| /* |
| * 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.api.ldap.extras.extended.ads_impl.whoAmI; |
| |
| |
| import org.apache.directory.api.asn1.DecoderException; |
| import org.apache.directory.api.asn1.ber.grammar.AbstractGrammar; |
| import org.apache.directory.api.asn1.ber.grammar.Grammar; |
| import org.apache.directory.api.asn1.ber.grammar.GrammarAction; |
| import org.apache.directory.api.asn1.ber.grammar.GrammarTransition; |
| import org.apache.directory.api.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.api.ldap.codec.api.LdapApiServiceFactory; |
| import org.apache.directory.api.ldap.extras.extended.whoAmI.WhoAmIResponseImpl; |
| import org.apache.directory.api.ldap.model.exception.LdapInvalidDnException; |
| import org.apache.directory.api.ldap.model.name.Dn; |
| import org.apache.directory.api.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * This class implements the WhoAmIResponse extended operation's ASN.1 grammer. |
| * All the actions are declared in this class. As it is a singleton, |
| * these declaration are only done once. The grammar is : |
| * |
| * <pre> |
| * WhoAmIResponseValue ::= OCTET STRING OPTIONAL } |
| * </pre> |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| |
| public class WhoAmIResponseGrammar extends AbstractGrammar<WhoAmIResponseContainer> |
| { |
| /** logger */ |
| private static final Logger LOG = LoggerFactory.getLogger( WhoAmIResponseGrammar.class ); |
| |
| /** Speedup for logs */ |
| static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** The instance of grammar. WhoAmIResponseGrammar is a singleton */ |
| private static Grammar<WhoAmIResponseContainer> instance = new WhoAmIResponseGrammar(); |
| |
| |
| @SuppressWarnings("unchecked") |
| public WhoAmIResponseGrammar() |
| { |
| setName( WhoAmIResponseGrammar.class.getName() ); |
| |
| // Create the transitions table |
| super.transitions = new GrammarTransition[WhoAmIResponseStatesEnum.LAST_WHO_AM_I_RESPONSE_STATE |
| .ordinal()][256]; |
| |
| /** |
| * Transition from init state to WhoAmI Authzid Response Value |
| * |
| * authzId ::= OCTET STRING OPTIONAL |
| * |
| * Creates the authzid object |
| */ |
| super.transitions[WhoAmIResponseStatesEnum.START_STATE.ordinal()][UniversalTag.OCTET_STRING.getValue()] = |
| new GrammarTransition<WhoAmIResponseContainer>( |
| WhoAmIResponseStatesEnum.START_STATE, |
| WhoAmIResponseStatesEnum.AUTHZ_ID_RESPONSE_STATE, |
| UniversalTag.OCTET_STRING.getValue(), new GrammarAction<WhoAmIResponseContainer>( |
| "Store AuthzId" ) |
| { |
| public void action( WhoAmIResponseContainer container ) throws DecoderException |
| { |
| WhoAmIResponseDecorator whoAmIResponse = new WhoAmIResponseDecorator( |
| LdapApiServiceFactory.getSingleton(), new WhoAmIResponseImpl() ); |
| container.setWhoAmIResponse( whoAmIResponse ); |
| |
| byte[] data = container.getCurrentTLV().getValue().getData(); |
| |
| if ( data != null ) |
| { |
| switch ( data.length ) |
| { |
| case 0: |
| // Error |
| case 1: |
| // Error |
| String msg = "authzId too short. Must starts with either u: or dn:"; |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| |
| case 2 : |
| if ( ( data[0] == 'u' ) && ( data[1] == ':' ) ) |
| { |
| whoAmIResponse.setAuthzId( data ); |
| whoAmIResponse.setUserId( Strings.utf8ToString( data, 3, data.length - 3 ) ); |
| } |
| else |
| { |
| msg = "authzId Must starts with either u: or dn:, it starts with " + Strings.utf8ToString( data ); |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| } |
| |
| break; |
| |
| default : |
| switch ( data[0] ) |
| { |
| case 'u' : |
| if ( data[1] == ':' ) |
| { |
| whoAmIResponse.setAuthzId( data ); |
| whoAmIResponse.setUserId( Strings.utf8ToString( data, 3, data.length - 3 ) ); |
| } |
| else |
| { |
| msg = "authzId Must starts with either u: or dn:, it starts with " + Strings.utf8ToString( data ); |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| } |
| |
| break; |
| |
| case 'd' : |
| if ( ( data[1] == 'n' ) && ( data[2] == ':' ) ) |
| { |
| // Check that the remaining bytes are a valid DN |
| if ( Dn.isValid( Strings.utf8ToString( data, 3, data.length - 3 ) ) ) |
| { |
| whoAmIResponse.setAuthzId( data ); |
| |
| try |
| { |
| whoAmIResponse.setDn( new Dn( Strings.utf8ToString( data, 3, data.length - 3 ) ) ); |
| } |
| catch ( LdapInvalidDnException e ) |
| { |
| // Should never happen |
| } |
| } |
| else |
| { |
| msg = "authzId Must starts with either u: or dn:, it starts with " + Strings.utf8ToString( data ); |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| } |
| } |
| else |
| { |
| msg = "authzId Must starts with either u: or dn:, it starts with " + Strings.utf8ToString( data ); |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| } |
| |
| break; |
| |
| default : |
| msg = "authzId Must starts with either u: or dn:, it starts with " + Strings.utf8ToString( data ); |
| LOG.error( msg ); |
| throw new DecoderException( msg ); |
| } |
| |
| break; |
| } |
| } |
| else |
| { |
| whoAmIResponse.setAuthzId( null ); |
| } |
| |
| // We may have nothing left |
| container.setGrammarEndAllowed( true ); |
| } |
| } ); |
| } |
| |
| |
| /** |
| * This class is a singleton. |
| * |
| * @return An instance on this grammar |
| */ |
| public static Grammar<WhoAmIResponseContainer> getInstance() |
| { |
| return instance; |
| } |
| } |