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kzip.cpp /* This file is part of the KDE libraries Copyright (C) 2000 David Faure <faure@kde.org> Copyright (C) 2002 Holger Schroeder <holger-kde@holgis.net> This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License version 2 as published by the Free Software Foundation. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* This class implements a kioslave to access ZIP files from KDE. you can use it in IO_ReadOnly or in IO_WriteOnly mode, and it behaves just as expected (i hope ;-) ). It can also be used in IO_ReadWrite mode, in this case one can append files to an existing zip archive. when you append new files, which are not yet in the zip, it works as expected, they are appended at the end. when you append a file, which is already in the file, the reference to the old file is dropped and the new one is added to the zip. but the old data from the file itself is not deleted, it is still in the zipfile. so when you want to have a small and garbagefree zipfile, just read the contents of the appended zipfile and write it to a new one in IO_WriteOnly mode. especially take care of this, when you don't want to leak information of how intermediate versions of files in the zip were looking. For more information on the zip fileformat go to http://www.pkware.com/support/appnote.html . */ #include "kzip.h" #include "kfilterdev.h" #include "klimitediodevice.h" #include <kmimetype.h> #include <ksavefile.h> #include <kdebug.h> #include <qasciidict.h> #include <qfile.h> #include <qdir.h> #include <qdatetime.h> #include <qptrlist.h> #include <zlib.h> #include <time.h> #include <string.h> const int max_path_len = 4095; // maximum number of character a path may contain static void transformToMsDos(const QDateTime& dt, char* buffer) { if ( dt.isValid() ) { const Q_UINT16 time = ( dt.time().hour() << 11 ) // 5 bit hour | ( dt.time().minute() << 5 ) // 6 bit minute | ( dt.time().second() >> 1 ); // 5 bit double seconds buffer[0] = char(time); buffer[1] = char(time >> 8); const Q_UINT16 date = ( ( dt.date().year() - 1980 ) << 9 ) // 7 bit year 1980-based | ( dt.date().month() << 5 ) // 4 bit month | ( dt.date().day() ); // 5 bit day buffer[2] = char(date); buffer[3] = char(date >> 8); } else // !dt.isValid(), assume 1980-01-01 midnight { buffer[0] = 0; buffer[1] = 0; buffer[2] = 33; buffer[3] = 0; } } static time_t transformFromMsDos(const char* buffer) { Q_UINT16 time = (uchar)buffer[0] | ( (uchar)buffer[1] << 8 ); int h = time >> 11; int m = ( time & 0x7ff ) >> 5; int s = ( time & 0x1f ) * 2 ; QTime qt(h, m, s); Q_UINT16 date = (uchar)buffer[2] | ( (uchar)buffer[3] << 8 ); int y = ( date >> 9 ) + 1980; int o = ( date & 0x1ff ) >> 5; int d = ( date & 0x1f ); QDate qd(y, o, d); QDateTime dt( qd, qt ); return dt.toTime_t(); } // == parsing routines for zip headers struct ParseFileInfo { // file related info // QCString name; // filename mode_t perm; // permissions of this file time_t atime; // last access time (UNIX format) time_t mtime; // modification time (UNIX format) time_t ctime; // creation time (UNIX format) int uid; // user id (-1 if not specified) int gid; // group id (-1 if not specified) QCString guessed_symlink; // guessed symlink target int extralen; // length of extra field // parsing related info bool exttimestamp_seen; // true if extended timestamp extra field // has been parsed bool newinfounix_seen; // true if Info-ZIP Unix New extra field has // been parsed ParseFileInfo() : perm(0100644), uid(-1), gid(-1), extralen(0), exttimestamp_seen(false), newinfounix_seen(false) { ctime = mtime = atime = time(0); } }; static bool parseExtTimestamp(const char *buffer, int size, bool islocal, ParseFileInfo &pfi) { if (size < 1) { kdDebug(7040) << "premature end of extended timestamp (#1)" << endl; return false; }/*end if*/ int flags = *buffer; // read flags buffer += 1; size -= 1; if (flags & 1) { // contains modification time if (size < 4) { kdDebug(7040) << "premature end of extended timestamp (#2)" << endl; return false; }/*end if*/ pfi.mtime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); buffer += 4; size -= 4; }/*end if*/ // central extended field cannot contain more than the modification time // even if other flags are set if (!islocal) { pfi.exttimestamp_seen = true; return true; }/*end if*/ if (flags & 2) { // contains last access time if (size < 4) { kdDebug(7040) << "premature end of extended timestamp (#3)" << endl; return true; }/*end if*/ pfi.atime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); buffer += 4; size -= 4; }/*end if*/ if (flags & 4) { // contains creation time if (size < 4) { kdDebug(7040) << "premature end of extended timestamp (#4)" << endl; return true; }/*end if*/ pfi.ctime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); buffer += 4; }/*end if*/ pfi.exttimestamp_seen = true; return true; } static bool parseInfoZipUnixOld(const char *buffer, int size, bool islocal, ParseFileInfo &pfi) { // spec mandates to omit this field if one of the newer fields are available if (pfi.exttimestamp_seen || pfi.newinfounix_seen) return true; if (size < 8) { kdDebug(7040) << "premature end of Info-ZIP unix extra field old" << endl; return false; }/*end if*/ pfi.atime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); buffer += 4; pfi.mtime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); buffer += 4; if (islocal && size >= 12) { pfi.uid = (uchar)buffer[0] | (uchar)buffer[1] << 8; buffer += 2; pfi.gid = (uchar)buffer[0] | (uchar)buffer[1] << 8; buffer += 2; }/*end if*/ return true; } #if 0 // not needed yet static bool parseInfoZipUnixNew(const char *buffer, int size, bool islocal, ParseFileInfo &pfi) { if (!islocal) { // contains nothing in central field pfi.newinfounix = true; return true; }/*end if*/ if (size < 4) { kdDebug(7040) << "premature end of Info-ZIP unix extra field new" << endl; return false; }/*end if*/ pfi.uid = (uchar)buffer[0] | (uchar)buffer[1] << 8; buffer += 2; pfi.gid = (uchar)buffer[0] | (uchar)buffer[1] << 8; buffer += 2; pfi.newinfounix = true; return true; } #endif static bool parseExtraField(const char *buffer, int size, bool islocal, ParseFileInfo &pfi) { // extra field in central directory doesn't contain useful data, so we // don't bother parsing it if (!islocal) return true; while (size >= 4) { // as long as a potential extra field can be read int magic = (uchar)buffer[0] | (uchar)buffer[1] << 8; buffer += 2; int fieldsize = (uchar)buffer[0] | (uchar)buffer[1] << 8; buffer += 2; size -= 4; if (fieldsize > size) { //kdDebug(7040) << "fieldsize: " << fieldsize << " size: " << size << endl; kdDebug(7040) << "premature end of extra fields reached" << endl; break; }/*end if*/ switch (magic) { case 0x5455: // extended timestamp if (!parseExtTimestamp(buffer, fieldsize, islocal, pfi)) return false; break; case 0x5855: // old Info-ZIP unix extra field if (!parseInfoZipUnixOld(buffer, fieldsize, islocal, pfi)) return false; break; #if 0 // not needed yet case 0x7855: // new Info-ZIP unix extra field if (!parseInfoZipUnixNew(buffer, fieldsize, islocal, pfi)) return false; break; #endif default: /* ignore everything else */; }/*end switch*/ buffer += fieldsize; size -= fieldsize; }/*wend*/ return true; } class KZip::KZipPrivate { public: KZipPrivate() : m_crc( 0 ), m_currentFile( 0L ), m_currentDev( 0L ), m_compression( 8 ), m_extraField( KZip::NoExtraField ), m_offset( 0L ), m_saveFile( 0 ) {} unsigned long m_crc; // checksum KZipFileEntry* m_currentFile; // file currently being written QIODevice* m_currentDev; // filterdev used to write to the above file QPtrList<KZipFileEntry> m_fileList; // flat list of all files, for the index (saves a recursive method ;) int m_compression; KZip::ExtraField m_extraField; unsigned int m_offset; // holds the offset of the place in the zip, // where new data can be appended. after openarchive it points to 0, when in // writeonly mode, or it points to the beginning of the central directory. // each call to writefile updates this value. KSaveFile* m_saveFile; }; KZip::KZip( const QString& filename ) : KArchive( 0L ) { //kdDebug(7040) << "KZip(filename) reached." << endl; Q_ASSERT( !filename.isEmpty() ); m_filename = filename; d = new KZipPrivate; // unusual: this ctor leaves the device set to 0. // This is for the use of KSaveFile, see openArchive. // KDE4: move KSaveFile support to base class, KArchive. } KZip::KZip( QIODevice * dev ) : KArchive( dev ) { //kdDebug(7040) << "KZip::KZip( QIODevice * dev) reached." << endl; d = new KZipPrivate; } KZip::~KZip() { // mjarrett: Closes to prevent ~KArchive from aborting w/o device //kdDebug(7040) << "~KZip reached." << endl; if( isOpened() ) close(); if ( !m_filename.isEmpty() ) { // we created the device ourselves if ( d->m_saveFile ) // writing mode delete d->m_saveFile; else // reading mode delete device(); // (the QFile) } delete d; } bool KZip::openArchive( int mode ) { //kdDebug(7040) << "openarchive reached." << endl; d->m_fileList.clear(); switch ( mode ) { case IO_WriteOnly: // The use of KSaveFile can't be done in the ctor (no mode known yet) // Ideally we would reimplement open() and do it there (BIC) if ( !m_filename.isEmpty() ) { kdDebug(7040) << "Writing to a file using KSaveFile" << endl; d->m_saveFile = new KSaveFile( m_filename ); if ( d->m_saveFile->status() != 0 ) { kdWarning(7040) << "KSaveFile creation for " << m_filename << " failed, " << strerror( d->m_saveFile->status() ) << endl; delete d->m_saveFile; d->m_saveFile = 0; return false; } Q_ASSERT( d->m_saveFile->file() ); setDevice( d->m_saveFile->file() ); } return true; case IO_ReadOnly: case IO_ReadWrite: { // ReadWrite mode still uses QFile for now; we'd need to copy to the tempfile, in fact. if ( !m_filename.isEmpty() ) { setDevice( new QFile( m_filename ) ); if ( !device()->open( mode ) ) return false; } break; // continued below } default: kdWarning(7040) << "Unsupported mode " << mode << endl; return false; } char buffer[47]; // Check that it's a valid ZIP file // the above code opened the underlying device already. QIODevice* dev = device(); if (!dev) { return false; } uint offset = 0; // holds offset, where we read int n; // contains information gathered from the local file headers QAsciiDict<ParseFileInfo> pfi_map(1009, true /*case sensitive */, true /*copy keys*/); pfi_map.setAutoDelete(true); // We set a bool for knowing if we are allowed to skip the start of the file bool startOfFile = true; for (;;) // repeat until 'end of entries' signature