Instantly share code, notes, and snippets.

@hellman /1_vuln.c
Last active Nov 21, 2017

Embed
What would you like to do?
HXP CTF 2017 - 4ES (Crypto 500)
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <mbedtls/aes.h>
typedef unsigned char byte;
typedef ssize_t (*ft)(int, byte *, size_t);
static int o(char const *s)
{
int r;
if (0 > (r = open(s, O_RDONLY)))
exit(1);
return r;
}
static void c(int d)
{
if (close(d))
exit(2);
}
static void t(ft f, int d, byte *s, size_t l, bool e)
{
for (ssize_t n = -1; l && n; s += n, l -= n)
if (0 >= (n = f(d, s, l)) && (e || n))
exit(3);
}
void k(mbedtls_aes_context *a, size_t l)
{
byte w[l];
{
int d = o("/dev/urandom");
t((ft) read, d, w, sizeof(w), true);
c(d);
}
mbedtls_aes_setkey_enc(a, w, 8 * sizeof(w));
a->nr = 4;
}
int main()
{
byte x[64] = {0}, y[sizeof(x)], z[16];
mbedtls_aes_context aes;
mbedtls_aes_init(&aes);
k(&aes, 32);
{
int d = o("flag.txt");
t((ft) read, d, x, sizeof(x) - 1, false);
c(d);
}
for (unsigned i = 0; i < 0x100; ++i) {
t((ft) read, 0, z, sizeof(z), true);
if (mbedtls_aes_crypt_cbc(&aes, MBEDTLS_AES_ENCRYPT, sizeof(x), z, x, y)) exit(5);
t((ft) write, 1, y, sizeof(y), true);
}
mbedtls_aes_free(&aes);
}
'''
Collect around 64 IV/ciphertexts such that only one byte is changing.
After 3 rounds, before last MC all bytes will take exactly 64 unique values.
We can check this by bruteforcing 32-bit key for each column separately.
solve1.py: runs in ~13 minutes
To explain the property, note that a column with numbers of unique elements (N, 1, 1, 1) goes to (N, N, N, N) through MC
because each output element of MC becomes const*x0 + const and can not have collisions if all x0 are different.
After 2 rounds, before MC in each columns 3 bytes will have 1 unique values, the other byte will take all 64 unique values.
We can check this by bruteforcing 32-bit key for each column separately.
solve2.py: runs in a few seconds
Once we know consequent 32 bytes of the key schedule, we can revert it and get the master key.
solve3.py
'''
LOCAL = 1
NPLAINS = 64
from aes import *
from inctf import xor
ivs = []
for i in xrange(NPLAINS):
ivs.append(chr(i).ljust(16, "\x00"))
if not LOCAL:
f = Sock("35.198.105.111 1077")
cts = []
for i in xrange(NPLAINS):
f.send(ivs[i])
cts.append(f.read_nbytes(64))
print cts[-1].encode("hex")
else:
flag = "ABCDEFGHabcdefgh"
key = "68b329da9893e34099c7d8ad5cb9c940"
set_key32(key, nr=4)
cts = []
for iv in ivs:
ct = encrypt(xor(flag, iv), nr=4)
cts.append(ct)
print (iv+ct).encode("hex")
for i in xrange(NPLAINS):
with open("data/iv%03d" % i, "w") as f:
f.write(ivs[i])
with open("data/ct%03d" % i, "w") as f:
f.write(cts[i])
#!/usr/bin/env python
#-*- coding:utf-8 -*-
from commands import getoutput
NPLAINS = 64
from aes import *
ivs = []
cts = []
for i in xrange(NPLAINS):
with open("data/iv%03d" % i) as f:
ivs.append(f.read())
with open("data/ct%03d" % i) as f:
cts.append(f.read())
for x in xrange(4):
res = ""
for c in cts:
c = c[:16]
c = transpose(map(ord, c))
c = SRi(c) # undo the last SR
col = c[x::4]
res += "".join(map(chr, col))
print "# %d: %s" % (x, res.encode("hex"))
cmd = "./solve1 %d %s" % (NPLAINS, res.encode("hex"))
res = getoutput(cmd)
assert "good" in res
keycol = res.split()[-1].decode("hex")[::-1]
print map(ord, keycol), ","
#include <stdio.h>
#include <assert.h>
#define FORN(i, n) for(int i = 0; i < n; i++)
uint8_t sbox[256] = {
99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118, 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192, 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21, 4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117, 9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132, 83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207, 208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168, 81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210, 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115, 96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219, 224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121, 231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8, 186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138, 112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158, 225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223, 140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22
