Generate Private and Public key using Node

keypair.js

// $ npm install node-rsa
const NodeRSA = require('node-rsa');

const keyPair = new NodeRSA({b: 512}).generateKeyPair();
const publicKey = keyPair.exportKey('public')
const privateKey = keyPair.exportKey('private')

console.log(publicKey);
console.log("\n\n");
console.log(privateKey);