Asymmetric encryption of JSON in node.js

asymmetric_encryption.js

const NodeRSA = require('node-rsa');

// generate new public/private key-pair
const key = new NodeRSA({ b: 2048 });
const publicKey = key.exportKey('pkcs8-public-pem');
const privateKey = key.exportKey('pkcs8-private-pem');

// print the keys
console.log('\nPUBLIC KEY:\n');
console.log(publicKey);
console.log('\nPRIVATE KEY:\n');
console.log(privateKey);
console.log('\n');

// data to be encrypted
const data = { hello: 'world' };
const text = JSON.stringify(data);

// server code - encryption using public key
const serverKey = new NodeRSA(publicKey);
const encrypted = serverKey.encrypt(text, 'base64');
console.log('encrypted: ', encrypted, '\n');

// client code - decryption using private key
const clientKey = new NodeRSA(privateKey);
const decrypted = clientKey.decrypt(encrypted, 'utf8');
console.log('decrypted: ', JSON.parse(decrypted));