500 lines
17 KiB
C++
500 lines
17 KiB
C++
/*************************************************************************
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*
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* $RCSfile: ZipOutputStream.cxx,v $
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*
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* $Revision: 1.33 $
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*
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* last change: $Author: mtg $ $Date: 2001-10-02 22:08:40 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): Martin Gallwey (gallwey@sun.com)
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*
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*
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************************************************************************/
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#ifndef _ZIP_OUTPUT_STREAM_HXX
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#include <ZipOutputStream.hxx>
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#endif
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#ifndef _VOS_DIAGNOSE_H_
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#include <vos/diagnose.hxx>
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#endif
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#ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPCONSTANTS_HPP_
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#include <com/sun/star/packages/zip/ZipConstants.hpp>
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#endif
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#ifndef _OSL_TIME_H_
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#include <osl/time.h>
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#endif
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#ifndef _ENCRYPTION_DATA_HXX_
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#include <EncryptionData.hxx>
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#endif
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#ifndef _IMPL_VALID_CHARACTERS_HXX_
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#include <ImplValidCharacters.hxx>
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#endif
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#ifndef _PACKAGE_CONSTANTS_HXX_
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#include <PackageConstants.hxx>
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#endif
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#ifndef _ZIP_ENTRY_HXX_
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#include <ZipEntry.hxx>
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#endif
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using namespace rtl;
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using namespace com::sun::star::io;
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using namespace com::sun::star::uno;
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using namespace com::sun::star::packages;
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using namespace com::sun::star::packages::zip;
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using namespace com::sun::star::packages::zip::ZipConstants;
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/** This class is used to write Zip files
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*/
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ZipOutputStream::ZipOutputStream( Reference < XOutputStream > &xOStream, sal_Bool bNewSpanning )
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: xStream(xOStream)
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, aChucker(xOStream)
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, nMethod(DEFLATED)
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, pCurrentEntry(NULL)
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, bFinished(sal_False)
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, bEncryptCurrentEntry(sal_False)
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, aBuffer(n_ConstBufferSize)
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, aDeflater(DEFAULT_COMPRESSION, sal_True)
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, bSpanning ( bNewSpanning )
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{
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}
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ZipOutputStream::~ZipOutputStream( void )
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{
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for (sal_Int32 i = 0, nEnd = aZipList.size(); i < nEnd; i++)
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delete aZipList[i];
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}
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void SAL_CALL ZipOutputStream::setComment( const ::rtl::OUString& rComment )
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throw(RuntimeException)
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{
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sComment = rComment;
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}
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void SAL_CALL ZipOutputStream::setMethod( sal_Int32 nNewMethod )
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throw(RuntimeException)
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{
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nMethod = static_cast < sal_Int16 > (nNewMethod);
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}
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void SAL_CALL ZipOutputStream::setLevel( sal_Int32 nNewLevel )
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throw(RuntimeException)
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{
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aDeflater.setLevel( nNewLevel);
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}
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void SAL_CALL ZipOutputStream::putNextEntry( ZipEntry& rEntry,
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vos::ORef < EncryptionData > &xEncryptData,
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sal_Bool bEncrypt)
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throw(IOException, RuntimeException)
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{
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if ( bSpanning && ! aZipList.size() )
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{
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Sequence < sal_Int8 > aSequence ( 4 );
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sal_Int8 *pNum = aSequence.getArray();
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pNum[0] = 'P';
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pNum[1] = 'K';
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pNum[2] = 7;
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pNum[3] = 8;
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aChucker.writeBytes( aSequence, 4, pNum );
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}
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if (pCurrentEntry != NULL)
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closeEntry();
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if (rEntry.nTime == -1)
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rEntry.nTime = getCurrentDosTime();
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if (rEntry.nMethod == -1)
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rEntry.nMethod = nMethod;
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rEntry.nVersion = 20;
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if (rEntry.nSize == -1 || rEntry.nCompressedSize == -1 ||
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rEntry.nCrc == -1)
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rEntry.nFlag = 8;
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else if (rEntry.nSize != -1 && rEntry.nCompressedSize != -1 &&
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rEntry.nCrc != -1)
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rEntry.nFlag = 0;
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if (bEncrypt)
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{
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bEncryptCurrentEntry = sal_True;
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rtlCipherError aResult;
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aCipher = rtl_cipher_create ( rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream);
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aResult = rtl_cipher_init( aCipher, rtl_Cipher_DirectionEncode,
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reinterpret_cast < const sal_uInt8 * > (xEncryptData->aKey.getConstArray()),
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xEncryptData->aKey.getLength(),
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xEncryptData->aInitVector.getConstArray(),
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xEncryptData->aInitVector.getLength());
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OSL_ASSERT( aResult == rtl_Cipher_E_None );
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aDigest = rtl_digest_createSHA1();
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mnDigested = 0;
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rEntry.nFlag |= 1 << 4;
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xCurrentEncryptData = xEncryptData;
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}
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sal_Int32 nLOCLength = writeLOC(rEntry);
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rEntry.nOffset = static_cast < sal_Int32 > (aChucker.getPosition()) - nLOCLength;
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aZipList.push_back( &rEntry );
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pCurrentEntry = &rEntry;
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}
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void SAL_CALL ZipOutputStream::close( )
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throw(IOException, RuntimeException)
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{
