com.sun.squawk.security.signing
Class PseudoRand

java.lang.Object
  com.sun.squawk.security.signing.PseudoRand

public final class PseudoRand
extends Object

Implements a pseudo random number generator.

Constructor Summary

PseudoRand()
Constructor for random data.

Method Summary

void	generateData(byte[] b, int off, int len) This does a reasonable job of producing unpredictable random data by using a one way hash as a mixing function and the current time in milliseconds as a source of entropy.
void	setSeed(byte[] b, int off, int len) Set the random number seed.

Methods inherited from class java.lang.Object

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

Constructor Detail

PseudoRand

public PseudoRand()
           throws CryptoException

Constructor for random data.

Throws:

CryptoException

Method Detail

generateData

public void generateData(byte[] b,
                         int off,
                         int len)

This does a reasonable job of producing unpredictable random data by using a one way hash as a mixing function and the current time in milliseconds as a source of entropy.

Parameters:

b - buffer of input data

off - offset into the provided buffer

len - length of the data to be processed

setSeed

public void setSeed(byte[] b,
                    int off,
                    int len)

Set the random number seed.

Parameters:

b - initial data to use as the seed

off - offset into the provided buffer

len - length of the data to be used