de.flexiprovider.core.shacal
Class ShacalKeyGenerator

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

public class ShacalKeyGenerator

extends SecretKeyGenerator

This class is used to generate keys for the Shacal block cipher. Values for the key are 128, 192, 256, 320, 384, and 448 bits, with the default being 128 bits.

Author:

Paul Nguentcheu

Constructor Summary

ShacalKeyGenerator()

Method Summary

SecretKey	generateKey() Generate a Shacal key.
void	init(AlgorithmParameterSpec params, SecureRandom random) Initialize the key generator with the given parameters (which have to be an instance of ShacalKeyGenParameterSpec) and a source of randomness.
void	init(int keySize, SecureRandom random) Initialize the key generator for a certain key size, using the given source of randomness.
void	init(SecureRandom random) Initialize the key generator with the given 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

Constructor Detail

ShacalKeyGenerator

public ShacalKeyGenerator()

Method Detail

init

public void init(AlgorithmParameterSpec params,
                 SecureRandom random)
          throws InvalidAlgorithmParameterException

Initialize the key generator with the given parameters (which have to be an instance of ShacalKeyGenParameterSpec) and a source of randomness. If the parameters are null, the default parameters are used.

Overrides:

init in class SecretKeyGenerator

Parameters:

params - the parameters

random - the source of randomness

Throws:

InvalidAlgorithmParameterException - if the parameters are not an instance of ShacalKeyGenParameterSpec.

init

public void init(int keySize,
                 SecureRandom random)

Initialize the key generator for a certain key size, using the given source of randomness. If the key size is invalid, the default key length is chosen (see ShacalKeyGenParameterSpec).

Overrides:

init in class SecretKeyGenerator

Parameters:

keySize - the key size (128, 192, 256, 320, 384, or 448 bits)

random - the source of randomness

init

public void init(SecureRandom random)

Initialize the key generator with the given source of randomness. The default key size is chosen (see ShacalKeyGenParameterSpec).

Overrides:

init in class SecretKeyGenerator

Parameters:

random - the source of randomness

generateKey

public SecretKey generateKey()

Generate a Shacal key.

Overrides:

generateKey in class SecretKeyGenerator

Returns:

the generated ShacalKey