795586aaf9
2008/04/01 15:22:24 thb 1.13.2.3: #i85898# Stripping all external header guards 2008/04/01 12:32:14 thb 1.13.2.2: #i85898# Stripping all external header guards 2008/03/31 16:19:09 rt 1.13.2.1: #i87441# Change license header to LPGL v3.
352 lines
14 KiB
C++
352 lines
14 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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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: XUnbufferedStream.cxx,v $
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* $Revision: 1.14 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_package.hxx"
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#include <XUnbufferedStream.hxx>
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#include <EncryptionData.hxx>
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#include <com/sun/star/packages/zip/ZipConstants.hpp>
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#include <com/sun/star/packages/zip/ZipIOException.hpp>
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#include <PackageConstants.hxx>
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#include <rtl/cipher.h>
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#include <ZipFile.hxx>
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#include <EncryptedDataHeader.hxx>
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#include <algorithm>
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#include <string.h>
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#if 0
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// for debugging purposes here
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#include <com/sun/star/ucb/XSimpleFileAccess.hpp>
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#include <comphelper/processfactory.hxx>
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using namespace ::com::sun::star;
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#endif
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using namespace com::sun::star::packages::zip::ZipConstants;
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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 com::sun::star::lang::IllegalArgumentException;
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using com::sun::star::packages::zip::ZipIOException;
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using ::rtl::OUString;
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XUnbufferedStream::XUnbufferedStream( ZipEntry & rEntry,
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Reference < XInputStream > xNewZipStream,
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const vos::ORef < EncryptionData > &rData,
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sal_Int8 nStreamMode,
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sal_Bool bIsEncrypted,
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const ::rtl::OUString& aMediaType,
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sal_Bool bRecoveryMode )
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: mxZipStream ( xNewZipStream )
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, mxZipSeek ( xNewZipStream, UNO_QUERY )
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, maEntry ( rEntry )
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, mxData ( rData )
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, maCipher ( NULL )
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, maInflater ( sal_True )
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, mbRawStream ( nStreamMode == UNBUFF_STREAM_RAW || nStreamMode == UNBUFF_STREAM_WRAPPEDRAW )
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, mbWrappedRaw ( nStreamMode == UNBUFF_STREAM_WRAPPEDRAW )
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, mbFinished ( sal_False )
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, mnHeaderToRead ( 0 )
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, mnZipCurrent ( 0 )
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, mnZipEnd ( 0 )
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, mnZipSize ( 0 )
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, mnMyCurrent ( 0 )
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, mbCheckCRC( !bRecoveryMode )
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{
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mnZipCurrent = maEntry.nOffset;
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if ( mbRawStream )
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{
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mnZipSize = maEntry.nMethod == DEFLATED ? maEntry.nCompressedSize : maEntry.nSize;
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mnZipEnd = maEntry.nOffset + mnZipSize;
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}
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else
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{
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mnZipSize = maEntry.nSize;
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mnZipEnd = maEntry.nMethod == DEFLATED ? maEntry.nOffset + maEntry.nCompressedSize : maEntry.nOffset + maEntry.nSize;
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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;
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sal_Bool bMustDecrypt = ( nStreamMode == UNBUFF_STREAM_DATA && bHaveEncryptData && bIsEncrypted ) ? sal_True : sal_False;
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if ( bMustDecrypt )
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ZipFile::StaticGetCipher ( rData, maCipher );
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if ( bHaveEncryptData && mbWrappedRaw && bIsEncrypted )
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{
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// if we have the data needed to decrypt it, but didn't want it decrypted (or
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// we couldn't decrypt it due to wrong password), then we prepend this
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// data to the stream
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// Make a buffer big enough to hold both the header and the data itself
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maHeader.realloc ( n_ConstHeaderSize +
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rData->aInitVector.getLength() +
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rData->aSalt.getLength() +
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rData->aDigest.getLength() +
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aMediaType.getLength() * sizeof( sal_Unicode ) );
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sal_Int8 * pHeader = maHeader.getArray();
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ZipFile::StaticFillHeader ( rData, rEntry.nSize, aMediaType, pHeader );
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mnHeaderToRead = static_cast < sal_Int16 > ( maHeader.getLength() );
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}
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}
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// allows to read package raw stream
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XUnbufferedStream::XUnbufferedStream( const Reference < XInputStream >& xRawStream,
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const vos::ORef < EncryptionData > &rData )
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: mxZipStream ( xRawStream )
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, mxZipSeek ( xRawStream, UNO_QUERY )
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, mxData ( rData )
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, maCipher ( NULL )
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, maInflater ( sal_True )
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, mbRawStream ( sal_False )
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, mbWrappedRaw ( sal_False )
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, mbFinished ( sal_False )
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, mnHeaderToRead ( 0 )
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, mnZipCurrent ( 0 )
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, mnZipEnd ( 0 )
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, mnZipSize ( 0 )
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, mnMyCurrent ( 0 )
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, mbCheckCRC( sal_False )
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{
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// for this scenario maEntry is not set !!!
