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diff --git a/offapi/com/sun/star/xml/crypto/XCipherContext.idl b/offapi/com/sun/star/xml/crypto/XCipherContext.idl
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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 __com_sun_star_xml_crypto_xciphercontext_idl_
+#define __com_sun_star_xml_crypto_xciphercontext_idl_
+
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/lang/IllegalArgumentException.idl>
+#include <com/sun/star/lang/DisposedException.idl>
+
+
+ module com {  module sun {  module star {  module xml { module crypto {
+
+/** This interface allows to encrypt/decrypt data using the cipher context.
+    <p>
+    The algorithm as well as encryption data are specified on object creation.
+    </p>
+
+    @see XCipherContextSupplier
+    @since OOo 3.4
+ */
+interface XCipherContext : com::sun::star::uno::XInterface
+{
+    /** encrypts/decrypts the data using the cipher.
+        <p>
+        Please have in mind, the cipher object state might depend from the
+        already encrypted/decrypted data ( it depends from the used
+        algorithm ).
+        </p>
+
+        <p>
+        Whether the object does encryption or decryption is specified by
+        creation of the object.
+        </p>
+
+        @param aData
+            data that should be encrypted/decrypted
+     */
+    sequence<byte> convertWithCipherContext( [in] sequence< byte > aData )
+        raises( ::com::sun::star::lang::IllegalArgumentException,
+                ::com::sun::star::lang::DisposedException );
+
+    /** finalizes cipher and disposes context.
+     */
+    sequence<byte> finalizeCipherContextAndDispose()
+        raises( ::com::sun::star::lang::DisposedException );
+};
+
+
+}; }; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */