Nodejs: aes-256-cbc examples (with iv, blockSize)

index.js

import crypto from "crypto";

const algorithm = "aes-256-cbc";

const Aes256 = (text, key, iv) => {
  let cipher = crypto.createCipheriv(algorithm, new Buffer.from(key), new Buffer.from(iv));
  cipher.setAutoPadding(false);
  let encrypted = cipher.update(PKCS5Padding(text));
  encrypted = Buffer.concat([encrypted]);
  return encrypted.toString("hex");
};

function PKCS5Padding(string, blocksize = 16) {
  const len = string.length;
  const pad = blocksize - (len % blocksize);
  const res = string + String.fromCharCode(pad).repeat(pad);
  return res;
}

const plaintext = "abcdefghijklmnopqrstuvwxyzABCDEF"
const key = "12345678901234567890123456789012";
const iv = "1234567890123456"
const hashedText = Aes256(plaintext, key, iv)
console.log("Result: ", hashedText)