test/java/math/BigInteger/ModPow65537.java

rev 11823 : 8078672: Print and allow setting by Java property seeds used to initialize Random instances in java.lang numerics tests
Summary: Add ability to initial the random number generator from the system property "seed" and print to STDOUT the seed value actually used.
Reviewed-by: XXX

*** 21,41 ****
   * questions.
   */
  
  /*
   * @test
!  * @library ..
!  * @bug 4891312 8074460
   * @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)
   * @author Andreas Sterbenz
   * @key randomness
   */
  
  import java.math.BigInteger;
  
  import java.security.*;
  import java.security.spec.*;
  
  public class ModPow65537 {
  
      public static void main(String[] args) throws Exception {
          // SunRsaSign uses BigInteger internally
--- 21,44 ----
   * questions.
   */
  
  /*
   * @test
!  * @library /lib/testlibrary/
!  * @build jdk.testlibrary.*
!  * @run main ModPow65537
!  * @bug 4891312 8074460 8078672
   * @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)
   * @author Andreas Sterbenz
   * @key randomness
   */
  
  import java.math.BigInteger;
  
  import java.security.*;
  import java.security.spec.*;
+ import java.util.Random;
  
  public class ModPow65537 {
  
      public static void main(String[] args) throws Exception {
          // SunRsaSign uses BigInteger internally
*** 77,89 ****
      }
  
      private static void testSigning(KeyPair kp) throws Exception {
          System.out.println(kp.getPublic());
          byte[] data = new byte[1024];
!         RandomSeed rndSeed = new RandomSeed(false);
!         System.out.println("Random number generator seed = " + rndSeed.getSeed());
!         rndSeed.getRandom().nextBytes(data);
  
          Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");
          sig.initSign(kp.getPrivate());
          sig.update(data);
          byte[] sigBytes = sig.sign();
--- 80,91 ----
      }
  
      private static void testSigning(KeyPair kp) throws Exception {
          System.out.println(kp.getPublic());
          byte[] data = new byte[1024];
!         Random random = RandomFactory.getRandom();
!         random.nextBytes(data);
  
          Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");
          sig.initSign(kp.getPrivate());
          sig.update(data);
          byte[] sigBytes = sig.sign();