HttpListenerRequest.ClientCertificateError 屬性

定義

命名空間:

System.Net

組件:

System.Net.HttpListener.dll

來源:

HttpListenerRequest.cs

取得錯誤碼，識別用戶端所提供之 X509Certificate 的問題。

public:
 property int ClientCertificateError { int get(); };

public int ClientCertificateError { get; }

member this.ClientCertificateError : int

Public ReadOnly Property ClientCertificateError As Integer

屬性值

Int32

Int32 值，包含 Windows 錯誤碼。

例外狀況

InvalidOperationException

用戶端憑證尚未透過呼叫 BeginGetClientCertificate(AsyncCallback, Object) 或 GetClientCertificate() 方法初始化。

-或-

作業仍在進行。

範例

下列程式代碼範例會檢查這個屬性，以判斷要求是否包含有效的客戶端憑證。

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;
}

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

備註

此屬性包含安全通道 (安全通道) 安全性支援提供者介面 (SSPI) 傳回的 Windows 錯誤碼，用來驗證憑證。 如需 SSPI 支援 Schannel 的詳細資訊，請參閱 使用 Schannel 建立安全連線。

另請參閱

• HttpListener
• HttpListenerContext
• HttpListenerResponse