1040 lines
40 KiB
C++
1040 lines
40 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: ZipFile.cxx,v $
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*
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* $Revision: 1.43 $
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*
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* last change: $Author: rt $ $Date: 2005-09-08 16:15:32 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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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 2005 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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#ifndef _ZIP_FILE_HXX
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#include <ZipFile.hxx>
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#endif
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#ifndef _ZIP_ENUMERATION_HXX
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#include <ZipEnumeration.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 _RTL_CIPHER_H_
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#include <rtl/cipher.h>
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#endif
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#ifndef _RTL_DIGEST_H_
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#include <rtl/digest.h>
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#endif
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/*
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#ifndef _XMEMORY_STREAM_HXX
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#include <XMemoryStream.hxx>
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#endif
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#ifndef _XFILE_STREAM_HXX
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#include <XFileStream.hxx>
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#endif
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*/
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#ifndef _XUNBUFFERED_STREAM_HXX
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#include <XUnbufferedStream.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 _ENCRYPTED_DATA_HEADER_HXX_
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#include <EncryptedDataHeader.hxx>
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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 _MEMORY_BYTE_GRABBER_HXX_
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#include <MemoryByteGrabber.hxx>
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#endif
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#ifndef _COM_SUN_STAR_LANG_XMULTISERVICEFACTORY_HPP_
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#include <com/sun/star/lang/XMultiServiceFactory.hpp>
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#endif
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#ifndef _COM_SUN_STAR_UCB_XPROGRESSHANDLER_HPP_
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#include <com/sun/star/ucb/XProgressHandler.hpp>
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#endif
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#ifndef _CRC32_HXX_
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#include <CRC32.hxx>
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#endif
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#include <string.h> // for memcpy
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#include <vector>
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using namespace vos;
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using namespace rtl;
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using namespace com::sun::star;
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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::ucb;
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using namespace com::sun::star::lang;
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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 read entries from a zip file
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*/
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ZipFile::ZipFile( Reference < XInputStream > &xInput, const Reference < XMultiServiceFactory > &xNewFactory, sal_Bool bInitialise )
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throw(IOException, ZipException, RuntimeException)
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: xStream(xInput)
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, xSeek(xInput, UNO_QUERY)
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, aGrabber(xInput)
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, aInflater (sal_True)
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, xFactory ( xNewFactory )
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, bRecoveryMode( sal_False )
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{
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if (bInitialise)
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{
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if ( readCEN() == -1 )
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{
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aEntries.clear();
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throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "stream data looks to be broken" ) ), Reference < XInterface > () );
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}
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}
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}
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ZipFile::ZipFile( Reference < XInputStream > &xInput, const Reference < XMultiServiceFactory > &xNewFactory, sal_Bool bInitialise, sal_Bool bForceRecovery, Reference < XProgressHandler > xProgress )
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throw(IOException, ZipException, RuntimeException)
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: xStream(xInput)
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, xSeek(xInput, UNO_QUERY)
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, aGrabber(xInput)
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, aInflater (sal_True)
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, xFactory ( xNewFactory )
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, xProgressHandler( xProgress )
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, bRecoveryMode( bForceRecovery )
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{
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if (bInitialise)
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{
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if ( bForceRecovery )
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{
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recover();
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}
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else if ( readCEN() == -1 )
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{
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aEntries.clear();
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throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "stream data looks to be broken" ) ), Reference < XInterface > () );
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}
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}
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}
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ZipFile::~ZipFile()
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{
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aEntries.clear();
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}
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void ZipFile::setInputStream ( Reference < XInputStream > xNewStream )
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{
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xStream = xNewStream;
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xSeek = Reference < XSeekable > ( xStream, UNO_QUERY );
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aGrabber.setInputStream ( xStream );
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}
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void ZipFile::StaticGetCipher ( const ORef < EncryptionData > & xEncryptionData, rtlCipher &rCipher )
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{
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if ( ! xEncryptionData.isEmpty() )
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{
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Sequence < sal_uInt8 > aDerivedKey (16);
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rtlCipherError aResult;
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Sequence < sal_Int8 > aDecryptBuffer;
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// Get the key
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rtl_digest_PBKDF2 ( aDerivedKey.getArray(), 16,
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reinterpret_cast < const sal_uInt8 * > (xEncryptionData->aKey.getConstArray() ),
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xEncryptionData->aKey.getLength(),
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reinterpret_cast < const sal_uInt8 * > ( xEncryptionData->aSalt.getConstArray() ),
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xEncryptionData->aSalt.getLength(),
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xEncryptionData->nIterationCount );
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rCipher = rtl_cipher_create (rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream);
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aResult = rtl_cipher_init( rCipher, rtl_Cipher_DirectionDecode,
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aDerivedKey.getConstArray(),
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aDerivedKey.getLength(),
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reinterpret_cast < const sal_uInt8 * > ( xEncryptionData->aInitVector.getConstArray() ),
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xEncryptionData->aInitVector.getLength());
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OSL_ASSERT (aResult == rtl_Cipher_E_None);
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}
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}
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void ZipFile::StaticFillHeader ( const ORef < EncryptionData > & rData,
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sal_Int32 nSize,
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const ::rtl::OUString& aMediaType,
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sal_Int8 * & pHeader )
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{
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// I think it's safe to restrict vector and salt length to 2 bytes !
