/************************************************************************* * * $RCSfile: XFileStream.cxx,v $ * * $Revision: 1.6 $ * * last change: $Author: mtg $ $Date: 2001-11-15 20:18:31 $ * * The Contents of this file are made available subject to the terms of * either of the following licenses * * - GNU Lesser General Public License Version 2.1 * - Sun Industry Standards Source License Version 1.1 * * Sun Microsystems Inc., October, 2000 * * GNU Lesser General Public License Version 2.1 * ============================================= * Copyright 2000 by Sun Microsystems, Inc. * 901 San Antonio Road, Palo Alto, CA 94303, USA * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License version 2.1, as published by the Free Software Foundation. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * * * Sun Industry Standards Source License Version 1.1 * ================================================= * The contents of this file are subject to the Sun Industry Standards * Source License Version 1.1 (the "License"); You may not use this file * except in compliance with the License. You may obtain a copy of the * License at http://www.openoffice.org/license.html. * * Software provided under this License is provided on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. * See the License for the specific provisions governing your rights and * obligations concerning the Software. * * The Initial Developer of the Original Code is: Sun Microsystems, Inc. * * Copyright: 2000 by Sun Microsystems, Inc. * * All Rights Reserved. * * Contributor(s): Martin Gallwey (gallwey@sun.com) * * ************************************************************************/ #ifndef _XFILE_STREAM_HXX #include #endif #ifndef _ENCRYPTION_DATA_HXX_ #include #endif #ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPCONSTANTS_HPP_ #include #endif #ifndef _PACKAGE_CONSTANTS_HXX_ #include #endif #ifndef _RTL_CIPHER_H_ #include #endif #ifndef _ZIP_FILE_HXX #include #endif #ifndef _ENCRYPTED_DATA_HEADER_HXX_ #include #endif #ifndef _COM_SUN_STAR_IO_XOUTPUTSTREAM_HPP_ #include #endif using namespace com::sun::star::packages::zip::ZipConstants; using namespace com::sun::star::io; using namespace com::sun::star::uno; using com::sun::star::lang::IllegalArgumentException; using ::rtl::OUString; XFileStream::XFileStream( ZipEntry & rEntry, com::sun::star::uno::Reference < com::sun::star::io::XInputStream > xNewZipStream, com::sun::star::uno::Reference < com::sun::star::io::XInputStream > xNewTempStream, const vos::ORef < EncryptionData > &rData, sal_Bool bNewRawStream, sal_Bool bIsEncrypted ) : maEntry ( rEntry ) , mxData ( rData ) , mbRawStream ( bNewRawStream ) , mbFinished ( sal_False ) , mxTempIn ( xNewTempStream ) , mxTempSeek ( xNewTempStream, UNO_QUERY ) , mxTempOut ( xNewTempStream, UNO_QUERY ) , mxZipStream ( xNewZipStream ) , mxZipSeek ( xNewZipStream, UNO_QUERY ) , maInflater ( sal_True ) , maCipher ( NULL ) { mnZipCurrent = maEntry.nOffset; if (mbRawStream) { mnZipSize = maEntry.nMethod == DEFLATED ? maEntry.nCompressedSize : maEntry.nSize; mnZipEnd = maEntry.nOffset + mnZipSize; } else { mnZipSize = maEntry.nSize; mnZipEnd = maEntry.nMethod == DEFLATED ? maEntry.nOffset + maEntry.nCompressedSize : maEntry.nOffset + maEntry.nSize; } if ( bIsEncrypted ) { sal_Bool bHaveEncryptData = ( !rData.isEmpty() && rData->aSalt.getLength() && rData->aInitVector.getLength() && rData->nIterationCount != 0 ) ? sal_True : sal_False; // if we have all the encrypted data, and want a raw stream, then prepend it to the stream, otherwise // make a cipher so we can decrypt it if ( bHaveEncryptData ) { if ( !bNewRawStream ) ZipFile::StaticGetCipher ( rData, maCipher ); else { // Put in the EncryptedDataHeader Sequence < sal_Int8 > aEncryptedDataHeader ( n_ConstHeaderSize + rData->aInitVector.getLength() + rData->aSalt.getLength() + rData->aDigest.getLength() ); sal_Int8 * pHeader = aEncryptedDataHeader.getArray(); ZipFile::StaticFillHeader ( rData, rEntry.nSize, pHeader ); mxTempOut->writeBytes ( aEncryptedDataHeader ); mnZipSize += mxTempSeek->getPosition(); mxTempSeek->seek ( 0 ); } } } } XFileStream::~XFileStream() { if ( maCipher ) rtl_cipher_destroy ( maCipher ); } void XFileStream::fill( sal_Int64 nUntil) { sal_Int32 nRead; sal_Int64 nPosition = mxTempSeek->getPosition(); mxTempSeek->seek ( mxTempSeek->getLength() ); maBuffer.realloc ( n_ConstBufferSize ); while ( mxTempSeek->getLength() < nUntil ) { if ( !mbRawStream ) { while ( 0 == ( nRead = maInflater.doInflate( maBuffer ) ) ) { if ( maInflater.finished() || maInflater.needsDictionary() ) { // some error handling ? return; } sal_Int64 nDiff = mnZipEnd - mnZipCurrent; if ( nDiff > 0 ) { mxZipSeek->seek ( mnZipCurrent ); nRead = mxZipStream->readBytes ( maCompBuffer, static_cast < sal_Int32 > ( nDiff < n_ConstBufferSize ? nDiff : n_ConstBufferSize ) ); mnZipCurrent += nRead; // maCompBuffer now has the uncompressed data, check if we need to decrypt // before passing to the Inflater if ( maCipher ) { Sequence < sal_Int8 > aCryptBuffer ( nRead ); rtlCipherError aResult = rtl_cipher_decode ( maCipher, maCompBuffer.getConstArray(), nRead, reinterpret_cast < sal_uInt8 * > (aCryptBuffer.getArray()), nRead); OSL_ASSERT (aResult == rtl_Cipher_E_None); maCompBuffer = aCryptBuffer; // Now it holds the decrypted data } maInflater.setInput ( maCompBuffer ); } else { // some error handling ? return; } } } else { sal_Int64 nDiff = mnZipEnd - mnZipCurrent; mxZipSeek->seek ( mnZipCurrent ); nRead = mxZipStream->readBytes ( maBuffer, static_cast < sal_Int32 > ( nDiff < n_ConstBufferSize ? nDiff : n_ConstBufferSize ) ); mnZipCurrent += nRead; } Sequence < sal_Int8 > aTmpBuffer ( maBuffer.getConstArray(), nRead ); mxTempOut->writeBytes ( aTmpBuffer ); } mxTempSeek->seek ( nPosition ); } sal_Int32 SAL_CALL XFileStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) throw( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException) { sal_Int64 nPosition = mxTempSeek->getPosition(); if ( nPosition + nBytesToRead > mnZipSize ) nBytesToRead = static_cast < sal_Int32 > ( mnZipSize - nPosition ); sal_Int64 nUntil = nBytesToRead + nPosition + n_ConstBufferSize; if (nUntil > mnZipSize ) nUntil = mnZipSize; if ( nUntil > mxTempSeek->getLength() ) fill ( nUntil ); sal_Int32 nRead = mxTempIn->readBytes ( aData, nBytesToRead ); return nRead; } sal_Int32 SAL_CALL XFileStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) throw( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException) { return readBytes ( aData, nMaxBytesToRead ); } void SAL_CALL XFileStream::skipBytes( sal_Int32 nBytesToSkip ) throw( NotConnectedException, BufferSizeExceededException, IOException, RuntimeException) { seek ( mxTempSeek->getPosition() + nBytesToSkip ); } sal_Int32 SAL_CALL XFileStream::available( ) throw( NotConnectedException, IOException, RuntimeException) { return static_cast < sal_Int32 > ( mnZipSize - mxTempSeek->getPosition() ); } void SAL_CALL XFileStream::closeInput( ) throw( NotConnectedException, IOException, RuntimeException) { } void SAL_CALL XFileStream::seek( sal_Int64 location ) throw( IllegalArgumentException, IOException, RuntimeException) { if ( location > mnZipSize || location < 0 ) throw IllegalArgumentException(); if ( location > mxTempSeek->getLength() ) { sal_Int64 nUntil = location + n_ConstBufferSize > mnZipSize ? mnZipSize : location + n_ConstBufferSize; fill ( nUntil ); } mxTempSeek->seek ( location ); } sal_Int64 SAL_CALL XFileStream::getPosition( ) throw(IOException, RuntimeException) { return mxTempSeek->getPosition(); } sal_Int64 SAL_CALL XFileStream::getLength( ) throw(IOException, RuntimeException) { return mnZipSize; }