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/*
* Copyright (c) 2016, 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.
*/
import java.security.Provider;
import java.security.SecureRandom;
import java.security.SecureRandomSpi;
import java.util.Map;
/*
* @test
* @bug 7004967
* @summary SecureRandom should be more explicit about threading
*/
public class ThreadSafe {
public static void main(String[] args) throws Exception {
Provider p = new P();
NoSync.test(SecureRandom.getInstance("S1", p), 5, 5);
try {
NoSync.test(SecureRandom.getInstance("S2", p), 5, 5);
throw new Exception("Failed");
} catch (RuntimeException re) {
// Good
}
NoSync.test(SecureRandom.getInstance("S3", p), 5, 5);
try {
NoSync.test(SecureRandom.getInstance("S4", p), 5, 5);
throw new Exception("Failed");
} catch (RuntimeException re) {
// Good
}
}
public static class P extends Provider {
public P() {
super("P", 1.0d, "Haha");
// Good. No attribute.
put("SecureRandom.S1", S.class.getName());
// Bad. Boasting ThreadSafe but isn't
put("SecureRandom.S2", S.class.getName());
put("SecureRandom.S2 ThreadSafe", "true");
// Good. No attribute.
putService(new Service(this, "SecureRandom", "S3",
S.class.getName(), null, null));
// Bad. Boasting ThreadSafe but isn't
putService(new Service(this, "SecureRandom", "S4",
S.class.getName(), null, Map.of("ThreadSafe", "true")));
}
}
// This implementation is not itself thread safe.
public static class S extends SecureRandomSpi {
@java.lang.Override
protected void engineSetSeed(byte[] seed) {
return;
}
private volatile boolean inCall = false;
@Override
protected void engineNextBytes(byte[] bytes) {
if (inCall) {
throw new RuntimeException("IN CALL");
}
inCall = true;
try {
Thread.sleep(100);
} catch (Exception e) {
// OK
}
inCall = false;
}
@Override
protected byte[] engineGenerateSeed(int numBytes) {
return new byte[numBytes];
}
}
}
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