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sal_Int16 nIVLength = static_cast < sal_Int16 > ( rData->aInitVector.getLength() );
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sal_Int16 nSaltLength = static_cast < sal_Int16 > ( rData->aSalt.getLength() );
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sal_Int16 nDigestLength = static_cast < sal_Int16 > ( rData->aDigest.getLength() );
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sal_Int16 nMediaTypeLength = static_cast < sal_Int16 > ( aMediaType.getLength() * sizeof( sal_Unicode ) );
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// First the header
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*(pHeader++) = ( n_ConstHeader >> 0 ) & 0xFF;
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*(pHeader++) = ( n_ConstHeader >> 8 ) & 0xFF;
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*(pHeader++) = ( n_ConstHeader >> 16 ) & 0xFF;
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*(pHeader++) = ( n_ConstHeader >> 24 ) & 0xFF;
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// Then the version
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*(pHeader++) = ( n_ConstCurrentVersion >> 0 ) & 0xFF;
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*(pHeader++) = ( n_ConstCurrentVersion >> 8 ) & 0xFF;
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// Then the iteration Count
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sal_Int32 nIterationCount = rData->nIterationCount;
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*(pHeader++) = ( nIterationCount >> 0 ) & 0xFF;
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*(pHeader++) = ( nIterationCount >> 8 ) & 0xFF;
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*(pHeader++) = ( nIterationCount >> 16 ) & 0xFF;
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*(pHeader++) = ( nIterationCount >> 24 ) & 0xFF;
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// Then the size
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*(pHeader++) = ( nSize >> 0 ) & 0xFF;
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*(pHeader++) = ( nSize >> 8 ) & 0xFF;
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*(pHeader++) = ( nSize >> 16 ) & 0xFF;
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*(pHeader++) = ( nSize >> 24 ) & 0xFF;
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// Then the salt length
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*(pHeader++) = ( nSaltLength >> 0 ) & 0xFF;
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*(pHeader++) = ( nSaltLength >> 8 ) & 0xFF;
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// Then the IV length
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*(pHeader++) = ( nIVLength >> 0 ) & 0xFF;
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*(pHeader++) = ( nIVLength >> 8 ) & 0xFF;
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// Then the digest length
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*(pHeader++) = ( nDigestLength >> 0 ) & 0xFF;
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*(pHeader++) = ( nDigestLength >> 8 ) & 0xFF;
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// Then the mediatype length
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*(pHeader++) = ( nMediaTypeLength >> 0 ) & 0xFF;
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*(pHeader++) = ( nMediaTypeLength >> 8 ) & 0xFF;
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// Then the salt content
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memcpy ( pHeader, rData->aSalt.getConstArray(), nSaltLength );
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pHeader += nSaltLength;
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// Then the IV content
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memcpy ( pHeader, rData->aInitVector.getConstArray(), nIVLength );
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pHeader += nIVLength;
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// Then the digest content
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memcpy ( pHeader, rData->aDigest.getConstArray(), nDigestLength );
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pHeader += nDigestLength;
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// Then the mediatype itself
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memcpy ( pHeader, aMediaType.getStr(), nMediaTypeLength );
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pHeader += nMediaTypeLength;
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}
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sal_Bool ZipFile::StaticFillData ( ORef < EncryptionData > & rData,
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sal_Int32 &rSize,
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::rtl::OUString& aMediaType,
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Reference < XInputStream > &rStream )
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{
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sal_Bool bOk = sal_False;
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const sal_Int32 nHeaderSize = n_ConstHeaderSize - 4;
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Sequence < sal_Int8 > aBuffer ( nHeaderSize );
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if ( nHeaderSize == rStream->readBytes ( aBuffer, nHeaderSize ) )
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{
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sal_Int16 nPos = 0;
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sal_Int8 *pBuffer = aBuffer.getArray();
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sal_Int16 nVersion = pBuffer[nPos++] & 0xFF;
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nVersion |= ( pBuffer[nPos++] & 0xFF ) << 8;
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if ( nVersion == n_ConstCurrentVersion )
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{
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sal_Int32 nCount = pBuffer[nPos++] & 0xFF;
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nCount |= ( pBuffer[nPos++] & 0xFF ) << 8;
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nCount |= ( pBuffer[nPos++] & 0xFF ) << 16;
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nCount |= ( pBuffer[nPos++] & 0xFF ) << 24;
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rData->nIterationCount = nCount;
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rSize = pBuffer[nPos++] & 0xFF;
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rSize |= ( pBuffer[nPos++] & 0xFF ) << 8;
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rSize |= ( pBuffer[nPos++] & 0xFF ) << 16;
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rSize |= ( pBuffer[nPos++] & 0xFF ) << 24;
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sal_Int16 nSaltLength = pBuffer[nPos++] & 0xFF;
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nSaltLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
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sal_Int16 nIVLength = ( pBuffer[nPos++] & 0xFF );
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nIVLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
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sal_Int16 nDigestLength = pBuffer[nPos++] & 0xFF;
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nDigestLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
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sal_Int16 nMediaTypeLength = pBuffer[nPos++] & 0xFF;
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nMediaTypeLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
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if ( nSaltLength == rStream->readBytes ( aBuffer, nSaltLength ) )
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{
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rData->aSalt.realloc ( nSaltLength );
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memcpy ( rData->aSalt.getArray(), aBuffer.getConstArray(), nSaltLength );
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if ( nIVLength == rStream->readBytes ( aBuffer, nIVLength ) )
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{
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rData->aInitVector.realloc ( nIVLength );
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memcpy ( rData->aInitVector.getArray(), aBuffer.getConstArray(), nIVLength );
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if ( nDigestLength == rStream->readBytes ( aBuffer, nDigestLength ) )
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{
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rData->aDigest.realloc ( nDigestLength );
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memcpy ( rData->aDigest.getArray(), aBuffer.getConstArray(), nDigestLength );
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if ( nMediaTypeLength == rStream->readBytes ( aBuffer, nMediaTypeLength ) )
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{
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aMediaType = ::rtl::OUString( (sal_Unicode*)aBuffer.getConstArray(),
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nMediaTypeLength / sizeof( sal_Unicode ) );
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bOk = sal_True;
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}
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}
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}
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}
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}
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}
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return bOk;
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}
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Reference< XInputStream > ZipFile::StaticGetDataFromRawStream( const Reference< XInputStream >& xStream,
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const ORef < EncryptionData > &rData )
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throw ( packages::WrongPasswordException, ZipIOException, RuntimeException )
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{
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if ( rData.isEmpty() )
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throw ZipIOException( OUString::createFromAscii( "Encrypted stream without encryption data!\n" ),
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Reference< XInterface >() );
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if ( !rData->aKey.getLength() )
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throw packages::WrongPasswordException();
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Reference< XSeekable > xSeek( xStream, UNO_QUERY );
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if ( !xSeek.is() )
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throw ZipIOException( OUString::createFromAscii( "The stream must be seekable!\n" ),
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Reference< XInterface >() );
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// if we have a digest, then this file is an encrypted one and we should
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// check if we can decrypt it or not
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OSL_ENSURE( rData->aDigest.getLength(), "Can't detect password correctness without digest!\n" );
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if ( rData->aDigest.getLength() )
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{
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sal_Int32 nSize = xSeek->getLength();
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nSize = nSize > n_ConstDigestLength ? n_ConstDigestLength : nSize;
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// skip header
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xSeek->seek( n_ConstHeaderSize + rData->aInitVector.getLength() +
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rData->aSalt.getLength() + rData->aDigest.getLength() );
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// Only want to read enough to verify the digest
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Sequence < sal_Int8 > aReadBuffer ( nSize );
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xStream->readBytes( aReadBuffer, nSize );
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if ( !StaticHasValidPassword( aReadBuffer, rData ) )
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throw packages::WrongPasswordException();
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}
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return new XUnbufferedStream ( xStream, rData );
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}
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sal_Bool ZipFile::StaticHasValidPassword( const Sequence< sal_Int8 > &aReadBuffer, const ORef < EncryptionData > &rData )
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{
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if ( !rData.isValid() || !rData->aKey.getLength() )
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return sal_False;
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sal_Bool bRet = sal_False;
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sal_Int32 nSize = aReadBuffer.getLength();
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// make a temporary cipher
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rtlCipher aCipher;
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StaticGetCipher ( rData, aCipher );
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Sequence < sal_Int8 > aDecryptBuffer ( nSize );
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rtlDigest aDigest = rtl_digest_createSHA1();
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rtlDigestError aDigestResult;
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Sequence < sal_uInt8 > aDigestSeq ( RTL_DIGEST_LENGTH_SHA1 );
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rtlCipherError aResult = rtl_cipher_decode ( aCipher,
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aReadBuffer.getConstArray(),
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nSize,
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reinterpret_cast < sal_uInt8 * > (aDecryptBuffer.getArray()),
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nSize);
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OSL_ASSERT (aResult == rtl_Cipher_E_None);
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aDigestResult = rtl_digest_updateSHA1 ( aDigest,
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static_cast < const void * > ( aDecryptBuffer.getConstArray() ), nSize );
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OSL_ASSERT ( aDigestResult == rtl_Digest_E_None );
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aDigestResult = rtl_digest_getSHA1 ( aDigest, aDigestSeq.getArray(), RTL_DIGEST_LENGTH_SHA1 );
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OSL_ASSERT ( aDigestResult == rtl_Digest_E_None );
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// If we don't have a digest, then we have to assume that the password is correct
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if ( rData->aDigest.getLength() != 0 &&
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( aDigestSeq.getLength() != rData->aDigest.getLength() ||
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0 != rtl_compareMemory ( aDigestSeq.getConstArray(),
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rData->aDigest.getConstArray(),
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aDigestSeq.getLength() ) ) )
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{
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// We should probably tell the user that the password they entered was wrong
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}
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else
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bRet = sal_True;
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rtl_digest_destroySHA1 ( aDigest );
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return bRet;
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}
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sal_Bool ZipFile::hasValidPassword ( ZipEntry & rEntry, const ORef < EncryptionData > &rData )
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{
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sal_Bool bRet = sal_False;
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if ( rData->aKey.getLength() )
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{
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xSeek->seek( rEntry.nOffset );
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sal_Int32 nSize = rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize;
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// Only want to read enough to verify the digest
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nSize = nSize > n_ConstDigestLength ? n_ConstDigestLength : nSize;
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Sequence < sal_Int8 > aReadBuffer ( nSize );
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xStream->readBytes( aReadBuffer, nSize );
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bRet = StaticHasValidPassword( aReadBuffer, rData );
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}
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return bRet;
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}
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#if 0
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Reference < XInputStream > ZipFile::createFileStream(
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ZipEntry & rEntry,
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const ORef < EncryptionData > &rData,
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sal_Bool bRawStream,
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sal_Bool bIsEncrypted )
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{
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static OUString sServiceName ( RTL_CONSTASCII_USTRINGPARAM ( "com.sun.star.io.TempFile" ) );
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Reference < XInputStream > xTempStream = Reference < XInputStream > ( xFactory->createInstance ( sServiceName ), UNO_QUERY );
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return new XFileStream ( rEntry, xStream, xTempStream, rData, bRawStream, bIsEncrypted );
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}
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Reference < XInputStream > ZipFile::createMemoryStream(
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ZipEntry & rEntry,
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const ORef < EncryptionData > &rData,
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sal_Bool bRawStream,
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sal_Bool bIsEncrypted )
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{
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sal_Int32 nUncompressedSize, nEnd;
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if (bRawStream)
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{
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nUncompressedSize = rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize;
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nEnd = rEntry.nOffset + nUncompressedSize;
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}
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else
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{
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nUncompressedSize = rEntry.nSize;
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nEnd = rEntry.nMethod == DEFLATED ? rEntry.nOffset + rEntry.nCompressedSize : rEntry.nOffset + rEntry.nSize;
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}
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sal_Int32 nSize = rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize;
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Sequence < sal_Int8 > aReadBuffer ( nSize ), aDecryptBuffer, aWriteBuffer;
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rtlCipher aCipher;
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// If the encryption key is zero, we need to return the raw stream. First check if
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// we have the salt. If we have the salt, then check if we have the encryption key
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// if not, return rawStream instead.
