de.cscc.crypto.provider
Class DESede3KeySecretKeyFactoryEngine

java.lang.Object
  javax.crypto.SecretKeyFactorySpi
      de.cscc.crypto.provider.DESede3KeySecretKeyFactoryEngine

public final class DESede3KeySecretKeyFactoryEngine

extends SecretKeyFactorySpi

DESede3KeySecretKeyFactoryEngine Class.

Version:

$Revision: 1.10 $

Author:

Uwe Günther

Constructor Summary

DESede3KeySecretKeyFactoryEngine()
Creates new DESede3KeySecretKeyFactoryEngine.

Method Summary

protected SecretKey	engineGenerateSecret(KeySpec keySpec) Generates a SecretKey object from the provided key specification (key material).
protected KeySpec	engineGetKeySpec(SecretKey key, Class keySpec) Returns a specification (key material) of the given key object in the requested format.
protected SecretKey	engineTranslateKey(SecretKey key) Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this secret-key factory.
String	toString() Returns a string representation of the object.

Methods inherited from class java.lang.Object

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

Constructor Detail

DESede3KeySecretKeyFactoryEngine

public DESede3KeySecretKeyFactoryEngine()

Creates new DESede3KeySecretKeyFactoryEngine.

Throws:

SecurityException - if the provider self integrity check fails.

Method Detail

toString

public String toString()

Returns a string representation of the object.

Returns:

a string representation of the object.

engineGenerateSecret

protected SecretKey engineGenerateSecret(KeySpec keySpec)
                                  throws InvalidKeySpecException

Generates a SecretKey object from the provided key specification (key material).

Parameters:

keySpec - the specification (key material) of the secret key.

Returns:

the secret key.

Throws:

InvalidKeySpecException - if the given key specification is inappropriate for this secret-key factory to produce a secret key.

engineGetKeySpec

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

Returns a specification (key material) of the given key object in the requested format.

Parameters:

key - the key.

keySpec - the requested format in which the key material shall be returned.

Returns:

the underlying key specification (key material) in the requested format.

Throws:

NullPointerException - if key or keySpec is null.

InvalidKeySpecException - if the requested key specification is inappropriate for the given key (e.g., the algorithms associated with key and keySpec do not match, or key references a key on a cryptographic hardware device whereas keySpec is the specification of a software-based key), or the given key cannot be dealt with (e.g., the given key has an algorithm or format not supported by this secret-key factory).

engineTranslateKey

protected SecretKey engineTranslateKey(SecretKey key)
                                throws InvalidKeyException

Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this secret-key factory.

Parameters:

key - the key whose provider is unknown or untrusted.

Returns:

they key whose provider is unknown or untrusted.

Throws:

NullPointerException - if key is null.

InvalidKeyException - if the given key cannot be processed by this secret-key factory.