node.js aes example

router.js

const PromiseRouter = require('express-router-wrapper')
const router = new PromiseRouter()
const crypto = require('crypto')

const iv = process.env.VPN_AES_IV
const secret = process.env.VPN_AES_SECRET

router
  .get('/', async (req, res) => {
    const text = {key: "value"}

    const cipher = crypto.createCipheriv(
      'aes-256-cbc', 
      Buffer.from(secret), 
      Buffer.from(iv))

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

    return {
      data: encrypted.toString('hex')
    }
  })

module.exports = router.getOriginal()