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|
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sal_Bool bHaveEncryptData = ( !rData.isEmpty() && rData->aSalt.getLength() && rData->aInitVector.getLength() && rData->nIterationCount != 0 ) ? sal_True : sal_False;
|
|
sal_Bool bMustDecrypt = ( !bRawStream && bHaveEncryptData && bIsEncrypted ) ? sal_True : sal_False;
|
|
|
|
if ( bMustDecrypt )
|
|
{
|
|
StaticGetCipher ( rData, aCipher );
|
|
aDecryptBuffer.realloc ( nSize );
|
|
}
|
|
|
|
if ( nSize <0 )
|
|
throw IOException ( );
|
|
|
|
xSeek->seek( rEntry.nOffset );
|
|
xStream->readBytes( aReadBuffer, nSize ); // Now it holds the raw stuff from disk
|
|
|
|
if ( bMustDecrypt )
|
|
{
|
|
rtlCipherError aResult = rtl_cipher_decode ( aCipher,
|
|
aReadBuffer.getConstArray(),
|
|
nSize,
|
|
reinterpret_cast < sal_uInt8 * > (aDecryptBuffer.getArray()),
|
|
nSize);
|
|
OSL_ASSERT (aResult == rtl_Cipher_E_None);
|
|
aReadBuffer = aDecryptBuffer; // Now it holds the decrypted data
|
|
}
|
|
if (bRawStream || rEntry.nMethod == STORED)
|
|
aWriteBuffer = aReadBuffer; // bRawStream means the caller doesn't want it decompressed
|
|
else
|
|
{
|
|
aInflater.setInputSegment( aReadBuffer, 0, nSize );
|
|
aWriteBuffer.realloc( nUncompressedSize );
|
|
aInflater.doInflate( aWriteBuffer );
|
|
aInflater.reset();
|
|
}
|
|
|
|
if ( bHaveEncryptData && !bMustDecrypt && bIsEncrypted )
|
|
{
|
|
// if we have the data needed to decrypt it, but didn't want it decrypted (or
|
|
// we couldn't decrypt it due to wrong password), then we prepend this
|
|
// data to the stream
|
|
|
|
// Make a buffer big enough to hold both the header and the data itself
|
|
Sequence < sal_Int8 > aEncryptedDataHeader ( n_ConstHeaderSize +
|
|
rData->aInitVector.getLength() +
|
|
rData->aSalt.getLength() +
|
|
rData->aDigest.getLength() +
|
|
aWriteBuffer.getLength() );
|
|
sal_Int8 * pHeader = aEncryptedDataHeader.getArray();
|
|
StaticFillHeader ( rData, rEntry.nSize, pHeader );
|
|
memcpy ( pHeader, aWriteBuffer.getConstArray(), aWriteBuffer.getLength() );
|
|
|
|
// dump old buffer and point aWriteBuffer to the new one with the header
|
|
aWriteBuffer = aEncryptedDataHeader;
|
|
}
|
|
return Reference < XInputStream > ( new XMemoryStream ( aWriteBuffer ) );
|
|
}
|
|
#endif
|
|
Reference < XInputStream > ZipFile::createUnbufferedStream(
|
|
ZipEntry & rEntry,
|
|
const ORef < EncryptionData > &rData,
|
|
sal_Int8 nStreamMode,
|
|
sal_Bool bIsEncrypted,
|
|
::rtl::OUString aMediaType )
|
|
{
|
|
return new XUnbufferedStream ( rEntry, xStream, rData, nStreamMode, bIsEncrypted, aMediaType, bRecoveryMode );
|
|
}
|
|
|
|
|
|
ZipEnumeration * SAL_CALL ZipFile::entries( )
|
|
{
|
|
return new ZipEnumeration ( aEntries );
|
|
}
|
|
|
|
::rtl::OUString SAL_CALL ZipFile::getName( )
|
|
throw(RuntimeException)
|
|
{
|
|
return sName;
|
|
}
|
|
|
|
sal_Int32 SAL_CALL ZipFile::getSize( )
|
|
throw(RuntimeException)
|
|
{
|
|
return aEntries.size();
|
|
}
|
|
|
|
Reference< XInputStream > SAL_CALL ZipFile::getInputStream( ZipEntry& rEntry,
|
|
const vos::ORef < EncryptionData > &rData,
|
|
sal_Bool bIsEncrypted )
|
|
throw(IOException, ZipException, RuntimeException)
|
|
{
|
|
if ( rEntry.nOffset <= 0 )
|
|
readLOC( rEntry );
|
|
|
|
// We want to return a rawStream if we either don't have a key or if the
|
|
// key is wrong
|
|
|
|
sal_Bool bNeedRawStream = rEntry.nMethod == STORED;
|
|
|
|
// if we have a digest, then this file is an encrypted one and we should
|
|
// check if we can decrypt it or not
|
|
if ( bIsEncrypted && !rData.isEmpty() && rData->aDigest.getLength() )
|
|
bNeedRawStream = !hasValidPassword ( rEntry, rData );
|
|
|
|
return createUnbufferedStream ( rEntry,
|
|
rData,
|
|
bNeedRawStream ? UNBUFF_STREAM_RAW : UNBUFF_STREAM_DATA,
|
|
bIsEncrypted );
|
|
}
|
|
|
|
Reference< XInputStream > SAL_CALL ZipFile::getDataStream( ZipEntry& rEntry,
|
|
const vos::ORef < EncryptionData > &rData,
|
|
sal_Bool bIsEncrypted )
|
|
throw ( packages::WrongPasswordException,
|
|
IOException,
|
|
ZipException,
|
