NetPro'09 - SecureSend

[Nati]

using System;

using System.IO;

using System.Net;

using System.Net.Sockets;

using System.Security;

using System.Security.Cryptography;

using System.Text;

namespace SecureSend

{

    class Program

    {

        static void Main(string[] args)

        {

            TcpClient client = new TcpClient("127.0.0.1", 9050);

            NetworkStream strm = client.GetStream();

            SendData(strm, "Hello");

     

            strm.Close();

            client.Close();

        }

        private static void SendData(NetworkStream strm, string phrase)

        {

            MemoryStream memstrm = new MemoryStream();

            byte[] Key = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 };

            byte[] IV = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 };

            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

            CryptoStream csw = new CryptoStream(memstrm, tdes.CreateEncryptor(Key, IV), CryptoStreamMode.Write);

            csw.Write(Encoding.ASCII.GetBytes(phrase), 0, phrase.Length);

            csw.FlushFinalBlock();

            byte[] data = memstrm.GetBuffer();

            int memsize = (int)memstrm.Length;

            //byte[] size = BitConverter.GetBytes(memsize);

            //strm.Write(size, 0, 4);

            strm.Write(data, 0, (int)memsize);

            strm.Flush();

            csw.Close();

            memstrm.Close();

        }

    }

}