AlgorithmParameterGeneratorSpi
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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
Inherited Method Summary
From class
java.lang.Object
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Object
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clone()
Creates and returns a copy of this Object.
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boolean
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equals( Object obj)
Compares this instance with the specified object and indicates if they
are equal.
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void
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finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
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final
Class<?>
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getClass()
Returns the unique instance of Class that represents this
object's class.
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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notify()
Causes a thread which is waiting on this object's monitor (by means of
calling one of the wait() methods) to be woken up.
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final
void
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notifyAll()
Causes all threads which are waiting on this object's monitor (by means
of calling one of the wait() methods) to be woken up.
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
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final
void
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wait(long timeout, int nanos)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait(long timeout)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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Public Constructors
public
AlgorithmParameterGeneratorSpi
()
Protected Methods
protected
abstract
AlgorithmParameters
engineGenerateParameters
()
Generates the parameters.
Returns
- the new AlgorithmParameters object.
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. |
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.
|
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Last updated 2024-07-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-10 UTC."],[[["\u003cp\u003e\u003ccode\u003eAlgorithmParameterGeneratorSpi\u003c/code\u003e is a Service Provider Interface (SPI) for generating algorithm parameters.\u003c/p\u003e\n"],["\u003cp\u003eIt requires cryptographic providers to implement methods for initializing and generating algorithm parameters.\u003c/p\u003e\n"],["\u003cp\u003eProviders must offer default initialization if the client doesn't explicitly initialize the \u003ccode\u003eAlgorithmParameterGenerator\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe class includes methods for generating parameters and initializing the generator based on size or specific values.\u003c/p\u003e\n"]]],[],null,["# AlgorithmParameterGeneratorSpi\n\npublic abstract class **AlgorithmParameterGeneratorSpi** extends [Object](../../../reference/java/lang/Object.html) \nThis class defines the *Service Provider Interface* (**SPI** )\nfor the `AlgorithmParameterGenerator` class, which\nis used to generate a set of parameters to be used with a certain algorithm.\n\nAll the abstract methods in this class must be implemented by each\ncryptographic service provider who wishes to supply the implementation\nof a parameter generator for a particular algorithm.\n\nIn case the client does not explicitly initialize the\nAlgorithmParameterGenerator (via a call to an `engineInit`\nmethod), each provider must supply (and document) a default initialization.\nFor example, the Sun provider uses a default modulus prime size of 1024\nbits for the generation of DSA parameters. \n\n##### See Also\n\n- [AlgorithmParameterGenerator](../../../reference/java/security/AlgorithmParameterGenerator.html)\n- [AlgorithmParameters](../../../reference/java/security/AlgorithmParameters.html)\n- [AlgorithmParameterSpec](../../../reference/java/security/spec/AlgorithmParameterSpec.html) \n\n### Public Constructor Summary\n\n|---|-------------------------------------------------------------------------------------------------------------------------------------------|\n| | [AlgorithmParameterGeneratorSpi](../../../reference/java/security/AlgorithmParameterGeneratorSpi.html#AlgorithmParameterGeneratorSpi())() |\n\n### Protected Method Summary\n\n|-------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| abstract [AlgorithmParameters](../../../reference/java/security/AlgorithmParameters.html) | [engineGenerateParameters](../../../reference/java/security/AlgorithmParameterGeneratorSpi.html#engineGenerateParameters())() Generates the parameters. |\n| abstract void | [engineInit](../../../reference/java/security/AlgorithmParameterGeneratorSpi.html#engineInit(java.security.spec.AlgorithmParameterSpec,%20java.security.SecureRandom))([AlgorithmParameterSpec](../../../reference/java/security/spec/AlgorithmParameterSpec.html) genParamSpec, [SecureRandom](../../../reference/java/security/SecureRandom.html) random) Initializes this parameter generator with a set of algorithm-specific parameter generation values. |\n| abstract void | [engineInit](../../../reference/java/security/AlgorithmParameterGeneratorSpi.html#engineInit(int,%20java.security.SecureRandom))(int size, [SecureRandom](../../../reference/java/security/SecureRandom.html) random) Initializes this parameter generator for a certain size and source of randomness. |\n\n### Inherited Method Summary\n\nFrom class [java.lang.Object](../../../reference/java/lang/Object.html) \n\n|-------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [Object](../../../reference/java/lang/Object.html) | [clone](../../../reference/java/lang/Object.html#clone())() Creates and returns a copy of this `Object`. |\n| boolean | [equals](../../../reference/java/lang/Object.html#equals(java.lang.Object))([Object](../../../reference/java/lang/Object.html) obj) Compares this instance with the specified object and indicates if they are equal. |\n| void | [finalize](../../../reference/java/lang/Object.html#finalize())() Invoked when the garbage collector has detected that this instance is no longer reachable. |\n| final [Class](../../../reference/java/lang/Class.html)\\\u003c?\\\u003e | [getClass](../../../reference/java/lang/Object.html#getClass())() Returns the unique instance of [Class](../../../reference/java/lang/Class.html) that represents this object's class. |\n| int | [hashCode](../../../reference/java/lang/Object.html#hashCode())() Returns an integer hash code for this object. |\n| final void | [notify](../../../reference/java/lang/Object.html#notify())() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |\n| final void | [notifyAll](../../../reference/java/lang/Object.html#notifyAll())() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |\n| [String](../../../reference/java/lang/String.html) | [toString](../../../reference/java/lang/Object.html#toString())() Returns a string containing a concise, human-readable description of this object. |\n| final void | [wait](../../../reference/java/lang/Object.html#wait(long,%20int))(long timeout, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |\n| final void | [wait](../../../reference/java/lang/Object.html#wait(long))(long timeout) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |\n| final void | [wait](../../../reference/java/lang/Object.html#wait())() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object. |\n\nPublic Constructors\n-------------------\n\n#### public\n**AlgorithmParameterGeneratorSpi**\n()\n\n\u003cbr /\u003e\n\nProtected Methods\n-----------------\n\n#### protected abstract [AlgorithmParameters](../../../reference/java/security/AlgorithmParameters.html)\n**engineGenerateParameters**\n()\n\nGenerates the parameters. \n\n##### Returns\n\n- the new AlgorithmParameters object. \n\n#### protected abstract void\n**engineInit**\n([AlgorithmParameterSpec](../../../reference/java/security/spec/AlgorithmParameterSpec.html) genParamSpec, [SecureRandom](../../../reference/java/security/SecureRandom.html) random)\n\nInitializes this parameter generator with a set of\nalgorithm-specific parameter generation values. \n\n##### Parameters\n\n| genParamSpec | the set of algorithm-specific parameter generation values. |\n| random | the source of randomness. |\n|--------------|------------------------------------------------------------|\n\n##### Throws\n\n| [InvalidAlgorithmParameterException](../../../reference/java/security/InvalidAlgorithmParameterException.html) | if the given parameter generation values are inappropriate for this parameter generator. |\n|----------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------|\n\n#### protected abstract void\n**engineInit**\n(int size, [SecureRandom](../../../reference/java/security/SecureRandom.html) random)\n\nInitializes this parameter generator for a certain size\nand source of randomness. \n\n##### Parameters\n\n| size | the size (number of bits). |\n| random | the source of randomness. |\n|--------|----------------------------|"]]
