Kumi
98a7e42c15
Switched 'img-src' directive to only allow 'self', and removed the wildcard '*' and 'data:' source settings. This adjustment enhances security by restricting image sources to the same origin, preventing potential exploitation from arbitrary or data URLs.
72 lines
1.9 KiB
PHP
72 lines
1.9 KiB
PHP
<?php
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namespace Alltube\Middleware;
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use Alltube\Config;
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use ParagonIE\CSPBuilder\CSPBuilder;
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use Psr\Container\ContainerInterface;
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use Psr\Http\Message\MessageInterface;
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use Slim\Http\Request;
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use Slim\Http\Response;
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/**
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* Class CspMiddleware
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* @package Alltube
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*/
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class CspMiddleware
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{
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/**
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* @var Config
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*/
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private $config;
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/**
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* CspMiddleware constructor.
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* @param ContainerInterface $container
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*/
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public function __construct(ContainerInterface $container)
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{
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$this->config = $container->get('config');
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}
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/**
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* @param Response $response
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* @return MessageInterface
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*/
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public function applyHeader(Response $response): MessageInterface
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{
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$csp = new CSPBuilder();
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$csp->disableOldBrowserSupport()
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->addDirective('default-src', [])
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->addDirective('font-src', ['self' => true])
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->addDirective('style-src', ['self' => true])
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->addDirective('manifest-src', ['self' => true])
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->addDirective('img-src', ['self' => true])
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->addDirective('base-uri', [])
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->addDirective('frame-ancestors', [])
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->addSource('form-action', '*')
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->addSource('img-src', '*')
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->addSource('img-src', 'data:');
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if ($this->config->debug) {
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// So maximebf/debugbar, symfony/debug and symfony/error-handler can work.
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$csp->setDirective('script-src', ['self' => true, 'unsafe-inline' => true])
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->setDirective('style-src', ['self' => true, 'unsafe-inline' => true]);
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}
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return $csp->injectCSPHeader($response);
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}
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/**
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* @param Request $request
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* @param Response $response
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* @param callable $next
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* @return mixed
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*/
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public function __invoke(Request $request, Response $response, callable $next)
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{
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$response = $this->applyHeader($response);
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return $next($request, $response);
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}
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}
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