Тема: Защита сайтов от парсинга
Последнее время все больше сайтов переходят на защиту javascriptом от парсинга и это становится проблемой.
Для примера есть бесплатный хостиг, который представлен под разными названиями (похоже там просто арендуют уже готовые решения разные организации и предлагают совершенно идентичный бесплатный хостинг), но физически одни сервера, одно ПО, одна и защита.
Так вот например у меня есть такой запрос
http://smsbox.qlihost.ru/you/new/g2.php?v=CHdGju51-Rk, в браузере видим тестовый ответ, но если попробует считать средствами php возвращает ненужный javascript, с которым надо что-то делать.
+ открыть спойлер
<html><body><script type="text/javascript" src="/aes.js" ></script><script>function toNumbers(d){var e=[];d.replace(/(..)/g,function(d){e.push(parseInt(d,16))});return e}function toHex(){for(var d=[],d=1==arguments.length&&arguments[0].constructor==Array?arguments[0]:arguments,e="",f=0;f<d.length;f++)e+=(16>d[f]?"0":"")+d[f].toString(16);return e.toLowerCase()}var a=toNumbers("f655ba9d09a112d4968c63579db590b4"),b=toNumbers("98344c2eee86c3994890592585b49f80"),c=toNumbers("7911eb502bb09dd5dc9a3a65f304bd95");document.cookie="__test="+toHex(slowAES.decrypt(c,2,a,b))+"; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/"; location.href="http://smsbox.qlihost.ru/you/new/g2.php?v=CHdGju51-Rk&i=1";</script><noscript>This site requires Javascript to work, please enable Javascript in your browser or use a browser with Javascript support</noscript></body></html>файлик aes.js скачать не проблема
http://smsbox.qlihost.ru/aes.jsКстати этим можно проверять хостинг реальный тот самый бесплатный или это что-то другое.
Что я тут вижу? Устанавливается кук с именем
__test до 31-Dec-37 23:55:55 т.е. в нашем случае вечный.
цифры а,b,c неизменны (причем на разных сайтах этого хостинга они те же самые, и похоже не зависят от времени, вчера были те же)
Формула функции получения кука - slowAES.decrypt(c,2,a,b) то же неизменна.
В браузере я вижу такое значение __test=7b2145b094a3f1881cdc4d25d1072f10 При смене домена на другой бесплатный хостинг остается тот же самый кукис.
ту либо к ip привязка, либо вообще случайное число?
Если кому-то будет интересно поломать голову, вот ссылка того, что можно попробовать прочитать
http://smsbox.qlihost.ru/you/new/g2.php?v=CHdGju51-Rk Вот, функция кодирования кукиса (AES - это «симметричный блочный шифр» для шифрования текстов одобрено правительством США для секретной информации до «секретной» - и с длиной ключа 192 или 256, вплоть до «совершенно секретно»)
+ открыть спойлер
/*
* aes.js: implements AES - Advanced Encryption Standard
* from the SlowAES project, http://code.google.com/p/slowaes/
*
* Copyright (c) 2008 Josh Davis ( http://www.josh-davis.org ),
* Mark Percival ( http://mpercival.com ),
*
* Ported from C code written by Laurent Haan ( http://www.progressive-coding.com )
*
* Licensed under the Apache License, Version 2.0
* http://www.apache.org/licenses/
*/
var slowAES = {
/*
* START AES SECTION
*/
aes:{
// structure of valid key sizes
keySize:{
SIZE_128:16,
SIZE_192:24,
SIZE_256:32
},
// Rijndael S-box
sbox:[
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 ],
// Rijndael Inverted S-box
rsbox:
[ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d ],
/* rotate the word eight bits to the left */
rotate:function(word)
{
var c = word[0];
for (var i = 0; i < 3; i++)
word[i] = word[i+1];
word[3] = c;
return word;
},
// Rijndael Rcon
Rcon:[
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,
0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f,
0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d,
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab,
0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,
0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25,
0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01,
0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d,
