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secretfile.html
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secretfile.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script type="text/javascript" language="javascript" >
// <!-- protect script
// TODO
// - better edit text box
// - load/save to remoteStorage
// - load/save to google drive
var _POSid = "POS_" + new Date().getTime();
var _appname = "secrets";
function hideEl(divid) {
let x = document.getElementById(divid);
if (x !== null) {
x.style.display = "none";
}
}
function showEl(divid) {
let x = document.getElementById(divid);
if (x !== null) {
x.style.display = "block";
}
}
function popup(msg) {
// modal popup dialog with message, OK button to dismiss
window.alert(msg);
}
function yesno(msg) {
return window.confirm(msg);
}
function init() {
// called at load time
if (!test_crypto()) {
popup("problem with the crypto...");
}
document.getElementById("userName").value = "";
document.getElementById("passPhrase").value = "";
document.getElementById("docURL").value = "file:";
document.getElementById("fileEditor").value = "";
// show management div
showEl("management");
}
function setFileInfo(lastSaveTS, lastEditedBy, lastEditedOn) {
document.getElementById("lastSaveTS").innerHTML = lastSaveTS;
document.getElementById("lastEditedBy").innerHTML = lastEditedBy;
document.getElementById("lastEditedOn").innerHTML = lastEditedOn;
}
function parse_url(u) {
let tend = u.indexOf(':');
if (tend<0) {
console.log("bad url, missing :");
return null;
}
// got type
let t = u.substring(0,tend);
let h = null;
let p = "";
// if of form <type>:// then means has fqhn, otherwise no
if (u.substring(tend+1, tend+3)=="//") {
let hend = u.indexOf('/', tend+3);
if (hend<0) {
h = u.substring(tend+3);
console.log("no path foound after fqdn ["+h+"]");
} else {
h = u.substring(tend+3, hend);
p = u.substring(hend);
}
} else {
// No host part, rest is 'path' (eg file:/r/d/d/f or data:<data>)
p = u.substring(tend+1);
}
console.log("url ["+u+"] parsed, type=["+t+"] fqdn=["+h+"] path=["+p+"]");
return { 'type':t, 'fqdn':h, 'path':p};
}
// get andf decode a file
async function getFile() {
let user = document.getElementById("userName").value;
// Generate 256 bit key for AES, using per doc phrase combined with user name, plus static salt
let key = makeDocKey(document.getElementById("passPhrase").value, user);
if (key===null) {
return;
}
let url = document.getElementById("docURL").value;
// Parse url
// Parse url and check ok
let pu = parse_url(url);
if (pu===null) {
popup("url unparseable");
return;
}
let url_bits = null;
// get encrypted file (it's a base64 string)
if (pu.type==="ls") {
let path = pu.path+'_'+hex_sha1(user);
console.log("loading from localStorage with key:"+path);
url_bits = localStorage.getItem(path);
} else if (pu.type==="rs") {
popup("url type:"+pu.type+" not yet implemented");
return;
} else if (pu.type==="https") {
popup("url type:"+pu.type+" not yet implemented");
return;
} else if (pu.type==="file") {
url_bits = await fsLoad(pu.path); // may have no path, uses a picker
console.log("loading from file got ["+url_bits+"]");
} else if (pu.type==="data") {
url_bits = pu.path; // data base64 string directly here
console.log("loading from file got ["+url_bits+"]");
} else {
popup("unknown url type:"+pu.type);
return;
}
// un-b64 it
let encrypted_bits = base64_decode(url_bits);
//console.log("url_bits:["+url_bits+"] after b64 decode:["+encrypted_bits+"]");
// decrypt it using passphrase
let decrypted_text = utf82str(aes_decrypt(key, encrypted_bits));
// parse info line (first line) : <SHA-1 hash of rest>;length;last edit timestamp;last editor; last edit device...
