Create a new node.js project Create new directory anywhere in your system and create new project using the following command:
npm init -y
If you have installed Node.js by manual build then there is a chance that crypto library is not shipped with it. You can run this command to install crypto dependency.
npm install crypto --save
You don’t need to do that if you have installed it using pre-built packages.
Let’s move ahead.
Encrypt and decrypt data (Strings, numbers etc)
// Nodejs encryption with CTR
const crypto = require('crypto');
const algorithm = 'aes-256-cbc';
const key = crypto.randomBytes(32);
const iv = crypto.randomBytes(16);
function encrypt(text) {
let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(key), iv);
let encrypted = cipher.update(text);
encrypted = Buffer.concat([encrypted, cipher.final()]);
return { iv: iv.toString('hex'), encryptedData: encrypted.toString('hex') };
}
function decrypt(text) {
let iv = Buffer.from(text.iv, 'hex');
let encryptedText = Buffer.from(text.encryptedData, 'hex');
let decipher = crypto.createDecipheriv('aes-256-cbc', Buffer.from(key), iv);
let decrypted = decipher.update(encryptedText);
decrypted = Buffer.concat([decrypted, decipher.final()]);
return decrypted.toString();
}
var hw = encrypt("Some serious stuff")
console.log(hw)
console.log(decrypt(hw))