| /* |
| * 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.sshd.common.random; |
| |
| import java.security.SecureRandom; |
| |
| /** |
| * A <code>Random</code> implementation using the built-in {@link SecureRandom} PRNG. |
| * |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public class JceRandom extends AbstractRandom { |
| public static final String NAME = "JCE"; |
| |
| private byte[] tmp = new byte[16]; |
| private final SecureRandom random = new SecureRandom(); |
| |
| public JceRandom() { |
| super(); |
| } |
| |
| @Override |
| public String getName() { |
| return NAME; |
| } |
| |
| @Override |
| public synchronized void fill(byte[] foo, int start, int len) { |
| if ((start == 0) && (len == foo.length)) { |
| random.nextBytes(foo); |
| } else { |
| if (len > tmp.length) { |
| tmp = new byte[len]; |
| } |
| random.nextBytes(tmp); |
| System.arraycopy(tmp, 0, foo, start, len); |
| } |
| } |
| |
| @Override |
| public synchronized int random(int n) { |
| return random.nextInt(n); |
| } |
| } |