/*
* Copyright (c) 2002, 2003, 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.
*
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*/
/**
* @test
* @bug 4716321
* @summary Ensure the random source supplied in
* Signature.initSign(PrivateKey, SecureRandom) is used.
*/
import java.security.*;
public class TestInitSignWithMyOwnRandom {
public static void main(String[] argv) throws Exception {
// any signature implementation will do as long as
// it needs a random source
Provider p = Security.getProvider("SUN");
KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA", p);
kpg.initialize(512);
KeyPair kp = kpg.generateKeyPair();
TestRandomSource rand = new TestRandomSource();
Signature sig = Signature.getInstance("DSA", p);
sig.initSign(kp.getPrivate(), rand);
sig.update(new byte[20]);
sig.sign();
if (rand.isUsed()) {
System.out.println("Custom random source is used.");
} else {
throw new Exception("Custom random source is not used");
}
}
}
class TestRandomSource extends SecureRandom {
int count = 0;
public int nextInt() {
count++;
return 0;
}
public boolean isUsed() {
return (count != 0);
}
}