rbutil/rbutilqt/zip/unzip_p.h

   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
  51 class UnzipPrivate
  52 {
  53 public:
  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