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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <ZipOutputEntry.hxx>
#include <com/sun/star/io/TempFile.hpp>
#include <com/sun/star/packages/zip/ZipConstants.hpp>
#include <com/sun/star/ucb/SimpleFileAccess.hpp>
#include <com/sun/star/ucb/XSimpleFileAccess3.hpp>
#include <comphelper/storagehelper.hxx>
#include <osl/time.h>
#include <osl/diagnose.h>
#include <PackageConstants.hxx>
#include <ZipEntry.hxx>
#include <ZipFile.hxx>
#include <ZipPackageBuffer.hxx>
#include <ZipPackageStream.hxx>
#include <algorithm>
using namespace com::sun::star;
using namespace com::sun::star::io;
using namespace com::sun::star::uno;
using namespace com::sun::star::packages::zip::ZipConstants;
/** This class is used to deflate Zip entries
*/
ZipOutputEntry::ZipOutputEntry(
const css::uno::Reference< css::io::XOutputStream >& rxOutput,
const uno::Reference< uno::XComponentContext >& rxContext,
ZipEntry& rEntry,
ZipPackageStream* pStream,
bool bEncrypt)
: m_aDeflateBuffer(n_ConstBufferSize)
, m_aDeflater(DEFAULT_COMPRESSION, true)
, m_xContext(rxContext)
, m_xOutStream(rxOutput)
, m_pCurrentEntry(&rEntry)
, m_nDigested(0)
, m_bEncryptCurrentEntry(bEncrypt)
, m_pCurrentStream(pStream)
{
assert(m_pCurrentEntry->nMethod == DEFLATED && "Use ZipPackageStream::rawWrite() for STORED entries");
assert(m_xOutStream.is());
if (m_bEncryptCurrentEntry)
{
m_xCipherContext = ZipFile::StaticGetCipher( m_xContext, pStream->GetEncryptionData(), true );
m_xDigestContext = ZipFile::StaticGetDigestContextForChecksum( m_xContext, pStream->GetEncryptionData() );
}
}
ZipOutputEntry::ZipOutputEntry(
const uno::Reference< uno::XComponentContext >& rxContext,
ZipEntry& rEntry,
ZipPackageStream* pStream,
bool bEncrypt)
: m_aDeflateBuffer(n_ConstBufferSize)
, m_aDeflater(DEFAULT_COMPRESSION, true)
, m_xContext(rxContext)
, m_pCurrentEntry(&rEntry)
, m_nDigested(0)
, m_bEncryptCurrentEntry(bEncrypt)
, m_pCurrentStream(pStream)
{
assert(m_pCurrentEntry->nMethod == DEFLATED && "Use ZipPackageStream::rawWrite() for STORED entries");
if (m_bEncryptCurrentEntry)
{
m_xCipherContext = ZipFile::StaticGetCipher( m_xContext, pStream->GetEncryptionData(), true );
m_xDigestContext = ZipFile::StaticGetDigestContextForChecksum( m_xContext, pStream->GetEncryptionData() );
}
}
ZipOutputEntry::~ZipOutputEntry()
{
}
void ZipOutputEntry::createBufferFile()
{
assert(!m_xOutStream.is() && m_aTempURL.isEmpty() &&
"should only be called in the threaded mode where there is no existing stream yet");
uno::Reference < beans::XPropertySet > xTempFileProps(
io::TempFile::create(m_xContext),
uno::UNO_QUERY_THROW );
xTempFileProps->setPropertyValue("RemoveFile", uno::makeAny(sal_False));
uno::Any aUrl = xTempFileProps->getPropertyValue( "Uri" );
aUrl >>= m_aTempURL;
assert(!m_aTempURL.isEmpty());
uno::Reference < ucb::XSimpleFileAccess3 > xTempAccess(ucb::SimpleFileAccess::create(m_xContext));
m_xOutStream = xTempAccess->openFileWrite(m_aTempURL);
}
void ZipOutputEntry::closeBufferFile()
{
m_xOutStream->closeOutput();
m_xOutStream.clear();
}
void ZipOutputEntry::deleteBufferFile()
{
assert(!m_xOutStream.is() && !m_aTempURL.isEmpty());
uno::Reference < ucb::XSimpleFileAccess3 > xAccess(ucb::SimpleFileAccess::create(m_xContext));
xAccess->kill(m_aTempURL);
}
uno::Reference< io::XInputStream > ZipOutputEntry::getData() const
