Java example source code file (X509CRLEntry.java)

This example Java source code file (X509CRLEntry.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

biginteger, crlexception, crlreason, date, math, string, util, x500principal, x509crlentry, x509extension

The X509CRLEntry.java Java example source code

/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package java.security.cert;

import java.math.BigInteger;
import java.util.Date;
import javax.security.auth.x500.X500Principal;

import sun.security.x509.X509CRLEntryImpl;

/**
 * <p>Abstract class for a revoked certificate in a CRL (Certificate
 * Revocation List).
 *
 * The ASN.1 definition for <em>revokedCertificates is:
 * <pre>
 * revokedCertificates    SEQUENCE OF SEQUENCE  {
 *     userCertificate    CertificateSerialNumber,
 *     revocationDate     ChoiceOfTime,
 *     crlEntryExtensions Extensions OPTIONAL
 *                        -- if present, must be v2
 * }  OPTIONAL
 *
 * CertificateSerialNumber  ::=  INTEGER
 *
 * Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
 *
 * 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
 * @see X509Extension
 *
 * @author Hemma Prafullchandra
 */

public abstract class X509CRLEntry implements X509Extension {

    /**
     * Compares this CRL entry for equality with the given
     * object. If the {@code other} object is an
     * {@code instanceof} {@code X509CRLEntry}, then
     * its encoded form (the inner SEQUENCE) is retrieved and compared
     * with the encoded form of this CRL entry.
     *
     * @param other the object to test for equality with this CRL entry.
     * @return true iff the encoded forms of the two CRL entries
     * match, false otherwise.
     */
    public boolean equals(Object other) {
        if (this == other)
            return true;
        if (!(other instanceof X509CRLEntry))
            return false;
        try {
            byte[] thisCRLEntry = this.getEncoded();
            byte[] otherCRLEntry = ((X509CRLEntry)other).getEncoded();

            if (thisCRLEntry.length != otherCRLEntry.length)
                return false;
            for (int i = 0; i < thisCRLEntry.length; i++)
                 if (thisCRLEntry[i] != otherCRLEntry[i])
                     return false;
        } catch (CRLException ce) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hashcode value for this CRL entry from its
     * encoded form.
     *
     * @return the hashcode value.
     */
    public int hashCode() {
        int     retval = 0;
        try {
            byte[] entryData = this.getEncoded();
            for (int i = 1; i < entryData.length; i++)
                 retval += entryData[i] * i;

        } catch (CRLException ce) {
            return(retval);
        }
        return(retval);
    }

    /**
     * Returns the ASN.1 DER-encoded form of this CRL Entry,
     * that is the inner SEQUENCE.
     *
     * @return the encoded form of this certificate
     * @exception CRLException if an encoding error occurs.
     */
    public abstract byte[] getEncoded() throws CRLException;

    /**
     * Gets the serial number from this X509CRLEntry,
     * the <em>userCertificate.
     *
     * @return the serial number.
     */
    public abstract BigInteger getSerialNumber();

    /**
     * Get the issuer of the X509Certificate described by this entry. If
     * the certificate issuer is also the CRL issuer, this method returns
     * null.
     *
     * <p>This method is used with indirect CRLs. The default implementation
     * always returns null. Subclasses that wish to support indirect CRLs
     * should override it.
     *
     * @return the issuer of the X509Certificate described by this entry
     * or null if it is issued by the CRL issuer.
     *
     * @since 1.5
     */
    public X500Principal getCertificateIssuer() {
        return null;
    }

    /**
     * Gets the revocation date from this X509CRLEntry,
     * the <em>revocationDate.
     *
     * @return the revocation date.
     */
    public abstract Date getRevocationDate();

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

    /**
     * Returns a string representation of this CRL entry.
     *
     * @return a string representation of this CRL entry.
     */
    public abstract String toString();

    /**
     * Returns the reason the certificate has been revoked, as specified
     * in the Reason Code extension of this CRL entry.
     *
     * @return the reason the certificate has been revoked, or
     *    {@code null} if this CRL entry does not have
     *    a Reason Code extension
     * @since 1.7
     */
    public CRLReason getRevocationReason() {
        if (!hasExtensions()) {
            return null;
        }
        return X509CRLEntryImpl.getRevocationReason(this);
    }
}