1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one or more
4 * contributor license agreements. See the NOTICE file distributed with
5 * this work for additional information regarding copyright ownership.
6 * The ASF licenses this file to You under the Apache License, Version 2.0
7 * (the "License"); you may not use this file except in compliance with
8 * 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, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.apache.geronimo.util.asn1.x509;
20
21 import org.apache.geronimo.util.asn1.ASN1Encodable;
22 import org.apache.geronimo.util.asn1.ASN1EncodableVector;
23 import org.apache.geronimo.util.asn1.ASN1Sequence;
24 import org.apache.geronimo.util.asn1.ASN1TaggedObject;
25 import org.apache.geronimo.util.asn1.DEREncodable;
26 import org.apache.geronimo.util.asn1.DERObject;
27 import org.apache.geronimo.util.asn1.DERObjectIdentifier;
28 import org.apache.geronimo.util.asn1.DERSequence;
29
30 public class AlgorithmIdentifier
31 extends ASN1Encodable
32 {
33 private DERObjectIdentifier objectId;
34 private DEREncodable parameters;
35 private boolean parametersDefined = false;
36
37 public static AlgorithmIdentifier getInstance(
38 ASN1TaggedObject obj,
39 boolean explicit)
40 {
41 return getInstance(ASN1Sequence.getInstance(obj, explicit));
42 }
43
44 public static AlgorithmIdentifier getInstance(
45 Object obj)
46 {
47 if (obj instanceof AlgorithmIdentifier)
48 {
49 return (AlgorithmIdentifier)obj;
50 }
51
52 if (obj instanceof DERObjectIdentifier)
53 {
54 return new AlgorithmIdentifier((DERObjectIdentifier)obj);
55 }
56
57 if (obj instanceof String)
58 {
59 return new AlgorithmIdentifier((String)obj);
60 }
61
62 if (obj instanceof ASN1Sequence)
63 {
64 return new AlgorithmIdentifier((ASN1Sequence)obj);
65 }
66
67 throw new IllegalArgumentException("unknown object in factory");
68 }
69
70 public AlgorithmIdentifier(
71 DERObjectIdentifier objectId)
72 {
73 this.objectId = objectId;
74 }
75
76 public AlgorithmIdentifier(
77 String objectId)
78 {
79 this.objectId = new DERObjectIdentifier(objectId);
80 }
81
82 public AlgorithmIdentifier(
83 DERObjectIdentifier objectId,
84 DEREncodable parameters)
85 {
86 parametersDefined = true;
87 this.objectId = objectId;
88 this.parameters = parameters;
89 }
90
91 public AlgorithmIdentifier(
92 ASN1Sequence seq)
93 {
94 objectId = (DERObjectIdentifier)seq.getObjectAt(0);
95
96 if (seq.size() == 2)
97 {
98 parametersDefined = true;
99 parameters = seq.getObjectAt(1);
100 }
101 else
102 {
103 parameters = null;
104 }
105 }
106
107 public DERObjectIdentifier getObjectId()
108 {
109 return objectId;
110 }
111
112 public DEREncodable getParameters()
113 {
114 return parameters;
115 }
116
117 /**
118 * Produce an object suitable for an ASN1OutputStream.
119 * <pre>
120 * AlgorithmIdentifier ::= SEQUENCE {
121 * algorithm OBJECT IDENTIFIER,
122 * parameters ANY DEFINED BY algorithm OPTIONAL }
123 * </pre>
124 */
125 public DERObject toASN1Object()
126 {
127 ASN1EncodableVector v = new ASN1EncodableVector();
128
129 v.add(objectId);
130
131 if (parametersDefined)
132 {
133 v.add(parameters);
134 }
135
136 return new DERSequence(v);
137 }
138 }