001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.geronimo.util.asn1.x509;
019
020 import org.apache.geronimo.util.asn1.ASN1Encodable;
021 import org.apache.geronimo.util.asn1.ASN1EncodableVector;
022 import org.apache.geronimo.util.asn1.ASN1Sequence;
023 import org.apache.geronimo.util.asn1.ASN1TaggedObject;
024 import org.apache.geronimo.util.asn1.DEREncodable;
025 import org.apache.geronimo.util.asn1.DERObject;
026 import org.apache.geronimo.util.asn1.DERObjectIdentifier;
027 import org.apache.geronimo.util.asn1.DERSequence;
028
029 public class AlgorithmIdentifier
030 extends ASN1Encodable
031 {
032 private DERObjectIdentifier objectId;
033 private DEREncodable parameters;
034 private boolean parametersDefined = false;
035
036 public static AlgorithmIdentifier getInstance(
037 ASN1TaggedObject obj,
038 boolean explicit)
039 {
040 return getInstance(ASN1Sequence.getInstance(obj, explicit));
041 }
042
043 public static AlgorithmIdentifier getInstance(
044 Object obj)
045 {
046 if (obj instanceof AlgorithmIdentifier)
047 {
048 return (AlgorithmIdentifier)obj;
049 }
050
051 if (obj instanceof DERObjectIdentifier)
052 {
053 return new AlgorithmIdentifier((DERObjectIdentifier)obj);
054 }
055
056 if (obj instanceof String)
057 {
058 return new AlgorithmIdentifier((String)obj);
059 }
060
061 if (obj instanceof ASN1Sequence)
062 {
063 return new AlgorithmIdentifier((ASN1Sequence)obj);
064 }
065
066 throw new IllegalArgumentException("unknown object in factory");
067 }
068
069 public AlgorithmIdentifier(
070 DERObjectIdentifier objectId)
071 {
072 this.objectId = objectId;
073 }
074
075 public AlgorithmIdentifier(
076 String objectId)
077 {
078 this.objectId = new DERObjectIdentifier(objectId);
079 }
080
081 public AlgorithmIdentifier(
082 DERObjectIdentifier objectId,
083 DEREncodable parameters)
084 {
085 parametersDefined = true;
086 this.objectId = objectId;
087 this.parameters = parameters;
088 }
089
090 public AlgorithmIdentifier(
091 ASN1Sequence seq)
092 {
093 objectId = (DERObjectIdentifier)seq.getObjectAt(0);
094
095 if (seq.size() == 2)
096 {
097 parametersDefined = true;
098 parameters = seq.getObjectAt(1);
099 }
100 else
101 {
102 parameters = null;
103 }
104 }
105
106 public DERObjectIdentifier getObjectId()
107 {
108 return objectId;
109 }
110
111 public DEREncodable getParameters()
112 {
113 return parameters;
114 }
115
116 /**
117 * Produce an object suitable for an ASN1OutputStream.
118 * <pre>
119 * AlgorithmIdentifier ::= SEQUENCE {
120 * algorithm OBJECT IDENTIFIER,
121 * parameters ANY DEFINED BY algorithm OPTIONAL }
122 * </pre>
123 */
124 public DERObject toASN1Object()
125 {
126 ASN1EncodableVector v = new ASN1EncodableVector();
127
128 v.add(objectId);
129
130 if (parametersDefined)
131 {
132 v.add(parameters);
133 }
134
135 return new DERSequence(v);
136 }
137 }