};
uint8_t rsbox[256] = {
82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215, 251, 124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222, 233, 203, 84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66, 250, 195, 78, 8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109, 139, 209, 37, 114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204, 93, 101, 182, 146, 108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87, 167, 141, 157, 132, 144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5, 184, 179, 69, 6, 208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1, 19, 138, 107, 58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240, 180, 230, 115, 150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232, 28, 117, 223, 110, 71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14, 170, 24, 190, 27, 252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254, 120, 205, 90, 244, 31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39, 128, 236, 95, 96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147, 201, 156, 239, 160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60, 131, 83, 153, 97, 23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85, 33, 12, 125
};
uint32_t MCtab[4][256] = {
{0x00000000,0x03010102,0x06020204,0x05030306,0x0c040408,0x0f05050a,0x0a06060c,0x0907070e,0x18080810,0x1b090912,0x1e0a0a14,0x1d0b0b16,0x140c0c18,0x170d0d1a,0x120e0e1c,0x110f0f1e,0x30101020,0x33111122,0x36121224,0x35131326,0x3c141428,0x3f15152a,0x3a16162c,0x3917172e,0x28181830,0x2b191932,0x2e1a1a34,0x2d1b1b36,0x241c1c38,0x271d1d3a,0x221e1e3c,0x211f1f3e,0x60202040,0x63212142,0x66222244,0x65232346,0x6c242448,0x6f25254a,0x6a26264c,0x6927274e,0x78282850,0x7b292952,0x7e2a2a54,0x7d2b2b56,0x742c2c58,0x772d2d5a,0x722e2e5c,0x712f2f5e,0x50303060,0x53313162,0x56323264,0x55333366,0x5c343468,0x5f35356a,0x5a36366c,0x5937376e,0x48383870,0x4b393972,0x4e3a3a74,0x4d3b3b76,0x443c3c78,0x473d3d7a,0x423e3e7c,0x413f3f7e,0xc0404080,0xc3414182,0xc6424284,0xc5434386,0xcc444488,0xcf45458a,0xca46468c,0xc947478e,0xd8484890,0xdb494992,0xde4a4a94,0xdd4b4b96,0xd44c4c98,0xd74d4d9a,0xd24e4e9c,0xd14f4f9e,0xf05050a0,0xf35151a2,0xf65252a4,0xf55353a6,0xfc5454a8,0xff5555aa,0xfa5656ac,0xf95757ae,0xe85858b0,0xeb5959b2,0xee5a5ab4,0xed5b5bb6,0xe45c5cb8,0xe75d5dba,0xe25e5ebc,0xe15f5fbe,0xa06060c0,0xa36161c2,0xa66262c4,0xa56363c6,0xac6464c8,0xaf6565ca,0xaa6666cc,0xa96767ce,0xb86868d0,0xbb6969d2,0xbe6a6ad4,0xbd6b6bd6,0xb46c6cd8,0xb76d6dda,0xb26e6edc,0xb16f6fde,0x907070e0,0x937171e2,0x967272e4,0x957373e6,0x9c7474e8,0x9f7575ea,0x9a7676ec,0x997777ee,0x887878f0,0x8b7979f2,0x8e7a7af4,0x8d7b7bf6,0x847c7cf8,0x877d7dfa,0x827e7efc,0x817f7ffe,0x9b80801b,0x98818119,0x9d82821f,0x9e83831d,0x97848413,0x94858511,0x91868617,0x92878715,0x8388880b,0x80898909,0x858a8a0f,0x868b8b0d,0x8f8c8c03,0x8c8d8d01,0x898e8e07,0x8a8f8f05,0xab90903b,0xa8919139,0xad92923f,0xae93933d,0xa7949433,0xa4959531,0xa1969637,0xa2979735,0xb398982b,0xb0999929,0xb59a9a2f,0xb69b9b2d,0xbf9c9c23,0xbc9d9d21,0xb99e9e27,0xba9f9f25,0xfba0a05b,0xf8a1a159,0xfda2a25f,0xfea3a35d,0xf7a4a453,0xf4a5a551,0xf1a6a657,0xf2a7a755,0xe3a8a84b,0xe0a9a949,0xe5aaaa4f,0xe6abab4d,0xefacac43,0xecadad41,0xe9aeae47,0xeaafaf45,0xcbb0b07b,0xc8b1b179,0xcdb2b27f,0xceb3b37d,0xc7b4b473,0xc4b5b571,0xc1b6b677,0xc2b7b775,0xd3b8b86b,0xd0b9b969,0xd5baba6f,0xd6bbbb6d,0xdfbcbc63,0xdcbdbd61,0xd9bebe67,0xdabfbf65,0x5bc0c09b,0x58c1c199,0x5dc2c29f,0x5ec3c39d,0x57c4c493,0x54c5c591,0x51c6c697,0x52c7c795,0x43c8c88b,0x40c9c989,0x45caca8f,0x46cbcb8d,0x4fcccc83,0x4ccdcd81,0x49cece87,0x4acfcf85,0x6bd0d0bb,0x68d1d1b9,0x6dd2d2bf,0x6ed3d3bd,0x67d4d4b3,0x64d5d5b1,0x61d6d6b7,0x62d7d7b5,0x73d8d8ab,0x70d9d9a9,0x75dadaaf,0x76dbdbad,0x7fdcdca3,0x7cdddda1,0x79dedea7,0x7adfdfa5,0x3be0e0db,0x38e1e1d9,0x3de2e2df,0x3ee3e3dd,0x37e4e4d3,0x34e5e5d1,0x31e6e6d7,0x32e7e7d5,0x23e8e8cb,0x20e9e9c9,0x25eaeacf,0x26ebebcd,0x2fececc3,0x2cededc1,0x29eeeec7,0x2aefefc5,0x0bf0f0fb,0x08f1f1f9,0x0df2f2ff,0x0ef3f3fd,0x07f4f4f3,0x04f5f5f1,0x01f6f6f7,0x02f7f7f5,0x13f8f8eb,0x10f9f9e9,0x15fafaef,0x16fbfbed,0x1ffcfce3,0x1cfdfde1,0x19fefee7,0x1affffe5,},
