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/*
C# Network Programming
by Richard Blum
Publisher: Sybex
ISBN: 0782141765
*/
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Soap;
using System.Security;
using System.Security.Cryptography;
using System.Text;
public class CryptoDataRcvr
{
private SerialEmployee RecvData(NetworkStream strm)
{
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.CreateDecryptor(Key, IV),
CryptoStreamMode.Write);
byte[] data = new byte[2048];
int recv = strm.Read(data, 0, 4);
int size = BitConverter.ToInt32(data, 0);
int offset = 0;
while(size > 0)
{
recv = strm.Read(data, 0, size);
csw.Write(data, offset, recv);
offset += recv;
size -= recv;
}
csw.FlushFinalBlock();
IFormatter formatter = new SoapFormatter();
memstrm.Position = 0;
SerialEmployee emp = (SerialEmployee)formatter.Deserialize(memstrm);
memstrm.Close();
return emp;
}
public CryptoDataRcvr()
{
TcpListener server = new TcpListener(9050);
server.Start();
Console.WriteLine("Waiting for a client...");
TcpClient client = server.AcceptTcpClient();
NetworkStream strm = client.GetStream();
SerialEmployee emp1 = RecvData(strm);
Console.WriteLine("emp1.EmployeeID = {0}", emp1.EmployeeID);
Console.WriteLine("emp1.LastName = {0}", emp1.LastName);
Console.WriteLine("emp1.FirstName = {0}", emp1.FirstName);
Console.WriteLine("emp1.YearsService = {0}", emp1.YearsService);
Console.WriteLine("emp1.Salary = {0}\n", emp1.Salary);
SerialEmployee emp2 = RecvData(strm);
Console.WriteLine("emp2.EmployeeID = {0}", emp2.EmployeeID);
Console.WriteLine("emp2.LastName = {0}", emp2.LastName);
Console.WriteLine("emp2.FirstName = {0}", emp2.FirstName);
Console.WriteLine("emp2.YearsService = {0}", emp2.YearsService);
Console.WriteLine("emp2.Salary = {0}", emp2.Salary);
strm.Close();
server.Stop();
}
public static void Main()
{
CryptoDataRcvr cdr = new CryptoDataRcvr();
}
}
[Serializable]
public class SerialEmployee
{
public int EmployeeID;
public string LastName;
public string FirstName;
public int YearsService;
public double Salary;
public SerialEmployee()
{
EmployeeID = 0;
LastName = null;
FirstName = null;
YearsService = 0;
Salary = 0.0;
}
}
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