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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.x509;

import java.math.BigInteger;
import java.util.Date;
import java.util.Set;

import java.security.cert.*;

/**
 * <p>Abstract class for a revoked certificate in a CRL (Certificate 
 * Revocation List).
 *
 * The ASN.1 definition for <em>revokedCertificates</em> is:
 * <pre>
 * revokedCertificates    SEQUENCE OF SEQUENCE  {
 *     userCertificate    CertificateSerialNumber,
 *     revocationDate     ChoiceOfTime,
 *     crlEntryExtensions Extensions OPTIONAL
 *                        -- if present, must be v2
 * }  OPTIONAL
 *<p>
 * CertificateSerialNumber  ::=  INTEGER
 *<p>
 * Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
 *<p>
 * Extension  ::=  SEQUENCE  {
 *     extnId        OBJECT IDENTIFIER,
 *     critical      BOOLEAN DEFAULT FALSE,
 *     extnValue     OCTET STRING
 *                   -- contains a DER encoding of a value
 *                   -- of the type registered for use with
 *                   -- the extnId object identifier value
 * }
 * </pre>
 * 
 * @see X509CRL
 *
 * @author Hemma Prafullchandra
 * @version 1.4 97/12/10
 */

public abstract class RevokedCertificate extends X509CRLEntry {
/* implements X509Extension { */

    /**
     * Gets the serial number for this RevokedCertificate,
     * the <em>userCertificate</em>.
     * 
     * @return the serial number.
     */
    public abstract BigInteger getSerialNumber();

    /**
     * Gets the revocation date for this RevokedCertificate,
     * the <em>revocationDate</em>.
     * 
     * @return the revocation date.
     */
    public abstract Date getRevocationDate();

    /**
     * Returns true if this revoked certificate entry has
     * extensions.
     *
     * @return true if this entry has extensions, false otherwise.
     */
    public abstract boolean hasExtensions();

    /**
     * Returns a string representation of this revoked certificate.
     *
     * @return a string representation of this revoked certificate.
     */
    public abstract String toString();
}