{0x00000000,0x01010203,0x02020406,0x03030605,0x0404080c,0x05050a0f,0x06060c0a,0x07070e09,0x08081018,0x0909121b,0x0a0a141e,0x0b0b161d,0x0c0c1814,0x0d0d1a17,0x0e0e1c12,0x0f0f1e11,0x10102030,0x11112233,0x12122436,0x13132635,0x1414283c,0x15152a3f,0x16162c3a,0x17172e39,0x18183028,0x1919322b,0x1a1a342e,0x1b1b362d,0x1c1c3824,0x1d1d3a27,0x1e1e3c22,0x1f1f3e21,0x20204060,0x21214263,0x22224466,0x23234665,0x2424486c,0x25254a6f,0x26264c6a,0x27274e69,0x28285078,0x2929527b,0x2a2a547e,0x2b2b567d,0x2c2c5874,0x2d2d5a77,0x2e2e5c72,0x2f2f5e71,0x30306050,0x31316253,0x32326456,0x33336655,0x3434685c,0x35356a5f,0x36366c5a,0x37376e59,0x38387048,0x3939724b,0x3a3a744e,0x3b3b764d,0x3c3c7844,0x3d3d7a47,0x3e3e7c42,0x3f3f7e41,0x404080c0,0x414182c3,0x424284c6,0x434386c5,0x444488cc,0x45458acf,0x46468cca,0x47478ec9,0x484890d8,0x494992db,0x4a4a94de,0x4b4b96dd,0x4c4c98d4,0x4d4d9ad7,0x4e4e9cd2,0x4f4f9ed1,0x5050a0f0,0x5151a2f3,0x5252a4f6,0x5353a6f5,0x5454a8fc,0x5555aaff,0x5656acfa,0x5757aef9,0x5858b0e8,0x5959b2eb,0x5a5ab4ee,0x5b5bb6ed,0x5c5cb8e4,0x5d5dbae7,0x5e5ebce2,0x5f5fbee1,0x6060c0a0,0x6161c2a3,0x6262c4a6,0x6363c6a5,0x6464c8ac,0x6565caaf,0x6666ccaa,0x6767cea9,0x6868d0b8,0x6969d2bb,0x6a6ad4be,0x6b6bd6bd,0x6c6cd8b4,0x6d6ddab7,0x6e6edcb2,0x6f6fdeb1,0x7070e090,0x7171e293,0x7272e496,0x7373e695,0x7474e89c,0x7575ea9f,0x7676ec9a,0x7777ee99,0x7878f088,0x7979f28b,0x7a7af48e,0x7b7bf68d,0x7c7cf884,0x7d7dfa87,0x7e7efc82,0x7f7ffe81,0x80801b9b,0x81811998,0x82821f9d,0x83831d9e,0x84841397,0x85851194,0x86861791,0x87871592,0x88880b83,0x89890980,0x8a8a0f85,0x8b8b0d86,0x8c8c038f,0x8d8d018c,0x8e8e0789,0x8f8f058a,0x90903bab,0x919139a8,0x92923fad,0x93933dae,0x949433a7,0x959531a4,0x969637a1,0x979735a2,0x98982bb3,0x999929b0,0x9a9a2fb5,0x9b9b2db6,0x9c9c23bf,0x9d9d21bc,0x9e9e27b9,0x9f9f25ba,0xa0a05bfb,0xa1a159f8,0xa2a25ffd,0xa3a35dfe,0xa4a453f7,0xa5a551f4,0xa6a657f1,0xa7a755f2,0xa8a84be3,0xa9a949e0,0xaaaa4fe5,0xabab4de6,0xacac43ef,0xadad41ec,0xaeae47e9,0xafaf45ea,0xb0b07bcb,0xb1b179c8,0xb2b27fcd,0xb3b37dce,0xb4b473c7,0xb5b571c4,0xb6b677c1,0xb7b775c2,0xb8b86bd3,0xb9b969d0,0xbaba6fd5,0xbbbb6dd6,0xbcbc63df,0xbdbd61dc,0xbebe67d9,0xbfbf65da,0xc0c09b5b,0xc1c19958,0xc2c29f5d,0xc3c39d5e,0xc4c49357,0xc5c59154,0xc6c69751,0xc7c79552,0xc8c88b43,0xc9c98940,0xcaca8f45,0xcbcb8d46,0xcccc834f,0xcdcd814c,0xcece8749,0xcfcf854a,0xd0d0bb6b,0xd1d1b968,0xd2d2bf6d,0xd3d3bd6e,0xd4d4b367,0xd5d5b164,0xd6d6b761,0xd7d7b562,0xd8d8ab73,0xd9d9a970,0xdadaaf75,0xdbdbad76,0xdcdca37f,0xdddda17c,0xdedea779,0xdfdfa57a,0xe0e0db3b,0xe1e1d938,0xe2e2df3d,0xe3e3dd3e,0xe4e4d337,0xe5e5d134,0xe6e6d731,0xe7e7d532,0xe8e8cb23,0xe9e9c920,0xeaeacf25,0xebebcd26,0xececc32f,0xededc12c,0xeeeec729,0xefefc52a,0xf0f0fb0b,0xf1f1f908,0xf2f2ff0d,0xf3f3fd0e,0xf4f4f307,0xf5f5f104,0xf6f6f701,0xf7f7f502,0xf8f8eb13,0xf9f9e910,0xfafaef15,0xfbfbed16,0xfcfce31f,0xfdfde11c,0xfefee719,0xffffe51a,},
{0x00000000,0x01020301,0x02040602,0x03060503,0x04080c04,0x050a0f05,0x060c0a06,0x070e0907,0x08101808,0x09121b09,0x0a141e0a,0x0b161d0b,0x0c18140c,0x0d1a170d,0x0e1c120e,0x0f1e110f,0x10203010,0x11223311,0x12243612,0x13263513,0x14283c14,0x152a3f15,0x162c3a16,0x172e3917,0x18302818,0x19322b19,0x1a342e1a,0x1b362d1b,0x1c38241c,0x1d3a271d,0x1e3c221e,0x1f3e211f,0x20406020,0x21426321,0x22446622,0x23466523,0x24486c24,0x254a6f25,0x264c6a26,0x274e6927,0x28507828,0x29527b29,0x2a547e2a,0x2b567d2b,0x2c58742c,0x2d5a772d,0x2e5c722e,0x2f5e712f,0x30605030,0x31625331,0x32645632,0x33665533,0x34685c34,0x356a5f35,0x366c5a36,0x376e5937,0x38704838,0x39724b39,0x3a744e3a,0x3b764d3b,0x3c78443c,0x3d7a473d,0x3e7c423e,0x3f7e413f,0x4080c040,0x4182c341,0x4284c642,0x4386c543,0x4488cc44,0x458acf45,0x468cca46,0x478ec947,0x4890d848,0x4992db49,0x4a94de4a,0x4b96dd4b,0x4c98d44c,0x4d9ad74d,0x4e9cd24e,0x4f9ed14f,0x50a0f050,0x51a2f351,0x52a4f652,0x53a6f553,0x54a8fc54,0x55aaff55,0x56acfa56,0x57aef957,0x58b0e858,0x59b2eb59,0x5ab4ee5a,0x5bb6ed5b,0x5cb8e45c,0x5dbae75d,0x5ebce25e,0x5fbee15f,0x60c0a060,0x61c2a361,0x62c4a662,0x63c6a563,0x64c8ac64,0x65caaf65,0x66ccaa66,0x67cea967,0x68d0b868,0x69d2bb69,0x6ad4be6a,0x6bd6bd6b,0x6cd8b46c,0x6ddab76d,0x6edcb26e,0x6fdeb16f,0x70e09070,0x71e29371,0x72e49672,0x73e69573,0x74e89c74,0x75ea9f75,0x76ec9a76,0x77ee9977,0x78f08878,0x79f28b79,0x7af48e7a,0x7bf68d7b,0x7cf8847c,0x7dfa877d,0x7efc