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Prima Implementazione funzionante. KeyScheduler + Encrypter

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Giovanni Di Grezia
2015-05-14 04:49:13 +02:00
commit 8ecdcf9c7a
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/**
* Created by Giovanni on 12/05/2015.
*/
var state;
var Nr;
var Nk;
var w = [];
function dec_to_hex ( input ) {
var t = input.toString(16);
if (t.length == 1 )
return "0" + t;
return t;
}
function bin_to_hex ( input ) {
return dec_to_hex(parseInt(input,2));
}
function dec_to_bin ( input ) {
var t = input.toString(2);
var ret=t;
if (t.length < 8 )
for (var i = 0 ; i < (8 - t.length) ; i++){
ret = "0" + ret;
}
return ret;
}
function hex_to_bin (input) {
return dec_to_bin(parseInt(input, 16));
}
function hex_to_dec(input){
return parseInt(input, 16);
}
function bin_to_dec(input){
return parseInt(input, 2);
}
function matchExact(r, str) {
var match = str.match(r);
return match != null && str == match[0];
}
var byte = function (string){
if (string == undefined || string.length > 8 || !matchExact(/((?:[0-1]+)*)/,string))
this.content= ["0","0","0","0","0","0","0","0"];
else
{
this.content= [];
for (var i = 0; i < (8 - string.length); i++) {
this.content[i] = 0;
}
for (; i < 8; i++) {
this.content[i] = string[i - 8 + string.length];
}
}
this.hex = function (){return dec_to_hex(this.dec())};
this.bin=function (){
var t="";
for (var i = 0 ; i< 8 ; i++){
t = t + this.content[i];
}
return t;
};
this.dec =function(){return bin_to_dec(this.bin())};
this.set = function(string){
if (string == undefined || string.length > 8 || !matchExact(/((?:[0-1]+)*)/,string))
this.content= ["0","0","0","0","0","0","0","0"];
else
{
this.content= [];
for (var i = 0; i < (8 - string.length); i++) {
this.content[i] = 0;
}
for (; i < 8; i++) {
this.content[i] = string[i - 8 + string.length];
}
}
}
};
var word = function (b1,b2,b3,b4){
if (arguments.length !=4 ) {
this.byte0 = new byte();
this.byte1 = new byte();
this.byte2 = new byte();
this.byte3 = new byte();
} else {
this.byte0 = new byte(b1);
this.byte1 = new byte(b2);
this.byte2 = new byte(b3);
this.byte3 = new byte(b4);
}
this.bin = function(){
return this.byte0.bin() + this.byte1.bin() + this.byte2.bin() + this.byte3.bin();
}
this.hex = function(){
return this.byte0.hex() + this.byte1.hex() + this.byte2.hex() + this.byte3.hex();
}
};
function xor_byte (first,second){
var ret = new byte();
for (var i = 0; i< 8; i++){
if ( (first.content[i] == "0" && second.content[i] == "0" ) || (first.content[i] == "1" && second.content[i] == "1" ))
ret.content[i] = "0";
else
ret.content[i] = "1";
}
return ret;
}
function AddRoundKey(w){
for (var i = 0 ; i< 4 ;i++){
state[0][i] = xor_byte( state[0][i],w[i].byte0);
state[1][i] = xor_byte( state[1][i],w[i].byte1);
state[2][i] = xor_byte( state[2][i],w[i].byte2);
state[3][i] = xor_byte( state[3][i],w[i].byte3);
}
}
function SubBytes(){
for (var i = 0 ; i< 4 ;i++){
for (var j = 0 ; j< 4 ;j++){
