java.security

Class AlgorithmParameterGenerator

java.lang.Object

java.security.AlgorithmParameterGenerator

public class AlgorithmParameterGenerator
extends Object

AlgorithmParameterGenerator is an engine class which is capable of generating parameters for the algorithm it was initialized with.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AlgorithmParameterGenerator(AlgorithmParameterGeneratorSpi paramGenSpi, Provider provider, String algorithm) Constructs a new instance of AlgorithmParameterGenerator with the given arguments.

Method Summary

Modifier and Type	Method and Description
AlgorithmParameters	generateParameters() Computes and returns AlgorithmParameters for this generator's algorithm.
String	getAlgorithm() Returns the name of the algorithm.
static AlgorithmParameterGenerator	getInstance(String algorithm) Returns a new instance of AlgorithmParameterGenerator for the specified algorithm.
static AlgorithmParameterGenerator	getInstance(String algorithm, Provider provider) Returns a new instance of AlgorithmParameterGenerator from the specified provider for the specified algorithm.
static AlgorithmParameterGenerator	getInstance(String algorithm, String provider) Returns a new instance of AlgorithmParameterGenerator from the specified provider for the specified algorithm.
Provider	getProvider() Returns the provider associated with this AlgorithmParameterGenerator.
void	init(AlgorithmParameterSpec genParamSpec) Initializes this AlgorithmParameterGenerator with the given AlgorithmParameterSpec.
void	init(AlgorithmParameterSpec genParamSpec, SecureRandom random) Initializes this AlgorithmParameterGenerator with the given AlgorithmParameterSpec and the given SecureRandom.
void	init(int size) Initializes this AlgorithmParameterGenerator with the given size.
void	init(int size, SecureRandom random) Initializes this AlgorithmParameterGenerator with the given size and the given SecureRandom.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AlgorithmParameterGenerator

protected AlgorithmParameterGenerator(AlgorithmParameterGeneratorSpi paramGenSpi,
                                      Provider provider,
                                      String algorithm)

Constructs a new instance of AlgorithmParameterGenerator with the given arguments.

Parameters:

paramGenSpi - a concrete implementation, this engine instance delegates to.

provider - the provider.

algorithm - the name of the algorithm.

Method Detail

getAlgorithm

public final String getAlgorithm()

Returns the name of the algorithm.

Returns:

the name of the algorithm.

getInstance

public static AlgorithmParameterGenerator getInstance(String algorithm)
                                               throws NoSuchAlgorithmException

Returns a new instance of AlgorithmParameterGenerator for the specified algorithm.

Parameters:

algorithm - the name of the algorithm to use.

Returns:

a new instance of AlgorithmParameterGenerator for the specified algorithm.

Throws:

NoSuchAlgorithmException - if the specified algorithm is not available.

NullPointerException - if algorithm is null.

getInstance

public static AlgorithmParameterGenerator getInstance(String algorithm,
                                                      String provider)
                                               throws NoSuchAlgorithmException,
                                                      NoSuchProviderException

Returns a new instance of AlgorithmParameterGenerator from the specified provider for the specified algorithm.

Parameters:

algorithm - the name of the algorithm to use.

provider - name of the provider of the AlgorithmParameterGenerator.

Returns:

a new instance of AlgorithmParameterGenerator for the specified algorithm.

Throws:

NoSuchAlgorithmException - if the specified algorithm is not available.

NoSuchProviderException - if the specified provider is not available.

IllegalArgumentException - if provider == null || provider.isEmpty()

NullPointerException - if algorithm is null.

getInstance

public static AlgorithmParameterGenerator getInstance(String algorithm,
                                                      Provider provider)
                                               throws NoSuchAlgorithmException

Returns a new instance of AlgorithmParameterGenerator from the specified provider for the specified algorithm. The provider supplied does not have to be registered.

Parameters:

algorithm - the name of the algorithm to use.

provider - the provider of the AlgorithmParameterGenerator.

Returns:

a new instance of AlgorithmParameterGenerator for the specified algorithm.

Throws:

NoSuchAlgorithmException - if the specified algorithm is not available.

NullPointerException - if algorithm is null.

IllegalArgumentException - if provider == null

getProvider

public final Provider getProvider()

Returns the provider associated with this AlgorithmParameterGenerator.

Returns:

the provider associated with this AlgorithmParameterGenerator.

init

public final void init(int size)

Initializes this AlgorithmParameterGenerator with the given size. The default parameter set and a default SecureRandom instance will be used.

Parameters:

size - the size (in number of bits).

init

public final void init(int size,
                       SecureRandom random)

Initializes this AlgorithmParameterGenerator with the given size and the given SecureRandom. The default parameter set will be used.

Parameters:

size - the size (in number of bits).

random - the source of randomness.

init

public final void init(AlgorithmParameterSpec genParamSpec)
                throws InvalidAlgorithmParameterException

Initializes this AlgorithmParameterGenerator with the given AlgorithmParameterSpec. A default SecureRandom instance will be used.

Parameters:

genParamSpec - the parameters to use.

Throws:

InvalidAlgorithmParameterException - if the specified parameters are not supported.

init

public final void init(AlgorithmParameterSpec genParamSpec,
                       SecureRandom random)
                throws InvalidAlgorithmParameterException

Initializes this AlgorithmParameterGenerator with the given AlgorithmParameterSpec and the given SecureRandom.

Parameters:

genParamSpec - the parameters to use.

random - the source of randomness.

Throws:

InvalidAlgorithmParameterException - if the specified parameters are not supported.

generateParameters

public final AlgorithmParameters generateParameters()

Computes and returns AlgorithmParameters for this generator's algorithm.

Returns:

AlgorithmParameters for this generator's algorithm.