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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 }
    117