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proxyCheck.php
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178 lines (148 loc) · 4.14 KB
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<?php
/**
* @version 1.0
* @package SNB proxy
* @copyright © 2008 security-net.biz
* @author Ivan Markovic <ivanm@security-net.biz>
*/
/**
* Proxy check functions.
* Collection of some functions that can help proxy detection
* Contains common methods needed as:
* headers check, open ports check, cookie trap.
*
* Sample usage:
* $myProxy = new proxyCheck();
* $myProxy->serverVar = $_SERVER;
* $headers = $myProxy->checkHeder();
* $ports = $myProxy->checkPort();
*/
class proxyCheck {
/**
* Server vars ($_SERVER)
* @access public
* @var array
*/
var $serverVar = array();
/**
* Timeout for fsockopen
* @access public
* @var int
*/
var $timeout = 5;
/**
* Common ports for testing
* @access public
* @var array
*/
var $ports = array(3128,8080,80);
/**
* Cookie name
* @access public
* @var string
*/
var $cookieName = "proxyCheck";
/**
* Finded headers
* @access private
* @var array
*/
private $proxyHeder = array();
/**
* Finded open ports
* @access private
* @var array
*/
private $portsData = array();
/**
* URL of proxy URL check
* @access public
* @var string
*/
var $proxyUrl = '';
/**
* proxyCheck constructor
* @access public
*/
function proxyCheck() {
// TODO
}
/**
* Check usual proxy headers
* @return array data
* @access public
*/
function checkHeder() {
if(isset($this->serverVar['HTTP_X_FORWARDED_FOR'])) {
$this->proxyHeder['HTTP_X_FORWARDED_FOR'] = $this->serverVar['HTTP_X_FORWARDED_FOR'];
}
if(isset($this->serverVar['HTTP_X_FORWARDED'])) {
$this->proxyHeder['HTTP_X_FORWARDED'] = $this->serverVar['HTTP_X_FORWARDED'];
}
if(isset($this->serverVar['HTTP_FORWARDED'])) {
$this->proxyHeder['HTTP_FORWARDED'] = $this->serverVar['HTTP_FORWARDED'];
}
if(isset($this->serverVar['HTTP_PROXY_AGENT'])) {
$this->proxyHeder['HTTP_PROXY_AGENT'] = $this->serverVar['HTTP_PROXY_AGENT'];
}
if(isset($this->serverVar['HTTP_VIA'])) {
$this->proxyHeder['HTTP_VIA'] = $this->serverVar['HTTP_VIA'];
}
if(isset($this->serverVar['HTTP_PROXY_CONNECTION'])) {
$this->proxyHeder['HTTP_PROXY_CONNECTION'] = $this->serverVar['HTTP_PROXY_CONNECTION'];
}
if(isset($this->serverVar['HTTP_CLIENT_IP'])) {
$this->proxyHeder['HTTP_CLIENT_IP'] = $this->serverVar['HTTP_CLIENT_IP'];
}
return $this->proxyHeder;
}
/**
* Check common ports
* @param string ip
* @return array data
* @access public
*/
function checkPort($ip = '') {
if(empty($ip)) $ip = $this->serverVar['REMOTE_ADDR'];
foreach($this->ports as $port) {
$fp = @fsockopen($ip,$port,$errno,$errstr,$this->timeout);
if(!empty($fp)) $this->portsData[$port] == $port;
@fclose($fp);
}
return $this->portsData;
}
/**
* Cookie trap
* @return true on finded proxy
* @access public
*/
function checkCookie() {
if(isset($_COOKIE[$this->cookieName])) {
if($this->serverVar['REMOTE_ADDR'] != $_COOKIE[$this->cookieName]) return true;
} else {
@setcookie($this->cookieName, $this->serverVar['REMOTE_ADDR']);
}
}
/**
* Connect back using CURL
* @return data from proxyUrl
* @access public
*/
function connectBack() {
if(!empty($this->proxyUrl)) {
$buffer = array();
foreach($this->ports as $key => $val) {
$curl_handle = curl_init();
curl_setopt($curl_handle, CURLOPT_URL, $this->proxyUrl);
curl_setopt($curl_handle, CURLOPT_PROXY, $this->serverVar['REMOTE_ADDR'].":".$val);
curl_setopt($curl_handle, CURLOPT_USERAGENT, $this->serverVar['HTTP_USER_AGENT']);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_HEADER, 0);
$buffer[$val] = curl_exec($curl_handle);
curl_close($curl_handle);
return $buffer;
}
} else return 'Empty proxyUrl.';
}
}
?>