Https Certificate Validation

Question

Hi All,
We have a WPF application built on .Net Framework 4.7 which acts as an HTTPS client. We are currently trying to use JSON-RPC to connect to the server to download the files.
We are currently not validating the HTTPS certificate. But now we need to validate the certificate to verify the authenticity.

Can anyone please let us know as to how we can validate the certificate and what parameters are to be checked for validation.

Any help would be appreciated!!
Thank you!

Answer 1

@S Abijith , after you installed the certificate in the website, you could try to use HttpWebRequest.ServerCertificateValidationCallback Property to set a callback function to validate the server certificate.

Here is a code example you could refer to.

 static void Main(string[] args)  
            {  
                HttpWebRequest request = WebRequest.CreateHttp("url");  
                request.ServerCertificateValidationCallback += ValidateServerCertificate;  
            }  
      
      
            public static bool ValidateServerCertificate(  
      object sender,  
      X509Certificate certificate,  
      X509Chain chain,  
      SslPolicyErrors sslPolicyErrors)  
        {  
            if (sslPolicyErrors == SslPolicyErrors.None)  
            {  
                Console.WriteLine("Certificate is valid");  
                return true;  
               
            }  
            else  
            {  
                Console.WriteLine("Certificate error: {0}", sslPolicyErrors);  
  
                // Do not allow this client to communicate with unauthenticated servers.  
                return false;  
            }  
        }  

Best Regards,
Jack

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