public void Start()
{
//start the server
IPAddress iPAddress = Dns.GetHostEntry(hOST).AddressList[0];
TcpListener = new TcpListener(iPAddress, pORT);
try
{
TcpListener.Start();
Console.WriteLine("Server started...");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
while (true)
{
TcpClient tcpClient = TcpListener.AcceptTcpClient();
//hand shake
//Server send public key to client
SendPublicKey(tcpClient);
//Server read public key from client
string publicKeyFromClient = ReadPublicKey(tcpClient);
//handle login
//Read username and password from user
Message request = new Message();
var rsa = new EncryptionRSA();
rsa.SetPrivateKey(PrivateKey);
request.ReadFrom(tcpClient.GetStream(), rsa);
Message response = handlers[request.Header].Invoke(request);
if (response.Header.Equals("OK"))
{
Console.WriteLine("Client authenticated is connected...");
Console.WriteLine("server sends head: " + response.Header + " body " + response.Body);
var rsa2 = new EncryptionRSA();
rsa2.SetPublicKey(publicKeyFromClient);
response.WriteTo(tcpClient.GetStream(), rsa2);
RegisterClient(response.Body, publicKeyFromClient, tcpClient);
Thread thread = new Thread(() => HandleRequest(tcpClient));
thread.Start();
}
else
{
var rsa2 = new EncryptionRSA();
rsa2.SetPublicKey(publicKeyFromClient);
response.WriteTo(tcpClient.GetStream(), rsa2);
Console.WriteLine("Client failed to connect");
}
}
}
private void SendPublicKey(TcpClient tcpClient)
{
Message msgKey = new Message();
msgKey.Header = "PUBLIC_KEY";
msgKey.Body = PublicKeyToSend;
msgKey.WriteTo(tcpClient.GetStream());
}
private void SendPublicKey(TcpClient tcpClient)
{
Message msgKey = new Message();
msgKey.Header = "PUBLIC_KEY";
msgKey.Body = PublicKeyToSend;
Console.WriteLine("Server send key: " + msgKey.Body);
msgKey.WriteTo(tcpClient.GetStream());
}
private void broadcast(Message request)
{
foreach (Tuple <string, string, TcpClient> client in ActiveClients)
{
string publicKey = client.Item2;
var rsa = new EncryptionRSA();
rsa.SetPublicKey(publicKey);
request.WriteTo(client.Item3.GetStream(), rsa);
}
}