MacSpi - Android SDK

Summary: Ctors | Methods | Protected Methods | Inherited Methods | [Expand All]

Added in API level 1

public abstract class

MacSpi

extends Object

java.lang.Object
↳	javax.crypto.MacSpi

Class Overview

The Service-Provider Interface (SPI) definition for the Mac class.

Summary

Public Constructors
	MacSpi() Creates a new `MacSpi` instance.

Public Methods
Object	clone() Clones this `MacSpi` instance.

Protected Methods
abstract byte[]	engineDoFinal() Computes the digest of this MAC based on the data previously specified in `engineUpdate(byte)` calls.
abstract int	engineGetMacLength() Returns the length of this MAC (in bytes).
abstract void	engineInit(Key key, AlgorithmParameterSpec params) Initializes this `MacSpi` instance with the specified key and algorithm parameters.
abstract void	engineReset() Resets this `MacSpi` instance to its initial state.
abstract void	engineUpdate(byte[] input, int offset, int len) Updates this `MacSpi` instance with the data from the specified buffer `input` from the specified `offset` and length `len`.
abstract void	engineUpdate(byte input) Updates this `MacSpi` instance with the specified byte.
void	engineUpdate(ByteBuffer input) Updates this `MacSpi` instance with the data from the specified buffer, starting at `position()`, including the next `remaining()` bytes.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public MacSpi ()

Added in API level 1

Creates a new MacSpi instance.

Public Methods

public Object clone ()

Added in API level 1

Clones this MacSpi instance.

Returns

the cloned instance.

Throws

CloneNotSupportedException	if cloning is not supported.

Protected Methods

protected abstract byte[] engineDoFinal ()

Added in API level 1

Computes the digest of this MAC based on the data previously specified in engineUpdate(byte) calls.

This MacSpi instance is reverted to its initial state and can be used to start the next MAC computation with the same parameters or initialized with different parameters.

Returns

the generated digest.

protected abstract int engineGetMacLength ()

Added in API level 1

Returns the length of this MAC (in bytes).

Returns

the length of this MAC (in bytes).

protected abstract void engineInit (Key key, AlgorithmParameterSpec params)

Added in API level 1

Initializes this MacSpi instance with the specified key and algorithm parameters.

Parameters

key	the key to initialize this algorithm.
params	the parameters for this algorithm.

Throws

InvalidKeyException	if the specified key cannot be used to initialize this algorithm, or it is `null`.
InvalidAlgorithmParameterException	if the specified parameters cannot be used to initialize this algorithm.

protected abstract void engineReset ()

Added in API level 1

Resets this MacSpi instance to its initial state.

This MacSpi instance is reverted to its initial state and can be used to start the next MAC computation with the same parameters or initialized with different parameters.

protected abstract void engineUpdate (byte[] input, int offset, int len)

Added in API level 1

Updates this MacSpi instance with the data from the specified buffer input from the specified offset and length len.

Parameters

input	the buffer.
offset	the offset in the buffer.
len	the length of the data in the buffer.

protected abstract void engineUpdate (byte input)

Added in API level 1

Updates this MacSpi instance with the specified byte.

Parameters

input	the byte.

protected void engineUpdate (ByteBuffer input)

Added in API level 1

Updates this MacSpi instance with the data from the specified buffer, starting at position(), including the next remaining() bytes.

Parameters

input	the buffer.

Results

Interfaces

Classes

Exceptions

MacSpi

Class Overview

See Also

Summary

Public Constructors

public MacSpi ()

Public Methods

public Object clone ()

Returns

Throws

Protected Methods

protected abstract byte[] engineDoFinal ()

Returns

protected abstract int engineGetMacLength ()

Returns

protected abstract void engineInit (Key key, AlgorithmParameterSpec params)

Parameters

Throws

protected abstract void engineReset ()

protected abstract void engineUpdate (byte[] input, int offset, int len)

Parameters

protected abstract void engineUpdate (byte input)

Parameters

protected void engineUpdate (ByteBuffer input)

Parameters