/************************************************************************* * * $RCSfile: EntryInputStream.cxx,v $ * * $Revision: 1.19 $ * * last change: $Author: hr $ $Date: 2003-03-26 14:13:44 $ * * 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 _ENTRY_INPUT_STREAM_HXX #include #endif #ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPCONSTANTS_HPP_ #include #endif #ifndef _RTL_CIPHER_H_ #include #endif #ifndef _RTL_DIGEST_H_ #include #endif #include // for memcpy using namespace rtl; using namespace com::sun::star; using namespace com::sun::star::uno; using namespace com::sun::star::packages::zip; using namespace com::sun::star::packages::zip::ZipConstants; /** Provides access to the compressed data in a zipfile. * * 04/12/00 - uncompresses the stream into memory and seeks on it 'in memory' * This and the ZipPackageBuffer used in the ZipOutputStream are memory hogs * and will hopefully be replaced eventually * * Acts on the same underlying XInputStream as both the full Zip File and other * EntryInputStreams, and thus must maintain its current position in the stream and * seek to it before performing any reads. */ EntryInputStream::EntryInputStream( Reference < io::XInputStream > xNewInput, const ZipEntry & rNewEntry, const vos::ORef < EncryptionData > &xEncryptData, sal_Bool bGetRawStream) : xStream( xNewInput ) , xSeek( xNewInput, UNO_QUERY ) , aEntry (rNewEntry ) , nCurrent( 0 ) , bHaveInMemory ( sal_False ) , aInflater( sal_True ) , aBuffer( 0 ) , xEncryptionData (xEncryptData) , bRawStream (bGetRawStream) { if (bGetRawStream) { nUncompressedSize = aEntry.nMethod == DEFLATED ? aEntry.nCompressedSize : aEntry.nSize; nEnd = aEntry.nOffset + nUncompressedSize; } else { nEnd = aEntry.nMethod == DEFLATED ? aEntry.nOffset + aEntry.nCompressedSize : aEntry.nOffset + aEntry.nSize; nUncompressedSize = aEntry.nSize; } } void EntryInputStream::readIntoMemory() throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, RuntimeException) { if (!bHaveInMemory) { Sequence < sal_Int8 > aReadBuffer; xSeek->seek(aEntry.nOffset); sal_Int32 nSize = aEntry.nMethod == DEFLATED ? aEntry.nCompressedSize : aEntry.nSize; if (nSize <0) throw io::BufferSizeExceededException(::rtl::OUString(), *this); xStream->readBytes( aReadBuffer, nSize ); // Now it holds the raw stuff from disk if (xEncryptionData->aSalt.getLength()) { // Have salt, will travel Sequence < sal_uInt8 > aDerivedKey (16); rtlCipherError aResult; Sequence < sal_Int8 > aDecryptBuffer; // Get the key rtl_digest_PBKDF2 ( aDerivedKey.getArray(), 16, reinterpret_cast < const sal_uInt8 * > (xEncryptionData->aKey.getConstArray()), xEncryptionData->aKey.getLength(), xEncryptionData->aSalt.getConstArray(), xEncryptionData->aSalt.getLength(), xEncryptionData->nIterationCount ); rtlCipher aCipher = rtl_cipher_create (rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream); aResult = rtl_cipher_init( aCipher, rtl_Cipher_DirectionDecode, aDerivedKey.getConstArray(), aDerivedKey.getLength(), xEncryptionData->aInitVector.getConstArray(), xEncryptionData->aInitVector.getLength()); OSL_ASSERT (aResult == rtl_Cipher_E_None); aDecryptBuffer.realloc ( nSize ); 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 || aEntry.nMethod == STORED) aBuffer = aReadBuffer; // bRawStream means the caller doesn't want it decompressed else { aInflater.setInputSegment(aReadBuffer, 0, nSize ); aBuffer.realloc( aEntry.nSize ); aInflater.doInflate(aBuffer); aInflater.end(); } bHaveInMemory = sal_True; } } EntryInputStream::~EntryInputStream( void ) { } sal_Int32 SAL_CALL EntryInputStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, RuntimeException) { if (nBytesToRead <0) throw io::BufferSizeExceededException(::rtl::OUString(), *this); if (!bHaveInMemory) readIntoMemory(); if (nBytesToRead + nCurrent > nUncompressedSize) nBytesToRead = static_cast < sal_Int32> ( nUncompressedSize - nCurrent ); aData.realloc( nBytesToRead ); memcpy(aData.getArray(), aBuffer.getConstArray() + nCurrent, nBytesToRead); nCurrent+=nBytesToRead; return nBytesToRead; } sal_Int32 SAL_CALL EntryInputStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, RuntimeException) { return readBytes( aData, nMaxBytesToRead ); } void SAL_CALL EntryInputStream::skipBytes( sal_Int32 nBytesToSkip ) throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, RuntimeException) { if (nBytesToSkip < 0) throw io::BufferSizeExceededException(::rtl::OUString(), *this); if (nBytesToSkip + nCurrent > nUncompressedSize) nBytesToSkip = static_cast < sal_Int32 > (nUncompressedSize- nCurrent); nCurrent+=nBytesToSkip; } sal_Int32 SAL_CALL EntryInputStream::available( ) throw(io::NotConnectedException, io::IOException, RuntimeException) { return static_cast < sal_Int32 > (nUncompressedSize - nCurrent); } void SAL_CALL EntryInputStream::closeInput( ) throw(io::NotConnectedException, io::IOException, RuntimeException) { } void SAL_CALL EntryInputStream::seek( sal_Int64 location ) throw(lang::IllegalArgumentException, io::IOException, RuntimeException) { if (location > nUncompressedSize) location = nUncompressedSize; if (location <0) location = 0; nCurrent = location; } sal_Int64 SAL_CALL EntryInputStream::getPosition( ) throw(io::IOException, RuntimeException) { return nCurrent; } sal_Int64 SAL_CALL EntryInputStream::getLength( ) throw(io::IOException, RuntimeException) { return nUncompressedSize; }