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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 <sfx2/DocumentSigner.hxx>
#include <tools/stream.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <unotools/streamwrap.hxx>
#include <comphelper/storagehelper.hxx>
#include <comphelper/processfactory.hxx>
#include <com/sun/star/embed/XStorage.hpp>
#include <com/sun/star/embed/StorageFormats.hpp>
#include <com/sun/star/embed/XTransactedObject.hpp>
#include <com/sun/star/security/DocumentSignatureInformation.hpp>
#include <com/sun/star/security/DocumentDigitalSignatures.hpp>
#include <com/sun/star/io/WrongFormatException.hpp>
#include <com/sun/star/io/XStream.hpp>
using namespace css;
namespace sfx2
{
bool DocumentSigner::signDocument(uno::Reference<security::XCertificate> const& rxCertificate)
{
std::unique_ptr<SvStream> pStream(
utl::UcbStreamHelper::CreateStream(m_aUrl, StreamMode::READ | StreamMode::WRITE));
uno::Reference<io::XStream> xInputStream(new utl::OStreamWrapper(std::move(pStream)));
bool bResult = false;
uno::Reference<embed::XStorage> xWriteableZipStore;
try
{
xWriteableZipStore = comphelper::OStorageHelper::GetStorageOfFormatFromStream(
ZIP_STORAGE_FORMAT_STRING, xInputStream);
}
catch (const io::IOException&)
{
}
OUString aODFVersion(comphelper::OStorageHelper::GetODFVersionFromStorage(xWriteableZipStore));
uno::Reference<security::XDocumentDigitalSignatures> xSigner(
security::DocumentDigitalSignatures::createWithVersionAndValidSignature(
comphelper::getProcessComponentContext(), aODFVersion,
/*bHasValidDocumentSignature*/ true));
try
{
uno::Reference<embed::XStorage> xMetaInf;
if (xWriteableZipStore.is() && xWriteableZipStore->hasByName("META-INF"))
{
xMetaInf = xWriteableZipStore->openStorageElement("META-INF",
embed::ElementModes::READWRITE);
if (!xMetaInf.is())
throw uno::RuntimeException();
}
if (xMetaInf.is())
{
uno::Reference<embed::XStorage> xStorage
= comphelper::OStorageHelper::GetStorageOfFormatFromStream(
ZIP_STORAGE_FORMAT_STRING, xInputStream);
// ODF.
uno::Reference<io::XStream> xStream;
xStream.set(
xMetaInf->openStreamElement(xSigner->getDocumentContentSignatureDefaultStreamName(),
embed::ElementModes::READWRITE),
uno::UNO_SET_THROW);
bool bSuccess = xSigner->signDocumentWithCertificate(rxCertificate, xStorage, xStream);
if (bSuccess)
{
uno::Reference<embed::XTransactedObject> xTransact(xMetaInf, uno::UNO_QUERY_THROW);
xTransact->commit();
xTransact.set(xWriteableZipStore, uno::UNO_QUERY_THROW);
xTransact->commit();
bResult = true;
}
}
else if (xWriteableZipStore.is())
{
uno::Reference<embed::XStorage> xStorage
= comphelper::OStorageHelper::GetStorageOfFormatFromStream(
ZIP_STORAGE_FORMAT_STRING, xInputStream);
// OOXML.
uno::Reference<io::XStream> xStream;
// We need read-write to be able to add the signature relation.
bool bSuccess = xSigner->signDocumentWithCertificate(rxCertificate, xStorage, xStream);
if (bSuccess)
{
uno::Reference<embed::XTransactedObject> xTransact(xWriteableZipStore,
uno::UNO_QUERY_THROW);
xTransact->commit();
bResult = true;
}
}
else
{
// Something not ZIP based: e.g. PDF.
bResult = xSigner->signDocumentWithCertificate(
rxCertificate, uno::Reference<embed::XStorage>(), xInputStream);
}
}
catch (const uno::Exception&)
{
}
return bResult;
}
} // namespace sfx2
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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