C# iPhone push server?

Question

Im attempting to write a push server for the iPhone in C#. I have the following code:

        // Create a TCP/IP client socket.         using (TcpClient client = new TcpClient())         {             client.Connect("gateway.sandbox.push.apple.com", 2195);             using (NetworkStream networkStream = client.GetStream())             {                 Console.WriteLine("Client connected.");                  X509Certificate clientCertificate = new X509Certificate(@"certfile.p12", passwordHere);                 X509CertificateCollection clientCertificateCollection = new X509CertificateCollection(new X509Certificate[1] { clientCertificate });                  // Create an SSL stream that will close the client's stream.                 SslStream sslStream = new SslStream(                     client.GetStream(),                     false,                     new RemoteCertificateValidationCallback(ValidateServerCertificate),                     null                     );                  try                 {                     sslStream.AuthenticateAsClient("gateway.sandbox.push.apple.com");                 }                 catch (AuthenticationException e)                 {                     Console.WriteLine("Exception: {0}", e.Message);                     if (e.InnerException != null)                     {                         Console.WriteLine("Inner exception: {0}", e.InnerException.Message);                     }                     Console.WriteLine("Authentication failed - closing the connection.");                     client.Close();                     return;                 }             } 

ect....

Only I keep receiving a exception: "A call to SSPI failed, see Inner exception" Inner Exception -> "The message received was unexpected or badly formatted."

Does anyone have any idea whats going wrong here?

Answer 1

Figured it out. Replaced sslStream.AuthenticateAsClient("gateway.sandbox.push.apple.com"); with sslStream.AuthenticateAsClient("gateway.sandbox.push.apple.com", clientCertificateCollection, SslProtocols.Default, false); And registered the certificates on the PC.

Edit: Here is the code for creating a payload as requested:

    private static byte[] GeneratePayload(byte [] deviceToken, string message, string sound)     {         MemoryStream memoryStream = new MemoryStream();          // Command         memoryStream.WriteByte(0);          byte[] tokenLength = BitConverter.GetBytes((Int16)32);         Array.Reverse(tokenLength);         // device token length         memoryStream.Write(tokenLength, 0, 2);          // Token         memoryStream.Write(deviceToken, 0, 32);          // String length         string apnMessage = string.Format ( "{{\"aps\":{{\"alert\":{{\"body\":\"{0}\",\"action-loc-key\":null}},\"sound\":\"{1}\"}}}}",             message,             sound);          byte [] apnMessageLength = BitConverter.GetBytes((Int16)apnMessage.Length);         Array.Reverse ( apnMessageLength );         // message length         memoryStream.Write(apnMessageLength, 0, 2);          // Write the message         memoryStream.Write(System.Text.ASCIIEncoding.ASCII.GetBytes(apnMessage), 0, apnMessage.Length);          return memoryStream.ToArray();     } // End of GeneratePayload