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SunjiApplet/utils/des-util.js

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/**
* DES加密/解密
* @Copyright Copyright (c) 2006
* @author Guapo
* @see DESCore
*/
/*
* encrypt the string to string made up of hex
* return the encrypted string
*/
function strEnc(data, firstKey, secondKey, thirdKey) {
var leng = data.length;
var encData = "";
var firstKeyBt, secondKeyBt, thirdKeyBt, firstLength, secondLength, thirdLength;
if (firstKey != null && firstKey != "") {
firstKeyBt = getKeyBytes(firstKey);
firstLength = firstKeyBt.length;
}
if (secondKey != null && secondKey != "") {
secondKeyBt = getKeyBytes(secondKey);
secondLength = secondKeyBt.length;
}
if (thirdKey != null && thirdKey != "") {
thirdKeyBt = getKeyBytes(thirdKey);
thirdLength = thirdKeyBt.length;
}
if (leng > 0) {
if (leng < 4) {
var bt = strToBt(data);
var encByte;
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != "") {
var tempBt;
var x, y, z;
tempBt = bt;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
for (y = 0; y < secondLength; y++) {
tempBt = enc(tempBt, secondKeyBt[y]);
}
for (z = 0; z < thirdLength; z++) {
tempBt = enc(tempBt, thirdKeyBt[z]);
}
encByte = tempBt;
} else {
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "") {
var tempBt;
var x, y;
tempBt = bt;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
for (y = 0; y < secondLength; y++) {
tempBt = enc(tempBt, secondKeyBt[y]);
}
encByte = tempBt;
} else {
if (firstKey != null && firstKey != "") {
var tempBt;
var x = 0;
tempBt = bt;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
encByte = tempBt;
}
}
}
encData = bt64ToHex(encByte);
} else {
var iterator = parseInt(leng / 4);
var remainder = leng % 4;
var i = 0;
for (i = 0; i < iterator; i++) {
var tempData = data.substring(i * 4 + 0, i * 4 + 4);
var tempByte = strToBt(tempData);
var encByte;
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != "") {
var tempBt;
var x, y, z;
tempBt = tempByte;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
for (y = 0; y < secondLength; y++) {
tempBt = enc(tempBt, secondKeyBt[y]);
}
for (z = 0; z < thirdLength; z++) {
tempBt = enc(tempBt, thirdKeyBt[z]);
}
encByte = tempBt;
} else {
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "") {
var tempBt;
var x, y;
tempBt = tempByte;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
for (y = 0; y < secondLength; y++) {
tempBt = enc(tempBt, secondKeyBt[y]);
}
encByte = tempBt;
} else {
if (firstKey != null && firstKey != "") {
var tempBt;
var x;
tempBt = tempByte;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
encByte = tempBt;
}
}
}
encData += bt64ToHex(encByte);
}
if (remainder > 0) {
var remainderData = data.substring(iterator * 4 + 0, leng);
var tempByte = strToBt(remainderData);
var encByte;
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != "") {
var tempBt;
var x, y, z;
tempBt = tempByte;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
for (y = 0; y < secondLength; y++) {
tempBt = enc(tempBt, secondKeyBt[y]);
}
for (z = 0; z < thirdLength; z++) {
tempBt = enc(tempBt, thirdKeyBt[z]);
}
encByte = tempBt;
} else {
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "") {
var tempBt;
var x, y;
tempBt = tempByte;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
for (y = 0; y < secondLength; y++) {
tempBt = enc(tempBt, secondKeyBt[y]);
}
encByte = tempBt;
} else {
if (firstKey != null && firstKey != "") {
var tempBt;
var x;
tempBt = tempByte;
for (x = 0; x < firstLength; x++) {
tempBt = enc(tempBt, firstKeyBt[x]);
}
