mirror of
https://github.com/retspen/webvirtcloud
synced 2024-12-25 15:45:23 +00:00
84 lines
2.5 KiB
JavaScript
Executable file
84 lines
2.5 KiB
JavaScript
Executable file
// 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;
|
|
|
|
export {
|
|
prng_newstate,
|
|
rng_psize,
|
|
};
|