de.flexiprovider.core.mac
Class TwoTrackMacKeyGenerator

java.lang.Object
  |
  +--javax.crypto.KeyGeneratorSpi
        |
        +--de.flexiprovider.api.keys.SecretKeyGenerator
              |
              +--de.flexiprovider.core.mac.TwoTrackMacKeyGenerator

public class TwoTrackMacKeyGenerator

extends SecretKeyGenerator

This class is used to generate keys for the Message Authentication Code TwoTrackMac. The TwoTrackMac key size is 20 bytes (160 bits).

Author:

Paul Nguentcheu

Field Summary

static int

TTMAC_KEY_SIZE The TwoTrackMac key size (20 bytes)

Constructor Summary

TwoTrackMacKeyGenerator()

Method Summary

SecretKey	generateKey() Generate a TwoTrackMac key.
void	init(AlgorithmParameterSpec params, SecureRandom random) Initialize the key generator.
void	init(int keySize, SecureRandom random) Initialize the key generator.
void	init(SecureRandom random) Initialize the key generator with a source of randomness.

Methods inherited from class de.flexiprovider.api.keys.SecretKeyGenerator

engineGenerateKey, engineInit, engineInit, engineInit, init, init, init

Methods inherited from class java.lang.Object

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

Field Detail

TTMAC_KEY_SIZE

public static final int TTMAC_KEY_SIZE

The TwoTrackMac key size (20 bytes)

Constructor Detail

TwoTrackMacKeyGenerator

public TwoTrackMacKeyGenerator()

Method Detail

init

public void init(AlgorithmParameterSpec params,
                 SecureRandom random)

Initialize the key generator. Since TwoTrackMac keys are of a fixed size and do not require any parameters, this method only sets the source of randomness.

Overrides:

init in class SecretKeyGenerator

Parameters:

params - the parameters (not used)

random - the source of randomness

init

public void init(int keySize,
                 SecureRandom random)

Initialize the key generator. Since TwoTrackMac keys are of a fixed size, this method only sets the source of randomness.

Overrides:

init in class SecretKeyGenerator

Parameters:

keySize - the key size (not used)

random - the source of randomness for this key generator

init

public void init(SecureRandom random)

Initialize the key generator with a source of randomness.

Overrides:

init in class SecretKeyGenerator

Parameters:

random - the source of randomness

generateKey

public SecretKey generateKey()

Generate a TwoTrackMac key.

Overrides:

generateKey in class SecretKeyGenerator

Returns:

the generated TwoTrackMacKey