REST AUTH

var genSignedParamString = function(userID, secret, cmd, params) {
		params.userid = userID;
		params.command = cmd;		
		
		var paramKeys = [];
		for(var key in params) {
			if(params.hasOwnProperty(key)){
				paramKeys.push(key);
			};
		};
                
                paramKeys.sort(); //you get a cookie if you can tell me why we sort the parameters

                var qsParameters = [];
		for(var i = 0; i < paramKeys.length; i++) {
			key = paramKeys[i];
			qsParameters.push(key + '=' + encodeURIComponent(params[key]));
		}

		var queryString = qsParameters.join('&')
		  , cryptoAlg = crypto.createHmac('sha1', secret)
		  , signature = cryptoAlg.update(queryString.toLowerCase()).digest('base64');

		return queryString + '&signature=' + encodeURIComponent(signature);
	};