StarEncryption.hxx
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00001 /* -*- Mode: C++; c-default-style: "k&r"; indent-tabs-mode: nil; tab-width: 2; c-basic-offset: 2 -*- */
00002 
00003 /* libstaroffice
00004 * Version: MPL 2.0 / LGPLv2+
00005 *
00006 * The contents of this file are subject to the Mozilla Public License Version
00007 * 2.0 (the "License"); you may not use this file except in compliance with
00008 * the License or as specified alternatively below. You may obtain a copy of
00009 * the License at http://www.mozilla.org/MPL/
00010 *
00011 * Software distributed under the License is distributed on an "AS IS" basis,
00012 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013 * for the specific language governing rights and limitations under the
00014 * License.
00015 *
00016 * Major Contributor(s):
00017 * Copyright (C) 2002 William Lachance (wrlach@gmail.com)
00018 * Copyright (C) 2002,2004 Marc Maurer (uwog@uwog.net)
00019 * Copyright (C) 2004-2006 Fridrich Strba (fridrich.strba@bluewin.ch)
00020 * Copyright (C) 2006, 2007 Andrew Ziem
00021 * Copyright (C) 2011, 2012 Alonso Laurent (alonso@loria.fr)
00022 *
00023 *
00024 * All Rights Reserved.
00025 *
00026 * For minor contributions see the git repository.
00027 *
00028 * Alternatively, the contents of this file may be used under the terms of
00029 * the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
00030 * in which case the provisions of the LGPLv2+ are applicable
00031 * instead of those above.
00032 */
00033 
00034 /*
00035  * StarEncryption to read/parse some basic encryption in StarOffice documents
00036  *
00037  */
00038 #ifndef STAR_ENCRYPTION
00039 #  define STAR_ENCRYPTION
00040 
00041 #include <vector>
00042 
00043 #include "libstaroffice_internal.hxx"
00044 #include "STOFFDebug.hxx"
00045 
00051 class StarEncryption
00052 {
00053 public:
00055   StarEncryption();
00057   explicit StarEncryption(std::string const &password);
00059   virtual ~StarEncryption();
00060 
00062   bool decode(std::vector<uint8_t> &data) const
00063   {
00064     return decode(data, m_password);
00065   }
00067   bool checkPassword(uint32_t date, uint32_t time, std::vector<uint8_t> const &cryptDateTime) const;
00088   bool guessPassword(uint32_t date, uint32_t time, std::vector<uint8_t> const &cryptDateTime);
00089 
00091   static STOFFInputStreamPtr decodeStream(STOFFInputStreamPtr input, uint8_t mask);
00102   static uint8_t getMaskToDecodeStream(uint8_t src, uint8_t dest);
00103 protected:
00105   static bool decode(std::vector<uint8_t> &data, std::vector<uint8_t> const &cryptPasswd);
00113   static bool findEncryptedPassword(std::vector<uint8_t> const &src, std::vector<uint8_t> const &dest, uint8_t c0c1, std::vector<uint8_t> &crypter);
00115   std::vector<uint8_t> m_password;
00116 };
00117 #endif
00118 // vim: set filetype=cpp tabstop=2 shiftwidth=2 cindent autoindent smartindent noexpandtab: