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twofish.js
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twofish.js
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/*globals exports*/
(function twofish(exports) {
'use strict';
var RNG = function RNG(seed) {
this.m = 0x80000000; // 2**31;
this.a = 1103515245;
this.c = 12345;
this.state = seed ? seed : Math.floor(Math.random() * (this.m - 1));
}
, functionUtils = function functionUtils() {
var isAnArray = function isAnArray(someVar) {
if (Array.isArray(someVar) ||
Object.prototype.toString.call( someVar ) === '[object Uint8Array]') {
return true;
}
return false;
}
, areEqual = function areEqual(first, second) {
var firstLength = first.length
, secondLength = second.length
, diffLength
, arraysEqualLenghtIndex = 0;
if (firstLength > secondLength) {
diffLength = firstLength - secondLength;
for (; diffLength >= 0; diffLength -= 1) {
if (first[firstLength - diffLength]) {
return false;
}
}
} else if (secondLength > firstLength) {
diffLength = secondLength - firstLength;
for (; diffLength >= 0; diffLength -= 1) {
if (second[secondLength - diffLength]) {
return false;
}
}
}
for (; arraysEqualLenghtIndex < firstLength; arraysEqualLenghtIndex += 1) {
if (first[arraysEqualLenghtIndex] !== second[arraysEqualLenghtIndex]) {
return false;
}
}
return true;
}
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Base64_encoding_and_decoding
, UTF8ArrToStr = function UTF8ArrToStr(aBytes) {
var sView = ''
, nPart
, nLen = aBytes.length
, nIdx = 0;
for (; nIdx < nLen; nIdx += 1) {
nPart = aBytes[nIdx];
/*eslint-disable no-plusplus, no-nested-ternary, no-bitwise*/
sView += String.fromCharCode(
nPart > 251 && nPart < 254 && nIdx + 5 < nLen ? /* six bytes */
/* (nPart - 252 << 32) is not possible in ECMAScript! So...: */
(nPart - 252) * 1073741824 + (aBytes[++nIdx] - 128 << 24) + (aBytes[++nIdx] - 128 << 18) + (aBytes[++nIdx] - 128 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128
: nPart > 247 && nPart < 252 && nIdx + 4 < nLen ? /* five bytes */
(nPart - 248 << 24) + (aBytes[++nIdx] - 128 << 18) + (aBytes[++nIdx] - 128 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128
: nPart > 239 && nPart < 248 && nIdx + 3 < nLen ? /* four bytes */
(nPart - 240 << 18) + (aBytes[++nIdx] - 128 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128
: nPart > 223 && nPart < 240 && nIdx + 2 < nLen ? /* three bytes */
(nPart - 224 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128
: nPart > 191 && nPart < 224 && nIdx + 1 < nLen ? /* two bytes */
(nPart - 192 << 6) + aBytes[++nIdx] - 128
: /* nPart < 127 ? */ /* one byte */
nPart
);
/*eslint-enable no-plusplus, no-nested-ternary, no-bitwise*/
}
return sView;
}
, strToUTF8Arr = function strToUTF8Arr(sDOMStr) {
