114 lines
4.8 KiB
PHP
114 lines
4.8 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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namespace TYPO3\CMS\Frontend\Middleware;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Http\Message\ServerRequestInterface;
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use Psr\Http\Server\MiddlewareInterface;
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use Psr\Http\Server\RequestHandlerInterface;
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use Psr\Log\LoggerInterface;
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use Symfony\Component\DependencyInjection\Attribute\Autowire;
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use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
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use TYPO3\CMS\Core\Core\RequestId;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Configuration\CspConfigurationFactory;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\DirectiveHashCollection;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Middleware\PolicyBag;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Middleware\ResponseService;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\PolicyProvider;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Scope;
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use TYPO3\CMS\Core\Site\Entity\Site;
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/**
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* Adds Content-Security-Policy headers to response.
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*
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* @internal
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*/
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final readonly class ContentSecurityPolicyHeaders implements MiddlewareInterface
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{
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public function __construct(
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private RequestId $requestId,
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private LoggerInterface $logger,
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#[Autowire(service: 'cache.assets')]
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private FrontendInterface $cache,
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private PolicyProvider $policyProvider,
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private CspConfigurationFactory $cspConfigurationFactory,
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private ResponseService $responseService,
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private DirectiveHashCollection $directiveHashCollection,
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) {}
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
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{
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return $this->applyContentSecurityPolicy($request, $handler);
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}
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/**
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* Apply Content-Security-Policy headers to an error response that bypassed
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* the normal middleware stack (e.g. responses from ErrorController).
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*/
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public function applyToResponse(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
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{
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return $this->applyContentSecurityPolicy($request, $response);
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}
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private function applyContentSecurityPolicy(ServerRequestInterface $request, ResponseInterface|RequestHandlerInterface $subject): ResponseInterface
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{
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$site = $request->getAttribute('site');
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$cspConfiguration = $site instanceof Site ? ($site->getConfiguration()['contentSecurityPolicies'] ?? []) : [];
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$dispositionMap = $this->cspConfigurationFactory->buildDispositionMap($cspConfiguration);
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$behavior = $this->cspConfigurationFactory->buildBehavior($cspConfiguration);
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// return early in case CSP shall not be used
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if ($dispositionMap->keys() === []) {
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return $subject instanceof RequestHandlerInterface ? $subject->handle($request) : $subject;
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}
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$scope = Scope::frontendSite($site);
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$nonce = $this->requestId->nonce;
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$policyBag = new PolicyBag($scope, $dispositionMap, $behavior, $nonce, $this->directiveHashCollection);
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// make sure, the nonce value is set before processing the remaining components
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$request = $request
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->withAttribute('nonce', $nonce)
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->withAttribute('csp.policyBag', $policyBag);
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$response = $subject instanceof RequestHandlerInterface ? $subject->handle($request) : $subject;
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if ($response->hasHeader('Content-Security-Policy') || $response->hasHeader('Content-Security-Policy-Report-Only')) {
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if ($subject instanceof RequestHandlerInterface) {
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$this->logger->info('Content-Security-Policy not enforced due to existence of custom header', [
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'scope' => (string)$scope,
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'uri' => (string)$request->getUri(),
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]);
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}
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return $response;
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}
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$processedEarlier = $policyBag->hasPolicies();
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$this->policyProvider->prepare($policyBag, $request, $response);
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foreach ($dispositionMap as $disposition => $dispositionConfiguration) {
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$policy = $policyBag->getPolicy($disposition);
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if ($policy->isEmpty()) {
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continue;
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}
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$response = $response->withHeader(
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$disposition->getHttpHeaderName(),
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$policy->compile($policyBag, $this->cache)
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);
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}
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if (!$processedEarlier && $policyBag->behavior->useNonce === false) {
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$response = $this->responseService->dropNonceFromHtmlResponse($response, $nonce);
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}
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return $response;
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}
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}
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