0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa,
0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a,
0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02,
0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef,
0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94,
0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f,
0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5,
0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33,
0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb ],
G2X: [
0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16,
0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e,
0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, 0x40, 0x42, 0x44, 0x46,
0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e,
0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76,
0x78, 0x7a, 0x7c, 0x7e, 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e,
0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e, 0xa0, 0xa2, 0xa4, 0xa6,
0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe,
0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6,
0xd8, 0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee,
0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe, 0x1b, 0x19, 0x1f, 0x1d,
0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05,
0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d,
0x23, 0x21, 0x27, 0x25, 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55,
0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45, 0x7b, 0x79, 0x7f, 0x7d,
0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65,
0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d,
0x83, 0x81, 0x87, 0x85, 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5,
0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5, 0xdb, 0xd9, 0xdf, 0xdd,
0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5,
0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed,
0xe3, 0xe1, 0xe7, 0xe5
],
G3X: [
0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d,
0x14, 0x17, 0x12, 0x11, 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39,
0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21, 0x60, 0x63, 0x66, 0x65,
0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71,
0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d,
0x44, 0x47, 0x42, 0x41, 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9,
0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1, 0xf0, 0xf3, 0xf6, 0xf5,
0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1,
0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd,
0xb4, 0xb7, 0xb2, 0xb1, 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99,
0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81, 0x9b, 0x98, 0x9d, 0x9e,
0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a,
0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6,
0xbf, 0xbc, 0xb9, 0xba, 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2,
0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea, 0xcb, 0xc8, 0xcd, 0xce,
0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda,
0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46,
0x4f, 0x4c, 0x49, 0x4a, 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62,
0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a, 0x3b, 0x38, 0x3d, 0x3e,
0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a,
0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16,
0x1f, 0x1c, 0x19, 0x1a
],
G9X: [
0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53,
0x6c, 0x65, 0x7e, 0x77, 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf,
0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7, 0x3b, 0x32, 0x29, 0x20,
0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c,
0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8,
0xc7, 0xce, 0xd5, 0xdc, 0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49,
0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01, 0xe6, 0xef, 0xf4, 0xfd,
