1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.server.kerberos.shared.io.decoder;
21
22
23 import java.util.Enumeration;
24 import java.util.HashSet;
25 import java.util.Set;
26
27 import org.apache.directory.server.kerberos.shared.crypto.encryption.EncryptionType;
28 import org.apache.directory.shared.asn1.der.DEREncodable;
29 import org.apache.directory.shared.asn1.der.DERInteger;
30 import org.apache.directory.shared.asn1.der.DERSequence;
31
32
33 /**
34 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
35 * @version $Rev: 590715 $, $Date: 2007-10-31 16:23:32 +0100 (Mi, 31 Okt 2007) $
36 */
37 public class EncryptionTypeDecoder
38 {
39 /**
40 * etype[8] SEQUENCE OF INTEGER, -- EncryptionType,
41 * -- in preference order
42 */
43 protected static Set<EncryptionType> decode( DERSequence sequence )
44 {
45 Set<EncryptionType> eTypes = new HashSet<EncryptionType>( sequence.size() );
46
47 int ii = 0;
48
49 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); )
50 {
51 DERInteger object = ( DERInteger ) e.nextElement();
52 eTypes.add( EncryptionType.getTypeByOrdinal( object.intValue() ) );
53 ii++;
54 }
55
56 return eTypes;
57 }
58 }