How to create a pair private/public keys using Node.js crypto?

Question

I have to generate two keys (private and public) to encrypt a text with the public and let the user with the private key decrypt the text.

Is it possible with the mo

Answer 1

If you know how to get what you want from OpenSSL, I think it's perfectly reasonable to run OpenSSL using Node's child_process.

var cp = require('child_process')
  , assert = require('assert')
  ;

var privateKey, publicKey;
publicKey = '';
cp.exec('openssl genrsa 2048', function(err, stdout, stderr) {
  assert.ok(!err);
  privateKey = stdout;
  console.log(privateKey);
  makepub = cp.spawn('openssl', ['rsa', '-pubout']);
  makepub.on('exit', function(code) {
    assert.equal(code, 0); 
    console.log(publicKey);
  });
  makepub.stdout.on('data', function(data) {
    publicKey += data;
  });
  makepub.stdout.setEncoding('ascii');
  makepub.stdin.write(privateKey);
  makepub.stdin.end();  
});