function getSignedRequestProperty($keyname) { if (isset($this->signedRequestData[$keyname])) { return $this->signedRequestData[$keyname]; } return null; } /** * Returns user_id from signed request data if available * * @return null|string */ public function getUserId() { return $this->getSignedRequestProperty('user_id'); } /** * getSessionInfo - Makes a request to /debug_token with the appropriate * arguments to get debug information about the sessions token. * * @param string|null $appId * @param string|null $appSecret * * @return GraphSessionInfo */ public function getSessionInfo($appId = null, $appSecret = null) { $targetAppId = static::_getTargetAppId($appId); $targetAppSecret = static::_getTargetAppSecret($appSecret); return (new FacebookRequest( static::newAppSession($targetAppId, $targetAppSecret), 'GET', '/debug_token', array( 'input_token' => $this->getToken(), ) ))->execute()->getGraphObject(GraphSessionInfo::className()); } /** * getLongLivedSession - Returns a new Facebook session resulting from * extending a short-lived access token. If this session is not * short-lived, returns $this. * * @param string|null $appId * @param string|null $appSecret * * @return FacebookSession */ public function getLongLivedSession($appId = null, $appSecret = null) { $targetAppId = static::_getTargetAppId($appId); $targetAppSecret = static::_getTargetAppSecret($appSecret); $params = array( 'client_id' => $targetAppId, 'client_secret' => $targetAppSecret, 'grant_type' => 'fb_exchange_token', 'fb_exchange_token' => $this->getToken() ); // The response for this endpoint is not JSON, so it must be handled // differently, not as a GraphObject. $response = (new FacebookRequest( self::newAppSession($targetAppId, $targetAppSecret), 'GET', '/oauth/access_token', $params ))->execute()->getResponse(); if ($response) { return new FacebookSession($response['access_token']); } else { return $this; } } /** * getExchangeToken - Returns an exchange token string which can be sent * back to clients and exchanged for a device-linked access token. * * @param string|null $appId * @param string|null $appSecret * * @return string */ public function getExchangeToken($appId = null, $appSecret = null) { $targetAppId = static::_getTargetAppId($appId); $targetAppSecret = static::_getTargetAppSecret($appSecret); // Redirect URI is being removed as a requirement. Passing an empty string. $params = array( 'client_id' => $targetAppId, 'access_token' => $this->getToken(), 'client_secret' => $targetAppSecret, 'redirect_uri' => '' ); $response = (new FacebookRequest( self::newAppSession($targetAppId, $targetAppSecret), 'GET', '/oauth/client_code', $params ))->execute()->getGraphObject(); return $response->getProperty('code'); } /** * validate - Ensures the current session is valid, throwing an exception if * not. Fetches token info from Facebook. * * @param string|null $appId Application ID to use * @param string|null $appSecret App secret value to use * * @return boolean */ public function validate($appId = null, $appSecret = null) { $targetAppId = static::_getTargetAppId($appId); $targetAppSecret = static::_getTargetAppSecret($appSecret); $info = $this->getSessionInfo($targetAppId, $targetAppSecret); return self::validateSessionInfo($info, $targetAppId); } /** * validateTokenInfo - Ensures the provided GraphSessionInfo object is valid, * throwing an exception if not. Ensures the appId matches, * that the token is valid and has not expired. * * @param GraphSessionInfo $tokenInfo * @param string|null $appId Application ID to use * * @return boolean * * @throws FacebookSDKException */ public static function validateSessionInfo(GraphSessionInfo $tokenInfo, $appId = null) { $targetAppId = static::_getTargetAppId($appId); if ($tokenInfo->getAppId() !