Opc.Ua.DirectoryCertificateStore.IsRevoked C# (CSharp) Метод

        public StatusCode IsRevoked(X509Certificate2 issuer, X509Certificate2 certificate)
        {
            if (issuer == null)
            {
                throw new ArgumentNullException("issuer");
            }

            if (certificate == null)
            {
                throw new ArgumentNullException("certificate");
            }

            // check for CRL.
            DirectoryInfo info = new DirectoryInfo(this.Directory.FullName + Path.DirectorySeparatorChar + "crl");

            if (info.Exists)
            {
                bool crlExpired = true;

                foreach (FileInfo file in info.GetFiles("*.crl"))
                {
                    X509CRL crl = null;

                    try
                    {
                        crl = new X509CRL(file.FullName);
                    }
                    catch (Exception e)
                    {
                        Utils.Trace(e, "Could not parse CRL file.");
                        continue;
                    }

                    if (!Utils.CompareDistinguishedName(crl.Issuer, issuer.Subject))
                    {
                        continue;
                    }

                    if (!crl.VerifySignature(issuer, false))
                    {
                        continue;
                    }

                    if (crl.IsRevoked(certificate))
                    {
                        return StatusCodes.BadCertificateRevoked;
                    }

                    if (crl.UpdateTime <= DateTime.UtcNow && (crl.NextUpdateTime == DateTime.MinValue || crl.NextUpdateTime >= DateTime.UtcNow))
                    {
                        crlExpired = false;
                    }
                }

                // certificate is fine.
                if (!crlExpired)
                {
                    return StatusCodes.Good;
                }
            }

            // can't find a valid CRL.
            return StatusCodes.BadCertificateRevocationUnknown;
        }