262 lines
9.7 KiB
C++
262 lines
9.7 KiB
C++
/*************************************************************************
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*
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* $RCSfile: XUnbufferedStream.cxx,v $
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*
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* $Revision: 1.1 $
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*
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* last change: $Author: mtg $ $Date: 2001-12-04 17:41:17 $
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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 _XUNBUFFERED_STREAM_HXX
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#include <XUnbufferedStream.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 _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 _PACKAGE_CONSTANTS_HXX_
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#include <PackageConstants.hxx>
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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 _ZIP_FILE_HXX
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#include <ZipFile.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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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 ::rtl::OUString;
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XUnbufferedStream::XUnbufferedStream( ZipEntry & rEntry,
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com::sun::star::uno::Reference < com::sun::star::io::XInputStream > xNewZipStream,
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const vos::ORef < EncryptionData > &rData,
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sal_Bool bNewRawStream,
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sal_Bool bIsEncrypted )
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: maEntry ( rEntry )
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, mxData ( rData )
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, mbRawStream ( bNewRawStream )
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, mbFinished ( sal_False )
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, mxZipStream ( xNewZipStream )
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, mxZipSeek ( xNewZipStream, UNO_QUERY )
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, maInflater ( sal_True )
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, maCipher ( NULL )
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, mnMyCurrent ( 0 )
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, mnZipEnd ( 0 )
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, mnZipSize ( 0 )
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, mnZipCurrent ( 0 )
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, mnHeaderToRead ( 0 )
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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 = ( !bNewRawStream && 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 && !bMustDecrypt && 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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sal_Int8 * pHeader = maHeader.getArray();
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ZipFile::StaticFillHeader ( rData, rEntry.nSize, pHeader );
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mnHeaderToRead = static_cast < sal_Int16 > ( maHeader.getLength() );
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}
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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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if ( mnMyCurrent + nRequestedBytes > mnZipSize )
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nRequestedBytes = static_cast < sal_Int32 > ( mnZipSize - 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 ( mnHeaderToRead )
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{
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sal_Int16 nToRead = nRequestedBytes > mnHeaderToRead ? mnHeaderToRead : nRequestedBytes;
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memcpy ( aData.getArray(), maHeader.getConstArray() + maHeader.getLength() - mnHeaderToRead, nToRead );
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mnHeaderToRead -= nToRead;
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if ( mnHeaderToRead == 0 )
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maHeader.realloc ( 0 );
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}
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if ( !mbRawStream )
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{
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while ( 0 == ( nRead = maInflater.doInflateSegment( aData, nRead, aData.getLength() - nRead ) ) ||
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( nRead + nLastRead < nRequestedBytes && mnZipCurrent < mnZipEnd ) )
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{
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nLastRead = nRead;
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if ( maInflater.finished() || maInflater.needsDictionary() )
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{
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// some error handling ?
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return nRead + nLastRead;
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}
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sal_Int64 nDiff = 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 nZipRead = mxZipStream->readBytes ( maCompBuffer, static_cast < sal_Int32 > ( nDiff < nRequestedBytes ? nDiff : nRequestedBytes ) );
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mnZipCurrent += nZipRead;
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// maCompBuffer now has the uncompressed 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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Sequence < sal_Int8 > aCryptBuffer ( nZipRead );
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rtlCipherError aResult = 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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OSL_ASSERT (aResult == rtl_Cipher_E_None);
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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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// some error handling ?
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return nRead + nLastRead;
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}
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}
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}
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else
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{
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sal_Int64 nDiff = mnZipEnd - mnZipCurrent;
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mxZipSeek->seek ( mnZipCurrent );
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nRead = mxZipStream->readBytes ( aData, static_cast < sal_Int32 > ( nDiff < nRequestedBytes ? nDiff : nRequestedBytes ) );
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mnZipCurrent += nRead;
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}
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mnMyCurrent += nRead;
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nTotal = nRead + nLastRead;
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if ( nTotal < nBytesToRead )
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aData.realloc ( nTotal );
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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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Sequence < sal_Int8 > aSequence ( nBytesToSkip );
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readBytes ( aSequence, nBytesToSkip );
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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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