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diff --git a/xmlsecurity/inc/certificatechooser.hxx b/xmlsecurity/inc/certificatechooser.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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_XMLSECURITY_INC_CERTIFICATECHOOSER_HXX
+#define INCLUDED_XMLSECURITY_INC_CERTIFICATECHOOSER_HXX
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <vcl/weld.hxx>
+
+namespace com::sun::star {
+    namespace security { class XCertificate; }
+    namespace xml::crypto {
+        class XSecurityEnvironment;
+    }
+}
+
+namespace com::sun::star::xml::crypto { class XXMLSecurityContext; }
+
+struct UserData
+{
+    css::uno::Reference<css::security::XCertificate> xCertificate;
+    css::uno::Reference<css::xml::crypto::XXMLSecurityContext> xSecurityContext;
+    css::uno::Reference<css::xml::crypto::XSecurityEnvironment> xSecurityEnvironment;
+};
+
+enum class UserAction
+{
+    Sign,
+    SelectSign, // Select signing certificate
+    Encrypt
+};
+
+class CertificateChooser final : public weld::GenericDialogController
+{
+private:
+    std::vector< css::uno::Reference< css::xml::crypto::XXMLSecurityContext > > mxSecurityContexts;
+    std::vector<std::shared_ptr<UserData>> mvUserData;
+
+    bool                    mbInitialized;
+    UserAction const        meAction;
+    OUString                msPreferredKey;
+    css::uno::Reference<css::security::XCertificate> mxEncryptToSelf;
+
+    std::unique_ptr<weld::Label>    m_xFTSign;
+    std::unique_ptr<weld::Label>    m_xFTEncrypt;
+    std::unique_ptr<weld::TreeView> m_xCertLB;
+    std::unique_ptr<weld::Button>   m_xViewBtn;
+    std::unique_ptr<weld::Button>   m_xOKBtn;
+    std::unique_ptr<weld::Label>    m_xFTDescription;
+    std::unique_ptr<weld::Entry>    m_xDescriptionED;
+
+    DECL_LINK(ViewButtonHdl, weld::Button&, void);
+    DECL_LINK(CertificateHighlightHdl, weld::TreeView&, void);
+    DECL_LINK(CertificateSelectHdl, weld::TreeView&, bool);
+
+    void ImplShowCertificateDetails();
+    void ImplInitialize();
+
+    static void HandleOneUsageBit(OUString& string, int& bits, int bit, const char *name);
+
+public:
+    CertificateChooser(weld::Window* pParent,
+                       std::vector< css::uno::Reference< css::xml::crypto::XXMLSecurityContext > > const & rxSecurityContexts,
+                       UserAction eAction);
+    virtual ~CertificateChooser() override;
+
+    short run() override;
+
+    css::uno::Sequence<css::uno::Reference< css::security::XCertificate > > GetSelectedCertificates();
+    css::uno::Reference< css::xml::crypto::XXMLSecurityContext > GetSelectedSecurityContext() const;
+    /// Gets the description string provided when selecting the certificate.
+    OUString GetDescription() const;
+
+    /// Returns the usage string of the selected certificate, if any.
+    OUString GetUsageText();
+
+    static OUString UsageInClearText(int bits);
+};
+
+#endif // INCLUDED_XMLSECURITY_INC_CERTIFICATECHOOSER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */