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80 lines
2.3 KiB
PHP
80 lines
2.3 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* @copyright 2022 Christoph Wurst <christoph@winzerhof-wurst.at>
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*
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* @author 2022 Christoph Wurst <christoph@winzerhof-wurst.at>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program 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 as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OC\Security;
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use OC\Net\HostnameClassifier;
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use OC\Net\IpAddressClassifier;
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use OCP\IConfig;
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use OCP\Security\IRemoteHostValidator;
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use Psr\Log\LoggerInterface;
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use function strpos;
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use function strtolower;
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use function substr;
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use function urldecode;
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/**
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* @internal
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*/
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final class RemoteHostValidator implements IRemoteHostValidator {
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private IConfig $config;
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private HostnameClassifier $hostnameClassifier;
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private IpAddressClassifier $ipAddressClassifier;
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private LoggerInterface $logger;
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public function __construct(IConfig $config,
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HostnameClassifier $hostnameClassifier,
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IpAddressClassifier $ipAddressClassifier,
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LoggerInterface $logger) {
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$this->config = $config;
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$this->hostnameClassifier = $hostnameClassifier;
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$this->ipAddressClassifier = $ipAddressClassifier;
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$this->logger = $logger;
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}
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public function isValid(string $host): bool {
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if ($this->config->getSystemValueBool('allow_local_remote_servers', false)) {
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return true;
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}
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$host = idn_to_utf8(strtolower(urldecode($host)));
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if ($host === false) {
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return false;
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}
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// Remove brackets from IPv6 addresses
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if (strpos($host, '[') === 0 && substr($host, -1) === ']') {
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$host = substr($host, 1, -1);
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}
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if ($this->hostnameClassifier->isLocalHostname($host)
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|| $this->ipAddressClassifier->isLocalAddress($host)) {
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$this->logger->warning("Host $host was not connected to because it violates local access rules");
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return false;
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}
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return true;
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}
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}
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