1<?php 2 3/** 4 * webtrees: online genealogy 5 * Copyright (C) 2019 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 <http://www.gnu.org/licenses/>. 16 */ 17 18declare(strict_types=1); 19 20namespace Fisharebest\Webtrees\Http\Middleware; 21 22use Fig\Http\Message\RequestMethodInterface; 23use Fisharebest\Webtrees\FlashMessages; 24use Fisharebest\Webtrees\Http\RequestHandlers\Logout; 25use Fisharebest\Webtrees\Http\RequestHandlers\SelectLanguage; 26use Fisharebest\Webtrees\Http\RequestHandlers\SelectTheme; 27use Fisharebest\Webtrees\I18N; 28use Fisharebest\Webtrees\Session; 29use Psr\Http\Message\ResponseInterface; 30use Psr\Http\Message\ServerRequestInterface; 31use Psr\Http\Server\MiddlewareInterface; 32use Psr\Http\Server\RequestHandlerInterface; 33 34use function in_array; 35 36/** 37 * Middleware to wrap a request in a transaction. 38 */ 39class CheckCsrf implements MiddlewareInterface 40{ 41 private const EXCLUDE_ROUTES = [ 42 Logout::class, 43 SelectLanguage::class, 44 SelectTheme::class, 45 ]; 46 47 /** 48 * @param ServerRequestInterface $request 49 * @param RequestHandlerInterface $handler 50 * 51 * @return ResponseInterface 52 */ 53 public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface 54 { 55 if ($request->getMethod() === RequestMethodInterface::METHOD_POST) { 56 $route = $request->getAttribute('route'); 57 58 if (!in_array($route->name, self::EXCLUDE_ROUTES, true)) { 59 $params = (array) $request->getParsedBody(); 60 $client_token = $params['_csrf'] ?? $request->getHeaderLine('X-CSRF-TOKEN'); 61 $session_token = Session::get('CSRF_TOKEN'); 62 63 unset($params['_csrf']); 64 65 $request = $request->withParsedBody($params); 66 67 if ($client_token !== $session_token) { 68 FlashMessages::addMessage(I18N::translate('This form has expired. Try again.')); 69 70 return redirect((string) $request->getUri()); 71 } 72 } 73 } 74 75 return $handler->handle($request); 76 } 77} 78