程序包 javax.crypto

类 KeyGeneratorSpi

java.lang.Object

javax.crypto.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.

从以下版本开始:

1.4

另请参阅:

SecretKey

构造器概要

构造器

构造器	说明
KeyGeneratorSpi()

方法概要

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

从类继承的方法 java.lang.Object

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

构造器详细资料

KeyGeneratorSpi

public KeyGeneratorSpi()

方法详细资料

engineInit

protected abstract void engineInit(SecureRandom random)

Initializes the key generator.

参数:

random - the source of randomness for this generator

engineInit

protected abstract void engineInit(AlgorithmParameterSpec params,
                                   SecureRandom random)
                            throws InvalidAlgorithmParameterException

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

参数:

params - the key generation parameters

random - the source of randomness for this key generator

抛出:

InvalidAlgorithmParameterException - if params is inappropriate for this key generator

engineInit

protected abstract void engineInit(int keysize,
                                   SecureRandom random)

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

参数:

keysize - the keysize. This is an algorithm-specific metric, specified in number of bits.

random - the source of randomness for this key generator

抛出:

InvalidParameterException - if the keysize is wrong or not supported.

engineGenerateKey

protected abstract SecretKey engineGenerateKey()

Generates a secret key.

返回:

the new key