com.opensymphony.module.random

Class Yarrow

java.lang.Object

java.util.Random

com.opensymphony.module.random.Yarrow

All Implemented Interfaces:

java.io.Serializable

public final class Yarrow
extends java.util.Random

This class represents a Pseudo Random Number Generator (PRNG) as specified by the Yarrow documentation (www.counterpane.com/yarrow) Most of the code in this class is based on FreeNet's Yarrow implementation.

Author:

Scott G. Miller , Victor Salaman

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Yarrow.EntropySource

Field Summary

Fields

Modifier and Type	Field and Description
byte[]	ZERO_ARRAY

Constructor Summary

Constructors

Constructor and Description
Yarrow()

Method Summary

Methods

Modifier and Type	Method and Description
void	acceptEntropy(Yarrow.EntropySource source, long data, int entropyGuess)
void	acceptTimerEntropy(Yarrow.EntropySource timer)
void	makeKey(byte[] entropy, byte[] key, int offset, int len)
protected int	next(int bits)
void	wipe(byte[] data)

Methods inherited from class java.util.Random

nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong, setSeed

Methods inherited from class java.lang.Object

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

Field Detail

ZERO_ARRAY

public byte[] ZERO_ARRAY

Constructor Detail

Yarrow

public Yarrow()

Method Detail

acceptEntropy

public void acceptEntropy(Yarrow.EntropySource source,
                 long data,
                 int entropyGuess)

acceptTimerEntropy

public void acceptTimerEntropy(Yarrow.EntropySource timer)

makeKey

public void makeKey(byte[] entropy,
           byte[] key,
           int offset,
           int len)

wipe

public void wipe(byte[] data)

next

protected int next(int bits)

Overrides:

next in class java.util.Random