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.crypto.asn1;
019
020 import java.io.IOException;
021
022 /**
023 * DER BMPString object.
024 */
025 public class DERBMPString
026 extends DERObject
027 implements DERString
028 {
029 String string;
030
031 /**
032 * return a BMP String from the given object.
033 *
034 * @param obj the object we want converted.
035 * @exception IllegalArgumentException if the object cannot be converted.
036 */
037 public static DERBMPString getInstance(
038 Object obj)
039 {
040 if (obj == null || obj instanceof DERBMPString)
041 {
042 return (DERBMPString)obj;
043 }
044
045 if (obj instanceof ASN1OctetString)
046 {
047 return new DERBMPString(((ASN1OctetString)obj).getOctets());
048 }
049
050 if (obj instanceof ASN1TaggedObject)
051 {
052 return getInstance(((ASN1TaggedObject)obj).getObject());
053 }
054
055 throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
056 }
057
058 /**
059 * return a BMP String from a tagged object.
060 *
061 * @param obj the tagged object holding the object we want
062 * @param explicit true if the object is meant to be explicitly
063 * tagged false otherwise.
064 * @exception IllegalArgumentException if the tagged object cannot
065 * be converted.
066 */
067 public static DERBMPString getInstance(
068 ASN1TaggedObject obj,
069 boolean explicit)
070 {
071 return getInstance(obj.getObject());
072 }
073
074
075 /**
076 * basic constructor - byte encoded string.
077 */
078 public DERBMPString(
079 byte[] string)
080 {
081 char[] cs = new char[string.length / 2];
082
083 for (int i = 0; i != cs.length; i++)
084 {
085 cs[i] = (char)((string[2 * i] << 8) | (string[2 * i + 1] & 0xff));
086 }
087
088 this.string = new String(cs);
089 }
090
091 /**
092 * basic constructor
093 */
094 public DERBMPString(
095 String string)
096 {
097 this.string = string;
098 }
099
100 public String getString()
101 {
102 return string;
103 }
104
105 public int hashCode()
106 {
107 return this.getString().hashCode();
108 }
109
110 public boolean equals(
111 Object o)
112 {
113 if (!(o instanceof DERBMPString))
114 {
115 return false;
116 }
117
118 DERBMPString s = (DERBMPString)o;
119
120 return this.getString().equals(s.getString());
121 }
122
123 void encode(
124 DEROutputStream out)
125 throws IOException
126 {
127 char[] c = string.toCharArray();
128 byte[] b = new byte[c.length * 2];
129
130 for (int i = 0; i != c.length; i++)
131 {
132 b[2 * i] = (byte)(c[i] >> 8);
133 b[2 * i + 1] = (byte)c[i];
134 }
135
136 out.writeEncoded(BMP_STRING, b);
137 }
138 }