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<?php |
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namespace SimpleSAML\Module\authtwitter\Auth\Source; |
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use League\OAuth1\Client\Server\Twitter as TwitterServer; |
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use SimpleSAML\Assert\Assert; |
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use SimpleSAML\Auth; |
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use SimpleSAML\Configuration; |
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use SimpleSAML\Error; |
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use SimpleSAML\Logger; |
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use SimpleSAML\Module; |
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use SimpleSAML\Utils; |
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use Symfony\Component\HttpFoundation\Request; |
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/** |
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* Authenticate using Twitter. |
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* |
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* @package simplesamlphp/simplesamlphp-module-authtwitter |
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*/ |
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class Twitter extends Auth\Source |
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{ |
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/** |
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* The string used to identify our states. |
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*/ |
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public const STAGE_INIT = 'twitter:init'; |
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/** |
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* The key of the AuthId field in the state. |
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*/ |
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public const AUTHID = 'twitter:AuthId'; |
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/** @var string */ |
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private string $key; |
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/** @var string */ |
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private string $secret; |
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/** @var string */ |
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private string $scope; |
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/** @var bool */ |
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private bool $force_login; |
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/** |
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* Constructor for this authentication source. |
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* |
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* @param array $info Information about this authentication source. |
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* @param array $config Configuration. |
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*/ |
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public function __construct(array $info, array $config) |
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{ |
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// Call the parent constructor first, as required by the interface |
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parent::__construct($info, $config); |
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$configObject = Configuration::loadFromArray( |
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$config, |
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'authsources[' . var_export($this->authId, true) . ']' |
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); |
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$this->key = $configObject->getString('key'); |
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$this->secret = $configObject->getString('secret'); |
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$this->scope = $configObject->getString('scope', null); |
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$this->force_login = $configObject->getBoolean('force_login', false); |
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} |
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/** |
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* Log-in using Twitter platform |
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* |
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* @param array &$state Information about the current authentication. |
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*/ |
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public function authenticate(array &$state): void |
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{ |
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$this->temporaryCredentials($state); |
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} |
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/** |
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* Retrieve temporary credentials |
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* |
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* @param array &$state Information about the current authentication. |
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*/ |
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private function temporaryCredentials(array &$state): void |
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{ |
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// We are going to need the authId in order to retrieve this authentication source later |
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$state[self::AUTHID] = $this->authId; |
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$stateId = base64_encode(Auth\State::saveState($state, self::STAGE_INIT)); |
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$server = new TwitterServer( |
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[ |
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'identifier' => $this->key, |
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'secret' => $this->secret, |
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'callback_uri' => Module::getModuleURL('authtwitter/linkback') |
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. '?AuthState=' . $stateId . '&force_login=' . strval($this->force_login), |
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'scope' => $this->scope, |
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] |
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); |
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// First part of OAuth 1.0 authentication is retrieving temporary credentials. |
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// These identify you as a client to the server. |
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$temporaryCredentials = $server->getTemporaryCredentials(); |
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$state['authtwitter:authdata:requestToken'] = serialize($temporaryCredentials); |
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Auth\State::saveState($state, self::STAGE_INIT); |
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$server->authorize($temporaryCredentials); |
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exit; |
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} |
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/** |
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* @param array &$state |
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* @param \Symfony\Component\HttpFoundation\Request $request |
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*/ |
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public function finalStep(array &$state, Request $request): void |
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{ |
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$requestToken = unserialize($state['authtwitter:authdata:requestToken']); |
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$oauth_token = $request->get('oauth_token'); |
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if ($oauth_token === null) { |
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throw new Error\BadRequest("Missing oauth_token parameter."); |
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} |
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if ($requestToken->getIdentifier() !== $oauth_token) { |
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throw new Error\BadRequest("Invalid oauth_token parameter."); |
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} |
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$oauth_verifier = $request->get('oauth_verifier'); |
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if ($oauth_verifier === null) { |
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throw new Error\BadRequest("Missing oauth_verifier parameter."); |
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} |
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$server = new TwitterServer( |
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[ |
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'identifier' => $this->key, |
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'secret' => $this->secret, |
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] |
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); |
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$tokenCredentials = $server->getTokenCredentials( |
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$requestToken, |
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$request->get('oauth_token'), |
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$request->get('oauth_verifier') |
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); |
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$state['token_credentials'] = serialize($tokenCredentials); |
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$userdata = $server->getUserDetails($tokenCredentials); |
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$attributes = []; |
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foreach ($userdata->getIterator() as $key => $value) { |
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if (is_string($value)) { |
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$attributes['twitter.' . $key] = [$value]; |
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} else { |
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// Either the urls or the extra array |
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} |
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} |
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foreach ($userdata->urls as $key => $value) { |
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if (is_string($value)) { |
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$attributes['twitter.' . $key] = [$value]; |
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} else { |
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// Something funky.. Maybe the API has changed? |
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} |
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} |
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foreach ($userdata->extra as $key => $value) { |
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if (is_string($value) || is_int($value)) { |
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$attributes['twitter.' . $key] = [strval($value)]; |
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} else { |
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// Something funky.. Maybe the API has changed? |
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} |
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} |
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$state['Attributes'] = $attributes; |
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} |
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} |
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simplesamlphp /
simplesamlphp-module-authtwitter
In general, usage of exit should be done with care and only when running in a scripting context like a CLI script.