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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 .
*/
#include "encryptionengine.hxx"
#include <com/sun/star/xml/crypto/XXMLEncryptionTemplate.hpp>
#include <com/sun/star/xml/wrapper/XXMLElementWrapper.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
using namespace com::sun::star::uno;
namespace cssxc = com::sun::star::xml::crypto;
namespace cssxw = com::sun::star::xml::wrapper;
#define ENCRYPTION_TEMPLATE "com.sun.star.xml.crypto.XMLEncryptionTemplate"
EncryptionEngine::EncryptionEngine( const Reference<XComponentContext> & xContext)
:m_xContext(xContext), m_nIdOfBlocker(-1)
{
}
bool EncryptionEngine::checkReady() const
/****** EncryptionEngine/checkReady ******************************************
*
* NAME
* checkReady -- checks the conditions for the main operation.
*
* SYNOPSIS
* bReady = checkReady( );
*
* FUNCTION
* checks whether all following conditions are satisfied:
* 1. the main operation has't begun yet;
* 2. the key material is known;
* 3. the id of the template blocker is known;
* 4. both the key element and the encryption template
* are bufferred.
*
* INPUTS
* empty
*
* RESULT
* bReady - true if all conditions are satisfied, false otherwise
*
* AUTHOR
* Michael Mi
* Email: michael.mi@sun.com
******************************************************************************/
{
bool rc = true;
sal_Int32 nKeyInc = 0;
if (m_nIdOfKeyEC != 0)
{
nKeyInc = 1;
}
if (m_bMissionDone ||
m_nIdOfKeyEC == -1 ||
m_nIdOfBlocker == -1 ||
1+nKeyInc > m_nNumOfResolvedReferences )
{
rc = false;
}
return rc;
}
void EncryptionEngine::tryToPerform( )
throw (Exception, RuntimeException)
/****** EncryptionEngine/tryToPerform ****************************************
*
* NAME
* tryToPerform -- tries to perform the encryption/decryption operation.
*
* SYNOPSIS
* tryToPerform( );
*
* FUNCTION
* if the situation is ready, perform following operations.
* 1. prepares a encryption template;
* 2. calls the encryption bridge component;
* 3. clears up all used resources;
* 4. notifies the result listener;
* 5. sets the "accomplishment" flag.
*
* INPUTS
* empty
*
* RESULT
* empty
*
* AUTHOR
* Michael Mi
* Email: michael.mi@sun.com
******************************************************************************/
{
if (checkReady())
{
const OUString sEncryptionTemplate ( ENCRYPTION_TEMPLATE );
Reference < cssxc::XXMLEncryptionTemplate > xEncryptionTemplate(
m_xContext->getServiceManager()->createInstanceWithContext( sEncryptionTemplate, m_xContext ), UNO_QUERY );
OSL_ASSERT( xEncryptionTemplate.is() );
Reference< cssxw::XXMLElementWrapper > xXMLElement
= m_xSAXEventKeeper->getElement( m_nIdOfTemplateEC );
xEncryptionTemplate->setTemplate(xXMLElement);
startEngine( xEncryptionTemplate );
/*
* done
*/
clearUp( );
notifyResultListener();
m_bMissionDone = true;
}
}
void EncryptionEngine::clearUp( ) const
/****** EncryptionEngine/clearup *********************************************
*
* NAME
* clearUp -- clear up all resources used by this operation.
*
* SYNOPSIS
* clearUp( );
*
* FUNCTION
* cleaning resources up includes:
* 1. releases the ElementCollector for the encryption template element;
* 2. releases the Blocker for the encryption template element;
* 3. releases the ElementCollector for the key element, if there is one.
*
* INPUTS
* empty
*
* RESULT
* empty
*
* AUTHOR
* Michael Mi
* Email: michael.mi@sun.com
******************************************************************************/
{
Reference < cssxc::sax::XReferenceResolvedBroadcaster >
xReferenceResolvedBroadcaster( m_xSAXEventKeeper, UNO_QUERY );
xReferenceResolvedBroadcaster->removeReferenceResolvedListener(
m_nIdOfTemplateEC,
(const Reference < cssxc::sax::XReferenceResolvedListener >)((SecurityEngine *)this));
m_xSAXEventKeeper->removeElementCollector(m_nIdOfTemplateEC);
if (m_nIdOfBlocker != -1)
{
m_xSAXEventKeeper->removeBlocker(m_nIdOfBlocker);
}
if (m_nIdOfKeyEC != 0 && m_nIdOfKeyEC != -1)
{
m_xSAXEventKeeper->removeElementCollector(m_nIdOfKeyEC);
}
}
/* XBlockerMonitor */
void SAL_CALL EncryptionEngine::setBlockerId( sal_Int32 id )
throw (com::sun::star::uno::Exception, com::sun::star::uno::RuntimeException)
{
m_nIdOfBlocker = id;
tryToPerform();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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