TYPO3 v15 dev-main snapshot ()

Classes/Middleware/ContentSecurityPolicyHeaders.php

@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+namespace TYPO3\CMS\Backend\Middleware;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
+use TYPO3\CMS\Core\Core\RequestId;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Configuration\Behavior;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Configuration\DispositionConfiguration;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\DirectiveHashCollection;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Disposition;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Middleware\PolicyBag;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Middleware\ResponseService;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\PolicyProvider;
+use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Scope;
+use TYPO3\CMS\Core\Type\Map;
+
+/**
+ * Adds Content-Security-Policy headers to response.
+ *
+ * @internal
+ */
+final readonly class ContentSecurityPolicyHeaders implements MiddlewareInterface
+{
+    public function __construct(
+        private RequestId $requestId,
+        private LoggerInterface $logger,
+        #[Autowire(service: 'cache.assets')]
+        private FrontendInterface $cache,
+        private PolicyProvider $policyProvider,
+        private ResponseService $responseService,
+        private DirectiveHashCollection $directiveHashCollection,
+    ) {}
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        $scope = Scope::backend();
+        $nonce = $this->requestId->nonce;
+        $request = $request->withAttribute('nonce', $nonce);
+        $response = $handler->handle($request);
+        $disposition = Disposition::enforce;
+        $dispositionMap = new Map();
+        $dispositionMap[$disposition] = new DispositionConfiguration(
+            true,
+            true,
+            $GLOBALS['TYPO3_CONF_VARS'][$scope->type->abbreviate()]['contentSecurityPolicyReportingUrl'],
+        );
+        $policyBag = new PolicyBag($scope, $dispositionMap, new Behavior(), $nonce, $this->directiveHashCollection);
+
+        if ($response->hasHeader('Content-Security-Policy') || $response->hasHeader('Content-Security-Policy-Report-Only')) {
+            $this->logger->info('Content-Security-Policy not enforced due to existence of custom header', [
+                'scope' => (string)$scope,
+                'uri' => (string)$request->getUri(),
+            ]);
+            return $response;
+        }
+        $this->policyProvider->prepare($policyBag, $request, $response);
+        $policy = $policyBag->getPolicy($disposition);
+        if ($policy->isEmpty()) {
+            return $response;
+        }
+        if ($policyBag->behavior->useNonce === false) {
+            $response = $this->responseService->dropNonceFromHtmlResponse($response, $nonce);
+        }
+        return $response->withHeader(
+            $disposition->getHttpHeaderName(),
+            $policy->compile($policyBag, $this->cache)
+        );
+    }
+}