Class javax.crypto.SecretKeyFactorySpi
java.lang.Object
|
+----javax.crypto.SecretKeyFactorySpi
- public abstract class SecretKeyFactorySpi
- extends java.lang.Object
This class defines the Service Provider Interface (SPI)
for the SecretKeyFactory
class.
All the abstract methods in this class must be implemented by each
cryptographic service provider who wishes to supply the implementation
of a secret-key factory for a particular algorithm.
A provider should document all the key specifications supported by its
secret key factory.
For example, the Sun provider SecretKeyFactory
for DES keys
supports DESKeySpec
as a transparent representation of DES
keys, and the SecretKeyFactory
for Triple DES keys supports
DESedeKeySpec
as a transparent representation of Triple DES
keys.
- See Also:
- SecretKey, java.security.Key, java.security.KeyFactory, java.security.spec.KeySpec, DESKeySpec, DESedeKeySpec
Method Summary
|
SecretKey
|
engineGenerateSecret(java.security.spec.KeySpec keySpec)
Generates a SecretKey object from the
provided key specification (key material).
|
java.security.spec.KeySpec
|
engineGetKeySpec(SecretKey key,
java.lang.Class keySpec)
Returns a specification (key material) of the given key
object in the requested format.
|
SecretKey
|
engineTranslateKey(SecretKey key)
Translates a key object, whose provider may be unknown or
potentially untrusted, into a corresponding key object of this key
factory.
|
Methods inherited from class java.lang.Object
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SecretKeyFactorySpi
public SecretKeyFactorySpi()
engineGenerateSecret
protected abstract SecretKey engineGenerateSecret(java.security.spec.KeySpec keySpec) throws java.security.spec.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:
- java.security.spec.InvalidKeySpecException - if the given key specification
is inappropriate for this key factory to produce a secret key.
engineGetKeySpec
protected abstract java.security.spec.KeySpec engineGetKeySpec(SecretKey key,
java.lang.Class keySpec) throws java.security.spec.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:
- java.security.spec.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 unrecognized format).
engineTranslateKey
protected abstract SecretKey engineTranslateKey(SecretKey key) throws java.security.InvalidKeyException
- Translates a 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:
- the translated key
- Throws:
- java.security.InvalidKeyException - if the given key cannot be processed
by this key factory.