Java example source code file (OrderAndDup.java)

This example Java source code file (OrderAndDup.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, bytearrayinputstream, date, derinputstream, dervalue, exception, keypairgenerator, math, orderanddup, security, sha1withrsa, util, wrong, x500name, x509crlentry, x509crlentryimpl, x509crlimpl

The OrderAndDup.java Java example source code

/*
 * Copyright (c) 2012, 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.
 *
 * 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.
 */

/*
 * @test
 * @bug 7143872
 * @summary Improve certificate extension processing
 */
import java.io.ByteArrayInputStream;
import java.math.BigInteger;
import java.security.KeyPairGenerator;
import java.security.cert.CertificateFactory;
import java.security.cert.X509CRLEntry;
import java.util.Date;
import sun.security.util.DerInputStream;
import sun.security.util.DerValue;
import sun.security.x509.*;

public class OrderAndDup {
    public static void main(String[] args) throws Exception {

        // Generate 20 serial numbers with dup and a special order
        int count = 20;
        BigInteger[] serials = new BigInteger[count];
        for (int i=0; i<count; i++) {
            serials[i] = BigInteger.valueOf(i*7%10);
        }

        // Generates a CRL
        X509CRLEntry[] badCerts = new X509CRLEntry[count];
        for (int i=0; i<count; i++) {
            badCerts[i] = new X509CRLEntryImpl(serials[i],
                    new Date(System.currentTimeMillis()+i*1000));
        }
        X500Name owner = new X500Name("CN=CA");
        X509CRLImpl crl = new X509CRLImpl(owner, new Date(), new Date(), badCerts);
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        crl.sign(kpg.genKeyPair().getPrivate(), "SHA1withRSA");
        byte[] data = crl.getEncodedInternal();

        // Check the encoding
        checkData(crl, data, serials);

        // Load a CRL from raw data
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        X509CRLImpl crl2 = (X509CRLImpl)cf.generateCRL(new ByteArrayInputStream(data));

        // Check the encoding again
        data = crl2.getEncodedInternal();
        checkData(crl2, data, serials);
    }

    // Check the raw data's ASN.1 structure to see if the revoked certs
    // have the same number and correct order as inserted
    static void checkData(X509CRLImpl c, byte[] data, BigInteger[] expected)
            throws Exception {
        if (c.getRevokedCertificates().size() != expected.length) {
            throw new Exception("Wrong count in CRL object, now " +
                    c.getRevokedCertificates().size());
        }
        DerValue d1 = new DerValue(data);
        // revokedCertificates at 5th place of TBSCertList
        DerValue[] d2 = new DerInputStream(
                d1.data.getSequence(0)[4].toByteArray())
                .getSequence(0);
        if (d2.length != expected.length) {
            throw new Exception("Wrong count in raw data, now " + d2.length);
        }
        for (int i=0; i<d2.length; i++) {
            // Serial is first in revokedCertificates entry
            BigInteger bi = d2[i].data.getBigInteger();
            if (!bi.equals(expected[i])) {
                throw new Exception("Entry at #" + i + " is " + bi
                        + ", should be " + expected[i]);
            }
        }
    }
}