encByte = tempBt;
}
}
}
encData += bt64ToHex(encByte);
}
}
}
return encData;
}
/*
* decrypt the encrypted string to the original string
*
* return the original string
*/
function strDec(data, firstKey, secondKey, thirdKey) {
var leng = data.length;
var decStr = "";
var firstKeyBt, secondKeyBt, thirdKeyBt, firstLength, secondLength, thirdLength;
if (firstKey != null && firstKey != "") {
firstKeyBt = getKeyBytes(firstKey);
firstLength = firstKeyBt.length;
}
if (secondKey != null && secondKey != "") {
secondKeyBt = getKeyBytes(secondKey);
secondLength = secondKeyBt.length;
}
if (thirdKey != null && thirdKey != "") {
thirdKeyBt = getKeyBytes(thirdKey);
thirdLength = thirdKeyBt.length;
}
var iterator = parseInt(leng / 16);
var i = 0;
for (i = 0; i < iterator; i++) {
var tempData = data.substring(i * 16 + 0, i * 16 + 16);
var strByte = hexToBt64(tempData);
var intByte = new Array(64);
var j = 0;
for (j = 0; j < 64; j++) {
intByte[j] = parseInt(strByte.substring(j, j + 1));
}
var decByte;
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != "") {
var tempBt;
var x, y, z;
tempBt = intByte;
for (x = thirdLength - 1; x >= 0; x--) {
tempBt = dec(tempBt, thirdKeyBt[x]);
}
for (y = secondLength - 1; y >= 0; y--) {
tempBt = dec(tempBt, secondKeyBt[y]);
}
for (z = firstLength - 1; z >= 0; z--) {
tempBt = dec(tempBt, firstKeyBt[z]);
}
decByte = tempBt;
} else {
if (firstKey != null && firstKey != "" && secondKey != null && secondKey != "") {
var tempBt;
var x, y, z;
tempBt = intByte;
for (x = secondLength - 1; x >= 0; x--) {
tempBt = dec(tempBt, secondKeyBt[x]);
}
for (y = firstLength - 1; y >= 0; y--) {
tempBt = dec(tempBt, firstKeyBt[y]);
}
decByte = tempBt;
} else {
if (firstKey != null && firstKey != "") {
var tempBt;
var x, y, z;
tempBt = intByte;
for (x = firstLength - 1; x >= 0; x--) {
tempBt = dec(tempBt, firstKeyBt[x]);
}
decByte = tempBt;
}
}
}
decStr += byteToString(decByte);
}
return decStr;
}
/*
* chang the string into the bit array
*
* return bit array(it's length % 64 = 0)
*/
function getKeyBytes(key) {
var keyBytes = new Array();
var leng = key.length;
var iterator = parseInt(leng / 4);
var remainder = leng % 4;
var i = 0;
for (i = 0; i < iterator; i++) {
keyBytes[i] = strToBt(key.substring(i * 4 + 0, i * 4 + 4));
}
if (remainder > 0) {
keyBytes[i] = strToBt(key.substring(i * 4 + 0, leng));
}
return keyBytes;
}
/*
* chang the string(it's length <= 4) into the bit array
*
* return bit array(it's length = 64)
*/
function strToBt(str) {
var leng = str.length;
var bt = new Array(64);
if (leng < 4) {
var i = 0, j = 0, p = 0, q = 0;
for (i = 0; i < leng; i++) {
var k = str.charCodeAt(i);
for (j = 0; j < 16; j++) {
var pow = 1, m = 0;
for (m = 15; m > j; m--) {
pow *= 2;
}
bt[16 * i + j] = parseInt(k / pow) % 2;
}
}
for (p = leng; p < 4; p++) {
var k = 0;
for (q = 0; q < 16; q++) {
var pow = 1, m = 0;
for (m = 15; m > q; m--) {
pow *= 2;
}
bt[16 * p + q] = parseInt(k / pow) % 2;
}
}
} else {
for (i = 0; i < 4; i++) {
var k = str.charCodeAt(i);
for (j = 0; j < 16; j++) {
var pow = 1;
for (m = 15; m > j; m--) {
pow *= 2;
}
bt[16 * i + j] = parseInt(k / pow) % 2;
}
}
}
return bt;
}
/*
* chang the bit(it's length = 4) into the hex
*
* return hex
*/
function bt4ToHex(binary) {
var hex;
switch (binary) {
case "0000": hex = "0"; break;
case "0001": hex = "1"; break;
case "0010": hex = "2"; break;
case "0011": hex = "3"; break;
case "0100": hex = "4"; break;
case "0101": hex = "5"; break;
case "0110": hex = "6"; break;
case "0111": hex = "7"; break;
case "1000": hex = "8"; break;
case "1001": hex = "9"; break;
case "1010": hex = "A"; break;
case "1011": hex = "B"; break;
case "1100": hex = "C"; break;
case "1101": hex = "D"; break;
case "1110": hex = "E"; break;
case "1111": hex = "F"; break;
}
return hex;
}
/*
* chang the hex into the bit(it's length = 4)
*
* return the bit(it's length = 4)
*/
function hexToBt4(hex) {
var binary;
switch (hex) {
case "0": binary = "0000"; break;
case "1": binary = "0001"; break;
case "2": binary = "0010"; break;
case "3": binary = "0011"; break;
case "4": binary = "0100"; break;
case "5": binary = "0101"; break;
case "6": binary = "0110"; break;
case "7": binary = "0111"; break;
case "8": binary = "1000"; break;
case "9": binary = "1001"; break;
case "A": binary = "1010"; break;
case "B": binary = "1011"; break;
case "C": binary = "1100"; break;
case "D": binary = "1101"; break;
case "E": binary = "1110"; break;
case "F": binary = "1111"; break;
}
return binary;
}
/*
* chang the bit(it's length = 64) into the string
*
* return string
*/
function byteToString(byteData) {
var str = "";
for (var i = 0; i < 4; i++) {
var count = 0;
for (var j = 0; j < 16; j++) {
var pow = 1;
for (var m = 15; m > j; m--) {
pow *= 2;
}
count += byteData[16 * i + j] * pow;
}
if (count != 0) {
str += String.fromCharCode(count);
}
}
return str;
}
function bt64ToHex(byteData) {
var hex = "";
for (var i = 0; i < 16; i++) {
var bt = "";
for (var j = 0; j < 4; j++) {
bt += byteData[i * 4 + j];
}
hex += bt4ToHex(bt);
}
return hex;
}
function hexToBt64(hex) {
var binary = "";
for (var i = 0; i < 16; i++) {
binary += hexToBt4(hex.substring(i, i + 1));
}
return binary;
}
/*
* the 64 bit des core arithmetic
*/
function enc(dataByte, keyByte) {
var keys = generateKeys(keyByte);
var ipByte = initPermute(dataByte);
var ipLeft = new Array(32);
var ipRight = new Array(32);
var tempLeft = new Array(32);
var i = 0, j = 0, k = 0, m = 0, n = 0;
for (k = 0; k < 32; k++) {
ipLeft[k] = ipByte[k];
ipRight[k] = ipByte[32 + k];
}
for (i = 0; i < 16; i++) {
for (j = 0; j < 32; j++) {
tempLeft[j] = ipLeft[j];
ipLeft[j] = ipRight[j];
}
var key = new Array(48);
for (m = 0; m < 48; m++) {
key[m] = keys[i][m];
}
var tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight), key))), tempLeft);
for (n = 0; n < 32; n++) {
ipRight[n] = tempRight[n];
}
}
var finalData = new Array(64);
for (i = 0; i < 32; i++) {
finalData[i] = ipRight[i];
finalData[32 + i] = ipLeft[i];
}
return finallyPermute(finalData);
}
function dec(dataByte, keyByte) {
var keys = generateKeys(keyByte);
var ipByte = initPermute(dataByte);
var ipLeft = new Array(32);
var ipRight = new Array(32);
var tempLeft = new Array(32);
var i = 0, j = 0, k = 0, m = 0, n = 0;
for (k = 0; k < 32; k++) {
ipLeft[k] = ipByte[k];
ipRight[k] = ipByte[32 + k];
}
for (i = 15; i >= 0; i--) {
for (j = 0; j < 32; j++) {
tempLeft[j] = ipLeft[j];
ipLeft[j] = ipRight[j];
}
var key = new Array(48);
for (m = 0; m < 48; m++) {
key[m] = keys[i][m];
}
var tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight), key))), tempLeft);
for (n = 0; n < 32; n++) {
ipRight[n] = tempRight[n];
}
}
var finalData = new Array(64);
for (i = 0; i < 32; i++) {
finalData[i] = ipRight[i];
finalData[32 + i] = ipLeft[i];
}
return finallyPermute(finalData);
}
function initPermute(originalData) {
var ipByte = new Array(64);
for (var i = 0, m = 1, n = 0; i < 4; i++ , m += 2, n += 2) {
for (var j = 7, k = 0; j >= 0; j-- , k++) {
ipByte[i * 8 + k] = originalData[j * 8 + m];
ipByte[i * 8 + k + 32] = originalData[j * 8 + n];
}
}
return ipByte;
}
function expandPermute(rightData) {