state[i][j] = new byte(hex_to_bin(SubBytesMatrix[hex_to_dec(state[i][j].hex().charAt(0))][hex_to_dec(state[i][j].hex().charAt(1))]));
}
}
}
var SubBytesMatrix = [
["63","7C","77","7B","F2","6B","6F","C5","30","01","67","2B","FE","D7","AB","76"],
["CA","82","C9","7D","FA","59","47","F0","AD","D4","A2","AF","9C","A4","72","C0"],
["B7","FD","93","26","36","3F","F7","CC","34","A5","E5","F1","71","D8","31","15"],
["04","C7","23","C3","18","96","05","9A","07","12","80","E2","EB","27","B2","75"],
["09","83","2C","1A","1B","6E","5A","A0","52","3B","D6","B3","29","E3","2F","84"],
["53","D1","00","ED","20","FC","B1","5B","6A","CB","BE","39","4A","4C","58","CF"],
["D0","EF","AA","FB","43","4D","33","85","45","F9","02","7F","50","3C","9F","A8"],
["51","A3","40","8F","92","9D","38","F5","BC","B6","DA","21","10","FF","F3","D2"],
["CD","0C","13","EC","5F","97","44","17","C4","A7","7E","3D","64","5D","19","73"],
["60","81","4F","DC","22","2A","90","88","46","EE","B8","14","DE","5E","0B","DB"],
["E0","32","3A","0A","49","06","24","5C","C2","D3","AC","62","91","95","E4","79"],
["E7","C8","37","6D","8D","D5","4E","A9","6C","56","F4","EA","65","7A","AE","08"],
["BA","78","25","2E","1C","A6","B4","C6","E8","DD","74","1F","4B","BD","8B","8A"],
["70","3E","B5","66","48","03","F6","0E","61","35","57","B9","86","C1","1D","9E"],
["E1","F8","98","11","69","D9","8E","94","9B","1E","87","E9","CE","55","28","DF"],
["8C","A1","89","0D","BF","E6","42","68","41","99","2D","0F","B0","54","BB","16"]
];
var MixColumnsMatrix =[
["00","00","00","00","00","00"],["02","03","09","0b","0d","0e"],
["04","06","12","16","1a","1c"],["06","05","1b","1d","17","12"],
["08","0c","24","2c","34","38"],["0a","0f","2d","27","39","36"],
["0c","0a","36","3a","2e","24"],["0e","09","3f","31","23","2a"],
["10","18","48","58","68","70"],["12","1b","41","53","65","7e"],
["14","1e","5a","4e","72","6c"],["16","1d","53","45","7f","62"],
["18","14","6c","74","5c","48"],["1a","17","65","7f","51","46"],
["1c","12","7e","62","46","54"],["1e","11","77","69","4b","5a"],
["20","30","90","b0","d0","e0"],["22","33","99","bb","dd","ee"],
["24","36","82","a6","ca","fc"],["26","35","8b","ad","c7","f2"],
["28","3c","b4","9c","e4","d8"],["2a","3f","bd","97","e9","d6"],
["2c","3a","a6","8a","fe","c4"],["2e","39","af","81","f3","ca"],
["30","28","d8","e8","b8","90"],["32","2b","d1","e3","b5","9e"],
["34","2e","ca","fe","a2","8c"],["36","2d","c3","f5","af","82"],
["38","24","fc","c4","8c","a8"],["3a","27","f5","cf","81","a6"],
["3c","22","ee","d2","96","b4"],["3e","21","e7","d9","9b","ba"],
["40","60","3b","7b","bb","db"],["42","63","32","70","b6","d5"],
["44","66","29","6d","a1","c7"],["46","65","20","66","ac","c9"],
["48","6c","1f","57","8f","e3"],["4a","6f","16","5c","82","ed"],
["4c","6a","0d","41","95","ff"],["4e","69","04","4a","98","f1"],
["50","78","73","23","d3","ab"],["52","7b","7a","28","de","a5"],
["54","7e","61","35","c9","b7"],["56","7d","68","3e","c4","b9"],
["58","74","57","0f","e7","93"],["5a","77","5e","04","ea","9d"],
["5c","72","45","19","fd","8f"],["5e","71","4c","12","f0","81"],
