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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Plugins\Login\Security;
use Piwik\Common;
use Piwik\Date;
use Piwik\Db;
use Piwik\Plugins\Login\SystemSettings;
use Piwik\Updater;
use Piwik\Version;
class BruteForceDetection {
private $minutesTimeRange;
private $maxLogAttempts;
private $table = 'brute_force_log';
private $tablePrefixed = '';
/**
* @var SystemSettings
*/
private $settings;
/**
* @var Updater
*/
private $updater;
public function __construct(SystemSettings $systemSettings)
{
$this->tablePrefixed = Common::prefixTable($this->table);
$this->settings = $systemSettings;
$this->minutesTimeRange = $systemSettings->loginAttemptsTimeRange->getValue();
$this->maxLogAttempts = $systemSettings->maxFailedLoginsPerMinutes->getValue();
$this->updater = new Updater();
}
public function isEnabled()
{
$dbSchemaVersion = $this->updater->getCurrentComponentVersion('core');
if ($dbSchemaVersion && version_compare($dbSchemaVersion, '3.8.0') == -1) {
return false; // do not enable brute force detection before the tables exist
}
return $this->settings->enableBruteForceDetection->getValue();
}
public function addFailedAttempt($ipAddress)
{
$now = $this->getNow()->getDatetime();
$db = Db::get();
$db->query('INSERT INTO '.$this->tablePrefixed.' (ip_address, attempted_at) VALUES(?,?)', array($ipAddress, $now));
}
public function isAllowedToLogin($ipAddress)
{
if ($this->settings->isBlacklistedIp($ipAddress)) {
return false;
}
if ($this->settings->isWhitelistedIp($ipAddress)) {
return true;
}
$db = Db::get();
$startTime = $this->getStartTimeRange();
$sql = 'SELECT count(*) as numLogins FROM '.$this->tablePrefixed.' WHERE ip_address = ? AND attempted_at > ?';
$numLogins = $db->fetchOne($sql, array($ipAddress, $startTime));
return empty($numLogins) || $numLogins <= $this->maxLogAttempts;
}
public function getCurrentlyBlockedIps()
{
$sql = 'SELECT ip_address
FROM ' . $this->tablePrefixed . '
WHERE attempted_at > ?
GROUP BY ip_address
HAVING count(*) > ' . (int) $this->maxLogAttempts;
$rows = Db::get()->fetchAll($sql, array($this->getStartTimeRange()));
$ips = array();
foreach ($rows as $row) {
if ($this->settings->isWhitelistedIp($row['ip_address'])) {
continue;
}
$ips[] = $row['ip_address'];
}
return $ips;
}
public function unblockIp($ip)
{
// we only delete where attempted_at was recent and keep other IPs for history purposes
Db::get()->query('DELETE FROM '.$this->tablePrefixed.' WHERE ip_address = ? and attempted_at > ?', array($ip, $this->getStartTimeRange()));
}
public function cleanupOldEntries()
{
// we delete all entries older than 7 days (or more if more attempts are logged)
$minutesAutoDelete = 10080;
$minutes = max($minutesAutoDelete, $this->minutesTimeRange);
$deleteOlderDate = $this->getDateTimeSubMinutes($minutes);
Db::get()->query('DELETE FROM '.$this->tablePrefixed.' WHERE attempted_at < ?', array($deleteOlderDate));
}
/**
* @internal tests only
*/
public function deleteAll()
{
return Db::query('DELETE FROM ' . $this->tablePrefixed);
}
/**
* @internal tests only
*/
public function getAll()
{
return Db::get()->fetchAll('SELECT * FROM ' . $this->tablePrefixed);
}
protected function getNow()
{
return Date::now();
}
private function getStartTimeRange()
{
return $this->getDateTimeSubMinutes($this->minutesTimeRange);
}
private function getDateTimeSubMinutes($minutes)
{
return $this->getNow()->subPeriod($minutes, 'minute')->getDatetime();
}
}
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