1 /*
   2  * Copyright (c) 2015, 2020, 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 static java.lang.System.out;
  25 import java.security.NoSuchAlgorithmException;
  26 import java.security.SecureRandom;
  27 
  28 /**
  29  * @test
  30  * @bug 8048356
  31  * @summary Assert default provider used on all OS for SecureRandom
  32  */
  33 public class DefaultProvider {
  34 
  35     private static final String OS_NAME = System.getProperty("os.name");
  36     private static final String WINDOWS = "Windows";
  37 
  38     public static void main(String[] args) throws NoSuchAlgorithmException {
  39         out.println("Operating System: " + OS_NAME);
  40 
  41         /* Test default provider used with constructor */
  42         out.println("TEST: Default provider with constructor");
  43         SecureRandom secureRandom = new SecureRandom();
  44         String provider = secureRandom.getProvider().getName();
  45         if (!provider.equals("SUN")) {
  46             throw new RuntimeException("Unexpected provider name: "
  47                     + provider);
  48         }
  49         out.println("Passed, default provider with constructor: " + provider);
  50 
  51         /* Test default provider with getInstance(String algorithm) */
  52         out.println("TEST: SHA1PRNG supported on all platforms by SUN provider");
  53         String algorithm = "SHA1PRNG";
  54         provider = "SUN";
  55 
  56         SecureRandom instance = SecureRandom.getInstance(algorithm);
  57         assertInstance(instance, algorithm, provider);
  58         out.println("Passed.");
  59 
  60         if (!OS_NAME.startsWith(WINDOWS)) {
  61             out.println("TEST: NativePRNG supported on all platforms"
  62                     + "(except Windows), by SUN provider");
  63             algorithm = "NativePRNG";
  64             provider = "SUN";
  65         } else {
  66             out.println(
  67                     "TEST: Windows-PRNG supported on windows by SunMSCAPI provider");
  68             algorithm = "Windows-PRNG";
  69             provider = "SunMSCAPI";
  70         }
  71         instance = SecureRandom.getInstance(algorithm);
  72         assertInstance(instance, algorithm, provider);
  73         out.println("Passed.");
  74     }
  75 
  76     private static void assertInstance(SecureRandom instance,
  77             String expectedAlgorithm,
  78             String expectedProvider) {
  79         if (instance != null) {
  80             if (!expectedAlgorithm.equalsIgnoreCase(instance.getAlgorithm())) {
  81                 throw new RuntimeException("Expected algorithm:"
  82                         + expectedAlgorithm + " actual: " + instance.getAlgorithm());
  83             }
  84 
  85             if (!expectedProvider.equalsIgnoreCase(instance.getProvider().getName())) {
  86                 throw new RuntimeException("Expected provider: "
  87                         + expectedProvider + " actual: "
  88                         + instance.getProvider().getName());
  89             }
  90         } else {
  91             throw new RuntimeException("Secure instance is not created");
  92         }
  93     }
  94 }