russell@unturf.com
0a580b313d
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.
120 lines
4.5 KiB
Java
120 lines
4.5 KiB
Java
/*
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* Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8200792 8355379
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* @summary Tests PKCS12Attribute#hashCode correctness, stability, and caching after Stable annotation fix
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*/
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import java.security.PKCS12Attribute;
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import java.util.HashSet;
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import java.util.Set;
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public class HashCode {
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public static void main(String[] args) throws Exception {
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int h1 = new PKCS12Attribute("1.2.3.4", "AA").hashCode();
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int h2 = new PKCS12Attribute("2.3.4.5", "BB,CC").hashCode();
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if (h1 == -1 || h2 == -1 || h1 == h2) {
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throw new Exception("Unexpected hashCodes: " + h1 + " and " + h2);
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}
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PKCS12Attribute attr1 = new PKCS12Attribute("1.2.3.4", "AA");
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// Equality and hash code consistency
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testHashCode(attr1);
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// Inequality and hash code difference
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testInequality(new PKCS12Attribute("1.2.3.4", "AA"),
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new PKCS12Attribute("1.2.3.4", "BB"));
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testInequality(new PKCS12Attribute("1.2.3.4", "AA"),
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new PKCS12Attribute("2.3.4.5", "AA"));
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// Repeated hashCode consistency
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testRepeatHashCode(attr1);
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// Hash code uniqueness stress test
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testHashCodeUniqueness();
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}
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private static void testHashCode(PKCS12Attribute attr) throws Exception {
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int originalHash = attr.hashCode();
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PKCS12Attribute reconstructed = new PKCS12Attribute(attr.getName(), attr.getValue());
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if (!attr.equals(reconstructed)) {
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throw new Exception("Equality failed for: name=" + attr.getName() +
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", value=" + attr.getValue());
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}
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int newHash = reconstructed.hashCode();
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if (originalHash != newHash) {
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throw new Exception("Hash code mismatch for: name=" + attr.getName() +
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", original=" + originalHash + ", new=" + newHash);
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}
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System.out.println("Pass: name=" + attr.getName() + ", value=" + attr.getValue() +
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", hashCode=" + originalHash);
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}
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private static void testInequality(PKCS12Attribute a1, PKCS12Attribute a2) throws Exception {
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if (a1.equals(a2)) {
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throw new Exception("Unexpected equality: name=" + a1.getName() +
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", values=" + a1.getValue() + " vs " + a2.getValue());
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}
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if (a1.hashCode() == a2.hashCode()) {
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System.out.println("Warning: Different attributes share hashCode: " + a1.hashCode());
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} else {
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System.out.println("Pass: name=" + a1.getName() +
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", values differ and hashCodes differ");
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}
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}
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private static void testRepeatHashCode(PKCS12Attribute attr) throws Exception {
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int h1 = attr.hashCode();
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int h2 = attr.hashCode();
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if (h1 != h2) {
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throw new Exception("Inconsistent hashCode for: name=" + attr.getName() +
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", value=" + attr.getValue());
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}
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System.out.println("Pass: repeat hashCode consistency for name=" + attr.getName());
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}
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private static void testHashCodeUniqueness() {
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Set<Integer> seen = new HashSet<>();
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int collisions = 0;
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for (int i = 0; i < 1000; i++) {
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PKCS12Attribute attr = new PKCS12Attribute("1.2.3." + i, "V" + i);
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if (!seen.add(attr.hashCode())) {
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System.out.println("Hash collision: name=" + attr.getName() +
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", value=" + attr.getValue());
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collisions++;
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}
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}
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System.out.println("Hash uniqueness test complete. Collisions: " + collisions);
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}
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}
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