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diff --git a/include/oox/crypto/DocumentDecryption.hxx b/include/oox/crypto/DocumentDecryption.hxx
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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/.
+ *
+ */
+
+#ifndef INCLUDED_OOX_CRYPTO_DOCUMENTDECRYPTION_HXX
+#define INCLUDED_OOX_CRYPTO_DOCUMENTDECRYPTION_HXX
+
+#include <oox/dllapi.h>
+
+#include <memory>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+ namespace beans { struct NamedValue; }
+ namespace io { class XInputStream; }
+ namespace io { class XStream; }
+ namespace uno { class XComponentContext; }
+ namespace packages { class XPackageEncryption; }
+}
+
+namespace oox::ole { class OleStorage; }
+
+namespace oox {
+namespace crypto {
+
+class DocumentDecryption
+{
+private:
+ css::uno::Reference< css::uno::XComponentContext > mxContext;
+ oox::ole::OleStorage& mrOleStorage;
+ css::uno::Sequence<css::beans::NamedValue> maStreamsSequence;
+ css::uno::Reference< css::packages::XPackageEncryption > mxPackageEncryption;
+
+public:
+ DocumentDecryption(const css::uno::Reference< css::uno::XComponentContext >& rxContext, oox::ole::OleStorage& rOleStorage);
+
+ bool decrypt(const css::uno::Reference< css::io::XStream >& xDocumentStream);
+ bool readEncryptionInfo();
+ bool generateEncryptionKey(const OUString& rPassword);
+
+ css::uno::Sequence< css::beans::NamedValue > createEncryptionData(const OUString& rPassword);
+
+};
+
+} // namespace crypto
+} // namespace oox
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */