/*
* 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.
*
*/
package org.apache.directory.server.ldap.handlers.bind;
import javax.security.sasl.SaslServer;
import org.apache.directory.server.ldap.LdapSession;
import org.apache.mina.core.filterchain.IoFilterChain;
import org.apache.mina.core.session.IoSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* An abstract class for all the MechanismHandlers, implementing some common methods
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
public abstract class AbstractMechanismHandler implements MechanismHandler
{
/** A logger for this class **/
private static final Logger LOG = LoggerFactory.getLogger( AbstractMechanismHandler.class );
/**
* Inject a SaslFilter into the Filter chain, to deal with modified
* PDU sent when some mechanisms have been negotiated (DIGEST-MD5, GSSAPI,
* for instance)
*
* @param ldapSession the LdapSession instance
*/
protected void insertSaslFilter( LdapSession ldapSession )
{
LOG.debug( "Inserting SaslFilter to engage negotiated security layer." );
IoSession ioSession = ldapSession.getIoSession();
// get the Io chain
IoFilterChain chain = ioSession.getFilterChain();
if ( !chain.contains( SaslConstants.SASL_FILTER ) )
{
SaslServer saslServer = ( SaslServer ) ldapSession.getSaslProperty( SaslConstants.SASL_SERVER );
chain.addBefore( "codec", SaslConstants.SASL_FILTER, new SaslFilter( saslServer ) );
}
/*
* We disable the SASL security layer once, to write the outbound SUCCESS
* message without SASL security layer processing.
*/
ioSession.setAttribute( SaslFilter.DISABLE_SECURITY_LAYER_ONCE, Boolean.TRUE );
}
}