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/*
* Copyright (c) 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 8298420
* @library /test/lib
* @summary Testing PEM API is thread safe
* @enablePreview
* @modules java.base/sun.security.util
*/
import java.security.*;
import java.util.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import jdk.test.lib.security.SecurityUtils;
public class PEMMultiThreadTest {
static final int THREAD_COUNT = 5;
static final int KEYS_COUNT = 50;
public static void main(String[] args) throws Exception {
PEMEncoder encoder = PEMEncoder.of();
try (ExecutorService ex = Executors.newFixedThreadPool(THREAD_COUNT)) {
Map<Integer, PublicKey> keys = new HashMap<>();
Map<Integer, String> encoded = Collections.synchronizedMap(new HashMap<>());
Map<Integer, String> decoded = Collections.synchronizedMap(new HashMap<>());
final CountDownLatch encodingComplete = new CountDownLatch(KEYS_COUNT);
final CountDownLatch decodingComplete = new CountDownLatch(KEYS_COUNT);
// Generate keys and encode them in parallel
for (int i = 0; i < KEYS_COUNT; i++) {
final int finalI = i;
KeyPair kp = getKeyPair();
keys.put(finalI, kp.getPublic());
ex.submit(() -> {
encoded.put(finalI, encoder.encodeToString(kp.getPublic()));
encodingComplete.countDown();
});
}
encodingComplete.await();
// Decode keys in parallel
PEMDecoder decoder = PEMDecoder.of();
for (Map.Entry<Integer, String> entry : encoded.entrySet()) {
ex.submit(() -> {
decoded.put(entry.getKey(), decoder.decode(entry.getValue(), PublicKey.class)
.toString());
decodingComplete.countDown();
});
}
decodingComplete.await();
// verify all keys were properly encoded and decoded comparing with the original key map
for (Map.Entry<Integer, PublicKey> kp : keys.entrySet()) {
if (!decoded.get(kp.getKey()).equals(kp.getValue().toString())) {
throw new RuntimeException("a key was not properly encoded and decoded: " + decoded);
}
}
}
System.out.println("PASS: testThreadSafety");
}
private static KeyPair getKeyPair() throws NoSuchAlgorithmException {
String alg = "EC";
KeyPairGenerator kpg = KeyPairGenerator.getInstance(alg);
kpg.initialize(SecurityUtils.getTestKeySize(alg));
return kpg.generateKeyPair();
}
}
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