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finish();
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}
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void SAL_CALL ZipOutputStream::closeEntry( )
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throw(IOException, RuntimeException)
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{
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ZipEntry *pEntry = pCurrentEntry;
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if (pEntry)
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{
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switch (pEntry->nMethod)
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{
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case DEFLATED:
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aDeflater.finish();
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while (!aDeflater.finished())
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doDeflate();
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if ((pEntry->nFlag & 8) == 0)
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{
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if (pEntry->nSize != aDeflater.getTotalIn())
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{
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VOS_DEBUG_ONLY("Invalid entry size");
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}
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if (pEntry->nCompressedSize != aDeflater.getTotalOut())
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{
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//VOS_DEBUG_ONLY("Invalid entry compressed size");
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// Different compression strategies make the merit of this
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// test somewhat dubious
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pEntry->nCompressedSize = aDeflater.getTotalOut();
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}
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if (pEntry->nCrc != aCRC.getValue())
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{
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VOS_DEBUG_ONLY("Invalid entry CRC-32");
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}
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}
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else
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{
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pEntry->nSize = aDeflater.getTotalIn();
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pEntry->nCompressedSize = aDeflater.getTotalOut();
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pEntry->nCrc = aCRC.getValue();
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if ( bEncryptCurrentEntry )
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pEntry->nSize = pEntry->nCompressedSize;
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writeEXT(*pEntry);
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}
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aDeflater.reset();
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aCRC.reset();
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break;
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case STORED:
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if (!((pEntry->nFlag & 8) == 0))
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VOS_ENSURE ( 0, "Serious error, one of compressed size, size or CRC was -1 in a STORED stream");
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break;
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default:
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VOS_DEBUG_ONLY("Invalid compression method");
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break;
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}
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if (bEncryptCurrentEntry)
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{
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rtlDigestError aDigestResult;
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aEncryptionBuffer.realloc ( 0 );
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bEncryptCurrentEntry = sal_False;
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rtl_cipher_destroy ( aCipher );
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xCurrentEncryptData->aDigest.realloc ( RTL_DIGEST_LENGTH_SHA1 );
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aDigestResult = rtl_digest_getSHA1 ( aDigest, xCurrentEncryptData->aDigest.getArray(), RTL_DIGEST_LENGTH_SHA1 );
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OSL_ASSERT( aDigestResult == rtl_Digest_E_None );
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rtl_digest_destroySHA1 ( aDigest );
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}
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pCurrentEntry = NULL;
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}
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}
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void SAL_CALL ZipOutputStream::write( const Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
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throw(IOException, RuntimeException)
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{
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switch (pCurrentEntry->nMethod)
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{
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case DEFLATED:
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if (!aDeflater.finished())
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{
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aDeflater.setInputSegment(rBuffer, nNewOffset, nNewLength);
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while (!aDeflater.needsInput())
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doDeflate();
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if (!bEncryptCurrentEntry)
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aCRC.updateSegment(rBuffer, nNewOffset, nNewLength);
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}
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break;
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case STORED:
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{
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Sequence < sal_Int8 > aTmpBuffer ( rBuffer.getConstArray(), nNewLength );
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aChucker.writeBytes( aTmpBuffer );
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}
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break;
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}
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}
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void SAL_CALL ZipOutputStream::rawWrite( Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
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throw(IOException, RuntimeException)
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{
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Sequence < sal_Int8 > aTmpBuffer ( rBuffer.getConstArray(), nNewLength );
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aChucker.writeBytes( aTmpBuffer );
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}
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void SAL_CALL ZipOutputStream::rawCloseEntry( )
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throw(IOException, RuntimeException)
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{
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if ( pCurrentEntry->nMethod == DEFLATED )
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writeEXT(*pCurrentEntry);
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pCurrentEntry = NULL;
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}
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void SAL_CALL ZipOutputStream::finish( )
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throw(IOException, RuntimeException)
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{
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if (bFinished)
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return;
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if (pCurrentEntry != NULL)
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closeEntry();
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if (aZipList.size() < 1)
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VOS_DEBUG_ONLY("Zip file must have at least one entry!\n");
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sal_Int32 nOffset= static_cast < sal_Int32 > (aChucker.getPosition());
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for (sal_Int32 i =0, nEnd = aZipList.size(); i < nEnd; i++)
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writeCEN( *aZipList[i] );
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writeEND( nOffset, static_cast < sal_Int32 > (aChucker.getPosition()) - nOffset);
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bFinished = sal_True;
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xStream->flush();
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}
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void ZipOutputStream::doDeflate()
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{
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sal_Int32 nLength = aDeflater.doDeflateSegment(aBuffer, 0, aBuffer.getLength());
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sal_Int32 nOldLength = aBuffer.getLength();
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if ( nLength > 0 )
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{
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Sequence < sal_Int8 > aTmpBuffer ( aBuffer.getConstArray(), nLength );
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const void *pTmpBuffer = static_cast < const void * > ( aTmpBuffer.getConstArray() );
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if (bEncryptCurrentEntry)
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{
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// Need to update our digest before encryption...
