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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\Form\Extension\Csrf\CsrfProvider;
- @trigger_error('The '.__NAMESPACE__.'\DefaultCsrfProvider is deprecated since Symfony 2.4 and will be removed in version 3.0. Use the \Symfony\Component\Security\Csrf\TokenStorage\NativeSessionTokenStorage class instead.', E_USER_DEPRECATED);
- /**
- * Default implementation of CsrfProviderInterface.
- *
- * This provider uses the session ID returned by session_id() as well as a
- * user-defined secret value to secure the CSRF token.
- *
- * @author Bernhard Schussek <bschussek@gmail.com>
- *
- * @deprecated since version 2.4, to be removed in 3.0.
- * Use {@link \Symfony\Component\Security\Csrf\CsrfTokenManager} in
- * combination with {@link \Symfony\Component\Security\Csrf\TokenStorage\NativeSessionTokenStorage}
- * instead.
- */
- class DefaultCsrfProvider implements CsrfProviderInterface
- {
- protected $secret;
- /**
- * Initializes the provider with a secret value.
- *
- * A recommended value for the secret is a generated value with at least
- * 32 characters and mixed letters, digits and special characters.
- *
- * @param string $secret A secret value included in the CSRF token
- */
- public function __construct($secret)
- {
- $this->secret = $secret;
- }
- /**
- * {@inheritdoc}
- */
- public function generateCsrfToken($intention)
- {
- return sha1($this->secret.$intention.$this->getSessionId());
- }
- /**
- * {@inheritdoc}
- */
- public function isCsrfTokenValid($intention, $token)
- {
- $expectedToken = $this->generateCsrfToken($intention);
- return hash_equals($expectedToken, $token);
- }
- /**
- * Returns the ID of the user session.
- *
- * Automatically starts the session if necessary.
- *
- * @return string The session ID
- */
- protected function getSessionId()
- {
- if (\PHP_VERSION_ID >= 50400) {
- if (PHP_SESSION_NONE === session_status()) {
- session_start();
- }
- } elseif (!session_id()) {
- session_start();
- }
- return session_id();
- }
- }
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