/*
* Copyright (c) 2010, 2011, 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 6998583
* @summary NativeSeedGenerator is making 8192 byte read requests from
* entropy pool on each init.
* @run main SeedGeneratorChoice
* @run main/othervm -Djava.security.egd=file:/dev/random SeedGeneratorChoice
* @run main/othervm -Djava.security.egd=file:filename SeedGeneratorChoice
*/
/*
* Side testcase introduced to ensure changes for 6998583 will always
* succeed in falling back to ThreadedSeedGenerator if issues are found
* with the native OS generator request. We should never see an exception
* causing exit.
* We should always fall back to the ThreadedSeedGenerator if exceptions
* are encountered with user defined source of entropy.
*/
import java.security.SecureRandom;
public class SeedGeneratorChoice {
public static void main(String... arguments) throws Exception {
byte[] bytes;
SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");
bytes = prng.generateSeed(1);
}
}