Skip to content
Related Articles

Related Articles

Encrypting Data in Node.js

Improve Article
Save Article
  • Last Updated : 14 Oct, 2021
Improve Article
Save Article

Encryption and Decryption in Node can be done by installing and implementing the ‘crypto’ library. If you have installed Node.js by manual build, then there is a chance that the crypto library is not shipped with it. You can run 
the following command to install the crypto dependency.
 

npm install crypto --save

But you don’t need to do that if you have installed it using pre-built packages.
Example for implementing crypto in Node. 
 

javascript




// 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 gfg = encrypt("GeeksForGeeks");
console.log(gfg);
console.log(decrypt(gfg));

Output 
 

 

My Personal Notes arrow_drop_up
Related Articles

Start Your Coding Journey Now!