827e,0x7ffe817f,0x801b9b80,0x81199881,0x821f9d82,0x831d9e83,0x84139784,0x85119485,0x86179186,0x87159287,0x880b8388,0x89098089,0x8a0f858a,0x8b0d868b,0x8c038f8c,0x8d018c8d,0x8e07898e,0x8f058a8f,0x903bab90,0x9139a891,0x923fad92,0x933dae93,0x9433a794,0x9531a495,0x9637a196,0x9735a297,0x982bb398,0x9929b099,0x9a2fb59a,0x9b2db69b,0x9c23bf9c,0x9d21bc9d,0x9e27b99e,0x9f25ba9f,0xa05bfba0,0xa159f8a1,0xa25ffda2,0xa35dfea3,0xa453f7a4,0xa551f4a5,0xa657f1a6,0xa755f2a7,0xa84be3a8,0xa949e0a9,0xaa4fe5aa,0xab4de6ab,0xac43efac,0xad41ecad,0xae47e9ae,0xaf45eaaf,0xb07bcbb0,0xb179c8b1,0xb27fcdb2,0xb37dceb3,0xb473c7b4,0xb571c4b5,0xb677c1b6,0xb775c2b7,0xb86bd3b8,0xb969d0b9,0xba6fd5ba,0xbb6dd6bb,0xbc63dfbc,0xbd61dcbd,0xbe67d9be,0xbf65dabf,0xc09b5bc0,0xc19958c1,0xc29f5dc2,0xc39d5ec3,0xc49357c4,0xc59154c5,0xc69751c6,0xc79552c7,0xc88b43c8,0xc98940c9,0xca8f45ca,0xcb8d46cb,0xcc834fcc,0xcd814ccd,0xce8749ce,0xcf854acf,0xd0bb6bd0,0xd1b968d1,0xd2bf6dd2,0xd3bd6ed3,0xd4b367d4,0xd5b164d5,0xd6b761d6,0xd7b562d7,0xd8ab73d8,0xd9a970d9,0xdaaf75da,0xdbad76db,0xdca37fdc,0xdda17cdd,0xdea779de,0xdfa57adf,0xe0db3be0,0xe1d938e1,0xe2df3de2,0xe3dd3ee3,0xe4d337e4,0xe5d134e5,0xe6d731e6,0xe7d532e7,0xe8cb23e8,0xe9c920e9,0xeacf25ea,0xebcd26eb,0xecc32fec,0xedc12ced,0xeec729ee,0xefc52aef,0xf0fb0bf0,0xf1f908f1,0xf2ff0df2,0xf3fd0ef3,0xf4f307f4,0xf5f104f5,0xf6f701f6,0xf7f502f7,0xf8eb13f8,0xf9e910f9,0xfaef15fa,0xfbed16fb,0xfce31ffc,0xfde11cfd,0xfee719fe,0xffe51aff,},
{0x00000000,0x02030101,0x04060202,0x06050303,0x080c0404,0x0a0f0505,0x0c0a0606,0x0e090707,0x10180808,0x121b0909,0x141e0a0a,0x161d0b0b,0x18140c0c,0x1a170d0d,0x1c120e0e,0x1e110f0f,0x20301010,0x22331111,0x24361212,0x26351313,0x283c1414,0x2a3f1515,0x2c3a1616,0x2e391717,0x30281818,0x322b1919,0x342e1a1a,0x362d1b1b,0x38241c1c,0x3a271d1d,0x3c221e1e,0x3e211f1f,0x40602020,0x42632121,0x44662222,0x46652323,0x486c2424,0x4a6f2525,0x4c6a2626,0x4e692727,0x50782828,0x527b2929,0x547e2a2a,0x567d2b2b,0x58742c2c,0x5a772d2d,0x5c722e2e,0x5e712f2f,0x60503030,0x62533131,0x64563232,0x66553333,0x685c3434,0x6a5f3535,0x6c5a3636,0x6e593737,0x70483838,0x724b3939,0x744e3a3a,0x764d3b3b,0x78443c3c,0x7a473d3d,0x7c423e3e,0x7e413f3f,0x80c04040,0x82c34141,0x84c64242,0x86c54343,0x88cc4444,0x8acf4545,0x8cca4646,0x8ec94747,0x90d84848,0x92db4949,0x94de4a4a,0x96dd4b4b,0x98d44c4c,0x9ad74d4d,0x9cd24e4e,0x9ed14f4f,0xa0f05050,0xa2f35151,0xa4f65252,0xa6f55353,0xa8fc5454,0xaaff5555,0xacfa5656,0xaef95757,0xb0e85858,0xb2eb5959,0xb4ee5a5a,0xb6ed5b5b,0xb8e45c5c,0xbae75d5d,0xbce25e5e,0xbee15f5f,0xc0a06060,0xc2a36161,0xc4a66262,0xc6a56363,0xc8ac6464,0xcaaf6565,0xccaa6666,0xcea96767,0xd0b86868,0xd2bb6969,0xd4be6a6a,0xd6bd6b6b,0xd8b46c6c,0xdab76d6d,0xdcb26e6e,0xdeb16f6f,0xe0907070,0xe2937171,0xe4967272,0xe6957373,0xe89c7474,0xea9f7575,0xec9a7676,0xee997777,0xf0887878,0xf28b7979,0xf48e7a7a,0xf68d7b7b,0xf8847c7c,0xfa877d7d,0xfc827e7e,0xfe817f7f,0x1b9b8080,0x19988181,0x1f9d8282,0x1d9e8383,0x13978484,0x11948585,0x17918686,0x15928787,0x0b838888,0x09808989,0x0f858a8a,0x0d868b8b,0x038f8c8c,0x018c8d8d,0x07898e8e,0x058a8f8f,0x3bab9090,0x39a89191,0x3fad9292,0x3dae9393,0x33a79494,0x31a49595,0x37a19696,0x35a29797,0x2bb39898,0x29b09999,0x2fb59a9a,0x2db69b9b,0x23bf9c9c,0x21bc9d9d,0x27b99e9e,0x25ba9f9f,0x5bfba0a0,0x59f8a1a1,0x5ffda2a2,0x5dfea3a3,0x53f7a4a4,0x51f4a5a5,0x57f1a6a6,0x55f2a7a7,0x4be3a8a8,0x49e0a9a9,0x4fe5aaaa,0x4de6abab,0x43efacac,0x41ecadad,0x47e9aeae,0x45eaafaf,0x7bcbb0b0,0x79c8b1b1,0x7fcdb2b2,0x7dceb3b3,0x73c7b4b4,0x71c4b5b5,0x77c1b6b6,0x75c2b7b7,0x6bd3b8b8,0x69d0b9b9,0x6fd5baba,0x6dd6bbbb,0x63dfbcbc,0x61dcbdbd,0x67d9bebe,0x65dabfbf,0x9b5bc0c0,0x9958c1c1,0x9f5dc2c2,0x9d5ec3c3,0x9357c4c4,0x9154c5c5,0x9751c6c6,0x9552c7c7,0x8b43c8c8,0x8940c9c9,0x8f45caca,0x8d46cbcb,0x834fcccc,0x814ccdcd,0x8749cece,0x854acfcf,0xbb6bd0d0,0xb968d1d1,0xbf6dd2d2,0xbd6ed3d3,0xb367d4d4,0xb164d5d5,0xb761d6d6,0xb562d7d7,0xab73d8d8,0xa970d9d9,0xaf75dada,0xad76dbdb,0xa37fdcdc,0xa17cdddd,0xa779dede,0xa57adfdf,0xdb3be0e0,0xd938e1e1,0xdf3de2e2,0xdd3ee3e3,0xd337e4e4,0xd134e5e5,0xd731e6e6,0xd532e7e7,0xcb23e8e8,0xc920e9e9,0xcf25eaea,0xcd26ebeb,0xc32fecec,0xc12ceded,0xc729eeee,0xc52aefef,0xfb0bf0f0,0xf908f1f1,0xff0df2f2,0xfd0ef3f3,0xf307f4f4,0xf104f5f5,0xf701f6f6,0xf502f7f7,0xeb13f8f8,0xe910f9f9,0xef15fafa,0xed16fbfb,0xe31ffcfc,0xe11cfdfd,0xe719fefe,0xe51affff,},
