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javax.crypto
class SecretKeyFactorySpi
public abstract class SecretKeyFactorySpi
extends 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 DES secret-key factory supplied by the "SunJCE" provider
supports DESKeySpec
as a transparent representation of DES
keys, and that provider's secret-key factory for Triple DES keys supports
DESedeKeySpec
as a transparent representation of Triple DES
keys.
Method Summary |
protected abstract SecretKey |
Generates a SecretKey object from the
provided key specification (key material).
|
protected abstract KeySpec |
Returns a specification (key material) of the given key
object in the requested format.
|
protected abstract SecretKey |
Translates a key object, whose provider may be unknown or
potentially untrusted, into a corresponding key object of this
secret-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(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 abstract 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:
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 abstract 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:
- the translated key
- Throws:
InvalidKeyException
- if the given key cannot be processed
by this secret-key factory.
This documentation differs from the official API.
Jadeite adds
extra features to the API including:
variable font sizes,
constructions examples,
placeholders for classes and methods, and auto-generated “See Also” links.
Additionally it
is missing some items found in standard Javadoc documentation, including:
generics type information,
“Deprecated” tags and comments,
“See Also” links,
along with other minor differences.
Please send any questions or feedback to
bam@cs.cmu.edu.
This page displays the
Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
The official Sun™ documentation can be found here at
http://java.sun.com/javase/6/docs/api/.