encrypt_decrpyt.js

const crypto = require('crypto');
const alogrithm = 'aes-256-cbc';
const ENCRYPTION_KEY = '770A8A65DA156D24EE2A093277530142';
const IV_LENGTH = 16; // For AES, this is always 16

function encrypt(text) {
    let iv = crypto.randomBytes(IV_LENGTH);
    let cipher = crypto.createCipheriv(alogrithm, new Buffer(ENCRYPTION_KEY), iv);
    let encrypted = cipher.update(text);

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

    return iv.toString('hex') + ':' + encrypted.toString('hex');
}

function decrypt(text) {
    let textParts = text.split(':');
    let iv = new Buffer(textParts.shift(), 'hex');
    let encryptedText = new Buffer(textParts.join(':'), 'hex');
    let decipher = crypto.createDecipheriv(alogrithm, new Buffer(ENCRYPTION_KEY), iv);
    let decrypted = decipher.update(encryptedText);

    decrypted = Buffer.concat([decrypted, decipher.final()]);

    return decrypted.toString();
}