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<?php declare(strict_types=1);
namespace Shopware\Storefront\Framework\Csrf;
use Shopware\Core\Framework\Feature;
use Symfony\Component\HttpFoundation\Cookie;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\HttpFoundation\Session\Storage\SessionStorageFactoryInterface;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
/**
* @deprecated tag:v6.5.0 - class will be removed as the csrf system will be removed in favor for the samesite approach
*/
class CsrfPlaceholderHandler
{
public const CSRF_PLACEHOLDER = 'a48e.I7QSthHfDm9DSIu6qATnQS0abeWp4hr_ZiQt68VzkUM.e_s_1HaHTBgzLOLI_VGRJ0ZYFYPM11O0CmZruf008g5XgEDcS5E3WxYXxg007700">;
private CsrfTokenManagerInterface $csrfTokenManager;
private bool $csrfEnabled;
private string $csrfMode;
private RequestStack $requestStack;
private SessionStorageFactoryInterface $sessionFactory;
/**
* @internal
*/
public function __construct(CsrfTokenManagerInterface $csrfTokenManager, bool $csrfEnabled, string $csrfMode, RequestStack $requestStack, SessionStorageFactoryInterface $sessionFactory)
{
$this->csrfTokenManager = $csrfTokenManager;
$this->csrfEnabled = $csrfEnabled;
$this->csrfMode = $csrfMode;
$this->requestStack = $requestStack;
$this->sessionFactory = $sessionFactory;
}
public function replaceCsrfToken(Response $response, Request $request): Response
{
Feature::triggerDeprecationOrThrow(
'v6.5.0.0',
Feature::deprecatedClassMessage(__CLASS__, 'v6.5.0.0')
);
if ($response instanceof StreamedResponse) {
return $response;
}
if (!$this->csrfEnabled || $this->csrfMode !== CsrfModes::MODE_TWIG) {
return $response;
}
if ($response->getStatusCode() !== Response::HTTP_OK && $response->getStatusCode() !== Response::HTTP_NOT_FOUND) {
return $response;
}
$content = $response->getContent();
if ($content === false) {
return $response;
}
// Early return if the placeholder is not present in body to save cpu cycles with the regex
if (!\str_contains($content, self::CSRF_PLACEHOLDER)) {
return $response;
}
// Get session from session provider if not provided in session. This happens when the page is fully cached
$session = $request->hasSession() ? $request->getSession() : $this->createSession($request);
$request->setSession($session);
if ($session !== null) {
// StorefrontSubscriber did not run and set the session name. This can happen when the page is fully cached in the http cache
if (!$session->isStarted()) {
$session->setName('session-');
}
// The SessionTokenStorage gets the session from the RequestStack. This is at this moment empty as the Symfony request cycle did run already
$this->requestStack->push($request);
}
$processedIntents = [];
// https://regex101.com/r/fefx3V/1
$content = preg_replace_callback(
'/' . self::CSRF_PLACEHOLDER . '(?<intent>[^#]*)#/',
function ($matches) use ($response, $request, &$processedIntents) {
$intent = $matches['intent'];
$token = $processedIntents[$intent] ?? null;
// Don't generate the token and set the cookie again
if ($token === null) {
$token = $this->getToken($intent);
$cookie = Cookie::create('csrf[' . $intent . ']', $token);
$cookie->setSecureDefault($request->isSecure());
$response->headers->setCookie($cookie);
$processedIntents[$intent] = $token;
}
return $token;
},
$content
);
$response->setContent($content);
if ($session !== null) {
// Pop out the request injected some lines above. This is important for long running applications with roadrunner or swoole
$this->requestStack->pop();
}
return $response;
}
private function getToken(string $intent): string
{
return $this->csrfTokenManager->getToken($intent)->getValue();
}
private function createSession(Request $request): SessionInterface
{
$session = new Session($this->sessionFactory->createStorage($request));
$session->setName('session-');
$request->setSession($session);
return $session;
}
}

vendor/shopware/storefront/Framework/Csrf/CsrfPlaceholderHandler.php line 49