0xc2, 0xcb, 0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91,
0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72, 0x05, 0x0c, 0x17, 0x1e,
0x21, 0x28, 0x33, 0x3a, 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2,
0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa, 0xec, 0xe5, 0xfe, 0xf7,
0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b,
0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f,
0x10, 0x19, 0x02, 0x0b, 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8,
0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0, 0x47, 0x4e, 0x55, 0x5c,
0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30,
0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9,
0xf6, 0xff, 0xe4, 0xed, 0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35,
0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d, 0xa1, 0xa8, 0xb3, 0xba,
0x85, 0x8c, 0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6,
0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e, 0x79, 0x70, 0x6b, 0x62,
0x5d, 0x54, 0x4f, 0x46
],
GBX: [
0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45,
0x74, 0x7f, 0x62, 0x69, 0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81,
0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9, 0x7b, 0x70, 0x6d, 0x66,
0x57, 0x5c, 0x41, 0x4a, 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12,
0xcb, 0xc0, 0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa, 0x93, 0x98, 0x85, 0x8e,
0xbf, 0xb4, 0xa9, 0xa2, 0xf6, 0xfd, 0xe0, 0xeb, 0xda, 0xd1, 0xcc, 0xc7,
0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f, 0x46, 0x4d, 0x50, 0x5b,
0x6a, 0x61, 0x7c, 0x77, 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f,
0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc, 0xd5, 0xde, 0xc3, 0xc8,
0xf9, 0xf2, 0xef, 0xe4, 0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c,
0x65, 0x6e, 0x73, 0x78, 0x49, 0x42, 0x5f, 0x54, 0xf7, 0xfc, 0xe1, 0xea,
0xdb, 0xd0, 0xcd, 0xc6, 0xaf, 0xa4, 0xb9, 0xb2, 0x83, 0x88, 0x95, 0x9e,
0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76, 0x1f, 0x14, 0x09, 0x02,
0x33, 0x38, 0x25, 0x2e, 0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd,
0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5, 0x3c, 0x37, 0x2a, 0x21,
0x10, 0x1b, 0x06, 0x0d, 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55,
0x01, 0x0a, 0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30, 0x59, 0x52, 0x4f, 0x44,
0x75, 0x7e, 0x63, 0x68, 0xb1, 0xba, 0xa7, 0xac, 0x9d, 0x96, 0x8b, 0x80,
0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8, 0x7a, 0x71, 0x6c, 0x67,
0x56, 0x5d, 0x40, 0x4b, 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13,
0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb, 0x92, 0x99, 0x84, 0x8f,
0xbe, 0xb5, 0xa8, 0xa3
],
GDX: [
0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f,
0x5c, 0x51, 0x46, 0x4b, 0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3,
0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b, 0xbb, 0xb6, 0xa1, 0xac,
0x8f, 0x82, 0x95, 0x98, 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0,
0x6b, 0x66, 0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48, 0x03, 0x0e, 0x19, 0x14,
0x37, 0x3a, 0x2d, 0x20, 0x6d, 0x60, 0x77, 0x7a, 0x59, 0x54, 0x43, 0x4e,
0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26, 0xbd, 0xb0, 0xa7, 0xaa,
0x89, 0x84, 0x93, 0x9e, 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6,
0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5, 0xbe, 0xb3, 0xa4, 0xa9,
0x8a, 0x87, 0x90, 0x9d, 0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25,
0x6e, 0x63, 0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d, 0xda, 0xd7, 0xc0, 0xcd,
0xee, 0xe3, 0xf4, 0xf9, 0xb2, 0xbf, 0xa8, 0xa5, 0x86, 0x8b, 0x9c, 0x91,
0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29, 0x62, 0x6f, 0x78, 0x75,
0x56, 0x5b, 0x4c, 0x41, 0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42,
0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a, 0xb1, 0xbc, 0xab, 0xa6,