let eofl = decrypted_text.indexOf('\n');
if (eofl<0) {
popup("incorrect key");
console.log("bad decrypt (no CR) to :"+decrypted_text);
return;
}
let firstline_els = decrypted_text.substring(0, eofl).split(';');
if (firstline_els.length<5) {
popup("incorrect key");
console.log("bad first line: not enough elements ["+firstline_els+"]");
return;
}
//console.log("loaded and decrypted, first line is ["+firstline_els+"]");
let fhash = firstline_els[0];
// hash rest of decrypted text and check against hash (basically checks if the file decrypted correctly)
// SHA-1 hash of it
let sha1hash = hex_sha1(decrypted_text.substring(eofl+1));
// if not, popup error
if (fhash!=sha1hash) {
popup("incorrect key");
console.log("bad hash match first line says hash is ["+fhash+"] while sha1 of rest is ["+sha1hash+"]");
return;
}
// fill textedit box with contents
document.getElementById("fileEditor").value=decrypted_text.substring(eofl+1);
// fill info fields
setFileInfo(firstline_els[2], firstline_els[3], firstline_els[4]);
return;
}
async function saveFile() {
let user = document.getElementById("userName").value;
// Generate 256 bit key for AES, using per doc phrase combined with user name, plus static salt
let key = makeDocKey(document.getElementById("passPhrase").value, user);
if (key===null) {
return;
}
let url = document.getElementById("docURL").value;
// Parse url and check ok
let pu = parse_url(url);
if (pu===null) {
popup("url unparseable");
return;
}
// get text from text area
let rawtext = document.getElementById("fileEditor").value;
// SHA-1 hash of it
let sha1hash = hex_sha1(rawtext);
// create 1st line info
let firstline = sha1hash+";"+rawtext.length+";"+iso_date()+";"+user+";"+getMachine()+"\n";
console.log("saving, first line is ["+firstline+"]");
// encrypt it all
let encrypted_bits = aes_encrypt(key, str2utf8(firstline+rawtext));
// mash it all into a base64 string
let b64_text = base64_encode(encrypted_bits);
// save it to the URL
if (pu.type==="ls") {
// The path is a) visible to other users and b) not protected against overwriting
// make its name hard by using hash of user/pass (hash so these are not exposed!)
let path = pu.path+'_'+hex_sha1(user);
console.log("saving to localStorage with key:"+path+" text is ["+b64_text+"]");
localStorage.setItem(path, b64_text);
} else if (pu.type==="remoteStorage") {
popup("url type:"+pu.type+" not yet implemented");
} else if (pu.type==="https") {
popup("url type:"+pu.type+" not yet implemented");
} else if (pu.type==="file") {
// can have no path, uses a picker
let res =await fsSave(pu.path, b64_text);
if (!res) {
popip("save failed !");
}
} else if (pu.type==="data") {
document.getElementById("docURL").value = 'data:'+b64_text; // data base64 string directly here
} else {
popup("unknown url type:"+pu.type);
}
// update info fields in html
setFileInfo(iso_date(), user, getMachine());
return;
}
function makeDocKey(keyphrase, user) {
if (keyphrase === undefined || keyphrase.length < 8) {
popup("Please ensure you have a pass phrase at least 8 chars long");
return null;
}
if (user === undefined || user.length < 4) {
popup("Please ensure you have a user name at least 5 chars long");
return null;
}
// Generate 256 bit key for AES, using key phrase combined with user name and fixed string as salt (ensures that attacker controlled entry is not the only data)
return genKey(keyphrase+'_'+user, "allMySecretsin2022", 32);
}
async function fsLoad(fp) {
try {
let file = null;
if (fp===null || fp.length==0) {
let fhl = await window.showOpenFilePicker({ multiple:false});
if (fhl.length==0) {
console.log("no file returned");
return null;
}
file = await fhl[0].getFile(); // Should only be 1!
} else {
file = new File([],fp);
}
// open and read file selected
let data = await new Promise((resolve, reject) => {
let reader = new window.FileReader();
reader.onload = (e) => {
resolve(e.target.result);
}
reader.readAsText(file);
});
console.log("from ["+file.name+"] read data ["+data+"]");
return data;
} catch (err) {
console.log("exception opening file:"+err);
return null;
}
}
async function fsSave(fp, data) {
try {
let fopts= {};
if (fp!==null && fp.length>0) {
fopts = { suggestedName:fp };
}
let fh = await window.showSaveFilePicker(fopts);
// open and write to file selected (only 1)
let stream = await fh.createWritable({ keepExistingData: false });
await stream.write(data);
await stream.close();
console.log("wrote data to file ["+fh.name+"]");
return true;
} catch (err) {
console.log("exception opening file:"+err);
return false;
}
}
function getMachine() {
