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 java.math.BigInteger;
22 import java.util.Enumeration;
23
24 import org.apache.geronimo.util.asn1.ASN1Encodable;
25 import org.apache.geronimo.util.asn1.ASN1EncodableVector;
26 import org.apache.geronimo.util.asn1.ASN1Sequence;
27 import org.apache.geronimo.util.asn1.ASN1TaggedObject;
28 import org.apache.geronimo.util.asn1.DERInteger;
29 import org.apache.geronimo.util.asn1.DERObject;
30 import org.apache.geronimo.util.asn1.DERSequence;
31
32 public class DSAParameter
33 extends ASN1Encodable
34 {
35 DERInteger p, q, g;
36
37 public static DSAParameter getInstance(
38 ASN1TaggedObject obj,
39 boolean explicit)
40 {
41 return getInstance(ASN1Sequence.getInstance(obj, explicit));
42 }
43
44 public static DSAParameter getInstance(
45 Object obj)
46 {
47 if(obj == null || obj instanceof DSAParameter)
48 {
49 return (DSAParameter)obj;
50 }
51
52 if(obj instanceof ASN1Sequence)
53 {
54 return new DSAParameter((ASN1Sequence)obj);
55 }
56
57 throw new IllegalArgumentException("Invalid DSAParameter: " + obj.getClass().getName());
58 }
59
60 public DSAParameter(
61 BigInteger p,
62 BigInteger q,
63 BigInteger g)
64 {
65 this.p = new DERInteger(p);
66 this.q = new DERInteger(q);
67 this.g = new DERInteger(g);
68 }
69
70 public DSAParameter(
71 ASN1Sequence seq)
72 {
73 Enumeration e = seq.getObjects();
74
75 p = (DERInteger)e.nextElement();
76 q = (DERInteger)e.nextElement();
77 g = (DERInteger)e.nextElement();
78 }
79
80 public BigInteger getP()
81 {
82 return p.getPositiveValue();
83 }
84
85 public BigInteger getQ()
86 {
87 return q.getPositiveValue();
88 }
89
90 public BigInteger getG()
91 {
92 return g.getPositiveValue();
93 }
94
95 public DERObject toASN1Object()
96 {
97 ASN1EncodableVector v = new ASN1EncodableVector();
98
99 v.add(p);
100 v.add(q);
101 v.add(g);
102
103 return new DERSequence(v);
104 }
105 }