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<?php |
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namespace Zefy\SimpleSSO; |
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use Zefy\SimpleSSO\Interfaces\SSOBrokerInterface; |
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/** |
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* Class SSOBroker. This class is only a skeleton. |
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* First of all, you need to implement abstract functions in your own class. |
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* Secondly, you should create a page which will be your SSO server. |
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* |
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* @package Zefy\SimpleSSO |
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*/ |
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abstract class SSOBroker implements SSOBrokerInterface |
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{ |
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/** |
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* SSO server url. |
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* |
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* @var string |
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*/ |
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protected $ssoServerUrl; |
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/** |
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* Broker name. |
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* |
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* @var string |
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*/ |
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protected $brokerName; |
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/** |
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* Broker secret token. |
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* |
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* @var string |
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*/ |
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protected $brokerSecret; |
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/** |
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* User info retrieved from the SSO server. |
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* |
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* @var array |
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*/ |
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protected $userInfo; |
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/** |
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* Random token generated for the client and broker. |
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* |
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* @var string|null |
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*/ |
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protected $token; |
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public function __construct() |
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{ |
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$this->setOptions(); |
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$this->saveToken(); |
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} |
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/** |
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* Attach client session to broker session in SSO server. |
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* |
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* @return void |
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*/ |
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public function attach() |
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{ |
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$parameters = [ |
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'return_url' => $this->getCurrentUrl(), |
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'broker' => $this->brokerName, |
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'token' => $this->token, |
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'checksum' => hash('sha256', 'attach' . $this->token . $this->brokerSecret) |
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]; |
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$attachUrl = $this->generateCommandUrl('attach', $parameters); |
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$this->redirect($attachUrl); |
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} |
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/** |
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* Getting user info from SSO based on client session. |
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* |
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* @return array |
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*/ |
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public function getUserInfo() |
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{ |
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if (!isset($this->userInfo) || empty($this->userInfo)) { |
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$this->userInfo = $this->makeRequest('GET', 'userInfo'); |
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} |
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return $this->userInfo; |
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} |
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/** |
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* Login client to SSO server with user credentials. |
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* |
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* @param string $username |
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* @param string $password |
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* |
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* @return bool |
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*/ |
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public function login(string $username, string $password) |
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{ |
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$this->userInfo = $this->makeRequest('POST', 'login', compact('username', 'password')); |
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if (!isset($this->userInfo['error']) && isset($this->userInfo['data']['id'])) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Logout client from SSO server. |
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* |
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* @return void |
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*/ |
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public function logout() |
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{ |
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$this->makeRequest('POST', 'logout'); |
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} |
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/** |
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* Generate request url. |
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* |
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* @param string $command |
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* @param array $parameters |
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* |
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* @return string |
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*/ |
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protected function generateCommandUrl(string $command, array $parameters = []) |
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{ |
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$query = ''; |
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if (!empty($parameters)) { |
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$query = '?' . http_build_query($parameters); |
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} |
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return $this->ssoServerUrl . '/sso/' . $command . $query; |
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} |
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/** |
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* Generate session key with broker name, broker secret and unique client token. |
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* |
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* @return string |
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*/ |
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protected function getSessionId() |
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{ |
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$checksum = hash('sha256', 'session' . $this->token . $this->brokerSecret); |
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return "SSO-{$this->brokerName}-{$this->token}-$checksum"; |
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} |
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/** |
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* Set base class options (sso server url, broker name and secret, etc). |
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* |
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* @return void |
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*/ |
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abstract protected function setOptions(); |
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/** |
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* Somehow save random token for client. |
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* |
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* @return void |
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*/ |
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abstract protected function saveToken(); |
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/** |
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* Delete saved token. |
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* |
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* @return void |
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*/ |
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abstract protected function deleteToken(); |
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/** |
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* Make request to SSO server. |
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* |
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* @param string $method Request method 'post' or 'get'. |
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* @param string $command Request command name. |
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* @param array $parameters Parameters for URL query string if GET request and form parameters if it's POST request. |
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* |
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* @return array |
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*/ |
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abstract protected function makeRequest(string $method, string $command, array $parameters = []); |
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/** |
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* Redirect client to specified url. |
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* |
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* @param string $url URL to be redirected. |
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* @param array $parameters HTTP query string. |
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* @param int $httpResponseCode HTTP response code for redirection. |
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* |
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* @return void |
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*/ |
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abstract protected function redirect(string $url, array $parameters = [], int $httpResponseCode = 307); |
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/** |
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* Getting current url which can be used as return to url. |
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* |
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* @return string |
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*/ |
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abstract protected function getCurrentUrl(); |
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} |
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