using System;
using System.ServiceModel;
using System.Net;
using System.Net.Sockets;
using System.Net.Security;
using System.Text;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.IdentityModel.Tokens;
using System.IdentityModel.Selectors;

namespace ConsoleApp
{
    public class Program
    {
        static X509Certificate serverCertificate = null;

public static void RunServer()
        {
            //serverCertificate = X509Certificate.CreateFromSignedFile(@"C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\samool.pvk");
            TcpListener listener = new TcpListener(IPAddress.Parse("192.168.20.139"), 901);
            listener.Start();
            while (true)
            {
                try
                {
                    Console.WriteLine("Waiting for a client to connect...");
                    TcpClient client = listener.AcceptTcpClient();
                    ProcessClient(client);
                }
                catch
                {
 
                }
            }
        }

static void ProcessClient(TcpClient client)
        {
            SslStream sslStream = new SslStream(client.GetStream(), false);
            try
            {
                sslStream.AuthenticateAsServer(serverCertificate, false, SslProtocols.Tls, true);
                DisplaySecurityLevel(sslStream);
                DisplaySecurityServices(sslStream);
                DisplayCertificateInformation(sslStream);
                DisplayStreamProperties(sslStream);

sslStream.ReadTimeout = 5000;
                sslStream.WriteTimeout = 5000;
                Console.WriteLine("Waiting for client message...");
                string messageData = ReadMessage(sslStream);
                Console.WriteLine("Received: {0}", messageData);
                byte[] message = Encoding.UTF8.GetBytes("Hello from the server.");
                Console.WriteLine("Sending hello message.");
                sslStream.Write(message);
            }
            catch (AuthenticationException e)
            {
                Console.WriteLine("Exception: {0}", e.Message);
                if (e.InnerException != null)
                {
                    Console.WriteLine("Inner exception: {0}", e.InnerException.Message);
                }
                Console.WriteLine("Authentication failed - closing the connection.");
                sslStream.Close();
                client.Close();
                return;
            }
            finally
            {
                sslStream.Close();
                client.Close();
            }
        }

static string ReadMessage(SslStream sslStream)
        {
            byte[] buffer = new byte[2048];
            StringBuilder messageData = new StringBuilder();
            int bytes = -1;
            do
            {
                bytes = sslStream.Read(buffer, 0, buffer.Length);
                Decoder decoder = Encoding.UTF8.GetDecoder();
                char[] chars = new char[decoder.GetCharCount(buffer, 0, bytes)];
                decoder.GetChars(buffer, 0, bytes, chars, 0);
                messageData.Append(chars);
                if (messageData.ToString().IndexOf("") != -1)
                {
                    break;
                }
            }
            while (bytes != 0);

return messageData.ToString();
        }

static void DisplaySecurityLevel(SslStream stream)
        {
            Console.WriteLine("Cipher: {0} strength {1}", stream.CipherAlgorithm, stream.CipherStrength);
            Console.WriteLine("Hash: {0} strength {1}", stream.HashAlgorithm, stream.HashStrength);
            Console.WriteLine("Key exchange: {0} strength {1}", stream.KeyExchangeAlgorithm, stream.KeyExchangeStrength);
            Console.WriteLine("Protocol: {0}", stream.SslProtocol);
        }

static void DisplaySecurityServices(SslStream stream)
        {
            Console.WriteLine("Is authenticated: {0} as server? {1}", stream.IsAuthenticated, stream.IsServer);
            Console.WriteLine("IsSigned: {0}", stream.IsSigned);
            Console.WriteLine("Is Encrypted: {0}", stream.IsEncrypted);
        }

static void DisplayStreamProperties(SslStream stream)