mirror of https://github.com/nextcloud/server
119 lines
3.1 KiB
PHP
119 lines
3.1 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author J0WI <J0WI@users.noreply.github.com>
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* @author Johannes Ernst <jernst@indiecomputing.com>
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* @author Julius Härtl <jus@bitgrid.net>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Security;
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use OC\AppFramework\Http\Request;
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use OCP\IConfig;
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use OCP\Security\ITrustedDomainHelper;
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class TrustedDomainHelper implements ITrustedDomainHelper {
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/** @var IConfig */
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private $config;
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/**
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* @param IConfig $config
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*/
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public function __construct(IConfig $config) {
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$this->config = $config;
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}
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/**
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* Strips a potential port from a domain (in format domain:port)
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* @param string $host
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* @return string $host without appended port
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*/
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private function getDomainWithoutPort(string $host): string {
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$pos = strrpos($host, ':');
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if ($pos !== false) {
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$port = substr($host, $pos + 1);
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if (is_numeric($port)) {
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$host = substr($host, 0, $pos);
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}
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}
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return $host;
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}
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/**
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* {@inheritDoc}
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*/
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public function isTrustedUrl(string $url): bool {
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$parsedUrl = parse_url($url);
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if (empty($parsedUrl['host'])) {
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return false;
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}
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if (isset($parsedUrl['port']) && $parsedUrl['port']) {
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return $this->isTrustedDomain($parsedUrl['host'] . ':' . $parsedUrl['port']);
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}
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return $this->isTrustedDomain($parsedUrl['host']);
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}
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/**
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* {@inheritDoc}
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*/
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public function isTrustedDomain(string $domainWithPort): bool {
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// overwritehost is always trusted
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if ($this->config->getSystemValue('overwritehost') !== '') {
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return true;
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}
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$domain = $this->getDomainWithoutPort($domainWithPort);
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// Read trusted domains from config
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$trustedList = $this->config->getSystemValue('trusted_domains', []);
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if (!is_array($trustedList)) {
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return false;
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}
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// Always allow access from localhost
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if (preg_match(Request::REGEX_LOCALHOST, $domain) === 1) {
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return true;
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}
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// Reject misformed domains in any case
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if (strpos($domain, '-') === 0 || strpos($domain, '..') !== false) {
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return false;
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}
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// Match, allowing for * wildcards
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foreach ($trustedList as $trusted) {
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if (gettype($trusted) !== 'string') {
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break;
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}
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$regex = '/^' . implode('[-\.a-zA-Z0-9]*', array_map(function ($v) {
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return preg_quote($v, '/');
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}, explode('*', $trusted))) . '$/i';
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if (preg_match($regex, $domain) || preg_match($regex, $domainWithPort)) {
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return true;
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}
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}
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return false;
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}
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}
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