1<?php 2 3/** 4 * webtrees: online genealogy 5 * Copyright (C) 2023 webtrees development team 6 * This program is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <https://www.gnu.org/licenses/>. 16 */ 17 18declare(strict_types=1); 19 20namespace Fisharebest\Webtrees\Http\Middleware; 21 22use Fisharebest\Webtrees\Validator; 23use Psr\Http\Message\ResponseInterface; 24use Psr\Http\Message\ServerRequestInterface; 25use Psr\Http\Server\MiddlewareInterface; 26use Psr\Http\Server\RequestHandlerInterface; 27 28/** 29 * Middleware to set security-related HTTP headers. 30 */ 31class SecurityHeaders implements MiddlewareInterface 32{ 33 private const array SECURITY_HEADERS = [ 34 'Permissions-Policy' => 'browsing-topics=()', 35 'Referrer-Policy' => 'same-origin', 36 'X-Content-Type-Options' => 'nosniff', 37 'X-Frame-Options' => 'SAMEORIGIN', 38 'X-XSS-Protection' => '1; mode=block', 39 ]; 40 41 /** 42 * @param ServerRequestInterface $request 43 * @param RequestHandlerInterface $handler 44 * 45 * @return ResponseInterface 46 */ 47 public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface 48 { 49 $response = $handler->handle($request); 50 51 foreach (self::SECURITY_HEADERS as $header_name => $header_value) { 52 // Don't overwrite existing headers. 53 if ($response->getHeader($header_name) === []) { 54 $response = $response->withHeader($header_name, $header_value); 55 } 56 } 57 58 $base_url = Validator::attributes($request)->string('base_url'); 59 60 if (str_starts_with($base_url, 'https://') && $response->getHeader('Strict-Transport-Security') === []) { 61 $response = $response->withHeader('Strict-Transport-Security', 'max-age=31536000'); 62 } 63 64 return $response; 65 } 66} 67