| /* |
| * 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.kerberos.shared.messages.value; |
| |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.directory.server.kerberos.shared.messages.Encodable; |
| import org.apache.directory.shared.asn1.AbstractAsn1Object; |
| import org.apache.directory.shared.asn1.ber.tlv.TLV; |
| import org.apache.directory.shared.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.shared.asn1.codec.EncoderException; |
| import org.apache.directory.shared.ldap.util.StringTools; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * An authorization data container. |
| * |
| * The ASN.1 grammar is : |
| * |
| * -- NOTE: AuthorizationData is always used as an OPTIONAL field and |
| * -- should not be empty. |
| * AuthorizationData ::= SEQUENCE OF AuthorizationDataEntry |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| public class AuthorizationData extends AbstractAsn1Object implements Encodable |
| { |
| /** The logger */ |
| private static final Logger log = LoggerFactory.getLogger( AuthorizationData.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = log.isDebugEnabled(); |
| |
| /** The list of AuthrorizationData elements */ |
| private List<AuthorizationDataEntry> entries = new ArrayList<AuthorizationDataEntry>(); |
| |
| // Storage for computed lengths |
| private transient int authorizationDataLength; |
| |
| |
| /** |
| * Creates a new instance of AuthorizationData. |
| */ |
| public AuthorizationData() |
| { |
| // used by ASN.1 decoder |
| } |
| |
| |
| /** |
| * Adds all {@link AuthorizationData} entries to this {@link AuthorizationData}. |
| * |
| * @param data |
| */ |
| public void add( AuthorizationData data ) |
| { |
| entries.addAll( data.entries ); |
| } |
| |
| |
| /** |
| * Adds an {@link AuthorizationDataEntry} to this {@link AuthorizationData}. |
| * |
| * @param entry |
| */ |
| public void add( AuthorizationDataEntry entry ) |
| { |
| entries.add( entry ); |
| } |
| |
| |
| /** |
| * @return The AuthorizationdataEntry list |
| */ |
| public List<AuthorizationDataEntry> getEntries() |
| { |
| return entries; |
| } |
| |
| |
| /** |
| * Compute the AuthorizationData length |
| * |
| * AuthorizationData : |
| * |
| * 0x30 L1 AuthorizationData |
| * | |
| * +--> 0x30 L2 AuthorizationDataEntry |
| * | |
| * +--> 0x30 L2 AuthorizationDataEntry |
| * | |
| * ... |
| * | |
| * +--> 0x30 L2 AuthorizationDataEntry |
| */ |
| public int computeLength() |
| { |
| if ( ( entries == null ) || ( entries.size() == 0 ) ) |
| { |
| authorizationDataLength = 1; |
| |
| return authorizationDataLength + 1; |
| } |
| else |
| { |
| authorizationDataLength = 0; |
| |
| for ( AuthorizationDataEntry entry : entries ) |
| { |
| authorizationDataLength += entry.computeLength(); |
| } |
| |
| return 1 + TLV.getNbBytes( authorizationDataLength ) + authorizationDataLength; |
| } |
| } |
| |
| |
| /** |
| * Encode the AuthorizationData message to a PDU. |
| * |
| * AuthorizationData : |
| * |
| * 0x30 LL |
| * 0x30 LL AuthorizationDataEntry |
| * 0x30 LL AuthorizationDataEntry |
| * ... |
| * 0x30 LL AuthorizationDataEntry |
| * |
| * @param buffer The buffer where to put the PDU. It should have been allocated |
| * before, with the right size. |
| * @return The constructed PDU. |
| */ |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| throw new EncoderException( "Cannot put a PDU in a null buffer !" ); |
| } |
| |
| try |
| { |
| // The AuthorizationData SEQ Tag |
| buffer.put( UniversalTag.SEQUENCE_TAG ); |
| buffer.put( TLV.getBytes( authorizationDataLength ) ); |
| |
| // Each entry, if any |
| if ( ( entries != null ) && ( entries.size() != 0 ) ) |
| { |
| for ( AuthorizationDataEntry entry : entries ) |
| { |
| entry.encode( buffer ); |
| } |
| } |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| log.error( |
| "Cannot encode the AuthorizationData object, the PDU size is {} when only {} bytes has been allocated", |
| 1 + TLV.getNbBytes( authorizationDataLength ) + authorizationDataLength, buffer.capacity() ); |
| throw new EncoderException( "The PDU buffer size is too small !" ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| log.debug( "AuthorizationData encoding : {}", StringTools.dumpBytes( buffer.array() ) ); |
| log.debug( "AuthorizationData initial value : {}", toString() ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| return toString( "" ); |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString( String tabs ) |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| if ( ( entries == null ) || ( entries.size() == 0 ) ) |
| { |
| sb.append( tabs ).append( "AuthorizationData : {}\n" ); |
| } |
| else |
| { |
| sb.append( tabs ).append( "AuthorizationData : {\n" ); |
| boolean isFirst = true; |
| |
| for ( AuthorizationDataEntry entry : entries ) |
| { |
| if ( isFirst ) |
| { |
| isFirst = false; |
| } |
| else |
| { |
| sb.append( '\n' ); |
| } |
| |
| sb.append( entry.toString( tabs + " " ) ).append( '\n' ); |
| } |
| |
| sb.append( tabs + "}" ); |
| } |
| |
| return sb.toString(); |
| } |
| } |