0x85, 0x88, 0x9f, 0x92, 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa,
0xb7, 0xba, 0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94, 0xdf, 0xd2, 0xc5, 0xc8,
0xeb, 0xe6, 0xf1, 0xfc, 0x67, 0x6a, 0x7d, 0x70, 0x53, 0x5e, 0x49, 0x44,
0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c, 0x0c, 0x01, 0x16, 0x1b,
0x38, 0x35, 0x22, 0x2f, 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47,
0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff, 0xb4, 0xb9, 0xae, 0xa3,
0x80, 0x8d, 0x9a, 0x97
],
GEX: [
0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62,
0x48, 0x46, 0x54, 0x5a, 0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca,
0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba, 0xdb, 0xd5, 0xc7, 0xc9,
0xe3, 0xed, 0xff, 0xf1, 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81,
0x3b, 0x35, 0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11, 0x4b, 0x45, 0x57, 0x59,
0x73, 0x7d, 0x6f, 0x61, 0xad, 0xa3, 0xb1, 0xbf, 0x95, 0x9b, 0x89, 0x87,
0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7, 0x4d, 0x43, 0x51, 0x5f,
0x75, 0x7b, 0x69, 0x67, 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17,
0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c, 0x06, 0x08, 0x1a, 0x14,
0x3e, 0x30, 0x22, 0x2c, 0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc,
0xe6, 0xe8, 0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc, 0x41, 0x4f, 0x5d, 0x53,
0x79, 0x77, 0x65, 0x6b, 0x31, 0x3f, 0x2d, 0x23, 0x09, 0x07, 0x15, 0x1b,
0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b, 0xd1, 0xdf, 0xcd, 0xc3,
0xe9, 0xe7, 0xf5, 0xfb, 0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0,
0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0, 0x7a, 0x74, 0x66, 0x68,
0x42, 0x4c, 0x5e, 0x50, 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20,
0xec, 0xe2, 0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6, 0x9c, 0x92, 0x80, 0x8e,
0xa4, 0xaa, 0xb8, 0xb6, 0x0c, 0x02, 0x10, 0x1e, 0x34, 0x3a, 0x28, 0x26,
0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56, 0x37, 0x39, 0x2b, 0x25,
0x0f, 0x01, 0x13, 0x1d, 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d,
0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd, 0xa7, 0xa9, 0xbb, 0xb5,
0x9f, 0x91, 0x83, 0x8d
],
// Key Schedule Core
core:function(word,iteration)
{
/* rotate the 32-bit word 8 bits to the left */
word = this.rotate(word);
/* apply S-Box substitution on all 4 parts of the 32-bit word */
for (var i = 0; i < 4; ++i)
word[i] = this.sbox[word[i]];
/* XOR the output of the rcon operation with i to the first part (leftmost) only */
word[0] = word[0]^this.Rcon[iteration];
return word;
},
/* Rijndael's key expansion
* expands an 128,192,256 key into an 176,208,240 bytes key
*
* expandedKey is a pointer to an char array of large enough size
* key is a pointer to a non-expanded key
*/
expandKey:function(key,size)
{
var expandedKeySize = (16*(this.numberOfRounds(size)+1));
/* current expanded keySize, in bytes */
var currentSize = 0;
var rconIteration = 1;
var t = []; // temporary 4-byte variable
var expandedKey = [];
for(var i = 0;i < expandedKeySize;i++)
expandedKey[i] = 0;
/* set the 16,24,32 bytes of the expanded key to the input key */
for (var j = 0; j < size; j++)
expandedKey[j] = key[j];
currentSize += size;
while (currentSize < expandedKeySize)
{
/* assign the previous 4 bytes to the temporary value t */
for (var k = 0; k < 4; k++)
t[k] = expandedKey[(currentSize - 4) + k];
/* every 16,24,32 bytes we apply the core schedule to t
* and increment rconIteration afterwards
*/
if(currentSize % size == 0)
t = this.core(t, rconIteration++);
/* For 256-bit keys, we add an extra sbox to the calculation */
if(size == this.keySize.SIZE_256 && ((currentSize % size) == 16))
for(var l = 0; l < 4; l++)
t[l] = this.sbox[t[l]];
/* We XOR t with the four-byte block 16,24,32 bytes before the new expanded key.
* This becomes the next four bytes in the expanded key.
*/
