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-rw-r--r--oox/source/crypto/DocumentEncryption.cxx103
1 files changed, 103 insertions, 0 deletions
diff --git a/oox/source/crypto/DocumentEncryption.cxx b/oox/source/crypto/DocumentEncryption.cxx
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+++ b/oox/source/crypto/DocumentEncryption.cxx
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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/DocumentEncryption.hxx>
+
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/io/XStream.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <com/sun/star/packages/XPackageEncryption.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include <oox/helper/binaryoutputstream.hxx>
+#include <oox/ole/olestorage.hxx>
+#include <sal/log.hxx>
+
+namespace oox::crypto {
+
+using namespace css::io;
+using namespace css::uno;
+using namespace css::beans;
+
+DocumentEncryption::DocumentEncryption(const Reference< XComponentContext >& rxContext,
+ Reference<XStream> const & xDocumentStream,
+ oox::ole::OleStorage& rOleStorage,
+ const Sequence<NamedValue>& rMediaEncData)
+ : mxContext(rxContext)
+ , mxDocumentStream(xDocumentStream)
+ , mrOleStorage(rOleStorage)
+ , mMediaEncData(rMediaEncData)
+{
+ // Select engine
+ for (int i = 0; i < rMediaEncData.getLength(); i++)
+ {
+ if (rMediaEncData[i].Name == "CryptoType")
+ {
+ OUString sCryptoType;
+ rMediaEncData[i].Value >>= sCryptoType;
+
+ if (sCryptoType == "Standard")
+ sCryptoType = "StrongEncryptionDataSpace";
+
+ Sequence<Any> aArguments;
+ mxPackageEncryption.set(
+ mxContext->getServiceManager()->createInstanceWithArgumentsAndContext(
+ "com.sun.star.comp.oox.crypto." + sCryptoType, aArguments, mxContext), css::uno::UNO_QUERY);
+
+ if (!mxPackageEncryption.is())
+ {
+ SAL_WARN("oox", "Requested encryption method \"" << sCryptoType << "\" is not supported");
+ }
+
+ break;
+ }
+ }
+}
+
+bool DocumentEncryption::encrypt()
+{
+ if (!mxPackageEncryption.is())
+ return false;
+
+ Reference<XInputStream> xInputStream (mxDocumentStream->getInputStream(), UNO_SET_THROW);
+ Reference<XSeekable> xSeekable(xInputStream, UNO_QUERY);
+
+ if (!xSeekable.is())
+ return false;
+
+ xSeekable->seek(0); // seek to begin of the document stream
+
+ if (!mrOleStorage.isStorage())
+ return false;
+
+ mxPackageEncryption->setupEncryption(mMediaEncData);
+
+ Sequence<NamedValue> aStreams = mxPackageEncryption->encrypt(xInputStream);
+
+ for (const NamedValue & aStream : std::as_const(aStreams))
+ {
+ Reference<XOutputStream> xOutputStream(mrOleStorage.openOutputStream(aStream.Name), UNO_SET_THROW);
+ BinaryXOutputStream aBinaryOutputStream(xOutputStream, true);
+
+ css::uno::Sequence<sal_Int8> aStreamSequence;
+ aStream.Value >>= aStreamSequence;
+
+ aBinaryOutputStream.writeData(aStreamSequence);
+
+ aBinaryOutputStream.close();
+ }
+
+ return true;
+}
+
+} // namespace oox::crypto
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */