Crednet Access

using System;
using System.Text;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using BDC.BDCCommons;

namespace QueryCrednet
{
    public class SSLClient
    {
        private string m_server;
        private string m_host;
        private int    m_port;

        private SslStream m_sslStream;

        private const byte EOF = 0x0003;

        public SSLClient (string dnsServer, string host, int port)
        {
            m_server = dnsServer;
            m_host   = host;
            m_port   = port;
        }

        public bool ValidateCertificate (Object sender, X509Certificate certificate, X509Chain chain,SslPolicyErrors errors)
        {
            if (errors == SslPolicyErrors.None)
            {
                return true;
            }

            return false;
        }

        public void WriteMessage (string message)
        {
            // Creates Host
            using (TcpClient client = new TcpClient (m_host, m_port))
            {
                // Creating SSL Stream
                m_sslStream = new SslStream(client.GetStream (),false, new RemoteCertificateValidationCallback(ValidateCertificate),null);

                // Creating Connection
                try
                {
                   // Authentication will be executed as a client
                    m_sslStream.AuthenticateAsClient (m_server);
                }
                catch (AuthenticationException ex)
                {
                   LogWriter.Error (ex);
                }

               // Encoding message
               byte[] encodedMessage = Encoding.UTF8.GetBytes (message);
               m_sslStream.Write (encodedMessage);
               m_sslStream.WriteByte (EOF);
               m_sslStream.Flush ();
            }
        }

        public string ReadMessage()
        {
            // Creating buffer with stream size
            byte[]        buffer      = new byte[2048];

            // Message Container
            StringBuilder messageData = new StringBuilder();

            int bytes = - 1;
            do
            {
                // Reading Stream
                bytes = m_sslStream.Read (buffer, 0, buffer.Length);

                // Decoding Message
                Decoder decoder = Encoding.UTF8.GetDecoder ();
                char[] chars = new char[decoder.GetCharCount (buffer,0,bytes)];
                decoder.GetChars (buffer, 0, bytes, chars, 0);

                // Reading message
                messageData.Append (chars);

            } while (bytes != 0 && bytes != EOF);

            return messageData.ToString();
        }
    }
}