hushrandom.java

一个木马程序源码

/*
 *   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)); 
  }
}