var epByte = new Array(48);
for (var i = 0; i < 8; i++) {
if (i == 0) {
epByte[i * 6 + 0] = rightData[31];
} else {
epByte[i * 6 + 0] = rightData[i * 4 - 1];
}
epByte[i * 6 + 1] = rightData[i * 4 + 0];
epByte[i * 6 + 2] = rightData[i * 4 + 1];
epByte[i * 6 + 3] = rightData[i * 4 + 2];
epByte[i * 6 + 4] = rightData[i * 4 + 3];
if (i == 7) {
epByte[i * 6 + 5] = rightData[0];
} else {
epByte[i * 6 + 5] = rightData[i * 4 + 4];
}
}
return epByte;
}
function xor(byteOne, byteTwo) {
var xorByte = new Array(byteOne.length);
for (var i = 0; i < byteOne.length; i++) {
xorByte[i] = byteOne[i] ^ byteTwo[i];
}
return xorByte;
}
function sBoxPermute(expandByte) {
var sBoxByte = new Array(32);
var binary = "";
var s1 = [
[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7],
[0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8],
[4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0],
[15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13]];
/* Table - s2 */
var s2 = [
[15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10],
[3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5],
[0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15],
[13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9]];
/* Table - s3 */
var s3 = [
[10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8],
[13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1],
[13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7],
[1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12]];
/* Table - s4 */
var s4 = [
[7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15],
[13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9],
[10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4],
[3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14]];
/* Table - s5 */
var s5 = [
[2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9],
[14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6],
[4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14],
[11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3]];
/* Table - s6 */
var s6 = [
[12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11],
[10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8],
[9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6],
[4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13]];
/* Table - s7 */
var s7 = [
[4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1],
[13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6],
[1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2],
[6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12]];
/* Table - s8 */
var s8 = [
[13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7],
[1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2],
[7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8],
[2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11]];
for (var m = 0; m < 8; m++) {
var i = 0, j = 0;
i = expandByte[m * 6 + 0] * 2 + expandByte[m * 6 + 5];
j = expandByte[m * 6 + 1] * 2 * 2 * 2
+ expandByte[m * 6 + 2] * 2 * 2
+ expandByte[m * 6 + 3] * 2
+ expandByte[m * 6 + 4];
switch (m) {
case 0:
binary = getBoxBinary(s1[i][j]);
break;
case 1:
binary = getBoxBinary(s2[i][j]);
break;
case 2:
binary = getBoxBinary(s3[i][j]);
break;
case 3:
binary = getBoxBinary(s4[i][j]);
break;
case 4:
binary = getBoxBinary(s5[i][j]);
break;
case 5:
binary = getBoxBinary(s6[i][j]);
break;
case 6:
binary = getBoxBinary(s7[i][j]);
break;
case 7:
binary = getBoxBinary(s8[i][j]);
break;
}
sBoxByte[m * 4 + 0] = parseInt(binary.substring(0, 1));
sBoxByte[m * 4 + 1] = parseInt(binary.substring(1, 2));
