NodeJs get Larvel sessionId from session cookie

gistfile1.js

// tested with Laravel 4.2.*

var PHPUnserialize = require('php-unserialize'); // npm install php-unserialize
var MCrypt = require('mcrypt').MCrypt; // npm install mcrypt
var encryptionKey = '---Laravel encription string---'

function ord( string ) {    // Return ASCII value of character
    return string.charCodeAt(0);
}

function getSessionIdFromLaravelCookie(encodedCookie, encryptionKey) {

    var cookie = JSON.parse(new Buffer(encodedCookie, 'base64'));
    var iv = new Buffer(cookie.iv, 'base64');
    var value = new Buffer(cookie.value, 'base64');

    var rijCbc = new MCrypt('rijndael-128', 'cbc');
    rijCbc.open(encryptionKey, iv);

    var decrypted = rijCbc.decrypt(value).toString();
    var len = decrypted.length - 1;
    var pad = ord(decrypted.charAt(len));

    var sessionId = PHPUnserialize.unserialize(decrypted.substr(0, decrypted.length - pad));

    return sessionId;
}