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OSL_ENSURE( mxZipSeek.is(), "The stream must be seekable!\n" );
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// skip raw header, it must be already parsed to rData
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mnZipCurrent = n_ConstHeaderSize + rData->aInitVector.getLength() +
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rData->aSalt.getLength() + rData->aDigest.getLength();
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try {
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if ( mxZipSeek.is() )
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mnZipSize = mxZipSeek->getLength();
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} catch( Exception& )
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{
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// in case of problem the size will stay set to 0
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}
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mnZipEnd = mnZipCurrent + mnZipSize;
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ZipFile::StaticGetCipher ( rData, maCipher );
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}
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XUnbufferedStream::~XUnbufferedStream()
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{
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if ( maCipher )
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rtl_cipher_destroy ( maCipher );
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}
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sal_Int32 SAL_CALL XUnbufferedStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
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throw( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
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{
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sal_Int32 nRequestedBytes = nBytesToRead;
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OSL_ENSURE( !mnHeaderToRead || mbWrappedRaw, "Only encrypted raw stream can be provided with header!" );
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if ( mnMyCurrent + nRequestedBytes > mnZipSize + maHeader.getLength() )
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nRequestedBytes = static_cast < sal_Int32 > ( mnZipSize + maHeader.getLength() - mnMyCurrent );
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sal_Int32 nRead = 0, nLastRead = 0, nTotal = 0;
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aData.realloc ( nRequestedBytes );
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if ( nRequestedBytes )
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{
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if ( mbRawStream )
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{
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sal_Int64 nDiff = mnZipEnd - mnZipCurrent;
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if ( mbWrappedRaw && mnHeaderToRead )
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{
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sal_Int16 nHeadRead = static_cast< sal_Int16 >(( nRequestedBytes > mnHeaderToRead ?
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mnHeaderToRead : nRequestedBytes ));
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memcpy ( aData.getArray(), maHeader.getConstArray() + maHeader.getLength() - mnHeaderToRead, nHeadRead );
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mnHeaderToRead = mnHeaderToRead - nHeadRead;
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if ( nHeadRead < nRequestedBytes )
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{
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sal_Int32 nToRead = nRequestedBytes - nHeadRead;
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nToRead = ( nDiff < nToRead ) ? sal::static_int_cast< sal_Int32 >( nDiff ) : nToRead;
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Sequence< sal_Int8 > aPureData( nToRead );
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mxZipSeek->seek ( mnZipCurrent );
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nRead = mxZipStream->readBytes ( aPureData, nToRead );
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mnZipCurrent += nRead;
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aPureData.realloc( nRead );
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if ( mbCheckCRC )
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maCRC.update( aPureData );
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aData.realloc( nHeadRead + nRead );
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sal_Int8* pPureBuffer = aPureData.getArray();
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sal_Int8* pBuffer = aData.getArray();
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for ( sal_Int32 nInd = 0; nInd < nRead; nInd++ )
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pBuffer[ nHeadRead + nInd ] = pPureBuffer[ nInd ];
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}
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nRead += nHeadRead;
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}
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else
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{
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mxZipSeek->seek ( mnZipCurrent );
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nRead = mxZipStream->readBytes (
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aData,
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static_cast < sal_Int32 > ( nDiff < nRequestedBytes ? nDiff : nRequestedBytes ) );
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mnZipCurrent += nRead;
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aData.realloc( nRead );
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if ( mbWrappedRaw && mbCheckCRC )
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maCRC.update( aData );
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}
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}
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else
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{
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while ( 0 == ( nLastRead = maInflater.doInflateSegment( aData, nRead, aData.getLength() - nRead ) ) ||
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( nRead + nLastRead != nRequestedBytes && mnZipCurrent < mnZipEnd ) )
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{
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nRead += nLastRead;
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if ( nRead > nRequestedBytes )
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throw RuntimeException(
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OUString( RTL_CONSTASCII_USTRINGPARAM( "Should not be possible to read more then requested!" ) ),
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Reference< XInterface >() );
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if ( maInflater.finished() )
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throw ZipIOException( OUString( RTL_CONSTASCII_USTRINGPARAM( "The stream seems to be broken!" ) ),
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Reference< XInterface >() );
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if ( maInflater.needsDictionary() )
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throw ZipIOException( OUString( RTL_CONSTASCII_USTRINGPARAM( "Dictionaries are not supported!" ) ),
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Reference< XInterface >() );
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sal_Int32 nDiff = static_cast < sal_Int32 > ( mnZipEnd - mnZipCurrent );
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if ( nDiff > 0 )
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{
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mxZipSeek->seek ( mnZipCurrent );
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sal_Int32 nToRead = std::min ( nDiff, std::max ( nRequestedBytes, static_cast< sal_Int32 >( 8192 ) ) );
