| /** |
| * 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.hadoop.crypto.random; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| import org.apache.commons.lang.SystemUtils; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.util.Shell.ShellCommandExecutor; |
| import org.junit.Assume; |
| import org.junit.Test; |
| |
| public class TestOsSecureRandom { |
| |
| private static OsSecureRandom getOsSecureRandom() throws IOException { |
| Assume.assumeTrue(SystemUtils.IS_OS_LINUX); |
| OsSecureRandom random = new OsSecureRandom(); |
| random.setConf(new Configuration()); |
| return random; |
| } |
| |
| @Test(timeout=120000) |
| public void testRandomBytes() throws Exception { |
| OsSecureRandom random = getOsSecureRandom(); |
| // len = 16 |
| checkRandomBytes(random, 16); |
| // len = 32 |
| checkRandomBytes(random, 32); |
| // len = 128 |
| checkRandomBytes(random, 128); |
| // len = 256 |
| checkRandomBytes(random, 256); |
| random.close(); |
| } |
| |
| /** |
| * Test will timeout if secure random implementation always returns a |
| * constant value. |
| */ |
| private void checkRandomBytes(OsSecureRandom random, int len) { |
| byte[] bytes = new byte[len]; |
| byte[] bytes1 = new byte[len]; |
| random.nextBytes(bytes); |
| random.nextBytes(bytes1); |
| |
| while (Arrays.equals(bytes, bytes1)) { |
| random.nextBytes(bytes1); |
| } |
| } |
| |
| /** |
| * Test will timeout if secure random implementation always returns a |
| * constant value. |
| */ |
| @Test(timeout=120000) |
| public void testRandomInt() throws Exception { |
| OsSecureRandom random = getOsSecureRandom(); |
| |
| int rand1 = random.nextInt(); |
| int rand2 = random.nextInt(); |
| while (rand1 == rand2) { |
| rand2 = random.nextInt(); |
| } |
| random.close(); |
| } |
| |
| /** |
| * Test will timeout if secure random implementation always returns a |
| * constant value. |
| */ |
| @Test(timeout=120000) |
| public void testRandomLong() throws Exception { |
| OsSecureRandom random = getOsSecureRandom(); |
| |
| long rand1 = random.nextLong(); |
| long rand2 = random.nextLong(); |
| while (rand1 == rand2) { |
| rand2 = random.nextLong(); |
| } |
| random.close(); |
| } |
| |
| /** |
| * Test will timeout if secure random implementation always returns a |
| * constant value. |
| */ |
| @Test(timeout=120000) |
| public void testRandomFloat() throws Exception { |
| OsSecureRandom random = getOsSecureRandom(); |
| |
| float rand1 = random.nextFloat(); |
| float rand2 = random.nextFloat(); |
| while (rand1 == rand2) { |
| rand2 = random.nextFloat(); |
| } |
| random.close(); |
| } |
| |
| /** |
| * Test will timeout if secure random implementation always returns a |
| * constant value. |
| */ |
| @Test(timeout=120000) |
| public void testRandomDouble() throws Exception { |
| OsSecureRandom random = getOsSecureRandom(); |
| |
| double rand1 = random.nextDouble(); |
| double rand2 = random.nextDouble(); |
| while (rand1 == rand2) { |
| rand2 = random.nextDouble(); |
| } |
| random.close(); |
| } |
| |
| @Test(timeout=120000) |
| public void testRefillReservoir() throws Exception { |
| OsSecureRandom random = getOsSecureRandom(); |
| |
| for (int i = 0; i < 8196; i++) { |
| random.nextLong(); |
| } |
| random.close(); |
| } |
| } |