|
RuntimeException )
|
|
{
|
|
if ( rEntry.nOffset <= 0 )
|
|
readLOC( rEntry );
|
|
|
|
// An exception must be thrown in case stream is encrypted and
|
|
// there is no key or the key is wrong
|
|
sal_Bool bNeedRawStream = sal_False;
|
|
if ( bIsEncrypted )
|
|
{
|
|
// in case no digest is provided there is no way
|
|
// to detect password correctness
|
|
if ( rData.isEmpty() )
|
|
throw ZipException( OUString::createFromAscii( "Encrypted stream without encryption data!\n" ),
|
|
Reference< XInterface >() );
|
|
|
|
// if we have a digest, then this file is an encrypted one and we should
|
|
// check if we can decrypt it or not
|
|
OSL_ENSURE( rData->aDigest.getLength(), "Can't detect password correctness without digest!\n" );
|
|
if ( rData->aDigest.getLength() && !hasValidPassword ( rEntry, rData ) )
|
|
throw packages::WrongPasswordException();
|
|
}
|
|
else
|
|
bNeedRawStream = ( rEntry.nMethod == STORED );
|
|
|
|
return createUnbufferedStream ( rEntry,
|
|
rData,
|
|
bNeedRawStream ? UNBUFF_STREAM_RAW : UNBUFF_STREAM_DATA,
|
|
bIsEncrypted );
|
|
}
|
|
|
|
Reference< XInputStream > SAL_CALL ZipFile::getRawData( ZipEntry& rEntry,
|
|
const vos::ORef < EncryptionData > &rData,
|
|
sal_Bool bIsEncrypted )
|
|
throw(IOException, ZipException, RuntimeException)
|
|
{
|
|
if ( rEntry.nOffset <= 0 )
|
|
readLOC( rEntry );
|
|
|
|
return createUnbufferedStream ( rEntry, rData, UNBUFF_STREAM_RAW, bIsEncrypted );
|
|
}
|
|
|
|
Reference< XInputStream > SAL_CALL ZipFile::getWrappedRawStream(
|
|
ZipEntry& rEntry,
|
|
const vos::ORef < EncryptionData > &rData,
|
|
const ::rtl::OUString& aMediaType )
|
|
throw ( packages::NoEncryptionException,
|
|
IOException,
|
|
ZipException,
|
|
RuntimeException )
|
|
{
|
|
if ( rData.isEmpty() )
|
|
throw packages::NoEncryptionException();
|
|
|
|
if ( rEntry.nOffset <= 0 )
|
|
readLOC( rEntry );
|
|
|
|
return createUnbufferedStream ( rEntry, rData, UNBUFF_STREAM_WRAPPEDRAW, sal_True, aMediaType );
|
|
}
|
|
|
|
sal_Bool ZipFile::readLOC( ZipEntry &rEntry )
|
|
throw(IOException, ZipException, RuntimeException)
|
|
{
|
|
sal_Int32 nTestSig, nTime, nCRC, nSize, nCompressedSize;
|
|
sal_Int16 nVersion, nFlag, nHow, nNameLen, nExtraLen;
|
|
sal_Int32 nPos = -rEntry.nOffset;
|
|
|
|
aGrabber.seek(nPos);
|
|
aGrabber >> nTestSig;
|
|
|
|
if (nTestSig != LOCSIG)
|
|
throw ZipIOException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid LOC header (bad signature") ), Reference < XInterface > () );
|
|
aGrabber >> nVersion;
|
|
aGrabber >> nFlag;
|
|
aGrabber >> nHow;
|
|
aGrabber >> nTime;
|
|
aGrabber >> nCRC;
|
|
aGrabber >> nCompressedSize;
|
|
aGrabber >> nSize;
|
|
aGrabber >> nNameLen;
|
|
aGrabber >> nExtraLen;
|
|
rEntry.nOffset = static_cast < sal_Int32 > (aGrabber.getPosition()) + nNameLen + nExtraLen;
|
|
|
|
if ( rEntry.nNameLen == -1 ) // the file was created
|
|
rEntry.nNameLen = nNameLen;
|
|
|
|
// the method can be reset for internal use so it is not checked
|
|
sal_Bool bBroken = rEntry.nVersion != nVersion
|
|
|| rEntry.nFlag != nFlag
|
|
|| rEntry.nTime != nTime
|
|
|| rEntry.nNameLen != nNameLen;
|
|
|
|
if ( bBroken && !bRecoveryMode )
|
|
throw ZipIOException( OUString( RTL_CONSTASCII_USTRINGPARAM( "The stream seems to be broken!" ) ),
|
|
Reference< XInterface >() );
|
|
|
|
return sal_True;
|
|
}
|
|
|
|
sal_Int32 ZipFile::findEND( )
|
|
throw(IOException, ZipException, RuntimeException)
|
|
{
|
|
sal_Int32 nLength, nPos, nEnd;
|
|
Sequence < sal_Int8 > aBuffer;
|
|
try
|
|
{
|
|
nLength = static_cast <sal_Int32 > (aGrabber.getLength());
|
|
if (nLength == 0 || nLength < ENDHDR)
|
|
return -1;
|
|
nPos = nLength - ENDHDR - ZIP_MAXNAMELEN;
|
|
nEnd = nPos >= 0 ? nPos : 0 ;
|
|
|
|
aGrabber.seek( nEnd );
|
|
aGrabber.readBytes ( aBuffer, nLength - nEnd );
|
|
|
|
const sal_Int8 *pBuffer = aBuffer.getConstArray();
|
|
|
|
nPos = nLength - nEnd - ENDHDR;
|
|
while ( nPos >= 0 )
|
|
{
|
|
if (pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 5 && pBuffer[nPos+3] == 6 )
|
|
return nPos + nEnd;
|
|
nPos--;
|
|
}
|
|
}
|