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sal_Int32 nZipRead = mxZipStream->readBytes ( maCompBuffer, nToRead );
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mnZipCurrent += nZipRead;
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// maCompBuffer now has the data, check if we need to decrypt
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// before passing to the Inflater
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if ( maCipher )
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{
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if ( mbCheckCRC )
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maCRC.update( maCompBuffer );
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Sequence < sal_Int8 > aCryptBuffer ( nZipRead );
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rtlCipherError aResult =
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rtl_cipher_decode ( maCipher,
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maCompBuffer.getConstArray(),
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nZipRead,
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reinterpret_cast < sal_uInt8 * > (aCryptBuffer.getArray()),
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nZipRead);
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if( aResult != rtl_Cipher_E_None ) {
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OSL_ASSERT (aResult == rtl_Cipher_E_None);
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}
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maCompBuffer = aCryptBuffer; // Now it holds the decrypted data
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}
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maInflater.setInput ( maCompBuffer );
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}
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else
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{
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throw ZipIOException( OUString( RTL_CONSTASCII_USTRINGPARAM( "The stream seems to be broken!" ) ),
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Reference< XInterface >() );
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}
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}
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}
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mnMyCurrent += nRead + nLastRead;
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nTotal = nRead + nLastRead;
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if ( nTotal < nRequestedBytes)
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aData.realloc ( nTotal );
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if ( mbCheckCRC && ( !mbRawStream || mbWrappedRaw ) )
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{
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if ( !maCipher && !mbWrappedRaw )
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maCRC.update( aData );
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#if 0
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// for debugging purposes here
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if ( mbWrappedRaw )
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{
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if ( 0 )
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{
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uno::Reference< lang::XMultiServiceFactory > xFactory = comphelper::getProcessServiceFactory();
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uno::Reference< ucb::XSimpleFileAccess > xAccess( xFactory->createInstance( ::rtl::OUString::createFromAscii( "com.sun.star.ucb.SimpleFileAccess" ) ), uno::UNO_QUERY );
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uno::Reference< io::XOutputStream > xOut = xAccess->openFileWrite( ::rtl::OUString::createFromAscii( "file:///d:/777/Encrypted/picture" ) );
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xOut->writeBytes( aData );
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xOut->closeOutput();
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}
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}
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#endif
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if ( mnZipSize + maHeader.getLength() == mnMyCurrent && maCRC.getValue() != maEntry.nCrc )
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throw ZipIOException( OUString( RTL_CONSTASCII_USTRINGPARAM( "The stream seems to be broken!" ) ),
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Reference< XInterface >() );
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}
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}
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return nTotal;
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}
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sal_Int32 SAL_CALL XUnbufferedStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
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throw( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
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{
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return readBytes ( aData, nMaxBytesToRead );
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}
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void SAL_CALL XUnbufferedStream::skipBytes( sal_Int32 nBytesToSkip )
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throw( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
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{
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if ( nBytesToSkip )
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{
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Sequence < sal_Int8 > aSequence ( nBytesToSkip );
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readBytes ( aSequence, nBytesToSkip );
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}
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}
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sal_Int32 SAL_CALL XUnbufferedStream::available( )
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throw( NotConnectedException, IOException, RuntimeException)
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{
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return static_cast < sal_Int32 > ( mnZipSize - mnMyCurrent );
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}
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void SAL_CALL XUnbufferedStream::closeInput( )
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throw( NotConnectedException, IOException, RuntimeException)
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{
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}
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/*
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void SAL_CALL XUnbufferedStream::seek( sal_Int64 location )
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throw( IllegalArgumentException, IOException, RuntimeException)
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{
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}
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sal_Int64 SAL_CALL XUnbufferedStream::getPosition( )
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throw(IOException, RuntimeException)
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{
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return mnMyCurrent;
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}
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sal_Int64 SAL_CALL XUnbufferedStream::getLength( )
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throw(IOException, RuntimeException)
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{
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return mnZipSize;
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}
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*/
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