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.kerberos.shared.io.decoder; 021 022 023 import java.util.Enumeration; 024 import java.util.HashSet; 025 import java.util.Set; 026 027 import org.apache.directory.server.kerberos.shared.crypto.encryption.EncryptionType; 028 import org.apache.directory.shared.asn1.der.DEREncodable; 029 import org.apache.directory.shared.asn1.der.DERInteger; 030 import org.apache.directory.shared.asn1.der.DERSequence; 031 032 033 /** 034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 035 * @version $Rev: 590715 $, $Date: 2007-10-31 16:23:32 +0100 (Wed, 31 Oct 2007) $ 036 */ 037 public class EncryptionTypeDecoder 038 { 039 /** 040 * etype[8] SEQUENCE OF INTEGER, -- EncryptionType, 041 * -- in preference order 042 */ 043 protected static Set<EncryptionType> decode( DERSequence sequence ) 044 { 045 Set<EncryptionType> eTypes = new HashSet<EncryptionType>( sequence.size() ); 046 047 int ii = 0; 048 049 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) 050 { 051 DERInteger object = ( DERInteger ) e.nextElement(); 052 eTypes.add( EncryptionType.getTypeByOrdinal( object.intValue() ) ); 053 ii++; 054 } 055 056 return eTypes; 057 } 058 }