for(var m = 0; m < 4; m++) {
expandedKey[currentSize] = expandedKey[currentSize - size] ^ t[m];
currentSize++;
}
}
return expandedKey;
},
// Adds (XORs) the round key to the state
addRoundKey:function(state,roundKey)
{
for (var i = 0; i < 16; i++)
state[i] ^= roundKey[i];
return state;
},
// Creates a round key from the given expanded key and the
// position within the expanded key.
createRoundKey:function(expandedKey,roundKeyPointer)
{
var roundKey = [];
for (var i = 0; i < 4; i++)
for (var j = 0; j < 4; j++)
roundKey[j*4+i] = expandedKey[roundKeyPointer + i*4 + j];
return roundKey;
},
/* substitute all the values from the state with the value in the SBox
* using the state value as index for the SBox
*/
subBytes:function(state,isInv)
{
for (var i = 0; i < 16; i++)
state[i] = isInv?this.rsbox[state[i]]:this.sbox[state[i]];
return state;
},
/* iterate over the 4 rows and call shiftRow() with that row */
shiftRows:function(state,isInv)
{
for (var i = 0; i < 4; i++)
state = this.shiftRow(state,i*4, i,isInv);
return state;
},
/* each iteration shifts the row to the left by 1 */
shiftRow:function(state,statePointer,nbr,isInv)
{
for (var i = 0; i < nbr; i++)
{
if(isInv)
{
var tmp = state[statePointer + 3];
for (var j = 3; j > 0; j--)
state[statePointer + j] = state[statePointer + j-1];
state[statePointer] = tmp;
}
else
{
var tmp = state[statePointer];
for (var j = 0; j < 3; j++)
state[statePointer + j] = state[statePointer + j+1];
state[statePointer + 3] = tmp;
}
}
return state;
},
// galois multiplication of 8 bit characters a and b
galois_multiplication:function(a,b)
{
var p = 0;
for(var counter = 0; counter < 8; counter++)
{
if((b & 1) == 1)
p ^= a;
if(p > 0x100) p ^= 0x100;
var hi_bit_set = (a & 0x80); //keep p 8 bit
a <<= 1;
if(a > 0x100) a ^= 0x100; //keep a 8 bit
if(hi_bit_set == 0x80)
a ^= 0x1b;
if(a > 0x100) a ^= 0x100; //keep a 8 bit
b >>= 1;
if(b > 0x100) b ^= 0x100; //keep b 8 bit
}
return p;
},
// galois multipication of the 4x4 matrix
mixColumns:function(state,isInv)
{
var column = [];
/* iterate over the 4 columns */
for (var i = 0; i < 4; i++)
{
/* construct one column by iterating over the 4 rows */
for (var j = 0; j < 4; j++)
column[j] = state[(j*4)+i];
/* apply the mixColumn on one column */
column = this.mixColumn(column,isInv);
/* put the values back into the state */
for (var k = 0; k < 4; k++)
state[(k*4)+i] = column[k];
}
return state;
},
// galois multipication of 1 column of the 4x4 matrix
mixColumn:function(column,isInv)
{
var mult = [];
if(isInv)
mult = [14,9,13,11];
else
mult = [2,1,1,3];
var cpy = [];
for(var i = 0; i < 4; i++)
cpy[i] = column[i];
column[0] = this.galois_multiplication(cpy[0],mult[0]) ^
this.galois_multiplication(cpy[3],mult[1]) ^
this.galois_multiplication(cpy[2],mult[2]) ^
this.galois_multiplication(cpy[1],mult[3]);
column[1] = this.galois_multiplication(cpy[1],mult[0]) ^
this.galois_multiplication(cpy[0],mult[1]) ^
this.galois_multiplication(cpy[3],mult[2]) ^
this.galois_multiplication(cpy[2],mult[3]);
column[2] = this.galois_multiplication(cpy[2],mult[0]) ^
this.galois_multiplication(cpy[1],mult[1]) ^
this.galois_multiplication(cpy[0],mult[2]) ^
this.galois_multiplication(cpy[3],mult[3]);
column[3] = this.galois_multiplication(cpy[3],mult[0]) ^
this.galois_multiplication(cpy[2],mult[1]) ^
this.galois_multiplication(cpy[1],mult[2]) ^
this.galois_multiplication(cpy[0],mult[3]);
return column;
},
// applies the 4 operations of the forward round in sequence
round:function(state, roundKey)
{
state = this.subBytes(state,false);
state = this.shiftRows(state,false);
state = this.mixColumns(state,false);
state = this.addRoundKey(state, roundKey);
return state;
},
// applies the 4 operations of the inverse round in sequence
invRound:function(state,roundKey)
{
state = this.shiftRows(state,true);
state = this.subBytes(state,true);
state = this.addRoundKey(state, roundKey);
state = this.mixColumns(state,true);
return state;
},