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rtlDigestError aDigestResult = rtl_Digest_E_None;
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sal_Int16 nDiff = n_ConstDigestLength - mnDigested;
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if ( nDiff )
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{
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sal_Int16 nEat = static_cast < sal_Int16 > ( nDiff > nLength ? nLength : nDiff );
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aDigestResult = rtl_digest_updateSHA1 ( aDigest, pTmpBuffer, nEat );
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mnDigested += nEat;
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}
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OSL_ASSERT( aDigestResult == rtl_Digest_E_None );
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aEncryptionBuffer.realloc ( nLength );
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rtlCipherError aCipherResult;
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aCipherResult = rtl_cipher_encode ( aCipher, pTmpBuffer,
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nLength, reinterpret_cast < sal_uInt8 * > (aEncryptionBuffer.getArray()), nLength );
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OSL_ASSERT( aCipherResult == rtl_Cipher_E_None );
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aChucker.writeBytes ( aEncryptionBuffer );
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aCRC.update ( aEncryptionBuffer );
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aEncryptionBuffer.realloc ( nOldLength );
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}
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else
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aChucker.writeBytes ( aTmpBuffer );
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}
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}
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void ZipOutputStream::writeEND(sal_uInt32 nOffset, sal_uInt32 nLength)
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throw(IOException, RuntimeException)
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{
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aChucker << ENDSIG;
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aChucker << static_cast < sal_Int16 > ( 0 );
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aChucker << static_cast < sal_Int16 > ( 0 );
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aChucker << static_cast < sal_Int16 > ( aZipList.size() );
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aChucker << static_cast < sal_Int16 > ( aZipList.size() );
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aChucker << nLength;
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aChucker << nOffset;
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aChucker << static_cast < sal_Int16 > ( 0 );
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}
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void ZipOutputStream::writeCEN( const ZipEntry &rEntry )
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throw(IOException, RuntimeException)
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{
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sal_Int16 nNameLength = static_cast < sal_Int16 > ( rEntry.sName.getLength() );
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aChucker << CENSIG;
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aChucker << rEntry.nVersion;
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aChucker << rEntry.nVersion;
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if (rEntry.nFlag & (1 << 4) )
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{
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// If it's an encrypted entry, we pretend its stored plain text
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ZipEntry *pEntry = const_cast < ZipEntry * > ( &rEntry );
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pEntry->nFlag &= ~(1 <<4 );
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aChucker << rEntry.nFlag;
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aChucker << static_cast < sal_Int16 > ( STORED );
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}
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else
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{
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aChucker << rEntry.nFlag;
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aChucker << rEntry.nMethod;
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}
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aChucker << static_cast < sal_uInt32> ( rEntry.nTime );
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aChucker << static_cast < sal_uInt32> ( rEntry.nCrc );
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aChucker << rEntry.nCompressedSize;
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aChucker << rEntry.nSize;
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aChucker << nNameLength;
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aChucker << static_cast < sal_Int16> (0);
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aChucker << static_cast < sal_Int16> (0);
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aChucker << static_cast < sal_Int16> (0);
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aChucker << static_cast < sal_Int16> (0);
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aChucker << static_cast < sal_Int32> (0);
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aChucker << rEntry.nOffset;
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const sal_Unicode *pChar = rEntry.sName.getStr();
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Sequence < sal_Int8 > aSequence (nNameLength);
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sal_Int8 *pArray = aSequence.getArray();
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VOS_ENSURE ( Impl_IsValidChar ( pChar, nNameLength, sal_True ), "Non US ASCII character in zipentry name!");
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for ( sal_Int16 i = 0; i < nNameLength; i++)
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pArray[i] = static_cast < const sal_Int8 > (pChar[i]);
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aChucker.writeBytes( aSequence, nNameLength, pArray );
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}
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void ZipOutputStream::writeEXT( const ZipEntry &rEntry )
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throw(IOException, RuntimeException)
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{
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aChucker << EXTSIG;
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aChucker << static_cast < sal_uInt32> ( rEntry.nCrc );
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aChucker << rEntry.nCompressedSize;
