67 lines
2.2 KiB
Java
67 lines
2.2 KiB
Java
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/*
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* Copyright 2002-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/**
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* @test
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* @bug 4716321
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* @summary Ensure the random source supplied in
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* Signature.initSign(PrivateKey, SecureRandom) is used.
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*/
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import java.security.*;
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public class TestInitSignWithMyOwnRandom {
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public static void main(String[] argv) throws Exception {
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// any signature implementation will do as long as
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// it needs a random source
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Provider p = Security.getProvider("SUN");
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KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA", p);
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kpg.initialize(512);
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KeyPair kp = kpg.generateKeyPair();
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TestRandomSource rand = new TestRandomSource();
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Signature sig = Signature.getInstance("DSA", p);
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sig.initSign(kp.getPrivate(), rand);
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sig.update(new byte[20]);
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sig.sign();
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if (rand.isUsed()) {
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System.out.println("Custom random source is used.");
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} else {
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throw new Exception("Custom random source is not used");
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}
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}
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}
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class TestRandomSource extends SecureRandom {
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int count = 0;
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public int nextInt() {
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count++;
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return 0;
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}
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public boolean isUsed() {
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return (count != 0);
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}
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}
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