["60","50","ab","cb","6b","3b"],["62","53","a2","c0","66","35"],
["64","56","b9","dd","71","27"],["66","55","b0","d6","7c","29"],
["68","5c","8f","e7","5f","03"],["6a","5f","86","ec","52","0d"],
["6c","5a","9d","f1","45","1f"],["6e","59","94","fa","48","11"],
["70","48","e3","93","03","4b"],["72","4b","ea","98","0e","45"],
["74","4e","f1","85","19","57"],["76","4d","f8","8e","14","59"],
["78","44","c7","bf","37","73"],["7a","47","ce","b4","3a","7d"],
["7c","42","d5","a9","2d","6f"],["7e","41","dc","a2","20","61"],
["80","c0","76","f6","6d","ad"],["82","c3","7f","fd","60","a3"],
["84","c6","64","e0","77","b1"],["86","c5","6d","eb","7a","bf"],
["88","cc","52","da","59","95"],["8a","cf","5b","d1","54","9b"],
["8c","ca","40","cc","43","89"],["8e","c9","49","c7","4e","87"],
["90","d8","3e","ae","05","dd"],["92","db","37","a5","08","d3"],
["94","de","2c","b8","1f","c1"],["96","dd","25","b3","12","cf"],
["98","d4","1a","82","31","e5"],["9a","d7","13","89","3c","eb"],
["9c","d2","08","94","2b","f9"],["9e","d1","01","9f","26","f7"],
["a0","f0","e6","46","bd","4d"],["a2","f3","ef","4d","b0","43"],
["a4","f6","f4","50","a7","51"],["a6","f5","fd","5b","aa","5f"],
["a8","fc","c2","6a","89","75"],["aa","ff","cb","61","84","7b"],
["ac","fa","d0","7c","93","69"],["ae","f9","d9","77","9e","67"],
["b0","e8","ae","1e","d5","3d"],["b2","eb","a7","15","d8","33"],
["b4","ee","bc","08","cf","21"],["b6","ed","b5","03","c2","2f"],
["b8","e4","8a","32","e1","05"],["ba","e7","83","39","ec","0b"],
["bc","e2","98","24","fb","19"],["be","e1","91","2f","f6","17"],
["c0","a0","4d","8d","d6","76"],["c2","a3","44","86","db","78"],
["c4","a6","5f","9b","cc","6a"],["c6","a5","56","90","c1","64"],
["c8","ac","69","a1","e2","4e"],["ca","af","60","aa","ef","40"],
["cc","aa","7b","b7","f8","52"],["ce","a9","72","bc","f5","5c"],
["d0","b8","05","d5","be","06"],["d2","bb","0c","de","b3","08"],
["d4","be","17","c3","a4","1a"],["d6","bd","1e","c8","a9","14"],
["d8","b4","21","f9","8a","3e"],["da","b7","28","f2","87","30"],
["dc","b2","33","ef","90","22"],["de","b1","3a","e4","9d","2c"],
["e0","90","dd","3d","06","96"],["e2","93","d4","36","0b","98"],
["e4","96","cf","2b","1c","8a"],["e6","95","c6","20","11","84"],
["e8","9c","f9","11","32","ae"],["ea","9f","f0","1a","3f","a0"],
["ec","9a","eb","07","28","b2"],["ee","99","e2","0c","25","bc"],
["f0","88","95","65","6e","e6"],["f2","8b","9c","6e","63","e8"],
["f4","8e","87","73","74","fa"],["f6","8d","8e","78","79","f4"],
["f8","84","b1","49","5a","de"],["fa","87","b8","42","57","d0"],
["fc","82","a3","5f","40","c2"],["fe","81","aa","54","4d","cc"],
["1b","9b","ec","f7","da","41"],["19","98","e5","fc","d7","4f"],
["1f","9d","fe","e1","c0","5d"],["1d","9e","f7","ea","cd","53"],
["13","97","c8","db","ee","79"],["11","94","c1","d0","e3","77"],
["17","91","da","cd","f4","65"],["15","92","d3","c6","f9","6b"],
["0b","83","a4","af","b2","31"],["09","80","ad","a4","bf","3f"],
["0f","85","b6","b9","a8","2d"],["0d","86","bf","b2","a5","23"],
["03","8f","80","83","86","09"],["01","8c","89","88","8b","07"],
