/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_xmlsecurity.hxx"

#include "decryptorimpl.hxx"
#include <com/sun/star/xml/crypto/XXMLEncryptionTemplate.hpp>
#include <com/sun/star/xml/wrapper/XXMLElementWrapper.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>

namespace cssu = com::sun::star::uno;
namespace cssl = com::sun::star::lang;
namespace cssxc = com::sun::star::xml::crypto;
namespace cssxw = com::sun::star::xml::wrapper;

#define SERVICE_NAME "com.sun.star.xml.crypto.sax.Decryptor"
#define IMPLEMENTATION_NAME "com.sun.star.xml.security.framework.DecryptorImpl"

#define	DECLARE_ASCII( SASCIIVALUE )																			\
	rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( SASCIIVALUE ) )

DecryptorImpl::DecryptorImpl( const cssu::Reference< cssl::XMultiServiceFactory >& rxMSF)
{
	mxMSF = rxMSF;
}

DecryptorImpl::~DecryptorImpl()
{
}

bool DecryptorImpl::checkReady() const
/****** DecryptorImpl/checkReady *********************************************
 *
 *   NAME
 *	checkReady -- checks the conditions for the decryption.
 *
 *   SYNOPSIS
 *	bReady = checkReady( );
 *
 *   FUNCTION
 *	checks whether all following conditions are satisfied:
 *	1. the result listener is ready;
 *	2. the EncryptionEngine is ready.
 *
 *   INPUTS
 *	empty
 *
 *   RESULT
 *	bReady - true if all conditions are satisfied, false otherwise
 *
 *   HISTORY
 *	05.01.2004 -	implemented
 *
 *   AUTHOR
 *	Michael Mi
 *	Email: michael.mi@sun.com
 ******************************************************************************/
{
	return (m_xResultListener.is() && EncryptionEngine::checkReady());
}

void DecryptorImpl::notifyResultListener() const
	throw (cssu::Exception, cssu::RuntimeException)
/****** DecryptorImpl/notifyResultListener ***********************************
 *
 *   NAME
 *	notifyResultListener -- notifies the listener about the decryption
 *	result.
 *
 *   SYNOPSIS
 *	notifyResultListener( );
 *
 *   FUNCTION
 *	see NAME.
 *
 *   INPUTS
 *	empty
 *
 *   RESULT
 *	empty
 *
 *   HISTORY
 *	05.01.2004 -	implemented
 *
 *   AUTHOR
 *	Michael Mi
 *	Email: michael.mi@sun.com
 ******************************************************************************/
{
	cssu::Reference< cssxc::sax::XDecryptionResultListener >
		xDecryptionResultListener ( m_xResultListener , cssu::UNO_QUERY ) ;
		
	xDecryptionResultListener->decrypted(m_nSecurityId,m_nStatus);
}

void DecryptorImpl::startEngine( const cssu::Reference< 
	cssxc::XXMLEncryptionTemplate >&
	xEncryptionTemplate)
	throw (cssu::Exception, cssu::RuntimeException)
/****** DecryptorImpl/startEngine ********************************************
 *
 *   NAME
 *	startEngine -- decrypts the encryption.
 *
 *   SYNOPSIS
 *	startEngine( xEncryptionTemplate );
 *
 *   FUNCTION
 *	decrypts the encryption element, then if succeeds, updates the link
 *	of old template element to the new encryption element in 
 *	SAXEventKeeper.
 *
 *   INPUTS
 *	xEncryptionTemplate - the encryption template to be decrypted.
 *
 *   RESULT
 *	empty
 *
 *   HISTORY
 *	05.01.2004 -	implemented
 *
 *   AUTHOR
 *	Michael Mi
 *	Email: michael.mi@sun.com
 ******************************************************************************/
{
	cssu::Reference< cssxc::XXMLEncryptionTemplate > xResultTemplate;
	try
	{
		xResultTemplate = m_xXMLEncryption->decrypt(xEncryptionTemplate, m_xXMLSecurityContext);
		m_nStatus = xResultTemplate->getStatus();
	}
	catch( cssu::Exception& )
	{
		m_nStatus = cssxc::SecurityOperationStatus_RUNTIMEERROR_FAILED;
	}
	
	if (m_nStatus == cssxc::SecurityOperationStatus_OPERATION_SUCCEEDED)
	{
		cssu::Reference< cssxw::XXMLElementWrapper > xDecryptedElement
			= xResultTemplate->getTemplate();
		m_xSAXEventKeeper->setElement(m_nIdOfTemplateEC, xDecryptedElement);
	}
}
	
/* XDecryptionResultBroadcaster */
void SAL_CALL DecryptorImpl::addDecryptionResultListener( const cssu::Reference< cssxc::sax::XDecryptionResultListener >& listener )
    	throw (cssu::Exception, cssu::RuntimeException)
{
	m_xResultListener = listener;
	tryToPerform();
}

void SAL_CALL DecryptorImpl::removeDecryptionResultListener( const cssu::Reference< cssxc::sax::XDecryptionResultListener >&)
    	throw (cssu::RuntimeException)
{
}

/* XInitialization */
void SAL_CALL DecryptorImpl::initialize( const cssu::Sequence< cssu::Any >& aArguments ) 
	throw (cssu::Exception, cssu::RuntimeException)
{
	OSL_ASSERT(aArguments.getLength() == 5);
	
	rtl::OUString ouTempString;
	
	aArguments[0] >>= ouTempString;
	m_nSecurityId = ouTempString.toInt32();
	aArguments[1] >>= m_xSAXEventKeeper;
	aArguments[2] >>= ouTempString;
	m_nIdOfTemplateEC = ouTempString.toInt32();
	aArguments[3] >>= m_xXMLSecurityContext;
	aArguments[4] >>= m_xXMLEncryption;
}

rtl::OUString DecryptorImpl_getImplementationName ()
	throw (cssu::RuntimeException)
{
	return rtl::OUString ( RTL_CONSTASCII_USTRINGPARAM ( IMPLEMENTATION_NAME ) );
}

sal_Bool SAL_CALL DecryptorImpl_supportsService( const rtl::OUString& ServiceName ) 
	throw (cssu::RuntimeException)
{
	return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( SERVICE_NAME ));
}

cssu::Sequence< rtl::OUString > SAL_CALL DecryptorImpl_getSupportedServiceNames(  ) 
	throw (cssu::RuntimeException)
{
	cssu::Sequence < rtl::OUString > aRet(1);
	rtl::OUString* pArray = aRet.getArray();
	pArray[0] =  rtl::OUString ( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) );
	return aRet;
}
#undef SERVICE_NAME

cssu::Reference< cssu::XInterface > SAL_CALL DecryptorImpl_createInstance( const cssu::Reference< cssl::XMultiServiceFactory >& rSMgr)
	throw( cssu::Exception )
{
	return (cppu::OWeakObject*) new DecryptorImpl(rSMgr);
}

/* XServiceInfo */
rtl::OUString SAL_CALL DecryptorImpl::getImplementationName(  ) 
	throw (cssu::RuntimeException)
{
	return DecryptorImpl_getImplementationName();
}
sal_Bool SAL_CALL DecryptorImpl::supportsService( const rtl::OUString& rServiceName ) 
	throw (cssu::RuntimeException)
{
	return DecryptorImpl_supportsService( rServiceName );
}
cssu::Sequence< rtl::OUString > SAL_CALL DecryptorImpl::getSupportedServiceNames(  ) 
	throw (cssu::RuntimeException)
{
	return DecryptorImpl_getSupportedServiceNames();
}