001 /**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one or more
004 * contributor license agreements. See the NOTICE file distributed with
005 * this work for additional information regarding copyright ownership.
006 * The ASF licenses this file to You under the Apache License, Version 2.0
007 * (the "License"); you may not use this file except in compliance with
008 * the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019 package org.apache.geronimo.util.asn1;
020
021 import java.io.ByteArrayOutputStream;
022 import java.io.IOException;
023 import java.util.Enumeration;
024 import java.util.Vector;
025
026 public abstract class ASN1OctetString
027 extends DERObject
028 {
029 byte[] string;
030
031 /**
032 * return an Octet String from a tagged object.
033 *
034 * @param obj the tagged object holding the object we want.
035 * @param explicit true if the object is meant to be explicitly
036 * tagged false otherwise.
037 * @exception IllegalArgumentException if the tagged object cannot
038 * be converted.
039 */
040 public static ASN1OctetString getInstance(
041 ASN1TaggedObject obj,
042 boolean explicit)
043 {
044 return getInstance(obj.getObject());
045 }
046
047 /**
048 * return an Octet String from the given object.
049 *
050 * @param obj the object we want converted.
051 * @exception IllegalArgumentException if the object cannot be converted.
052 */
053 public static ASN1OctetString getInstance(
054 Object obj)
055 {
056 if (obj == null || obj instanceof ASN1OctetString)
057 {
058 return (ASN1OctetString)obj;
059 }
060
061 if (obj instanceof ASN1TaggedObject)
062 {
063 return getInstance(((ASN1TaggedObject)obj).getObject());
064 }
065
066 if (obj instanceof ASN1Sequence)
067 {
068 Vector v = new Vector();
069 Enumeration e = ((ASN1Sequence)obj).getObjects();
070
071 while (e.hasMoreElements())
072 {
073 v.addElement(e.nextElement());
074 }
075
076 return new BERConstructedOctetString(v);
077 }
078
079 throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
080 }
081
082 /**
083 * @param string the octets making up the octet string.
084 */
085 public ASN1OctetString(
086 byte[] string)
087 {
088 this.string = string;
089 }
090
091 public ASN1OctetString(
092 DEREncodable obj)
093 {
094 try
095 {
096 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
097 DEROutputStream dOut = new DEROutputStream(bOut);
098
099 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 }