sBoxByte[m * 4 + 2] = parseInt(binary.substring(2, 3));
sBoxByte[m * 4 + 3] = parseInt(binary.substring(3, 4));
}
return sBoxByte;
}
function pPermute(sBoxByte) {
var pBoxPermute = new Array(32);
pBoxPermute[0] = sBoxByte[15];
pBoxPermute[1] = sBoxByte[6];
pBoxPermute[2] = sBoxByte[19];
pBoxPermute[3] = sBoxByte[20];
pBoxPermute[4] = sBoxByte[28];
pBoxPermute[5] = sBoxByte[11];
pBoxPermute[6] = sBoxByte[27];
pBoxPermute[7] = sBoxByte[16];
pBoxPermute[8] = sBoxByte[0];
pBoxPermute[9] = sBoxByte[14];
pBoxPermute[10] = sBoxByte[22];
pBoxPermute[11] = sBoxByte[25];
pBoxPermute[12] = sBoxByte[4];
pBoxPermute[13] = sBoxByte[17];
pBoxPermute[14] = sBoxByte[30];
pBoxPermute[15] = sBoxByte[9];
pBoxPermute[16] = sBoxByte[1];
pBoxPermute[17] = sBoxByte[7];
pBoxPermute[18] = sBoxByte[23];
pBoxPermute[19] = sBoxByte[13];
pBoxPermute[20] = sBoxByte[31];
pBoxPermute[21] = sBoxByte[26];
pBoxPermute[22] = sBoxByte[2];
pBoxPermute[23] = sBoxByte[8];
pBoxPermute[24] = sBoxByte[18];
pBoxPermute[25] = sBoxByte[12];
pBoxPermute[26] = sBoxByte[29];
pBoxPermute[27] = sBoxByte[5];
pBoxPermute[28] = sBoxByte[21];
pBoxPermute[29] = sBoxByte[10];
pBoxPermute[30] = sBoxByte[3];
pBoxPermute[31] = sBoxByte[24];
return pBoxPermute;
}
function finallyPermute(endByte) {
var fpByte = new Array(64);
fpByte[0] = endByte[39];
fpByte[1] = endByte[7];
fpByte[2] = endByte[47];
fpByte[3] = endByte[15];
fpByte[4] = endByte[55];
fpByte[5] = endByte[23];
fpByte[6] = endByte[63];
fpByte[7] = endByte[31];
fpByte[8] = endByte[38];
fpByte[9] = endByte[6];
fpByte[10] = endByte[46];
fpByte[11] = endByte[14];
fpByte[12] = endByte[54];
fpByte[13] = endByte[22];
fpByte[14] = endByte[62];
fpByte[15] = endByte[30];
fpByte[16] = endByte[37];
fpByte[17] = endByte[5];
fpByte[18] = endByte[45];
fpByte[19] = endByte[13];
fpByte[20] = endByte[53];
fpByte[21] = endByte[21];
fpByte[22] = endByte[61];
fpByte[23] = endByte[29];
fpByte[24] = endByte[36];
fpByte[25] = endByte[4];
fpByte[26] = endByte[44];
fpByte[27] = endByte[12];
fpByte[28] = endByte[52];
fpByte[29] = endByte[20];
fpByte[30] = endByte[60];
fpByte[31] = endByte[28];
fpByte[32] = endByte[35];
fpByte[33] = endByte[3];
fpByte[34] = endByte[43];
fpByte[35] = endByte[11];
fpByte[36] = endByte[51];
fpByte[37] = endByte[19];
fpByte[38] = endByte[59];
fpByte[39] = endByte[27];
fpByte[40] = endByte[34];
fpByte[41] = endByte[2];
fpByte[42] = endByte[42];
fpByte[43] = endByte[10];
fpByte[44] = endByte[50];
fpByte[45] = endByte[18];
fpByte[46] = endByte[58];
fpByte[47] = endByte[26];
fpByte[48] = endByte[33];
fpByte[49] = endByte[1];
fpByte[50] = endByte[41];
fpByte[51] = endByte[9];
fpByte[52] = endByte[49];
fpByte[53] = endByte[17];
fpByte[54] = endByte[57];
fpByte[55] = endByte[25];
fpByte[56] = endByte[32];
fpByte[57] = endByte[0];
fpByte[58] = endByte[40];
fpByte[59] = endByte[8];
fpByte[60] = endByte[48];
fpByte[61] = endByte[16];
fpByte[62] = endByte[56];
fpByte[63] = endByte[24];
return fpByte;
}
function getBoxBinary(i) {
var binary = "";
switch (i) {
case 0: binary = "0000"; break;
case 1: binary = "0001"; break;
case 2: binary = "0010"; break;
case 3: binary = "0011"; break;
case 4: binary = "0100"; break;
case 5: binary = "0101"; break;
case 6: binary = "0110"; break;
case 7: binary = "0111"; break;
case 8: binary = "1000"; break;
case 9: binary = "1001"; break;
case 10: binary = "1010"; break;
case 11: binary = "1011"; break;
case 12: binary = "1100"; break;
case 13: binary = "1101"; break;
case 14: binary = "1110"; break;
case 15: binary = "1111"; break;
}
