javax.crypto

Class SecretKeyFactorySpi

java.lang.Object

javax.crypto.SecretKeyFactorySpi

Direct Known Subclasses:

BaseSecretKeyFactory

public abstract class SecretKeyFactorySpi
extends Object

The Service Provider Interface (SPI) definition for the SecretKeyFactory class.

Constructor Summary

Constructors

Constructor and Description
SecretKeyFactorySpi() Creates a new SecretKeyFactorySpi instance.

Method Summary

Modifier and Type	Method and Description
protected abstract SecretKey	engineGenerateSecret(KeySpec keySpec) Generate a secret key from the specified key specification.
protected abstract KeySpec	engineGetKeySpec(SecretKey key, Class keySpec) Returns the key specification of the specified secret key.
protected abstract SecretKey	engineTranslateKey(SecretKey key) Translates the specified secret key into an instance of the corresponding key from the provider of this key factory.

Methods inherited from class java.lang.Object

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

Constructor Detail

SecretKeyFactorySpi

public SecretKeyFactorySpi()

Creates a new SecretKeyFactorySpi instance.

Method Detail

engineGenerateSecret

protected abstract SecretKey engineGenerateSecret(KeySpec keySpec)
                                           throws InvalidKeySpecException

Generate a secret key from the specified key specification.

Parameters:

keySpec - the key specification.

Returns:

a secret key.

Throws:

InvalidKeySpecException - if the specified key specification cannot be used to generate a secret key.

engineGetKeySpec

protected abstract KeySpec engineGetKeySpec(SecretKey key,
                                            Class keySpec)
                                     throws InvalidKeySpecException

Returns the key specification of the specified secret key.

Parameters:

key - the secret key to get the specification from.

keySpec - the target key specification class.

Returns:

an instance of the specified key specification class.

Throws:

InvalidKeySpecException - if the specified secret key cannot be transformed into the requested key specification.

engineTranslateKey

protected abstract SecretKey engineTranslateKey(SecretKey key)
                                         throws InvalidKeyException

Translates the specified secret key into an instance of the corresponding key from the provider of this key factory.

Parameters:

key - the secret key to translate.

Returns:

the corresponding translated key.

Throws:

InvalidKeyException - if the specified key cannot be translated using this key factory.