using System;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Text;

namespace Examples.NegotiateStreamExample
{
    public class ASynchronousAuthenticatingTcpClient 
    {   
        static TcpClient client = null;

        public static void Main(String[] args)  
        {
            // Establish the remote endpoint for the socket.
            // For this example, use the local machine.
            IPHostEntry ipHostInfo = Dns.GetHostEntry("localhost");
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            // Client and server use port 11000. 
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);
            // Create a TCP/IP socket.
            client = new TcpClient();
            // Connect the socket to the remote endpoint.
            client.Connect(remoteEP);
            Console.WriteLine("Client connected to {0}.", remoteEP.ToString());
            // Ensure the client does not close when there is 
            // still data to be sent to the server.
            client.LingerState = (new LingerOption(true, 0));
            // Request authentication.
            NetworkStream clientStream = client.GetStream();
            NegotiateStream authStream = new NegotiateStream(clientStream, false); 
            // Pass the NegotiateStream as the AsyncState object 
            // so that it is available to the callback delegate.
            IAsyncResult ar = authStream.BeginAuthenticateAsClient(
                new AsyncCallback(EndAuthenticateCallback),
                authStream
                );
            Console.WriteLine("Client waiting for authentication...");
            // Wait until the result is available.
            ar.AsyncWaitHandle.WaitOne();
            // Display the properties of the authenticated stream.
            AuthenticatedStreamReporter.DisplayProperties(authStream);
            // Send a message to the server.
            // Encode the test data into a byte array.
            byte[] message = Encoding.UTF8.GetBytes("Hello from the client.");
            ar = authStream.BeginWrite(message, 0, message.Length,
                new AsyncCallback(EndWriteCallback),
                authStream);
            ar.AsyncWaitHandle.WaitOne();
            Console.WriteLine("Sent {0} bytes.", message.Length);
            // Close the client connection.
            authStream.Close();
            Console.WriteLine("Client closed.");
        }
        // The following method is called when the authentication completes.
        public static void EndAuthenticateCallback (IAsyncResult ar)
        {
            Console.WriteLine("Client ending authentication...");
            NegotiateStream authStream = (NegotiateStream) ar.AsyncState;
            Console.WriteLine("ImpersonationLevel: {0}", authStream.ImpersonationLevel);

            // End the asynchronous operation.
            authStream.EndAuthenticateAsClient(ar);
        }
        // The following method is called when the write operation completes.
        public static void EndWriteCallback (IAsyncResult ar)
        {
            Console.WriteLine("Client ending write operation...");
            NegotiateStream authStream = (NegotiateStream) ar.AsyncState;

            // End the asynchronous operation.
            authStream.EndWrite(ar);
        }
    }

    // The following class displays the properties of an authenticatedStream.
    public class AuthenticatedStreamReporter
{
    public static void DisplayProperties(AuthenticatedStream stream)
   {
        Console.WriteLine("IsAuthenticated: {0}", stream.IsAuthenticated);
        Console.WriteLine("IsMutuallyAuthenticated: {0}", stream.IsMutuallyAuthenticated);
        Console.WriteLine("IsEncrypted: {0}", stream.IsEncrypted);
        Console.WriteLine("IsSigned: {0}", stream.IsSigned);
        Console.WriteLine("IsServer: {0}", stream.IsServer);
    }
}
}

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::Net::Security;
using namespace System::Net::Sockets;
using namespace System::Text;

// The following class displays the properties of an authenticatedStream.
public ref class AuthenticatedStreamReporter
{
public:
   static void DisplayProperties( AuthenticatedStream^ stream )
   {
      Console::WriteLine( L"IsAuthenticated: {0}", stream->IsAuthenticated );
      Console::WriteLine( L"IsMutuallyAuthenticated: {0}", stream->IsMutuallyAuthenticated );
      Console::WriteLine( L"IsEncrypted: {0}", stream->IsEncrypted );
      Console::WriteLine( L"IsSigned: {0}", stream->IsSigned );
      Console::WriteLine( L"IsServer: {0}", stream->IsServer );
   }

};


public ref class ASynchronousAuthenticatingTcpClient
{
private:
   static TcpClient^ client = nullptr;

public:
   void Main()
   {

      // Establish the remote endpoint for the socket.
      // For this example, use the local machine.
      IPHostEntry^ ipHostInfo = Dns::GetHostEntry( Dns::GetHostName() );
      IPAddress^ ipAddress = ipHostInfo->AddressList[ 0 ];