var aBytes
, nChr
, nStrLen = sDOMStr.length
, nArrLen = 0
, nMapIdx = 0
, nIdx = 0
, nChrIdx = 0
, paddingValue
, paddingIndex;
/* mapping... */
for (; nMapIdx < nStrLen; nMapIdx += 1) {
nChr = sDOMStr.charCodeAt(nMapIdx);
/*eslint-disable no-nested-ternary*/
nArrLen += nChr < 0x80 ? 1 : nChr < 0x800 ? 2 : nChr < 0x10000 ? 3 : nChr < 0x200000 ? 4 : nChr < 0x4000000 ? 5 : 6;
/*eslint-enable no-nested-ternary*/
}
aBytes = [];
/* transcription... */
for (; nIdx < nArrLen; nChrIdx += 1) {
nChr = sDOMStr.charCodeAt(nChrIdx);
/*eslint-disable no-plusplus, no-bitwise*/
if (nChr < 128) {
/* one byte */
aBytes[nIdx++] = nChr;
} else if (nChr < 0x800) {
/* two bytes */
aBytes[nIdx++] = 192 + (nChr >>> 6);
aBytes[nIdx++] = 128 + (nChr & 63);
} else if (nChr < 0x10000) {
/* three bytes */
aBytes[nIdx++] = 224 + (nChr >>> 12);
aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
aBytes[nIdx++] = 128 + (nChr & 63);
} else if (nChr < 0x200000) {
/* four bytes */
aBytes[nIdx++] = 240 + (nChr >>> 18);
aBytes[nIdx++] = 128 + (nChr >>> 12 & 63);
aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
aBytes[nIdx++] = 128 + (nChr & 63);
} else if (nChr < 0x4000000) {
/* five bytes */
aBytes[nIdx++] = 248 + (nChr >>> 24);
aBytes[nIdx++] = 128 + (nChr >>> 18 & 63);
aBytes[nIdx++] = 128 + (nChr >>> 12 & 63);
aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
aBytes[nIdx++] = 128 + (nChr & 63);
} else {
/* six bytes */
aBytes[nIdx++] = 252 + nChr / 1073741824;
aBytes[nIdx++] = 128 + (nChr >>> 24 & 63);
aBytes[nIdx++] = 128 + (nChr >>> 18 & 63);
aBytes[nIdx++] = 128 + (nChr >>> 12 & 63);
aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
aBytes[nIdx++] = 128 + (nChr & 63);
}
/*eslint-enable no-plusplus, no-bitwise*/
}
paddingValue = aBytes.length % 16;
if (paddingValue !== 0) {
for (paddingIndex = 0; paddingIndex < 16 - paddingValue; paddingIndex += 1) {
aBytes.push(0);
}
}
return aBytes;
};
return {
'isAnArray': isAnArray,
'areEqual': areEqual,
'UTF8ArrToStr': UTF8ArrToStr,
'strToUTF8Arr': strToUTF8Arr
};
};
RNG.prototype.nextInt = function nextInt() {
this.state = (this.a * this.state + this.c) % this.m;
return this.state;
};
RNG.prototype.nextByte = function nextByte() {
this.state = ((this.a * this.state + this.c) >> 16) & 0x7FFF;
return this.state;
}
RNG.prototype.nextFloat = function nextFloat() {
// returns in range [0,1]
return this.nextInt() / (this.m - 1);
};
RNG.prototype.nextRange = function nextRange(start, end) {
// returns in range [start, end): including start, excluding end
// can't modulo nextInt because of weak randomness in lower bits
var rangeSize = end - start
, randomUnder1 = this.nextInt() / this.m;
return start + Math.floor(randomUnder1 * rangeSize);
};
