How to decipher session sid from Hapi.JS

//Hapi JS use his own cypher algorithm
//see here : https://github.com/hueniverse/iron

handler:funcition(request, reply){
  var ssid = req.headers['cookie'].split('session=')[1];
  var sidPassword = request.connection.states.cookies.session.password
   Iron.unseal(ssid,,Iron.defaults, function (err, unsealed) {
        console.log(unsealed);
  });  
}