["07","89","92","95","9c","15"],["05","8a","9b","9e","91","1b"],
["3b","ab","7c","47","0a","a1"],["39","a8","75","4c","07","af"],
["3f","ad","6e","51","10","bd"],["3d","ae","67","5a","1d","b3"],
["33","a7","58","6b","3e","99"],["31","a4","51","60","33","97"],
["37","a1","4a","7d","24","85"],["35","a2","43","76","29","8b"],
["2b","b3","34","1f","62","d1"],["29","b0","3d","14","6f","df"],
["2f","b5","26","09","78","cd"],["2d","b6","2f","02","75","c3"],
["23","bf","10","33","56","e9"],["21","bc","19","38","5b","e7"],
["27","b9","02","25","4c","f5"],["25","ba","0b","2e","41","fb"],
["5b","fb","d7","8c","61","9a"],["59","f8","de","87","6c","94"],
["5f","fd","c5","9a","7b","86"],["5d","fe","cc","91","76","88"],
["53","f7","f3","a0","55","a2"],["51","f4","fa","ab","58","ac"],
["57","f1","e1","b6","4f","be"],["55","f2","e8","bd","42","b0"],
["4b","e3","9f","d4","09","ea"],["49","e0","96","df","04","e4"],
["4f","e5","8d","c2","13","f6"],["4d","e6","84","c9","1e","f8"],
["43","ef","bb","f8","3d","d2"],["41","ec","b2","f3","30","dc"],
["47","e9","a9","ee","27","ce"],["45","ea","a0","e5","2a","c0"],
["7b","cb","47","3c","b1","7a"],["79","c8","4e","37","bc","74"],
["7f","cd","55","2a","ab","66"],["7d","ce","5c","21","a6","68"],
["73","c7","63","10","85","42"],["71","c4","6a","1b","88","4c"],
["77","c1","71","06","9f","5e"],["75","c2","78","0d","92","50"],
["6b","d3","0f","64","d9","0a"],["69","d0","06","6f","d4","04"],
["6f","d5","1d","72","c3","16"],["6d","d6","14","79","ce","18"],
["63","df","2b","48","ed","32"],["61","dc","22","43","e0","3c"],
["67","d9","39","5e","f7","2e"],["65","da","30","55","fa","20"],
["9b","5b","9a","01","b7","ec"],["99","58","93","0a","ba","e2"],
["9f","5d","88","17","ad","f0"],["9d","5e","81","1c","a0","fe"],
["93","57","be","2d","83","d4"],["91","54","b7","26","8e","da"],
["97","51","ac","3b","99","c8"],["95","52","a5","30","94","c6"],
["8b","43","d2","59","df","9c"],["89","40","db","52","d2","92"],
["8f","45","c0","4f","c5","80"],["8d","46","c9","44","c8","8e"],
["83","4f","f6","75","eb","a4"],["81","4c","ff","7e","e6","aa"],
["87","49","e4","63","f1","b8"],["85","4a","ed","68","fc","b6"],
["bb","6b","0a","b1","67","0c"],["b9","68","03","ba","6a","02"],
["bf","6d","18","a7","7d","10"],["bd","6e","11","ac","70","1e"],
["b3","67","2e","9d","53","34"],["b1","64","27","96","5e","3a"],
["b7","61","3c","8b","49","28"],["b5","62","35","80","44","26"],
["ab","73","42","e9","0f","7c"],["a9","70","4b","e2","02","72"],
["af","75","50","ff","15","60"],["ad","76","59","f4","18","6e"],
["a3","7f","66","c5","3b","44"],["a1","7c","6f","ce","36","4a"],
["a7","79","74","d3","21","58"],["a5","7a","7d","d8","2c","56"],
["db","3b","a1","7a","0c","37"],["d9","38","a8","71","01","39"],
["df","3d","b3","6c","16","2b"],["dd","3e","ba","67","1b","25"],
["d3","37","85","56","38","0f"],["d1","34","8c","5d","35","01"],
["d7","31","97","40","22","13"],["d5","32","9e","4b","2f","1d"],
["cb","23","e9","22","64","47"],["c9","20","e0","29","69","49"],
["cf","25","fb","34","7e","5b"],["cd","26","f2","3f","73","55"],
