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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/StrongEncryptionDataSpace.hxx>
#include <oox/crypto/AgileEngine.hxx>
#include <oox/crypto/Standard2007Engine.hxx>
#include <oox/helper/binaryoutputstream.hxx>
#include <oox/helper/binaryinputstream.hxx>
#include <com/sun/star/io/SequenceInputStream.hpp>
#include <com/sun/star/io/XSequenceOutputStream.hpp>
#include <comphelper/sequenceashashmap.hxx>
#include <cppuhelper/supportsservice.hxx>
using namespace css;
using namespace css::beans;
using namespace css::io;
using namespace css::lang;
using namespace css::uno;
namespace oox::crypto
{
StrongEncryptionDataSpace::StrongEncryptionDataSpace(const Reference<XComponentContext>& rxContext)
: mxContext(rxContext)
, mCryptoEngine(new Standard2007Engine)
{
}
sal_Bool StrongEncryptionDataSpace::generateEncryptionKey(const OUString& rPassword)
{
if (!mCryptoEngine)
return false;
return mCryptoEngine->generateEncryptionKey(rPassword);
}
sal_Bool StrongEncryptionDataSpace::checkDataIntegrity()
{
if (!mCryptoEngine)
return false;
return mCryptoEngine->checkDataIntegrity();
}
sal_Bool StrongEncryptionDataSpace::decrypt(const Reference<XInputStream>& rxInputStream,
Reference<XOutputStream>& rxOutputStream)
{
if (!mCryptoEngine)
return false;
BinaryXInputStream aInputStream(rxInputStream, true);
BinaryXOutputStream aOutputStream(rxOutputStream, true);
mCryptoEngine->decrypt(aInputStream, aOutputStream);
rxOutputStream->flush();
return true;
}
Reference<XInputStream> StrongEncryptionDataSpace::getStream(const Sequence<NamedValue>& rStreams,
std::u16string_view sStreamName)
{
for (const auto& aStream : rStreams)
{
if (aStream.Name == sStreamName)
{
Sequence<sal_Int8> aSeq;
aStream.Value >>= aSeq;
Reference<XInputStream> aStream2(
io::SequenceInputStream::createStreamFromSequence(mxContext, aSeq),
UNO_QUERY_THROW);
return aStream2;
}
}
return nullptr;
}
sal_Bool StrongEncryptionDataSpace::readEncryptionInfo(const Sequence<NamedValue>& aStreams)
{
Reference<XInputStream> xEncryptionInfo = getStream(aStreams, u"EncryptionInfo");
if (!xEncryptionInfo.is())
return false;
BinaryXInputStream aBinaryInputStream(xEncryptionInfo, true);
sal_uInt32 aVersion = aBinaryInputStream.readuInt32();
switch (aVersion)
{
case msfilter::VERSION_INFO_2007_FORMAT:
case msfilter::VERSION_INFO_2007_FORMAT_SP2:
mCryptoEngine.reset(new Standard2007Engine);
break;
case msfilter::VERSION_INFO_AGILE:
mCryptoEngine.reset(new AgileEngine());
break;
default:
break;
}
if (!mCryptoEngine)
return false;
return mCryptoEngine->readEncryptionInfo(xEncryptionInfo);
}
sal_Bool StrongEncryptionDataSpace::setupEncryption(const Sequence<NamedValue>& rMediaEncData)
{
if (!mCryptoEngine)
return false;
OUString sPassword;
for (const auto& aParam : rMediaEncData)
{
if (aParam.Name == "OOXPassword")
{
aParam.Value >>= sPassword;
}
}
return mCryptoEngine->setupEncryption(sPassword);
}
Sequence<NamedValue> StrongEncryptionDataSpace::createEncryptionData(const OUString& rPassword)
{
comphelper::SequenceAsHashMap aEncryptionData;
aEncryptionData["OOXPassword"] <<= rPassword;
aEncryptionData["CryptoType"] <<= OUString("StrongEncryptionDataSpace");
return aEncryptionData.getAsConstNamedValueList();
}
Sequence<NamedValue>
StrongEncryptionDataSpace::encrypt(const Reference<XInputStream>& rxInputStream)
{
if (!mCryptoEngine)
return Sequence<NamedValue>();
Reference<XSeekable> xSeekable(rxInputStream, UNO_QUERY);
if (!xSeekable.is())
return Sequence<NamedValue>();
sal_uInt32 aLength = xSeekable->getLength(); // check length of the stream
Reference<XOutputStream> xOutputStream(
mxContext->getServiceManager()->createInstanceWithContext(
"com.sun.star.io.SequenceOutputStream", mxContext),
UNO_QUERY);
mCryptoEngine->encrypt(rxInputStream, xOutputStream, aLength);
comphelper::SequenceAsHashMap aStreams;
Reference<XSequenceOutputStream> xEncodedFileSequenceStream(xOutputStream, UNO_QUERY);
aStreams["EncryptedPackage"] <<= xEncodedFileSequenceStream->getWrittenBytes();
Reference<XOutputStream> aEncryptionInfoStream(
mxContext->getServiceManager()->createInstanceWithContext(
"com.sun.star.io.SequenceOutputStream", mxContext),
UNO_QUERY);
BinaryXOutputStream rStream(aEncryptionInfoStream, false);
mCryptoEngine->writeEncryptionInfo(rStream);
aEncryptionInfoStream->flush();
Reference<XSequenceOutputStream> aEncryptionInfoSequenceStream(aEncryptionInfoStream,
UNO_QUERY);
aStreams["EncryptionInfo"] <<= aEncryptionInfoSequenceStream->getWrittenBytes();
return aStreams.getAsConstNamedValueList();
}
OUString SAL_CALL StrongEncryptionDataSpace::getImplementationName()
{
return "com.sun.star.comp.oox.crypto.StrongEncryptionDataSpace";
}
sal_Bool SAL_CALL StrongEncryptionDataSpace::supportsService(const OUString& rServiceName)
{
return cppu::supportsService(this, rServiceName);
}
css::uno::Sequence<OUString> SAL_CALL StrongEncryptionDataSpace::getSupportedServiceNames()
{
Sequence<OUString> aServices{ "com.sun.star.packages.PackageEncryption" };
return aServices;
}
} // namespace oox::crypto
extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface*
com_sun_star_comp_oox_crypto_StrongEncryptionDataSpace_get_implementation(
uno::XComponentContext* pCtx, uno::Sequence<uno::Any> const& /*rSeq*/)
{
return cppu::acquire(new oox::crypto::StrongEncryptionDataSpace(pCtx));
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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