56 lines
1.9 KiB
Java
56 lines
1.9 KiB
Java
/*
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* Copyright (c) 2016, 2021, 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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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.security.SecureRandom;
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/**
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* @test
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* @bug 8154523 8247895
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* @summary SHA1PRNG output should change after setSeed
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*/
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public class SHA1PRNGReseed {
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public static void main(String[] args) throws Exception {
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SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
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sr.setSeed(1);
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sr.nextInt();
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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new ObjectOutputStream(bout).writeObject(sr);
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SecureRandom sr2 = (SecureRandom) new ObjectInputStream(
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new ByteArrayInputStream(bout.toByteArray())).readObject();
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int i1 = sr.nextInt();
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sr2.setSeed(2);
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int i2 = sr2.nextInt();
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if (i1 == i2) {
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throw new Exception("output should not be the same");
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}
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}
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}
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