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<?php |
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declare(strict_types=1); |
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/* |
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* @copyright 2022 Christoph Wurst <[email protected]> |
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* |
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* @author 2022 Christoph Wurst <[email protected]> |
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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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// 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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nextcloud /
server
