barrier/src/lib/synergy/CCryptoStream.h

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2013 Bolton Software Ltd.
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "BasicTypes.h"
#include "CStreamFilter.h"
#include "cryptopp562/gcm.h"
//#include "cryptopp562/modes.h"
#include "cryptopp562/aes.h"
//! Bidirectional encrypted stream
/*!
Encrypts (on write) and decrypts (on read) to and from an underlying stream.
*/
class CCryptoStream : public CStreamFilter {
public:
CCryptoStream(IEventQueue& eventQueue, synergy::IStream* stream, bool adoptStream = true);
virtual ~CCryptoStream();
//! @name manipulators
//@{
//! Read from stream
/*!
Read up to \p n bytes into \p buffer to the stream using encryption.
Returns the number of bytes read by the underlying stream.
*/
virtual UInt32 read(void* out, UInt32 n);
//! Write to stream
/*!
Write \c n bytes from \c buffer to the stream using encryption.
*/
virtual void write(const void* in, UInt32 n);
private:
// TODO: allow user to change between GCM/CTR/CFB
CryptoPP::GCM<CryptoPP::AES>::Encryption m_encryption;
CryptoPP::GCM<CryptoPP::AES>::Decryption m_decryption;
//CryptoPP::CTR_Mode<CryptoPP::AES>::Encryption m_encryption;
//CryptoPP::CTR_Mode<CryptoPP::AES>::Decryption m_decryption;
void logBuffer(const char* name, const byte* buf, int length);
};