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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: XFileStream.cxx,v $
* $Revision: 1.9 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_package.hxx"
#include <XFileStream.hxx>
#include <EncryptionData.hxx>
#include <com/sun/star/packages/zip/ZipConstants.hpp>
#include <PackageConstants.hxx>
#include <rtl/cipher.h>
#include <ZipFile.hxx>
#include <EncryptedDataHeader.hxx>
#include <com/sun/star/io/XOutputStream.hpp>
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, sal_True );
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( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >(), 1 );
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;
}
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