sourceserver.info

Source code

<?php

function genUrl($returnUrl)
{
	$returnUrl = (!$returnUrl) ? (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'] : $returnUrl;
	
	$params = array(
 'openid.ns' => 'http://specs.openid.net/auth/2.0',
 'openid.mode' => 'checkid_setup',
 'openid.return_to'	=> $returnUrl,
 'openid.realm' => (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'],
 'openid.identity'	=> 'http://specs.openid.net/auth/2.0/identifier_select',
 'openid.claimed_id'	=> 'http://specs.openid.net/auth/2.0/identifier_select',
	);
	
	$sep = '&amp;';
	return 'https://steamcommunity.com/openid/login?' . http_build_query($params, '', $sep);
}

function validate()
{
	session_start();
	
	if (isset($_SESSION['HTTP_USER_AGENT']))
	{
 if ($_SESSION['HTTP_USER_AGENT'] != md5($_SERVER['HTTP_USER_AGENT']))
 {
 logout();
 return false;
 }
	}
	
	if (!isset($_SESSION['stamm_steamid64']))
	{
 if(isset($_COOKIE['stamm_steamid64']))
 {
 session_regenerate_id();
 $_SESSION['stamm_steamid64'] = $_COOKIE['stamm_steamid64'];
 $_SESSION['HTTP_USER_AGENT'] = md5($_SERVER['HTTP_USER_AGENT']);
 
 return true;
 }
	
	}
	else return true;
	
	if (!isset($_GET['openid_signed'])) return false;
	
	$params = array(
 'openid.assoc_handle'	=> $_GET['openid_assoc_handle'],
 'openid.signed' => $_GET['openid_signed'],
 'openid.sig' => $_GET['openid_sig'],
 'openid.ns' => 'http://specs.openid.net/auth/2.0',
	);
	

	$signed = explode(',', $_GET['openid_signed']);
	
	foreach($signed as $item)
	{
 $val = $_GET['openid_' . str_replace('.', '_', $item)];
 $params['openid.' . $item] = get_magic_quotes_gpc() ? stripslashes($val) : $val; 
	}

	$params['openid.mode'] = 'check_authentication';
	
	$data = http_build_query($params);
	
	$context = stream_context_create(array(
 'http' => array(
 'method' => 'POST',
 'header' => 
 "Accept-language: en\r\n".
 "Content-type: application/x-www-form-urlencoded\r\n" .
 "Content-Length: " . strlen($data) . "\r\n",
 'content' => $data,
 ),
	));

	$result = file_get_contents('https://steamcommunity.com/openid/login', false, $context);
	
	preg_match("#^http://steamcommunity.com/openid/id/([0-9]{17,25})#", $_GET['openid_claimed_id'], $matches);
	$steamID64 = is_numeric($matches[1]) ? $matches[1] : 0;

	$steamid64_finish = preg_match("#is_valid\s*:\s*true#i", $result) == 1 ? $steamID64 : '';
	
	if(!empty($steamid64_finish))
	{
 session_regenerate_id (true);
 
 $_SESSION['HTTP_USER_AGENT'] = md5($_SERVER['HTTP_USER_AGENT']);
 $_SESSION['stamm_steamid64'] = $steamid64_finish;
 
 setcookie("stamm_steamid64", $_SESSION['stamm_steamid64'], time()+60*60*24*10, "/");
 
 return true;
	}
	
	return false;
}

function calculate_steamid()
{
	$commid = $_SESSION['stamm_steamid64'];
	
	if (substr($commid, -1)%2 == 0) $server = 0; 
	else $server = 1;
 
	$auth = bcsub($commid, '76561197960265728');
	
	if (bccomp($auth, '0') != 1) return "";
	
	$auth = bcsub($auth, $server);
	$auth = bcdiv($auth, 2);
	
	return 'STEAM_0:'.$server.':'.$auth;
}

function curPageURL()
{
	$pageURL = 'http';
	
	if ($_SERVER["HTTPS"] == "on") $pageURL .= "s";
	
	$pageURL .= "://";
	
	if ($_SERVER["SERVER_PORT"] != "80") $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
	else $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
	
	return $pageURL;
}

if (validate())
{
	$steamid = calculate_steamid();
	echo "thanks for logging in, your Steamid is $steamid";
}
else
{
	$url = genUrl(curPageURL());
	
	echo '<a href="'.$url.'"><img src="http://cdn.steamcommunity.com/public/images/signinthroughsteam/sits_small.png" /></a>';
}
?>