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.

AlgorithmParameterGeneratorSpi

public AlgorithmParameterGeneratorSpi()

engineGenerateParameters

protected abstract AlgorithmParameters engineGenerateParameters()

Generates the parameters.

Returns:

the new AlgorithmParameters object.

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.

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.