private byte[] UnprotectPDU(byte[] header, byte[] stub_data, AuthData auth_data)
{
List <SecurityBuffer> buffers = new List <SecurityBuffer>();
buffers.Add(new SecurityBufferInOut(SecurityBufferType.Data | SecurityBufferType.ReadOnly, header));
var stub_data_buffer = new SecurityBufferInOut(SecurityBufferType.Data, stub_data);
buffers.Add(stub_data_buffer);
byte[] signature = auth_data.Data;
auth_data.Data = new byte[0];
MemoryStream stm = new MemoryStream();
BinaryWriter writer = new BinaryWriter(stm);
auth_data.Write(writer, auth_data.Padding);
buffers.Add(new SecurityBufferInOut(SecurityBufferType.Data | SecurityBufferType.ReadOnly, stm.ToArray()));
if (_transport_security.AuthenticationLevel == RpcAuthenticationLevel.PacketIntegrity)
{
if (!_auth_context.VerifySignature(buffers, signature, _recv_sequence_no))
{
throw new RpcTransportException("Invalid response PDU signature.");
}
}
else
{
_auth_context.DecryptMessage(buffers, signature, _recv_sequence_no);
stub_data = stub_data_buffer.ToArray();
}
Array.Resize(ref stub_data, stub_data.Length - auth_data.Padding);
return(stub_data);
}
