136 lines
3.1 KiB
PHP
136 lines
3.1 KiB
PHP
<?php defined('BLUDIT') or die('Bludit CMS.');
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class Security extends dbJSON
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{
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private $dbFields = array(
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'minutesBlocked'=>5,
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'numberFailuresAllowed'=>10,
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'blackList'=>array()
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);
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function __construct()
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{
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parent::__construct(PATH_DATABASES.'security.php');
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}
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// ====================================================
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// TOKEN FOR CSRF
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// ====================================================
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// Generate and save the token in Session.
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public function generateToken()
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{
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$token = Text::randomText(8);
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$token = sha1($token);
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Session::set('token', $token);
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}
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// Validate the token.
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public function validateToken($token)
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{
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$sessionToken = Session::get('token');
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return ( !empty($sessionToken) && ($sessionToken===$token) );
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}
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// Returns the token.
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public function getToken()
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{
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return Session::get('token');
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}
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public function printToken()
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{
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echo Session::get('token');
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}
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// ====================================================
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// BRUTE FORCE PROTECTION
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// ====================================================
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public function isBlocked()
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{
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$ip = $this->getUserIp();
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if(!isset($this->db['blackList'][$ip])) {
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return false;
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}
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$currentTime = time();
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$userBlack = $this->db['blackList'][$ip];
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$numberFailures = $userBlack['numberFailures'];
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$lastFailure = $userBlack['lastFailure'];
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// Check if the IP is expired, then is not blocked.
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if($currentTime > $lastFailure + ($this->db['minutesBlocked']*60)) {
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return false;
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}
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// The IP has more failures than number of failures, then the IP is blocked.
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if($numberFailures >= $this->db['numberFailuresAllowed']) {
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Log::set(__METHOD__.LOG_SEP.'IP Blocked:'.$ip);
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return true;
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}
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// Otherwise the IP is not blocked.
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return false;
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}
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public function addLoginFail()
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{
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$ip = $this->getUserIp();
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$currentTime = time();
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$numberFailures = 1;
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if(isset($this->db['blackList'][$ip]))
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{
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$userBlack = $this->db['blackList'][$ip];
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$lastFailure = $userBlack['lastFailure'];
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// Check if the IP is expired, then renew the number of failures.
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if($currentTime <= $lastFailure + ($this->db['minutesBlocked']*60))
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{
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$numberFailures = $userBlack['numberFailures'];
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$numberFailures = $numberFailures + 1;
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}
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}
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$this->db['blackList'][$ip] = array('lastFailure'=>$currentTime, 'numberFailures'=>$numberFailures);
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Log::set(__METHOD__.LOG_SEP.'Blacklist, IP:'.$ip.', Number of failures:'.$numberFailures);
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// Save the database
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if( $this->save() === false ) {
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Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to save the database file.');
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return false;
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}
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return true;
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}
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public function getNumberFailures($ip=null)
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{
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if(empty($ip)) {
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$ip = $this->getUserIp();
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}
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if(isset($this->db['blackList'][$ip])) {
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$userBlack = $this->db['blackList'][$ip];
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return $userBlack['numberFailures'];
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}
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}
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public function getUserIp()
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{
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// User IP
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if(getenv('HTTP_X_FORWARDED_FOR'))
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$ip = getenv('HTTP_X_FORWARDED_FOR');
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elseif(getenv('HTTP_CLIENT_IP'))
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$ip = getenv('HTTP_CLIENT_IP');
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else
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$ip = getenv('REMOTE_ADDR');
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return $ip;
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}
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} |