KeyFactorySpi
public
abstract
class
KeyFactorySpi
extends Object
| java.lang.Object | |
| ↳ | java.security.KeyFactorySpi |
This class defines the Service Provider Interface (SPI)
for the KeyFactory class.
All the abstract methods in this class must be implemented by each
cryptographic service provider who wishes to supply the implementation
of a key factory for a particular algorithm.
Key factories are used to convert keys (opaque
cryptographic keys of type Key) into key specifications
(transparent representations of the underlying key material), and vice
versa.
Key factories are bi-directional. That is, they allow you to build an opaque key object from a given key specification (key material), or to retrieve the underlying key material of a key object in a suitable format.
Multiple compatible key specifications may exist for the same key.
For example, a DSA public key may be specified using
DSAPublicKeySpec or
X509EncodedKeySpec. A key factory can be used to translate
between compatible key specifications.
A provider should document all the key specifications supported by its key factory.
Summary
Public constructors | |
|---|---|
KeyFactorySpi()
|
|
Protected methods | |
|---|---|
abstract
PrivateKey
|
engineGeneratePrivate(KeySpec keySpec)
Generates a private key object from the provided key specification (key material). |
abstract
PublicKey
|
engineGeneratePublic(KeySpec keySpec)
Generates a public key object from the provided key specification (key material). |
abstract
<T extends KeySpec>
T
|
engineGetKeySpec(Key key, Class<T> keySpec)
Returns a specification (key material) of the given key object. |
abstract
Key
|
engineTranslateKey(Key key)
Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this key factory. |
Inherited methods | |
|---|---|