| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.crypto.random; |
| |
| import java.lang.Thread.State; |
| import java.security.GeneralSecurityException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.junit.Test; |
| |
| public abstract class AbstractRandomTest { |
| |
| public abstract CryptoRandom getCryptoRandom() |
| throws GeneralSecurityException; |
| |
| @Test(timeout = 120000) |
| public void testRandomBytes() throws Exception { |
| try (CryptoRandom random = getCryptoRandom()) { |
| // len = 16 |
| checkRandomBytes(random, 16); |
| // len = 32 |
| checkRandomBytes(random, 32); |
| // len = 128 |
| checkRandomBytes(random, 128); |
| // len = 256 |
| checkRandomBytes(random, 256); |
| } |
| } |
| |
| @Test(timeout = 120000) |
| public void testRandomBytesMultiThreaded() throws Exception { |
| final int threadCount = 100; |
| try (final CryptoRandom random = getCryptoRandom()) { |
| final List<Thread> threads = new ArrayList<>(threadCount); |
| |
| for (int i = 0; i < threadCount; i++) { |
| Thread t = new Thread(() -> { |
| checkRandomBytes(random, 10); |
| checkRandomBytes(random, 1000); |
| checkRandomBytes(random, 100000); |
| }); |
| t.start(); |
| threads.add(t); |
| } |
| |
| for (Thread t : threads) { |
| if (!t.getState().equals(State.NEW)) { |
| t.join(); |
| } |
| } |
| |
| } |
| } |
| |
| /** |
| * Test will timeout if secure random implementation always returns a |
| * constant value. |
| */ |
| private void checkRandomBytes(CryptoRandom random, int len) { |
| byte[] bytes = new byte[len]; |
| byte[] bytes1 = new byte[len]; |
| random.nextBytes(bytes); |
| random.nextBytes(bytes1); |
| |
| while (Arrays.equals(bytes1, new byte[len]) || Arrays.equals(bytes, bytes1)) { |
| random.nextBytes(bytes1); |
| } |
| } |
| } |