Skip to content

Commit

Permalink
Adding main files
Browse files Browse the repository at this point in the history
  • Loading branch information
@yrotak
yrotak authored Dec 7, 2020
1 parent bc71871 commit 6ca9370
Show file tree
Hide file tree
Showing 8 changed files with 712 additions and 0 deletions.
347 changes: 347 additions & 0 deletions client/aes.js
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,347 @@
// JavaScript AES implementation using ArrayBuffer
// Copyright (c) 2013 <mattias.wadman@gmail.com>
//
// MIT License:
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

AES = (function() {
// spec from http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf

// for performance cipher and inv_cipher do not create new objects
// instead they take a input buffer and pass it around to keep state
// and it is also used as output.

var block_size_bytes = 16;
var block_size_words = 4;
var nb = 4;
var 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
];

var inv_sbox = [
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
];

var rcon = [
0x00000000,
0x01000000,
0x02000000,
0x04000000,
0x08000000,
0x10000000,
0x20000000,
0x40000000,
0x80000000,
0x1b000000,
0x36000000
];

// from http://www.cs.utsa.edu/~wagner/laws/FFM.html
function ffmul(a, b) {
var r = 0;
var t;

while (a) {
if ((a & 1)) {
r = r ^ b;
}

t = b & 0x80;
b <<= 1;
if (t) {
b ^= 0x1b;
}

a >>= 1;
}

return r;
}

function ffmul_table(n) {
var table = new Array(256);

for (var i = 0; i < 256; i++) {
table[i] = ffmul(n, i) & 0xff;
}

return table;
}

// precompute for factors used in (inv)mix_columns
var ffmul_t_2 = ffmul_table(2);
var ffmul_t_3 = ffmul_table(3);
var ffmul_t_9 = ffmul_table(9);
var ffmul_t_b = ffmul_table(0xb);
var ffmul_t_d = ffmul_table(0xd);
var ffmul_t_e = ffmul_table(0xe);

function sub_word(w) {
return (
sbox[w >>> 24] << 24 |
sbox[(w >>> 16) & 0xff] << 16 |
sbox[(w >>> 8) & 0xff] << 8 |
sbox[w & 0xff]
);
}

function rot_word(w) {
return w >>> 24 | w << 8;
}

function endian_swap32(n) {
return n >>> 24 | (n & 0xff0000) >>> 8 | (n & 0xff00) << 8 | (n & 0xff) << 24;
}

// little endian if first byte in 32 bit uint 1 is 1
var is_little_endian = ((new Uint8Array((new Uint32Array([1])).buffer))[0] == 1);

// key is 16, 24 or 32 byte ArrayBuffer
function key_expansion(key) {
var key_u8 = new Uint8Array(key);
var nk = key_u8.length / 4;
var nr = nk + 6;

var w = new Uint32Array(nb * (nr+1));
for (var i = 0; i < nk; i++) {
w[i] = (
key_u8[i*4] << 24 |
key_u8[i*4+1] << 16 |
key_u8[i*4+2] << 8 |
key_u8[i*4+3]
);
}

for (var i = nk; i < nb*(nr+1); i++) {
var temp = w[i - 1];
if (i % nk == 0) {
temp = sub_word(rot_word(temp)) ^ rcon[i/nk];
} else if (nk > 6 && i % nk == 4) {
temp = sub_word(temp);
}

w[i] = w[i - nk] ^ temp;
}

// make sure key schedule byte order matches state byte order
// this is so that correct bytes are xored for add_round_key
if (is_little_endian) {
for (var i = 0; i < w.length; i++) {
w[i] = endian_swap32(w[i]);
}
}

return w;
}

// state_u8 is 16 byte Uint8Array (also used as output)
// w is value from key_expansion
function cipher(state_u32, w) {
var nr = (w.length / nb - 1)*4;
var s0, s1, s2, s3;
var t0, t1, t2, t3;
var m0, m1, m2, m3;

