1 /* 2 * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 7044060 27 * @summary verify that DSA parameter generation works 28 * @run main/othervm/timeout=300 TestAlgParameterGenerator 29 */ 30 import java.security.*; 31 import java.security.spec.*; 32 import java.security.interfaces.*; 33 34 public class TestAlgParameterGenerator { 35 36 private static void checkParamStrength(AlgorithmParameters param, 37 int strength) throws Exception { 38 String algo = param.getAlgorithm(); 39 if (!algo.equalsIgnoreCase("DSA")) { 40 throw new Exception("Unexpected type of parameters: " + algo); 41 } 42 DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class); 43 int valueL = spec.getP().bitLength(); 44 if (strength != valueL) { 45 System.out.println( 46 "Expected " + strength + " but actual " + valueL); 47 throw new Exception("Wrong P strength"); 48 } 49 } 50 51 private static void checkParamStrength(AlgorithmParameters param, 52 DSAGenParameterSpec genParam) throws Exception { 53 54 String algo = param.getAlgorithm(); 55 if (!algo.equalsIgnoreCase("DSA")) { 56 throw new Exception("Unexpected type of parameters: " + algo); 57 } 58 DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class); 59 int valueL = spec.getP().bitLength(); 60 int strength = genParam.getPrimePLength(); 61 if (strength != valueL) { 62 System.out.println( 63 "P: Expected " + strength + " but actual " + valueL); 64 throw new Exception("Wrong P strength"); 65 } 66 int valueN = spec.getQ().bitLength(); 67 strength = genParam.getSubprimeQLength(); 68 if (strength != valueN) { 69 System.out.println( 70 "Q: Expected " + strength + " but actual " + valueN); 71 throw new Exception("Wrong Q strength"); 72 } 73 } 74 75 public static void main(String[] args) throws Exception { 76 AlgorithmParameterGenerator apg = 77 AlgorithmParameterGenerator.getInstance("DSA", "SUN"); 78 79 long start, stop; 80 // make sure no-init still works 81 start = System.currentTimeMillis(); 82 AlgorithmParameters param = apg.generateParameters(); 83 stop = System.currentTimeMillis(); 84 System.out.println("Time: " + (stop - start) + " ms."); 85 checkParamStrength(param, 1024); 86 87 // make sure the old model works 88 int[] strengths = { 512, 768, 1024 }; 89 for (int i = 0; i < strengths.length; i++) { 90 int sizeP = strengths[i]; 91 System.out.println("Generating " + sizeP + "-bit DSA Parameters"); 92 start = System.currentTimeMillis(); 93 apg.init(sizeP); 94 param = apg.generateParameters(); 95 stop = System.currentTimeMillis(); 96 System.out.println("Time: " + (stop - start) + " ms."); 97 checkParamStrength(param, sizeP); 98 } 99 100 // now the newer model 101 DSAGenParameterSpec spec1 = new DSAGenParameterSpec(1024, 160); 102 DSAGenParameterSpec spec2 = new DSAGenParameterSpec(2048, 224); 103 DSAGenParameterSpec spec3 = new DSAGenParameterSpec(2048, 256); 104 DSAGenParameterSpec[] specSet = { 105 spec1, spec2, spec3 106 }; 107 for (int i = 0; i < specSet.length; i++) { 108 DSAGenParameterSpec genParam = specSet[i]; 109 System.out.println("Generating (" + genParam.getPrimePLength() + 110 ", " + genParam.getSubprimeQLength() + 111 ") DSA Parameters"); 112 start = System.currentTimeMillis(); 113 apg.init(genParam, null); 114 param = apg.generateParameters(); 115 stop = System.currentTimeMillis(); 116 System.out.println("Time: " + (stop - start) + " ms."); 117 checkParamStrength(param, genParam); 118 } 119 } 120 }