StarEncryption.hxx
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1 /* -*- Mode: C++; c-default-style: "k&r"; indent-tabs-mode: nil; tab-width: 2; c-basic-offset: 2 -*- */
2
3 /* libstaroffice
4 * Version: MPL 2.0 / LGPLv2+
5 *
6 * The contents of this file are subject to the Mozilla Public License Version
7 * 2.0 (the "License"); you may not use this file except in compliance with
8 * the License or as specified alternatively below. You may obtain a copy of
9 * the License at http://www.mozilla.org/MPL/
10 *
11 * Software distributed under the License is distributed on an "AS IS" basis,
12 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 * for the specific language governing rights and limitations under the
14 * License.
15 *
16 * Major Contributor(s):
17 * Copyright (C) 2002 William Lachance (wrlach@gmail.com)
18 * Copyright (C) 2002,2004 Marc Maurer (uwog@uwog.net)
19 * Copyright (C) 2004-2006 Fridrich Strba (fridrich.strba@bluewin.ch)
20 * Copyright (C) 2006, 2007 Andrew Ziem
21 * Copyright (C) 2011, 2012 Alonso Laurent (alonso@loria.fr)
22 *
23 *
24 * All Rights Reserved.
25 *
26 * For minor contributions see the git repository.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
30 * in which case the provisions of the LGPLv2+ are applicable
31 * instead of those above.
32 */
33
34 /*
35 * StarEncryption to read/parse some basic encryption in StarOffice documents
36 *
37 */
38 #ifndef STAR_ENCRYPTION
39 # define STAR_ENCRYPTION
40
41 #include <vector>
42
43 #include "libstaroffice_internal.hxx"
44 #include "STOFFDebug.hxx"
45
51 class StarEncryption
52 {
53 public:
55 StarEncryption();
57 explicit StarEncryption(std::string const &password);
59 virtual ~StarEncryption();
60
62 bool decode(std::vector<uint8_t> &data) const
63 {
64 return decode(data, m_password);
65 }
67 bool checkPassword(uint32_t date, uint32_t time, std::vector<uint8_t> const &cryptDateTime) const;
88 bool guessPassword(uint32_t date, uint32_t time, std::vector<uint8_t> const &cryptDateTime);
89
91 static STOFFInputStreamPtr decodeStream(STOFFInputStreamPtr input, uint8_t mask);
102 static uint8_t getMaskToDecodeStream(uint8_t src, uint8_t dest);
103 protected:
105 static bool decode(std::vector<uint8_t> &data, std::vector<uint8_t> const &cryptPasswd);
113 static bool findEncryptedPassword(std::vector<uint8_t> const &src, std::vector<uint8_t> const &dest, uint8_t c0c1, std::vector<uint8_t> &crypter);
115 std::vector<uint8_t> m_password;
116 };
117 #endif
118 // vim: set filetype=cpp tabstop=2 shiftwidth=2 cindent autoindent smartindent noexpandtab:
StarEncryption::findEncryptedPassword
static bool findEncryptedPassword(std::vector< uint8_t > const &src, std::vector< uint8_t > const &dest, uint8_t c0c1, std::vector< uint8_t > &crypter)
try to find the crypter knowing the original data(16 bytes), the final data(16 bytes) and the value o...
Definition: StarEncryption.cxx:173
STOFF_DEBUG_MSG
#define STOFF_DEBUG_MSG(M)
Definition: libstaroffice_internal.hxx:129
StarEncryption::decode
bool decode(std::vector< uint8_t > &data) const
decodes a string
Definition: StarEncryption.hxx:62
StarEncryption::m_password
std::vector< uint8_t > m_password
the crypted password
Definition: StarEncryption.hxx:115
StarEncryption::StarEncryption
StarEncryption()
constructor
Definition: StarEncryption.cxx:49
StarEncryption
the main class to read/.
Definition: StarEncryption.hxx:51
StarEncryption::checkPassword
bool checkPassword(uint32_t date, uint32_t time, std::vector< uint8_t > const &cryptDateTime) const
checks that the password is correct
Definition: StarEncryption.cxx:101
StarEncryption.hxx
libstaroffice_internal.hxx
StarEncryption::decodeStream
static STOFFInputStreamPtr decodeStream(STOFFInputStreamPtr input, uint8_t mask)
decode a zone given a mask
Definition: StarEncryption.cxx:192
StarEncryption::guessPassword
bool guessPassword(uint32_t date, uint32_t time, std::vector< uint8_t > const &cryptDateTime)
tries to guess the password, assuming that the user's password has at most 15 characters.
Definition: StarEncryption.cxx:119
StarEncryption::~StarEncryption
virtual ~StarEncryption()
destructor
Definition: StarEncryption.cxx:70
STOFFInputStreamPtr
std::shared_ptr< STOFFInputStream > STOFFInputStreamPtr
a smart pointer of STOFFInputStream
Definition: libstaroffice_internal.hxx:489
STOFFStringStream.hxx
STOFFDebug.hxx
STOFFInputStream
Internal class used to read the file stream Internal class used to read the file stream,...
Definition: STOFFInputStream.hxx:53
StarEncryption::getMaskToDecodeStream
static uint8_t getMaskToDecodeStream(uint8_t src, uint8_t dest)
retrieves a mask needed to decode a stream knowing a src and dest bytes
Definition: StarEncryption.cxx:216
STOFFStringStream
internal class used to create a RVNGInputStream from a unsigned char's pointer
Definition: STOFFStringStream.hxx:36