c# – 从文件加载客户端证书的HttpClient

我想将相互身份验证添加到在IIS服务器下运行的客户端.NET应用程序(它是一个调用其他Web服务的Web服务).客户端应用程序从文件加载客户端证书,它在我的开发机器上使用以下代码正常工作(我尝试使用.NET 4.6.2的 Windows 7和 Windows 10)：

var handler = new WebRequestHandler();
var certificate = new X509Certificate2(clientCertPath); -- PFX file with client cert and private key 
handler.ClientCertificates.Add(certificate);
handler.AuthenticationLevel = AuthenticationLevel.MutualAuthRequired;
client = new HttpClient(handler);

但是当此代码部署到生产Windows 2016 Server计算机时,应用程序将抛出请求已中止：无法创建SSL / TLS安全通道.

我启用了对System.Net的跟踪,这就是我在日志中看到的

SecureChannel#66407304 - Certificate is of type X509Certificate2 and contains the private key.
AcquireCredentialsHandle(package = Microsoft Unified Security Protocol Provider,intent  = Outbound,scc     = System.Net.SecureCredential)
AcquireCredentialsHandle() failed with error 0X8009030D.
AcquireCredentialsHandle(package = Microsoft Unified Security Protocol Provider,scc     = System.Net.SecureCredential)
AcquireCredentialsHandle() failed with error 0X8009030D.
Exception in HttpWebRequest#60537518:: - The request was aborted: Could not create SSL/TLS secure channel..

事实证明,此错误是由于缺少IIS用户在PFX文件中读取私钥的权限而导致的.因此,当我将其导入机器证书存储区并通过单击客户端证书上的右键添加IIS_IUSRS时所有任务 – >管理私钥……一切正常,但我想避免这种情况.

有没有办法处理从Windows Server上的文件加载的客户端证书,并且不将客户端证书PFX文件导入证书存储区？