jdk/src/share/classes/sun/security/x509/DeltaCRLIndicatorExtension.java
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/*
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 * Copyright 2005 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Sun designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Sun in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 */
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package sun.security.x509;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.math.BigInteger;
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import java.util.Enumeration;
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import sun.security.util.*;
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/**
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 * Represents the Delta CRL Indicator Extension.
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 *
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 * <p>
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 * The extension identifies a CRL as being a delta CRL.
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 * Delta CRLs contain updates to revocation information previously distributed,
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 * rather than all the information that would appear in a complete CRL.
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 * The extension contains a CRL number that identifies the CRL, complete for a
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 * given scope, that was used as the starting point in the generation of
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 * this delta CRL.
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 *
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 * <p>
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 * The extension is defined in Section 5.2.4 of
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 * <a href="http://www.ietf.org/rfc/rfc3280.txt">Internet X.509 PKI Certific
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ate and Certificate Revocation List (CRL) Profile</a>.
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 *
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 * <p>
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 * Its ASN.1 definition is as follows:
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 * <pre>
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 *     id-ce-deltaCRLIndicator OBJECT IDENTIFIER ::= { id-ce 27 }
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 *
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 *     BaseCRLNumber ::= CRLNumber
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 *     CRLNumber ::= INTEGER (0..MAX)
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 * </pre>
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 *
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 * @since 1.6
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 */
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public class DeltaCRLIndicatorExtension extends CRLNumberExtension {
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    /**
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     * Attribute name.
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     */
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    public static final String NAME = "DeltaCRLIndicator";
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    private static final String LABEL = "Base CRL Number";
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    /**
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     * Creates a delta CRL indicator extension with the integer value .
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     * The criticality is set to true.
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     *
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     * @param crlNum the value to be set for the extension.
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     */
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    public DeltaCRLIndicatorExtension(int crlNum) throws IOException {
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        super(PKIXExtensions.DeltaCRLIndicator_Id, true,
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            BigInteger.valueOf(crlNum), NAME, LABEL);
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    }
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    /**
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     * Creates a delta CRL indictor extension with the BigInteger value .
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     * The criticality is set to true.
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     *
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     * @param crlNum the value to be set for the extension.
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     */
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    public DeltaCRLIndicatorExtension(BigInteger crlNum) throws IOException {
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        super(PKIXExtensions.DeltaCRLIndicator_Id, true, crlNum, NAME, LABEL);
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    }
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    /**
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     * Creates the extension from the passed DER encoded value of the same.
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     *
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     * @param critical true if the extension is to be treated as critical.
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     * @param value an array of DER encoded bytes of the actual value.
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     * @exception ClassCastException if value is not an array of bytes
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     * @exception IOException on decoding error.
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     */
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    public DeltaCRLIndicatorExtension(Boolean critical, Object value)
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    throws IOException {
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        super(PKIXExtensions.DeltaCRLIndicator_Id, critical.booleanValue(),
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            value, NAME, LABEL);
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    }
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    /**
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     * Writes the extension to the DerOutputStream.
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     *
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     * @param out the DerOutputStream to write the extension to.
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     * @exception IOException on encoding errors.
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     */
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    public void encode(OutputStream out) throws IOException {
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       DerOutputStream  tmp = new DerOutputStream();
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        super.encode(out, PKIXExtensions.DeltaCRLIndicator_Id, true);
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    }
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}