encrypt.js

const crypto = require("crypto");
const algorithm = "aes-256-cbc";
const secretKey = "SECRET_KEY_32_CHARS";

module.exports = {
  encrypt,
  decrypt,
};

// https://attacomsian.com/blog/nodejs-encrypt-decrypt-data
function encrypt(text) {
  // regenerate vector each time
  const iv = crypto.randomBytes(16);
  const cipher = crypto.createCipheriv(algorithm, secretKey, iv);
  const encrypted = Buffer.concat([cipher.update(text), cipher.final()]);
  return {
    iv: iv.toString("hex"),
    content: encrypted.toString("hex"),
  };
}

function decrypt(hash) {
  const decipher = crypto.createDecipheriv(
    algorithm,
    secretKey,
    Buffer.from(hash.iv, "hex")
  );
  const decrpyted = Buffer.concat([
    decipher.update(Buffer.from(hash.content, "hex")),
    decipher.final(),
  ]);
  return decrpyted.toString();
}