/*
* 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.changepw.protocol;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import javax.security.auth.kerberos.KerberosPrincipal;
import org.apache.directory.server.changepw.ChangePasswordServer;
import org.apache.directory.server.changepw.exceptions.ChangePasswordException;
import org.apache.directory.server.changepw.exceptions.ErrorType;
import org.apache.directory.server.changepw.messages.ChangePasswordErrorModifier;
import org.apache.directory.server.changepw.messages.ChangePasswordRequest;
import org.apache.directory.server.changepw.service.ChangePasswordContext;
import org.apache.directory.server.changepw.service.ChangePasswordService;
import org.apache.directory.server.i18n.I18n;
import org.apache.directory.server.kerberos.shared.exceptions.KerberosException;
import org.apache.directory.server.kerberos.shared.messages.ErrorMessage;
import org.apache.directory.server.kerberos.shared.messages.ErrorMessageModifier;
import org.apache.directory.server.kerberos.shared.messages.value.KerberosTime;
import org.apache.directory.server.kerberos.shared.store.PrincipalStore;
import org.apache.mina.core.service.IoHandler;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev: 901657 $, $Date: 2010-01-21 12:27:15 +0100 (Jeu, 21 jan 2010) $
*/
public class ChangePasswordProtocolHandler implements IoHandler
{
private static final Logger log = LoggerFactory.getLogger( ChangePasswordProtocolHandler.class );
private ChangePasswordServer config;
private PrincipalStore store;
private String contextKey = "context";
/**
* Creates a new instance of ChangePasswordProtocolHandler.
*
* @param config
* @param store
*/
public ChangePasswordProtocolHandler( ChangePasswordServer config, PrincipalStore store )
{
this.config = config;
this.store = store;
}
public void sessionCreated( IoSession session ) throws Exception
{
if ( log.isDebugEnabled() )
{
log.debug( "{} CREATED: {}", session.getRemoteAddress(), session.getTransportMetadata() );
}
if ( session.getTransportMetadata().isConnectionless() )
{
session.getFilterChain().addFirst( "codec",
new ProtocolCodecFilter( ChangePasswordUdpProtocolCodecFactory.getInstance() ) );
}
else
{
session.getFilterChain().addFirst( "codec",
new ProtocolCodecFilter( ChangePasswordTcpProtocolCodecFactory.getInstance() ) );
}
}
public void sessionOpened( IoSession session )
{
log.debug( "{} OPENED", session.getRemoteAddress() );
}
public void sessionClosed( IoSession session )
{
log.debug( "{} CLOSED", session.getRemoteAddress() );
}
public void sessionIdle( IoSession session, IdleStatus status )
{
log.debug( "{} IDLE ({})", session.getRemoteAddress(), status );
}
public void exceptionCaught( IoSession session, Throwable cause )
{
log.debug( session.getRemoteAddress() + " EXCEPTION", cause );
session.close( true );
}
public void messageReceived( IoSession session, Object message )
{
log.debug( "{} RCVD: {}", session.getRemoteAddress(), message );
InetAddress clientAddress = ( ( InetSocketAddress ) session.getRemoteAddress() ).getAddress();
ChangePasswordRequest request = ( ChangePasswordRequest ) message;
try
{
ChangePasswordContext changepwContext = new ChangePasswordContext();
changepwContext.setConfig( config );
changepwContext.setStore( store );
changepwContext.setClientAddress( clientAddress );
changepwContext.setRequest( request );
session.setAttribute( getContextKey(), changepwContext );
ChangePasswordService.execute( session, changepwContext );
session.write( changepwContext.getReply() );
}
catch ( KerberosException ke )
{
if ( log.isDebugEnabled() )
{
log.warn( ke.getLocalizedMessage(), ke );
}
else
{
log.warn( ke.getLocalizedMessage() );
}
ErrorMessage errorMessage = getErrorMessage( config.getServicePrincipal(), ke );
ChangePasswordErrorModifier modifier = new ChangePasswordErrorModifier();
modifier.setErrorMessage( errorMessage );
session.write( modifier.getChangePasswordError() );
}
catch ( Exception e )
{
log.error( I18n.err( I18n.ERR_152, e.getLocalizedMessage() ), e );
session.write( getErrorMessage( config.getServicePrincipal(), new ChangePasswordException(
ErrorType.KRB5_KPASSWD_UNKNOWN_ERROR ) ) );
}
}
public void messageSent( IoSession session, Object message )
{
if ( log.isDebugEnabled() )
{
log.debug( "{} SENT: {}", session.getRemoteAddress(), message );
}
}
protected String getContextKey()
{
return ( this.contextKey );
}
private ErrorMessage getErrorMessage( KerberosPrincipal principal, KerberosException exception )
{
ErrorMessageModifier modifier = new ErrorMessageModifier();
KerberosTime now = new KerberosTime();
modifier.setErrorCode( exception.getErrorCode() );
modifier.setExplanatoryText( exception.getLocalizedMessage() );
modifier.setServerPrincipal( principal );
modifier.setServerTime( now );
modifier.setServerMicroSecond( 0 );
modifier.setExplanatoryData( buildExplanatoryData( exception ) );
return modifier.getErrorMessage();
}
private byte[] buildExplanatoryData( KerberosException exception )
{
short resultCode = ( short ) exception.getErrorCode();
byte[] resultString =
{ ( byte ) 0x00 };
if ( exception.getExplanatoryData() == null || exception.getExplanatoryData().length == 0 )
{
try
{
resultString = exception.getLocalizedMessage().getBytes( "UTF-8" );
}
catch ( UnsupportedEncodingException uee )
{
log.error( uee.getLocalizedMessage() );
}
}
else
{
resultString = exception.getExplanatoryData();
}
ByteBuffer byteBuffer = ByteBuffer.allocate( 256 );
byteBuffer.putShort( resultCode );
byteBuffer.put( resultString );
byteBuffer.flip();
byte[] explanatoryData = new byte[byteBuffer.remaining()];
byteBuffer.get( explanatoryData, 0, explanatoryData.length );
return explanatoryData;
}
}