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Java example source code file (InvalidityDateExtension.java)

This example Java source code file (InvalidityDateExtension.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

attributenameenumeration, certattrset, date, deroutputstream, dervalue, invaliditydateextension, ioexception, name, object, string, util

The InvalidityDateExtension.java Java example source code

/*
 * Copyright (c) 2007, 2011, 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 sun.security.x509;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;
import java.util.Enumeration;

import sun.security.util.*;

/**
 * From RFC 3280:
 * <p>
 * The invalidity date is a non-critical CRL entry extension that
 * provides the date on which it is known or suspected that the private
 * key was compromised or that the certificate otherwise became invalid.
 * This date may be earlier than the revocation date in the CRL entry,
 * which is the date at which the CA processed the revocation.  When a
 * revocation is first posted by a CRL issuer in a CRL, the invalidity
 * date may precede the date of issue of earlier CRLs, but the
 * revocation date SHOULD NOT precede the date of issue of earlier CRLs.
 * Whenever this information is available, CRL issuers are strongly
 * encouraged to share it with CRL users.
 * <p>
 * The GeneralizedTime values included in this field MUST be expressed
 * in Greenwich Mean Time (Zulu), and MUST be specified and interpreted
 * as defined in section 4.1.2.5.2.
 * <pre>
 * id-ce-invalidityDate OBJECT IDENTIFIER ::= { id-ce 24 }
 *
 * invalidityDate ::=  GeneralizedTime
 * </pre>
 *
 * @author Sean Mullan
 */
public class InvalidityDateExtension extends Extension
    implements CertAttrSet<String> {

    /**
     * Attribute name and Reason codes
     */
    public static final String NAME = "InvalidityDate";
    public static final String DATE = "date";

    private Date date;

    private void encodeThis() throws IOException {
        if (date == null) {
            this.extensionValue = null;
            return;
        }
        DerOutputStream dos = new DerOutputStream();
        dos.putGeneralizedTime(date);
        this.extensionValue = dos.toByteArray();
    }

    /**
     * Create a InvalidityDateExtension with the passed in date.
     * Criticality automatically set to false.
     *
     * @param date the invalidity date
     */
    public InvalidityDateExtension(Date date) throws IOException {
        this(false, date);
    }

    /**
     * Create a InvalidityDateExtension with the passed in date.
     *
     * @param critical true if the extension is to be treated as critical.
     * @param date the invalidity date
     */
    public InvalidityDateExtension(boolean critical, Date date)
    throws IOException {
        this.extensionId = PKIXExtensions.InvalidityDate_Id;
        this.critical = critical;
        this.date = date;
        encodeThis();
    }

    /**
     * Create the extension from the passed DER encoded value of the same.
     *
     * @param critical true if the extension is to be treated as critical.
     * @param value an array of DER encoded bytes of the actual value.
     * @exception ClassCastException if value is not an array of bytes
     * @exception IOException on error.
     */
    public InvalidityDateExtension(Boolean critical, Object value)
    throws IOException {
        this.extensionId = PKIXExtensions.InvalidityDate_Id;
        this.critical = critical.booleanValue();
        this.extensionValue = (byte[]) value;
        DerValue val = new DerValue(this.extensionValue);
        this.date = val.getGeneralizedTime();
    }

    /**
     * Set the attribute value.
     */
    public void set(String name, Object obj) throws IOException {
        if (!(obj instanceof Date)) {
            throw new IOException("Attribute must be of type Date.");
        }
        if (name.equalsIgnoreCase(DATE)) {
            date = (Date) obj;
        } else {
            throw new IOException
                ("Name not supported by InvalidityDateExtension");
        }
        encodeThis();
    }

    /**
     * Get the attribute value.
     */
    public Date get(String name) throws IOException {
        if (name.equalsIgnoreCase(DATE)) {
            if (date == null) {
                return null;
            } else {
                return (new Date(date.getTime()));    // clone
            }
        } else {
            throw new IOException
                ("Name not supported by InvalidityDateExtension");
        }
    }

    /**
     * Delete the attribute value.
     */
    public void delete(String name) throws IOException {
        if (name.equalsIgnoreCase(DATE)) {
            date = null;
        } else {
            throw new IOException
                ("Name not supported by InvalidityDateExtension");
        }
        encodeThis();
    }

    /**
     * Returns a printable representation of the Invalidity Date.
     */
    public String toString() {
        return super.toString() + "    Invalidity Date: " + String.valueOf(date);
    }

    /**
     * Write the extension to the DerOutputStream.
     *
     * @param out the DerOutputStream to write the extension to
     * @exception IOException on encoding errors
     */
    public void encode(OutputStream out) throws IOException {
        DerOutputStream  tmp = new DerOutputStream();

        if (this.extensionValue == null) {
            this.extensionId = PKIXExtensions.InvalidityDate_Id;
            this.critical = false;
            encodeThis();
        }
        super.encode(tmp);
        out.write(tmp.toByteArray());
    }

    /**
     * Return an enumeration of names of attributes existing within this
     * attribute.
     */
    public Enumeration<String> getElements() {
        AttributeNameEnumeration elements = new AttributeNameEnumeration();
        elements.addElement(DATE);

        return elements.elements();
    }

    /**
     * Return the name of this attribute.
     */
    public String getName() {
        return NAME;
    }

    public static InvalidityDateExtension toImpl(java.security.cert.Extension ext)
        throws IOException {
        if (ext instanceof InvalidityDateExtension) {
            return (InvalidityDateExtension) ext;
        } else {
            return new InvalidityDateExtension
                (Boolean.valueOf(ext.isCritical()), ext.getValue());
        }
    }
}

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