/*

dbx_tree: tree database driver for Miranda IM

Copyright 2007-2008 Michael "Protogenes" Kunz,

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#pragma once

#include "Cipher.h"

class HC256 : public CCipher
{
private:	
	uint32_t counter2048;
	uint32_t P[1024], Q[1024];
	uint32_t X[16], Y[16];

	uint32_t BackP[1024], BackQ[1024];
	uint32_t BackX[16], BackY[16];

	void EncryptBlock(uint32_t *Data);
	void CreateTables(uint8_t* Key);

	static const wchar_t* cName;
	static const wchar_t* cDescription;
	static const uint32_t cBlockSizeBytes = 64;
	static const bool     cIsStreamCipher = true;

public:

	const wchar_t * __cdecl Name();
	const wchar_t * __cdecl Description();
	const uint32_t  __cdecl BlockSizeBytes();
	const bool      __cdecl IsStreamCipher();
	
	static const TCipherInfo cCipherInfo;

	HC256();
	~HC256();
	static CCipher::TCipherInterface* __cdecl Create();

	void __cdecl SetKey(void* Key, uint32_t KeyLength);
	void __cdecl Encrypt(void* Data, uint32_t Size, uint32_t Nonce, uint32_t StartByte);
	void __cdecl Decrypt(void* Data, uint32_t Size, uint32_t Nonce, uint32_t StartByte);

};

const wchar_t* HC256::cName          = L"HC-256";
const wchar_t* HC256::cDescription   = L"Streamcipher - 512bit step, very fast, Hongjun Wu 2005";
const TCipherInfo HC256::cCipherInfo = {sizeof(TCipherInfo), 'HC25', cName, cDescription, &HC256::Create};