is reached { kdDebug(7040) << "loop starts" << endl; kdDebug(7040) << "dev->at() now : " << dev->at() << endl; n = dev->readBlock( buffer, 4 ); if (n < 4) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#1)" << endl; return false; } if ( !memcmp( buffer, "PK\5\6", 4 ) ) // 'end of entries' { kdDebug(7040) << "PK56 found end of archive" << endl; startOfFile = false; break; } if ( !memcmp( buffer, "PK\3\4", 4 ) ) // local file header { kdDebug(7040) << "PK34 found local file header" << endl; startOfFile = false; // can this fail ??? dev->at( dev->at() + 2 ); // skip 'version needed to extract' // read static header stuff n = dev->readBlock( buffer, 24 ); if (n < 24) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#4)" << endl; return false; } int gpf = (uchar)buffer[0]; // "general purpose flag" not "general protection fault" ;-) int compression_mode = (uchar)buffer[2] | (uchar)buffer[3] << 8; time_t mtime = transformFromMsDos( buffer+4 ); Q_LONG compr_size = (uchar)buffer[12] | (uchar)buffer[13] << 8 | (uchar)buffer[14] << 16 | (uchar)buffer[15] << 24; Q_LONG uncomp_size = (uchar)buffer[16] | (uchar)buffer[17] << 8 | (uchar)buffer[18] << 16 | (uchar)buffer[19] << 24; int namelen = (uchar)buffer[20] | (uchar)buffer[21] << 8; int extralen = (uchar)buffer[22] | (uchar)buffer[23] << 8; kdDebug(7040) << "general purpose bit flag: " << gpf << endl; kdDebug(7040) << "compressed size: " << compr_size << endl; kdDebug(7040) << "uncompressed size: " << uncomp_size << endl; kdDebug(7040) << "namelen: " << namelen << endl; kdDebug(7040) << "extralen: " << extralen << endl; kdDebug(7040) << "archive size: " << dev->size() << endl; // read filename QCString filename(namelen + 1); n = dev->readBlock(filename.data(), namelen); if ( n < namelen ) { kdWarning(7040) << "Invalid ZIP file. Name not completely read (#2)" << endl; return false; } ParseFileInfo *pfi = new ParseFileInfo(); pfi->mtime = mtime; pfi_map.insert(filename.data(), pfi); // read and parse the beginning of the extra field, // skip rest of extra field in case it is too long unsigned int extraFieldEnd = dev->at() + extralen; pfi->extralen = extralen; int handledextralen = QMIN(extralen, (int)sizeof buffer); kdDebug(7040) << "handledextralen: " << handledextralen << endl; n = dev->readBlock(buffer, handledextralen); // no error msg necessary as we deliberately truncate the extra field if (!parseExtraField(buffer, handledextralen, true, *pfi)) { kdWarning(7040) << "Invalid ZIP File. Broken ExtraField." << endl; return false; } // jump to end of extra field dev->at( extraFieldEnd ); // we have to take care of the 'general purpose bit flag'. // if bit 3 is set, the header doesn't contain the length of // the file and we look for the signature 'PK\7\8'. if ( gpf & 8 ) { // here we have to read through the compressed data to find // the next PKxx kdDebug(7040) << "trying to seek for next PK78" << endl; bool foundSignature = false; while (!foundSignature) { n = dev->readBlock( buffer, 1 ); if (n < 1) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#2)" << endl; return false; } if ( buffer[0] != 'P' ) continue; n = dev->readBlock( buffer, 3 ); if (n < 3) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#3)" << endl; return false; } // we have to detect three magic tokens here: // PK34 for the next local header in case there is no data descriptor // PK12 for the central header in case there is no data descriptor // PK78 for the data descriptor in case it is following the compressed data if ( buffer[0] == 'K' && buffer[1] == 7 && buffer[2] == 8 ) { foundSignature = true; dev->at( dev->at() + 12 ); // skip the 'data_descriptor' } else if ( ( buffer[0] == 'K' && buffer[1] == 1 && buffer[2] == 2 ) || ( buffer[0] == 'K' && buffer[1] == 3 && buffer[2] == 4 ) ) { foundSignature = true; dev->at( dev->at() - 4 ); // go back 4 bytes, so that the magic bytes can be found... } else if ( buffer[0] == 'P' || buffer[1] == 'P' || buffer[2] == 'P' ) { // We have another P character so we must go back a little to check if it is a magic dev->at( dev->at() - 3 ); } } } else { // here we skip the compressed data and jump to the next header kdDebug(7040) << "general purpose bit flag indicates, that local file header contains valid size" << endl; // check if this could be a symbolic link if (compression_mode == NoCompression && uncomp_size <= max_path_len && uncomp_size > 0) { // read content and store it pfi->guessed_symlink.resize(uncomp_size + 1); kdDebug(7040) << "guessed symlink size: " << uncomp_size << endl; n = dev->readBlock(pfi->guessed_symlink.data(), uncomp_size); if (n < uncomp_size) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#5)" << endl; return false; } } else { if ( compr_size > (Q_LONG)dev->size() ) { // here we cannot trust the compressed size, so scan through the compressed // data to find the next header bool foundSignature = false; while (!foundSignature) { n = dev->readBlock( buffer, 1 ); if (n < 1) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#2)" << endl; return false; } if ( buffer[0] != 'P' ) continue; n = dev->readBlock( buffer, 3 ); if (n < 3) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#3)" << endl; return false; } // we have to detect three magic tokens here: // PK34 for