== $targetAppId || !$tokenInfo->isValid() || $tokenInfo->getExpiresAt() === null || $tokenInfo->getExpiresAt()->getTimestamp() < time()) { throw new FacebookSDKException( 'Session has expired, or is not valid for this app.', 601 ); } return true; } /** * newSessionFromSignedRequest - Returns a FacebookSession for a * given signed request. * * @param string $signedRequest * @param string $state * * @return FacebookSession */ public static function newSessionFromSignedRequest($signedRequest, $state = null) { $parsedRequest = self::parseSignedRequest($signedRequest, $state); if (isset($parsedRequest['code']) && !isset($parsedRequest['oauth_token'])) { return self::newSessionAfterValidation($parsedRequest); } return new FacebookSession($parsedRequest['oauth_token'], $parsedRequest); } /** * newSessionAfterValidation - Returns a FacebookSession for a * validated & parsed signed request. * * @param array $parsedSignedRequest * * @return FacebookSession * * @throws FacebookRequestException */ private static function newSessionAfterValidation($parsedSignedRequest) { $params = array( 'client_id' => self::$defaultAppId, 'redirect_uri' => '', 'client_secret' => self::$defaultAppSecret, 'code' => $parsedSignedRequest['code'] ); $response = (new FacebookRequest( self::newAppSession( self::$defaultAppId, self::$defaultAppSecret), 'GET', '/oauth/access_token', $params ))->execute()->getResponse(); if (isset($response['access_token'])) { return new FacebookSession( $response['access_token'], $parsedSignedRequest ); } throw FacebookRequestException::create( json_encode($parsedSignedRequest), $parsedSignedRequest, 401 ); } /** * Parses a signed request. * * @param string $signedRequest * @param string $state * * @return array * * @throws FacebookSDKException */ private static function parseSignedRequest($signedRequest, $state) { if (strpos($signedRequest, '.') !== false) { list($encodedSig, $encodedData) = explode('.', $signedRequest, 2); $sig = self::_base64UrlDecode($encodedSig); $data = json_decode(self::_base64UrlDecode($encodedData), true); if (isset($data['algorithm']) && $data['algorithm'] === 'HMAC-SHA256') { $expectedSig = hash_hmac( 'sha256', $encodedData, self::$defaultAppSecret, true ); if (strlen($sig) !== strlen($expectedSig)) { throw new FacebookSDKException( 'Invalid signature on signed request.', 602 ); } $validate = 0; for ($i = 0; $i < strlen($sig); $i++) { $validate |= ord($expectedSig[$i]) ^ ord($sig[$i]); } if ($validate !== 0) { throw new FacebookSDKException( 'Invalid signature on signed request.', 602 ); } if (!isset($data['oauth_token']) && !isset($data['code'])) { throw new FacebookSDKException( 'Invalid signed request, missing OAuth data.', 603 ); } if ($state && (!isset($data['state']) || $data['state'] != $state)) { throw new FacebookSDKException( 'Signed request did not pass CSRF validation.', 604 ); } return $data; } else { throw new FacebookSDKException( 'Invalid signed request, using wrong algorithm.', 605 ); } } else { throw new FacebookSDKException( 'Malformed signed request.', 606 ); } } /** * newAppSession - Returns a FacebookSession configured with a token for the * application which can be used for publishing and requesting app-level * information. * * @param string|null $appId Application ID to use * @param string|null $appSecret App secret value to use * * @return FacebookSession */ public static function newAppSession($appId = null, $appSecret = null) { $targetAppId = static::_getTargetAppId($appId); $targetAppSecret = static::_getTargetAppSecret($appSecret); return