OmnomIRC-node/shims/mybb/shim.php

<?PHP
error_reporting(E_ALL);
ini_set('display_errors', '1');
$encriptKeyToUse = "key from Config.php (created while installation)";
function base64_url_encode($input){
	return strtr(base64_encode($input), '+/=', '-_,');
}
function base64_url_decode($input){
	return base64_decode(strtr($input, '-_,', '+/=')); 
}
define("IN_MYBB", 1);
define("NO_ONLINE", 1);
require_once "./global.php";
ob_start();
if(!isset($_GET['op'])){
	if(isset($_GET['txt'])){
		header('Content-type: text/plain');
	}elseif(!isset($_GET['textmode'])){
		header('Content-type: text/javascript');
	}
	if($mybb->user['username']=="" || $mybb->user['isbannedgroup']){
		$nick = "Guest";
		$signature = "";
	}else{
		$nick = $mybb->user['username'];
		$signature = base64_url_encode(mcrypt_encrypt ( MCRYPT_RIJNDAEL_256 , $encriptKeyToUse , $nick , MCRYPT_MODE_ECB));
	}
}
ob_end_clean();
if(isset($_GET['op'])){
	header('Content-type: text/plain');
	$id = $_GET['u'];
	$user = get_user((int) $id);
	if (base64_url_decode($_GET['nick'])==$user['username']){
		echo $user['usergroup'];
	}
}else{
	if(isset($_GET['txt'])){
		echo $signature."\n".$nick."\n".$mybb->user['uid'];
	}elseif(isset($_GET['textmode'])){
		header('Location: http://chat.forum.acr.victorz.ca/textmode.php?login&nick='.urlencode($nick).'&sig='.urlencode($signature).'&id='.$mybb->user['uid']);
	}else{
		echo "signCallback('$signature','$nick','".$mybb->user['uid']."');";
	}
}
?>