/*
 * Copyright (C) Ascensio System SIA, 2009-2026
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation, together with the
 * additional terms provided in the LICENSE file.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
 * details, see the GNU AGPL at: https://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA by email at info@onlyoffice.com
 * or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
 * LV-1050, Latvia, European Union.
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 * The interactive user interfaces in modified versions of the Program
 * are required to display Appropriate Legal Notices in accordance with
 * Section 5 of the GNU AGPL version 3.
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 * All non-code elements of the Product, including illustrations,
 * icon sets, and technical writing content, are licensed under the
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 *
 * This license applies only to such non-code elements and does not
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 * source code, which remains licensed under the GNU Affero General
 * Public License v3.
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 * SPDX-License-Identifier: AGPL-3.0-only
 */
#pragma once

#include "Crypt.h"
#include "../Logic/Biff_structures/RC4EncryptionHeader.h"
#include "BiffDecoder_RCF.h"

namespace CRYPT
{

class RC4Crypt : public Crypt
{
public:
	RC4Crypt(CRYPT::_rc4CryptData & data, std::wstring password);

	virtual void Init(const unsigned long val){}

	virtual void Decrypt(char* data, const size_t size, const unsigned long stream_pos, const size_t block_size);
	virtual void Decrypt(char* data, const size_t size, const unsigned long block_index);

	virtual bool IsVerify();

private:
	void CopyDWORDs2Bytes(const unsigned int b1, const unsigned int b2, const unsigned int b3, const unsigned int b4, unsigned char* byte_array);

	unsigned char pnSalt[16];
	unsigned char pnVerifier[16];
	unsigned char pnVerifierHash[16];

	BiffDecoderRef mxDecoder;
	
	bool m_VerifyPassword;
};


} // namespace CRYPT