["c3","2f","cd","0e","50","7f"],["c1","2c","c4","05","5d","71"],
["c7","29","df","18","4a","63"],["c5","2a","d6","13","47","6d"],
["fb","0b","31","ca","dc","d7"],["f9","08","38","c1","d1","d9"],
["ff","0d","23","dc","c6","cb"],["fd","0e","2a","d7","cb","c5"],
["f3","07","15","e6","e8","ef"],["f1","04","1c","ed","e5","e1"],
["f7","01","07","f0","f2","f3"],["f5","02","0e","fb","ff","fd"],
["eb","13","79","92","b4","a7"],["e9","10","70","99","b9","a9"],
["ef","15","6b","84","ae","bb"],["ed","16","62","8f","a3","b5"],
["e3","1f","5d","be","80","9f"],["e1","1c","54","b5","8d","91"],
["e7","19","4f","a8","9a","83"],["e5","1a","46","a3","97","8d"]
];
function ShiftRows() {
var t1,t2,t3;
t1 = state[1][0];
state[1][0] = state[1][1];
state[1][1] = state[1][2];
state[1][2] = state[1][3];
state[1][3] = t1;
t1 = state[2][0];
t2 = state[2][1];
state[2][0] = state[2][2];
state[2][1] = state[2][3];
state[2][2] = t1;
state[2][3] = t2;
t1 = state[3][0];
t2 = state[3][1];
t3 = state[3][2];
state[3][0] = state[3][3];
state[3][1] = t1;
state[3][2] = t2;
state[3][3] = t3;
}
function MixColumns(){
for (var i = 0 ; i< 4 ;i++){
var first = xor_byte( xor_byte ( xor_byte( new byte( hex_to_bin(MixColumnsMatrix[hex_to_dec(state[0][i].hex())][0])) , new byte(hex_to_bin(MixColumnsMatrix[hex_to_dec(state[1][i].hex())][1])) ) , state[2][i] ) , state[3][i] );
var second = xor_byte( xor_byte ( xor_byte( new byte( hex_to_bin(MixColumnsMatrix[hex_to_dec(state[1][i].hex())][0])) , new byte(hex_to_bin(MixColumnsMatrix[hex_to_dec(state[2][i].hex())][1])) ) , state[0][i] ) , state[3][i] );
var third = xor_byte( xor_byte ( xor_byte( new byte( hex_to_bin(MixColumnsMatrix[hex_to_dec(state[2][i].hex())][0])) , new byte(hex_to_bin(MixColumnsMatrix[hex_to_dec(state[3][i].hex())][1])) ) , state[0][i] ) , state[1][i] );
var fourth = xor_byte( xor_byte ( xor_byte( new byte( hex_to_bin(MixColumnsMatrix[hex_to_dec(state[3][i].hex())][0])) , new byte(hex_to_bin(MixColumnsMatrix[hex_to_dec(state[0][i].hex())][1])) ) , state[1][i] ) , state[2][i] );
state[0][i] = first;
state[1][i] = second;
state[2][i] = third;
state[3][i] = fourth;
}
}
function print_state(){
var ret = "";
for (var r = 0 ; r < 4; r++){
for (var c = 0 ; c < 4; c++){
ret += state[r][c].hex();
}
}
return ret;
}
//Cipher(byte in[16], byte out[16], word w[4*(Nr+1)])
function encrypt (inp){
//////////////////////////////////// begin state = in byte
// state[4,Nb]
//state = in
state = new Array(4);
for (var i = 0 ;i< 4; i++){
state[i] = new Array(4);
}
for (var r = 0 ; r < 4; r++){
for (var c = 0 ; c < 4; c++){
state[r][c]= inp[ r + 4*c];
}
}
///////////////////////////////////////////////////////
//Initiation
AddRoundKey(w.slice(0,4));
console.log("begin round " + print_state());
//Rounds 0 to n-1
for (var round = 1; round < Nr ; round++) {
SubBytes();
console.log("round "+ round + " SubBytes " + print_state());
ShiftRows();
console.log("round "+ round + " ShiftRow " + print_state());
MixColumns();
console.log("round "+ round + " MixColumns " + print_state());
