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

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