the next local header in case there is no data descriptor // PK12 for the central header in case there is no data descriptor // PK78 for the data descriptor in case it is following the compressed data if ( buffer[0] == 'K' && buffer[1] == 7 && buffer[2] == 8 ) { foundSignature = true; dev->at( dev->at() + 12 ); // skip the 'data_descriptor' } if ( ( buffer[0] == 'K' && buffer[1] == 1 && buffer[2] == 2 ) || ( buffer[0] == 'K' && buffer[1] == 3 && buffer[2] == 4 ) ) { foundSignature = true; dev->at( dev->at() - 4 ); // go back 4 bytes, so that the magic bytes can be found // in the next cycle... } } } else { // kdDebug(7040) << "before interesting dev->at(): " << dev->at() << endl; bool success; success = dev->at( dev->at() + compr_size ); // can this fail ??? /* kdDebug(7040) << "after interesting dev->at(): " << dev->at() << endl; if ( success ) kdDebug(7040) << "dev->at was successful... " << endl; else kdDebug(7040) << "dev->at failed... " << endl;*/ } } // not needed any more /* // here we calculate the length of the file in the zip // with headers and jump to the next header. uint skip = compr_size + namelen + extralen; offset += 30 + skip;*/ } } else if ( !memcmp( buffer, "PK\1\2", 4 ) ) // central block { kdDebug(7040) << "PK12 found central block" << endl; startOfFile = false; // so we reached the central header at the end of the zip file // here we get all interesting data out of the central header // of a file offset = dev->at() - 4; //set offset for appending new files if ( d->m_offset == 0L ) d->m_offset = offset; n = dev->readBlock( buffer + 4, 42 ); if (n < 42) { kdWarning(7040) << "Invalid ZIP file, central entry too short" << endl; // not long enough for valid entry return false; } //int gpf = (uchar)buffer[9] << 8 | (uchar)buffer[10]; //kdDebug() << "general purpose flag=" << gpf << endl; // length of the filename (well, pathname indeed) int namelen = (uchar)buffer[29] << 8 | (uchar)buffer[28]; QCString bufferName( namelen + 1 ); n = dev->readBlock( bufferName.data(), namelen ); if ( n < namelen ) kdWarning(7040) << "Invalid ZIP file. Name not completely read" << endl; ParseFileInfo *pfi = pfi_map[bufferName]; if (!pfi) { // can that happen? pfi_map.insert(bufferName.data(), pfi = new ParseFileInfo()); } QString name( QFile::decodeName(bufferName) ); //kdDebug(7040) << "name: " << name << endl; // only in central header ! see below. // length of extra attributes int extralen = (uchar)buffer[31] << 8 | (uchar)buffer[30]; // length of comment for this file int commlen = (uchar)buffer[33] << 8 | (uchar)buffer[32]; // compression method of this file int cmethod = (uchar)buffer[11] << 8 | (uchar)buffer[10]; //kdDebug(7040) << "cmethod: " << cmethod << endl; //kdDebug(7040) << "extralen: " << extralen << endl; // uncompressed file size uint ucsize = (uchar)buffer[27] << 24 | (uchar)buffer[26] << 16 | (uchar)buffer[25] << 8 | (uchar)buffer[24]; // compressed file size uint csize = (uchar)buffer[23] << 24 | (uchar)buffer[22] << 16 | (uchar)buffer[21] << 8 | (uchar)buffer[20]; // offset of local header uint localheaderoffset = (uchar)buffer[45] << 24 | (uchar)buffer[44] << 16 | (uchar)buffer[43] << 8 | (uchar)buffer[42]; // some clever people use different extra field lengths // in the central header and in the local header... funny. // so we need to get the localextralen to calculate the offset // from localheaderstart to dataoffset int localextralen = pfi->extralen; // FIXME: this will not work if // no local header exists //kdDebug(7040) << "localextralen: " << localextralen << endl; // offset, where the real data for uncompression starts uint dataoffset = localheaderoffset + 30 + localextralen + namelen; //comment only in central header //kdDebug(7040) << "esize: " << esize << endl; //kdDebug(7040) << "eoffset: " << eoffset << endl; //kdDebug(7040) << "csize: " << csize << endl; int os_madeby = (uchar)buffer[5]; bool isdir = false; int access = 0100644; if (os_madeby == 3) { // good ole unix access = (uchar)buffer[40] | (uchar)buffer[41] << 8; } QString entryName; if ( name.endsWith( "/" ) ) // Entries with a trailing slash are directories { isdir = true; name = name.left( name.length() - 1 ); if (os_madeby != 3) access = S_IFDIR | 0755; else Q_ASSERT(access & S_IFDIR); } int pos = name.findRev( '/' ); if ( pos == -1 ) entryName = name; else entryName = name.mid( pos + 1 ); Q_ASSERT( !entryName.isEmpty() ); KArchiveEntry* entry; if ( isdir ) { QString path = QDir::cleanDirPath( name ); KArchiveEntry* ent = rootDir()->entry( path ); if ( ent && ent->isDirectory() ) { //kdDebug(7040) << "Directory already exists, NOT going to add it again" << endl; entry = 0L; } else { entry = new KArchiveDirectory( this, entryName, access, (int)pfi->mtime, rootDir()->user(), rootDir()->group(), QString::null ); //kdDebug(7040) << "KArchiveDirectory created, entryName= " << entryName << ", name=" << name << endl; } } else { QString symlink; if (S_ISLNK(access)) { symlink = QFile::decodeName(pfi->guessed_symlink); } entry = new KZipFileEntry( this, entryName, access, pfi->mtime, rootDir()->user(), rootDir()->group(), symlink, name, dataoffset, ucsize, cmethod, csize ); static_cast<KZipFileEntry *>(entry)->setHeaderStart( localheaderoffset ); //kdDebug(7040) << "KZipFileEntry