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.
Summary
Inherited methods |
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From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
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boolean
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equals(Object obj)
Indicates whether some other object is "equal to" this one.
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void
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finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
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final
Class<?>
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getClass()
Returns the runtime class of this Object.
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int
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hashCode()
Returns a hash code value for the object.
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final
void
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notify()
Wakes up a single thread that is waiting on this object's
monitor.
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final
void
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notifyAll()
Wakes up all threads that are waiting on this object's monitor.
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String
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toString()
Returns a string representation of the object.
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final
void
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wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
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final
void
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wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
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final
void
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wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
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Public constructors
SecretKeyFactorySpi
public SecretKeyFactorySpi ()
Protected methods
engineGenerateSecret
protected abstract SecretKey engineGenerateSecret (KeySpec keySpec)
Generates a SecretKey object from the
provided key specification (key material).
| Parameters |
|---|
keySpec |
KeySpec: the specification (key material) of 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)
Returns a specification (key material) of the given key
object in the requested format.
| Parameters |
|---|
key |
SecretKey: the key |
keySpec |
Class: the requested format in which the key material shall be
returned |
| Returns |
|---|
KeySpec |
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)
Translates a key object, whose provider may be unknown or
potentially untrusted, into a corresponding key object of this
secret-key factory.
| Parameters |
|---|
key |
SecretKey: the key whose provider is unknown or untrusted |
