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<?php |
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namespace Faulancer\Security; |
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use Faulancer\ServiceLocator\ServiceInterface; |
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use Faulancer\ServiceLocator\ServiceLocator; |
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use Faulancer\Session\SessionManager; |
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/** |
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* Class Csrf |
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* |
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* @package Faulancer\Security |
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* @author Florian Knapp <[email protected]> |
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*/ |
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class Csrf |
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{ |
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/** |
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* Generates a token and save it to session |
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* |
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* @param string $identifier |
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* |
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* @return string |
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*/ |
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public static function getToken(string $identifier = '') :string |
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{ |
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$token = self::_getSessionManager()->get('csrf' . $identifier); |
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if (!self::_getSessionManager()->has('csrf' . $identifier)) { |
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$token = bin2hex(openssl_random_pseudo_bytes(16)); |
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self::saveToSession($token, $identifier); |
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} |
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return $token; |
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} |
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/** |
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* Check if token is valid |
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* |
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* @param string $token |
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* @param string $identifier |
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* |
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* @return bool |
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*/ |
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public static function isValid(string $token, string $identifier = '') :bool |
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{ |
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$sessionToken = self::_getSessionManager()->get('csrf' . $identifier); |
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$isValid = $token === $sessionToken; |
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if ($isValid) { |
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self::_getSessionManager()->delete('csrf' . $identifier); |
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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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* Saves token into session |
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* |
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* @param string $token |
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* @param string $identifier |
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* |
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* @return void |
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*/ |
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private static function saveToSession(string $token, string $identifier = '') |
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{ |
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self::_getSessionManager()->set('csrf' . $identifier, $token); |
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} |
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/** |
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* @return SessionManager|ServiceInterface |
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*/ |
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private static function _getSessionManager() |
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{ |
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return ServiceLocator::instance()->get(SessionManager::class); |
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} |
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} |
FloKnapp /
faulancer
