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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/security/PKCS12Attribute/HashCode.java Normal file
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/*
* Copyright (c) 2018, 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 8200792 8355379
* @summary Tests PKCS12Attribute#hashCode correctness, stability, and caching after Stable annotation fix
*/
import java.security.PKCS12Attribute;
import java.util.HashSet;
import java.util.Set;
public class HashCode {
public static void main(String[] args) throws Exception {
int h1 = new PKCS12Attribute("1.2.3.4", "AA").hashCode();
int h2 = new PKCS12Attribute("2.3.4.5", "BB,CC").hashCode();
if (h1 == -1 || h2 == -1 || h1 == h2) {
throw new Exception("Unexpected hashCodes: " + h1 + " and " + h2);
}
PKCS12Attribute attr1 = new PKCS12Attribute("1.2.3.4", "AA");
// Equality and hash code consistency
testHashCode(attr1);
// Inequality and hash code difference
testInequality(new PKCS12Attribute("1.2.3.4", "AA"),
new PKCS12Attribute("1.2.3.4", "BB"));
testInequality(new PKCS12Attribute("1.2.3.4", "AA"),
new PKCS12Attribute("2.3.4.5", "AA"));
// Repeated hashCode consistency
testRepeatHashCode(attr1);
// Hash code uniqueness stress test
testHashCodeUniqueness();
}
private static void testHashCode(PKCS12Attribute attr) throws Exception {
int originalHash = attr.hashCode();
PKCS12Attribute reconstructed = new PKCS12Attribute(attr.getName(), attr.getValue());
if (!attr.equals(reconstructed)) {
throw new Exception("Equality failed for: name=" + attr.getName() +
", value=" + attr.getValue());
}
int newHash = reconstructed.hashCode();
if (originalHash != newHash) {
throw new Exception("Hash code mismatch for: name=" + attr.getName() +
", original=" + originalHash + ", new=" + newHash);
}
System.out.println("Pass: name=" + attr.getName() + ", value=" + attr.getValue() +
", hashCode=" + originalHash);
}
private static void testInequality(PKCS12Attribute a1, PKCS12Attribute a2) throws Exception {
if (a1.equals(a2)) {
throw new Exception("Unexpected equality: name=" + a1.getName() +
", values=" + a1.getValue() + " vs " + a2.getValue());
}
if (a1.hashCode() == a2.hashCode()) {
System.out.println("Warning: Different attributes share hashCode: " + a1.hashCode());
} else {
System.out.println("Pass: name=" + a1.getName() +
", values differ and hashCodes differ");
}
}
private static void testRepeatHashCode(PKCS12Attribute attr) throws Exception {
int h1 = attr.hashCode();
int h2 = attr.hashCode();
if (h1 != h2) {
throw new Exception("Inconsistent hashCode for: name=" + attr.getName() +
", value=" + attr.getValue());
}
System.out.println("Pass: repeat hashCode consistency for name=" + attr.getName());
}
private static void testHashCodeUniqueness() {
Set<Integer> seen = new HashSet<>();
int collisions = 0;
for (int i = 0; i < 1000; i++) {
PKCS12Attribute attr = new PKCS12Attribute("1.2.3." + i, "V" + i);
if (!seen.add(attr.hashCode())) {
System.out.println("Hash collision: name=" + attr.getName() +
", value=" + attr.getValue());
collisions++;
}
}
System.out.println("Hash uniqueness test complete. Collisions: " + collisions);
}
}