created, entryName= " << entryName << ", name=" << name << endl; d->m_fileList.append( static_cast<KZipFileEntry *>( entry ) ); } if ( entry ) { if ( pos == -1 ) { rootDir()->addEntry(entry); } else { // In some tar files we can find dir/./file => call cleanDirPath QString path = QDir::cleanDirPath( name.left( pos ) ); // Ensure container directory exists, create otherwise KArchiveDirectory * tdir = findOrCreate( path ); tdir->addEntry(entry); } } //calculate offset to next entry offset += 46 + commlen + extralen + namelen; bool b = dev->at(offset); Q_ASSERT( b ); if ( !b ) return false; } else if ( startOfFile ) { // The file does not start with any ZIP header (e.g. self-extractable ZIP files) // Therefore we need to find the first PK\003\004 (local header) kdDebug(7040) << "Try to skip start of file" << endl; startOfFile = false; bool foundSignature = false; while (!foundSignature) { n = dev->readBlock( buffer, 1 ); if (n < 1) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. " << k_funcinfo << endl; return false; } if ( buffer[0] != 'P' ) continue; n = dev->readBlock( buffer, 3 ); if (n < 3) { kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. " << k_funcinfo << endl; return false; } // We have to detect the magic token for a local header: PK\003\004 /* * Note: we do not need to check the other magics, if the ZIP file has no * local header, then it has not any files! */ if ( buffer[0] == 'K' && buffer[1] == 3 && buffer[2] == 4 ) { foundSignature = true; dev->at( dev->at() - 4 ); // go back 4 bytes, so that the magic bytes can be found... } else if ( buffer[0] == 'P' || buffer[1] == 'P' || buffer[2] == 'P' ) { // We have another P character so we must go back a little to check if it is a magic dev->at( dev->at() - 3 ); } } } else { kdWarning(7040) << "Invalid ZIP file. Unrecognized header at offset " << offset << endl; return false; } } //kdDebug(7040) << "*** done *** " << endl; return true; } bool KZip::closeArchive() { if ( ! ( mode() & IO_WriteOnly ) ) { //kdDebug(7040) << "closearchive readonly reached." << endl; return true; } kdDebug() << k_funcinfo << "device=" << device() << endl; //ReadWrite or WriteOnly //write all central dir file entries if ( !device() ) // saving aborted return false; // to be written at the end of the file... char buffer[ 22 ]; // first used for 12, then for 22 at the end uLong crc = crc32(0L, Z_NULL, 0); Q_LONG centraldiroffset = device()->at(); //kdDebug(7040) << "closearchive: centraldiroffset: " << centraldiroffset << endl; Q_LONG atbackup = centraldiroffset; QPtrListIterator<KZipFileEntry> it( d->m_fileList ); for ( ; it.current() ; ++it ) { //set crc and compressed size in each local file header if ( !device()->at( it.current()->headerStart() + 14 ) ) return false; //kdDebug(7040) << "closearchive setcrcandcsize: filename: " // << it.current()->path() // << " encoding: "<< it.current()->encoding() << endl; uLong mycrc = it.current()->crc32(); buffer[0] = char(mycrc); // crc checksum, at headerStart+14 buffer[1] = char(mycrc >> 8); buffer[2] = char(mycrc >> 16); buffer[3] = char(mycrc >> 24); int mysize1 = it.current()->compressedSize(); buffer[4] = char(mysize1); // compressed file size, at headerStart+18 buffer[5] = char(mysize1 >> 8); buffer[6] = char(mysize1 >> 16); buffer[7] = char(mysize1 >> 24); int myusize = it.current()->size(); buffer[8] = char(myusize); // uncompressed file size, at headerStart+22 buffer[9] = char(myusize >> 8); buffer[10] = char(myusize >> 16); buffer[11] = char(myusize >> 24); if ( device()->writeBlock( buffer, 12 ) != 12 ) return false; } device()->at( atbackup ); for ( it.toFirst(); it.current() ; ++it ) { //kdDebug(7040) << "closearchive: filename: " << it.current()->path() // << " encoding: "<< it.current()->encoding() << endl; QCString path = QFile::encodeName(it.current()->path()); const int extra_field_len = 9; int bufferSize = extra_field_len + path.length() + 46; char* buffer = new char[ bufferSize ]; memset(buffer, 0, 46); // zero is a nice default for most header fields const char head[] = { 'P', 'K', 1, 2, // central file header signature 0x14, 3, // version made by (3 == UNIX) 0x14, 0 // version needed to extract }; // I do not know why memcpy is not working here //memcpy(buffer, head, sizeof(head)); qmemmove(buffer, head, sizeof(head)); buffer[ 10 ] = char(it.current()->encoding()); // compression method buffer[ 11 ] = char(it.current()->encoding() >> 8); transformToMsDos( it.current()->datetime(), &buffer[ 12 ] ); uLong mycrc = it.current()->crc32(); buffer[ 16 ] = char(mycrc); // crc checksum buffer[ 17 ] = char(mycrc >> 8); buffer[ 18 ] = char(mycrc >> 16); buffer[ 19 ] = char(mycrc >> 24); int mysize1 = it.current()->compressedSize(); buffer[ 20 ] = char(mysize1); // compressed file size buffer[ 21 ] = char(mysize1 >> 8); buffer[ 22 ] = char(mysize1 >> 16); buffer[ 23 ] = char(mysize1 >> 24); int mysize = it.current()->size(); buffer[ 24 ] = char(mysize); // uncompressed file size buffer[ 25 ] = char(mysize >> 8); buffer[ 26 ] = char(mysize >> 16); buffer[ 27 ] = char(mysize >> 24); #ifndef ORIGINAL_CODE buffer[ 28 ] = char(path.length()); // filename length buffer[ 29 ] = char(path.length() >> 8); #else buffer[ 28 ] = char(it.current()->path().length()); // filename