RNG.prototype.choice = function choice(array) {
return array[this.nextRange(0, array.length)];
};
exports.rand = RNG;
/* eslint-disable no-shadow */
exports.twofish = function twofish(IV, seed) {
/* eslint-enable no-shadow */
/* eslint-disable no-bitwise*/
var utils = functionUtils()
, rng = new RNG(seed)
, initializingVector = []
// S-boxes
, P0 = new Uint8Array([
0xA9, 0x67, 0xB3, 0xE8,
0x04, 0xFD, 0xA3, 0x76,
0x9A, 0x92, 0x80, 0x78,
0xE4, 0xDD, 0xD1, 0x38,
0x0D, 0xC6, 0x35, 0x98,
0x18, 0xF7, 0xEC, 0x6C,
0x43, 0x75, 0x37, 0x26,
0xFA, 0x13, 0x94, 0x48,
0xF2, 0xD0, 0x8B, 0x30,
0x84, 0x54, 0xDF, 0x23,
0x19, 0x5B, 0x3D, 0x59,
0xF3, 0xAE, 0xA2, 0x82,
0x63, 0x01, 0x83, 0x2E,
0xD9, 0x51, 0x9B, 0x7C,
0xA6, 0xEB, 0xA5, 0xBE,
0x16, 0x0C, 0xE3, 0x61,
0xC0, 0x8C, 0x3A, 0xF5,
0x73, 0x2C, 0x25, 0x0B,
0xBB, 0x4E, 0x89, 0x6B,
0x53, 0x6A, 0xB4, 0xF1,
0xE1, 0xE6, 0xBD, 0x45,
0xE2, 0xF4, 0xB6, 0x66,
0xCC, 0x95, 0x03, 0x56,
0xD4, 0x1C, 0x1E, 0xD7,
0xFB, 0xC3, 0x8E, 0xB5,
0xE9, 0xCF, 0xBF, 0xBA,
0xEA, 0x77, 0x39, 0xAF,
0x33, 0xC9, 0x62, 0x71,
0x81, 0x79, 0x09, 0xAD,
0x24, 0xCD, 0xF9, 0xD8,
0xE5, 0xC5, 0xB9, 0x4D,
0x44, 0x08, 0x86, 0xE7,
0xA1, 0x1D, 0xAA, 0xED,
0x06, 0x70, 0xB2, 0xD2,
0x41, 0x7B, 0xA0, 0x11,
0x31, 0xC2, 0x27, 0x90,
0x20, 0xF6, 0x60, 0xFF,
0x96, 0x5C, 0xB1, 0xAB,
0x9E, 0x9C, 0x52, 0x1B,
0x5F, 0x93, 0x0A, 0xEF,
0x91, 0x85, 0x49, 0xEE,
0x2D, 0x4F, 0x8F, 0x3B,
0x47, 0x87, 0x6D, 0x46,
0xD6, 0x3E, 0x69, 0x64,
0x2A, 0xCE, 0xCB, 0x2F,
0xFC, 0x97, 0x05, 0x7A,
0xAC, 0x7F, 0xD5, 0x1A,
0x4B, 0x0E, 0xA7, 0x5A,
0x28, 0x14, 0x3F, 0x29,
0x88, 0x3C, 0x4C, 0x02,
0xB8, 0xDA, 0xB0, 0x17,
0x55, 0x1F, 0x8A, 0x7D,
0x57, 0xC7, 0x8D, 0x74,
0xB7, 0xC4, 0x9F, 0x72,
0x7E, 0x15, 0x22, 0x12,
0x58, 0x07, 0x99, 0x34,
0x6E, 0x50, 0xDE, 0x68,
0x65, 0xBC, 0xDB, 0xF8,
0xC8, 0xA8, 0x2B, 0x40,
0xDC, 0xFE, 0x32, 0xA4,
0xCA, 0x10, 0x21, 0xF0,
0xD3, 0x5D, 0x0F, 0x00,
0x6F, 0x9D, 0x36, 0x42,
0x4A, 0x5E, 0xC1, 0xE0
])
, P1 = new Uint8Array([
0x75, 0xF3, 0xC6, 0xF4,
0xDB, 0x7B, 0xFB, 0xC8,
0x4A, 0xD3, 0xE6, 0x6B,
0x45, 0x7D, 0xE8, 0x4B,
0xD6, 0x32, 0xD8, 0xFD,
0x37, 0x71, 0xF1, 0xE1,
0x30, 0x0F, 0xF8, 0x1B,
0x87, 0xFA, 0x06, 0x3F,
0x5E, 0xBA, 0xAE, 0x5B,
0x8A, 0x00, 0xBC, 0x9D,
0x6D, 0xC1, 0xB1, 0x0E,
0x80, 0x5D, 0xD2, 0xD5,
0xA0, 0x84, 0x07, 0x14,
0xB5, 0x90, 0x2C, 0xA3,
0xB2, 0x73, 0x4C, 0x54,
0x92, 0x74, 0x36, 0x51,
0x38, 0xB0, 0xBD, 0x5A,
0xFC, 0x60, 0x62, 0x96,
0x6C, 0x42, 0xF7, 0x10,
0x7C, 0x28, 0x27, 0x8C,
0x13, 0x95, 0x9C, 0xC7,
0x24, 0x46, 0x3B, 0x70,
0xCA, 0xE3, 0x85, 0xCB,
0x11, 0xD0, 0x93, 0xB8,
0xA6, 0x83, 0x20, 0xFF,
0x9F, 0x77, 0xC3, 0xCC,
0x03, 0x6F, 0x08, 0xBF,
0x40, 0xE7, 0x2B, 0xE2,
0x79, 0x0C, 0xAA, 0x82,
0x41, 0x3A, 0xEA, 0xB9,
0xE4, 0x9A, 0xA4, 0x97,
0x7E, 0xDA, 0x7A, 0x17,
0x66, 0x94, 0xA1, 0x1D,
0x3D, 0xF0, 0xDE, 0xB3,
