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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Security\Csrf\TokenStorage; use Symfony\Component\Security\Csrf\Exception\TokenNotFoundException; /** * Token storage that uses PHP's native session handling. * * @author Bernhard Schussek <bschussek@gmail.com> */ class NativeSessionTokenStorage implements ClearableTokenStorageInterface { /** * The namespace used to store values in the session. */ public const SESSION_NAMESPACE = '_csrf'; private bool $sessionStarted = false; /** * Initializes the storage with a session namespace. * * @param string $namespace The namespace under which the token is stored in the session */ public function __construct( private string $namespace = self::SESSION_NAMESPACE, ) { } public function getToken(string $tokenId): string { if (!$this->sessionStarted) { $this->startSession(); } if (!isset($_SESSION[$this->namespace][$tokenId])) { throw new TokenNotFoundException('The CSRF token with ID '.$tokenId.' does not exist.'); } return (string) $_SESSION[$this->namespace][$tokenId]; } public function setToken(string $tokenId, #[\SensitiveParameter] string $token): void { if (!$this->sessionStarted) { $this->startSession(); } $_SESSION[$this->namespace][$tokenId] = $token; } public function hasToken(string $tokenId): bool { if (!$this->sessionStarted) { $this->startSession(); } return isset($_SESSION[$this->namespace][$tokenId]); } public function removeToken(string $tokenId): ?string { if (!$this->sessionStarted) { $this->startSession(); } if (!isset($_SESSION[$this->namespace][$tokenId])) { return null; } $token = (string) $_SESSION[$this->namespace][$tokenId]; unset($_SESSION[$this->namespace][$tokenId]); if (!$_SESSION[$this->namespace]) { unset($_SESSION[$this->namespace]); } return $token; } public function clear(): void { unset($_SESSION[$this->namespace]); } private function startSession(): void { if (\PHP_SESSION_NONE === session_status()) { session_start(); } $this->sessionStarted = true; } }
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