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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 $sessionStarted = false;
- private $namespace;
- /**
- * Initializes the storage with a session namespace.
- *
- * @param string $namespace The namespace under which the token is stored in the session
- */
- public function __construct(string $namespace = self::SESSION_NAMESPACE)
- {
- $this->namespace = $namespace;
- }
- /**
- * {@inheritdoc}
- */
- public function getToken(string $tokenId)
- {
- if (!$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];
- }
- /**
- * {@inheritdoc}
- */
- public function setToken(string $tokenId, string $token)
- {
- if (!$this->sessionStarted) {
- $this->startSession();
- }
- $_SESSION[$this->namespace][$tokenId] = $token;
- }
- /**
- * {@inheritdoc}
- */
- public function hasToken(string $tokenId)
- {
- if (!$this->sessionStarted) {
- $this->startSession();
- }
- return isset($_SESSION[$this->namespace][$tokenId]);
- }
- /**
- * {@inheritdoc}
- */
- public function removeToken(string $tokenId)
- {
- if (!$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 $token;
- }
- /**
- * {@inheritdoc}
- */
- public function clear()
- {
- unset($_SESSION[$this->namespace]);
- }
- private function startSession()
- {
- if (\PHP_SESSION_NONE === session_status()) {
- session_start();
- }
- $this->sessionStarted = true;
- }
- }
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