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;
20
21 import java.io.ByteArrayOutputStream;
22 import java.io.IOException;
23 import java.util.Enumeration;
24 import java.util.Vector;
25
26 public abstract class ASN1OctetString
27 extends DERObject
28 {
29 byte[] string;
30
31 /**
32 * return an Octet String from a tagged object.
33 *
34 * @param obj the tagged object holding the object we want.
35 * @param explicit true if the object is meant to be explicitly
36 * tagged false otherwise.
37 * @exception IllegalArgumentException if the tagged object cannot
38 * be converted.
39 */
40 public static ASN1OctetString getInstance(
41 ASN1TaggedObject obj,
42 boolean explicit)
43 {
44 return getInstance(obj.getObject());
45 }
46
47 /**
48 * return an Octet String from the given object.
49 *
50 * @param obj the object we want converted.
51 * @exception IllegalArgumentException if the object cannot be converted.
52 */
53 public static ASN1OctetString getInstance(
54 Object obj)
55 {
56 if (obj == null || obj instanceof ASN1OctetString)
57 {
58 return (ASN1OctetString)obj;
59 }
60
61 if (obj instanceof ASN1TaggedObject)
62 {
63 return getInstance(((ASN1TaggedObject)obj).getObject());
64 }
65
66 if (obj instanceof ASN1Sequence)
67 {
68 Vector v = new Vector();
69 Enumeration e = ((ASN1Sequence)obj).getObjects();
70
71 while (e.hasMoreElements())
72 {
73 v.addElement(e.nextElement());
74 }
75
76 return new BERConstructedOctetString(v);
77 }
78
79 throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
80 }
81
82 /**
83 * @param string the octets making up the octet string.
84 */
85 public ASN1OctetString(
86 byte[] string)
87 {
88 this.string = string;
89 }
90
91 public ASN1OctetString(
92 DEREncodable obj)
93 {
94 try
95 {
96 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
97 DEROutputStream dOut = new DEROutputStream(bOut);
98
99 dOut.writeObject(obj);
100 dOut.close();
101
102 this.string = bOut.toByteArray();
103 }
104 catch (IOException e)
105 {
106 throw new IllegalArgumentException("Error processing object : " + e.toString());
107 }
108 }
109
110 public byte[] getOctets()
111 {
112 return string;
113 }
114
115 public int hashCode()
116 {
117 byte[] b = this.getOctets();
118 int value = 0;
119
120 for (int i = 0; i != b.length; i++)
121 {
122 value ^= (b[i] & 0xff) << (i % 4);
123 }
124
125 return value;
126 }
127
128 public boolean equals(
129 Object o)
130 {
131 if (o == null || !(o instanceof DEROctetString))
132 {
133 return false;
134 }
135
136 DEROctetString other = (DEROctetString)o;
137
138 byte[] b1 = other.getOctets();
139 byte[] b2 = this.getOctets();
140
141 if (b1.length != b2.length)
142 {
143 return false;
144 }
145
146 for (int i = 0; i != b1.length; i++)
147 {
148 if (b1[i] != b2[i])
149 {
150 return false;
151 }
152 }
153
154 return true;
155 }
156
157 abstract void encode(DEROutputStream out)
158 throws IOException;
159 }