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 RSAPublicKeyStructure
33 extends ASN1Encodable
34 {
35 private BigInteger modulus;
36 private BigInteger publicExponent;
37
38 public static RSAPublicKeyStructure getInstance(
39 ASN1TaggedObject obj,
40 boolean explicit)
41 {
42 return getInstance(ASN1Sequence.getInstance(obj, explicit));
43 }
44
45 public static RSAPublicKeyStructure getInstance(
46 Object obj)
47 {
48 if(obj == null || obj instanceof RSAPublicKeyStructure)
49 {
50 return (RSAPublicKeyStructure)obj;
51 }
52
53 if(obj instanceof ASN1Sequence)
54 {
55 return new RSAPublicKeyStructure((ASN1Sequence)obj);
56 }
57
58 throw new IllegalArgumentException("Invalid RSAPublicKeyStructure: " + obj.getClass().getName());
59 }
60
61 public RSAPublicKeyStructure(
62 BigInteger modulus,
63 BigInteger publicExponent)
64 {
65 this.modulus = modulus;
66 this.publicExponent = publicExponent;
67 }
68
69 public RSAPublicKeyStructure(
70 ASN1Sequence seq)
71 {
72 Enumeration e = seq.getObjects();
73
74 modulus = ((DERInteger)e.nextElement()).getPositiveValue();
75 publicExponent = ((DERInteger)e.nextElement()).getPositiveValue();
76 }
77
78 public BigInteger getModulus()
79 {
80 return modulus;
81 }
82
83 public BigInteger getPublicExponent()
84 {
85 return publicExponent;
86 }
87
88 /**
89 * This outputs the key in PKCS1v2 format.
90 * <pre>
91 * RSAPublicKey ::= SEQUENCE {
92 * modulus INTEGER, -- n
93 * publicExponent INTEGER, -- e
94 * }
95 * </pre>
96 * <p>
97 */
98 public DERObject toASN1Object()
99 {
100 ASN1EncodableVector v = new ASN1EncodableVector();
101
102 v.add(new DERInteger(getModulus()));
103 v.add(new DERInteger(getPublicExponent()));
104
105 return new DERSequence(v);
106 }
107 }