Module java.base

Class 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. See the Keysize Restriction sections of the JDK Providers document for information on the AlgorithmParameterGenerator defaults used by JDK providers. However, note that defaults may vary across different providers. Additionally, the default value for a provider may change in a future version. Therefore, it is recommended to explicitly initialize the AlgorithmParameterGenerator instead of relying on provider-specific defaults.

    See Also:
    AlgorithmParameterGenerator, AlgorithmParameters, AlgorithmParameterSpec
    • 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.
        size - the size (number of bits).
        random - the source of randomness.
      • engineGenerateParameters

        protected abstract AlgorithmParameters engineGenerateParameters()
        Generates the parameters.
        the new AlgorithmParameters object.