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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;
use Symfony\Component\Security\Csrf\TokenGenerator\UriSafeTokenGenerator;
use Symfony\Component\Security\Csrf\TokenGenerator\TokenGeneratorInterface;
use Symfony\Component\Security\Csrf\TokenStorage\NativeSessionTokenStorage;
use Symfony\Component\Security\Csrf\TokenStorage\TokenStorageInterface;
/**
* Default implementation of {@link CsrfTokenManagerInterface}.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class CsrfTokenManager implements CsrfTokenManagerInterface
{
/**
* @var TokenGeneratorInterface
*/
private $generator;
/**
* @var TokenStorageInterface
*/
private $storage;
/**
* Creates a new CSRF provider using PHP's native session storage.
*
* @param TokenGeneratorInterface|null $generator The token generator
* @param TokenStorageInterface|null $storage The storage for storing
* generated CSRF tokens
*/
public function __construct(TokenGeneratorInterface $generator = null, TokenStorageInterface $storage = null)
{
$this->generator = $generator ?: new UriSafeTokenGenerator();
$this->storage = $storage ?: new NativeSessionTokenStorage();
}
/**
* {@inheritdoc}
*/
public function getToken($tokenId)
{
if ($this->storage->hasToken($tokenId)) {
$value = $this->storage->getToken($tokenId);
} else {
$value = $this->generator->generateToken();
$this->storage->setToken($tokenId, $value);
}
return new CsrfToken($tokenId, $value);
}
/**
* {@inheritdoc}
*/
public function refreshToken($tokenId)
{
$value = $this->generator->generateToken();
$this->storage->setToken($tokenId, $value);
return new CsrfToken($tokenId, $value);
}
/**
* {@inheritdoc}
*/
public function removeToken($tokenId)
{
return $this->storage->removeToken($tokenId);
}
/**
* {@inheritdoc}
*/
public function isTokenValid(CsrfToken $token)
{
if (!$this->storage->hasToken($token->getId())) {
return false;
}
return hash_equals($this->storage->getToken($token->getId()), $token->getValue());
}
}
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