1 /****************************************************************************
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2 ** Filename: unzip_p.h
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3 ** Last updated [dd/mm/yyyy]: 28/01/2007
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5 ** pkzip 2.0 decompression.
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7 ** Some of the code has been inspired by other open source projects,
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8 ** (mainly Info-Zip and Gilles Vollant's minizip).
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9 ** Compression and decompression actually uses the zlib library.
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11 ** Copyright (C) 2007-2008 Angius Fabrizio. All rights reserved.
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13 ** This file is part of the OSDaB project (http://osdab.sourceforge.net/).
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15 ** This file may be distributed and/or modified under the terms of the
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16 ** GNU General Public License version 2 as published by the Free Software
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17 ** Foundation and appearing in the file LICENSE.GPL included in the
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18 ** packaging of this file.
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20 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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21 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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23 ** See the file LICENSE.GPL that came with this software distribution or
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24 ** visit http://www.gnu.org/copyleft/gpl.html for GPL licensing information.
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26 **********************************************************************/
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32 // This file is not part of the Zip/UnZip API. It exists purely as an
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33 // implementation detail. This header file may change from version to
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34 // version without notice, or even be removed.
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39 #ifndef OSDAB_UNZIP_P__H
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40 #define OSDAB_UNZIP_P__H
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43 #include "zipentry_p.h"
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47 // zLib authors suggest using larger buffers (128K or 256K) for (de)compression (especially for inflate())
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48 // we use a 256K buffer here - if you want to use this code on a pre-iceage mainframe please change it ;)
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49 #define UNZIP_READ_BUFFER (256*1024)
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56 // Replace this with whatever else you use to store/retrieve the password.
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59 bool skipAllEncrypted;
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61 QMap<QString,ZipEntryP*>* headers;
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65 char buffer1[UNZIP_READ_BUFFER];
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66 char buffer2[UNZIP_READ_BUFFER];
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68 unsigned char* uBuffer;
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69 const quint32* crcTable;
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71 // Central Directory (CD) offset
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73 // End of Central Directory (EOCD) offset
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76 // Number of entries in the Central Directory (as to the EOCD record)
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77 quint16 cdEntryCount;
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79 // The number of detected entries that have been skipped because of a non compatible format
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80 quint16 unsupportedEntryCount;
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84 UnZip::ErrorCode openArchive(QIODevice* device);
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86 UnZip::ErrorCode seekToCentralDirectory();
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87 UnZip::ErrorCode parseCentralDirectoryRecord();
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88 UnZip::ErrorCode parseLocalHeaderRecord(const QString& path, ZipEntryP& entry);
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90 void closeArchive();
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92 UnZip::ErrorCode extractFile(const QString& path, ZipEntryP& entry, const QDir& dir, UnZip::ExtractionOptions options);
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93 UnZip::ErrorCode extractFile(const QString& path, ZipEntryP& entry, QIODevice* device, UnZip::ExtractionOptions options);
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95 UnZip::ErrorCode testPassword(quint32* keys, const QString& file, const ZipEntryP& header);
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96 bool testKeys(const ZipEntryP& header, quint32* keys);
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98 bool createDirectory(const QString& path);
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100 inline void decryptBytes(quint32* keys, char* buffer, qint64 read);
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102 inline quint32 getULong(const unsigned char* data, quint32 offset) const;
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103 inline quint64 getULLong(const unsigned char* data, quint32 offset) const;
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104 inline quint16 getUShort(const unsigned char* data, quint32 offset) const;
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105 inline int decryptByte(quint32 key2) const;
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106 inline void updateKeys(quint32* keys, int c) const;
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107 inline void initKeys(const QString& pwd, quint32* keys) const;
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109 inline QDateTime convertDateTime(const unsigned char date[2], const unsigned char time[2]) const;
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112 #endif // OSDAB_UNZIP_P__H
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