Node.js encryption of passwords

I use the follwing code to salt and hash passwords.

var bcrypt = require('bcrypt');

exports.cryptPassword = function(password, callback) {
   bcrypt.genSalt(10, function(err, salt) {
    if (err) 
      return callback(err);

    bcrypt.hash(password, salt, function(err, hash) {
      return callback(err, hash);
    });

  });
};

exports.comparePassword = function(password, userPassword, callback) {
   bcrypt.compare(password, userPassword, function(err, isPasswordMatch) {
      if (err) 
        return callback(err);
      return callback(null, isPasswordMatch);
   });
};

bcrypt also can be called synchronously. Sample Coffeescript:

bcrypt = require('bcrypt')

encryptionUtil = 
    encryptPassword: (password, salt) ->
        salt ?= bcrypt.genSaltSync()
        encryptedPassword = bcrypt.hashSync(password, salt)
        {salt, encryptedPassword}

    comparePassword: (password, salt, encryptedPasswordToCompareTo) ->
        {encryptedPassword} = @encryptPassword(password, salt)
        encryptedPassword == encryptedPasswordToCompareTo

module.exports = encryptionUtil

Also there is bcrypt-nodejs module for node. https://github.com/shaneGirish/bcrypt-nodejs.

Previously I used already mentioned here bcrypt module, but fall into problems on win7 x64. On the other hand bcrypt-nodejs is pure JS implementation of bcrypt and does not have any dependencies at all.