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.
Public Constructor Summary
Protected Method Summary
abstract AlgorithmParameters |
engineGenerateParameters()
Generates the parameters.
|
abstract void |
engineInit(AlgorithmParameterSpec genParamSpec, SecureRandom random)
Initializes this parameter generator with a set of
algorithm-specific parameter generation values.
|
abstract void |
engineInit(int size, SecureRandom random)
Initializes this parameter generator for a certain size
and source of randomness.
|
Inherited Method Summary
Public Constructors
public AlgorithmParameterGeneratorSpi ()
Protected Methods
protected abstract AlgorithmParameters engineGenerateParameters ()
Generates the parameters.
Returns
- the new AlgorithmParameters object.
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. |
---|
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. |