| /* |
| * 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 java.security; |
| |
| import java.io.Serializable; |
| |
| /** |
| * {@code SecureRandomSpi} is the <i>Service Provider Interface</i> (<b>SPI</b>) definition |
| * for {@link SecureRandom}. |
| * |
| * @see SecureRandom |
| */ |
| public abstract class SecureRandomSpi implements Serializable { |
| |
| private static final long serialVersionUID = -2991854161009191830L; |
| |
| /** |
| * Reseeds this {@code SecureRandomSpi} instance with the specified {@code |
| * seed}. The seed of this {@code SecureRandomSpi} instance is supplemented, |
| * not replaced. |
| * |
| * @param seed |
| * the new seed. |
| */ |
| protected abstract void engineSetSeed(byte[] seed); |
| |
| /** |
| * Generates and stores random bytes in the given {@code byte[]} for each |
| * array element. |
| * |
| * @param bytes |
| * the {@code byte[]} to be filled with random bytes. |
| */ |
| protected abstract void engineNextBytes(byte[] bytes); |
| |
| /** |
| * Generates and returns the specified number of seed bytes, computed using |
| * the seed generation algorithm used by this {@code SecureRandomSpi}. |
| * |
| * @param numBytes |
| * the number of seed bytes. |
| * @return the seed bytes |
| */ |
| protected abstract byte[] engineGenerateSeed(int numBytes); |
| } |