0x0B, 0x72, 0xA7, 0x1C,
0xEF, 0xD1, 0x53, 0x3E,
0x8F, 0x33, 0x26, 0x5F,
0xEC, 0x76, 0x2A, 0x49,
0x81, 0x88, 0xEE, 0x21,
0xC4, 0x1A, 0xEB, 0xD9,
0xC5, 0x39, 0x99, 0xCD,
0xAD, 0x31, 0x8B, 0x01,
0x18, 0x23, 0xDD, 0x1F,
0x4E, 0x2D, 0xF9, 0x48,
0x4F, 0xF2, 0x65, 0x8E,
0x78, 0x5C, 0x58, 0x19,
0x8D, 0xE5, 0x98, 0x57,
0x67, 0x7F, 0x05, 0x64,
0xAF, 0x63, 0xB6, 0xFE,
0xF5, 0xB7, 0x3C, 0xA5,
0xCE, 0xE9, 0x68, 0x44,
0xE0, 0x4D, 0x43, 0x69,
0x29, 0x2E, 0xAC, 0x15,
0x59, 0xA8, 0x0A, 0x9E,
0x6E, 0x47, 0xDF, 0x34,
0x35, 0x6A, 0xCF, 0xDC,
0x22, 0xC9, 0xC0, 0x9B,
0x89, 0xD4, 0xED, 0xAB,
0x12, 0xA2, 0x0D, 0x52,
0xBB, 0x02, 0x2F, 0xA9,
0xD7, 0x61, 0x1E, 0xB4,
0x50, 0x04, 0xF6, 0xC2,
0x16, 0x25, 0x86, 0x56,
0x55, 0x09, 0xBE, 0x91
])
, P = [P0, P1]
, BLOCK_SIZE = 16
, ROUNDS = 16
, SK_STEP = 0x02020202
, SK_BUMP = 0x01010101
, SK_ROTL = 9
, INPUT_WHITEN = 0
, OUTPUT_WHITEN = INPUT_WHITEN + BLOCK_SIZE / 4
, ROUND_SUBKEYS = OUTPUT_WHITEN + BLOCK_SIZE / 4 // 2*(# rounds)
, blockSizeIndex = 0
, paddingIndex = 0
, initialLength
// Fixed p0/p1 permutations used in S-box lookup.
// Change the following constant definitions, then S-boxes will automatically get changed.
, P_00 = 1
, P_01 = 0
, P_02 = 0
, P_03 = P_01 ^ 1
, P_04 = 1
, P_10 = 0
, P_11 = 0
, P_12 = 1
, P_13 = P_11 ^ 1
, P_14 = 0
, P_20 = 1
, P_21 = 1
, P_22 = 0
, P_23 = P_21 ^ 1
, P_24 = 0
, P_30 = 0
, P_31 = 1
, P_32 = 1
, P_33 = P_31 ^ 1
, P_34 = 1
, GF256_FDBK_2 = Math.floor(0x169 / 2)
, GF256_FDBK_4 = Math.floor(0x169 / 4)
, RS_GF_FDBK = 0x14D
, lfsr1 = function lfsr1(x) {
return x >> 1 ^ ((x & 0x01) !== 0 ? GF256_FDBK_2 : 0);
}
, lfsr2 = function lfsr2(x) {
return x >> 2 ^ ((x & 0x02) !== 0 ? GF256_FDBK_2 : 0) ^ ((x & 0x01) !== 0 ? GF256_FDBK_4 : 0);
}
, mxX = function mxX(x) {
return x ^ lfsr2(x);
}
, mxY = function mxY(x) {
return x ^ lfsr1(x) ^ lfsr2(x);
}
, MDS = (function calcMDS() {
var localMDS = [[], [], [], []]
, m1 = []
, mX = []
, mY = []
, i
, j;
for (i = 0; i < 256; i += 1) {
j = P[0][i] & 0xFF;
m1[0] = j;
mX[0] = mxX(j) & 0xFF;
mY[0] = mxY(j) & 0xFF;
j = P[1][i] & 0xFF;
m1[1] = j;
mX[1] = mxX(j) & 0xFF;
mY[1] = mxY(j) & 0xFF;
localMDS[0][i] = m1[P_00] << 0 | mX[P_00] << 8 | mY[P_00] << 16 | mY[P_00] << 24;
localMDS[1][i] = mY[P_10] << 0 | mY[P_10] << 8 | mX[P_10] << 16 | m1[P_10] << 24;
localMDS[2][i] = mX[P_20] << 0 | mY[P_20] << 8 | m1[P_20] << 16 | mY[P_20] << 24;
localMDS[3][i] = mX[P_30] << 0 | m1[P_30] << 8 | mY[P_30] << 16 | mX[P_30] << 24;
}
return [new Uint32Array(localMDS[0]), new Uint32Array(localMDS[1]), new Uint32Array(localMDS[2]), new Uint32Array(localMDS[3])];
}())
, b0 = function b0(x) {
return x & 0xFF;
}
, b1 = function b1(x) {
return x >>> 8 & 0xFF;
}
, b2 = function b2(x) {
return x >>> 16 & 0xFF;
}
, b3 = function b3(x) {
