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cryptix.jce.provider.key
Class SKIPJACKKeyGenerator  

java.lang.Object
  javax.crypto.KeyGeneratorSpi
      cryptix.jce.provider.key.RawKeyGenerator
          cryptix.jce.provider.key.SKIPJACKKeyGenerator

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public class SKIPJACKKeyGenerator

extends RawKeyGenerator

A key generator for SKIPJACK.

SKIPJACK keys have a fixed length of 80 bits.

Version:

$Revision: 1.6 $

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Constructor Summary

SKIPJACKKeyGenerator()

 

Method Summary
protected  javax.crypto.SecretKey	engineGenerateKey()           Generate a key, returning it as a javax.crypto.SecretKey.
protected  void	engineInit(java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)           Initialize this key generator with parameters and a source of randomness.
protected  void	engineInit(int keysize, java.security.SecureRandom random)           Initialize this key generator with a key size (in bits) and a source of randomness.
protected  void	engineInit(java.security.SecureRandom random)           Initialize this key generator with a source of randomness; the implementation should use reasonable default parameters (such as generated key size).
protected  byte[]	fixUp(byte[] key)           Fix up the generated and purely random bytes.
protected  boolean	isValidSize(int size)           SKIPJACK does 80-bit keys only.
protected  boolean	isWeak(byte[] key)           SKIPJACK doesn't have weak keys.
protected  int	strengthToBits(int strength)           Translates strength (complexity, 56 for DES) to bit length (64 for DES).

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

SKIPJACKKeyGenerator

public SKIPJACKKeyGenerator()

Method Detail

isWeak

protected boolean isWeak(byte[] key)

SKIPJACK doesn't have weak keys.

Specified by:

isWeak in class RawKeyGenerator

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isValidSize

protected boolean isValidSize(int size)

SKIPJACK does 80-bit keys only.

Specified by:

isValidSize in class RawKeyGenerator

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engineInit

protected void engineInit(java.security.SecureRandom random)

Description copied from class: javax.crypto.KeyGeneratorSpi

Initialize this key generator with a source of randomness; the implementation should use reasonable default parameters (such as generated key size).

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engineInit

protected void engineInit(java.security.spec.AlgorithmParameterSpec params,
                          java.security.SecureRandom random)
                   throws java.security.InvalidAlgorithmParameterException

Description copied from class: javax.crypto.KeyGeneratorSpi

Initialize this key generator with parameters and a source of randomness.

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engineInit

protected void engineInit(int keysize,
                          java.security.SecureRandom random)

Description copied from class: javax.crypto.KeyGeneratorSpi

Initialize this key generator with a key size (in bits) and a source of randomness.

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engineGenerateKey

protected javax.crypto.SecretKey engineGenerateKey()

Description copied from class: javax.crypto.KeyGeneratorSpi

Generate a key, returning it as a javax.crypto.SecretKey.

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strengthToBits

protected int strengthToBits(int strength)

Translates strength (complexity, 56 for DES) to bit length (64 for DES).

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fixUp

protected byte[] fixUp(byte[] key)

Fix up the generated and purely random bytes. For DES this would fix the parity.

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