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76ee07f61c
Co-authored-by: Alexander Trofimov <alexander.trofimov@onlyoffice.com> Co-committed-by: Alexander Trofimov <alexander.trofimov@onlyoffice.com>
120 lines
4.5 KiB
C++
120 lines
4.5 KiB
C++
/*
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* Copyright (C) Ascensio System SIA, 2009-2026
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation, together with the
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* additional terms provided in the LICENSE file.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: https://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA by email at info@onlyoffice.com
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* or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
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* LV-1050, Latvia, European Union.
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*
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* The interactive user interfaces in modified versions of the Program
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* are required to display Appropriate Legal Notices in accordance with
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* Section 5 of the GNU AGPL version 3.
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*
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* No trademark rights are granted under this License.
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*
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* All non-code elements of the Product, including illustrations,
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* icon sets, and technical writing content, are licensed under the
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* Creative Commons Attribution-ShareAlike 4.0 International License:
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* https://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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* This license applies only to such non-code elements and does not
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* modify or replace the licensing terms applicable to the Program's
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* source code, which remains licensed under the GNU Affero General
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* Public License v3.
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*
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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#include "RC4Crypt.h"
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#include <boost/scoped_array.hpp>
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namespace CRYPT
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{
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RC4Crypt::RC4Crypt(CRYPT::_rc4CryptData & data, std::wstring password)
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{
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m_VerifyPassword = false;
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CopyDWORDs2Bytes(data.Salt.b1, data.Salt.b2, data.Salt.b3, data.Salt.b4, pnSalt);
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CopyDWORDs2Bytes(data.EncryptedVerifier.b1 , data.EncryptedVerifier.b2, data.EncryptedVerifier.b3, data.EncryptedVerifier.b4, pnVerifier);
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CopyDWORDs2Bytes(data.EncryptedVerifierHash.b1, data.EncryptedVerifierHash.b2, data.EncryptedVerifierHash.b3, data.EncryptedVerifierHash.b4, pnVerifierHash);
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mxDecoder.reset(new BiffDecoder_RCF(pnSalt, pnVerifier, pnVerifierHash));
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m_VerifyPassword = mxDecoder->verifyPassword(password);
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}
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bool RC4Crypt::IsVerify()
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{
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return m_VerifyPassword;
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}
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void RC4Crypt::CopyDWORDs2Bytes(const unsigned int b1, const unsigned int b2, const unsigned int b3, const unsigned int b4, unsigned char* byte_array)
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{
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byte_array[0] = static_cast<unsigned char>((b1 & 0x000000ff) >> 0);
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byte_array[1] = static_cast<unsigned char>((b1 & 0x0000ff00) >> 8);
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byte_array[2] = static_cast<unsigned char>((b1 & 0x00ff0000) >> 16);
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byte_array[3] = static_cast<unsigned char>((b1 & 0xff000000) >> 24);
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byte_array[4] = static_cast<unsigned char>((b2 & 0x000000ff) >> 0);
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byte_array[5] = static_cast<unsigned char>((b2 & 0x0000ff00) >> 8);
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byte_array[6] = static_cast<unsigned char>((b2 & 0x00ff0000) >> 16);
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byte_array[7] = static_cast<unsigned char>((b2 & 0xff000000) >> 24);
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byte_array[8] = static_cast<unsigned char>((b3 & 0x000000ff) >> 0);
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byte_array[9] = static_cast<unsigned char>((b3 & 0x0000ff00) >> 8);
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byte_array[10] = static_cast<unsigned char>((b3 & 0x00ff0000) >> 16);
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byte_array[11] = static_cast<unsigned char>((b3 & 0xff000000) >> 24);
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byte_array[12] = static_cast<unsigned char>((b4 & 0x000000ff) >> 0);
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byte_array[13] = static_cast<unsigned char>((b4 & 0x0000ff00) >> 8);
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byte_array[14] = static_cast<unsigned char>((b4 & 0x00ff0000) >> 16);
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byte_array[15] = static_cast<unsigned char>((b4 & 0xff000000) >> 24);
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}
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void RC4Crypt::Decrypt(char* data, const size_t size, const unsigned long block_index)
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{
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if(size <= 256)
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{
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static unsigned char quick_buf[256];
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mxDecoder->decode( quick_buf, reinterpret_cast<unsigned char*>(data), size, block_index );
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memcpy(data, quick_buf, size);
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}
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else
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{
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boost::scoped_array<unsigned char> out_data(new unsigned char[size]);
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mxDecoder->decode( out_data.get(), reinterpret_cast<unsigned char*>(data), size, block_index );
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memcpy(data, out_data.get(), size);
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}
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}
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void RC4Crypt::Decrypt(char* data, const size_t size, const unsigned long stream_pos, const size_t block_size)
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{
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if(size <= 256)
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{
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static unsigned char quick_buf[256];
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mxDecoder->decode( quick_buf, reinterpret_cast<unsigned char*>(data), size, stream_pos, block_size );
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memcpy(data, quick_buf, size);
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}
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else
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{
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boost::scoped_array<unsigned char> out_data(new unsigned char[size]);
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mxDecoder->decode( out_data.get(), reinterpret_cast<unsigned char*>(data), size, stream_pos, block_size );
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memcpy(data, out_data.get(), size);
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}
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}
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};
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