{
uno::Reference < ucb::XSimpleFileAccess3 > xTempAccess(ucb::SimpleFileAccess::create(m_xContext));
return xTempAccess->openFileRead(m_aTempURL);
}
void ZipOutputEntry::closeEntry()
{
m_aDeflater.finish();
while (!m_aDeflater.finished())
doDeflate();
if ((m_pCurrentEntry->nFlag & 8) == 0)
{
if (m_pCurrentEntry->nSize != m_aDeflater.getTotalIn())
{
OSL_FAIL("Invalid entry size");
}
if (m_pCurrentEntry->nCompressedSize != m_aDeflater.getTotalOut())
{
// Different compression strategies make the merit of this
// test somewhat dubious
m_pCurrentEntry->nCompressedSize = m_aDeflater.getTotalOut();
}
if (m_pCurrentEntry->nCrc != m_aCRC.getValue())
{
OSL_FAIL("Invalid entry CRC-32");
}
}
else
{
if ( !m_bEncryptCurrentEntry )
{
m_pCurrentEntry->nSize = m_aDeflater.getTotalIn();
m_pCurrentEntry->nCompressedSize = m_aDeflater.getTotalOut();
}
m_pCurrentEntry->nCrc = m_aCRC.getValue();
}
m_aDeflater.reset();
m_aCRC.reset();
if (m_bEncryptCurrentEntry)
{
m_xCipherContext.clear();
uno::Sequence< sal_Int8 > aDigestSeq;
if ( m_xDigestContext.is() )
{
aDigestSeq = m_xDigestContext->finalizeDigestAndDispose();
m_xDigestContext.clear();
}
if ( m_pCurrentStream )
m_pCurrentStream->setDigest( aDigestSeq );
}
}
void ZipOutputEntry::write( const Sequence< sal_Int8 >& rBuffer )
{
if (!m_aDeflater.finished())
{
m_aDeflater.setInputSegment(rBuffer);
while (!m_aDeflater.needsInput())
doDeflate();
if (!m_bEncryptCurrentEntry)
m_aCRC.updateSegment(rBuffer, rBuffer.getLength());
}
}
void ZipOutputEntry::doDeflate()
{
sal_Int32 nLength = m_aDeflater.doDeflateSegment(m_aDeflateBuffer, 0, m_aDeflateBuffer.getLength());
if ( nLength > 0 )
{
uno::Sequence< sal_Int8 > aTmpBuffer( m_aDeflateBuffer.getConstArray(), nLength );
if ( m_bEncryptCurrentEntry && m_xDigestContext.is() && m_xCipherContext.is() )
{
// Need to update our digest before encryption...
sal_Int32 nDiff = n_ConstDigestLength - m_nDigested;
if ( nDiff )
{
sal_Int32 nEat = ::std::min( nLength, nDiff );
uno::Sequence< sal_Int8 > aTmpSeq( aTmpBuffer.getConstArray(), nEat );
m_xDigestContext->updateDigest( aTmpSeq );
m_nDigested = m_nDigested + static_cast< sal_Int16 >( nEat );
}
// FIXME64: uno::Sequence not 64bit safe.
uno::Sequence< sal_Int8 > aEncryptionBuffer = m_xCipherContext->convertWithCipherContext( aTmpBuffer );
m_xOutStream->writeBytes( aEncryptionBuffer );
// the sizes as well as checksum for encrypted streams is calculated here
m_pCurrentEntry->nCompressedSize += aEncryptionBuffer.getLength();
m_pCurrentEntry->nSize = m_pCurrentEntry->nCompressedSize;
m_aCRC.update( aEncryptionBuffer );
}
else
{
m_xOutStream->writeBytes ( aTmpBuffer );
}
}
if ( m_aDeflater.finished() && m_bEncryptCurrentEntry && m_xDigestContext.is() && m_xCipherContext.is() )
{
// FIXME64: sequence not 64bit safe.
uno::Sequence< sal_Int8 > aEncryptionBuffer = m_xCipherContext->finalizeCipherContextAndDispose();
if ( aEncryptionBuffer.getLength() )
{
m_xOutStream->writeBytes( aEncryptionBuffer );
// the sizes as well as checksum for encrypted streams is calculated hier
m_pCurrentEntry->nCompressedSize += aEncryptionBuffer.getLength();
m_pCurrentEntry->nSize = m_pCurrentEntry->nCompressedSize;
m_aCRC.update( aEncryptionBuffer );
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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