/* *   File:  HushRandom.java * *   Extends the Random class, for better random numbers. * *   version 1.02 v1a *   Copyright 1998, 1999 by Hush Communications Corporation, BWI */package hushcode;import java.util.Random;import hushcode.HushSHA1;final class HushRandom extends Random{  byte[] randBytes = new byte[128];  public HushRandom(byte[] seed)  {    /*  seed should be strength/8 bytes long     */    enqueueBytes(seed);  }  public void nextBytes(byte[] bytes)  {    //System.out.println(bytes.length + " bytes requested);    int bytesGenerated = 0;    while (bytes.length - bytesGenerated > 10)    {      byte[] hashedBytes = new HushSHA1().SHA1Hash(randBytes);      //System.out.println("Hash: "+Conversions.bytesToHexString(hashedBytes));      System.arraycopy(hashedBytes,0,bytes,bytesGenerated,10);      enqueueBytes(hashedBytes,10,10);       bytesGenerated = bytesGenerated + 10;    }    byte[] hashedBytes = new HushSHA1().SHA1Hash(randBytes);    //System.out.println("Hash: "+Conversions.bytesToHexString(hashedBytes));    System.arraycopy(hashedBytes,0,bytes,bytesGenerated,bytes.length-bytesGenerated);    enqueueBytes(hashedBytes,bytes.length-bytesGenerated,20-(bytes.length-bytesGenerated));        //System.out.println("Returned value: "+Conversions.bytesToHexString(bytes));  }  public void enqueueBytes(byte[] passedBytes, int offset, int length)  {    byte[] bytes = new byte[length];    System.arraycopy(passedBytes,offset,bytes,0,length);    enqueueBytes(bytes);  }  public void enqueueBytes(byte[] bytes)  {    //System.out.println("Originally: "+Conversions.bytesToHexString(randBytes));    //System.out.println("Enqueueing: "+Conversions.bytesToHexString(bytes));    for (int n=127-bytes.length; n>=0; n--)    {      randBytes[n+bytes.length]=randBytes[n];    }    System.arraycopy(bytes,0,randBytes,0,bytes.length);    //System.out.println("Now: "+Conversions.bytesToHexString(randBytes));   }}