System.Net.SSPIWrapper.EncryptMessage C# (CSharp) Method

        public static int EncryptMessage(SSPIInterface secModule, SafeDeleteContext context, SecurityBuffer[] input, uint sequenceNumber)
        {
            return EncryptDecryptHelper(OP.Encrypt, secModule, context, input, sequenceNumber);
        }

        public static SecurityStatusPal EncryptMessage(SafeDeleteContext securityContext, byte[] writeBuffer, int size, int headerSize, int trailerSize, out int resultSize)
        {
            // Encryption using SCHANNEL requires 4 buffers: header, payload, trailer, empty.
            SecurityBuffer[] securityBuffer = new SecurityBuffer[4];

            securityBuffer[0] = new SecurityBuffer(writeBuffer, 0, headerSize, SecurityBufferType.Header);
            securityBuffer[1] = new SecurityBuffer(writeBuffer, headerSize, size, SecurityBufferType.Data);
            securityBuffer[2] = new SecurityBuffer(writeBuffer, headerSize + size, trailerSize, SecurityBufferType.Trailer);
            securityBuffer[3] = new SecurityBuffer(null, SecurityBufferType.Empty);

            int errorCode = SSPIWrapper.EncryptMessage(GlobalSSPI.SSPISecureChannel, securityContext, securityBuffer, 0);

            if (errorCode != 0)
            {
                if (GlobalLog.IsEnabled)
                {
                    GlobalLog.Print("SslStreamPal.Windows: SecureChannel#" + LoggingHash.HashString(securityContext) + "::Encrypt ERROR" + errorCode.ToString("x"));
                }
                resultSize = 0;
            }
            else
            {
                // The full buffer may not be used.
                resultSize = securityBuffer[0].size + securityBuffer[1].size + securityBuffer[2].size;
            }

            return(GetSecurityStatusPalFromWin32Int(errorCode));
        }