SSL证书身份验证和C＃

Question

我有一份包含此信息的证书：

  

该证书用于以下目的：
    -向远程计算机证明您的身份
    -确保远程计算机的身份

该证书已经安装在我的服务器上，我必须使用它来调用Soap Web服务。
但是当我尝试调用此Web服务时，出现此错误：

  

基础连接已关闭：发生意外错误   接收。

有人告诉我"certifcate exchnage is not happening from my end"
是什么意思？

服务器配置

• IIS 8.5

• Windows Server 2012 r2

  IDE visual studio 2017

  public partial class Form1 : Form
      {
  
          Back2uSubscribeManageService client = null;
          string certName = string.Empty;
          RemoteCertificateValidationCallback 
          chainedServerCertValidationCallback = null;
  
  
   public Form1()
          {
              InitializeComponent();
              chainedServerCertValidationCallback = 
              ServicePointManager.ServerCertificateValidationCallback;
              ServicePointManager.ServerCertificateValidationCallback = new 
          RemoteCertificateValidationCallback(OnValidateServerCertificate);
  
          }
  
  //below the method where I call a method of the web service
  
  private void button1_Click(object sender, EventArgs e)
  {
  
  X509Store computerCaStore = new X509Store(StoreName.My, 
           StoreLocation.LocalMachine);
      computerCaStore.Open(OpenFlags.ReadOnly);
      X509Certificate2Collection certificatesInStore = 
      computerCaStore.Certificates;
      X509Certificate2Collection findResult = 
     certificatesInStore.Find(X509FindType.FindBySubjectName,"*.mydomain.com", false);
              X509Certificate cert;
              cert = findResult[0];
  
  client = new Back2uSubscribeManageService();
  client.ClientCertificates.Add(cert);
  client.Url = url;
  var result = client.subscribeProduct(request);
  }
  }
  //below is the callback method for server certificate validation.
  
   bool OnValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
          {
  
              X509Store computerCaStore = new X509Store(StoreName.Root, 
                 StoreLocation.LocalMachine);
              X509Certificate2Collection certificatesInStore = 
                computerCaStore.Certificates;
              X509Certificate2Collection findResult = 
  
    certificatesInStore.Find(X509FindType.FindByIssuerName,"xxxxx", false);
              X509Certificate cert;
              cert = findResult[0];
  
             bool valid = true;
             if (valid)
              {
                  if (chainedServerCertValidationCallback == null)
                  {
                      bool validationResult = 
                          certificate.Issuer.Equals(cert.Issuer);
                      return validationResult;
                  }
                  else
                  {
                      return chainedServerCertValidationCallback(sender, 
                     certificate, chain, sslPolicyErrors);
                  }
              }
              return false;
          }
      }
  

我希望有消息告诉我订阅成功，但是我收到错误消息：

  

基础连接已关闭：发生意外错误   接收。