94 lines
3.5 KiB
Java
94 lines
3.5 KiB
Java
/*
|
|
* Copyright (c) 2016, 2018, 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.
|
|
*/
|
|
|
|
import java.security.DrbgParameters;
|
|
import java.security.SecureRandom;
|
|
import java.security.Security;
|
|
|
|
import sun.security.provider.SeedGenerator;
|
|
/**
|
|
* @test
|
|
* @bug 8051408 8202608
|
|
* @modules java.base/sun.security.provider
|
|
* @build java.base/sun.security.provider.SeedGenerator
|
|
* @run main/othervm CommonSeeder
|
|
* @summary check entropy reading of DRBGs
|
|
*/
|
|
public class CommonSeeder {
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
|
|
byte[] result = new byte[10];
|
|
|
|
// Use patched SeedGenerator in java.base/sun/security/provider/.
|
|
|
|
// Nothing happened yet
|
|
SeedGenerator.checkUsage(0);
|
|
|
|
SecureRandom sr;
|
|
sr = SecureRandom.getInstance("DRBG");
|
|
|
|
// No entropy reading if only getInstance
|
|
SeedGenerator.checkUsage(0);
|
|
|
|
// Entropy is read at 1st nextBytes of the 1st DRBG
|
|
sr.nextInt();
|
|
SeedGenerator.checkUsage(1);
|
|
|
|
for (String mech : new String[]{"Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
|
|
System.out.println("Testing " + mech + "...");
|
|
|
|
// DRBG with pr_false will never read entropy again no matter
|
|
// if nextBytes or reseed is called.
|
|
|
|
Security.setProperty("securerandom.drbg.config", mech);
|
|
sr = SecureRandom.getInstance("DRBG");
|
|
sr.nextInt();
|
|
sr.reseed();
|
|
SeedGenerator.checkUsage(0);
|
|
|
|
// DRBG with pr_true always read from default entropy, and
|
|
// its nextBytes always reseed itself
|
|
|
|
Security.setProperty("securerandom.drbg.config",
|
|
mech + ",pr_and_reseed");
|
|
sr = SecureRandom.getInstance("DRBG");
|
|
|
|
sr.nextInt();
|
|
SeedGenerator.checkUsage(2); // one instantiate, one reseed
|
|
sr.nextInt();
|
|
SeedGenerator.checkUsage(1); // one reseed in nextBytes
|
|
sr.reseed();
|
|
SeedGenerator.checkUsage(1); // one reseed
|
|
sr.nextBytes(result, DrbgParameters.nextBytes(-1, false, null));
|
|
SeedGenerator.checkUsage(0); // pr_false for this call
|
|
sr.nextBytes(result, DrbgParameters.nextBytes(-1, true, null));
|
|
SeedGenerator.checkUsage(1); // pr_true for this call
|
|
sr.reseed(DrbgParameters.reseed(true, null));
|
|
SeedGenerator.checkUsage(1); // reseed from es
|
|
sr.reseed(DrbgParameters.reseed(false, null));
|
|
SeedGenerator.checkUsage(0); // reseed from AbstractDrbg.SeederHolder.seeder
|
|
}
|
|
}
|
|
}
|