// add_round_key
s0 = (state_u32[0] ^ w[0]) >>> 0;
s1 = (state_u32[1] ^ w[1]) >>> 0;
s2 = (state_u32[2] ^ w[2]) >>> 0;
s3 = (state_u32[3] ^ w[3]) >>> 0;

for (var round = 4; round < nr; round += 4) {
// sub_byte, shift_rows, mix_columns, add_round_key

t0 = s0;
t1 = s1;
t2 = s2;
t3 = s3;

m0 = sbox[t0 & 0xff] >>> 0;
m1 = sbox[(t1 >>> 8) & 0xff] >>> 0;
m2 = sbox[(t2 >>> 16) & 0xff] >>> 0;
m3 = sbox[t3 >>> 24] >>> 0;
s0 = ((
(ffmul_t_2[m0] ^ ffmul_t_3[m1] ^ m2 ^ m3) |
(m0 ^ ffmul_t_2[m1] ^ ffmul_t_3[m2] ^ m3) << 8 |
(m0 ^ m1 ^ ffmul_t_2[m2] ^ ffmul_t_3[m3]) << 16 |
(ffmul_t_3[m0] ^ m1 ^ m2 ^ ffmul_t_2[m3]) << 24
) ^ w[round]) >>> 0;
m0 = sbox[t1 & 0xff] >>> 0;
m1 = sbox[(t2 >>> 8) & 0xff] >>> 0;
m2 = sbox[(t3 >>> 16) & 0xff] >>> 0;
m3 = sbox[t0 >>> 24] >>> 0;
s1 = ((
(ffmul_t_2[m0] ^ ffmul_t_3[m1] ^ m2 ^ m3) |
(m0 ^ ffmul_t_2[m1] ^ ffmul_t_3[m2] ^ m3) << 8 |
(m0 ^ m1 ^ ffmul_t_2[m2] ^ ffmul_t_3[m3]) << 16 |
(ffmul_t_3[m0] ^ m1 ^ m2 ^ ffmul_t_2[m3]) << 24
) ^ w[round+1]) >>> 0;
m0 = sbox[t2 & 0xff] >>> 0;
m1 = sbox[(t3 >>> 8) & 0xff] >>> 0;
m2 = sbox[(t0 >>> 16) & 0xff] >>> 0;
m3 = sbox[t1 >>> 24] >>> 0;
s2 = ((
(ffmul_t_2[m0] ^ ffmul_t_3[m1] ^ m2 ^ m3) |
(m0 ^ ffmul_t_2[m1] ^ ffmul_t_3[m2] ^ m3) << 8 |
(m0 ^ m1 ^ ffmul_t_2[m2] ^ ffmul_t_3[m3]) << 16 |
(ffmul_t_3[m0] ^ m1 ^ m2 ^ ffmul_t_2[m3]) << 24
) ^ w[round+2]) >>> 0;
m0 = sbox[t3 & 0xff] >>> 0;
m1 = sbox[(t0 >>> 8) & 0xff] >>> 0;
m2 = sbox[(t1 >>> 16) & 0xff] >>> 0;
m3 = sbox[t2 >>> 24] >>> 0;
s3 = ((
(ffmul_t_2[m0] ^ ffmul_t_3[m1] ^ m2 ^ m3) |
(m0 ^ ffmul_t_2[m1] ^ ffmul_t_3[m2] ^ m3) << 8 |
(m0 ^ m1 ^ ffmul_t_2[m2] ^ ffmul_t_3[m3]) << 16 |
(ffmul_t_3[m0] ^ m1 ^ m2 ^ ffmul_t_2[m3]) << 24
) ^ w[round+3]) >>> 0;
}

