Opc.Ua.Configuration.ApplicationInstance.CheckDomainsInCertificate C# (CSharp) Method

        private static bool CheckDomainsInCertificate(
            ApplicationConfiguration configuration,
            X509Certificate2 certificate,
            bool silent)
        {
            Utils.Trace(Utils.TraceMasks.Information, "Checking domains in certificate. {0}", certificate.Subject);

            bool valid = true;
            IList<string> serverDomainNames = configuration.GetServerDomainNames();
            IList<string> certificateDomainNames = Utils.GetDomainsFromCertficate(certificate);

            // get computer name.
            string computerName = System.Net.Dns.GetHostName();

            // get DNS aliases and IP addresses.
            System.Net.IPHostEntry entry = System.Net.Dns.GetHostEntry(computerName);

            for (int ii = 0; ii < serverDomainNames.Count; ii++)
            {
                if (Utils.FindStringIgnoreCase(certificateDomainNames, serverDomainNames[ii]))
                {
                    continue;
                }

                if (String.Compare(serverDomainNames[ii], "localhost", StringComparison.OrdinalIgnoreCase) == 0)
                {
                    if (Utils.FindStringIgnoreCase(certificateDomainNames, computerName))
                    {
                        continue;
                    }

                    // check for aliases.
                    bool found = false;

                    for (int jj = 0; jj < entry.Aliases.Length; jj++)
                    {
                        if (Utils.FindStringIgnoreCase(certificateDomainNames, entry.Aliases[jj]))
                        {
                            found = true;
                            break;
                        }
                    }

                    if (found)
                    {
                        continue;
                    }

                    // check for ip addresses.
                    for (int jj = 0; jj < entry.AddressList.Length; jj++)
                    {
                        if (Utils.FindStringIgnoreCase(certificateDomainNames, entry.AddressList[jj].ToString()))
                        {
                            found = true;
                            break;
                        }
                    }

                    if (found)
                    {
                        continue;
                    }
                }

                string message = Utils.Format(
                    "The server is configured to use domain '{0}' which does not appear in the certificate. Update certificate?",
                    serverDomainNames[ii]);

                valid = false;

                if (!silent)
                {
                    if (MessageBox.Show(message, configuration.ApplicationName, MessageBoxButtons.YesNo, MessageBoxIcon.Warning) != DialogResult.Yes)
                    {
                        valid = true;
                        continue;
                    }
                }

                Utils.Trace(message);
                break;
            }

            return valid;
        }