240 lines
9.2 KiB
C++
240 lines
9.2 KiB
C++
/*************************************************************************
|
|
*
|
|
* $RCSfile: EntryInputStream.cxx,v $
|
|
*
|
|
* $Revision: 1.17 $
|
|
*
|
|
* last change: $Author: mtg $ $Date: 2001-07-04 14:56:24 $
|
|
*
|
|
* 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 <EntryInputStream.hxx>
|
|
#endif
|
|
#ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPCONSTANTS_HPP_
|
|
#include <com/sun/star/packages/zip/ZipConstants.hpp>
|
|
#endif
|
|
#ifndef _RTL_CIPHER_H_
|
|
#include <rtl/cipher.h>
|
|
#endif
|
|
#ifndef _RTL_DIGEST_H_
|
|
#include <rtl/digest.h>
|
|
#endif
|
|
#include <memory.h> // 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;
|
|
}
|