1 files changed, 103 insertions, 0 deletions
diff --git a/oox/source/crypto/DocumentEncryption.cxx b/oox/source/crypto/DocumentEncryption.cxx
new file mode 100644
index 0000000000..6b88549299
--- /dev/null
+++ b/oox/source/crypto/DocumentEncryption.cxx
@@ -0,0 +1,103 @@
+/* -*- 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: */