AES-256-CBC implementation in nodeJS with built-in Crypto library

aes-256-cbc.js

'use strict';

const crypto = require('crypto');
const ENC_KEY = "bf3c199c2470cb477d907b1e0917c17b"; // set random encryption key
const IV = "5183666c72eec9e4"; // set random initialisation vector
// ENC_KEY and IV can be generated as crypto.randomBytes(32).toString('hex');

const phrase = "who let the dogs out";

var encrypt = ((val) => {
  let cipher = crypto.createCipheriv('aes-256-cbc', ENC_KEY, IV);
  let encrypted = cipher.update(val, 'utf8', 'base64');
  encrypted += cipher.final('base64');
  return encrypted;
});

var decrypt = ((encrypted) => {
  let decipher = crypto.createDecipheriv('aes-256-cbc', ENC_KEY, IV);
  let decrypted = decipher.update(encrypted, 'base64', 'utf8');
  return (decrypted + decipher.final('utf8'));
});



encrypted_key = encrypt(phrase);
original_phrase = decrypt(encrypted_key);

// star this gist if you found it useful

Much obliged, it helped for my current case.

FYI, if someone still has problem creating random keys, this is how you can do it:

const ENC_KEY = "bf3c199c2470cb477d907b1e0917c17b"; // # Generate: crypto.randomBytes(32).toString("hex").slice(0, 32);
const IV = "5183666c72eec9e4"; //Generate: crypto.randomBytes(16).toString("hex").slice(0, 16);

Danny Bullo