102 lines
3.8 KiB
Java
102 lines
3.8 KiB
Java
/*
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* Copyright (c) 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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/*
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* @test
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* @bug 8141039
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* @library /lib/testlibrary
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* @summary Check SecureRandom generate expected seed counts what the caller
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* asked for.
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* @run main/othervm EnoughSeedTest
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*/
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import java.security.SecureRandom;
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import java.security.Security;
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import static java.lang.Math.*;
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public class EnoughSeedTest {
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private static final String DRBG_CONFIG = "securerandom.drbg.config";
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private static final String DRBG_CONFIG_VALUE
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= Security.getProperty(DRBG_CONFIG);
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public static void main(String[] args) {
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System.setProperty("java.security.egd", "file:/dev/urandom");
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boolean success = true;
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for (String mech : new String[]{
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"SHA1PRNG", "Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
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System.out.printf("%nTest for SecureRandom algorithm: '%s'", mech);
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try {
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SecureRandom sr = null;
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if (!mech.contains("_DRBG")) {
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sr = SecureRandom.getInstance(mech);
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} else {
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Security.setProperty(DRBG_CONFIG, mech);
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sr = SecureRandom.getInstance("DRBG");
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}
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success &= forEachSeedBytes(sr);
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System.out.printf("%nCompleted test for SecureRandom "
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+ "mechanism: '%s'", mech);
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} catch (Exception e) {
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success &= false;
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e.printStackTrace(System.out);
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} finally {
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Security.setProperty(DRBG_CONFIG, DRBG_CONFIG_VALUE);
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}
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}
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if (!success) {
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throw new RuntimeException("At least one test failed.");
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}
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}
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/**
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* Generates fixed number of seed bytes through a SecureRandom instance
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* to verify it's seed generation status.
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* @param sr SecureRandom instance
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* @return The test success indicator
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*/
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private static boolean forEachSeedBytes(SecureRandom sr) {
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boolean success = true;
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sr.setSeed(1l);
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for (int seedByte : new int[]{Integer.MIN_VALUE, -1, 0, 1, 256, 1024,
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Short.MAX_VALUE, (int) pow(2, 20)}) {
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try {
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byte[] seed = sr.generateSeed(seedByte);
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if (seed.length != seedByte) {
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throw new RuntimeException("Not able to produce expected "
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+ "seed size.");
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}
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} catch (IllegalArgumentException e) {
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if (seedByte >= 0) {
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throw new RuntimeException("Unknown Exception occured.", e);
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}
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System.out.printf("%nPASS - Exception expected when required "
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+ "seed size requested is negative: %s", seedByte);
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}
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}
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return success;
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}
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}
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