public abstract class

AlgorithmParameterGeneratorSpi

extends Object
java.lang.Object
   ↳ java.security.AlgorithmParameterGeneratorSpi
Known Direct Subclasses

Class Overview

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.

Summary

Public Constructors
AlgorithmParameterGeneratorSpi()
Protected Methods
abstract AlgorithmParameters engineGenerateParameters()
Generates the parameters.
abstract void engineInit(int size, SecureRandom random)
Initializes this parameter generator for a certain size and source of randomness.
abstract void engineInit(AlgorithmParameterSpec genParamSpec, SecureRandom random)
Initializes this parameter generator with a set of algorithm-specific parameter generation values.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public AlgorithmParameterGeneratorSpi ()

Protected Methods

protected abstract AlgorithmParameters engineGenerateParameters ()

Generates the parameters.

Returns
  • the new AlgorithmParameters object.

protected abstract void engineInit (int size, SecureRandom random)

Initializes this parameter generator for a certain size and source of randomness.

Parameters
size the size (number of bits).
random the source of randomness.

protected abstract void engineInit (AlgorithmParameterSpec genParamSpec, SecureRandom random)

Initializes this parameter generator with a set of algorithm-specific parameter generation values.

Parameters
genParamSpec the set of algorithm-specific parameter generation values.
random the source of randomness.
Throws
InvalidAlgorithmParameterException if the given parameter generation values are inappropriate for this parameter generator.