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Class au.net.aba.crypto.provider.DESKeyFactory

java.lang.Object
   |
   +----javax.crypto.SecretKeyFactorySpi
           |
           +----au.net.aba.crypto.provider.DESKeyFactory

public class DESKeyFactory
extends SecretKeyFactorySpi
This class is used to convert DES keys into a format usable by the ABA provider. The supported KeySpec classes are DESKeySpec and SecretKeySpec. In the case of the SecretKeySpec the key data must be at least 8 bytes long and there must be no encoding on the key data. The supported Key class is DESKey.

This class should not be instantiated directly, instead use the java.security.KeyFactory interface.

See Also:
KeyFactory

Variable Index

 o ident

Constructor Index

 o DESKeyFactory()

Method Index

 o engineGenerateSecret(KeySpec)
Generates a DES SecretKey object from the provided key specification (key material).
 o engineGetKeySpec(SecretKey, Class)
Returns a specification (key material) of the given key object in the requested format.
 o engineTranslateKey(SecretKey)
Translates a DES key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this key factory.

Variables

 o ident
 public static final String ident

Constructors

 o DESKeyFactory
 public DESKeyFactory()

Methods

 o engineGenerateSecret
 protected SecretKey engineGenerateSecret(KeySpec keySpec) throws InvalidKeySpecException
Generates a DES SecretKey object from the provided key specification (key material). This class supports the DESKeySpec KeySpec and SecretKeySpec classes.

Returns:
s The secret key.
Throws: InvalidKeySpecException
The provided KeySpec was not a DESKeySpec or SecretKeySpec instance.
Overrides:
engineGenerateSecret in class SecretKeyFactorySpi
 o engineGetKeySpec
 protected KeySpec engineGetKeySpec(SecretKey key,
                                    Class keySpec) throws InvalidKeySpecException
Returns a specification (key material) of the given key object in the requested format.

Currently supports conversion from ABA's DES keys to SecretKeySpec or DESKeySpec instances.

Parameters:
key - the key
keySpec - the requested format in which the key material shall be returned
Returns:
s the underlying key specification (key material) in the requested format
Throws: InvalidKeySpecException
if the requested key specification is inappropriate for the given key, or the given key cannot be dealt with (e.g., the given key has an unrecognised format).
Overrides:
engineGetKeySpec in class SecretKeyFactorySpi
 o engineTranslateKey
 protected SecretKey engineTranslateKey(SecretKey key) throws InvalidKeyException
Translates a DES key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this key factory.

Parameters:
key - - the key whose provider is unknown or untrusted
Returns:
s the translated key
Throws: InvalidKeyException
if the given key cannot be processed by this key factory.
Overrides:
engineTranslateKey in class SecretKeyFactorySpi

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