001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    package org.apache.directory.server.core.authn;
021    
022    
023    import org.apache.directory.server.core.LdapPrincipal;
024    import org.apache.directory.server.core.interceptor.context.BindOperationContext;
025    import org.apache.directory.server.i18n.I18n;
026    import org.apache.directory.shared.ldap.constants.AuthenticationLevel;
027    import org.apache.directory.shared.ldap.exception.LdapNoPermissionException;
028    
029    
030    /**
031     * An {@link Authenticator} that handles anonymous connections
032     * (type <tt>'none'</tt>).
033     *
034     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
035     */
036    public class AnonymousAuthenticator extends AbstractAuthenticator
037    {
038        /**
039         * Creates a new instance.
040         */
041        public AnonymousAuthenticator()
042        {
043            super( AuthenticationLevel.NONE.toString() );
044        }
045    
046    
047        /**
048         * If the context is not configured to allow anonymous connections,
049         * this method throws a {@link javax.naming.NoPermissionException}.
050         */
051        public LdapPrincipal authenticate( BindOperationContext opContext ) throws LdapNoPermissionException
052        {
053            // We only allow Anonymous binds if the service allows them
054            if ( getDirectoryService().isAllowAnonymousAccess() )
055            {
056                return LdapPrincipal.ANONYMOUS;
057            }
058            else
059            {
060                throw new LdapNoPermissionException( I18n.err( I18n.ERR_228 ) );
061            }
062        }
063    }