尽管设置了ServerCertificateValidationCallback，但无法创建SSL / TLS安全通道(Could not create SSL/TLS secure channel, despite setting ServerCertificateValidationCallback)

 我正在尝试建立SSL / TLS连接以使用自签名证书测试服务器 。 通过不安全的渠道进行沟通没有问题。 
 
 以下是我基于此解决方案编写的示例代码： 使用HttpClient C＃ 允许不可信的SSL证书 忽略证书错误？ .NET客户端连接到ssl Web API 
 
ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;

var c = new HttpClient();
var r = c.GetAsync("https://10.3.0.1:8443/rest/v1").Result;
if (r.IsSuccessStatusCode)
{
    Log.AddMessage(r.Content.Get<string>());
}
else
{
    Log.AddMessage(string.Format("{0} ({1})", (int)r.StatusCode, r.ReasonPhrase));
}
 
 也试过这个： 
 
var handler = new WebRequestHandler();
handler.ServerCertificateValidationCallback = delegate { return true; };
var c = new HttpClient(handler);
...
 
 和这个 
 
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
 
 但每次我有一个例外： 
 
InnerException: System.Net.Http.HttpRequestException
   _HResult=-2146233088
   _message=An error occurred while sending the request.
   HResult=-2146233088
   IsTransient=false
   Message=An error occurred while sending the request.
   InnerException: System.Net.WebException
        _HResult=-2146233079
        _message=The request was aborted: Could not create SSL/TLS secure channel.
        HResult=-2146233079
        IsTransient=false
        Message=The request was aborted: Could not create SSL/TLS secure channel.
        Source=System
        StackTrace:
             at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
             at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
        InnerException: 
 
 我做错了什么？ 为什么我无法连接到此服务器（它具有无效的自签名证书） 

I'm trying to establish SSL/TLS connection to test server with self-signed certificate. Communication through unsecure channel worked without issues.
 
Here is my sample code, which I've written based on this solutions: Allowing Untrusted SSL Certificates with HttpClient C# Ignore certificate errors? .NET client connecting to ssl Web API
 
ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;

var c = new HttpClient();
var r = c.GetAsync("https://10.3.0.1:8443/rest/v1").Result;
if (r.IsSuccessStatusCode)
{
    Log.AddMessage(r.Content.Get<string>());
}
else
{
    Log.AddMessage(string.Format("{0} ({1})", (int)r.StatusCode, r.ReasonPhrase));
}
 
also tried this:
 
var handler = new WebRequestHandler();
handler.ServerCertificateValidationCallback = delegate { return true; };
var c = new HttpClient(handler);
...
 
and this
 
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
 
but each time I've got an exception:
 
InnerException: System.Net.Http.HttpRequestException
   _HResult=-2146233088
   _message=An error occurred while sending the request.
   HResult=-2146233088
   IsTransient=false
   Message=An error occurred while sending the request.
   InnerException: System.Net.WebException
        _HResult=-2146233079
        _message=The request was aborted: Could not create SSL/TLS secure channel.
        HResult=-2146233079
        IsTransient=false
        Message=The request was aborted: Could not create SSL/TLS secure channel.
        Source=System
        StackTrace:
             at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
             at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
        InnerException: 
 
What do I do wrong? Why I can't connect to this server (which has invalid-self-signed certificate)

原文：https://stackoverflow.com/questions/32994464