RSA encryption / decryption example (nodejs)

simple_rsa

openssl key pair generate
//client  - using meteor.js 
const nodersa = Npm.require('node-rsa'); 
import { HTTP } from 'meteor/http';
const syncPost = Meteor.wrapAsync( HTTP.post, HTTP );

encryptStringWithRsaPublicKey( data ) {

    const absolutePath = Assets.absoluteFilePath( "public.key" ); //public key file path
    const publicKey = fs.readFileSync( absolutePath, "utf8" );
    const key = new nodersa( publicKey );
    const encrypted = key.encrypt( data, 'base64' );
    const remote = 'url:8000'; //example 
    return syncPost( remote, { data : { 'value' : encrypted } } );

}
...


//example server

'use strict';
const express = require('express');
const fs = require('fs');
const nodersa = require('node-rsa');
const bodyParser = require('body-parser');

let app = express();
app.use(bodyParser.urlencoded({ extended : false }));
app.use(bodyParser.json());

app.post('/', (req, res)=>{
    let value = req.body.value;
    const privateKey = fs.readFileSync('./store/privateKey.pem', 'utf8');
    const original = new nodersa(privateKey).decrypt(value, 'utf8');
    res.end(original);
});

app.listen(8000, ()=>{
    console.log('on 8000');
});