Java example source code file (CheckBlacklistedCerts.java)

This example Java source code file (CheckBlacklistedCerts.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

algorithm, bufferedreader, certificatefactory, check, checkblacklistedcerts, exception, failed, file, fileinputstream, inputstreamreader, keystore, security, set, string, util, x509certificate

The CheckBlacklistedCerts.java Java example source code

/*
 * Copyright (c) 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.
 *
 * 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 8011402
 * @summary Move blacklisting certificate logic from hard code to data
 */

import sun.security.util.UntrustedCertificates;

import java.io.*;
import java.security.KeyStore;
import java.security.cert.*;
import java.util.*;

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

        String home = System.getProperty("java.home");
        boolean failed = false;

        // Root CAs should always be trusted
        File file = new File(home, "lib/security/cacerts");
        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
        try (FileInputStream fis = new FileInputStream(file)) {
            ks.load(new FileInputStream(file), null);
        }
        System.out.println("Check for cacerts: " + ks.size());
        for (String alias: Collections.list(ks.aliases())) {
            X509Certificate cert = (X509Certificate)ks.getCertificate(alias);
            if (UntrustedCertificates.isUntrusted(cert)) {
                System.out.print(alias + " is untrusted");
                failed = true;
            }
        }

        // All certs in the pem files
        Set<Certificate> blacklisted = new HashSet<>();

        // Hopefully src comes with test, but it might be missing if doing
        // a -testonly JPRT job.
        File[] blacklists = {
            new File(System.getProperty("test.src"),
                "../../../src/share/lib/security/blacklisted.certs.pem"),
            new File(System.getProperty("test.src"),
                "../../../src/closed/share/lib/security/blacklisted.certs.pem")
        };

        // Is this an OPENJDK build?
        if (!new File(home, "lib/security/local_policy.jar").exists()) {
            blacklists = Arrays.copyOf(blacklists, 1);
        }

        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        for (File blacklist: blacklists) {
            System.out.print("Check for " + blacklist + ": ");
            if (!blacklist.exists()) {
                System.out.println("does not exist");
            } else {
                try (FileInputStream fis = new FileInputStream(blacklist)) {
                    Collection<? extends Certificate> certs
                            = cf.generateCertificates(fis);
                    System.out.println(certs.size());
                    for (Certificate c: certs) {
                        blacklisted.add(c);
                        X509Certificate cert = ((X509Certificate)c);
                        if (!UntrustedCertificates.isUntrusted(cert)) {
                            System.out.println(cert.getSubjectDN() + " is trusted");
                            failed = true;
                        }
                    }
                }
            }
        }

        // Check the blacklisted.certs file itself
        file = new File(home, "lib/security/blacklisted.certs");
        System.out.print("Check for " + file + ": ");
        try (BufferedReader reader = new BufferedReader(
                new InputStreamReader(new FileInputStream(file)))) {
            int acount = 0;
            int ccount = 0;
            while (true) {
                String line = reader.readLine();
                if (line == null) break;
                if (line.startsWith("Algorithm")) {
                    acount++;
                } else if (!line.isEmpty() && !line.startsWith("#")) {
                    ccount++;
                }
            }
            System.out.println(acount + " algs, " + ccount + " certs" );
            if (acount != 1) {
                System.out.println("There are " + acount + " algorithms");
                failed = true;
            }
            if (ccount != blacklisted.size()
                    && !blacklisted.isEmpty()) {
                System.out.println("Wrong blacklisted.certs size: "
                        + ccount + " fingerprints, "
                        + blacklisted.size() + " certs");
                failed = true;
            }
        }

        if (failed) {
            throw new Exception("Failed");
        }
    }
}