ridibooks / simple-notifier

const JWT = require('jsonwebtoken');

const config = require('./../config/server.config.js');

const crypto = require('crypto');

/**

 * Generate auth token

 * @param {Object} account

 *    - {string} username - username for login

 *    - {string} role - user's role

 *    - {number} exp - timestamp indicates expiration date

 *    - {string} ip - client ip address

 * @param {number} ttl - time to live in millisecond

 * @returns {*}

 */

exports.generateToken = (account, ttl) => JWT.sign({

  username: account.username,

  role: account.role,

  exp: new Date().getTime() + (ttl || config.auth.tokenTTL),

  ip: account.ip,

}, process.env.SECRET_KEY || config.auth.secretKey);

/**

 * Encrypt user password

 * @param {Object} credential - user inputs

 *    - {string} username

 *    - {string} password

 * @returns {string}

 */

exports.encryptPassword = (credential) => {

  const hmac = crypto.createHmac('sha256', process.env.SECRET_KEY || config.auth.secretKey);

  hmac.update(`${credential.username}:${credential.password}`);

  return hmac.digest('hex');

};

/**

 * Compare password from database with password user input

 * The password on database is always generated from '[username]:[password]' string. That improves password's security.

 * @param {Object} credential - user inputs

 *    - {string} username

 *    - {string} password

 * @param {string} dbPassword - digested password string from database

 * @returns {boolean}

 */

exports.comparePassword = (credential, dbPassword) => exports.encryptPassword(credential) === dbPassword;