      // Client and server use port 11000. 
      IPEndPoint^ remoteEP = gcnew IPEndPoint( ipAddress,11000 );

      // Create a TCP/IP socket.
      client = gcnew TcpClient;

      // Connect the socket to the remote endpoint.
      client->Connect( remoteEP );
      Console::WriteLine( L"Client connected to {0}.", remoteEP );

      // Ensure the client does not close when there is 
      // still data to be sent to the server.
      client->LingerState = (gcnew LingerOption( true,0 ));

      // Request authentication.
      NetworkStream^ clientStream = client->GetStream();
      NegotiateStream^ authStream = gcnew NegotiateStream( clientStream,false );

      // Pass the NegotiateStream as the AsyncState object 
      // so that it is available to the callback delegate.
      IAsyncResult^ ar = authStream->BeginAuthenticateAsClient( gcnew AsyncCallback( EndAuthenticateCallback ), authStream );

      Console::WriteLine( L"Client waiting for authentication..." );

      // Wait until the result is available.
      ar->AsyncWaitHandle->WaitOne();

      // Display the properties of the authenticated stream.
      AuthenticatedStreamReporter::DisplayProperties( authStream );

      // Send a message to the server.
      // Encode the test data into a byte array.
      array<Byte>^message = Encoding::UTF8->GetBytes( L"Hello from the client." );
      ar = authStream->BeginWrite( message, 0, message->Length, gcnew AsyncCallback( EndWriteCallback ), authStream );

      ar->AsyncWaitHandle->WaitOne();
      Console::WriteLine( L"Sent {0} bytes.", message->Length );

      // Close the client connection.
      authStream->Close();
      Console::WriteLine( L"Client closed." );
   }


   // The following method is called when the authentication completes.
   static void EndAuthenticateCallback( IAsyncResult^ ar )
   {
      Console::WriteLine( L"Client ending authentication..." );
      NegotiateStream^ authStream = dynamic_cast<NegotiateStream^>(ar->AsyncState);

      // End the asynchronous operation.
      authStream->EndAuthenticateAsClient( ar );

      //         Console.WriteLine("AllowedImpersonation: {0}", authStream.AllowedImpersonation);
   }


   // The following method is called when the write operation completes.
   static void EndWriteCallback( IAsyncResult^ ar )
   {
      Console::WriteLine( L"Client ending write operation..." );
      NegotiateStream^ authStream = dynamic_cast<NegotiateStream^>(ar->AsyncState);

      // End the asynchronous operation.
      authStream->EndWrite( ar );
   }

};

void main()
{
   ASynchronousAuthenticatingTcpClient^ aatc = gcnew ASynchronousAuthenticatingTcpClient;
   aatc->Main();
}

using System;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Principal;
using System.Text;
using System.IO;
using System.Threading;

namespace Examples.NegotiateStreamExample
{
    public class AsynchronousAuthenticatingTcpListener 
    {
        public static void Main() 
        {   
            // Create an IPv4 TCP/IP socket. 
            TcpListener listener = new TcpListener(IPAddress.Any, 11000);
            // Listen for incoming connections.
            listener.Start();
            while (true) 
            {
                TcpClient clientRequest = null;
                // Application blocks while waiting for an incoming connection.
                // Type CNTL-C to terminate the server.
                clientRequest = listener.AcceptTcpClient();
                Console.WriteLine("Client connected.");
                // A client has connected. 
                try
                {
                    AuthenticateClient (clientRequest);
                }
                catch (Exception e)
                {
                    Console.WriteLine(e);
                    continue;
                }

            }

        }
        public static void AuthenticateClient(TcpClient clientRequest)
        {
            NetworkStream stream = clientRequest.GetStream(); 
            // Create the NegotiateStream.
            NegotiateStream authStream = new NegotiateStream(stream, false); 
            // Save the current client and NegotiateStream instance 
            // in a ClientState object.
            ClientState cState = new ClientState(authStream, clientRequest);
            // Listen for the client authentication request.
            authStream.BeginAuthenticateAsServer (
                new AsyncCallback(EndAuthenticateCallback),
                cState
                );
            // Wait until the authentication completes.
            cState.Waiter.WaitOne();
            cState.Waiter.Reset();
            authStream.BeginRead(cState.Buffer, 0, cState.Buffer.Length, 
                   new AsyncCallback(EndReadCallback), 
                   cState);
            cState.Waiter.WaitOne();
            // Finished with the current client.
            authStream.Close();
            clientRequest.Close();
        }
        // The following method is invoked by the
        // BeginAuthenticateAsServer callback delegate.

