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76ee07f61c
Co-authored-by: Alexander Trofimov <alexander.trofimov@onlyoffice.com> Co-committed-by: Alexander Trofimov <alexander.trofimov@onlyoffice.com>
112 lines
3.7 KiB
C++
112 lines
3.7 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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#ifndef _PDF_WRITER_SRC_ENCRYPT_H
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#define _PDF_WRITER_SRC_ENCRYPT_H
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#include "Utils.h"
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#define ID_LEN 16
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#define PERMISSION_PAD 0xFFFFFFC0
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#define SET_BYTE_FUNC(Name, m_memory) \
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void Name(const BYTE* pSrc, unsigned int unLen)\
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{\
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memcpy(m_memory, pSrc, unLen);\
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}
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#define SET_UN_FUNC(Name, m_memory) \
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void Name(unsigned int unVal)\
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{\
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m_memory = unVal;\
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}
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namespace PdfWriter
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{
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class CEncrypt
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{
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public:
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CEncrypt();
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virtual ~CEncrypt();
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void CreateUserKey();
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void CreateOwnerKey();
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void CreateEncryptionKey();
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void InitKey(unsigned int unObjectId, unsigned short unGenNo);
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void Reset();
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unsigned int CryptBuf(const BYTE* pSrc, BYTE* pDst, unsigned int unLen);
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void SetKeyLength(unsigned int unLen);
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void SetPasswords(const std::string &sUserPassword, const std::string &sOwnerPassword);
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bool MakeFileKey(int nCryptAlgorithm);
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SET_BYTE_FUNC(SetID, m_anEncryptID);
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SET_BYTE_FUNC(SetO, m_anOwnerKey);
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SET_BYTE_FUNC(SetU, m_anUserKey);
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SET_BYTE_FUNC(SetOE, m_anOwnerEncryptKey);
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SET_BYTE_FUNC(SetUE, m_anUserEncryptKey);
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SET_BYTE_FUNC(SetPerms, m_anPermEncrypt);
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SET_UN_FUNC(SetPermission, m_unPermission);
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SET_UN_FUNC(SetRevision, m_unRevision);
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SET_UN_FUNC(SetVersion, m_unVersion);
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private:
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class Impl;
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Impl *impl;
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bool MakeFileKey3(const std::string &sPassword, unsigned char *pHash, int nHashSize, unsigned char *pHash2 = NULL, int nHashSize2 = 0);
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bool MakeFileKey2(BYTE* sUserPassword, int nLength);
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unsigned int m_unKeyLen;
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BYTE m_anOwnerKey[48]; //O
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BYTE m_anUserKey[48]; //U
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BYTE m_anOwnerEncryptKey[32]; //OE
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BYTE m_anUserEncryptKey[32]; //UE
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unsigned int m_unPermission; //P
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BYTE m_anPermEncrypt[16]; //Perm
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unsigned int m_unVersion; //V
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unsigned int m_unRevision; //R
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BYTE m_anEncryptID[ID_LEN];
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unsigned int m_unIDLength;
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friend class CEncryptDict;
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friend class CDocument;
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};
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}
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#endif // _PDF_WRITER_SRC_ENCRYPT_H
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