length buffer[ 29 ] = char(it.current()->path().length() >> 8); #endif buffer[ 30 ] = char(extra_field_len); buffer[ 31 ] = char(extra_field_len >> 8); buffer[ 40 ] = char(it.current()->permissions()); buffer[ 41 ] = char(it.current()->permissions() >> 8); int myhst = it.current()->headerStart(); buffer[ 42 ] = char(myhst); //relative offset of local header buffer[ 43 ] = char(myhst >> 8); buffer[ 44 ] = char(myhst >> 16); buffer[ 45 ] = char(myhst >> 24); // file name strncpy( buffer + 46, path, path.length() ); //kdDebug(7040) << "closearchive length to write: " << bufferSize << endl; // extra field char *extfield = buffer + 46 + path.length(); extfield[0] = 'U'; extfield[1] = 'T'; extfield[2] = 5; extfield[3] = 0; extfield[4] = 1 | 2 | 4; // specify flags from local field // (unless I misread the spec) // provide only modification time unsigned long time = (unsigned long)it.current()->date(); extfield[5] = char(time); extfield[6] = char(time >> 8); extfield[7] = char(time >> 16); extfield[8] = char(time >> 24); crc = crc32(crc, (Bytef *)buffer, bufferSize ); bool ok = ( device()->writeBlock( buffer, bufferSize ) == bufferSize ); delete[] buffer; if ( !ok ) return false; } Q_LONG centraldirendoffset = device()->at(); //kdDebug(7040) << "closearchive: centraldirendoffset: " << centraldirendoffset << endl; //kdDebug(7040) << "closearchive: device()->at(): " << device()->at() << endl; //write end of central dir record. buffer[ 0 ] = 'P'; //end of central dir signature buffer[ 1 ] = 'K'; buffer[ 2 ] = 5; buffer[ 3 ] = 6; buffer[ 4 ] = 0; // number of this disk buffer[ 5 ] = 0; buffer[ 6 ] = 0; // number of disk with start of central dir buffer[ 7 ] = 0; int count = d->m_fileList.count(); //kdDebug(7040) << "number of files (count): " << count << endl; buffer[ 8 ] = char(count); // total number of entries in central dir of buffer[ 9 ] = char(count >> 8); // this disk buffer[ 10 ] = buffer[ 8 ]; // total number of entries in the central dir buffer[ 11 ] = buffer[ 9 ]; int cdsize = centraldirendoffset - centraldiroffset; buffer[ 12 ] = char(cdsize); // size of the central dir buffer[ 13 ] = char(cdsize >> 8); buffer[ 14 ] = char(cdsize >> 16); buffer[ 15 ] = char(cdsize >> 24); //kdDebug(7040) << "end : centraldiroffset: " << centraldiroffset << endl; //kdDebug(7040) << "end : centraldirsize: " << cdsize << endl; buffer[ 16 ] = char(centraldiroffset); // central dir offset buffer[ 17 ] = char(centraldiroffset >> 8); buffer[ 18 ] = char(centraldiroffset >> 16); buffer[ 19 ] = char(centraldiroffset >> 24); buffer[ 20 ] = 0; //zipfile comment length buffer[ 21 ] = 0; if ( device()->writeBlock( buffer, 22 ) != 22 ) return false; if ( d->m_saveFile ) { d->m_saveFile->close(); setDevice( 0 ); delete d->m_saveFile; d->m_saveFile = 0; } //kdDebug(7040) << __FILE__" reached." << endl; return true; } bool KZip::writeDir(const QString& name, const QString& user, const QString& group) { // Zip files have no explicit directories, they are implicitly created during extraction time // when file entries have paths in them. // However, to support empty directories, we must create a dummy file entry which ends with '/'. QString dirName = name; if (!name.endsWith("/")) dirName = dirName.append('/'); mode_t perm = 040755; time_t the_time = time(0); return writeFile(dirName, user, group, 0, perm, the_time, the_time, the_time, 0); } // Doesn't need to be reimplemented anymore. Remove for KDE-4.0 bool KZip::writeFile( const QString& name, const QString& user, const QString& group, uint size, const char* data ) { mode_t mode = 0100644; time_t the_time = time(0); return KArchive::writeFile( name, user, group, size, mode, the_time, the_time, the_time, data ); } // Doesn't need to be reimplemented anymore. Remove for KDE-4.0 bool KZip::writeFile( const QString& name, const QString& user, const QString& group, uint size, mode_t perm, time_t atime, time_t mtime, time_t ctime, const char* data ) { return KArchive::writeFile(name, user, group, size, perm, atime, mtime, ctime, data); } // Doesn't need to be reimplemented anymore. Remove for KDE-4.0 bool KZip::prepareWriting( const QString& name, const QString& user, const QString& group, uint size ) { mode_t dflt_perm = 0100644; time_t the_time = time(0); return prepareWriting(name,user,group,size,dflt_perm, the_time,the_time,the_time); } // Doesn't need to be reimplemented anymore. Remove for KDE-4.0 bool KZip::prepareWriting(const QString& name, const QString& user, const QString& group, uint size, mode_t perm, time_t atime, time_t mtime, time_t ctime) { return KArchive::prepareWriting(name,user,group,size,perm,atime,mtime,ctime); } bool KZip::prepareWriting_impl(const QString &name, const QString &user, const QString &group, uint /*size*/, mode_t perm, time_t atime, time_t mtime, time_t ctime) { //kdDebug(7040) << "prepareWriting reached." << endl; if ( !isOpened() ) { qWarning( "KZip::writeFile: You must open the zip file before writing to it\n"); return false; } if ( ! ( mode() & IO_WriteOnly ) ) // accept WriteOnly and ReadWrite { qWarning( "KZip::writeFile: You must open the zip file for writing\n"); return false; } if ( !device() ) { // aborted //kdWarning(7040) << "prepareWriting_impl: no device" << endl; return