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Editing: CLIENT.php

<?php

class CLIENT
{

const UTYPE = 'LSWS' ;

private $id = '' ;
    private $id_field = "lsws_uid" ;
    private $pass = '' ;
    private $pass_field = "lsws_pass" ;
    private $secret = null ;
    private $token = '' ;
    private $timeout = 0 ;
    private $valid = false ;
    private $changed = false ;
    //limit array size per stat..
    private $stat_limit = 60 ;
    private static $_instance = null ;

// prevent an object from being constructed
    private function __construct()
    {

}

public static function singleton()
    {

if ( ! isset(self::$_instance) ) {
            $c = __CLASS__ ;
            self::$_instance = new $c ;
            self::$_instance->init() ;
        }

return self::$_instance ;
    }

public function getToken()
    {
        return $this->token ;
    }

public function hasChanged()
    {
        return $this->changed ;
    }

public function setChanged($changed=true)
    {
        $this->changed = $changed;
    }

public function init()
    {
        session_name(self::UTYPE . 'WEBUI') ; // to prevent conflicts with other app sessions
        session_start() ;

if ( ! array_key_exists('secret', $_SESSION) ) {
            $_SESSION['secret'] = 'litespeedrocks' ;
        }

if ( ! array_key_exists('changed', $_SESSION) ) {
            $_SESSION['changed'] = false ;
        }

if ( ! array_key_exists('valid', $_SESSION) ) {
            $_SESSION['valid'] = false ;
        }

if ( ! array_key_exists('timeout', $_SESSION) ) {
            $_SESSION['timeout'] = 0 ;
        }

if ( ! array_key_exists('token', $_SESSION) ) {
            $_SESSION['token'] = microtime() ;
        }

$this->valid = &$_SESSION['valid'] ;
        $this->changed = &$_SESSION['changed'] ;
        $this->secret = &$_SESSION['secret'] ;
        $this->timeout = &$_SESSION['timeout'] ;
        $this->token = $_SESSION['token'] ;

if ( $this->valid == true ) {

if ( array_key_exists('lastaccess', $_SESSION) ) {

if ( $this->timeout > 0 && time() - $_SESSION['lastaccess'] > $this->timeout ) {
                    $this->clear() ;
                    header("location:/login.php?timedout=1") ;
                    die() ;
                }

$this->id = DUtil::grab_input('cookie', $this->id_field) ;
                $this->pass = DUtil::grab_input('cookie', $this->pass_field) ;
            }
            $this->updateAccessTime() ;
        }
    }

public function isValid()
    {
		if ($this->valid !== true) {
			return false;
		}
		// otherwise enforce referrer exists
		if (!isset($_SERVER['HTTP_REFERER'])) {
			return false;
		}
		if (strpos($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST']) === false) {
			return false;
		}
		return true;
    }

public function store( $uid, $pass )
    {
		$domain = $_SERVER['HTTP_HOST'];
		if ($pos = strpos($domain, ':')) {
			$domain = substr($domain, 0, $pos);
		}
		$secure = !empty($_SERVER['HTTPS']);
		$httponly = true;
        setcookie($this->id_field, $uid, 0, '/', $domain, $secure, $httponly) ;
        setcookie($this->pass_field, $pass, 0, '/', $domain, $secure, $httponly) ;
        $this->updateAccessTime() ;
        $this->valid = true ;
    }

public function getIdData()
    {
        return array('id' => $this->id, 'pass' => $this->pass,
            'sec0' => $this->secret[0], 'sec1' => $this->secret[1]);
    }

public function setSecret( $secret )
    {
        $this->secret = $secret ;
    }

public function getTimeout()
    {
        return $this->timeout ;
    }

public function setTimeout( $timeout )
    {
        $this->timeout = (int) $timeout ;
    }

public function updateAccessTime()
    {
        $_SESSION['lastaccess'] = time() ;
    }

public function clear()
    {
        $this->valid = false ;
        session_destroy() ;
        session_unset() ;
        $outdated = time() - 3600 * 24 * 30 ;
        setcookie($this->id_field, '', $outdated, "/") ;
        setcookie($this->pass_field, '', $outdated, "/") ;
        setcookie(session_name(), '', $outdated, "/") ;
    }

private function authuser( $authUser, $authPass )
    {
        $auth = false ;
        $authUser1 = escapeshellcmd($authUser);
        if (($authUser === $authUser1)
                && !preg_match('/[:\/]/', $authUser)
                && strlen($authUser) && strlen($authPass) ) {
            $filename = DUtil::grab_input("server", "LS_SERVER_ROOT") . 'admin/conf/htpasswd' ;

