Opc.Ua.CertificateIdentifier.CreateBlob C# (CSharp) Method

        public static byte[] CreateBlob(IList<X509Certificate2> certificates)
        {
            if (certificates == null || certificates.Count == 0)
            {
                throw new CryptographicException("Primary certificate has not been provided.");
            }

            // copy the primary certificate.
            X509Certificate2 certificate = certificates[0];
            byte[] blobData = certificate.RawData;

            // check for any supporting certificates.
            if (certificates.Count > 1)
            {
                List<byte[]> additionalData = new List<byte[]>(certificates.Count - 1);
                int length = blobData.Length;

                for (int ii = 1; ii < certificates.Count; ii++)
                {
                    byte[] bytes = certificates[ii].RawData;
                    length += bytes.Length;
                    additionalData.Add(bytes);
                }

                // append the supporting certificates to the raw data.
                byte[] rawData = new byte[length];
                Array.Copy(blobData, rawData, blobData.Length);

                length = blobData.Length;

                for (int ii = 0; ii < additionalData.Count; ii++)
                {
                    byte[] bytes = additionalData[ii];
                    Array.Copy(bytes, 0, rawData, length, bytes.Length);
                    length += bytes.Length;
                }

                blobData = rawData;
            }

            return blobData;
        }