/*(c) 2006 - 2008 AllenPort Co. All Rights Reserved. All versions of this code, including the source and executable versions, constitute the intellectual property of AllenPort Co., which expressly reserves any and all U.S. and foreign rights and benefits to the code under copyright, trade secret and any other intellectual property law or international treaty whatsoever. Use of the code is subject to the terms and conditions of a separate written license agreement, and the code shall not be reproduced, modified, distributed or otherwise used in any form or manner whatsoever without obtaining the prior written permission of AllenPort Co. Any unauthorized reproduction or distribution of the code, or any portion of it, may result in civil and criminal penalties and be prosecuted to the fullest extent of the law.*/ // Random number generator - requires a PRNG backend, e.g. prng4.js // For best results, put code like // // in your main HTML document. var rng_state; var rng_pool; var rng_pptr; // Mix in a 32-bit integer into the pool function rng_seed_int(x) { rng_pool[rng_pptr++] ^= x & 255; rng_pool[rng_pptr++] ^= (x >> 8) & 255; rng_pool[rng_pptr++] ^= (x >> 16) & 255; rng_pool[rng_pptr++] ^= (x >> 24) & 255; if(rng_pptr >= rng_psize) rng_pptr -= rng_psize; } // Mix in the current time (w/milliseconds) into the pool function rng_seed_time() { rng_seed_int(new Date().getTime()); } // Initialize the pool with junk if needed. if(rng_pool == null) { rng_pool = new Array(); rng_pptr = 0; var t; if(navigator.appName == "Netscape" && navigator.appVersion < "5" && window.crypto) { // Extract entropy (256 bits) from NS4 RNG if available var z = window.crypto.random(32); for(t = 0; t < z.length; ++t) rng_pool[rng_pptr++] = z.charCodeAt(t) & 255; } while(rng_pptr < rng_psize) { // extract some randomness from Math.random() t = Math.floor(65536 * Math.random()); rng_pool[rng_pptr++] = t >>> 8; rng_pool[rng_pptr++] = t & 255; } rng_pptr = 0; rng_seed_time(); //rng_seed_int(window.screenX); //rng_seed_int(window.screenY); } function rng_get_byte() { if(rng_state == null) { rng_seed_time(); rng_state = prng_newstate(); rng_state.init(rng_pool); for(rng_pptr = 0; rng_pptr < rng_pool.length; ++rng_pptr) rng_pool[rng_pptr] = 0; rng_pptr = 0; //rng_pool = null; } // TODO: allow reseeding after first request return rng_state.next(); } function rng_get_bytes(ba) { var i; for(i = 0; i < ba.length; ++i) ba[i] = rng_get_byte(); } function SecureRandom() {} SecureRandom.prototype.nextBytes = rng_get_bytes;