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/*
* Copyright (c) 1999, 2025, 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 4162583 7054918 8130181 8028127
* @library /test/lib
* @summary Make sure Provider api implementations are synchronized properly
*/
import java.security.*;
import jdk.test.lib.Asserts;
import jdk.test.lib.security.ProvidersSnapshot;
public class SynchronizedAccess {
public static void main(String[] args) throws Exception {
ProvidersSnapshot snapshot = ProvidersSnapshot.create();
try {
main0(args);
} finally {
snapshot.restore();
}
}
public static void main0(String[] args) throws Exception {
var providersCountBefore = Security.getProviders().length;
AccessorThread[] acc = new AccessorThread[200];
for (int i = 0; i < acc.length; i++) {
acc[i] = new AccessorThread("thread" + i);
}
for (int i = 0; i < acc.length; i++) {
acc[i].start();
}
for (int i = 0; i < acc.length; i++) {
acc[i].join();
}
var providersCountAfter = Security.getProviders().length;
Asserts.assertEquals(providersCountBefore, providersCountAfter);
}
static class AccessorThread extends Thread {
public AccessorThread(String str) {
super(str);
}
public void run() {
Provider[] provs = new Provider[10];
for (int i = 0; i < provs.length; i++) {
provs[i] = new MyProvider("name" + i, "1", "test");
}
int rounds = 20;
while (rounds-- > 0) {
for (int i = 0; i < provs.length; i++) {
// Might install (>=0) or not (-1) if already installed
Security.addProvider(provs[i]);
Thread.yield();
}
try {
Signature.getInstance("sigalg");
Thread.yield();
} catch (NoSuchAlgorithmException nsae) {
// All providers may have been deregistered. Ok.
}
for (int i = 0; i < provs.length; i++) {
// Might or might not remove (silent return)
Security.removeProvider("name" + i);
Thread.yield();
}
} // while
}
public static final class MyProvider extends Provider {
public MyProvider(String name, String version, String info) {
super(name, version, info);
put("Signature.sigalg", SigImpl.class.getName());
}
}
public static final class SigImpl extends Signature {
public SigImpl() {
super(null);
}
@Override
protected void engineInitVerify(PublicKey publicKey) {
}
@Override
protected void engineInitSign(PrivateKey privateKey) {
}
@Override
protected void engineUpdate(byte b) {
}
@Override
protected void engineUpdate(byte[] b, int off, int len) {
}
@Override
protected byte[] engineSign() {
return new byte[0];
}
@Override
protected boolean engineVerify(byte[] sigBytes) {
return false;
}
@Override
protected void engineSetParameter(String param, Object value)
throws InvalidParameterException {
}
@Override
protected Object engineGetParameter(String param)
throws InvalidParameterException {
return null;
}
}
}
}
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