KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > maverick > crypto > asn1 > DERConstructedSet


1 /*
2  * SSL-Explorer
3  *
4  * Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version 2 of
9  * the License, or (at your option) any later version.
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  */
19             
20 package com.maverick.crypto.asn1;
21
22 import java.io.ByteArrayOutputStream JavaDoc;
23 import java.io.IOException JavaDoc;
24 import java.util.Enumeration JavaDoc;
25
26 public class DERConstructedSet
27     extends ASN1Set
28 {
29     public DERConstructedSet()
30     {
31     }
32
33     /**
34      * @param obj - a single object that makes up the set.
35      */
36     public DERConstructedSet(
37         DEREncodable obj)
38     {
39         this.addObject(obj);
40     }
41
42     /**
43      * @param v - a vector of objects making up the set.
44      */
45     public DERConstructedSet(
46         DEREncodableVector v)
47     {
48         for (int i = 0; i != v.size(); i++)
49         {
50             this.addObject(v.get(i));
51         }
52     }
53
54     public void addObject(
55         DEREncodable obj)
56     {
57         super.addObject(obj);
58     }
59
60     public int getSize()
61     {
62         return size();
63     }
64
65     /*
66      * A note on the implementation:
67      * <p>
68      * As DER requires the constructed, definite-length model to
69      * be used for structured types, this varies slightly from the
70      * ASN.1 descriptions given. Rather than just outputing SET,
71      * we also have to specify CONSTRUCTED, and the objects length.
72      */
73     void encode(
74         DEROutputStream out)
75         throws IOException JavaDoc
76     {
77         ByteArrayOutputStream JavaDoc bOut = new ByteArrayOutputStream JavaDoc();
78         DEROutputStream dOut = new DEROutputStream(bOut);
79         Enumeration JavaDoc e = this.getObjects();
80
81         while (e.hasMoreElements())
82         {
83             Object JavaDoc obj = e.nextElement();
84
85             dOut.writeObject(obj);
86         }
87
88         dOut.close();
89
90         byte[] bytes = bOut.toByteArray();
91
92         out.writeEncoded(SET | CONSTRUCTED, bytes);
93     }
94 }
95
Popular Tags