|
catch ( IllegalArgumentException& )
|
|
{
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
catch ( NotConnectedException& )
|
|
{
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
catch ( BufferSizeExceededException& )
|
|
{
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
|
|
sal_Int32 ZipFile::readCEN()
|
|
throw(IOException, ZipException, RuntimeException)
|
|
{
|
|
sal_Int32 nCenLen, nCenPos = -1, nCenOff, nEndPos, nLocPos;
|
|
sal_uInt16 nCount, nTotal;
|
|
|
|
try
|
|
{
|
|
nEndPos = findEND();
|
|
if (nEndPos == -1)
|
|
return -1;
|
|
aGrabber.seek(nEndPos + ENDTOT);
|
|
aGrabber >> nTotal;
|
|
aGrabber >> nCenLen;
|
|
aGrabber >> nCenOff;
|
|
|
|
if ( nTotal * CENHDR > nCenLen )
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "invalid END header (bad entry count)") ), Reference < XInterface > () );
|
|
|
|
if ( nTotal > ZIP_MAXENTRIES )
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "too many entries in ZIP File") ), Reference < XInterface > () );
|
|
|
|
if ( nCenLen < 0 || nCenLen > nEndPos )
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid END header (bad central directory size)") ), Reference < XInterface > () );
|
|
|
|
nCenPos = nEndPos - nCenLen;
|
|
|
|
if ( nCenOff < 0 || nCenOff > nCenPos )
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid END header (bad central directory size)") ), Reference < XInterface > () );
|
|
|
|
nLocPos = nCenPos - nCenOff;
|
|
aGrabber.seek( nCenPos );
|
|
Sequence < sal_Int8 > aCENBuffer ( nCenLen );
|
|
sal_Int64 nRead = aGrabber.readBytes ( aCENBuffer, nCenLen );
|
|
if ( static_cast < sal_Int64 > ( nCenLen ) != nRead )
|
|
throw ZipException ( OUString ( RTL_CONSTASCII_USTRINGPARAM ( "Error reading CEN into memory buffer!") ), Reference < XInterface > () );
|
|
|
|
MemoryByteGrabber aMemGrabber ( aCENBuffer );
|
|
|
|
ZipEntry aEntry;
|
|
sal_Int32 nTestSig;
|
|
sal_Int16 nCommentLen;
|
|
|
|
for (nCount = 0 ; nCount < nTotal; nCount++)
|
|
{
|
|
aMemGrabber >> nTestSig;
|
|
if ( nTestSig != CENSIG )
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid CEN header (bad signature)") ), Reference < XInterface > () );
|
|
|
|
aMemGrabber.skipBytes ( 2 );
|
|
aMemGrabber >> aEntry.nVersion;
|
|
|
|
if ( ( aEntry.nVersion & 1 ) == 1 )
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid CEN header (encrypted entry)") ), Reference < XInterface > () );
|
|
|
|
aMemGrabber >> aEntry.nFlag;
|
|
aMemGrabber >> aEntry.nMethod;
|
|
|
|
if ( aEntry.nMethod != STORED && aEntry.nMethod != DEFLATED)
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid CEN header (bad compression method)") ), Reference < XInterface > () );
|
|
|
|
aMemGrabber >> aEntry.nTime;
|
|
aMemGrabber >> aEntry.nCrc;
|
|
aMemGrabber >> aEntry.nCompressedSize;
|
|
aMemGrabber >> aEntry.nSize;
|
|
aMemGrabber >> aEntry.nNameLen;
|
|
aMemGrabber >> aEntry.nExtraLen;
|
|
aMemGrabber >> nCommentLen;
|
|
aMemGrabber.skipBytes ( 8 );
|
|
aMemGrabber >> aEntry.nOffset;
|
|
|
|
aEntry.nOffset += nLocPos;
|
|
aEntry.nOffset *= -1;
|
|
|
|
if ( aEntry.nNameLen > ZIP_MAXNAMELEN )
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "name length exceeds ZIP_MAXNAMELEN bytes" ) ), Reference < XInterface > () );
|
|
|
|
if ( nCommentLen > ZIP_MAXNAMELEN )
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "comment length exceeds ZIP_MAXNAMELEN bytes" ) ), Reference < XInterface > () );
|
|
|
|
if ( aEntry.nExtraLen > ZIP_MAXEXTRA )
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "extra header info exceeds ZIP_MAXEXTRA bytes") ), Reference < XInterface > () );
|
|
|
|
aEntry.sName = OUString ( (sal_Char *) aMemGrabber.getCurrentPos(),
|
|
aEntry.nNameLen,
|
|
RTL_TEXTENCODING_ASCII_US);
|
|
|
|
aMemGrabber.skipBytes( aEntry.nNameLen + aEntry.nExtraLen + nCommentLen );
|
|
aEntries[aEntry.sName] = aEntry;
|
|
}
|
|
|
|
if (nCount != nTotal)
|
|
throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Count != Total") ), Reference < XInterface > () );
|
|
}
|
|
catch ( IllegalArgumentException & )
|
|
{
|
|
// seek can throw this...
