Node.js: crypto.pbkdf2 password to hex

I currently use following set up to register new users: ``` // creates a new user app.post('/users', function(req, res) { // create new user var user = new User(); // assign post user.username = req.body.username; user.email = req.body.email; crypto.randomBytes(32, function(err, buf) { if (err) throw err; user.salt = buf.toString('hex'); crypto.pbkdf2(req.body.password, user.salt, 25000, 512, function(err, encodedPassword) { if (err) throw err; user.password = (encodedPassword.toString('hex')); // this line user.save(function(err, user) { if (!err) return res.send(err, 500); return res.json(user); }); }.bind(this)); }); }); ``` Take a closer look at this line: ``` user.password = (encodedPassword.toString('hex')); ``` This should encode the password string (which looks like a binary one) into a hex string. For some reason this doesn't work. Why not? Byside: What encoding is recommand for salt and password storage (hex, binary, base64)?