};
uint32_t iMCtab[4][256] = {
{0x00000000,0x0b0d090e,0x161a121c,0x1d171b12,0x2c342438,0x27392d36,0x3a2e3624,0x31233f2a,0x58684870,0x5365417e,0x4e725a6c,0x457f5362,0x745c6c48,0x7f516546,0x62467e54,0x694b775a,0xb0d090e0,0xbbdd99ee,0xa6ca82fc,0xadc78bf2,0x9ce4b4d8,0x97e9bdd6,0x8afea6c4,0x81f3afca,0xe8b8d890,0xe3b5d19e,0xfea2ca8c,0xf5afc382,0xc48cfca8,0xcf81f5a6,0xd296eeb4,0xd99be7ba,0x7bbb3bdb,0x70b632d5,0x6da129c7,0x66ac20c9,0x578f1fe3,0x5c8216ed,0x41950dff,0x4a9804f1,0x23d373ab,0x28de7aa5,0x35c961b7,0x3ec468b9,0x0fe75793,0x04ea5e9d,0x19fd458f,0x12f04c81,0xcb6bab3b,0xc066a235,0xdd71b927,0xd67cb029,0xe75f8f03,0xec52860d,0xf1459d1f,0xfa489411,0x9303e34b,0x980eea45,0x8519f157,0x8e14f859,0xbf37c773,0xb43ace7d,0xa92dd56f,0xa220dc61,0xf66d76ad,0xfd607fa3,0xe07764b1,0xeb7a6dbf,0xda595295,0xd1545b9b,0xcc434089,0xc74e4987,0xae053edd,0xa50837d3,0xb81f2cc1,0xb31225cf,0x82311ae5,0x893c13eb,0x942b08f9,0x9f2601f7,0x46bde64d,0x4db0ef43,0x50a7f451,0x5baafd5f,0x6a89c275,0x6184cb7b,0x7c93d069,0x779ed967,0x1ed5ae3d,0x15d8a733,0x08cfbc21,0x03c2b52f,0x32e18a05,0x39ec830b,0x24fb9819,0x2ff69117,0x8dd64d76,0x86db4478,0x9bcc5f6a,0x90c15664,0xa1e2694e,0xaaef6040,0xb7f87b52,0xbcf5725c,0xd5be0506,0xdeb30c08,0xc3a4171a,0xc8a91e14,0xf98a213e,0xf2872830,0xef903322,0xe49d3a2c,0x3d06dd96,0x360bd498,0x2b1ccf8a,0x2011c684,0x1132f9ae,0x1a3ff0a0,0x0728ebb2,0x0c25e2bc,0x656e95e6,0x6e639ce8,0x737487fa,0x78798ef4,0x495ab1de,0x4257b8d0,0x5f40a3c2,0x544daacc,0xf7daec41,0xfcd7e54f,0xe1c0fe5d,0xeacdf753,0xdbeec879,0xd0e3c177,0xcdf4da65,0xc6f9d36b,0xafb2a431,0xa4bfad3f,0xb9a8b62d,0xb2a5bf23,0x83868009,0x888b8907,0x959c9215,0x9e919b1b,0x470a7ca1,0x4c0775af,0x51106ebd,0x5a1d67b3,0x6b3e5899,0x60335197,0x7d244a85,0x7629438b,0x1f6234d1,0x146f3ddf,0x097826cd,0x02752fc3,0x335610e9,0x385b19e7,0x254c02f5,0x2e410bfb,0x8c61d79a,0x876cde94,0x9a7bc586,0x9176cc88,0xa055f3a2,0xab58faac,0xb64fe1be,0xbd42e8b0,0xd4099fea,0xdf0496e4,0xc2138df6,0xc91e84f8,0xf83dbbd2,0xf330b2dc,0xee27a9ce,0xe52aa0c0,0x3cb1477a,0x37bc4e74,0x2aab5566,0x21a65c68,0x10856342,0x1b886a4c,0x069f715e,0x0d927850,0x64d90f0a,0x6fd40604,0x72c31d16,0x79ce1418,0x48ed2b32,0x43e0223c,0x5ef7392e,0x55fa3020,0x01b79aec,0x0aba93e2,0x17ad88f0,0x1ca081fe,0x2d83bed4,0x268eb7da,0x3b99acc8,0x3094a5c6,0x59dfd29c,0x52d2db92,0x4fc5c080,0x44c8c98e,0x75ebf6a4,0x7ee6ffaa,0x63f1e4b8,0x68fcedb6,0xb1670a0c,0xba6a0302,0xa77d1810,0xac70111e,0x9d532e34,0x965e273a,0x8b493c28,0x80443526,0xe90f427c,0xe2024b72,0xff155060,0xf418596e,0xc53b6644,0xce366f4a,0xd3217458,0xd82c7d56,0x7a0ca137,0x7101a839,0x6c16b32b,0x671bba25,0x5638850f,0x5d358c01,0x40229713,0x4b2f9e1d,0x2264e947,0x2969e049,0x347efb5b,0x3f73f255,0x0e50cd7f,0x055dc471,0x184adf63,0x1347d66d,0xcadc31d7,0xc1d138d9,0xdcc623cb,0xd7cb2ac5,0xe6e815ef,0xede51ce1,0xf0f207f3,0xfbff0efd,0x92b479a7,0x99b970a9,0x84ae6bbb,0x8fa362b5,0xbe805d9f,0xb58d5491,0xa89a4f83,0xa397468d,},
{0x00000000,0x0d090e0b,0x1a121c16,0x171b121d,0x3424382c,0x392d3627,0x2e36243a,0x233f2a31,0x68487058,0x65417e53,0x725a6c4e,0x7f536245,0x5c6c4874,0x5165467f,0x467e5462,0x4b775a69,0xd090e0b0,0xdd99eebb,0xca82fca6,0xc78bf2ad,0xe4b4d89c,0xe9bdd697,0xfea6c48a,0xf3afca81,0xb8d890e8,0xb5d19ee3,0xa2ca8cfe,0xafc382f5,0x8cfca8c4,0x81f5a6cf,0x96eeb4d2,0x9be7bad9,0xbb3bdb7b,0xb632d570,0xa129c76d,0xac20c966,0x8f1fe357,0x8216ed5c,0x950dff41,0x9804f14a,0xd373ab23,0xde7aa528,0xc961b735,0xc468b93e,0xe757930f,0xea5e9d04,0xfd458f19,0xf04c8112,0x6bab3bcb,0x66a235c0,0x71b927dd,0x7cb029d6,0x5f8f03e7,0x52860dec,0x459d1ff1,0x489411fa,0x03e34b93,0x0eea4598,0x19f15785,0x14f8598e,0x37c773bf,0x3ace7db4,0x2dd56fa9,0x20dc61a2,0x6d76adf6,0x607fa3fd,0x7764b1e0,0x7a6dbfeb,0x595295da,0x545b9bd1,0x434089cc,0x4e4987c7,0x053eddae,0x0837d3a5,0x1f2cc1b8,0x1225cfb3,0x311ae582,0x3c13eb89,0x2b08f994,0x2601f79f,0xbde64d46,0xb0ef434d,0xa7f45150,0xaafd5f5b,0x89c2756a,0x84cb7b61,0x93d0697c,0x9ed96777,0xd5ae3d1e,0xd8a73315,0xcfbc2108,0xc2b52f03,0xe18a0532,0xec830b39,0xfb981924,0xf691172f,0xd64d768d,0xdb447886,0xcc5f6a9b,0xc1566490,0xe2694ea1,0xef6040aa,0xf87b52b7,0xf5725cbc,0xbe0506d5,0xb30c08de,0xa4171ac3,0xa91e14c8,0x8a213ef9,0x872830f2,0x903322ef,0x9d3a2ce4,0x06dd963d,0x0bd49836,0x1ccf8a2b,0x11c68420,0x32f9ae11,0x3ff0a01a,0x28ebb207,0