3 if (!defined('GNUSOCIAL')) { exit(1); }
5 class AntiBrutePlugin extends Plugin {
6 protected $failed_attempts = 0;
7 protected $unauthed_user = null;
8 protected $client_ip = null;
10 const FAILED_LOGIN_IP_SECTION = 'failed_login_ip';
12 public function onStartCheckPassword($nickname, $password, &$authenticatedUser)
14 if (common_is_email($nickname)) {
15 $this->unauthed_user = User::getKV('email', common_canonical_email($nickname));
17 $this->unauthed_user = User::getKV('nickname', Nickname::normalize($nickname));
20 if (!$this->unauthed_user instanceof User) {
21 // Unknown username continue processing StartCheckPassword (maybe uninitialized LDAP user etc?)
25 // This probably needs some work. For example with IPv6 you can easily generate new IPs...
26 $this->client_ip = common_client_ip()[0] ?: common_client_ip()[1]; // [0] is proxy, [1] should be the real IP
27 $this->failed_attempts = (int)$this->unauthed_user->getPref(self::FAILED_LOGIN_IP_SECTION, $this->client_ip);
29 case $this->failed_attempts >= 5:
30 common_log(LOG_WARNING, sprintf('Multiple failed login attempts for user %s from IP %s - brute force attack?',
31 $this->unauthed_user->getNickname(), $this->client_ip));
32 // 5 seconds is a good max waiting time anyway...
33 sleep($this->failed_attempts % 5 + 1);
35 case $this->failed_attempts > 0:
36 common_debug(sprintf('Previously failed login on user %s from IP %s - sleeping %u seconds.',
37 $this->unauthed_user->getNickname(), $this->client_ip, $this->failed_attempts));
38 sleep($this->failed_attempts);
41 // No sleeping if it's our first failed attempt.
47 public function onEndCheckPassword($nickname, $password, $authenticatedUser)
49 if ($authenticatedUser instanceof User) {
50 // We'll trust this IP for this user and remove failed logins for the database..
51 $authenticatedUser->delPref(self::FAILED_LOGIN_IP_SECTION, $this->client_ip);
55 // See if we have an unauthed user from before. If not, it might be because the User did
56 // not exist yet (such as autoregistering with LDAP, OpenID etc.).
57 if ($this->unauthed_user instanceof User) {
58 // And if the login failed, we'll increment the attempt count.
59 common_debug(sprintf('Failed login tests for user %s from IP %s',
60 $this->unauthed_user->getNickname(), $this->client_ip));
61 $this->unauthed_user->setPref(self::FAILED_LOGIN_IP_SECTION, $this->client_ip, ++$this->failed_attempts);
66 public function onPluginVersion(&$versions)
68 $versions[] = array('name' => 'AntiBrute',
69 'version' => GNUSOCIAL_VERSION,
70 'author' => 'Mikael Nordfeldth',
71 'homepage' => 'http://gnu.io/',
73 // TRANS: Plugin description.
74 _m('Anti bruteforce method(s).'));