com.microej.crypto.internal.mac

Class AbstractMacSpi

java.lang.Object

javax.crypto.MacSpi

com.microej.crypto.internal.mac.AbstractMacSpi

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

NativeMacSpi

public abstract class AbstractMacSpi
extends MacSpi
implements Cloneable

Method Summary

Modifier and Type	Method and Description
protected byte[]	engineDoFinal() Completes the MAC computation and resets the MAC for further use, maintaining the secret key that the MAC was initialized with.
protected int	engineGetMacLength() Returns the length of the MAC in bytes.
protected void	engineInit(Key key, AlgorithmParameterSpec params) Initializes the MAC with the given (secret) key and algorithm parameters.
protected void	engineReset() Resets the MAC for further use, maintaining the secret key that the MAC was initialized with.
protected void	engineUpdate(byte b) Processes the given byte.
protected void	engineUpdate(byte[] b, int ofs, int len) Processes the first len bytes in input, starting at offset inclusive.

Methods inherited from class javax.crypto.MacSpi

clone

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

engineDoFinal

protected final byte[] engineDoFinal()

Description copied from class: MacSpi

Completes the MAC computation and resets the MAC for further use, maintaining the secret key that the MAC was initialized with.

Specified by:

engineDoFinal in class MacSpi

Returns:

the MAC result.

engineGetMacLength

protected final int engineGetMacLength()

Description copied from class: MacSpi

Returns the length of the MAC in bytes.

Specified by:

engineGetMacLength in class MacSpi

Returns:

the MAC length in bytes.

engineInit

protected void engineInit(Key key,
                          AlgorithmParameterSpec params)
                   throws InvalidKeyException,
                          InvalidAlgorithmParameterException

Description copied from class: MacSpi

Initializes the MAC with the given (secret) key and algorithm parameters.

Specified by:

engineInit in class MacSpi

Parameters:

key - the (secret) key.

params - the algorithm parameters.

Throws:

InvalidKeyException - if the given key is inappropriate for initializing this MAC.

InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this MAC.

engineReset

protected void engineReset()

Description copied from class: MacSpi

Resets the MAC for further use, maintaining the secret key that the MAC was initialized with.

Specified by:

engineReset in class MacSpi

engineUpdate

protected final void engineUpdate(byte b)

Description copied from class: MacSpi

Processes the given byte.

Specified by:

engineUpdate in class MacSpi

Parameters:

b - the input byte to be processed.

engineUpdate

protected final void engineUpdate(byte[] b,
                                  int ofs,
                                  int len)

Description copied from class: MacSpi

Processes the first len bytes in input, starting at offset inclusive.

Specified by:

engineUpdate in class MacSpi

Parameters:

b - the input buffer.

ofs - the offset in input where the input starts.

len - the number of bytes to process.