java.security
Class AlgorithmParameterGeneratorSpi

java.lang.Object   
  java.security.AlgorithmParameterGeneratorSpi

public abstract class AlgorithmParameterGeneratorSpi
extends Object   

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.

Since:

1.2

See Also:

AlgorithmParameterGenerator , AlgorithmParameters , AlgorithmParameterSpec

Constructor Summary

AlgorithmParameterGeneratorSpi ()

Method Summary

protected abstract AlgorithmParameters	engineGenerateParameters () Generates the parameters.
protected abstract void	engineInit (AlgorithmParameterSpec genParamSpec, SecureRandom random) Initializes this parameter generator with a set of algorithm-specific parameter generation values.
protected abstract void	engineInit (int size, SecureRandom random) Initializes this parameter generator for a certain size and source of randomness.

Methods inherited from class java.lang.Object

clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait

Constructor Detail

AlgorithmParameterGeneratorSpi

public AlgorithmParameterGeneratorSpi()

Method Detail

engineInit

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.

engineInit

protected abstract void engineInit(AlgorithmParameterSpec    genParamSpec,
                                   SecureRandom    random)
                            throws InvalidAlgorithmParameterException   

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.

engineGenerateParameters

protected abstract AlgorithmParameters    engineGenerateParameters()

Generates the parameters.

Returns:

the new AlgorithmParameters object.