/* * Copyright (c) 2006, 2015 Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /** * @test * @bug 6449335 * @requires os.family == "windows" * @summary MSCAPI's PRNG is too slow */ import java.security.SecureRandom; public class PrngSlow { public static void main(String[] args) throws Exception { double t = 0.0; SecureRandom sr = null; sr = SecureRandom.getInstance("Windows-PRNG", "SunMSCAPI"); long start = System.nanoTime(); for (int i = 0; i < 10000; i++) { if (i % 100 == 0) System.err.print("."); sr.nextBoolean(); }; t = (System.nanoTime() - start) / 1000000000.0; System.err.println("\nSpend " + t + " seconds"); if (t > 5) throw new RuntimeException("Still too slow"); } }