AddRoundKey(w.slice(round * 4, ((round + 1) * 4)));
console.log("round "+ round + " AddRoundKey " + print_state());
}
//Last round
SubBytes();
console.log("round "+ round + " SubBytes " + print_state());
ShiftRows();
console.log("round "+ round + " ShiftRow " + print_state());
AddRoundKey(w.slice(Nr*4, ((Nr+1)*4)));
console.log("round "+ round + " AddRoundKey " + print_state());
// end last round
//out = state
//byte out[16]
var out = new Array(16);
for ( r = 0 ; r < 4; r++){
for ( c = 0 ; c < 4; c++){
out[r + 4*c] = state[r][c];
}
}
return out;
}
function print_result (out){
var ret="";
for (var i=0;i < out.length;i++){
ret+=out[i].hex();
}
return ret;
}
//byte key[4*Nk], word w[4*(Nr+1)]
function KeyExpansion(key){
if (key.length * 8 == 128) {
Nk = 4;
Nr = 10;
} else if (key.length * 8 == 192){
Nk = 6;
Nr = 12;
}else {
Nk=8;
Nr = 14;
}
console.log("nk " + Nk);
console.log("nr " + Nr);
//word temp
var temp;
var i = 0;
while (i < Nk) {
w[i] = new word(key[4 * i].bin(), key[4 * i + 1].bin(), key[4 * i + 2].bin(), key[4 * i + 3].bin());
console.log("w" + i +" " + w[i].hex());
i++;
}
i = Nk;
while (i < 4 * (Nr+1)) {
temp = w[i - 1];
console.log("temp" + temp.hex());
if ( (i % Nk) == 0 ) {
temp = xor_word(SubWord(RotWord(temp)), Rcon(i / Nk));
console.log("after xor with rcon " + temp.hex());
}else if ((Nk > 6 ) && ((i % Nk) == 4 ) )
temp = SubWord(temp);
w[i] = xor_word(w[i - Nk],temp);
console.log("w[i - Nk] " + w[i - Nk].hex());
console.log("w[i] " + w[i].hex());
i++;
}
}
function SubWord( input_word){
var byte0 = new byte(hex_to_bin(SubBytesMatrix[hex_to_dec(input_word.byte0.hex().charAt(0))][hex_to_dec(input_word.byte0.hex().charAt(1))]));
var byte1 = new byte(hex_to_bin(SubBytesMatrix[hex_to_dec(input_word.byte1.hex().charAt(0))][hex_to_dec(input_word.byte1.hex().charAt(1))]));
var byte2 = new byte(hex_to_bin(SubBytesMatrix[hex_to_dec(input_word.byte2.hex().charAt(0))][hex_to_dec(input_word.byte2.hex().charAt(1))]));
var byte3 = new byte(hex_to_bin(SubBytesMatrix[hex_to_dec(input_word.byte3.hex().charAt(0))][hex_to_dec(input_word.byte3.hex().charAt(1))]));
var ret = new word(byte0.bin(),byte1.bin(),byte2.bin(),byte3.bin());
console.log("subword " + ret.hex());
return ret;
}
function Rcon (input){
console.log("rcon input " + input);
var value="01";
for (var i = 0;i < input -1; i++){
value = MixColumnsMatrix[hex_to_dec(value)][0];
}
var ret = new word( hex_to_bin(value),hex_to_bin("00"),hex_to_bin("00"),hex_to_bin("00") );
console.log("rcon " + ret.hex());
return ret;
}
function RotWord ( input){
var ret = new word();
ret.byte0 = input.byte1;
ret.byte1 = input.byte2;
ret.byte2 = input.byte3;
ret.byte3 = input.byte0;
console.log("rotword " + ret.hex());
return ret;
}
function xor_word (first,second){
var byte0 = xor_byte(first.byte0,second.byte0);
var byte1 = xor_byte(first.byte1,second.byte1);
var byte2 = xor_byte(first.byte2,second.byte2);
var byte3 = xor_byte(first.byte3,second.byte3);
var ret = new word(byte0.bin(),byte1.bin(),byte2.bin(),byte3.bin());
return ret;
}