return binary;
}
/*
* generate 16 keys for xor
*
*/
function generateKeys(keyByte) {
var key = new Array(56);
var keys = new Array();
keys[0] = new Array();
keys[1] = new Array();
keys[2] = new Array();
keys[3] = new Array();
keys[4] = new Array();
keys[5] = new Array();
keys[6] = new Array();
keys[7] = new Array();
keys[8] = new Array();
keys[9] = new Array();
keys[10] = new Array();
keys[11] = new Array();
keys[12] = new Array();
keys[13] = new Array();
keys[14] = new Array();
keys[15] = new Array();
var loop = [1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1];
for (var i = 0; i < 7; i++) {
for (var j = 0, k = 7; j < 8; j++ , k--) {
key[i * 8 + j] = keyByte[8 * k + i];
}
}
var i = 0;
for (i = 0; i < 16; i++) {
var tempLeft = 0;
var tempRight = 0;
for (j = 0; j < loop[i]; j++) {
tempLeft = key[0];
tempRight = key[28];
for (k = 0; k < 27; k++) {
key[k] = key[k + 1];
key[28 + k] = key[29 + k];
}
key[27] = tempLeft;
key[55] = tempRight;
}
var tempKey = new Array(48);
tempKey[0] = key[13];
tempKey[1] = key[16];
tempKey[2] = key[10];
tempKey[3] = key[23];
tempKey[4] = key[0];
tempKey[5] = key[4];
tempKey[6] = key[2];
tempKey[7] = key[27];
tempKey[8] = key[14];
tempKey[9] = key[5];
tempKey[10] = key[20];
tempKey[11] = key[9];
tempKey[12] = key[22];
tempKey[13] = key[18];
tempKey[14] = key[11];
tempKey[15] = key[3];
tempKey[16] = key[25];
tempKey[17] = key[7];
tempKey[18] = key[15];
tempKey[19] = key[6];
tempKey[20] = key[26];
tempKey[21] = key[19];
tempKey[22] = key[12];
tempKey[23] = key[1];
tempKey[24] = key[40];
tempKey[25] = key[51];
tempKey[26] = key[30];
tempKey[27] = key[36];
tempKey[28] = key[46];
tempKey[29] = key[54];
tempKey[30] = key[29];
tempKey[31] = key[39];
tempKey[32] = key[50];
tempKey[33] = key[44];
tempKey[34] = key[32];
tempKey[35] = key[47];
tempKey[36] = key[43];
tempKey[37] = key[48];
tempKey[38] = key[38];
tempKey[39] = key[55];
tempKey[40] = key[33];
tempKey[41] = key[52];
tempKey[42] = key[45];
tempKey[43] = key[41];
tempKey[44] = key[49];
tempKey[45] = key[35];
tempKey[46] = key[28];
tempKey[47] = key[31];
var m = 0;
switch (i) {
case 0: for (m = 0; m < 48; m++) { keys[0][m] = tempKey[m]; } break;
case 1: for (m = 0; m < 48; m++) { keys[1][m] = tempKey[m]; } break;
case 2: for (m = 0; m < 48; m++) { keys[2][m] = tempKey[m]; } break;
case 3: for (m = 0; m < 48; m++) { keys[3][m] = tempKey[m]; } break;
case 4: for (m = 0; m < 48; m++) { keys[4][m] = tempKey[m]; } break;
case 5: for (m = 0; m < 48; m++) { keys[5][m] = tempKey[m]; } break;
case 6: for (m = 0; m < 48; m++) { keys[6][m] = tempKey[m]; } break;
case 7: for (m = 0; m < 48; m++) { keys[7][m] = tempKey[m]; } break;
case 8: for (m = 0; m < 48; m++) { keys[8][m] = tempKey[m]; } break;
case 9: for (m = 0; m < 48; m++) { keys[9][m] = tempKey[m]; } break;
case 10: for (m = 0; m < 48; m++) { keys[10][m] = tempKey[m]; } break;
case 11: for (m = 0; m < 48; m++) { keys[11][m] = tempKey[m]; } break;
case 12: for (m = 0; m < 48; m++) { keys[12][m] = tempKey[m]; } break;
case 13: for (m = 0; m < 48; m++) { keys[13][m] = tempKey[m]; } break;
case 14: for (m = 0; m < 48; m++) { keys[14][m] = tempKey[m]; } break;
case 15: for (m = 0; m < 48; m++) { keys[15][m] = tempKey[m]; } break;
}
}
return keys;
}
function encryptString(encStr) {
return strEnc(encStr, '$QBOSSY$', '$QBOSSY$', '$QBOSSY$')
}
function decryptString(decStr) {
return strDec(decStr, '$QBOSSY$', '$QBOSSY$', '$QBOSSY$');
}
module.exports = {
encryptString: encryptString,
decryptString: decryptString
}
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