AlgorithmParameterGeneratorSpi (Java SE 9 & JDK 9 ) (original) (raw)

• 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. See the Keysize Restriction sections of theJDK 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.
Since:
1.2
See Also:
AlgorithmParameterGenerator, AlgorithmParameters, AlgorithmParameterSpec

• • Constructor Summary

  Constructors

  Constructor	Description
  AlgorithmParameterGeneratorSpi​()

  • Method Summary

  All Methods Instance Methods Abstract Methods

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

     * ### Methods inherited from class java.lang.[Object](../../java/lang/Object.html "class in java.lang")  
     `[clone](../../java/lang/Object.html#clone--), [equals](../../java/lang/Object.html#equals-java.lang.Object-), [finalize](../../java/lang/Object.html#finalize--), [getClass](../../java/lang/Object.html#getClass--), [hashCode](../../java/lang/Object.html#hashCode--), [notify](../../java/lang/Object.html#notify--), [notifyAll](../../java/lang/Object.html#notifyAll--), [toString](../../java/lang/Object.html#toString--), [wait](../../java/lang/Object.html#wait--), [wait](../../java/lang/Object.html#wait-long-), [wait](../../java/lang/Object.html#wait-long-int-)`

• • Constructor Detail

     * #### AlgorithmParameterGeneratorSpi  
     public AlgorithmParameterGeneratorSpi​()  

  • Method Detail

    * #### engineInit  
    protected abstract void engineInit​(int size,  
                                       [SecureRandom](../../java/security/SecureRandom.html "class in java.security") 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](../../java/security/spec/AlgorithmParameterSpec.html "interface in java.security.spec") genParamSpec,  
                                       [SecureRandom](../../java/security/SecureRandom.html "class in java.security") random)  
                                throws [InvalidAlgorithmParameterException](../../java/security/InvalidAlgorithmParameterException.html "class in java.security")  
    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](../../java/security/InvalidAlgorithmParameterException.html "class in java.security")` \- if the given parameter generation values are inappropriate for this parameter generator.  
    * #### engineGenerateParameters  
    protected abstract [AlgorithmParameters](../../java/security/AlgorithmParameters.html "class in java.security") engineGenerateParameters​()  
    Generates the parameters.  
    Returns:  
    the new AlgorithmParameters object.

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