Encrypt-decrypt AES256 Node.js with crypto module example

enc.js

var crypto = require("crypto");

function encrypt(key, data) {
    var ciph = crypto.createCipher("aes256", key);
    ciph.end(data);

    var encBuffer = ciph.read();
    // Convert to base64
    return encBuffer.toString("base64");
}

function decrypt(key, data) {
   var ciph = crypto.createDecipher("aes256", key);
   var encBuffer = new Buffer(data, "base64");
   ciph.end(encBuffer);

   return ciph.read().toString("utf8");
}

var enc = encrypt("kass", "hernesupp");
var dec = decrypt("kass", enc);
console.log(enc, dec);