1 /*

     2  * Copyright (c) 2018, 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 /**

    25  * @test

    26  * @bug     8211049

    27  * @summary make sure the supplied SecureRandom object is used

    28  */

    29 

    30 import java.security.*;

    31 import java.security.interfaces.*;

    32 

    33 public class TestKeyPairGeneratorInit {

    34 

    35     private static class MySecureRandom extends SecureRandom {

    36         boolean isUsed = false;

    37         public MySecureRandom() {

    38             super();

    39         }

    40 

    41         public void nextBytes(byte[] bytes) {

    42             isUsed = true;

    43             super.nextBytes(bytes);

    44         }

    45     }

    46 

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

    48         KeyPairGenerator kpg =

    49             KeyPairGenerator.getInstance("RSA", "SunRsaSign");

    50         MySecureRandom rnd = new MySecureRandom();

    51         kpg.initialize(2048, rnd);

    52         System.out.println("Generate keypair then check");

    53         KeyPair kp = kpg.generateKeyPair();

    54         if (!rnd.isUsed) {

    55             throw new RuntimeException("ERROR: Supplied random not used");

    56         } else {

    57             System.out.println("=> Test passed");

    58         }

    59     }

    60 }