Sending Client Certificate in HttpWebRequest

Question

I am trying to pass a client certificate to a server using the code below however I still revive the HTTP Error 403.7 - Forbidden: SSL client certificate is required. What are the possible reasons the HttpWebRequest would not send the client certificate?

var clientCertificate = new X509Certificate2( @"C:\Development\TestClient.pfx", "bob" );

                    HttpWebRequest tRequest = ( HttpWebRequest )WebRequest.Create( "https://ofxtest.com/ofxr.dll" );

                    tRequest.ClientCertificates.Add( clientCertificate );
                    tRequest.PreAuthenticate = true;
                    tRequest.KeepAlive = true;
                    tRequest.Credentials = CredentialCache.DefaultCredentials;
                    tRequest.Method = "POST";
                    var encoder = new ASCIIEncoding();
                    var requestData = encoder.GetBytes( "<OFX></OFX>" );

                    tRequest.GetRequestStream().Write( requestData, 0, requestData.Length );
                    tRequest.GetRequestStream().Close();

                    ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback( CertPolicy.ValidateServerCertificate );
                    WriteResponse( tRequest.GetResponse() );

Answer 1

It could be the wrong cert, could be missing cert, etc.. Use Fiddler (free) as a proxy to intercept the traffic, and you'll see whether the cert is attached or not.

Answer 2

Is the password correct? I'm not familiar with the .net way of doing this, but I assume "bob" is the password. Change to "rick" and see if you get an error. If so, then you're probably doing it right. If everything is the same as if you use "bob", then there may be an issue with the password.