false; } // set right offset in zip. if ( !device()->at( d->m_offset ) ) { kdWarning(7040) << "prepareWriting_impl: cannot seek in ZIP file. Disk full?" << endl; abort(); return false; } // delete entries in the filelist with the same filename as the one we want // to save, so that we don�t have duplicate file entries when viewing the zip // with konqi... // CAUTION: the old file itself is still in the zip and won't be removed !!! QPtrListIterator<KZipFileEntry> it( d->m_fileList ); //kdDebug(7040) << "filename to write: " << name <<endl; for ( ; it.current() ; ++it ) { //kdDebug(7040) << "prepfilename: " << it.current()->path() <<endl; if (name == it.current()->path() ) { //kdDebug(7040) << "removing following entry: " << it.current()->path() <<endl; d->m_fileList.remove(); } } // Find or create parent dir KArchiveDirectory* parentDir = rootDir(); QString fileName( name ); int i = name.findRev( '/' ); if ( i != -1 ) { QString dir = name.left( i ); fileName = name.mid( i + 1 ); //kdDebug(7040) << "KZip::prepareWriting ensuring " << dir << " exists. fileName=" << fileName << endl; parentDir = findOrCreate( dir ); } // construct a KZipFileEntry and add it to list #ifdef ORIGINAL_CODE KZipFileEntry * e = new KZipFileEntry( this, fileName, perm, mtime, user, group, QString::null, name, device()->at() + 30 + name.length(), // start 0 /*size unknown yet*/, d->m_compression, 0 /*csize unknown yet*/ ); #else int extra_field_len = 0; if ( d->m_extraField == ModificationTime ) extra_field_len = 17; // value also used in doneWriting() QCString encodedName = QFile::encodeName(name); KZipFileEntry * e = new KZipFileEntry( this, fileName, perm, mtime, user, group, QString::null, name, device()->at() + 30 + encodedName.length() + extra_field_len, // start 0 /*size unknown yet*/, d->m_compression, 0 /*csize unknown yet*/ ); #endif e->setHeaderStart( device()->at() ); //kdDebug(7040) << "wrote file start: " << e->position() << " name: " << name << endl; parentDir->addEntry( e ); d->m_currentFile = e; d->m_fileList.append( e ); #ifdef ORIGINAL_CODE int extra_field_len = 0; if ( d->m_extraField == ModificationTime ) extra_field_len = 17; // value also used in doneWriting() // write out zip header QCString encodedName = QFile::encodeName(name); #endif int bufferSize = extra_field_len + encodedName.length() + 30; //kdDebug(7040) << "KZip::prepareWriting bufferSize=" << bufferSize << endl; char* buffer = new char[ bufferSize ]; buffer[ 0 ] = 'P'; //local file header signature buffer[ 1 ] = 'K'; buffer[ 2 ] = 3; buffer[ 3 ] = 4; buffer[ 4 ] = 0x14; // version needed to extract buffer[ 5 ] = 0; buffer[ 6 ] = 0; // general purpose bit flag buffer[ 7 ] = 0; buffer[ 8 ] = char(e->encoding()); // compression method buffer[ 9 ] = char(e->encoding() >> 8); transformToMsDos( e->datetime(), &buffer[ 10 ] ); buffer[ 14 ] = 'C'; //dummy crc buffer[ 15 ] = 'R'; buffer[ 16 ] = 'C'; buffer[ 17 ] = 'q'; buffer[ 18 ] = 'C'; //compressed file size buffer[ 19 ] = 'S'; buffer[ 20 ] = 'I'; buffer[ 21 ] = 'Z'; buffer[ 22 ] = 'U'; //uncompressed file size buffer[ 23 ] = 'S'; buffer[ 24 ] = 'I'; buffer[ 25 ] = 'Z'; buffer[ 26 ] = (uchar)(encodedName.length()); //filename length buffer[ 27 ] = (uchar)(encodedName.length() >> 8); buffer[ 28 ] = (uchar)(extra_field_len); // extra field length buffer[ 29 ] = (uchar)(extra_field_len >> 8); // file name strncpy( buffer + 30, encodedName, encodedName.length() ); // extra field if ( d->m_extraField == ModificationTime ) { char *extfield = buffer + 30 + encodedName.length(); // "Extended timestamp" header (0x5455) extfield[0] = 'U'; extfield[1] = 'T'; extfield[2] = 13; // data size extfield[3] = 0; extfield[4] = 1 | 2 | 4; // contains mtime, atime, ctime extfield[5] = char(mtime); extfield[6] = char(mtime >> 8); extfield[7] = char(mtime >> 16); extfield[8] = char(mtime >> 24); extfield[9] = char(atime); extfield[10] = char(atime >> 8); extfield[11] = char(atime >> 16); extfield[12] = char(atime >> 24); extfield[13] = char(ctime); extfield[14] = char(ctime >> 8); extfield[15] = char(ctime >> 16); extfield[16] = char(ctime >> 24); } // Write header bool b = (device()->writeBlock( buffer, bufferSize ) == bufferSize ); d->m_crc = 0L; delete[] buffer; Q_ASSERT( b ); if (!b) { abort(); return false; } // Prepare device for writing the data // Either device() if no compression, or a KFilterDev to compress if ( d->m_compression == 0 ) { d->m_currentDev = device(); return true; } d->m_currentDev = KFilterDev::device( device(), "application/x-gzip", false ); Q_ASSERT( d->m_currentDev ); if ( !d->m_currentDev ) { abort(); return false; // ouch } static_cast<KFilterDev *>(d->m_currentDev)->setSkipHeaders(); // Just zlib, not gzip b = d->m_currentDev->open( IO_WriteOnly ); Q_ASSERT( b ); return b; } bool KZip::doneWriting( uint size ) { if ( d->m_currentFile->encoding() == 8 ) { // Finish (void)d->m_currentDev->writeBlock( 0, 0 ); delete d->m_currentDev; } // If 0, d->m_currentDev was device() - don't delete ;) d->m_currentDev = 0L; Q_ASSERT( d->m_currentFile ); //kdDebug(7040) << "donewriting reached." << endl; //kdDebug(7040) << "filename: " << d->m_currentFile->path() << endl; //kdDebug(7040) << "getpos (at): " << device()->at() << endl; d->m_currentFile->setSize(size); int