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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2023 Joas Schilling <coding@schilljs.com>
*
* @author Joas Schilling <coding@schilljs.com>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Security\Bruteforce\Backend;
use OCP\IDBConnection;
class DatabaseBackend implements IBackend {
private const TABLE_NAME = 'bruteforce_attempts';
public function __construct(
private IDBConnection $db,
) {
}
/**
* {@inheritDoc}
*/
public function getAttempts(
string $ipSubnet,
int $maxAgeTimestamp,
?string $action = null,
?array $metadata = null,
): int {
$query = $this->db->getQueryBuilder();
$query->select($query->func()->count('*', 'attempts'))
->from(self::TABLE_NAME)
->where($query->expr()->gt('occurred', $query->createNamedParameter($maxAgeTimestamp)))
->andWhere($query->expr()->eq('subnet', $query->createNamedParameter($ipSubnet)));
if ($action !== null) {
$query->andWhere($query->expr()->eq('action', $query->createNamedParameter($action)));
if ($metadata !== null) {
$query->andWhere($query->expr()->eq('metadata', $query->createNamedParameter(json_encode($metadata))));
}
}
$result = $query->executeQuery();
$row = $result->fetch();
$result->closeCursor();
return (int) $row['attempts'];
}
/**
* {@inheritDoc}
*/
public function resetAttempts(
string $ipSubnet,
?string $action = null,
?array $metadata = null,
): void {
$query = $this->db->getQueryBuilder();
$query->delete(self::TABLE_NAME)
->where($query->expr()->eq('subnet', $query->createNamedParameter($ipSubnet)));
if ($action !== null) {
$query->andWhere($query->expr()->eq('action', $query->createNamedParameter($action)));
if ($metadata !== null) {
$query->andWhere($query->expr()->eq('metadata', $query->createNamedParameter(json_encode($metadata))));
}
}
$query->executeStatement();
}
/**
* {@inheritDoc}
*/
public function registerAttempt(
string $ip,
string $ipSubnet,
int $timestamp,
string $action,
array $metadata = [],
): void {
$values = [
'ip' => $ip,
'subnet' => $ipSubnet,
'action' => $action,
'metadata' => json_encode($metadata),
'occurred' => $timestamp,
];
$qb = $this->db->getQueryBuilder();
$qb->insert(self::TABLE_NAME);
foreach ($values as $column => $value) {
$qb->setValue($column, $qb->createNamedParameter($value));
}
$qb->executeStatement();
}
}
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