看到一段有趣的 code ，就是有網路上的大大用 python 寫了一個模擬自己試 RDP Server
然後看了一下，程式碼不難，我就翻寫成 C# ，測了一下，蠻好玩的就分享一下..
原文程式碼: https://github.com/cheeseandcereal/fake-rdp/blob/master/fake_rdp.py
因為其實我就是無腦改寫，其中我把 port 改成 3391
var serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
serverSocket.Bind(new IPEndPoint(IPAddress.Parse("0.0.0.0"), 3391));
serverSocket.Listen(5);
while (true)
{
try
{
var clientSocket = serverSocket.Accept();
Console.WriteLine("Received connection from {0}", clientSocket.RemoteEndPoint +" @"+DateTime.Now.ToString());
byte[] buffer = new byte[256];
int bytesRead = clientSocket.Receive(buffer);
Console.WriteLine(System.Text.Encoding.ASCII.GetString(buffer) + " |" + DateTime.Now.ToString());
byte[] initPacket = { 0x03, 0x00, 0x00, 0x13, 0x0E, 0xD0, 0x00, 0x00, 0x12, 0x34, 0x00, 0x02, 0x09, 0x08, 0x00, 0x02, 0x00, 0x00, 0x00 };
clientSocket.Send(initPacket);
bytesRead = clientSocket.Receive(buffer);
Console.WriteLine(System.Text.Encoding.ASCII.GetString(buffer) + " ||" + DateTime.Now.ToString());
var response = "Microsoft Terminal Services";
// Wait before sending a response (resulting in a client-side error)
Thread.Sleep(2000);
clientSocket.Send(Encoding.Default.GetBytes(response));
clientSocket.Close();
}
catch (Exception ex)
{
Console.WriteLine("ErrorMessage : {0}", ex.Message + " @" + DateTime.Now.ToString());
}
}
跑起來測試看看，竟然可以到輸入帳號密碼的步驟，之後才是跳出錯錯誤視窗..
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本文原文首發於我的個人部落格：使用 C# 做一個假裝自己是 RDP Server
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The bug existed in all possible states.
Until I ran the code.
