org.cumulus4j.crypto.internal.mac
Class MACCalculatorImpl

java.lang.Object
  org.cumulus4j.crypto.internal.mac.MACCalculatorImpl

All Implemented Interfaces:

Mac, MACCalculator

public class MACCalculatorImpl
extends Object
implements MACCalculator

Author:

Marco หงุ่ยตระกูล-Schulze - marco at nightlabs dot de

Constructor Summary

MACCalculatorImpl(Mac macEngine, int keySize, int ivSize)

Method Summary

byte[]	doFinal(byte[] in) Convenience method to process the complete input byte array at once.
int	doFinal(byte[] out, int outOff)
String	getAlgorithmName()
int	getIVSize() Get the required size of the IV (in bytes).
int	getKeySize() Get the required size of the key (in bytes).
int	getMacSize()
CipherParameters	getParameters()
void	init(CipherParameters params)
void	reset()
void	setAlgorithmName(String algorithmName)
void	update(byte in)
void	update(byte[] in, int inOff, int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

MACCalculatorImpl

public MACCalculatorImpl(Mac macEngine,
                         int keySize,
                         int ivSize)

Method Detail

init

public void init(CipherParameters params)
          throws IllegalArgumentException

Specified by:

init in interface Mac

Throws:

IllegalArgumentException

getParameters

public CipherParameters getParameters()

Specified by:

getParameters in interface MACCalculator

getKeySize

public int getKeySize()

Description copied from interface: MACCalculator

Get the required size of the key (in bytes).

Specified by:

getKeySize in interface MACCalculator

Returns:

the required size of the key (in bytes).

getIVSize

public int getIVSize()

Description copied from interface: MACCalculator

Get the required size of the IV (in bytes). If a MAC supports multiple sizes, this is the optimal (most secure) IV size. If a MAC supports no IV, this is 0.

Specified by:

getIVSize in interface MACCalculator

Returns:

the required size of the IV.

setAlgorithmName

public void setAlgorithmName(String algorithmName)

Specified by:

setAlgorithmName in interface MACCalculator

getAlgorithmName

public String getAlgorithmName()

Specified by:

getAlgorithmName in interface Mac

getMacSize

public int getMacSize()

Specified by:

getMacSize in interface Mac

update

public void update(byte in)
            throws IllegalStateException

Specified by:

update in interface Mac

Throws:

IllegalStateException

update

public void update(byte[] in,
                   int inOff,
                   int len)
            throws DataLengthException,
                   IllegalStateException

Specified by:

update in interface Mac

Throws:

DataLengthException

IllegalStateException

doFinal

public int doFinal(byte[] out,
                   int outOff)
            throws DataLengthException,
                   IllegalStateException

Specified by:

doFinal in interface Mac

Throws:

DataLengthException

IllegalStateException

doFinal

public byte[] doFinal(byte[] in)
               throws IllegalStateException

Description copied from interface: MACCalculator

Convenience method to process the complete input byte array at once.

Specified by:

doFinal in interface MACCalculator

Parameters:

in - the input to calculate a MAC for.

Returns:

the MAC.

Throws:

IllegalStateException - if the MACCalculator isn't initialised.

reset

public void reset()

Specified by:

reset in interface Mac