$fd = fopen($filename, 'r') ;
            if ( ! $fd ) {
                return false ;
            }

$all = trim(fread($fd, filesize($filename))) ;
            fclose($fd) ;

$lines = explode("\n", $all) ;
            foreach ( $lines as $line ) {
                list($user, $hash) = explode(':', $line) ;
                if ( $user == $authUser ) {
                    $encypt = crypt($authPass, $hash) ;
                    if ( $hash == $encypt ) {
                        $auth = true ;
                        break ;
                    }
                }
            }
        }
        return $auth ;
    }

public function authenticate( $authUser, $authPass )
    {
        $auth = $this->authuser($authUser, $authPass);
        if ( ! $auth ) {
            $this->emailNotify(escapeshellcmd($authUser));
        }
        return $auth ;
    }

public function reauthenticate()
    {
   		$uid = PMA_blowfish_decrypt( $this->id, $this->secret[0]);
		$password = PMA_blowfish_decrypt( $this->pass, $this->secret[1]);
        if (!$this->authuser($uid, $password)) {
            $this->clear() ;
            header("location:/login.php?timedout=2") ;
            die() ;
        }
    }

protected function emailNotify($userid)
    {
        // log in error log
        $ip = $_SERVER["REMOTE_ADDR"];
        $uri = $_SERVER['SCRIPT_URI'];
        error_log("[WebAdmin Console] Failed Login Attempt - username: $userid ip: $ip url: $uri\n");

// email notice
        $confcenter = ConfCenter::singleton();
        $emails = $confcenter->GetAdminEmails();
        if ($emails != '') {
            $date = date("F j, Y, g:i a");
            $subject = 'LiteSpeed Web Server Admin Console Failed Login Attempt';
            $contents = "A recent login attempt to LiteSpeed Web Server WebAdmin console failed. Details of the attempt are below.\n
	Date/Time: $date
	Username: $userid
	IP Address: $ip
	URL: $uri

If you do not recognize the IP address, please follow below recommended ways to secure your admin console:

1. set access allowed list to limit certain IP that can access under WebConsole->Admin->Security tab;
	2. change the listener port from default value 7080;
	3. do not use simple password;
	4. use a real SSL certificate for admin console to replace the default self-signed one.
	";
            $result = mail($emails, $subject, $contents);
        }
    }

//persistent stats
    public function &getStat( $key )
    {

$key = "stat_$key" ;

if ( isset($_SESSION[$key]) ) {
            return $_SESSION[$key] ;
        }
        else {
            $temp = null ;
            return $temp ;
        }
    }

public function addStat( $key, &$data )
    {

$result = &$this->getStat($key) ;
        $sess_key = "stat_$key" ;
        $sess_keylock = "{$key}_lock_" ;

if ( $result != null ) {
            $curtime = time() ;
            $time_span = $curtime - $_SESSION[$sess_keylock] ;
            if ( isset($_SESSION[$sess_keylock]) ) {
                if ( $time_span <= 1 ) {
                    //multiple stats windows open...check locks
                    echo("multiple stats windows open\n") ;
                    return false ;
                }
                elseif ( $time_span > 70 ) {
                    //data is stale
                    $_SESSION[$sess_key] = null ;
                    echo ("data is stale\n") ;
                    return false ;
                }
            }

//incoming data's column set does not match that of store data
            if ( count($data) != count($result) ) {
                echo("incoming data's column set does not match that of the stored data.\n") ;
                return false ;
            }

//max item 30 reached...shorten array by 1 from head
            if ( count($result[0]) >= $this->stat_limit ) {
                foreach ( $result as $index => $set ) {
                    while ( count($result[$index]) >= $this->stat_limit ) {
                        array_shift($result[$index]) ;
                    }
                }
            }

//add data
            foreach ( $result as $index => $set ) {
                $result[$index][] = $data[$index] ;
            }

$_SESSION[$sess_keylock] = $curtime ;
            return true ;
        }
        else {
            $result = [] ;

//init data
            foreach ( $data as $index => $value ) {
                $result[$index] = [] ;
                $result[$index][] = $value ;
            }

$_SESSION[$sess_key] = &$result ;
            $_SESSION[$sess_keylock] = $curtime ;
            return true ;
        }
    }

}

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