feat: update client and server

Add message transfer from server to client and update the code.

Author: Heziode

tls-client.js

@@ -5,7 +5,7 @@ const port = 8000;
 const hostname = 'localhost';
 
 const tls = require('tls');
-var fs = require('fs');
+const fs = require('fs');
 
 const options = {
   host: hostname,
@@ -19,21 +19,27 @@ const options = {
   ca: fs.readFileSync('certs/ca/ca.crt')
 };
 
-var socket = tls.connect(options, () => {
-  console.log('client connected',
-              socket.authorized ? 'authorized' : 'unauthorized');
-  process.stdin.pipe(socket);
-  process.stdin.resume();
-
-  socket.end();
+const socket = tls.connect(options, () => {
+  console.log('client connected', socket.authorized ? 'authorized' : 'unauthorized');
+  if (!socket.authorized) {
+    console.log("Error: ", client.authorizationError());
+    socket.end();
+  }
 })
-
-.setEncoding('utf8')
-
-.on('data', (data) => {
-  console.log(data);
-})
-
-.on('end', () => {
-  console.log("End connection");
-});
+  .setEncoding('utf8')
+  .on('data', (data) => {
+    console.log("Received: ", data);
+
+    // Close after receive data
+    socket.end();
+  })
+  .on('close', () => {
+    console.log("Connection closed");
+  })
+  .on('end', () => {
+    console.log("End connection");
+  })
+  .on('error', (error) => {
+    console.error(error);
+    socket.destroy();
+  });

tls-server.js

@@ -6,30 +6,27 @@ const fs = require('fs');
 const port = 8000;
 
 const options = {
-    key: fs.readFileSync('certs/server/server.key'),
-    cert: fs.readFileSync('certs/server/server.crt'),
-    ca: fs.readFileSync('certs/ca/ca.crt'), // authority chain for the clients
-    requestCert: true, // ask for a client cert
-    //rejectUnauthorized: false, // act on unauthorized clients at the app level
+  key: fs.readFileSync('certs/server/server.key'),
+  cert: fs.readFileSync('certs/server/server.crt'),
+  ca: fs.readFileSync('certs/ca/ca.crt'), // authority chain for the clients
+  requestCert: true, // ask for a client cert
+  //rejectUnauthorized: false, // act on unauthorized clients at the app level
 };
 
-var server = tls.createServer(options, (socket) => {
+const server = tls.createServer(options, (socket) => {
   socket.write('welcome!\n');
   socket.setEncoding('utf8');
   socket.pipe(socket);
 })
+  .on('connection', () => {
+    console.log('insecure connection');
+  })
 
-.on('connection', function(c)
-{
-	console.log('insecure connection');
-})
-
-.on('secureConnection', function (c)
-{
-	// c.authorized will be true if the client cert presented validates with our CA
-	console.log('secure connection; client authorized: ', c.authorized);
-})
+  .on('secureConnection', (socket) => {
+    // c.authorized will be true if the client cert presented validates with our CA
+    console.log('secure connection; client authorized: ', socket.authorized);
+  })
 
-.listen(port, function() {
-	console.log('server listening on port ' + port + '\n');
-});
+  .listen(port, () => {
+    console.log('server listening on port ' + port + '\n');
+  });