x25e2bc0c,0x6e95e665,0x639ce86e,0x7487fa73,0x798ef478,0x5ab1de49,0x57b8d042,0x40a3c25f,0x4daacc54,0xdaec41f7,0xd7e54ffc,0xc0fe5de1,0xcdf753ea,0xeec879db,0xe3c177d0,0xf4da65cd,0xf9d36bc6,0xb2a431af,0xbfad3fa4,0xa8b62db9,0xa5bf23b2,0x86800983,0x8b890788,0x9c921595,0x919b1b9e,0x0a7ca147,0x0775af4c,0x106ebd51,0x1d67b35a,0x3e58996b,0x33519760,0x244a857d,0x29438b76,0x6234d11f,0x6f3ddf14,0x7826cd09,0x752fc302,0x5610e933,0x5b19e738,0x4c02f525,0x410bfb2e,0x61d79a8c,0x6cde9487,0x7bc5869a,0x76cc8891,0x55f3a2a0,0x58faacab,0x4fe1beb6,0x42e8b0bd,0x099fead4,0x0496e4df,0x138df6c2,0x1e84f8c9,0x3dbbd2f8,0x30b2dcf3,0x27a9ceee,0x2aa0c0e5,0xb1477a3c,0xbc4e7437,0xab55662a,0xa65c6821,0x85634210,0x886a4c1b,0x9f715e06,0x9278500d,0xd90f0a64,0xd406046f,0xc31d1672,0xce141879,0xed2b3248,0xe0223c43,0xf7392e5e,0xfa302055,0xb79aec01,0xba93e20a,0xad88f017,0xa081fe1c,0x83bed42d,0x8eb7da26,0x99acc83b,0x94a5c630,0xdfd29c59,0xd2db9252,0xc5c0804f,0xc8c98e44,0xebf6a475,0xe6ffaa7e,0xf1e4b863,0xfcedb668,0x670a0cb1,0x6a0302ba,0x7d1810a7,0x70111eac,0x532e349d,0x5e273a96,0x493c288b,0x44352680,0x0f427ce9,0x024b72e2,0x155060ff,0x18596ef4,0x3b6644c5,0x366f4ace,0x217458d3,0x2c7d56d8,0x0ca1377a,0x01a83971,0x16b32b6c,0x1bba2567,0x38850f56,0x358c015d,0x22971340,0x2f9e1d4b,0x64e94722,0x69e04929,0x7efb5b34,0x73f2553f,0x50cd7f0e,0x5dc47105,0x4adf6318,0x47d66d13,0xdc31d7ca,0xd138d9c1,0xc623cbdc,0xcb2ac5d7,0xe815efe6,0xe51ce1ed,0xf207f3f0,0xff0efdfb,0xb479a792,0xb970a999,0xae6bbb84,0xa362b58f,0x805d9fbe,0x8d5491b5,0x9a4f83a8,0x97468da3,},
{0x00000000,0x090e0b0d,0x121c161a,0x1b121d17,0x24382c34,0x2d362739,0x36243a2e,0x3f2a3123,0x48705868,0x417e5365,0x5a6c4e72,0x5362457f,0x6c48745c,0x65467f51,0x7e546246,0x775a694b,0x90e0b0d0,0x99eebbdd,0x82fca6ca,0x8bf2adc7,0xb4d89ce4,0xbdd697e9,0xa6c48afe,0xafca81f3,0xd890e8b8,0xd19ee3b5,0xca8cfea2,0xc382f5af,0xfca8c48c,0xf5a6cf81,0xeeb4d296,0xe7bad99b,0x3bdb7bbb,0x32d570b6,0x29c76da1,0x20c966ac,0x1fe3578f,0x16ed5c82,0x0dff4195,0x04f14a98,0x73ab23d3,0x7aa528de,0x61b735c9,0x68b93ec4,0x57930fe7,0x5e9d04ea,0x458f19fd,0x4c8112f0,0xab3bcb6b,0xa235c066,0xb927dd71,0xb029d67c,0x8f03e75f,0x860dec52,0x9d1ff145,0x9411fa48,0xe34b9303,0xea45980e,0xf1578519,0xf8598e14,0xc773bf37,0xce7db43a,0xd56fa92d,0xdc61a220,0x76adf66d,0x7fa3fd60,0x64b1e077,0x6dbfeb7a,0x5295da59,0x5b9bd154,0x4089cc43,0x4987c74e,0x3eddae05,0x37d3a508,0x2cc1b81f,0x25cfb312,0x1ae58231,0x13eb893c,0x08f9942b,0x01f79f26,0xe64d46bd,0xef434db0,0xf45150a7,0xfd5f5baa,0xc2756a89,0xcb7b6184,0xd0697c93,0xd967779e,0xae3d1ed5,0xa73315d8,0xbc2108cf,0xb52f03c2,0x8a0532e1,0x830b39ec,0x981924fb,0x91172ff6,0x4d768dd6,0x447886db,0x5f6a9bcc,0x566490c1,0x694ea1e2,0x6040aaef,0x7b52b7f8,0x725cbcf5,0x0506d5be,0x0c08deb3,0x171ac3a4,0x1e14c8a9,0x213ef98a,0x2830f287,0x3322ef90,0x3a2ce49d,0xdd963d06,0xd498360b,0xcf8a2b1c,0xc6842011,0xf9ae1132,0xf0a01a3f,0xebb20728,0xe2bc0c25,0x95e6656e,0x9ce86e63,0x87fa7374,0x8ef47879,0xb1de495a,0xb8d04257,0xa3c25f40,0xaacc544d,0xec41f7da,0xe54ffcd7,0xfe5de1c0,0xf753eacd,0xc879dbee,0xc177d0e3,0xda65cdf4,0xd36bc6f9,0xa431afb2,0xad3fa4bf,0xb62db9a8,0xbf23b2a5,0x80098386,0x8907888b,0x9215959c,0x9b1b9e91,0x7ca1470a,0x75af4c07,0x6ebd5110,0x67b35a1d,0x58996b3e,0x51976033,0x4a857d24,0x438b7629,0x34d11f62,0x3ddf146f,0x26cd0978,0x2fc30275,0x10e93356,0x19e7385b,0x02f5254c,0x0bfb2e41,0xd79a8c61,0xde94876c,0xc5869a7b,0xcc889176,0xf3a2a055,0xfaacab58,0xe1beb64f,0xe8b0bd42,0x9fead409,0x96e4df04,0x8df6c213,0x84f8c91e,0xbbd2f83d,0xb2dcf330,0xa9ceee27,0xa0c0e52a,0x477a3cb1,0x4e7437bc,0x55662aab,0x5c6821a6,0x63421085,0x6a4c1b88,0x715e069f,0x78500d92,0x0f0a64d9,0x06046fd4,0x1d1672c3,0x141879ce,0x2b3248ed,0x223c43e0,0x392e5ef7,0x302055fa,0x9aec01b7,0x93e20aba,0x88f017ad,0x81fe1ca0,0xbed42d83,0xb7da268e,0xacc83b99,0xa5c63094,0xd29c59df,0xdb9252d2,0xc0804fc5,0xc98e44c8,0xf6a475eb,0xffaa7ee6,0xe4b863f1,0xedb668fc,0x0a0cb167,0x0302ba6a,0x1810a77d,0x111eac70,0x2e349d53,0x273a965e,0x3c288b49,0x35268044,0x427ce90f,0x4b72e202,0x5060ff15,0x596ef418,0x6644c53b,0x6f4ace36,0x7458d321,0x7d56d82c,0xa1377a0c,0xa8397101,0xb32b6c16,0xba25671b,0x850f5638,0x8c015d35,0x97134022,0x9e1d4b2f,0xe9472264,0xe0492969,0xfb5b347e,0xf2553f73,0xcd7f0e50,0xc471055d,0xdf63184a,0xd66d1347,0x31d7cadc,0x38d9c1d1,0x23cbdcc6,0x2ac5d7cb,0x15efe6e8,0x1ce1ede5,0x07f3f0f2,0x0efdfbff,0x79a792b4,0x70a999b9,0x6bbb84ae,0x62b58fa3,0x5d9fbe80,0x5491b58d,0x4f83a89a,0x468da397,},
