author | weijun |
Fri, 06 May 2016 11:38:44 +0800 | |
changeset 37796 | 256c45c4af5d |
parent 5506 | 202f599c92aa |
child 38437 | 0401899aa994 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* @test |
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* @bug 4102896 |
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* @summary Make sure that a SecureRandom object can be serialized |
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*/ |
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import java.security.*; |
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import java.io.*; |
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public class Serialize { |
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public static void main(String args[]) throws Exception { |
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for (String alg: new String[]{ |
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"SHA1PRNG", "DRBG", "Hash_DRBG", "HMAC_DRBG", "CTR_DRBG", |
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"Hash_DRBG,SHA-512,192,pr_and_reseed"}) { |
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System.out.println("Testing " + alg); |
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SecureRandom s1; |
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// A SecureRandom can be s11ned and des11ned at any time. |
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// Brand new. |
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s1 = getInstance(alg); |
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revive(s1).nextInt(); |
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if (alg.contains("DRBG")) { |
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revive(s1).reseed(); |
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} |
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// Used |
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s1 = getInstance(alg); |
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s1.nextInt(); // state set |
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revive(s1).nextInt(); |
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if (alg.contains("DRBG")) { |
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revive(s1).reseed(); |
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} |
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// Automatically reseeded |
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s1 = getInstance(alg); |
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if (alg.contains("DRBG")) { |
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s1.reseed(); |
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} |
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revive(s1).nextInt(); |
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if (alg.contains("DRBG")) { |
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revive(s1).reseed(); |
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} |
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// Manually seeded |
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s1 = getInstance(alg); |
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s1.setSeed(1L); |
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revive(s1).nextInt(); |
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if (alg.contains("DRBG")) { |
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revive(s1).reseed(); |
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} |
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} |
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} |
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private static SecureRandom getInstance(String alg) throws Exception { |
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if (alg.equals("SHA1PRNG") || alg.equals("DRBG")) { |
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return SecureRandom.getInstance(alg); |
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} else { |
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String old = Security.getProperty("securerandom.drbg.config"); |
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try { |
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Security.setProperty("securerandom.drbg.config", alg); |
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return SecureRandom.getInstance("DRBG"); |
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} finally { |
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Security.setProperty("securerandom.drbg.config", old); |
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} |
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} |
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} |
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private static SecureRandom revive(SecureRandom oldOne) throws Exception { |
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ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
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new ObjectOutputStream(bout).writeObject(oldOne); |
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SecureRandom newOne = (SecureRandom) new ObjectInputStream( |
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new ByteArrayInputStream(bout.toByteArray())).readObject(); |
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if (!oldOne.toString().equals(newOne.toString())) { |
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throw new Exception(newOne + " is not " + oldOne); |
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} |
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return newOne; |
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} |
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} |