java.security.AlgorithmParameterGeneratorSpi Maven / Gradle / Ivy
/*
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This work corresponds to the API signatures of JSR 219: Foundation
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*/
package java.security;
import java.security.spec.AlgorithmParameterSpec;
/**
* This class defines the Service Provider Interface (SPI)
* for the AlgorithmParameterGenerator class, which
* is used to generate a set of parameters to be used with a certain algorithm.
*
*
All the abstract methods in this class must be implemented by each
* cryptographic service provider who wishes to supply the implementation
* of a parameter generator for a particular algorithm.
*
*
In case the client does not explicitly initialize the
* AlgorithmParameterGenerator (via a call to an engineInit
* method), each provider must supply (and document) a default initialization.
* For example, the Sun provider uses a default modulus prime size of 1024
* bits for the generation of DSA parameters.
*
* @author Jan Luehe
*
* @version 1.11, 02/02/00
*
* @see AlgorithmParameterGenerator
* @see AlgorithmParameters
* @see java.security.spec.AlgorithmParameterSpec
*
* @since 1.2
*/
public abstract class AlgorithmParameterGeneratorSpi
{
public AlgorithmParameterGeneratorSpi() { }
/**
* Initializes this parameter generator for a certain size
* and source of randomness.
*
* @param size the size (number of bits).
* @param random the source of randomness.
*/
protected abstract void engineInit(int size, SecureRandom random);
/**
* Initializes this parameter generator with a set of
* algorithm-specific parameter generation values.
*
* @param genParamSpec the set of algorithm-specific parameter generation values.
* @param random the source of randomness.
*
* @exception InvalidAlgorithmParameterException if the given parameter
* generation values are inappropriate for this parameter generator.
*/
protected abstract void engineInit(AlgorithmParameterSpec genParamSpec,
SecureRandom random) throws InvalidAlgorithmParameterException;
/**
* Generates the parameters.
*
* @return the new AlgorithmParameters object.
*/
protected abstract AlgorithmParameters engineGenerateParameters();
}