1 /* 2 * Copyright (c) 2017, 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 8181048 27 * @summary verify that when the returned DSA KeyPairGenerator is 28 * an instance of java.security.interfaces.DSAKeyPairGenerator, 29 * the behavior is compliant with the javadoc spec. 30 * @run main/othervm -Djdk.security.legacyDSAKeyPairGenerator=tRUe TestLegacyDSAKeyPairGenerator 31 */ 32 33 import java.security.*; 34 import java.security.interfaces.*; 35 36 public class TestLegacyDSAKeyPairGenerator { 37 38 private static void checkKeyLength(KeyPair kp, int len) throws Exception { 39 DSAPublicKey key = (DSAPublicKey)kp.getPublic(); 40 int n = key.getParams().getP().bitLength(); 41 System.out.println("Key length: " + n); 42 if (len != n) { 43 throw new Exception("Wrong key length"); 44 } 45 } 46 47 public static void main(String[] args) throws Exception { 48 KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA", "SUN"); 49 // check the returned object implements the legacy interface 50 if (!(kpg instanceof DSAKeyPairGenerator)) { 51 throw new Exception("Should be an instance of DSAKeyPairGenerator"); 52 } 53 System.out.println("Returned an instance of DSAKeyPairGenerator"); 54 // check the default key size is 1024 when initiaize(..) is not called 55 KeyPair kp1 = kpg.generateKeyPair(); 56 checkKeyLength(kp1, 1024); 57 KeyPair kp2 = kpg.generateKeyPair(); 58 checkKeyLength(kp2, 1024); 59 System.out.println("Used 1024 default key size"); 60 61 // check kp1 and kp2 uses the same DSA parameters p, q, g 62 DSAParams param1 = ((DSAPublicKey)kp1.getPublic()).getParams(); 63 DSAParams param2 = ((DSAPublicKey)kp2.getPublic()).getParams(); 64 if ((param1.getP().compareTo(param2.getP()) != 0) || 65 (param1.getQ().compareTo(param2.getQ()) != 0) || 66 (param1.getG().compareTo(param2.getG()) != 0)) { 67 throw new RuntimeException("Key params mismatch"); 68 } 69 System.out.println("Used same default params"); 70 71 // check that the documented exception is thrown if no cached parameters 72 int sizeNotInCache = (1024 - 64); 73 try { 74 ((DSAKeyPairGenerator)kpg).initialize(sizeNotInCache, false, null); 75 throw new RuntimeException("Expected IPE not thrown"); 76 } catch (InvalidParameterException ipe) { 77 System.out.println("Throwed expected IPE"); 78 } 79 ((DSAKeyPairGenerator)kpg).initialize(sizeNotInCache, true, null); 80 KeyPair kp = kpg.generateKeyPair(); 81 checkKeyLength(kp, sizeNotInCache); 82 System.out.println("Generated requested key size"); 83 } 84 }