return x >>> 24 & 0xFF;
}
, chooseB = function chooseB(x, N) {
var result = 0;
switch (N % 4) {
case 0:
result = b0(x);
break;
case 1:
result = b1(x);
break;
case 2:
result = b2(x);
break;
case 3:
result = b3(x);
break;
default:
}
return result;
}
, rsRem = function rsRem(x) {
var b = x >>> 24 & 0xFF
, g2 = (b << 1 ^ ((b & 0x80) !== 0 ? RS_GF_FDBK : 0)) & 0xFF
, g3 = b >>> 1 ^ ((b & 0x01) !== 0 ? RS_GF_FDBK >>> 1 : 0 ) ^ g2
, result = x << 8 ^ g3 << 24 ^ g2 << 16 ^ g3 << 8 ^ b;
return result;
}
, rsMDSEncode = function rsMDSEncode(k0, k1) {
var index = 0;
for (; index < 4; index += 1) {
k1 = rsRem(k1);
}
k1 ^= k0;
for (index = 0; index < 4; index += 1) {
k1 = rsRem(k1);
}
return k1;
}
, f32 = function f32(k64Cnt, x, k32 ) {
var lB0 = b0(x)
, lB1 = b1(x)
, lB2 = b2(x)
, lB3 = b3(x)
, k0 = k32[0] || 0
, k1 = k32[1] || 0
, k2 = k32[2] || 0
, k3 = k32[3] || 0
, result = 0;
switch (k64Cnt & 3) {
case 1:
result = MDS[0][P[P_01][lB0] & 0xFF ^ b0(k0)] ^
MDS[1][P[P_11][lB1] & 0xFF ^ b1(k0)] ^
MDS[2][P[P_21][lB2] & 0xFF ^ b2(k0)] ^
MDS[3][P[P_31][lB3] & 0xFF ^ b3(k0)];
break;
case 0: // same as 4
lB0 = P[P_04][lB0] & 0xFF ^ b0(k3);
lB1 = P[P_14][lB1] & 0xFF ^ b1(k3);
lB2 = P[P_24][lB2] & 0xFF ^ b2(k3);
lB3 = P[P_34][lB3] & 0xFF ^ b3(k3);
/* falls through */
case 3:
lB0 = P[P_03][lB0] & 0xFF ^ b0(k2);
lB1 = P[P_13][lB1] & 0xFF ^ b1(k2);
lB2 = P[P_23][lB2] & 0xFF ^ b2(k2);
lB3 = P[P_33][lB3] & 0xFF ^ b3(k2);
/* falls through */
case 2:
result = MDS[0][P[P_01][P[P_02][lB0] & 0xFF ^ b0(k1)] & 0xFF ^ b0(k0)] ^
MDS[1][P[P_11][P[P_12][lB1] & 0xFF ^ b1(k1)] & 0xFF ^ b1(k0)] ^
MDS[2][P[P_21][P[P_22][lB2] & 0xFF ^ b2(k1)] & 0xFF ^ b2(k0)] ^
MDS[3][P[P_31][P[P_32][lB3] & 0xFF ^ b3(k1)] & 0xFF ^ b3(k0)];
break;
default:
}
return result;
}
, fe32 = function fe32(sBox, x, R) {
var toReturn = sBox[2 * chooseB(x, R)] ^
sBox[2 * chooseB(x, R + 1) + 1] ^
sBox[0x200 + 2 * chooseB(x, R + 2)] ^
sBox[0x200 + 2 * chooseB(x, R + 3) + 1];
return new Uint32Array([toReturn])[0];
}
, xorBuffers = function xorBuffers(a, b) {
var res = []
, index = 0;
if (a &&
b &&
utils.isAnArray(a) &&
utils.isAnArray(b) &&
a.length !== b.length) {
throw 'Buffer length must be equal';
}
a = new Uint8Array(a);
b = new Uint8Array(b);
for (index = 0; index < a.length; index += 1) {
res[index] = (a[index] ^ b[index]) & 0xFF;
}
return new Uint8Array(res);
}
, makeKey = function makeKey(aKey) {
if (aKey &&
utils.isAnArray(aKey)) {
var keyLenght = aKey.length
, tmpKey = []
, index = 0
, nValue
, limitedKey
, k64Cnt = keyLenght / 8
, subkeyCnt = ROUND_SUBKEYS + 2 * ROUNDS
, k32e = []
, k32o = []
, sBoxKey = []
, i
, j
, offset = 0
, q
, A
, B
, subKeys = []
, lB0
, lB1
, lB2
, lB3
, sBox = []
, k0
, k1
, k2
, k3;
if (keyLenght < 8 ||
