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diff --git a/xmlsecurity/source/xmlsec/nss/ciphercontext.hxx b/xmlsecurity/source/xmlsec/nss/ciphercontext.hxx
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+++ b/xmlsecurity/source/xmlsec/nss/ciphercontext.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_SOURCE_XMLSEC_NSS_CIPHERCONTEXT_HXX
+#define INCLUDED_XMLSECURITY_SOURCE_XMLSEC_NSS_CIPHERCONTEXT_HXX
+
+#include <com/sun/star/xml/crypto/XCipherContext.hpp>
+
+#include <cppuhelper/implbase.hxx>
+#include <osl/mutex.hxx>
+#include <seccomon.h>
+#include <secmodt.h>
+
+class OCipherContext : public cppu::WeakImplHelper< css::xml::crypto::XCipherContext >
+{
+private:
+    ::osl::Mutex m_aMutex;
+
+    PK11SlotInfo* m_pSlot;
+    PK11SymKey* m_pSymKey;
+    SECItem* m_pSecParam;
+    PK11Context* m_pContext;
+
+    sal_Int32 m_nBlockSize;
+    css::uno::Sequence< sal_Int8 > m_aLastBlock;
+
+    bool m_bEncryption;
+    bool m_bPadding;
+    bool m_bW3CPadding;
+    sal_Int64 m_nConverted;
+
+    bool m_bDisposed;
+    bool m_bBroken;
+
+    void Dispose();
+
+    OCipherContext()
+    : m_pSlot( nullptr )
+    , m_pSymKey( nullptr )
+    , m_pSecParam( nullptr )
+    , m_pContext( nullptr )
+    , m_nBlockSize( 0 )
+    , m_bEncryption( false )
+    , m_bPadding( false )
+    , m_bW3CPadding( false )
+    , m_nConverted( 0 )
+    , m_bDisposed( false )
+    , m_bBroken( false )
+    {}
+
+public:
+
+    virtual ~OCipherContext() override
+    {
+        Dispose();
+    }
+
+    static css::uno::Reference< css::xml::crypto::XCipherContext > Create( CK_MECHANISM_TYPE nNSSCipherID, const css::uno::Sequence< ::sal_Int8 >& aKey, const css::uno::Sequence< ::sal_Int8 >& aInitializationVector, bool bEncryption, bool bW3CPadding );
+
+    // XCipherContext
+    virtual css::uno::Sequence< ::sal_Int8 > SAL_CALL convertWithCipherContext( const css::uno::Sequence< ::sal_Int8 >& aData ) override;
+    virtual css::uno::Sequence< ::sal_Int8 > SAL_CALL finalizeCipherContextAndDispose(  ) override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */