84 lines
3.5 KiB
PHP
84 lines
3.5 KiB
PHP
<?php
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if (!defined('GNUSOCIAL')) { exit(1); }
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class AntiBrutePlugin extends Plugin {
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const PLUGIN_VERSION = '2.0.0';
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protected $failed_attempts = 0;
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protected $unauthed_user = null;
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protected $client_ip = null;
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const FAILED_LOGIN_IP_SECTION = 'failed_login_ip';
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public function initialize()
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{
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// This probably needs some work. For example with IPv6 you can easily generate new IPs...
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$client_ip = common_client_ip();
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$this->client_ip = $client_ip[0] ?: $client_ip[1]; // [0] is proxy, [1] should be the real IP
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}
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public function onStartCheckPassword($nickname, $password, &$authenticatedUser)
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{
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if (common_is_email($nickname)) {
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$this->unauthed_user = User::getKV('email', common_canonical_email($nickname));
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} else {
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$this->unauthed_user = User::getKV('nickname', Nickname::normalize($nickname));
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}
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if (!$this->unauthed_user instanceof User) {
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// Unknown username continue processing StartCheckPassword (maybe uninitialized LDAP user etc?)
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return true;
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}
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$this->failed_attempts = (int)$this->unauthed_user->getPref(self::FAILED_LOGIN_IP_SECTION, $this->client_ip);
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switch (true) {
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case $this->failed_attempts >= 5:
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common_log(LOG_WARNING, sprintf('Multiple failed login attempts for user %s from IP %s - brute force attack?',
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$this->unauthed_user->getNickname(), $this->client_ip));
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// 5 seconds is a good max waiting time anyway...
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sleep($this->failed_attempts % 5 + 1);
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break;
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case $this->failed_attempts > 0:
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common_debug(sprintf('Previously failed login on user %s from IP %s - sleeping %u seconds.',
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$this->unauthed_user->getNickname(), $this->client_ip, $this->failed_attempts));
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sleep($this->failed_attempts);
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break;
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default:
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// No sleeping if it's our first failed attempt.
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}
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return true;
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}
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public function onEndCheckPassword($nickname, $password, $authenticatedUser)
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{
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if ($authenticatedUser instanceof User) {
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// We'll trust this IP for this user and remove failed logins for the database..
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$authenticatedUser->delPref(self::FAILED_LOGIN_IP_SECTION, $this->client_ip);
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return true;
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}
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// See if we have an unauthed user from before. If not, it might be because the User did
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// not exist yet (such as autoregistering with LDAP, OpenID etc.).
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if ($this->unauthed_user instanceof User) {
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// And if the login failed, we'll increment the attempt count.
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common_debug(sprintf('Failed login tests for user %s from IP %s',
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$this->unauthed_user->getNickname(), $this->client_ip));
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$this->unauthed_user->setPref(self::FAILED_LOGIN_IP_SECTION, $this->client_ip, ++$this->failed_attempts);
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}
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return true;
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}
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public function onPluginVersion(array &$versions): bool
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{
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$versions[] = array('name' => 'AntiBrute',
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'version' => self::PLUGIN_VERSION,
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'author' => 'Mikael Nordfeldth',
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'homepage' => GNUSOCIAL_ENGINE_URL,
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'description' =>
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// TRANS: Plugin description.
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_m('Anti bruteforce method(s).'));
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return true;
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}
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}
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