Ejemplo n.º 1
0
        async void AsyncTcpProcess(object o)
        {
            TcpClient     tc     = (TcpClient)o;
            NetworkStream stream = tc.GetStream();

            byte[] encryptedInput, decryptedOutput, encryptedOutput;
            byte[] data;
            int    numBytesRead = 0;

            byte[] outBuf = new byte[1024];

            using (var ms = new MemoryStream()) {
                while (stream.DataAvailable && (numBytesRead = stream.Read(outBuf, 0, outBuf.Length)) > 0)
                {
                    ms.Write(outBuf, 0, numBytesRead);
                }
                encryptedInput = ms.ToArray();
            }
            System.Console.WriteLine(Encoding.UTF8.GetString(encryptedInput));
            string[] split = Encoding.UTF8.GetString(encryptedInput).Split('|');
            if (split.Length < 2)
            {
                stream.Write(new byte[] { 00 }, 0, 1);
                stream.Close();
                return;
            }
            string ipAddr = split[0];
            int    port   = Int32.Parse(split[1]);

            data = SecurityModule.AESDecrypt256(Convert.FromBase64String(split[2]), key);

            System.Console.WriteLine(BitConverter.ToString(data).Replace('-', ' '));
            System.Console.WriteLine($"Opening socket to {ipAddr}:{port}");
            TcpClient proxy = new TcpClient();

            proxy.Connect(ipAddr, port);
            System.Console.WriteLine($"Socket opened to {ipAddr}:{port} - status: {proxy.Connected}");
            System.Console.WriteLine($"Sending {data.Length} bytes");
            NetworkStream proxyStream = proxy.GetStream();

            proxyStream.Write(data, 0, data.Length);
            System.Console.WriteLine($"Sent {data.Length} bytes");

            int nBytes = 0;

            using (var ms = new MemoryStream()) {
                try {
                    while ((numBytesRead = proxyStream.Read(outBuf, 0, outBuf.Length)) > 0)
                    {
                        ms.Write(outBuf, 0, numBytesRead);
                        nBytes += numBytesRead;
                    }
                } catch (IOException e) {
                    System.Console.WriteLine("Stream closed");
                }
                decryptedOutput = ms.ToArray();
            }
            System.Console.WriteLine($"Received {nBytes} bytes from remote");
            System.Console.WriteLine(BitConverter.ToString(decryptedOutput).Replace("-", " "));

            encryptedOutput = SecurityModule.AESEncrypt256(decryptedOutput, key);
            stream.Write(encryptedOutput, 0, encryptedOutput.Length);
            System.Console.WriteLine($"Sent {encryptedOutput.Length} bytes to proxy client");
            stream.Flush();
            stream.Close();
        }