Java example source code file (VerifyNameConstraints.java)

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Java - Java tags/keywords

arraylist, bytearrayoutputstream, certificatefactory, certpath, certpathvalidatorresult, exception, fileinputstream, ioexception, pkixparameters, set, string, trustanchor, util, verifynameconstraints, x509certificate

The VerifyNameConstraints.java Java example source code

/*
 * Copyright (c) 2001, 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 4458778
 * @summary verify name constraints check for min and max fields
 */

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.IOException;

import java.security.cert.CertificateFactory;
import java.security.cert.CertPath;
import java.security.cert.CertPathValidator;
import java.security.cert.CertPathValidatorException;
import java.security.cert.CertPathValidatorResult;
import java.security.cert.PKIXParameters;
import java.security.cert.TrustAnchor;
import java.security.cert.X509Certificate;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

public final class VerifyNameConstraints {

    private static PKIXParameters params;
    private static CertPath path;

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

        String[] certs = { "sun.cer", "sun2labs2.cer", "labs2isrg2.cer" };
        try {
            createPath(certs);
            validate(path, params);
            throw new Exception
                ("CertPath should not have been validated succesfully");
        } catch (CertPathValidatorException cve) {
            System.out.println("Test failed as expected: " + cve);
        }
    }

    public static void createPath(String[] certs) throws Exception {
        TrustAnchor anchor = new TrustAnchor(getCertFromFile(certs[0]), null);
        List list = new ArrayList();
        for (int i = 1; i < certs.length; i++) {
            list.add(0, getCertFromFile(certs[i]));
        }
        CertificateFactory cf = CertificateFactory.getInstance("X509");
        path = cf.generateCertPath(list);

        Set anchors = Collections.singleton(anchor);
        params = new PKIXParameters(anchors);
        params.setRevocationEnabled(false);
    }

    /*
     * Reads the entire input stream into a byte array.
     */
    private static byte[] getTotalBytes(InputStream is) throws IOException {
        byte[] buffer = new byte[8192];
        ByteArrayOutputStream baos = new ByteArrayOutputStream(2048);
        int n;
        baos.reset();
        while ((n = is.read(buffer, 0, buffer.length)) != -1) {
            baos.write(buffer, 0, n);
        }
        return baos.toByteArray();
    }

    /**
     * Get a DER-encoded X.509 certificate from a file.
     *
     * @param certFilePath path to file containing DER-encoded certificate
     * @return X509Certificate
     * @throws IOException on error
     */
    public static X509Certificate getCertFromFile(String certFilePath)
        throws IOException {
            X509Certificate cert = null;
            try {
                File certFile = new File(System.getProperty("test.src", "."),
                    certFilePath);
                FileInputStream certFileInputStream =
                    new FileInputStream(certFile);
                CertificateFactory cf = CertificateFactory.getInstance("X509");
                cert = (X509Certificate)
                    cf.generateCertificate(certFileInputStream);
            } catch (Exception e) {
                e.printStackTrace();
                throw new IOException("Can't construct X509Certificate: " +
                                      e.getMessage());
            }
            return cert;
    }

    /**
     * Perform a PKIX validation. On success, print the
     * CertPathValidatorResult on System.out. On failure,
     * throw an exception.
     *
     * @param path CertPath to validate
     * @param params PKIXParameters to use in validation
     * @throws Exception on error
     */
    public static void validate(CertPath path, PKIXParameters params)
        throws Exception {
        CertPathValidator validator =
            CertPathValidator.getInstance("PKIX");
        CertPathValidatorResult cpvr = validator.validate(path, params);
    }
}