91 lines
2.3 KiB
PHP
91 lines
2.3 KiB
PHP
<?php
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/**
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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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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/**
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* Class TrustedDomain
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*
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* @package OC\Security
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*/
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class TrustedDomainHelper {
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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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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 $host without appended port
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*/
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private function getDomainWithoutPort($host) {
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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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* Checks whether a domain is considered as trusted from the list
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* of trusted domains. If no trusted domains have been configured, returns
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* true.
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* This is used to prevent Host Header Poisoning.
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* @param string $domainWithPort
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* @return bool true if the given domain is trusted or if no trusted domains
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* have been configured
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*/
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public function isTrustedDomain($domainWithPort) {
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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, $domain) === 1) {
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return true;
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}
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// Compare with port appended
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if(in_array($domainWithPort, $trustedList, true)) {
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return true;
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}
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return in_array($domain, $trustedList, true);
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}
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}
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