keyLenght > 8 && keyLenght < 16 ||
keyLenght > 16 && keyLenght < 24 ||
keyLenght > 24 && keyLenght < 32) {
for (index = 0; index < aKey.length + (8 - aKey.length); index += 1) {
nValue = aKey[index];
if (nValue !== undefined) {
tmpKey.push(nValue);
} else {
tmpKey.push(0x00);
}
}
aKey = tmpKey;
} else if (keyLenght > 32) {
limitedKey = [];
for (index = 0; index < 32; index += 1) {
limitedKey.push(aKey[index]);
}
aKey = limitedKey;
}
aKey = new Uint8Array(aKey);
keyLenght = aKey.length;
for (i = 0, j = k64Cnt - 1; i < 4 && offset < keyLenght; i += 1, j -= 1) {
/*eslint-disable no-plusplus*/
k32e[i] = aKey[offset++] & 0xFF | (aKey[offset++] & 0xFF) << 8 | (aKey[offset++] & 0xFF) << 16 | (aKey[offset++] & 0xFF) << 24;
k32o[i] = aKey[offset++] & 0xFF | (aKey[offset++] & 0xFF) << 8 | (aKey[offset++] & 0xFF) << 16 | (aKey[offset++] & 0xFF) << 24;
/*eslint-enable no-plusplus*/
sBoxKey[j] = rsMDSEncode(k32e[i], k32o[i]);
}
for (i = q = 0; i < subkeyCnt / 2; i += 1, q += SK_STEP) {
A = f32(k64Cnt, q, k32e);
B = f32(k64Cnt, q + SK_BUMP, k32o);
B = B << 8 | B >>> 24;
A += B;
subKeys[2 * i] = A;
A += B;
subKeys[2 * i + 1] = A << SK_ROTL | A >>> 32 - SK_ROTL;
}
k0 = sBoxKey[0];
k1 = sBoxKey[1];
k2 = sBoxKey[2];
k3 = sBoxKey[3];
for (i = 0; i < 256; i += 1) {
lB0 = lB1 = lB2 = lB3 = i;
switch (k64Cnt & 3) {
case 1:
sBox[2 * i] = MDS[0][P[P_01][lB0] & 0xFF ^ b0(k0)];
sBox[2 * i + 1] = MDS[1][P[P_11][lB1] & 0xFF ^ b1(k0)];
sBox[0x200 + 2 * i] = MDS[2][P[P_21][lB2] & 0xFF ^ b2(k0)];
sBox[0x200 + 2 * i + 1] = MDS[3][P[P_31][lB3] & 0xFF ^ b3(k0)];
break;
case 0:
lB0 = P[P_04][lB0] & 0xFF ^ b0(k3);
lB1 = P[P_14][lB1] & 0xFF ^ b1(k3);
lB2 = P[P_24][lB2] & 0xFF ^ b2(k3);
lB3 = P[P_34][lB3] & 0xFF ^ b3(k3);
/* falls through */
case 3:
lB0 = P[P_03][lB0] & 0xFF ^ b0(k2);
lB1 = P[P_13][lB1] & 0xFF ^ b1(k2);
lB2 = P[P_23][lB2] & 0xFF ^ b2(k2);
lB3 = P[P_33][lB3] & 0xFF ^ b3(k2);
/* falls through */
case 2:
sBox[2 * i] = MDS[0][P[P_01][P[P_02][lB0] & 0xFF ^ b0(k1)] & 0xFF ^ b0(k0)];
sBox[2 * i + 1] = MDS[1][P[P_11][P[P_12][lB1] & 0xFF ^ b1(k1)] & 0xFF ^ b1(k0)];
sBox[0x200 + 2 * i] = MDS[2][P[P_21][P[P_22][lB2] & 0xFF ^ b2(k1)] & 0xFF ^ b2(k0)];
sBox[0x200 + 2 * i + 1] = MDS[3][P[P_31][P[P_32][lB3] & 0xFF ^ b3(k1)] & 0xFF ^ b3(k0)];
break;
default:
}
}
return [sBox, subKeys];
}
throw 'key passed is undefined or not an array';
}
, blockEncrypt = function blockEncrypt(input, inOffset, sessionKey) {
if (input &&
sessionKey &&
utils.isAnArray(sessionKey) &&
utils.isAnArray(input)) {
input = new Uint8Array(input);
var sBox = sessionKey[0]
, sKey = sessionKey[1]
/*eslint-disable no-plusplus*/
, x0 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
, x1 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
