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/*
* 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;
}
}
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