Node.js v10 - crypto.createDecipheriv()

encrypto.js

// This is example of using crypto.createCipheriv(), because
// crypto.createCipher() is deprecated since Node.js v10

const crypto = require('crypto')

const encrypto = {

  encrypt(text, password) {
    const key = password.repeat(32).substr(0, 32)
    const iv = password.repeat(16).substr(0, 16)
    const cipher = crypto.createCipheriv('aes-256-ctr', key, iv)
    let encrypted = cipher.update(text, 'utf8', 'hex')
    encrypted += cipher.final('hex')
    return encrypted
  },

  decrypt(text, password) {
    const key = password.repeat(32).substr(0, 32)
    const iv = password.repeat(16).substr(0, 16)
    const decipher = crypto.createDecipheriv('aes-256-ctr', key, iv)
    let decrypted = decipher.update(text, 'hex', 'utf8')
    decrypted += decipher.final('utf8')
    return decrypted
  }

}

const message = 'Hello World!'

const key = 'p4$5w0rD'

const encryptedMessage = encrypto.encrypt(message, key)

console.log(encryptedMessage) //  17a26aa419b4b88609750b9f

console.log(encrypto.decrypt(encryptedMessage, key)) // Hello World!