a simple encryption and decryption code in JS

crypto.js

// A node demo program for creating the ECDH

// Importing the crypto module
const crypto = require('crypto');
// import crypto from 'crypto'
// Initializing the algorithm
const algorithm = 'aes-256-cbc';

// Initializing the key
const key = Buffer.from("48b1db4df28757ba48b1db4df28757ba");

// Initializing the iv vector
// const iv = Buffer.from("1111111122222222");
// const iv = crypto.randomBytes(16);


// Encrypt function to encrypt the data
function encrypt(text) {
    iv = crypto.randomBytes(16);
    // crypto.subtle.decrypt()
// Creating the cipher with the above defined parameters
    let cipher =
        crypto.createCipheriv(algorithm, Buffer.from(key));

// Updating the encrypted text...
    let encrypted = cipher.update(text);

// Using concatenation
    encrypted = Buffer.concat([encrypted, cipher.final()]);

// Returning the iv vector along with the encrypted data
    return { iv: iv.toString('hex'),
        encryptedData: encrypted.toString('hex') };
}

//Decrypt function for decrypting the data
function decrypt(output) {

// Creating the decipher from algo, key and iv
    let decipher = crypto.createDecipheriv(
        algorithm, Buffer.from(key), Buffer.from(output.iv, 'hex'));

// Updating decrypted text
    let decrypted = decipher.update(Buffer.from(output.encryptedData, 'hex'));
    decrypted = Buffer.concat([decrypted, decipher.final()]);

// returning response data after decryption
    return decrypted.toString();
}
console.time("encryption time :")
for (let i = 0; i < 1; i++) {
    // Encrypting the below data and printing output
    var output = encrypt("Welcome to TutorialsPoint !" + i);
    // console.log("Encrypted data -- ", output);
    // console.log("Decrypted data -- ", decrypt(output));
}
console.timeEnd("encryption time :")

//Printing decrypted data