, x2 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
, x3 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
/*eslint-enable no-plusplus*/
, t0
, t1
, k = ROUND_SUBKEYS
, R = 0;
x0 ^= sKey[INPUT_WHITEN];
x1 ^= sKey[INPUT_WHITEN + 1];
x2 ^= sKey[INPUT_WHITEN + 2];
x3 ^= sKey[INPUT_WHITEN + 3];
for (R = 0; R < ROUNDS; R += 2) {
t0 = fe32(sBox, x0, 0);
t1 = fe32(sBox, x1, 3);
/*eslint-disable no-plusplus*/
x2 ^= t0 + t1 + sKey[k++];
/*eslint-enable no-plusplus*/
x2 = x2 >>> 1 | x2 << 31;
x3 = x3 << 1 | x3 >>> 31;
/*eslint-disable no-plusplus*/
x3 ^= t0 + 2 * t1 + sKey[k++];
/*eslint-enable no-plusplus*/
t0 = fe32(sBox, x2, 0);
t1 = fe32(sBox, x3, 3);
/*eslint-disable no-plusplus*/
x0 ^= t0 + t1 + sKey[k++];
/*eslint-enable no-plusplus*/
x0 = x0 >>> 1 | x0 << 31;
x1 = x1 << 1 | x1 >>> 31;
/*eslint-disable no-plusplus*/
x1 ^= t0 + 2 * t1 + sKey[k++];
/*eslint-enable no-plusplus*/
}
x2 ^= sKey[OUTPUT_WHITEN];
x3 ^= sKey[OUTPUT_WHITEN + 1];
x0 ^= sKey[OUTPUT_WHITEN + 2];
x1 ^= sKey[OUTPUT_WHITEN + 3];
return new Uint8Array([x2, x2 >>> 8, x2 >>> 16, x2 >>> 24,
x3, x3 >>> 8, x3 >>> 16, x3 >>> 24,
x0, x0 >>> 8, x0 >>> 16, x0 >>> 24,
x1, x1 >>> 8, x1 >>> 16, x1 >>> 24]);
}
throw 'input block is not an array or sessionKey is incorrect';
}
, blockDecrypt = function blockDecrypt(input, inOffset, sessionKey) {
if (input &&
sessionKey &&
utils.isAnArray(sessionKey) &&
utils.isAnArray(input)) {
var sBox = sessionKey[0]
, sKey = sessionKey[1]
/*eslint-disable no-plusplus*/
, x2 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
, x3 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
, x0 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
, x1 = input[inOffset++] & 0xFF |
(input[inOffset++] & 0xFF) << 8 |
(input[inOffset++] & 0xFF) << 16 |
(input[inOffset++] & 0xFF) << 24
/*eslint-enable no-plusplus*/
, k = ROUND_SUBKEYS + 2 * ROUNDS - 1
, t0
, t1
, R = 0;
x2 ^= sKey[OUTPUT_WHITEN];
x3 ^= sKey[OUTPUT_WHITEN + 1];
x0 ^= sKey[OUTPUT_WHITEN + 2];
x1 ^= sKey[OUTPUT_WHITEN + 3];
for (R = 0; R < ROUNDS; R += 2) {
t0 = fe32(sBox, x2, 0);
t1 = fe32(sBox, x3, 3);
/*eslint-disable no-plusplus*/
x1 ^= t0 + 2 * t1 + sKey[k--];
/*eslint-enable no-plusplus*/
x1 = x1 >>> 1 | x1 << 31;
x0 = x0 << 1 | x0 >>> 31;
/*eslint-disable no-plusplus*/
x0 ^= t0 + t1 + sKey[k--];
/*eslint-enable no-plusplus*/
t0 = fe32(sBox, x0, 0);
t1 = fe32(sBox, x1, 3);
/*eslint-disable no-plusplus*/
x3 ^= t0 + 2 * t1 + sKey[k--];
/*eslint-enable no-plusplus*/
x3 = x3 >>> 1 | x3 << 31;
x2 = x2 << 1 | x2 >>> 31;
/*eslint-disable no-plusplus*/
x2 ^= t0 + t1 + sKey[k--];
/*eslint-enable no-plusplus*/
}
x0 ^= sKey[INPUT_WHITEN];
x1 ^= sKey[INPUT_WHITEN + 1];
x2 ^= sKey[INPUT_WHITEN + 2];
x3 ^= sKey[INPUT_WHITEN + 3];
return new Uint8Array([x0, x0 >>> 8, x0 >>> 16, x0 >>> 24,
