// Downloaded from http://www-cs-students.stanford.edu/~tjw/jsbn/ by Jeremy White on 6/1/2012
  
  /*
   * Copyright (c) 2003-2005  Tom Wu
   * All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
   * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
   * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
   *
   * IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
   * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
   * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
   * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
   * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   *
   * In addition, the following condition applies:
   *
   * All redistributions must retain an intact copy of this copyright notice
   * and disclaimer.
   */
  
  
  // prng4.js - uses Arcfour as a PRNG
  
  function Arcfour() {
    this.i = 0;
    this.j = 0;
    this.S = new Array();
  }
  
  // Initialize arcfour context from key, an array of ints, each from [0..255]
  function ARC4init(key) {
    var i, j, t;
    for(i = 0; i < 256; ++i)
      this.S[i] = i;
    j = 0;
    for(i = 0; i < 256; ++i) {
      j = (j + this.S[i] + key[i % key.length]) & 255;
      t = this.S[i];
      this.S[i] = this.S[j];
      this.S[j] = t;
    }
    this.i = 0;
    this.j = 0;
  }
  
  function ARC4next() {
    var t;
    this.i = (this.i + 1) & 255;
    this.j = (this.j + this.S[this.i]) & 255;
    t = this.S[this.i];
    this.S[this.i] = this.S[this.j];
    this.S[this.j] = t;
    return this.S[(t + this.S[this.i]) & 255];
  }
  
  Arcfour.prototype.init = ARC4init;
  Arcfour.prototype.next = ARC4next;
  
  // Plug in your RNG constructor here
  function prng_newstate() {
    return new Arcfour();
  }
  
  // Pool size must be a multiple of 4 and greater than 32.
  // An array of bytes the size of the pool will be passed to init()
  var rng_psize = 256;