node-express-mongodb-jwt-rest-api-skeleton/app/middleware/auth/encrypt.js

Node.js express.js MongoDB JWT REST API - This is a basic API REST skeleton written on JavaScript using async/await. Great for building a starter web API for your front-end (Android, iOS, Vue, react, angular, or anything that can consume an API)

const crypto = require('crypto')

const secret = process.env.JWT_SECRET
const algorithm = 'aes-256-cbc'
// Key length is dependent on the algorithm. In this case for aes256, it is
// 32 bytes (256 bits).
const key = crypto.scryptSync(secret, 'salt', 32)
const iv = Buffer.alloc(16, 0) // Initialization crypto vector

/**
 * Encrypts text
 * @param {string} text - text to encrypt
 */
const encrypt = (text = '') => {
  const cipher = crypto.createCipheriv(algorithm, key, iv)

  let encrypted = cipher.update(text, 'utf8', 'hex')
  encrypted += cipher.final('hex')

  return encrypted
}

module.exports = { encrypt }