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1   /*
2    * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package sun.security.x509;
27  
28  import java.io.IOException;
29  import java.io.OutputStream;
30  import java.math.BigInteger;
31  import java.util.Enumeration;
32  
33  import sun.security.util.*;
34  
35  /**
36   * Represents the Delta CRL Indicator Extension.
37   *
38   * <p>
39   * The extension identifies a CRL as being a delta CRL.
40   * Delta CRLs contain updates to revocation information previously distributed,
41   * rather than all the information that would appear in a complete CRL.
42   * The extension contains a CRL number that identifies the CRL, complete for a
43   * given scope, that was used as the starting point in the generation of
44   * this delta CRL.
45   *
46   * <p>
47   * The extension is defined in Section 5.2.4 of
48   * <a href="http://www.ietf.org/rfc/rfc3280.txt">Internet X.509 PKI Certific
49  ate and Certificate Revocation List (CRL) Profile</a>.
50   *
51   * <p>
52   * Its ASN.1 definition is as follows:
53   * <pre>
54   *     id-ce-deltaCRLIndicator OBJECT IDENTIFIER ::= { id-ce 27 }
55   *
56   *     BaseCRLNumber ::= CRLNumber
57   *     CRLNumber ::= INTEGER (0..MAX)
58   * </pre>
59   *
60   * @since 1.6
61   */
62  public class DeltaCRLIndicatorExtension extends CRLNumberExtension {
63  
64      /**
65       * Attribute name.
66       */
67      public static final String NAME = "DeltaCRLIndicator";
68  
69      private static final String LABEL = "Base CRL Number";
70  
71      /**
72       * Creates a delta CRL indicator extension with the integer value .
73       * The criticality is set to true.
74       *
75       * @param crlNum the value to be set for the extension.
76       */
77      public DeltaCRLIndicatorExtension(int crlNum) throws IOException {
78          super(PKIXExtensions.DeltaCRLIndicator_Id, true,
79              BigInteger.valueOf(crlNum), NAME, LABEL);
80      }
81  
82      /**
83       * Creates a delta CRL indictor extension with the BigInteger value .
84       * The criticality is set to true.
85       *
86       * @param crlNum the value to be set for the extension.
87       */
88      public DeltaCRLIndicatorExtension(BigInteger crlNum) throws IOException {
89          super(PKIXExtensions.DeltaCRLIndicator_Id, true, crlNum, NAME, LABEL);
90      }
91  
92      /**
93       * Creates the extension from the passed DER encoded value of the same.
94       *
95       * @param critical true if the extension is to be treated as critical.
96       * @param value an array of DER encoded bytes of the actual value.
97       * @exception ClassCastException if value is not an array of bytes
98       * @exception IOException on decoding error.
99       */
100     public DeltaCRLIndicatorExtension(Boolean critical, Object value)
101     throws IOException {
102         super(PKIXExtensions.DeltaCRLIndicator_Id, critical.booleanValue(),
103             value, NAME, LABEL);
104     }
105 
106     /**
107      * Writes the extension to the DerOutputStream.
108      *
109      * @param out the DerOutputStream to write the extension to.
110      * @exception IOException on encoding errors.
111      */
112     public void encode(OutputStream out) throws IOException {
113        DerOutputStream  tmp = new DerOutputStream();
114         super.encode(out, PKIXExtensions.DeltaCRLIndicator_Id, true);
115     }
116 }