Name: tb29552 Date: 05/13/98


/**
When running on top of the new JDK 1.1.6 or
JRE 1.1.6 Java interpreter in a Win32 environment,
JSAFE_SecureRandom hangs (see examples below). We
believe that this is directly related to the JIT
compiler, which was introduced in 1.1.6,
because the problem does not arise when we run
the tests with the interpreter's -nojit option and
it did not occur with the 1.1.5 release.

-----------------------------------------
CONFIGURATION: JSafe 1.1, WinTel / NT 4.0,
JDK 1.1.6 or JRE 1.1.6
-----------------------------------------
EXAMPLES:

Compile the following test class and run it
against either the jdk interpreter, java,
or the runtime interpreter, jre. Then run it
again using the "-nojit" option,
and it will work.
*/

import COM.rsa.jsafe.*;
import java.io.*;

public class RSATest1 extends Object {
  public static void main(String[] args) {
    try {
      System.out.println("Getting instance ...");
      JSAFE_SecureRandom random =
      JSAFE_SecureRandom.getInstance("MD5Random", "Java");
      System.out.println("Auto seeding ...");
      random.autoseed();
      System.out.println("Never gets here.");
      random.generateRandomBytes(20);
    }
    catch (JSAFE_UnimplementedException e) {
      e.printStackTrace();
    };
  }
}
/*
To ensure that the problem does not lie with
the autoseed, which relies on java's own
mechanisms, we also ran the test
with explicit seeding but found that
it then hangs on the
generateRandomBytes method.
*/

public class RSATest2 {

  public static void main(String[] args) {
    try {
      System.out.println("JSAFE_SecureRandom: Getting MD5 instance ...");
      COM.rsa.jsafe.JSAFE_SecureRandom md5random =
      COM.rsa.jsafe.JSAFE_SecureRandom.getInstance("MD5Random", "Java");
      System.out.println("Explicit seeding ...");
      md5random.setSeed((new String("ljkdfj823rlkjasdf8jasd ad")).getBytes());
      System.out.println("Generating random bytes ...");
      md5random.generateRandomBytes(20);
      System.out.println("MD5 finished.");

    } catch (COM.rsa.jsafe.JSAFE_UnimplementedException e) {
      e.printStackTrace();
    };

  }

}
(Review ID: 30311)
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