KeyGeneratorSpi

public abstract class KeyGeneratorSpi extends Object

This class defines the Service Provider Interface (SPI) for the KeyGenerator class. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a key generator for a particular algorithm.

See Also

Public Constructor Summary

Protected Method Summary

abstract SecretKey
engineGenerateKey()
Generates a secret key.
abstract void
engineInit(AlgorithmParameterSpec params, SecureRandom random)
Initializes the key generator with the specified parameter set and a user-provided source of randomness.
abstract void
engineInit(SecureRandom random)
Initializes the key generator.
abstract void
engineInit(int keysize, SecureRandom random)
Initializes this key generator for a certain keysize, using the given source of randomness.

Inherited Method Summary

Public Constructors

public KeyGeneratorSpi ()

Protected Methods

protected abstract SecretKey engineGenerateKey ()

Generates a secret key.

Returns
  • the new key

protected abstract void engineInit (AlgorithmParameterSpec params, SecureRandom random)

Initializes the key generator with the specified parameter set and a user-provided source of randomness.

Parameters
params the key generation parameters
random the source of randomness for this key generator
Throws
InvalidAlgorithmParameterException if params is inappropriate for this key generator

protected abstract void engineInit (SecureRandom random)

Initializes the key generator.

Parameters
random the source of randomness for this generator

protected abstract void engineInit (int keysize, SecureRandom random)

Initializes this key generator for a certain keysize, using the given source of randomness.

Parameters
keysize the keysize. This is an algorithm-specific metric, specified in number of bits.
random the source of randomness for this key generator
Throws
InvalidParameterException if the keysize is wrong or not supported.