Exemplo n.º 1
0
        public IntPtr pBuffers; //Point to SecBuffer

        public SecBufferDesc(int bufferSize)
        {
            ulVersion = (int)SecBufferType.SECBUFFER_VERSION;
            cBuffers  = 1;
            SecBuffer ThisSecBuffer = new SecBuffer(bufferSize);

            pBuffers = Marshal.AllocHGlobal(Marshal.SizeOf(ThisSecBuffer));
            Marshal.StructureToPtr(ThisSecBuffer, pBuffers, false);
        }
Exemplo n.º 2
0
        public byte[] GetSecBufferByteArray()
        {
            byte[] Buffer = null;

            if (pBuffers == IntPtr.Zero)
            {
                throw new InvalidOperationException("Object has already been disposed!!!");
            }

            if (cBuffers == 1)
            {
                SecBuffer ThisSecBuffer = (SecBuffer)Marshal.PtrToStructure(pBuffers, typeof(SecBuffer));

                if (ThisSecBuffer.cbBuffer > 0)
                {
                    Buffer = new byte[ThisSecBuffer.cbBuffer];
                    Marshal.Copy(ThisSecBuffer.pvBuffer, Buffer, 0, ThisSecBuffer.cbBuffer);
                }
            }
            else
            {
                int BytesToAllocate = 0;

                for (int Index = 0; Index < cBuffers; Index++)
                {
                    //The bits were written out the following order:
                    //int cbBuffer;
                    //int BufferType;
                    //pvBuffer;
                    //What we need to do here calculate the total number of bytes we need to copy...
                    int CurrentOffset = Index * Marshal.SizeOf(typeof(SecBuffer));
                    BytesToAllocate += Marshal.ReadInt32(pBuffers, CurrentOffset);
                }

                Buffer = new byte[BytesToAllocate];

                for (int Index = 0, BufferIndex = 0; Index < cBuffers; Index++)
                {
                    //The bits were written out the following order:
                    //int cbBuffer;
                    //int BufferType;
                    //pvBuffer;
                    //Now iterate over the individual buffers and put them together into a
                    //byte array...
                    int    CurrentOffset     = Index * Marshal.SizeOf(typeof(SecBuffer));
                    int    BytesToCopy       = Marshal.ReadInt32(pBuffers, CurrentOffset);
                    IntPtr SecBufferpvBuffer = Marshal.ReadIntPtr(pBuffers, CurrentOffset + Marshal.SizeOf(typeof(int)) + Marshal.SizeOf(typeof(int)));
                    Marshal.Copy(SecBufferpvBuffer, Buffer, BufferIndex, BytesToCopy);
                    BufferIndex += BytesToCopy;
                }
            }

            return(Buffer);
        }