|
|
nCenPos = -1; // make sure we return -1 to indicate an error
|
|
}
|
|
return nCenPos;
|
|
}
|
|
|
|
sal_Int32 ZipFile::recover()
|
|
throw(IOException, ZipException, RuntimeException)
|
|
{
|
|
sal_Int32 nLength;
|
|
Sequence < sal_Int8 > aBuffer;
|
|
Sequence < sal_Int32 > aHeaderOffsets;
|
|
sal_Int32 nNumOfHeaders = 0;
|
|
|
|
try
|
|
{
|
|
nLength = static_cast <sal_Int32 > (aGrabber.getLength());
|
|
if (nLength == 0 || nLength < ENDHDR)
|
|
return -1;
|
|
|
|
aGrabber.seek( 0 );
|
|
|
|
for( sal_Int32 nGenPos = 0; aGrabber.readBytes( aBuffer, 32000 ) && aBuffer.getLength() > 30; )
|
|
{
|
|
const sal_Int8 *pBuffer = aBuffer.getConstArray();
|
|
sal_Int32 nBufSize = aBuffer.getLength();
|
|
|
|
sal_Int32 nPos = 0;
|
|
while( nPos < nBufSize - 16 )
|
|
{
|
|
if ( nPos < nBufSize - 30 && pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 3 && pBuffer[nPos+3] == 4 )
|
|
{
|
|
ZipEntry aEntry;
|
|
MemoryByteGrabber aMemGrabber ( Sequence< sal_Int8 >( ((sal_Int8*)(&(pBuffer[nPos+4]))), 26 ) );
|
|
|
|
aMemGrabber >> aEntry.nVersion;
|
|
if ( ( aEntry.nVersion & 1 ) != 1 )
|
|
{
|
|
aMemGrabber >> aEntry.nFlag;
|
|
aMemGrabber >> aEntry.nMethod;
|
|
|
|
if ( aEntry.nMethod == STORED || aEntry.nMethod == DEFLATED )
|
|
{
|
|
aMemGrabber >> aEntry.nTime;
|
|
aMemGrabber >> aEntry.nCrc;
|
|
aMemGrabber >> aEntry.nCompressedSize;
|
|
aMemGrabber >> aEntry.nSize;
|
|
aMemGrabber >> aEntry.nNameLen;
|
|
aMemGrabber >> aEntry.nExtraLen;
|
|
|
|
sal_Int32 nDescrLength =
|
|
( aEntry.nMethod == DEFLATED && ( aEntry.nFlag & 8 ) ) ?
|
|
16 : 0;
|
|
|
|
|
|
// This is a quick fix for OOo1.1RC
|
|
// For OOo2.0 the whole package must be switched to unsigned values
|
|
if ( aEntry.nCompressedSize < 0 ) aEntry.nCompressedSize = 0x7FFFFFFF;
|
|
if ( aEntry.nSize < 0 ) aEntry.nSize = 0x7FFFFFFF;
|
|
if ( aEntry.nNameLen < 0 ) aEntry.nNameLen = 0x7FFF;
|
|
if ( aEntry.nExtraLen < 0 ) aEntry.nExtraLen = 0x7FFF;
|
|
// End of quick fix
|
|
|
|
|
|
sal_Int32 nBlockLength = aEntry.nSize + aEntry.nNameLen + aEntry.nExtraLen + 30 + nDescrLength;
|
|
if ( aEntry.nNameLen <= ZIP_MAXNAMELEN && aEntry.nExtraLen < ZIP_MAXEXTRA
|
|
&& ( nGenPos + nPos + nBlockLength ) <= nLength )
|
|
{
|
|
if( nPos + 30 + aEntry.nNameLen <= nBufSize )
|
|
aEntry.sName = OUString ( (sal_Char *) &pBuffer[nPos + 30],
|
|
aEntry.nNameLen,
|
|
RTL_TEXTENCODING_ASCII_US);
|
|
else
|
|
{
|
|
Sequence < sal_Int8 > aFileName;
|
|
aGrabber.seek( nGenPos + nPos + 30 );
|
|
aGrabber.readBytes( aFileName, aEntry.nNameLen );
|
|
aEntry.sName = OUString ( (sal_Char *) aFileName.getArray(),
|
|
aFileName.getLength(),
|
|
RTL_TEXTENCODING_ASCII_US);
|
|
aEntry.nNameLen = aFileName.getLength();
|
|
}
|
|
|
|
aEntry.nOffset = nGenPos + nPos + 30 + aEntry.nNameLen + aEntry.nExtraLen;
|
|
|
|
if ( ( aEntry.nSize || aEntry.nCompressedSize ) && !checkSizeAndCRC( aEntry ) )
|
|
{
|
|
aEntry.nCrc = 0;
|
|
aEntry.nCompressedSize = 0;
|
|
aEntry.nSize = 0;
|
|
}
|
|
|
|
if ( aEntries.find( aEntry.sName ) == aEntries.end() )
|
|
aEntries[aEntry.sName] = aEntry;
|
|
}
|
|
}
|
|
}
|
|
|
|
nPos += 4;
|
|
}
|
|
else if (pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 7 && pBuffer[nPos+3] == 8 )
|
|
{
|
|
sal_Int32 nCompressedSize, nSize, nCRC32;
|
|
MemoryByteGrabber aMemGrabber ( Sequence< sal_Int8 >( ((sal_Int8*)(&(pBuffer[nPos+4]))), 12 ) );
|
|
aMemGrabber >> nCRC32;
|
|
aMemGrabber >> nCompressedSize;
|
|
aMemGrabber >> nSize;
|
|
|
|
for( EntryHash::iterator aIter = aEntries.begin(); aIter != aEntries.end(); aIter++ )
