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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/.
*
*/
#include <oox/crypto/DocumentDecryption.hxx>
#include <comphelper/sequenceashashmap.hxx>
#include <cppuhelper/implbase.hxx>
#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/io/XStream.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <oox/crypto/AgileEngine.hxx>
#include <oox/crypto/Standard2007Engine.hxx>
#include <oox/helper/binaryinputstream.hxx>
#include <oox/helper/binaryoutputstream.hxx>
#include <oox/ole/olestorage.hxx>
namespace oox {
namespace core {
using namespace css;
DocumentDecryption::DocumentDecryption(oox::ole::OleStorage& rOleStorage) :
mrOleStorage(rOleStorage),
mCryptoType(UNKNOWN)
{}
bool DocumentDecryption::generateEncryptionKey(const OUString& rPassword)
{
if (mEngine)
return mEngine->generateEncryptionKey(rPassword);
return false;
}
bool DocumentDecryption::readEncryptionInfo()
{
if (!mrOleStorage.isStorage())
return false;
uno::Reference<io::XInputStream> xEncryptionInfo(mrOleStorage.openInputStream("EncryptionInfo"), uno::UNO_QUERY);
BinaryXInputStream aBinaryInputStream(xEncryptionInfo, true);
sal_uInt32 aVersion = aBinaryInputStream.readuInt32();
switch (aVersion)
{
case msfilter::VERSION_INFO_2007_FORMAT:
case msfilter::VERSION_INFO_2007_FORMAT_SP2:
mCryptoType = STANDARD_2007; // Set encryption info format
mEngine.reset(new Standard2007Engine);
break;
case msfilter::VERSION_INFO_AGILE:
mCryptoType = AGILE; // Set encryption info format
mEngine.reset(new AgileEngine);
break;
default:
break;
}
if (mEngine)
return mEngine->readEncryptionInfo(xEncryptionInfo);
return false;
}
uno::Sequence<beans::NamedValue> DocumentDecryption::createEncryptionData(const OUString& rPassword)
{
comphelper::SequenceAsHashMap aEncryptionData;
if (mCryptoType == AGILE)
{
aEncryptionData["CryptoType"] <<= OUString("Agile");
}
else if (mCryptoType == STANDARD_2007)
{
aEncryptionData["CryptoType"] <<= OUString("Standard");
}
aEncryptionData["OOXPassword"] <<= rPassword;
return aEncryptionData.getAsConstNamedValueList();
}
bool DocumentDecryption::decrypt(const uno::Reference<io::XStream>& xDocumentStream)
{
bool bResult = false;
if (!mrOleStorage.isStorage())
return false;
// open the required input streams in the encrypted package
uno::Reference<io::XInputStream> xEncryptedPackage(mrOleStorage.openInputStream("EncryptedPackage"), uno::UNO_QUERY);
// create temporary file for unencrypted package
uno::Reference<io::XOutputStream> xDecryptedPackage(xDocumentStream->getOutputStream(), uno::UNO_QUERY);
BinaryXOutputStream aDecryptedPackage(xDecryptedPackage, true);
BinaryXInputStream aEncryptedPackage(xEncryptedPackage, true);
bResult = mEngine->decrypt(aEncryptedPackage, aDecryptedPackage);
xDecryptedPackage->flush();
aDecryptedPackage.seekToStart();
if (bResult)
return mEngine->checkDataIntegrity();
return bResult;
}
} // namespace core
} // namespace oox
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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