// sub_byte, shift_rows, add_round_key
state_u32[0] = w[nr] ^ (sbox[s0 & 0xff] | sbox[(s1 >>> 8) & 0xff] << 8 | sbox[(s2 >>> 16) & 0xff] << 16 | sbox[s3 >>> 24] << 24);
state_u32[1] = w[nr+1] ^ (sbox[s1 & 0xff] | sbox[(s2 >>> 8) & 0xff] << 8 | sbox[(s3 >>> 16) & 0xff] << 16 | sbox[s0 >>> 24] << 24);
state_u32[2] = w[nr+2] ^ (sbox[s2 & 0xff] | sbox[(s3 >>> 8) & 0xff] << 8 | sbox[(s0 >>> 16) & 0xff] << 16 | sbox[s1 >>> 24] << 24);
state_u32[3] = w[nr+3] ^ (sbox[s3 & 0xff] | sbox[(s0 >>> 8) & 0xff] << 8 | sbox[(s1 >>> 16) & 0xff] << 16 | sbox[s2 >>> 24] << 24);
}

// state_u8 is 16 byte Uint8Array (also used as output)
// w is value from key_expansion
function inv_cipher(state_u32, w) {
var nr = (w.length / nb - 1) * 4;
var s0, s1, s2, s3;
var t0, t1, t2, t3;

// add_round_key
s0 = (state_u32[0] ^ w[nr]) >>> 0;
s1 = (state_u32[1] ^ w[nr+1]) >>> 0;
s2 = (state_u32[2] ^ w[nr+2]) >>> 0;
s3 = (state_u32[3] ^ w[nr+3]) >>> 0;

for (var round = nr-4; round > 0; round -= 4) {
// inv_shift_rows, inv_sub_byte, add_round_key

t0 = s0;
t1 = s1;
t2 = s2;
t3 = s3;
s0 = ((
inv_sbox[t0 & 0xff] | inv_sbox[(t3 >>> 8) & 0xff] << 8 | inv_sbox[(t2 >>> 16) & 0xff] << 16 | inv_sbox[t1 >>> 24] << 24
) ^ w[round]) >>> 0;
s1 = ((
inv_sbox[t1 & 0xff] | inv_sbox[(t0 >>> 8) & 0xff] << 8 | inv_sbox[(t3 >>> 16) & 0xff] << 16 | inv_sbox[t2 >>> 24] << 24
) ^ w[round+1]) >>> 0;
s2 = ((
inv_sbox[t2 & 0xff] | inv_sbox[(t1 >>> 8) & 0xff] << 8 | inv_sbox[(t0 >>> 16) & 0xff] << 16 | inv_sbox[t3 >>> 24] << 24
) ^ w[round+2]) >>> 0;
s3 = ((
inv_sbox[t3 & 0xff] | inv_sbox[(t2 >>> 8) & 0xff] << 8 | inv_sbox[(t1 >>> 16) & 0xff] << 16 | inv_sbox[t0 >>> 24] << 24
) ^ w[round+3]) >>> 0;

