Gets an error code that identifies a problem with the X509Certificate provided by the client.
Assembly: System (in System.dll)
| Exception | Condition |
|---|---|
| InvalidOperationException | The client certificate has not been initialized yet by a call to the BeginGetClientCertificate or GetClientCertificate methods -or - The operation is still in progress. |
This property contains a Windows error code returned by the Secure Channel (Schannel) Security Support Provider Interface (SSPI), which is used to validate the certificate. For more information about SSPI support for Schannel, see "Creating a Secure Connection Using Schannel" in the Security documentation at http://msdn.microsoft.com/library.
The following code example checks this property to determine whether the request includes a valid client certificate.
Console.WriteLine("Listening for {0} prefixes...", listener.Prefixes.Count)
Dim context As HttpListenerContext = listener.GetContext()
Dim request As HttpListenerRequest = context.Request
Console.WriteLine("Received a request.")
' This server requires a valid client certificate
' for requests that are not sent from the local computer.
' Did the client omit the certificate or send an invalid certificate?
If request.IsAuthenticated AndAlso request.GetClientCertificate() Is Nothing OrElse request.ClientCertificateError <> 0 Then
' Send a 403 response.
Dim badCertificateResponse As HttpListenerResponse = context.Response
SendBadCertificateResponse(badCertificateResponse)
Console.WriteLine("Client has invalid certificate.")
Continue Do
End If
Console.WriteLine("Listening for {0} prefixes...", listener.Prefixes.Count);
HttpListenerContext context = listener.GetContext();
HttpListenerRequest request = context.Request;
Console.WriteLine("Received a request.");
// This server requires a valid client certificate
// for requests that are not sent from the local computer.
// Did the client omit the certificate or send an invalid certificate?
if (request.IsAuthenticated &&
request.GetClientCertificate() == null ||
request.ClientCertificateError != 0)
{
// Send a 403 response.
HttpListenerResponse badCertificateResponse = context.Response ;
SendBadCertificateResponse(badCertificateResponse);
Console.WriteLine("Client has invalid certificate.");
continue;
}
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.