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87 lines
2.3 KiB
87 lines
2.3 KiB
/*
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*/
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package java.security;
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import java.security.spec.AlgorithmParameterSpec;
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/**
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* This class defines the <i>Service Provider Interface</i> (<b>SPI</b>)
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* for the {@code AlgorithmParameterGenerator} class, which
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* is used to generate a set of parameters to be used with a certain algorithm.
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*
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* <p> All the abstract methods in this class must be implemented by each
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* cryptographic service provider who wishes to supply the implementation
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* of a parameter generator for a particular algorithm.
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*
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* <p> In case the client does not explicitly initialize the
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* AlgorithmParameterGenerator (via a call to an {@code engineInit}
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* method), each provider must supply (and document) a default initialization.
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* For example, the Sun provider uses a default modulus prime size of 1024
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* bits for the generation of DSA parameters.
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*
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* @author Jan Luehe
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*
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*
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* @see AlgorithmParameterGenerator
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* @see AlgorithmParameters
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* @see java.security.spec.AlgorithmParameterSpec
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*
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* @since 1.2
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*/
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public abstract class AlgorithmParameterGeneratorSpi {
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/**
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* Initializes this parameter generator for a certain size
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* and source of randomness.
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*
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* @param size the size (number of bits).
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* @param random the source of randomness.
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*/
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protected abstract void engineInit(int size, SecureRandom random);
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/**
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* Initializes this parameter generator with a set of
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* algorithm-specific parameter generation values.
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*
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* @param genParamSpec the set of algorithm-specific parameter generation values.
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* @param random the source of randomness.
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*
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* @exception InvalidAlgorithmParameterException if the given parameter
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* generation values are inappropriate for this parameter generator.
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*/
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protected abstract void engineInit(AlgorithmParameterSpec genParamSpec,
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SecureRandom random)
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throws InvalidAlgorithmParameterException;
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/**
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* Generates the parameters.
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*
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* @return the new AlgorithmParameters object.
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*/
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protected abstract AlgorithmParameters engineGenerateParameters();
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}
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