| /* |
| * Copyright (c) 2012, 2017, 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 7044060 8055351 8181048 |
| * @summary verify that DSA parameter generation works |
| * @run main/timeout=600 TestAlgParameterGenerator |
| */ |
| |
| import java.security.AlgorithmParameterGenerator; |
| import java.security.AlgorithmParameters; |
| import java.security.spec.DSAGenParameterSpec; |
| import java.security.spec.DSAParameterSpec; |
| |
| public class TestAlgParameterGenerator { |
| |
| private static void checkParamStrength(AlgorithmParameters param, |
| int strength) throws Exception { |
| String algo = param.getAlgorithm(); |
| if (!algo.equalsIgnoreCase("DSA")) { |
| throw new RuntimeException("Unexpected type of parameters: " + algo); |
| } |
| DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class); |
| int valueL = spec.getP().bitLength(); |
| if (strength != valueL) { |
| System.out.println("Expected " + strength + " but actual " + valueL); |
| throw new RuntimeException("Wrong P strength"); |
| } |
| } |
| |
| private static void checkParamStrength(AlgorithmParameters param, |
| DSAGenParameterSpec genParam) |
| throws Exception { |
| String algo = param.getAlgorithm(); |
| if (!algo.equalsIgnoreCase("DSA")) { |
| throw new RuntimeException("Unexpected type of parameters: " + algo); |
| } |
| DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class); |
| int valueL = spec.getP().bitLength(); |
| int strength = genParam.getPrimePLength(); |
| if (strength != valueL) { |
| System.out.println("P: Expected " + strength + " but actual " + valueL); |
| throw new RuntimeException("Wrong P strength"); |
| } |
| int valueN = spec.getQ().bitLength(); |
| strength = genParam.getSubprimeQLength(); |
| if (strength != valueN) { |
| System.out.println("Q: Expected " + strength + " but actual " + valueN); |
| throw new RuntimeException("Wrong Q strength"); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| AlgorithmParameterGenerator apg |
| = AlgorithmParameterGenerator.getInstance("DSA", "SUN"); |
| long start, stop; |
| |
| // make sure no-init still works |
| start = System.currentTimeMillis(); |
| AlgorithmParameters param = apg.generateParameters(); |
| stop = System.currentTimeMillis(); |
| System.out.println("Time: " + (stop - start) + " ms."); |
| |
| // make sure the old model works |
| int[] strengths = {512, 768, 1024}; |
| for (int sizeP : strengths) { |
| System.out.println("Generating " + sizeP + "-bit DSA Parameters"); |
| start = System.currentTimeMillis(); |
| apg.init(sizeP); |
| param = apg.generateParameters(); |
| stop = System.currentTimeMillis(); |
| System.out.println("Time: " + (stop - start) + " ms."); |
| checkParamStrength(param, sizeP); |
| } |
| |
| // now the newer model |
| DSAGenParameterSpec[] specSet = { |
| new DSAGenParameterSpec(1024, 160), |
| new DSAGenParameterSpec(2048, 224), |
| new DSAGenParameterSpec(2048, 256) |
| // no support for prime size 3072 |
| // ,new DSAGenParameterSpec(3072, 256) |
| }; |
| |
| for (DSAGenParameterSpec genParam : specSet) { |
| System.out.println("Generating (" + genParam.getPrimePLength() |
| + ", " + genParam.getSubprimeQLength() + ") DSA Parameters"); |
| start = System.currentTimeMillis(); |
| apg.init(genParam, null); |
| param = apg.generateParameters(); |
| stop = System.currentTimeMillis(); |
| System.out.println("Time: " + (stop - start) + " ms."); |
| checkParamStrength(param, genParam); |
| } |
| } |
| } |