        public static void EndAuthenticateCallback (IAsyncResult ar)
        {
            // Get the saved data.
            ClientState cState = (ClientState) ar.AsyncState;
            TcpClient clientRequest = cState.Client;
            NegotiateStream authStream = (NegotiateStream) cState.AuthenticatedStream;
            Console.WriteLine("Ending authentication.");
            // Any exceptions that occurred during authentication are
            // thrown by the EndAuthenticateAsServer method.
            try 
            {
                // This call blocks until the authentication is complete.
                authStream.EndAuthenticateAsServer(ar);
            }
            catch (AuthenticationException e)
            {
                Console.WriteLine(e);
                Console.WriteLine("Authentication failed - closing connection.");
                cState.Waiter.Set();
                return;
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                Console.WriteLine("Closing connection.");
                cState.Waiter.Set();
                return;
            }
            // Display properties of the authenticated client.
            IIdentity id = authStream.RemoteIdentity;
            Console.WriteLine("{0} was authenticated using {1}.", 
                id.Name, 
                id.AuthenticationType
                );
            cState.Waiter.Set();

    }
        public static void EndReadCallback(IAsyncResult ar)
        {
            // Get the saved data.
            ClientState cState = (ClientState) ar.AsyncState;
            TcpClient clientRequest = cState.Client;
            NegotiateStream authStream = (NegotiateStream) cState.AuthenticatedStream; 
            // Get the buffer that stores the message sent by the client.
            int bytes = -1;
            // Read the client message.
            try
            {
                    bytes = authStream.EndRead(ar);
                    cState.Message.Append(Encoding.UTF8.GetChars(cState.Buffer, 0, bytes));
                    if (bytes != 0)
                    {
                         authStream.BeginRead(cState.Buffer, 0, cState.Buffer.Length, 
                               new AsyncCallback(EndReadCallback), 
                               cState);
                               return;
                 }
            }
            catch (Exception e)
            {
                // A real application should do something
                // useful here, such as logging the failure.
                Console.WriteLine("Client message exception:");
                Console.WriteLine(e);
                cState.Waiter.Set();
                return;
            }
            IIdentity id = authStream.RemoteIdentity;
            Console.WriteLine("{0} says {1}", id.Name, cState.Message.ToString());
            cState.Waiter.Set();
        }
    }
    // ClientState is the AsyncState object.
    internal class ClientState
    {
        private AuthenticatedStream authStream = null;
        private  TcpClient client = null;
        byte[] buffer = new byte[2048];
        StringBuilder message = null;
        ManualResetEvent waiter = new ManualResetEvent(false);
        internal ClientState(AuthenticatedStream a, TcpClient theClient)
        {
            authStream = a;
            client = theClient;
        }
        internal TcpClient Client
        { 
            get { return client;}
        }
        internal AuthenticatedStream AuthenticatedStream
        {
            get { return authStream;}
        }
        internal byte[] Buffer
        {
              get { return buffer;}
        }
        internal StringBuilder Message
        {
            get 
            { 
                if (message == null)
                    message = new StringBuilder();
                return message;
             }
        }
        internal ManualResetEvent Waiter
        {
            get 
            { 
                return waiter;
             }
        }
    }
}

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::Net::Security;
using namespace System::Net::Sockets;
using namespace System::Security::Authentication;
using namespace System::Security::Principal;
using namespace System::Text;
using namespace System::IO;
using namespace System::Threading;

// ClientState is the AsyncState object.
private ref class ClientState
{
private:
   AuthenticatedStream^ authStream;
   TcpClient^ client;
   array<Byte>^buffer;
   StringBuilder^ message;
   ManualResetEvent^ waiter;

internal:
   ClientState( AuthenticatedStream^ a, TcpClient^ theClient )
   {
      authStream = a;
      client = theClient;
      message = nullptr;
      buffer = gcnew array<Byte>(2048);
      waiter = gcnew ManualResetEvent( false );
   }

internal:
   property TcpClient^ Client 
   {
      TcpClient^ get()
      {
         return client;
      }
   }

   property AuthenticatedStream^ AuthStream 
   {
      AuthenticatedStream^ get()
      {
         return authStream;
      }
  }

   property array<Byte>^ Buffer 
   {
      array<Byte>^ get()
      {
         return buffer;
      }

   }

   property StringBuilder^ Message 
   {
      StringBuilder^ get()
      {
         if ( message == nullptr )
                  message = gcnew StringBuilder;

         return message;
      }

   }

   property ManualResetEvent^ Waiter 
   {
      ManualResetEvent^ get()
      {
         return waiter;
      }