/*
* Perform the initial operations, the standard round, and the final operations
* of the forward aes, creating a round key for each round
*/
main:function(state,expandedKey,nbrRounds)
{
state = this.addRoundKey(state, this.createRoundKey(expandedKey,0));
for (var i = 1; i < nbrRounds; i++)
state = this.round(state, this.createRoundKey(expandedKey,16*i));
state = this.subBytes(state,false);
state = this.shiftRows(state,false);
state = this.addRoundKey(state, this.createRoundKey(expandedKey,16*nbrRounds));
return state;
},
/*
* Perform the initial operations, the standard round, and the final operations
* of the inverse aes, creating a round key for each round
*/
invMain:function(state, expandedKey, nbrRounds)
{
state = this.addRoundKey(state, this.createRoundKey(expandedKey,16*nbrRounds));
for (var i = nbrRounds-1; i > 0; i--)
state = this.invRound(state, this.createRoundKey(expandedKey,16*i));
state = this.shiftRows(state,true);
state = this.subBytes(state,true);
state = this.addRoundKey(state, this.createRoundKey(expandedKey,0));
return state;
},
numberOfRounds:function(size)
{
var nbrRounds;
switch (size) /* set the number of rounds */
{
case this.keySize.SIZE_128:
nbrRounds = 10;
break;
case this.keySize.SIZE_192:
nbrRounds = 12;
break;
case this.keySize.SIZE_256:
nbrRounds = 14;
break;
default:
return null;
break;
}
return nbrRounds;
},
// encrypts a 128 bit input block against the given key of size specified
encrypt:function(input,key,size)
{
var output = [];
var block = []; /* the 128 bit block to encode */
var nbrRounds = this.numberOfRounds(size);
/* Set the block values, for the block:
* a0,0 a0,1 a0,2 a0,3
* a1,0 a1,1 a1,2 a1,3
* a2,0 a2,1 a2,2 a2,3
* a3,0 a3,1 a3,2 a3,3
* the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
*/
for (var i = 0; i < 4; i++) /* iterate over the columns */
for (var j = 0; j < 4; j++) /* iterate over the rows */
block[(i+(j*4))] = input[(i*4)+j];
/* expand the key into an 176, 208, 240 bytes key */
var expandedKey = this.expandKey(key, size); /* the expanded key */
/* encrypt the block using the expandedKey */
block = this.main(block, expandedKey, nbrRounds);
for (var k = 0; k < 4; k++) /* unmap the block again into the output */
for (var l = 0; l < 4; l++) /* iterate over the rows */
output[(k*4)+l] = block[(k+(l*4))];
return output;
},
// decrypts a 128 bit input block against the given key of size specified
decrypt:function(input, key, size)
{
var output = [];
var block = []; /* the 128 bit block to decode */
var nbrRounds = this.numberOfRounds(size);
/* Set the block values, for the block:
* a0,0 a0,1 a0,2 a0,3
* a1,0 a1,1 a1,2 a1,3
* a2,0 a2,1 a2,2 a2,3
* a3,0 a3,1 a3,2 a3,3
* the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
*/
for (var i = 0; i < 4; i++) /* iterate over the columns */
for (var j = 0; j < 4; j++) /* iterate over the rows */
block[(i+(j*4))] = input[(i*4)+j];
/* expand the key into an 176, 208, 240 bytes key */
var expandedKey = this.expandKey(key, size);
/* decrypt the block using the expandedKey */
block = this.invMain(block, expandedKey, nbrRounds);
for (var k = 0; k < 4; k++)/* unmap the block again into the output */
for (var l = 0; l < 4; l++)/* iterate over the rows */
output[(k*4)+l] = block[(k+(l*4))];
return output;
}
},
/*
* END AES SECTION
*/
/*
* START MODE OF OPERATION SECTION
*/
//structure of supported modes of operation
modeOfOperation:{
OFB:0,
CFB:1,
CBC:2
},
// get a 16 byte block (aes operates on 128bits)
getBlock: function(bytesIn,start,end,mode)
{
if(end - start > 16)
end = start + 16;
return bytesIn.slice(start, end);
},
/*
* Mode of Operation Encryption
* bytesIn - Input String as array of bytes
* mode - mode of type modeOfOperation
* key - a number array of length 'size'
* size - the bit length of the key
* iv - the 128 bit number array Initialization Vector
*/
encrypt: function (bytesIn, mode, key, iv)
{
var size = key.length;
if(iv.length%16)
{
