cryptix.provider.key

Class RC4KeyGenerator

java.lang.Object

xjava.security.KeyGenerator

cryptix.provider.key.RawKeyGenerator

cryptix.provider.key.RC4KeyGenerator

All Implemented Interfaces:

java.lang.Cloneable, ExtendedKeyGenerator, Parameterized

public class RC4KeyGenerator
extends RawKeyGenerator

A variable-length key generator for RC4.

This implementation allows keys to have a length of between 40 and 1024 bits. The default length is 128 bits.

References:

1. Andrew Roos <andrewr@vironix.co.za> (Vironix Software Laboratories), A Class of Weak Keys in the RC4 Stream Cipher, Preliminary draft posted to sci.crypt, 4th November 1997.

Copyright © 1997 Systemics Ltd on behalf of the Cryptix Development Team.
All rights reserved.

$Revision: 1.2 $

Since:

Cryptix 2.2.2

Author:

David Hopwood

Constructor Summary

Constructors

Constructor and Description
RC4KeyGenerator()

Method Summary

Modifier and Type	Method and Description
protected boolean	isWeak(byte[] key) Returns true iff key is a weak RC4 key, as described in Andrew Roos' paper.

Methods inherited from class cryptix.provider.key.RawKeyGenerator

engineGenerateKey, generateKey, generateKey, getDefaultKeyLength, getMaximumKeyLength, getMinimumKeyLength, initialize, initialize, isValidKeyLength, isWeakAllowed, setWeakAllowed

Methods inherited from class xjava.security.KeyGenerator

clone, engineGetParameter, engineSetParameter, getAlgorithm, getAlgorithms, getAlgorithms, getInstance, getInstance, getParameter, setParameter, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

RC4KeyGenerator

public RC4KeyGenerator()

Method Detail

isWeak

protected boolean isWeak(byte[] key)

Returns true iff key is a weak RC4 key, as described in Andrew Roos' paper.

Overrides:

isWeak in class RawKeyGenerator