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Java Platform 1.2 Beta 4 |
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java.lang.Object | +--java.security.AlgorithmParameterGenerator
AlgorithmParameterGenerator
class is used to generate a
set of
parameters to be used with a certain algorithm. Parameter generators
are constructed using the getInstance
factory methods
(static methods that return instances of a given class).
The object that will generate the parameters can be initialized in two different ways: in an algorithm-independent manner, or in an algorithm-specific manner:
In case the client does not explicitly initialize the
AlgorithmParameterGenerator
(via a call to an init
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.
AlgorithmParameters
,
AlgorithmParameterSpec
Constructor Summary | |
AlgorithmParameterGenerator(AlgorithmParameterGeneratorSpi paramGenSpi,
Provider provider,
String algorithm)
Creates an AlgorithmParameterGenerator object. |
Method Summary | |
AlgorithmParameters | generateParameters()
Generates the parameters. |
String | getAlgorithm()
Returns the standard name of the algorithm this parameter generator is associated with. |
static AlgorithmParameterGenerator | getInstance(String algorithm,
String provider)
Generates an AlgorithmParameterGenerator object for the requested algorithm, as supplied from the specified provider, if such a parameter generator is available from the provider. |
static AlgorithmParameterGenerator | getInstance(String algorithm)
Generates an AlgorithmParameterGenerator object that implements the specified digest algorithm. |
Provider | getProvider()
Returns the provider of this algorithm parameter generator object. |
void | init(AlgorithmParameterSpec genParamSpec,
SecureRandom random)
Initializes this parameter generator with a set of algorithm-specific parameter generation values. |
void | init(AlgorithmParameterSpec genParamSpec)
Initializes this parameter generator with a set of algorithm-specific parameter generation values. |
void | init(int strength,
SecureRandom random)
Initializes this parameter generator for a certain strength and source of randomness. |
void | init(int strength)
Initializes this parameter generator for a certain strength. |
Methods inherited from class java.lang.Object | |
clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait |
Constructor Detail |
protected AlgorithmParameterGenerator(AlgorithmParameterGeneratorSpi paramGenSpi, Provider provider, String algorithm)
keyFacSpi
- the delegate
provider
- the provider
algorithm
- the algorithmMethod Detail |
public final String getAlgorithm()
public static final AlgorithmParameterGenerator getInstance(String algorithm) throws NoSuchAlgorithmException
algorithm
- the string name of the algorithm this
parameter generator is associated with.public static final AlgorithmParameterGenerator getInstance(String algorithm, String provider) throws NoSuchAlgorithmException, NoSuchProviderException
algorithm
- the string name of the algorithm.
provider
- the string name of the provider.Provider
public final Provider getProvider()
public final void init(int strength)
strength
- the strength (number of bits).public final void init(int strength, SecureRandom random)
strength
- the strength (number of bits).
random
- the source of randomness.public final void init(AlgorithmParameterSpec genParamSpec) throws InvalidAlgorithmParameterException
params
- the set of algorithm-specific parameter generation values.public final void init(AlgorithmParameterSpec genParamSpec, SecureRandom random) throws InvalidAlgorithmParameterException
params
- the set of algorithm-specific parameter generation values.
random
- the source of randomness.public final AlgorithmParameters generateParameters()
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Java Platform 1.2 Beta 4 |
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