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/*
* 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 javax.crypto;
import java.security.InvalidAlgorithmParameterException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
/**
* The <i>Service Provider Interface</i> (<b>SPI</b>) definition for the
* {@code KeyGenerator} class.
*
* @see KeyGenerator
*/
public abstract class KeyGeneratorSpi {
/**
* Creates a new {@code KeyGeneratorSpi} instance.
*/
public KeyGeneratorSpi() {
}
/**
* Generates a secret key.
*
* @return the generated secret key.
*/
protected abstract SecretKey engineGenerateKey();
/**
* Initializes this {@code KeyGeneratorSpi} instance with the specified
* algorithm parameters and randomness source.
*
* @param params
* the parameters for the key generation algorithm.
* @param random
* the randomness source for any random bytes.
* @throws InvalidAlgorithmParameterException
* if the parameters cannot be uses to initialize this key
* generator algorithm.
*/
protected abstract void engineInit(AlgorithmParameterSpec params,
SecureRandom random) throws InvalidAlgorithmParameterException;
/**
* Initializes this {@code KeyGenerator} instance for the specified key
* size (in bits) using the specified randomness source.
*
* @param keysize
* the size of the key (in bits).
* @param random
* the randomness source for any random bytes.
*/
protected abstract void engineInit(int keysize, SecureRandom random);
/**
* Initializes this {@code KeyGenerator} with the specified randomness
* source.
*
* @param random
* the randomness source for any random bytes.
*/
protected abstract void engineInit(SecureRandom random);
}
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