Encrypting Data in Node.js
Last Updated :
11 Apr, 2023
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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.
// 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();
}
let gfg = encrypt("GeeksForGeeks");
console.log(gfg);
console.log(decrypt(gfg));
Output:
