Primus.io: How to do two-way SSL

client.js

var fs = require('fs');
var Primus = require('primus');

var Socket = Primus.createSocket({ transformer: 'websockets' });
var socket = new Socket('https://localhost:8443', { transport: {
  key: fs.readFileSync('client.key'),
  cert: fs.readFileSync('client.crt'),
  rejectUnauthorized: false
} });

socket.on('open', function() {
  console.log('Cool, it works!');
});

server.js

var fs = require('fs');
var https = require('https');
var express = require('express');
var Primus = require('primus');

var port = 8443;

var options = {
  key: fs.readFileSync('localhost.key'),
  cert: fs.readFileSync('localhost.crt'),
  ca: fs.readFileSync('cacert.crt'),
  crl: fs.readFileSync('ca.crl'),
  requestCert: true,
  rejectUnauthorized: true
};

// HTTP Server
var app = express();
var server = https.createServer(options, app);

var primus = new Primus(server, { transformer: 'websockets' });

server.listen(port, function() {
  console.log('Express now listening on port %d', port);
});

primus.on('connection', function(spark) {
  console.log('Primus: spark %s', spark.id, spark.remote.connection.getPeerCertificate().subject.CN);
});