{0x00000000,0x0e0b0d09,0x1c161a12,0x121d171b,0x382c3424,0x3627392d,0x243a2e36,0x2a31233f,0x70586848,0x7e536541,0x6c4e725a,0x62457f53,0x48745c6c,0x467f5165,0x5462467e,0x5a694b77,0xe0b0d090,0xeebbdd99,0xfca6ca82,0xf2adc78b,0xd89ce4b4,0xd697e9bd,0xc48afea6,0xca81f3af,0x90e8b8d8,0x9ee3b5d1,0x8cfea2ca,0x82f5afc3,0xa8c48cfc,0xa6cf81f5,0xb4d296ee,0xbad99be7,0xdb7bbb3b,0xd570b632,0xc76da129,0xc966ac20,0xe3578f1f,0xed5c8216,0xff41950d,0xf14a9804,0xab23d373,0xa528de7a,0xb735c961,0xb93ec468,0x930fe757,0x9d04ea5e,0x8f19fd45,0x8112f04c,0x3bcb6bab,0x35c066a2,0x27dd71b9,0x29d67cb0,0x03e75f8f,0x0dec5286,0x1ff1459d,0x11fa4894,0x4b9303e3,0x45980eea,0x578519f1,0x598e14f8,0x73bf37c7,0x7db43ace,0x6fa92dd5,0x61a220dc,0xadf66d76,0xa3fd607f,0xb1e07764,0xbfeb7a6d,0x95da5952,0x9bd1545b,0x89cc4340,0x87c74e49,0xddae053e,0xd3a50837,0xc1b81f2c,0xcfb31225,0xe582311a,0xeb893c13,0xf9942b08,0xf79f2601,0x4d46bde6,0x434db0ef,0x5150a7f4,0x5f5baafd,0x756a89c2,0x7b6184cb,0x697c93d0,0x67779ed9,0x3d1ed5ae,0x3315d8a7,0x2108cfbc,0x2f03c2b5,0x0532e18a,0x0b39ec83,0x1924fb98,0x172ff691,0x768dd64d,0x7886db44,0x6a9bcc5f,0x6490c156,0x4ea1e269,0x40aaef60,0x52b7f87b,0x5cbcf572,0x06d5be05,0x08deb30c,0x1ac3a417,0x14c8a91e,0x3ef98a21,0x30f28728,0x22ef9033,0x2ce49d3a,0x963d06dd,0x98360bd4,0x8a2b1ccf,0x842011c6,0xae1132f9,0xa01a3ff0,0xb20728eb,0xbc0c25e2,0xe6656e95,0xe86e639c,0xfa737487,0xf478798e,0xde495ab1,0xd04257b8,0xc25f40a3,0xcc544daa,0x41f7daec,0x4ffcd7e5,0x5de1c0fe,0x53eacdf7,0x79dbeec8,0x77d0e3c1,0x65cdf4da,0x6bc6f9d3,0x31afb2a4,0x3fa4bfad,0x2db9a8b6,0x23b2a5bf,0x09838680,0x07888b89,0x15959c92,0x1b9e919b,0xa1470a7c,0xaf4c0775,0xbd51106e,0xb35a1d67,0x996b3e58,0x97603351,0x857d244a,0x8b762943,0xd11f6234,0xdf146f3d,0xcd097826,0xc302752f,0xe9335610,0xe7385b19,0xf5254c02,0xfb2e410b,0x9a8c61d7,0x94876cde,0x869a7bc5,0x889176cc,0xa2a055f3,0xacab58fa,0xbeb64fe1,0xb0bd42e8,0xead4099f,0xe4df0496,0xf6c2138d,0xf8c91e84,0xd2f83dbb,0xdcf330b2,0xceee27a9,0xc0e52aa0,0x7a3cb147,0x7437bc4e,0x662aab55,0x6821a65c,0x42108563,0x4c1b886a,0x5e069f71,0x500d9278,0x0a64d90f,0x046fd406,0x1672c31d,0x1879ce14,0x3248ed2b,0x3c43e022,0x2e5ef739,0x2055fa30,0xec01b79a,0xe20aba93,0xf017ad88,0xfe1ca081,0xd42d83be,0xda268eb7,0xc83b99ac,0xc63094a5,0x9c59dfd2,0x9252d2db,0x804fc5c0,0x8e44c8c9,0xa475ebf6,0xaa7ee6ff,0xb863f1e4,0xb668fced,0x0cb1670a,0x02ba6a03,0x10a77d18,0x1eac7011,0x349d532e,0x3a965e27,0x288b493c,0x26804435,0x7ce90f42,0x72e2024b,0x60ff1550,0x6ef41859,0x44c53b66,0x4ace366f,0x58d32174,0x56d82c7d,0x377a0ca1,0x397101a8,0x2b6c16b3,0x25671bba,0x0f563885,0x015d358c,0x13402297,0x1d4b2f9e,0x472264e9,0x492969e0,0x5b347efb,0x553f73f2,0x7f0e50cd,0x71055dc4,0x63184adf,0x6d1347d6,0xd7cadc31,0xd9c1d138,0xcbdcc623,0xc5d7cb2a,0xefe6e815,0xe1ede51c,0xf3f0f207,0xfdfbff0e,0xa792b479,0xa999b970,0xbb84ae6b,0xb58fa362,0x9fbe805d,0x91b58d54,0x83a89a4f,0x8da39746,},
};
#define MC1(col) *((uint32_t *)(col)) = MCtab[0][col[0]] ^ MCtab[1][col[1]] ^ MCtab[2][col[2]] ^ MCtab[3][col[3]]
#define iMC1(col) *((uint32_t *)(col)) = iMCtab[0][col[0]] ^ iMCtab[1][col[1]] ^ iMCtab[2][col[2]] ^ iMCtab[3][col[3]]
int main(int argc, char *argv[]) {
int nplains;
nplains = atoi(argv[1]);
char buf[123123];
FORN(i, nplains*4) {
sscanf(argv[2]+i*2, "%02x", buf + i);
}
for(uint64_t k = 0; k < 1ll << 32; k++) {
if ((k << 40) == 0) fprintf(stderr, "%08x\n", k);
int good = 1;
uint8_t seen[4][256] = {};
FORN(i, nplains) {
uint8_t col[4];
FORN(y, 4) col[y] = buf[i*4+y] ^ (k >> (y << 3));
FORN(y, 4) col[y] = rsbox[col[y]];
iMC1(col);
FORN(y, 4) {
if (seen[y][col[y]]) {
good = 0;
break;
};
seen[y][col[y]] = 1;
}
if (!good) break;
}
if (good) {
printf("good %08x\n", k);
return 0;
}
}
return 0;
}
#-*- coding:utf-8 -*-
from commands import getoutput
from aes import *
NPLAINS = 64
ivs = []
cts = []
for i in xrange(NPLAINS):
with open("data/iv%03d" % i) as f:
ivs.append(f.read())
with open("data/ct%03d" % i) as f:
cts.append(f.read())
keycols = [
# got in ~13 minutes from solve1.py
# 0: 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
[103, 213, 136, 127]
# 1: 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
[155, 59, 220, 246]