x1, x1 >>> 8, x1 >>> 16, x1 >>> 24,
x2, x2 >>> 8, x2 >>> 16, x2 >>> 24,
x3, x3 >>> 8, x3 >>> 16, x3 >>> 24]);
}
throw 'input block is not an array or sessionKey is incorrect';
}
, encrypt = function encrypt(userKey, plainText) {
var i
, offset
, ct = []
, tmpBlockEncrypt;
if (utils.isAnArray(userKey) &&
utils.isAnArray(plainText)) {
userKey = new Uint8Array(userKey);
plainText = new Uint8Array(plainText);
} else {
throw 'Inputs must be an array';
}
userKey = makeKey(userKey);
for (offset = 0; offset < plainText.length; offset += 16) {
tmpBlockEncrypt = blockEncrypt(plainText, offset, userKey);
for (i = 0; i < tmpBlockEncrypt.length; i += 1) {
ct.push(tmpBlockEncrypt[i]);
}
}
return ct;
}
, decrypt = function decrypt(userKey, chiperText) {
var i
, offset
, cpt = []
, tmpBlockDecrypt;
if (utils.isAnArray(userKey) &&
utils.isAnArray(chiperText)) {
userKey = new Uint8Array(userKey);
chiperText = new Uint8Array(chiperText);
} else {
throw 'Inputs must be an array';
}
userKey = makeKey(userKey);
for (offset = 0; offset < chiperText.length; offset += 16) {
tmpBlockDecrypt = blockDecrypt(chiperText, offset, userKey);
for (i = 0; i < tmpBlockDecrypt.length; i += 1) {
cpt.push(tmpBlockDecrypt[i]);
}
}
return cpt;
}
, encryptCBC = function encryptCBC(userKey, plainText) {
if (utils.isAnArray(userKey) &&
utils.isAnArray(plainText)) {
userKey = new Uint8Array(userKey);
plainText = new Uint8Array(plainText);
} else {
throw 'Inputs must be an array';
}
userKey = makeKey(userKey);
var result = []
, loops = plainText.length / BLOCK_SIZE
, pos = 0
, cBuffer = []
, buffer1 = []
, buffer2 = []
, vector = initializingVector
, index = 0
, secondIndex = 0
, tmpCBuffer
, nVal
, position;
for (; index < loops; index += 1) {
cBuffer = plainText.subarray(pos, pos + BLOCK_SIZE);
if (cBuffer.length < BLOCK_SIZE) {
tmpCBuffer = [];
for (paddingIndex = 0; paddingIndex < BLOCK_SIZE; paddingIndex += 1) {
nVal = cBuffer[paddingIndex];
if (nVal !== undefined) {
tmpCBuffer.push(nVal);
} else {
tmpCBuffer.push(0x00);
}
}
cBuffer = tmpCBuffer;
}
buffer1 = xorBuffers(cBuffer, vector);
buffer2 = blockEncrypt(buffer1, 0, userKey);
for (secondIndex = pos; secondIndex < buffer2.length + pos; secondIndex += 1) {
position = secondIndex - pos;
if (buffer2[position] !== undefined) {
result.splice(secondIndex, 0, buffer2[position]);
}
}
vector = buffer2;
pos += BLOCK_SIZE;
}
return result;
}
, decryptCBC = function decryptCBC(userKey, chiperText) {
if (utils.isAnArray(userKey) &&
utils.isAnArray(chiperText)) {
userKey = new Uint8Array(userKey);
chiperText = new Uint8Array(chiperText);
} else {
throw 'Inputs must be an array';
}
userKey = makeKey(userKey);
var result = []
, loops = chiperText.length / BLOCK_SIZE