|
|
{
|
|
ZipEntry aTmp = (*aIter).second;
|
|
if( (*aIter).second.nMethod == DEFLATED && (*aIter).second.nFlag & 8 )
|
|
{
|
|
sal_Int32 nStreamOffset = nGenPos + nPos - nCompressedSize;
|
|
sal_Int32 nTmp1 = (*aIter).second.nOffset;
|
|
if ( nStreamOffset == (*aIter).second.nOffset && nCompressedSize > (*aIter).second.nCompressedSize )
|
|
{
|
|
sal_Int32 nRealSize = 0, nRealCRC = 0;
|
|
getSizeAndCRC( nStreamOffset, nCompressedSize, &nRealSize, &nRealCRC );
|
|
if ( nRealSize == nSize && nRealCRC == nCRC32 )
|
|
{
|
|
(*aIter).second.nCrc = nCRC32;
|
|
(*aIter).second.nCompressedSize = nCompressedSize;
|
|
(*aIter).second.nSize = nSize;
|
|
}
|
|
}
|
|
#if 0
|
|
// for now ignore clearly broken streams
|
|
else if( !(*aIter).second.nCompressedSize )
|
|
{
|
|
(*aIter).second.nCrc = nCRC32;
|
|
sal_Int32 nRealStreamSize = nGenPos + nPos - (*aIter).second.nOffset;
|
|
(*aIter).second.nCompressedSize = nGenPos + nPos - (*aIter).second.nOffset;
|
|
(*aIter).second.nSize = nSize;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
nPos += 4;
|
|
}
|
|
else
|
|
nPos++;
|
|
}
|
|
|
|
nGenPos += nPos;
|
|
aGrabber.seek( nGenPos );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
catch ( IllegalArgumentException& )
|
|
{
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
catch ( NotConnectedException& )
|
|
{
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
catch ( BufferSizeExceededException& )
|
|
{
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
}
|
|
throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () );
|
|
|
|
}
|
|
|
|
sal_Bool ZipFile::checkSizeAndCRC( const ZipEntry& aEntry )
|
|
{
|
|
sal_Int32 nSize = 0, nCRC = 0;
|
|
|
|
if( aEntry.nMethod == STORED )
|
|
return ( getCRC( aEntry.nOffset, aEntry.nSize ) == aEntry.nCrc );
|
|
|
|
getSizeAndCRC( aEntry.nOffset, aEntry.nCompressedSize, &nSize, &nCRC );
|
|
return ( aEntry.nSize == nSize && aEntry.nCrc == nCRC );
|
|
}
|
|
|
|
sal_Int32 ZipFile::getCRC( sal_Int32 nOffset, sal_Int32 nSize )
|
|
{
|
|
Sequence < sal_Int8 > aBuffer;
|
|
CRC32 aCRC;
|
|
sal_Int32 nBlockSize = ::std::min( nSize, static_cast< sal_Int32 >( 32000 ) );
|
|
|
|
aGrabber.seek( nOffset );
|
|
for ( int ind = 0;
|
|
aGrabber.readBytes( aBuffer, nBlockSize ) && ind * nBlockSize < nSize;
|
|
ind++ )
|
|
{
|
|
aCRC.updateSegment( aBuffer, 0, ::std::min( nBlockSize, nSize - ind * nBlockSize ) );
|
|
}
|
|
|
|
return aCRC.getValue();
|
|
}
|
|
|
|
void ZipFile::getSizeAndCRC( sal_Int32 nOffset, sal_Int32 nCompressedSize, sal_Int32 *nSize, sal_Int32 *nCRC )
|
|
{
|
|
Sequence < sal_Int8 > aBuffer;
|
|
CRC32 aCRC;
|
|
sal_Int32 nRealSize = 0;
|
|
Inflater aInflater( sal_True );
|
|
sal_Int32 nBlockSize = ::std::min( nCompressedSize, static_cast< sal_Int32 >( 32000 ) );
|
|
|
|
aGrabber.seek( nOffset );
|
|
for ( int ind = 0;
|
|
!aInflater.finished() && aGrabber.readBytes( aBuffer, nBlockSize ) && ind * nBlockSize < nCompressedSize;
|
|
ind++ )
|
|
{
|
|
Sequence < sal_Int8 > aData( nBlockSize );
|
|
sal_Int32 nLastInflated = 0;
|
|
sal_Int32 nInBlock = 0;
|
|
|
|
aInflater.setInput( aBuffer );
|
|
do
|
|
{
|
|
nLastInflated = aInflater.doInflateSegment( aData, 0, nBlockSize );
|
|
aCRC.updateSegment( aData, 0, nLastInflated );
|
|
nInBlock += nLastInflated;
|
|
} while( !aInflater.finished() && nLastInflated );
|
|
|
|
nRealSize += nInBlock;
|
|
}
|
|
|
|
if( aInflater.finished() )
|
|
{
|
|
*nSize = nRealSize;
|
|
*nCRC = aCRC.getValue();
|
|
}
|
|
else
|
|
*nSize = *nCRC = 0;
|
|
|
|
}
|