Hashing password with Crypto

passwordHash.js

// Ref: https://ciphertrick.com/salt-hash-passwords-using-nodejs-crypto/

'use strict';
var crypto = require('crypto');

/**
 * generates random string of characters i.e salt
 * @function
 * @param {number} length - Length of the random string.
 */
var genRandomString = function(length){
  return crypto.randomBytes(Math.ceil(length/2))
    .toString('hex') /** convert to hexadecimal format */
    .slice(0,length);   /** return required number of characters */
};

/**
 * hash password with sha512.
 * @function
 * @param {string} password - List of required fields.
 * @param {string} salt - Data to be validated.
 */
var sha512 = function(password, salt){
  var hash = crypto.createHmac('sha512', salt); /** Hashing algorithm sha512 */
  hash.update(password);
  var value = hash.digest('hex');
  return {
    salt:salt,
    passwordHash:value
  };
};

function saltHashPassword(userpassword) {
  var salt = genRandomString(16); /** Gives us salt of length 16 */
  var passwordData = sha512(userpassword, salt);
  console.log('UserPassword = '+userpassword);
  console.log('Passwordhash = '+passwordData.passwordHash);
  console.log('nSalt = '+passwordData.salt);
}

saltHashPassword('MYPASSWORD');
saltHashPassword('MYPASSWORD');