双向 SSL - X509Certificate2.CreateFromPemFile - WINHTTP_CALLBACK_STATUS_REQUEST_ERROR

Question

我正在尝试调用需要双向 SSL (TLS 1.2) 的 API，并且我有以下代码：

var myCert = X509Certificate2.CreateFromPemFile(_publicFilename, _privateFilename);

using (var handler = new WinHttpHandler())
{
    handler.ClientCertificateOption = ClientCertificateOption.Manual;
    handler.ServerCertificateValidationCallback = (x, y, z, w) => true;
    handler.ClientCertificates.Add(myCert);
    handler.SslProtocols = SslProtocols.Tls12;

    using (var client = new HttpClient(handler))
    {
        var postData = new StringContent("", UnicodeEncoding.UTF8, "application/json");
        var response = await client.PostAsync("<API Endpoint>", postData);

        string responseString = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseString);
    }
}

但是，当我调用它时，出现以下 WinHttp 异常：

Error 12185 calling WINHTTP_CALLBACK_STATUS_REQUEST_ERROR, 'No credentials were available in the client certificate.'.

同样在 windows 事件查看器中，我收到以下错误消息：

The TLS client credential's certificate does not have a private key information property attached to it. This most often occurs when a certificate is backed up incorrectly and then later restored. This message can also indicate a certificate enrollment failure.

无法弄清楚问题出在哪里。我在邮递员中使用完全相同的证书和密钥，它工作正常。

Answer 1

Windows 上的 TLS（WinHttpHandler、SslStream 或默认的 HTTP 处理程序（使用 SslStream））要求证书具有命名的私钥。

您可以通过在没有 PersistKeySet 的情况下导入 PFX 来临时执行此操作...但是您如何获得 PFX？嗯，很简单。

var myCert = X509Certificate2.CreateFromPemFile(_publicFilename, _privateFilename);

using (var tmpCert = new X509Certificate2(myCert.Export(X509ContentType.Pfx)))
using (var handler = new WinHttpHandler())
{
    ...
    handler.ClientCertificates.Add(tmpCert);
    ...
}

当 tmpCert 被处置时，指定的密钥将被删除。如果您的生命周期很复杂或很长，则可以不在 using 语句中创建证书。如果证书被垃圾收集并且进程保持活动状态足够长的时间以运行终结器，那么密钥将被清理。

双向 SSL - X509Certificate2.CreateFromPemFile - WINHTTP_CALLBACK_STATUS_REQUEST_ERROR

Two way SSL - X509Certificate2.CreateFromPemFile - WINHTTP_CALLBACK_STATUS_REQUEST_ERROR

c#

tls1.2

x509certificate2

winhttp