extra_field_len = 0; if ( d->m_extraField == ModificationTime ) extra_field_len = 17; // value also used in doneWriting() #ifndef ORIGINAL_CODE QCString encodedName = QFile::encodeName(d->m_currentFile->path()); int csize = device()->at() - d->m_currentFile->headerStart() - 30 - encodedName.length() - extra_field_len; #else int csize = device()->at() - d->m_currentFile->headerStart() - 30 - d->m_currentFile->path().length() - extra_field_len; #endif d->m_currentFile->setCompressedSize(csize); //kdDebug(7040) << "usize: " << d->m_currentFile->size() << endl; //kdDebug(7040) << "csize: " << d->m_currentFile->compressedSize() << endl; //kdDebug(7040) << "headerstart: " << d->m_currentFile->headerStart() << endl; //kdDebug(7040) << "crc: " << d->m_crc << endl; d->m_currentFile->setCRC32( d->m_crc ); d->m_currentFile = 0L; // update saved offset for appending new files d->m_offset = device()->at(); return true; } bool KZip::writeSymLink(const QString &name, const QString &target, const QString &user, const QString &group, mode_t perm, time_t atime, time_t mtime, time_t ctime) { return KArchive::writeSymLink(name,target,user,group,perm,atime,mtime,ctime); } bool KZip::writeSymLink_impl(const QString &name, const QString &target, const QString &user, const QString &group, mode_t perm, time_t atime, time_t mtime, time_t ctime) { // reassure that symlink flag is set, otherwise strange things happen on // extraction perm |= S_IFLNK; Compression c = compression(); setCompression(NoCompression); // link targets are never compressed if (!prepareWriting(name, user, group, 0, perm, atime, mtime, ctime)) { kdWarning() << "KZip::writeFile prepareWriting failed" << endl; setCompression(c); return false; } QCString symlink_target = QFile::encodeName(target); if (!writeData(symlink_target, symlink_target.length())) { kdWarning() << "KZip::writeFile writeData failed" << endl; setCompression(c); return false; } if (!doneWriting(symlink_target.length())) { kdWarning() << "KZip::writeFile doneWriting failed" << endl; setCompression(c); return false; } setCompression(c); return true; } void KZip::virtual_hook( int id, void* data ) { switch (id) { case VIRTUAL_WRITE_DATA: { WriteDataParams* params = reinterpret_cast<WriteDataParams *>(data); params->retval = writeData_impl( params->data, params->size ); break; } case VIRTUAL_WRITE_SYMLINK: { WriteSymlinkParams *params = reinterpret_cast<WriteSymlinkParams *>(data); params->retval = writeSymLink_impl(*params->name,*params->target, *params->user,*params->group,params->perm, params->atime,params->mtime,params->ctime); break; } case VIRTUAL_PREPARE_WRITING: { PrepareWritingParams *params = reinterpret_cast<PrepareWritingParams *>(data); params->retval = prepareWriting_impl(*params->name,*params->user, *params->group,params->size,params->perm, params->atime,params->mtime,params->ctime); break; } default: KArchive::virtual_hook( id, data ); }/*end switch*/ } // made virtual using virtual_hook bool KZip::writeData(const char * c, uint i) { return KArchive::writeData( c, i ); } bool KZip::writeData_impl(const char * c, uint i) { Q_ASSERT( d->m_currentFile ); Q_ASSERT( d->m_currentDev ); if (!d->m_currentFile || !d->m_currentDev) { abort(); return false; } // crc to be calculated over uncompressed stuff... // and they didn't mention it in their docs... d->m_crc = crc32(d->m_crc, (const Bytef *) c , i); Q_LONG written = d->m_currentDev->writeBlock( c, i ); //kdDebug(7040) << "KZip::writeData wrote " << i << " bytes." << endl; bool ok = written == (Q_LONG)i; if ( !ok ) abort(); return ok; } void KZip::setCompression( Compression c ) { d->m_compression = ( c == NoCompression ) ? 0 : 8; } KZip::Compression KZip::compression() const { return ( d->m_compression == 8 ) ? DeflateCompression : NoCompression; } void KZip::setExtraField( ExtraField ef ) { d->m_extraField = ef; } KZip::ExtraField KZip::extraField() const { return d->m_extraField; } void KZip::abort() { if ( d->m_saveFile ) { d->m_saveFile->abort(); setDevice( 0 ); } } QByteArray KZipFileEntry::data() const { QIODevice* dev = device(); QByteArray arr; if ( dev ) { arr = dev->readAll(); delete dev; } return arr; } QIODevice* KZipFileEntry::device() const { //kdDebug(7040) << "KZipFileEntry::device creating iodevice limited to pos=" << position() << ", csize=" << compressedSize() << endl; // Limit the reading to the appropriate part of the underlying device (e.g. file) KLimitedIODevice* limitedDev = new KLimitedIODevice( archive()->device(), position(), compressedSize() ); if ( encoding() == 0 || compressedSize() == 0 ) // no compression (or even no data) return limitedDev; if ( encoding() == 8 ) { // On top of that, create a device that uncompresses the zlib data QIODevice* filterDev = KFilterDev::device( limitedDev, "application/x-gzip" ); if ( !filterDev ) return 0L; // ouch static_cast<KFilterDev *>(filterDev)->setSkipHeaders(); // Just zlib, not gzip bool b = filterDev->open( IO_ReadOnly ); Q_ASSERT( b ); return filterDev; } kdError() << "This zip file contains files compressed with method " << encoding() <<", this method is currently not supported by KZip," <<" please use a command-line tool to handle this file." << endl; return 0L; }

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