119 lines
4.8 KiB
Java
119 lines
4.8 KiB
Java
/*
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* Copyright (c) 2012, 2024, 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 7044060 8055351 8181048
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* @summary verify that DSA parameter generation works
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* @run main/timeout=600 TestAlgParameterGenerator
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*/
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import java.security.AlgorithmParameterGenerator;
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import java.security.AlgorithmParameters;
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import java.security.spec.DSAGenParameterSpec;
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import java.security.spec.DSAParameterSpec;
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public class TestAlgParameterGenerator {
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private static void checkParamStrength(AlgorithmParameters param,
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int strength) throws Exception {
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String algo = param.getAlgorithm();
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if (!algo.equalsIgnoreCase("DSA")) {
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throw new RuntimeException("Unexpected type of parameters: " + algo);
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}
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DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class);
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int valueL = spec.getP().bitLength();
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if (strength != valueL) {
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System.out.println("Expected " + strength + " but actual " + valueL);
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throw new RuntimeException("Wrong P strength");
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}
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}
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private static void checkParamStrength(AlgorithmParameters param,
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DSAGenParameterSpec genParam)
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throws Exception {
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String algo = param.getAlgorithm();
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if (!algo.equalsIgnoreCase("DSA")) {
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throw new RuntimeException("Unexpected type of parameters: " + algo);
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}
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DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class);
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int valueL = spec.getP().bitLength();
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int strength = genParam.getPrimePLength();
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if (strength != valueL) {
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System.out.println("P: Expected " + strength + " but actual " + valueL);
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throw new RuntimeException("Wrong P strength");
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}
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int valueN = spec.getQ().bitLength();
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strength = genParam.getSubprimeQLength();
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if (strength != valueN) {
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System.out.println("Q: Expected " + strength + " but actual " + valueN);
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throw new RuntimeException("Wrong Q strength");
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}
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}
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public static void main(String[] args) throws Exception {
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AlgorithmParameterGenerator apg
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= AlgorithmParameterGenerator.getInstance("DSA",
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System.getProperty("test.provider.name", "SUN"));
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long start, stop;
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// make sure no-init still works
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start = System.currentTimeMillis();
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AlgorithmParameters param = apg.generateParameters();
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stop = System.currentTimeMillis();
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System.out.println("Time: " + (stop - start) + " ms.");
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// make sure the old model works
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int[] strengths = {512, 768, 1024};
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for (int sizeP : strengths) {
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System.out.println("Generating " + sizeP + "-bit DSA Parameters");
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start = System.currentTimeMillis();
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apg.init(sizeP);
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param = apg.generateParameters();
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stop = System.currentTimeMillis();
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System.out.println("Time: " + (stop - start) + " ms.");
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checkParamStrength(param, sizeP);
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}
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// now the newer model
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DSAGenParameterSpec[] specSet = {
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new DSAGenParameterSpec(1024, 160),
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new DSAGenParameterSpec(2048, 224),
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new DSAGenParameterSpec(2048, 256)
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// no support for prime size 3072
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// ,new DSAGenParameterSpec(3072, 256)
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};
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for (DSAGenParameterSpec genParam : specSet) {
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System.out.println("Generating (" + genParam.getPrimePLength()
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+ ", " + genParam.getSubprimeQLength() + ") DSA Parameters");
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start = System.currentTimeMillis();
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apg.init(genParam, null);
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param = apg.generateParameters();
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stop = System.currentTimeMillis();
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System.out.println("Time: " + (stop - start) + " ms.");
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checkParamStrength(param, genParam);
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}
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}
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}
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