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aChucker << rEntry.nSize;
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}
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sal_Int32 ZipOutputStream::writeLOC( const ZipEntry &rEntry )
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throw(IOException, RuntimeException)
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{
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sal_Int16 nNameLength = static_cast < sal_Int16 > (rEntry.sName.getLength());
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Sequence < sal_Int8 > aSequence(nNameLength);
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sal_Int8 *pArray = aSequence.getArray();
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aChucker << LOCSIG;
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aChucker << rEntry.nVersion;
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if (rEntry.nFlag & (1 << 4) )
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{
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// If it's an encrypted entry, we pretend its stored plain text
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sal_Int16 nTmpFlag = rEntry.nFlag;
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nTmpFlag &= ~(1 <<4 );
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aChucker << nTmpFlag;
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aChucker << static_cast < sal_Int16 > ( STORED );
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}
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else
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{
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aChucker << rEntry.nFlag;
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aChucker << rEntry.nMethod;
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}
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aChucker << static_cast < sal_uInt32 > (rEntry.nTime);
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if ((rEntry.nFlag & 8) == 8 )
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{
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aChucker << static_cast < sal_Int32 > (0);
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aChucker << static_cast < sal_Int32 > (0);
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aChucker << static_cast < sal_Int32 > (0);
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}
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else
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{
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aChucker << static_cast < sal_uInt32 > (rEntry.nCrc);
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aChucker << rEntry.nCompressedSize;
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aChucker << rEntry.nSize;
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}
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aChucker << nNameLength;
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aChucker << static_cast < sal_Int16 > (0);
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const sal_Unicode *pChar = rEntry.sName.getStr();
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VOS_ENSURE ( Impl_IsValidChar ( pChar, nNameLength, sal_True ), "Non US ASCII character in zipentry name!");
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for ( sal_Int16 i = 0; i < nNameLength; i++)
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pArray[i] = static_cast < const sal_Int8 > (pChar[i]);
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aChucker.writeBytes( aSequence, nNameLength, pArray );
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return LOCHDR + nNameLength;
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}
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sal_uInt32 ZipOutputStream::getCurrentDosTime( )
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{
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oslDateTime aDateTime;
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TimeValue aTimeValue;
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osl_getSystemTime ( &aTimeValue );
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osl_getDateTimeFromTimeValue( &aTimeValue, &aDateTime);
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sal_uInt32 nYear = static_cast <sal_uInt32> (aDateTime.Year);
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if (nYear>1980)
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nYear-=1980;
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else if (nYear>80)
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nYear-=80;
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sal_uInt32 nResult = static_cast < sal_uInt32>( ( ( ( aDateTime.Day) +
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( 32 * (aDateTime.Month)) +
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( 512 * nYear ) ) << 16) |
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( ( aDateTime.Seconds/2) +
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( 32 * aDateTime.Minutes) +
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( 2048 * static_cast <sal_uInt32 > (aDateTime.Hours) ) ) );
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return nResult;
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}
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/*
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This is actually never used, so I removed it, but thought that the
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implementation details may be useful in the future...mtg 20010307
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I stopped using the time library and used the OSL version instead, but
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it might still be useful to have this code here..
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void ZipOutputStream::dosDateToTMDate ( tm &rTime, sal_uInt32 nDosDate)
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{
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sal_uInt32 nDate = static_cast < sal_uInt32 > (nDosDate >> 16);
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rTime.tm_mday = static_cast < sal_uInt32 > ( nDate & 0x1F);
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rTime.tm_mon = static_cast < sal_uInt32 > ( ( ( (nDate) & 0x1E0)/0x20)-1);
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rTime.tm_year = static_cast < sal_uInt32 > ( ( (nDate & 0x0FE00)/0x0200)+1980);
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rTime.tm_hour = static_cast < sal_uInt32 > ( (nDosDate & 0xF800)/0x800);
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rTime.tm_min = static_cast < sal_uInt32 > ( (nDosDate & 0x7E0)/0x20);
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rTime.tm_sec = static_cast < sal_uInt32 > ( 2 * (nDosDate & 0x1F) );
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}
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*/
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