net.ninthtest.crypto.provider.helix

Class HelixKeyGenerator

java.lang.Object

javax.crypto.KeyGeneratorSpi

net.ninthtest.crypto.provider.helix.HelixKeyGenerator

public final class HelixKeyGenerator
extends KeyGeneratorSpi

This class generates secret (symmetric) keys for the Helix combined stream cipher and MAC function algorithm.

Version:

1.0

Author:

Matthew Zipay (mattz@ninthtest.net)

Constructor Summary

Constructors

Constructor and Description
HelixKeyGenerator() Creates a new HelixKeyGenerator using the default key size and the platform default SecureRandom implementation.

Method Summary

Modifier and Type	Method and Description
protected SecretKey	engineGenerateKey() Generates a secret key.
protected void	engineInit(AlgorithmParameterSpec params, SecureRandom random) Initializes the key generator with the specified parameter set and a user-provided source of randomness.
protected void	engineInit(int keySize, SecureRandom random) Initializes this key generator for a certain keysize, using the given source of randomness.
protected void	engineInit(SecureRandom random) Initializes the key generator.

Methods inherited from class java.lang.Object

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

Constructor Detail

HelixKeyGenerator

public HelixKeyGenerator()

Creates a new HelixKeyGenerator using the default key size and the platform default SecureRandom implementation.

This constructor also performs the provider self-integrity check.

Method Detail

engineInit

protected void engineInit(SecureRandom random)

Initializes the key generator.

Specified by:

engineInit in class KeyGeneratorSpi

Parameters:

random - the source of randomness for this generator

See Also:

KeyGeneratorSpi.engineInit(java.security.SecureRandom)

engineInit

protected void engineInit(int keySize,
                          SecureRandom random)

Initializes this key generator for a certain keysize, using the given source of randomness.

Specified by:

engineInit in class KeyGeneratorSpi

Parameters:

keySize - the size of the keys that this generator should generate, specified in number of bits (must be a multiple of eight)

random - the source of randomness for this generator

See Also:

KeyGeneratorSpi.engineInit(int, java.security.SecureRandom)

engineInit

protected void engineInit(AlgorithmParameterSpec params,
                          SecureRandom random)
                   throws InvalidAlgorithmParameterException

Initializes the key generator with the specified parameter set and a user-provided source of randomness.

The Helix key generator does not accept parameters; this method will throw an exception.

Specified by:

engineInit in class KeyGeneratorSpi

Parameters:

params - the key generation parameters

random - the source of randomness for this generator

Throws:

InvalidAlgorithmParameterException - if params is inappropriate for this key generator

See Also:

KeyGeneratorSpi.engineInit(java.security.spec.AlgorithmParameterSpec, java.security.SecureRandom)

engineGenerateKey

protected SecretKey engineGenerateKey()

Generates a secret key.

Specified by:

engineGenerateKey in class KeyGeneratorSpi

Returns:

a new, randomly-generated Helix secret key

See Also:

KeyGeneratorSpi.engineGenerateKey()