throw 'iv length must be 128 bits.';
}
// the AES input/output
var byteArray = [];
var input = [];
var output = [];
var ciphertext = [];
var cipherOut = [];
// char firstRound
var firstRound = true;
if (mode == this.modeOfOperation.CBC)
this.padBytesIn(bytesIn);
if (bytesIn !== null)
{
for (var j = 0;j < Math.ceil(bytesIn.length/16); j++)
{
var start = j*16;
var end = j*16+16;
if(j*16+16 > bytesIn.length)
end = bytesIn.length;
byteArray = this.getBlock(bytesIn,start,end,mode);
if (mode == this.modeOfOperation.CFB)
{
if (firstRound)
{
output = this.aes.encrypt(iv, key, size);
firstRound = false;
}
else
output = this.aes.encrypt(input, key, size);
for (var i = 0; i < 16; i++)
ciphertext[i] = byteArray[i] ^ output[i];
for(var k = 0;k < end-start;k++)
cipherOut.push(ciphertext[k]);
input = ciphertext;
}
else if (mode == this.modeOfOperation.OFB)
{
if (firstRound)
{
output = this.aes.encrypt(iv, key, size);
firstRound = false;
}
else
output = this.aes.encrypt(input, key, size);
for (var i = 0; i < 16; i++)
ciphertext[i] = byteArray[i] ^ output[i];
for(var k = 0;k < end-start;k++)
cipherOut.push(ciphertext[k]);
input = output;
}
else if (mode == this.modeOfOperation.CBC)
{
for (var i = 0; i < 16; i++)
input[i] = byteArray[i] ^ ((firstRound) ? iv[i] : ciphertext[i]);
firstRound = false;
ciphertext = this.aes.encrypt(input, key, size);
// always 16 bytes because of the padding for CBC
for(var k = 0;k < 16;k++)
cipherOut.push(ciphertext[k]);
}
}
}
return cipherOut;
},
/*
* Mode of Operation Decryption
* cipherIn - Encrypted String as array of bytes
* originalsize - The unencrypted string length - required for CBC
* mode - mode of type modeOfOperation
* key - a number array of length 'size'
* size - the bit length of the key
* iv - the 128 bit number array Initialization Vector
*/
decrypt:function(cipherIn,mode,key,iv)
{
var size = key.length;
if(iv.length%16)
{
throw 'iv length must be 128 bits.';
}
// the AES input/output
var ciphertext = [];
var input = [];
var output = [];
var byteArray = [];
var bytesOut = [];
// char firstRound
var firstRound = true;
if (cipherIn !== null)
{
for (var j = 0;j < Math.ceil(cipherIn.length/16); j++)
{
var start = j*16;
var end = j*16+16;
if(j*16+16 > cipherIn.length)
end = cipherIn.length;
ciphertext = this.getBlock(cipherIn,start,end,mode);
if (mode == this.modeOfOperation.CFB)
{
if (firstRound)
{
output = this.aes.encrypt(iv, key, size);
firstRound = false;
}
else
output = this.aes.encrypt(input, key, size);
for (i = 0; i < 16; i++)
byteArray[i] = output[i] ^ ciphertext[i];
for(var k = 0;k < end-start;k++)
bytesOut.push(byteArray[k]);
input = ciphertext;
}
else if (mode == this.modeOfOperation.OFB)
{
if (firstRound)
{
output = this.aes.encrypt(iv, key, size);
firstRound = false;
}
else
output = this.aes.encrypt(input, key, size);
for (i = 0; i < 16; i++)
byteArray[i] = output[i] ^ ciphertext[i];
for(var k = 0;k < end-start;k++)
bytesOut.push(byteArray[k]);
input = output;
}
else if(mode == this.modeOfOperation.CBC)
{
output = this.aes.decrypt(ciphertext, key, size);
for (i = 0; i < 16; i++)
byteArray[i] = ((firstRound) ? iv[i] : input[i]) ^ output[i];
firstRound = false;
for(var k = 0;k < end-start;k++)
bytesOut.push(byteArray[k]);
input = ciphertext;
}
}
if(mode == this.modeOfOperation.CBC)
this.unpadBytesOut(bytesOut);
}
return bytesOut;
},
padBytesIn: function(data) {
var len = data.length;
var padByte = 16 - (len % 16);
for (var i = 0; i < padByte; i++) {
data.push(padByte);
}
},
unpadBytesOut: function(data) {
var padCount = 0;
var padByte = -1;
var blockSize = 16;
if (data.length > 16) {
for (var i = data.length - 1; i >= data.length-1 - blockSize; i--) {
if (data[i] <= blockSize) {
if (padByte == -1)
padByte = data[i];
if (data[i] != padByte) {
padCount = 0;
break;
}
padCount++;
} else
break;
if (padCount == padByte)
break;
}
if (padCount > 0)
data.splice(data.length - padCount, padCount);
}
}
/*
* END MODE OF OPERATION SECTION
*/
};