Microsoft.Protocols.TestSuites.Common.Common.ValidateServerCertificate C# (CSharp) Method

        public static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            SslPolicyErrors errors = sslPolicyErrors;

            if ((errors & SslPolicyErrors.RemoteCertificateNameMismatch) == SslPolicyErrors.RemoteCertificateNameMismatch)
            {
                Zone zone = Zone.CreateFromUrl(((HttpWebRequest)sender).RequestUri.ToString());
                if (zone.SecurityZone == SecurityZone.Intranet || zone.SecurityZone == SecurityZone.MyComputer)
                {
                    errors -= SslPolicyErrors.RemoteCertificateNameMismatch;
                }
            }

            if ((sslPolicyErrors & SslPolicyErrors.RemoteCertificateChainErrors) == SslPolicyErrors.RemoteCertificateChainErrors)
            {
                if (chain != null && chain.ChainStatus != null)
                {
                    foreach (X509ChainStatus status in chain.ChainStatus)
                    {
                        // Self-signed certificates have the issuer in the subject field. 
                        if ((certificate.Subject == certificate.Issuer) && (status.Status == X509ChainStatusFlags.UntrustedRoot))
                        {
                            // Self-signed certificates with an untrusted root are valid. 
                            continue;
                        }
                        else if (status.Status != X509ChainStatusFlags.NoError)
                        {
                            // If there are any other errors in the certificate chain, the certificate is invalid, the method returns false.
                            return false;
                        }
                    }
                }

                // When processing reaches this line, the only errors in the certificate chain are untrusted root errors for self-signed certificates. 
                // These certificates are valid.
                errors -= SslPolicyErrors.RemoteCertificateChainErrors;
            }

            return errors == SslPolicyErrors.None;
        }