new FacebookSession( $targetAppId . '|' . $targetAppSecret ); } /** * setDefaultApplication - Will set the static default appId and appSecret * to be used for API requests. * * @param string $appId Application ID to use by default * @param string $appSecret App secret value to use by default */ public static function setDefaultApplication($appId, $appSecret) { self::$defaultAppId = $appId; self::$defaultAppSecret = $appSecret; } /** * _getTargetAppId - Will return either the provided app Id or the default, * throwing if neither are populated. * * @param string $appId * * @return string * * @throws FacebookSDKException */ public static function _getTargetAppId($appId = null) { $target = ($appId ?: self::$defaultAppId); if (!$target) { throw new FacebookSDKException( 'You must provide or set a default application id.', 700 ); } return $target; } /** * _getTargetAppSecret - Will return either the provided app secret or the * default, throwing if neither are populated. * * @param string $appSecret * * @return string * * @throws FacebookSDKException */ public static function _getTargetAppSecret($appSecret = null) { $target = ($appSecret ?: self::$defaultAppSecret); if (!$target) { throw new FacebookSDKException( 'You must provide or set a default application secret.', 701 ); } return $target; } /** * Base64 decoding which replaces characters: * + instead of - * / instead of _ * @link http://en.wikipedia.org/wiki/Base64#URL_applications * * @param string $input base64 url encoded input * * @return string The decoded string */ public static function _base64UrlDecode($input) { return base64_decode(strtr($input, '-_', '+/')); } }

Version	System time (s)	User time (s)	Memory (MiB)
8.0.11	0.004	0.004	16.87
8.0.10	0.000	0.008	16.90
8.0.9	0.000	0.008	16.98
8.0.8	0.003	0.017	16.88
8.0.7	0.004	0.004	16.88
8.0.6	0.004	0.004	16.82
8.0.5	0.008	0.000	16.89
8.0.3	0.010	0.010	17.13
8.0.2	0.012	0.006	17.40
8.0.1	0.000	0.007	16.89
8.0.0	0.014	0.004	16.71
7.4.24	0.002	0.005	16.55
7.4.23	0.004	0.004	16.44
7.4.22	0.013	0.007	16.51
7.4.21	0.009	0.008	16.61
7.4.20	0.004	0.004	16.44
7.4.19	0.004	0.004	16.58
7.4.16	0.010	0.007	16.28
7.4.15	0.016	0.003	17.40
7.4.14	0.013	0.005	17.86
7.4.13	0.013	0.006	16.50
7.4.12	0.010	0.009	16.52
7.4.11	0.010	0.006	16.55
7.4.10	0.011	0.006	16.49
7.4.9	0.006	0.012	16.60
7.4.8	0.009	0.009	19.39
7.4.7	0.018	0.004	16.51
7.4.6	0.012	0.006	16.47
7.4.5	0.005	0.003	16.66
7.4.4	0.006	0.010	22.77
7.4.3	0.006	0.013	16.43
7.4.0	0.007	0.007	14.86
7.3.30	0.005	0.002	16.35
7.3.29	0.003	0.012	16.30
7.3.28	0.008	0.009	16.35
7.3.27	0.013	0.004	17.40
7.3.26	0.010	0.007	16.46
7.3.25	0.013	0.007	16.26
7.3.24	0.009	0.008	16.52
7.3.23	0.012	0.011	16.39
7.3.21	0.008	0.008	16.57
7.3.20	0.013	0.010	19.39
7.3.19	0.004	0.015	16.44
7.3.18	0.018	0.000	16.31
7.3.17	0.000	0.017	16.34
7.3.16	0.006	0.014	16.61
7.3.12	0.003	0.015	14.88
7.3.1	0.005	0.007	16.69
7.3.0	0.004	0.009	16.37
7.2.33	0.012	0.009	16.51
7.2.32	0.007	0.014	16.33
7.2.31	0.006	0.011	16.54
7.2.30	0.007	0.010	16.29
7.2.29	0.008	0.009	16.46
7.2.13	0.007	0.007	16.78
7.2.12	0.005	0.007	16.76
7.2.11	0.003	0.010	16.53
7.2.10	0.001	0.010	16.46
7.2.9	0.004	0.006	16.76
7.2.8	0.009	0.004	16.64
7.2.7	0.006	0.008	16.78
7.2.6	0.006	0.007	16.78
7.2.5	0.008	0.003	16.83
7.2.4	0.005	0.007	16.54
7.2.3	0.006	0.006	16.77
7.2.2	0.006	0.008	16.54
7.2.1	0.007	0.005	16.63
7.2.0	0.005	0.007	16.79
7.1.25	0.003	0.009	15.65
7.1.20	0.008	0.003	15.66
7.1.7	0.005	0.005	16.69
7.1.6	0.006	0.009	19.32
7.1.5	0.010	0.010	16.82
7.1.0	0.007	0.030	22.29
7.0.20	0.000	0.008	16.26
7.0.14	0.007	0.063	21.97
7.0.10	0.007	0.067	20.16
7.0.9	0.010	0.077	20.00
7.0.8	0.010	0.070	20.04
