Opc.Ua.Win32.GetLastError C# (CSharp) Method

        public static Exception GetLastError(uint code, string format, params object[] args)
        {
            int error = Win32.GetLastError();

            if (format == null)
            {
                format = String.Empty;
            }

            object[] args2 = args;

            if (args != null && args.Length > 0)
            {
                format += Utils.Format(" (GetLastError = {{{0:X8}}})", args.Length);
                args2 = new object[args.Length + 1];
                Array.Copy(args, args2, args.Length);
                args2[args2.Length - 1] = error;
            }
            else
            {
                format += " (GetLastError = {0:X8})";
                args2 = new object[] { error };
            }

            return ServiceResultException.Create(code, format, args2);
        }

        /// <summary>
        /// Returns true the certificate is in the CRL.
        /// </summary>
        public bool IsRevoked(X509Certificate2 certificate)
        {
            IntPtr pData1      = IntPtr.Zero;
            IntPtr pData2      = IntPtr.Zero;
            int    dwDataSize1 = 0;

            try
            {
                // check that the issuer matches.
                if (m_issuer == null || !Utils.CompareDistinguishedName(certificate.Issuer, m_issuer.Subject))
                {
                    throw new ServiceResultException(StatusCodes.BadCertificateInvalid, "Certificate was not created by the CRL issuer.");
                }

                // get the cert info for the target certificate.
                Win32.CERT_CONTEXT context = (Win32.CERT_CONTEXT)Marshal.PtrToStructure(certificate.Handle, typeof(Win32.CERT_CONTEXT));

                // calculate amount of memory required.
                int bResult = Win32.CryptDecodeObjectEx(
                    Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
                    (IntPtr)Win32.X509_CERT_CRL_TO_BE_SIGNED,
                    m_signedCrl.ToBeSigned.pbData,
                    m_signedCrl.ToBeSigned.cbData,
                    Win32.CRYPT_DECODE_NOCOPY_FLAG,
                    IntPtr.Zero,
                    pData1,
                    ref dwDataSize1);

                if (bResult == 0)
                {
                    throw Win32.GetLastError(StatusCodes.BadDecodingError, "Could not get size for CRL_INFO.");
                }

                // allocate memory.
                pData1 = Marshal.AllocHGlobal(dwDataSize1);

                // decode blob.
                bResult = Win32.CryptDecodeObjectEx(
                    Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
                    (IntPtr)Win32.X509_CERT_CRL_TO_BE_SIGNED,
                    m_signedCrl.ToBeSigned.pbData,
                    m_signedCrl.ToBeSigned.cbData,
                    Win32.CRYPT_DECODE_NOCOPY_FLAG,
                    IntPtr.Zero,
                    pData1,
                    ref dwDataSize1);

                if (bResult == 0)
                {
                    throw Win32.GetLastError(StatusCodes.BadDecodingError, "Could not decode CRL_INFO.");
                }

                IntPtr[] pCRLs = new IntPtr[] { pData1 };
                pData2 = Marshal.AllocHGlobal(IntPtr.Size * pCRLs.Length);
                Marshal.Copy(pCRLs, 0, pData2, pCRLs.Length);

                // check for revocation.
                bResult = Win32.CertVerifyCRLRevocation(
                    Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
                    context.pCertInfo,
                    pCRLs.Length,
                    pData2);

                if (bResult == 0)
                {
                    return(true);
                }

                // not revoked.
                return(false);
            }
            finally
            {
                if (pData1 != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pData1);
                    pData1 = IntPtr.Zero;
                }

                if (pData2 != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pData2);
                    pData2 = IntPtr.Zero;
                }
            }
        }