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.SecureRandomSpi;

    27 import java.util.Map;

    28 

    29 /*

    30  * @test

    31  * @bug 7004967

    32  * @summary SecureRandom should be more explicit about threading

    33  */

    34 public class ThreadSafe {

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

    36         Provider p = new P();

    37         NoSync.test(SecureRandom.getInstance("S1", p), 5, 5);

    38         try {

    39             NoSync.test(SecureRandom.getInstance("S2", p), 5, 5);

    40             throw new Exception("Failed");

    41         } catch (RuntimeException re) {

    42             // Good

    43         }

    44         NoSync.test(SecureRandom.getInstance("S3", p), 5, 5);

    45         try {

    46             NoSync.test(SecureRandom.getInstance("S4", p), 5, 5);

    47             throw new Exception("Failed");

    48         } catch (RuntimeException re) {

    49             // Good

    50         }

    51     }

    52 

    53     public static class P extends Provider {

    54         public P() {

    55 

    56             super("P", 1.0d, "Haha");

    57 

    58             // Good. No attribute.

    59             put("SecureRandom.S1", S.class.getName());

    60 

    61             // Bad. Boasting ThreadSafe but isn't

    62             put("SecureRandom.S2", S.class.getName());

    63             put("SecureRandom.S2 ThreadSafe", "true");

    64 

    65             // Good. No attribute.

    66             putService(new Service(this, "SecureRandom", "S3",

    67                     S.class.getName(), null, null));

    68 

    69             // Bad. Boasting ThreadSafe but isn't

    70             putService(new Service(this, "SecureRandom", "S4",

    71                     S.class.getName(), null, Map.of("ThreadSafe", "true")));

    72         }

    73     }

    74 

    75     // This implementation is not itself thread safe.

    76     public static class S extends SecureRandomSpi {

    77         @java.lang.Override

    78         protected void engineSetSeed(byte[] seed) {

    79             return;

    80         }

    81 

    82         private volatile boolean inCall = false;

    83         @Override

    84         protected void engineNextBytes(byte[] bytes) {

    85             if (inCall) {

    86                 throw new RuntimeException("IN CALL");

    87             }

    88             inCall = true;

    89             try {

    90                 Thread.sleep(100);

    91             } catch (Exception e) {

    92                 // OK

    93             }

    94             inCall = false;

    95         }

    96 

    97         @Override

    98         protected byte[] engineGenerateSeed(int numBytes) {

    99             return new byte[numBytes];

   100         }

   101     }

   102 }