// inv_mix_columns
t0 = s0 & 0xff >>> 0;
t1 = ((s0 >>> 8) & 0xff) >>>0;
t2 = ((s0 >>> 16) & 0xff) >>> 0;
t3 = s0 >>> 24;
s0 = (
(ffmul_t_e[t0] ^ ffmul_t_b[t1] ^ ffmul_t_d[t2] ^ ffmul_t_9[t3]) |
(ffmul_t_9[t0] ^ ffmul_t_e[t1] ^ ffmul_t_b[t2] ^ ffmul_t_d[t3]) << 8 |
(ffmul_t_d[t0] ^ ffmul_t_9[t1] ^ ffmul_t_e[t2] ^ ffmul_t_b[t3]) << 16 |
(ffmul_t_b[t0] ^ ffmul_t_d[t1] ^ ffmul_t_9[t2] ^ ffmul_t_e[t3]) << 24
) >>> 0;
t0 = (s1 & 0xff) >>> 0;
t1 = ((s1 >>> 8) & 0xff) >>> 0;
t2 = ((s1 >>> 16) & 0xff) >>> 0;
t3 = s1 >>> 24;
s1 = (
(ffmul_t_e[t0] ^ ffmul_t_b[t1] ^ ffmul_t_d[t2] ^ ffmul_t_9[t3]) |
(ffmul_t_9[t0] ^ ffmul_t_e[t1] ^ ffmul_t_b[t2] ^ ffmul_t_d[t3]) << 8 |
(ffmul_t_d[t0] ^ ffmul_t_9[t1] ^ ffmul_t_e[t2] ^ ffmul_t_b[t3]) << 16 |
(ffmul_t_b[t0] ^ ffmul_t_d[t1] ^ ffmul_t_9[t2] ^ ffmul_t_e[t3]) << 24
) >>> 0;
t0 = (s2 & 0xff) >>> 0;
t1 = ((s2 >>> 8) & 0xff) >>> 0;
t2 = ((s2 >>> 16) & 0xff) >>> 0;
t3 = s2 >>> 24;
s2 = (
(ffmul_t_e[t0] ^ ffmul_t_b[t1] ^ ffmul_t_d[t2] ^ ffmul_t_9[t3]) |
(ffmul_t_9[t0] ^ ffmul_t_e[t1] ^ ffmul_t_b[t2] ^ ffmul_t_d[t3]) << 8 |
(ffmul_t_d[t0] ^ ffmul_t_9[t1] ^ ffmul_t_e[t2] ^ ffmul_t_b[t3]) << 16 |
(ffmul_t_b[t0] ^ ffmul_t_d[t1] ^ ffmul_t_9[t2] ^ ffmul_t_e[t3]) << 24
) >>> 0;
t0 = (s3 & 0xff) >>> 0;
t1 = ((s3 >>> 8) & 0xff) >>> 0;
t2 = ((s3 >>> 16) & 0xff) >>> 0;
t3 = s3 >>> 24;
s3 = (
(ffmul_t_e[t0] ^ ffmul_t_b[t1] ^ ffmul_t_d[t2] ^ ffmul_t_9[t3]) |
(ffmul_t_9[t0] ^ ffmul_t_e[t1] ^ ffmul_t_b[t2] ^ ffmul_t_d[t3]) << 8 |
(ffmul_t_d[t0] ^ ffmul_t_9[t1] ^ ffmul_t_e[t2] ^ ffmul_t_b[t3]) << 16 |
(ffmul_t_b[t0] ^ ffmul_t_d[t1] ^ ffmul_t_9[t2] ^ ffmul_t_e[t3]) << 24
) >>> 0;
}

// inv_shift_rows, inv_sub_byte, add_round_key
state_u32[0] = w[0] ^ (inv_sbox[s0 & 0xff] | inv_sbox[(s3 >>> 8) & 0xff] << 8 | inv_sbox[(s2 >>> 16) & 0xff] << 16 | inv_sbox[s1 >>> 24] << 24);
state_u32[1] = w[1] ^ (inv_sbox[s1 & 0xff] | inv_sbox[(s0 >>> 8) & 0xff] << 8 | inv_sbox[(s3 >>> 16) & 0xff] << 16 | inv_sbox[s2 >>> 24] << 24);
state_u32[2] = w[2] ^ (inv_sbox[s2 & 0xff] | inv_sbox[(s1 >>> 8) & 0xff] << 8 | inv_sbox[(s0 >>> 16) & 0xff] << 16 | inv_sbox[s3 >>> 24] << 24);
state_u32[3] = w[3] ^ (inv_sbox[s3 & 0xff] | inv_sbox[(s2 >>> 8) & 0xff] << 8 | inv_sbox[(s1 >>> 16) & 0xff] << 16 | inv_sbox[s0 >>> 24] << 24);
}

return {
block_size_bytes: block_size_bytes,
block_size_words: block_size_words,
endian_swap32: endian_swap32,
is_little_endian: is_little_endian,
key_expansion: key_expansion,
cipher: cipher,
inv_cipher: inv_cipher
};
})();
Loading

0 comments on commit 6ca9370

Please sign in to comment.