| /* |
| * Copyright (c) 1998, 2016, 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 4102896 |
| * @summary Make sure that a SecureRandom object can be serialized |
| * @run main/othervm Serialize |
| */ |
| |
| import java.security.*; |
| import java.io.*; |
| |
| public class Serialize { |
| |
| public static void main(String args[]) throws Exception { |
| System.setProperty("java.security.egd", "file:/dev/urandom"); |
| |
| for (String alg: new String[]{ |
| "SHA1PRNG", "DRBG", "Hash_DRBG", "HMAC_DRBG", "CTR_DRBG", |
| "Hash_DRBG,SHA-512,192,pr_and_reseed"}) { |
| |
| System.out.println("Testing " + alg); |
| SecureRandom s1; |
| |
| // A SecureRandom can be s11ned and des11ned at any time. |
| |
| // Brand new. |
| s1 = getInstance(alg); |
| revive(s1).nextInt(); |
| if (alg.contains("DRBG")) { |
| revive(s1).reseed(); |
| } |
| |
| // Used |
| s1 = getInstance(alg); |
| s1.nextInt(); // state set |
| revive(s1).nextInt(); |
| if (alg.contains("DRBG")) { |
| revive(s1).reseed(); |
| } |
| |
| // Automatically reseeded |
| s1 = getInstance(alg); |
| if (alg.contains("DRBG")) { |
| s1.reseed(); |
| } |
| revive(s1).nextInt(); |
| if (alg.contains("DRBG")) { |
| revive(s1).reseed(); |
| } |
| |
| // Manually seeded |
| s1 = getInstance(alg); |
| s1.setSeed(1L); |
| revive(s1).nextInt(); |
| if (alg.contains("DRBG")) { |
| revive(s1).reseed(); |
| } |
| } |
| } |
| |
| private static SecureRandom getInstance(String alg) throws Exception { |
| if (alg.equals("SHA1PRNG") || alg.equals("DRBG")) { |
| return SecureRandom.getInstance(alg); |
| } else { |
| String old = Security.getProperty("securerandom.drbg.config"); |
| try { |
| Security.setProperty("securerandom.drbg.config", alg); |
| return SecureRandom.getInstance("DRBG"); |
| } finally { |
| Security.setProperty("securerandom.drbg.config", old); |
| } |
| } |
| } |
| |
| private static SecureRandom revive(SecureRandom oldOne) throws Exception { |
| ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
| new ObjectOutputStream(bout).writeObject(oldOne); |
| SecureRandom newOne = (SecureRandom) new ObjectInputStream( |
| new ByteArrayInputStream(bout.toByteArray())).readObject(); |
| if (!oldOne.toString().equals(newOne.toString())) { |
| throw new Exception(newOne + " is not " + oldOne); |
| } |
| return newOne; |
| } |
| } |