7.0.7	0.017	0.077	19.99
7.0.6	0.007	0.050	20.20
7.0.5	0.013	0.073	20.48
7.0.4	0.010	0.077	20.14
7.0.3	0.010	0.080	20.16
7.0.2	0.000	0.057	20.08
7.0.1	0.003	0.087	20.05
7.0.0	0.003	0.060	20.18
5.6.28	0.007	0.070	21.14
5.6.25	0.017	0.070	20.83
5.6.24	0.003	0.083	20.69
5.6.23	0.013	0.077	20.66
5.6.22	0.007	0.083	20.75
5.6.21	0.007	0.080	20.55
5.6.20	0.023	0.063	21.25
5.6.19	0.013	0.080	21.01
5.6.18	0.003	0.087	21.24
5.6.17	0.007	0.083	21.09
5.6.16	0.007	0.040	21.04
5.6.15	0.007	0.043	21.18
5.6.14	0.000	0.053	21.18
5.6.13	0.003	0.050	21.09
5.6.12	0.003	0.043	21.08
5.6.11	0.007	0.033	21.02
5.6.10	0.003	0.040	21.02
5.6.9	0.000	0.047	21.15
5.6.8	0.003	0.043	20.43
5.6.7	0.007	0.050	20.57
5.6.6	0.000	0.043	20.46
5.6.5	0.003	0.037	20.48
5.6.4	0.010	0.030	20.54
5.6.3	0.007	0.043	20.39
5.6.2	0.003	0.050	20.51
5.6.1	0.003	0.040	20.37
5.6.0	0.003	0.037	20.59
5.5.38	0.013	0.073	20.43
5.5.37	0.010	0.070	20.64
5.5.36	0.010	0.053	20.48
5.5.35	0.003	0.077	20.54
5.5.34	0.007	0.080	20.91
5.5.33	0.020	0.097	20.83
5.5.32	0.007	0.087	20.98
5.5.31	0.007	0.090	20.70
5.5.30	0.000	0.047	20.95
5.5.29	0.003	0.053	20.69
5.5.28	0.010	0.037	20.71
5.5.27	0.000	0.047	20.82
5.5.26	0.003	0.063	20.95
5.5.25	0.007	0.070	20.71
5.5.24	0.000	0.047	20.24
5.5.23	0.007	0.037	20.29
5.5.22	0.010	0.073	20.21
5.5.21	0.010	0.053	20.28
5.5.20	0.007	0.037	20.25
5.5.19	0.000	0.043	20.30
5.5.18	0.000	0.043	20.05
5.5.16	0.000	0.047	20.33
5.5.15	0.000	0.043	20.15
5.5.14	0.007	0.037	20.20
5.5.13	0.003	0.037	20.34
5.5.12	0.003	0.040	20.31
5.5.11	0.000	0.050	20.31
5.5.10	0.010	0.037	20.24
5.5.9	0.010	0.033	20.05
5.5.8	0.000	0.047	20.20
5.5.7	0.003	0.040	20.13
5.5.6	0.007	0.033	20.16
5.5.5	0.003	0.040	20.22
5.5.4	0.000	0.043	20.17
5.5.3	0.007	0.077	20.00
5.5.2	0.003	0.087	20.16
5.5.1	0.010	0.050	20.08
5.5.0	0.013	0.073	20.12
5.4.45	0.007	0.040	19.39
5.4.44	0.007	0.043	19.23
5.4.43	0.003	0.037	19.19
5.4.42	0.000	0.040	19.35
5.4.41	0.013	0.030	19.33
5.4.40	0.000	0.043	18.91
5.4.39	0.003	0.040	19.14
5.4.38	0.000	0.043	19.16
5.4.37	0.003	0.067	19.18
5.4.36	0.010	0.047	19.16
5.4.35	0.007	0.033	18.89
5.4.34	0.003	0.037	18.86
5.4.32	0.003	0.067	19.03
5.4.31	0.007	0.047	19.16
5.4.30	0.007	0.037	18.89
5.4.29	0.003	0.033	19.21
5.4.28	0.003	0.040	19.03
5.4.27	0.000	0.050	19.13
5.4.26	0.007	0.033	19.19
5.4.25	0.003	0.033	18.90
5.4.24	0.007	0.037	18.85
5.4.23	0.010	0.033	19.13
5.4.22	0.007	0.040	19.21
5.4.21	0.000	0.047	19.23
5.4.20	0.007	0.037	18.89
5.4.19	0.013	0.057	18.89
5.4.18	0.007	0.077	19.22
5.4.17	0.017	0.070	19.04
5.4.16	0.013	0.073	19.01
5.4.15	0.013	0.070	18.94
5.4.14	0.007	0.070	16.41
5.4.13	0.003	0.073	16.39
5.4.12	0.007	0.070	16.49
5.4.11	0.007	0.040	16.39
5.4.10	0.007	0.063	16.50
5.4.9	0.010	0.073	16.53
5.4.8	0.010	0.063	16.44
5.4.7	0.007	0.057	16.55
5.4.6	0.010	0.073	16.52
5.4.5	0.007	0.077	16.46
5.4.4	0.003	0.073	16.31
5.4.3	0.013	0.067	16.58
5.4.2	0.007	0.050	16.52
5.4.1	0.013	0.067	16.52
5.4.0	0.010	0.063	15.93
5.3.29	0.000	0.040	14.61
5.3.28	0.007	0.033	14.70
5.3.27	0.010	0.067	14.61
5.3.26	0.010	0.073	14.54
5.3.25	0.007	0.080	14.71
5.3.24	0.007	0.080	14.75
5.3.23	0.017	0.063	14.64
5.3.22	0.007	0.077	14.57
5.3.21	0.003	0.047	14.72
5.3.20	0.007	0.073	14.54
5.3.19	0.003	0.070	14.61
5.3.18	0.010	0.077	14.70
5.3.17	0.000	0.077	14.51
5.3.16	0.007	0.073	14.60
5.3.15	0.003	0.077	14.56
5.3.14	0.010	0.047	14.51
5.3.13	0.010	0.070	14.50
5.3.12	0.017	0.070	14.63
5.3.11	0.010	0.073	14.66
5.3.10	0.003	0.077	14.12
5.3.9	0.003	0.063	14.13
5.3.8	0.013	0.063	14.16
5.3.7	0.007	0.073	13.97
5.3.6	0.003	0.063	14.15
5.3.5	0.003	0.067	13.98
5.3.4	0.010	0.073	13.94
5.3.3	0.003	0.073	13.86
5.3.2	0.017	0.037	13.77
5.3.1	0.007	0.073	13.73
5.3.0	0.000	0.043	13.57