1 /* 2 * Copyright (c) 1998, 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 /* @test 25 * @bug 4102896 26 * @summary Make sure that a SecureRandom object can be serialized 27 */ 28 29 import java.security.*; 30 import java.io.*; 31 32 public class Serialize { 33 34 public static void main(String args[]) throws Exception { 35 for (String alg: new String[]{ 36 "SHA1PRNG", "DRBG", "Hash_DRBG", "HMAC_DRBG", "CTR_DRBG", 37 "Hash_DRBG,SHA-512,192,pr_and_reseed"}) { 38 39 System.out.println("Testing " + alg); 40 SecureRandom s1; 41 42 // A SecureRandom can be s11ned and des11ned at any time. 43 44 // Brand new. 45 s1 = getInstance(alg); 46 revive(s1).nextInt(); 47 if (alg.contains("DRBG")) { 48 revive(s1).reseed(); 49 } 50 51 // Used 52 s1 = getInstance(alg); 53 s1.nextInt(); // state set 54 revive(s1).nextInt(); 55 if (alg.contains("DRBG")) { 56 revive(s1).reseed(); 57 } 58 59 // Automatically reseeded 60 s1 = getInstance(alg); 61 if (alg.contains("DRBG")) { 62 s1.reseed(); 63 } 64 revive(s1).nextInt(); 65 if (alg.contains("DRBG")) { 66 revive(s1).reseed(); 67 } 68 69 // Manually seeded 70 s1 = getInstance(alg); 71 s1.setSeed(1L); 72 revive(s1).nextInt(); 73 if (alg.contains("DRBG")) { 74 revive(s1).reseed(); 75 } 76 } 77 } 78 79 private static SecureRandom getInstance(String alg) throws Exception { 80 if (alg.equals("SHA1PRNG") || alg.equals("DRBG")) { 81 return SecureRandom.getInstance(alg); 82 } else { 83 String old = Security.getProperty("securerandom.drbg.config"); 84 try { 85 Security.setProperty("securerandom.drbg.config", alg); 86 return SecureRandom.getInstance("DRBG"); 87 } finally { 88 Security.setProperty("securerandom.drbg.config", old); 89 } 90 } 91 } 92 93 private static SecureRandom revive(SecureRandom oldOne) throws Exception { 94 ByteArrayOutputStream bout = new ByteArrayOutputStream(); 95 new ObjectOutputStream(bout).writeObject(oldOne); 96 SecureRandom newOne = (SecureRandom) new ObjectInputStream( 97 new ByteArrayInputStream(bout.toByteArray())).readObject(); 98 if (!oldOne.toString().equals(newOne.toString())) { 99 throw new Exception(newOne + " is not " + oldOne); 100 } 101 return newOne; 102 } 103 }