   }

};

public ref class AsynchronousAuthenticatingTcpListener
{
public:
   int Main()
   {

      // Create an IPv4 TCP/IP socket. 
      TcpListener^ listener = gcnew TcpListener( IPAddress::Any,11000 );

      // Listen for incoming connections.
      listener->Start();
      while ( true )
      {
         TcpClient^ clientRequest = nullptr;

         // Application blocks while waiting for an incoming connection.
         // Type CNTL-C to terminate the server.
         clientRequest = listener->AcceptTcpClient();
         Console::WriteLine( L"Client connected." );

         // A client has connected. 
         try
         {
            AuthenticateClient( clientRequest );
         }
         catch ( Exception^ e ) 
         {
            Console::WriteLine( e );
            continue;
         }

      }
   }


   static void AuthenticateClient( TcpClient^ clientRequest )
   {
      NetworkStream^ stream = clientRequest->GetStream();

      // Create the NegotiateStream.
      NegotiateStream^ authStream = gcnew NegotiateStream( stream,false );

      // Save the current client and NegotiateStream instance 
      // in a ClientState object.
      ClientState^ cState = gcnew ClientState( authStream,clientRequest );

      // Listen for the client authentication request.
      authStream->BeginAuthenticateAsServer( gcnew AsyncCallback( EndAuthenticateCallback ), cState );

      // Wait until the authentication completes.
      cState->Waiter->WaitOne();
      cState->Waiter->Reset();
      authStream->BeginRead( cState->Buffer, 0, cState->Buffer->Length, gcnew AsyncCallback( EndReadCallback ), cState );
      cState->Waiter->WaitOne();

      // Finished with the current client.
      authStream->Close();
      clientRequest->Close();
   }


   // The following method is invoked by the
   // BeginServerAuthenticate callback delegate.
   static void EndAuthenticateCallback( IAsyncResult^ ar )
   {

      // Get the saved data.
      ClientState^ cState = dynamic_cast<ClientState^>(ar->AsyncState);
      TcpClient^ clientRequest = cState->Client;
      NegotiateStream^ authStream = dynamic_cast<NegotiateStream^>(cState->AuthStream);
      Console::WriteLine( L"Ending authentication." );

      // Any exceptions that occurred during authentication are
      // thrown by the EndServerAuthenticate method.
      try
      {

         // This call blocks until the authentication is complete.
         authStream->EndAuthenticateAsServer( ar );
      }
      catch ( AuthenticationException^ e ) 
      {
         Console::WriteLine( e );
         Console::WriteLine( L"Authentication failed - closing connection." );
         cState->Waiter->Set();
         return;
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( e );
         Console::WriteLine( L"Closing connection." );
         cState->Waiter->Set();
         return;
      }


      // Display properties of the authenticated client.
      IIdentity^ id = authStream->RemoteIdentity;
      Console::WriteLine( L"{0} was authenticated using {1}.", id->Name, id->AuthenticationType );
      cState->Waiter->Set();
   }


   static void EndReadCallback( IAsyncResult^ ar )
   {

      // Get the saved data.
      ClientState^ cState = dynamic_cast<ClientState^>(ar->AsyncState);
      TcpClient^ clientRequest = cState->Client;
      NegotiateStream^ authStream = dynamic_cast<NegotiateStream^>(cState->AuthStream);

      // Get the buffer that stores the message sent by the client.
      int bytes = -1;

      // Read the client message.
      try
      {
         bytes = authStream->EndRead( ar );
         cState->Message->Append( Encoding::UTF8->GetChars( cState->Buffer, 0, bytes ) );
         if ( bytes != 0 )
         {
            authStream->BeginRead( cState->Buffer, 0, cState->Buffer->Length, gcnew AsyncCallback( EndReadCallback ), cState );
            return;
         }
      }
      catch ( Exception^ e ) 
      {

         // A real application should do something
         // useful here, such as logging the failure.
         Console::WriteLine( L"Client message exception:" );
         Console::WriteLine( e );
         cState->Waiter->Set();
         return;
      }

      IIdentity^ id = authStream->RemoteIdentity;
      Console::WriteLine( L"{0} says {1}", id->Name, cState->Message );
      cState->Waiter->Set();
   }

};

void main()
{
   AsynchronousAuthenticatingTcpListener^ aatl = gcnew AsynchronousAuthenticatingTcpListener;
   aatl->Main();
}