.NET C# “根据验证程序，远程证书无效”

Question

我在使用HttpClient REST拨打 REST 时遇到问题。

1. 我有一个在 .NET Core 中开发的应用程序，它在 Windows 和 Linux 机器上运行。
2. 此应用程序调用https://dev.example.com/ 。
3. SSL 证书有效，并且具有所有必需的中间证书和链式证书。
4. 此证书是为域为*.example.com的所有 URL 颁发的。 这意味着相同的证书应该适用于dev.example.com 、 test.example.com 、 stage.example.com以及prod.example.com 。
5. 当我们在 Windows 10 机器上执行时，.NET 核心应用程序运行良好。 然而，当我们在 Windows 7 机器上执行它时，我们会遇到问题。

我还尝试在使用HttpClientHandler class 发送请求时使用证书文件 (.cer)。在 Windows 7 机器上，我还尝试下载证书并将其添加到受信任的证书中。 但是，我仍然面临这个问题。

下面是堆栈跟踪。

ERROR ======================= :: System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
   at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, ExceptionDispatchInfo exception)
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Security.SslState.ThrowIfExceptional()
   at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)
   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__47_1(IAsyncResult iar)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask`1 creationTask)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)

更新

我尝试用IE web浏览器获取证书信息。

在Windows 10系统上，可以看到完整的证书信息。 但是，在 Windows 7 系统上，我可以看到消息为

证书无法验证到受信任的证书颁发机构

Answer 1

最后，我能够解决这个问题。

我发现该服务是由 Windows 7 系统上的一个用户创建的，但是，它正在被另一个用户调用。

我尝试通过控制台（命令提示符）执行该应用程序，发现该应用程序能够通过 HTTPS 进行调用。但是，当我们将其作为服务运行时，它无法执行此操作。

使用 sc 命令创建时修改了服务配置。

sc create <servicename> binPath= <path/to/your/appexe.exe> obj= <username> password= <password>

我们通过此更改使应用程序能够通过 HTTPS 进行呼叫。