62 lines
2.3 KiB
Java
62 lines
2.3 KiB
Java
/*
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* Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6998583 8141039
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* @summary NativeSeedGenerator is making 8192 byte read requests from
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* entropy pool on each init.
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* @run main/othervm -Djava.security.egd=file:/dev/urandom SeedGeneratorChoice
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* @run main/othervm -Djava.security.egd=file:filename SeedGeneratorChoice
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*/
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/*
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* Side testcase introduced to ensure changes for 6998583 will always
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* succeed in falling back to ThreadedSeedGenerator if issues are found
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* with the native OS generator request. We should never see an exception
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* causing exit.
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* We should always fall back to the ThreadedSeedGenerator if exceptions
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* are encountered with user defined source of entropy.
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*/
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import java.security.SecureRandom;
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import java.security.Security;
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public class SeedGeneratorChoice {
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public static void main(String... arguments) throws Exception {
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for (String mech : new String[]{"SHA1PRNG", "Hash_DRBG", "HMAC_DRBG",
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"CTR_DRBG"}) {
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SecureRandom prng = null;
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if (!mech.contains("_DRBG")) {
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prng = SecureRandom.getInstance(mech);
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} else {
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Security.setProperty("securerandom.drbg.config", mech);
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prng = SecureRandom.getInstance("DRBG");
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}
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prng.generateSeed(1);
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}
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}
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}
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