mirror of
https://github.com/ONLYOFFICE/core.git
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98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2016
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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. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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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: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
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* EU, LV-1021.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#include "EncryptionHeader.h"
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#define GETBIT(from, num) ((from & (1 << num)) != 0)
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namespace DocFileFormat
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{
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EncryptionHeader::EncryptionHeader( FileInformationBlock* fib, POLE::Stream* tableStream )
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{
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VirtualStreamReader tStream( tableStream, 0, fib->m_bOlderVersion);
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if (fib->m_FibBase.fObfuscation)
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{
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//xor
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return;
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}
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unsigned short vMajor = tStream.ReadUInt16();
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unsigned short vMinor = tStream.ReadUInt16();
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if(0x0001 == vMajor) // RC4 encryption header structure
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{// fib->m_FibBase.lKey == 52
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crypt_data.Salt.b1 = tStream.ReadUInt32();
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crypt_data.Salt.b2 = tStream.ReadUInt32();
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crypt_data.Salt.b3 = tStream.ReadUInt32();
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crypt_data.Salt.b4 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifier.b1 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifier.b2 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifier.b3 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifier.b4 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifierHash.b1 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifierHash.b2 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifierHash.b3 = tStream.ReadUInt32();
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crypt_data.EncryptedVerifierHash.b4 = tStream.ReadUInt32();
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}
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else
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{
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// unsigned short flags = tStream.ReadUInt16();
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// bool fCryptoAPI = GETBIT(flags, 2);
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// bool fDocProps = GETBIT(flags, 3);
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// bool fExternal = GETBIT(flags, 4);
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// bool fAES = GETBIT(flags, 5);
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// _UINT32 EncryptionHeaderSize = tStream.ReadUInt32();
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////header
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//
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// tStream.ReadUInt32(); // reserved (SizeExtra)
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// _INT32 AlgID = tStream.ReadInt32();
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// _INT32 AlgIDHash = tStream.ReadInt32();
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// _UINT32 KeySize = tStream.ReadUInt32();
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// _UINT32 ProviderType = tStream.ReadUInt32();
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// tStream.ReadUInt32();
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// tStream.ReadUInt32(); // reserved
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//
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// //std::wstring CSPName;
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// //record >> CSPName;
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//// + crypt_data
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}
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//RELEASEARRAYOBJECTS( bytes );
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}
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}
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