// navigator.userAgent gives unreadable stuff (not just 'Chrome' or 'Firefox', and also has ';' in it)
return navigator.platform;
}
function padZero(n) {
if (n<0) {
return n;
}
if (n<10) {
return '0'+n;
}
return ''+n;
}
function iso_date(d) {
try {
if (d===undefined) {
d = new Date();
}
//need 0 pad to make fixed size fields
return padZero(d.getHours())+':'+padZero(d.getMinutes())+':'+padZero(d.getSeconds())+' '+padZero(d.getDate())+'-'+padZero(d.getMonth()+1)+'-'+d.getFullYear();
} catch (e) {
return '"'+d+'"';
}
}
function makeDeviceId(did) {
if (did===undefined || did===null) {
return null;
}
// device id is either the full 12 digits or just the last 4
if (did.length == 4) {
return ("240ac40a" + did).toLowerCase();
} else if (did.length == 12) {
return did.toLowerCase();
}
return null;
}
function genKey(passphrase, salt, klenInBytes) {
// translate textual key phrase to bits and pad to desired bit length
// Returns UInt8Array of 'klenInBytes' bytes
//return str2utf8(k+'012345678901234567890123456789'.substring(0,31));
try {
ret = PBKDF2(passphrase, salt, 1000, klenInBytes);
return hexToBytes(ret);
} catch(error) {
console.log("failed to generate key from["+passphrase+"]");
throw error;
}
}
/* not used
async function dervive_and_wait_for_key(passphrase, salt, klenInBytes) {
// Use pdksf function
const mypbkdf2 = new PBKDF2(passphrase, salt, 1000, klenInBytes);
console.log("waiting for key from ["+passphrase+"]....");
return await new Promise((resolve, reject) => {
mypbkdf2.deriveKey(
(percent_done) => {
//console.log("key derivation "+percent_done+"% done");
},
(key) => {
console.log("key derivation done for ["+passphrase+"]");
if (key!==null) {
resolve(key);
}
reject("no key generated");
});
});
}
*/
const encoder = new TextEncoder('UTF-8');
const decoder = new TextDecoder('UTF-8');
const str2utf8 = (text) => {
// returns an array with the UTF-8 bytes
let ui_array = encoder.encode(text);
let bytes = [];
for (var i = 0; i < ui_array.length; i++) {
bytes.push(ui_array[i]);
}
return bytes;
};
const utf82str = (bits) => {
// If bits is not uint8Array, convert to that
if (!(bits instanceof ArrayBuffer)) {
var len = bits.length;
var bytes = new Uint8Array( len );
for (var i = 0; i < len; i++) {
bytes[i] = bits[i];
}
return decoder.decode(bytes);
}
// Takes a UInt8Array and returns string
return decoder.decode(bits);
};
// Convert a hex string to a byte array
function hexToBytes(hex) {
let bytes = [];
for (let c = 0; c < hex.length; c += 2)
bytes.push(parseInt(hex.substr(c, 2), 16));
return bytes;
}
// Convert a byte array to a hex string
function bytesToHex(bytes) {
let hex = [];
for (let i = 0; i < bytes.length; i++) {
let current = bytes[i] < 0 ? bytes[i] + 256 : bytes[i];
hex.push((current >>> 4).toString(16));
hex.push((current & 0xF).toString(16));
}
return hex.join("");
}
// String (base64) to byte array
function base64_decode(s) {
// atob returns a binary string, we want array of bytes
var binary_string = atob(s);
var len = binary_string.length;
var bytes = [];
for (var i = 0; i < len; i++) {
bytes.push(binary_string.charCodeAt(i));
}
return bytes;
}
// byte array to string
function base64_encode(b) {
return btoa(String.fromCharCode.apply(null, new Uint8Array(b)));
}
function aes_encrypt(k, bits) {
let iv = genKey(document.getElementById("userName").value, "thisIsTheIV", 16);
return slowAES.encrypt(bits, slowAES.modeOfOperation.CBC, k, iv);
}
function aes_decrypt(k, bits) {
let iv = genKey(document.getElementById("userName").value, "thisIsTheIV", 16);
return slowAES.decrypt(bits, slowAES.modeOfOperation.CBC, k, iv);
}
function test_crypto() {
let di="hello world i'm going to be encrypted";
let dobits = utf82str(str2utf8(di));
if (di!=dobits) {
console.log("utf8 bytes test fails : in ["+di+"] but do ["+dobits+"]");
return false;
}
console.log("utf8 bytes test OK");
let dob64 = utf82str(base64_decode(base64_encode(str2utf8(di))));
if (di!=dob64) {
console.log("b64 test fails : in ["+di+"] but do ["+dob64+"]");
return false;
}
console.log("base64 test OK");
let aeskey = genKey("thisIsMyKey", "this is salt", 32);
let doaes = utf82str(aes_decrypt(aeskey, aes_encrypt(aeskey, str2utf8(di))));
// let aescryp = aes_encrypt(aeskey, str2utf8(di));
// let aesdecryp = aes_decrypt(aeskey, aescryp);
// let doaes = utf82str(aesdecryp);
if (di!=doaes) {
// console.log("aes test fails : in ["+di+"] but crypted ["+aescryp+"] and decrypted ["+aesdecryp+"] do ["+doaes+"]");
console.log("aes test fails : in ["+di+"] but do ["+doaes+"]");
return false;
}
console.log("aes test OK");
return true;
}
// AES.JS
/*
* 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);