1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 import java.security.Provider;

    25 import java.security.SecureRandom;

    26 import java.security.Security;

    27 import java.util.Date;

    28 import java.util.concurrent.atomic.AtomicBoolean;

    29 

    30 /*

    31  * @test

    32  * @bug 7004967

    33  * @run main/othervm NoSync

    34  * @summary SecureRandom should be more explicit about threading

    35  */

    36 public class NoSync {

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

    38         for (Provider p : Security.getProviders()) {

    39             for (Provider.Service s : p.getServices()) {

    40                 if (s.getType().equals("SecureRandom") &&

    41                         !s.getAlgorithm().contains("Block")) {

    42                     test(SecureRandom.getInstance(s.getAlgorithm(), p));

    43                 }

    44             }

    45         }

    46         Security.setProperty("securerandom.drbg.config", "HMAC_DRBG");

    47         test(SecureRandom.getInstance("DRBG"));

    48         Security.setProperty("securerandom.drbg.config", "CTR_DRBG");

    49         test(SecureRandom.getInstance("DRBG"));

    50     }

    51 

    52     static void test(SecureRandom sr) throws Exception {

    53         test(sr, 20, 3000);

    54         // All out-of-box impl should have the ThreadSafe attribute

    55         String attr = sr.getProvider().getProperty("SecureRandom."

    56                 + sr.getAlgorithm() + " ThreadSafe");

    57         if (!"true".equals(attr)) {

    58             throw new Exception("Not ThreadSafe: " + attr);

    59         }

    60     }

    61 

    62     public static void test(SecureRandom sr, int tnum, int rnum)

    63             throws Exception {

    64 

    65         System.out.println(sr);

    66         System.out.println(sr.getAlgorithm() + " " + sr.getProvider().getName());

    67 

    68         System.out.println(new Date());

    69         boolean reseed = sr.getParameters() != null;

    70         Thread[] threads = new Thread[tnum];

    71         AtomicBoolean failed = new AtomicBoolean(false);

    72         Thread.UncaughtExceptionHandler h = (t, e) -> {

    73             failed.set(true);

    74             e.printStackTrace();

    75         };

    76         for (int i = 0; i < threads.length; i++) {

    77             threads[i] = new Thread() {

    78                 @Override

    79                 public void run() {

    80                     for (int j = 0; j < rnum; j++) {

    81                         sr.nextBytes(new byte[j%100+100]);

    82                         sr.setSeed((long)j);

    83                         if (reseed) {

    84                             sr.reseed();

    85                         }

    86                     }

    87                 }

    88             };

    89             threads[i].setUncaughtExceptionHandler(h);

    90             threads[i].start();

    91         }

    92         for (int i = 0; i < threads.length; i++) {

    93             threads[i].join();

    94         }

    95         System.out.println(new Date());

    96         System.out.println();

    97         if (failed.get()) {

    98             throw new RuntimeException("Failed");

    99         }

   100     }

   101 }