java.security.SecureRandomSpi Maven / Gradle / Ivy
/*
* 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 Service Provider Interface (SPI) 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);
}