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1/****************************************************************************
2** Filename: unzip_p.h
3** Last updated [dd/mm/yyyy]: 28/01/2007
4**
5** pkzip 2.0 decompression.
6**
7** Some of the code has been inspired by other open source projects,
8** (mainly Info-Zip and Gilles Vollant's minizip).
9** Compression and decompression actually uses the zlib library.
10**
11** Copyright (C) 2007 Angius Fabrizio. All rights reserved.
12**
13** This file is part of the OSDaB project (http://osdab.sourceforge.net/).
14**
15** This file may be distributed and/or modified under the terms of the
16** GNU General Public License version 2 as published by the Free Software
17** Foundation and appearing in the file LICENSE.GPL included in the
18** packaging of this file.
19**
20** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
21** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22**
23** See the file LICENSE.GPL that came with this software distribution or
24** visit http://www.gnu.org/copyleft/gpl.html for GPL licensing information.
25**
26**********************************************************************/
27
28//
29// W A R N I N G
30// -------------
31//
32// This file is not part of the Zip/UnZip API. It exists purely as an
33// implementation detail. This header file may change from version to
34// version without notice, or even be removed.
35//
36// We mean it.
37//
38
39#ifndef OSDAB_UNZIP_P__H
40#define OSDAB_UNZIP_P__H
41
42#include "unzip.h"
43#include "zipentry_p.h"
44
45#include <QtGlobal>
46
47// zLib authors suggest using larger buffers (128K or 256K) for (de)compression (especially for inflate())
48// we use a 256K buffer here - if you want to use this code on a pre-iceage mainframe please change it ;)
49#define UNZIP_READ_BUFFER (256*1024)
50
51class UnzipPrivate
52{
53public:
54 UnzipPrivate();
55
56 // Replace this with whatever else you use to store/retrieve the password.
57 QString password;
58
59 bool skipAllEncrypted;
60
61 QMap<QString,ZipEntryP*>* headers;
62
63 QIODevice* device;
64
65 char buffer1[UNZIP_READ_BUFFER];
66 char buffer2[UNZIP_READ_BUFFER];
67
68 unsigned char* uBuffer;
69 const quint32* crcTable;
70
71 // Central Directory (CD) offset
72 quint32 cdOffset;
73 // End of Central Directory (EOCD) offset
74 quint32 eocdOffset;
75
76 // Number of entries in the Central Directory (as to the EOCD record)
77 quint16 cdEntryCount;
78
79 // The number of detected entries that have been skipped because of a non compatible format
80 quint16 unsupportedEntryCount;
81
82 QString comment;
83
84 UnZip::ErrorCode openArchive(QIODevice* device);
85
86 UnZip::ErrorCode seekToCentralDirectory();
87 UnZip::ErrorCode parseCentralDirectoryRecord();
88 UnZip::ErrorCode parseLocalHeaderRecord(const QString& path, ZipEntryP& entry);
89
90 void closeArchive();
91
92 UnZip::ErrorCode extractFile(const QString& path, ZipEntryP& entry, const QDir& dir, UnZip::ExtractionOptions options);
93 UnZip::ErrorCode extractFile(const QString& path, ZipEntryP& entry, QIODevice* device, UnZip::ExtractionOptions options);
94
95 UnZip::ErrorCode testPassword(quint32* keys, const QString& file, const ZipEntryP& header);
96 bool testKeys(const ZipEntryP& header, quint32* keys);
97
98 bool createDirectory(const QString& path);
99
100 inline void decryptBytes(quint32* keys, char* buffer, qint64 read);
101
102 inline quint32 getULong(const unsigned char* data, quint32 offset) const;
103 inline quint64 getULLong(const unsigned char* data, quint32 offset) const;
104 inline quint16 getUShort(const unsigned char* data, quint32 offset) const;
105 inline int decryptByte(quint32 key2) const;
106 inline void updateKeys(quint32* keys, int c) const;
107 inline void initKeys(const QString& pwd, quint32* keys) const;
108
109 inline QDateTime convertDateTime(const unsigned char date[2], const unsigned char time[2]) const;
110};
111
112#endif // OSDAB_UNZIP_P__H