# 2: 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
[1, 200, 95, 216]
# 3: 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
[22, 190, 134, 28],
]
k4star = transpose(sum(keycols, []))
for x in xrange(4):
res = ""
for c in cts:
c = c[:16]
c = transpose(map(ord, c))
c = SRi(c)
c = AK(c, k4star)
c = SBi(c)
c = MCi(c)
c = SRi(c)
col = c[x::4]
res += "".join(map(chr, col))
print "# %d: %s" % (x, res.encode("hex"))
cmd = "./solve2 %d %s" % (NPLAINS, res.encode("hex"))
res = getoutput(cmd)
assert "good" in res
keycol = res.split()[-1].decode("hex")[::-1]
print map(ord, keycol), ","
#include <stdio.h>
#include <assert.h>
#define FORN(i, n) for(int i = 0; i < n; i++)
uint8_t sbox[256] = {
99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118, 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192, 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21, 4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117, 9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132, 83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207, 208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168, 81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210, 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115, 96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219, 224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121, 231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8, 186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138, 112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158, 225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223, 140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22
};
uint8_t rsbox[256] = {
82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215, 251, 124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222, 233, 203, 84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66, 250, 195, 78, 8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109, 139, 209, 37, 114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204, 93, 101, 182, 146, 108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87, 167, 141, 157, 132, 144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5, 184, 179, 69, 6, 208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1, 19, 138, 107, 58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240, 180, 230, 115, 150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232, 28, 117, 223, 110, 71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14, 170, 24, 190, 27, 252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254, 120, 205, 90, 244, 31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39, 128, 236, 95, 96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147, 201, 156, 239, 160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60, 131, 83, 153, 97, 23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85, 33, 12, 125
};
uint32_t MCtab[4][256] = {
{0x00000000,0x03010102,0x06020204,0x05030306,0x0c040408,0x0f05050a,0x0a06060c,0x0907070e,0x18080810,0x1b090912,0x1e0a0a14,0x1d0b0b16,0x140c0c18,0x170d0d1a,0x120e0e1c,0x110f0f1e,0x30101020,0x33111122,0x36121224,0x35131326,0x3c141428,0x3f15152a,0x3a16162c,0x3917172e,0x28181830,0x2b191932,0x2e1a1a34,0x2d1b1b36,0x241c1c38,0x271d1d3a,0x221e1e3c,0x211f1f3e,0x60202040,0x63212142,0x66222244,0x65232346,0x6c242448,0x6f25254a,0x6a26264c,0x6927274e,0x78282850,0x7b292952,0x7e2a2a54,0x7d2b2b56,0x742c2c58,0x772d2d5a,0x722e2e5c,0x712f2f5e,0x50303060,0x53313162,0x56323264,0x55333366,0x5c343468,0x5f35356a,0x5a36366c,0x5937376e,0x48383870,0x4b393972,0x4e3a3a74,0x4d3b3b76,0x443c3c78,0x473d3d7a,0x423e3e7c,0x413f3f7e,0xc0404080,0xc3414182,0xc6424284,0xc5434386,0xcc444488,0xcf45458a,0xca46468c,0xc947478e,0xd8484890,0xdb494992,0xde4a4a94,0xdd4b4b96,0xd44c4c98,0xd74d4d9a,0xd24e4e9c,0xd14f4f9e,0xf05050a0,0xf35151a2,0xf65252a4,0xf55353a6,0xfc5454a8,0xff5555aa,0xfa5656ac,0xf95757ae,0xe85858b0,0xeb5959b2,0xee5a5ab4,0xed5b5bb6,0xe45c5cb8,0xe75d5dba,0xe25e5ebc,0xe15f5fbe,0xa06060c0,0xa36161c2,0xa66262c4,0xa56363c6,0xac6464c8,0xaf6565ca,0xaa6666cc,0xa96767ce,0xb86868d0,0xbb6969d2,0xbe6a6ad4,0xbd6b6bd6,0xb46c6cd8,0xb76d6dda,0xb26e6edc,0xb16f6fde,0x907070e0,0x937171e2,0x967272e4,0x957373e6,0x9c7474e8,0x9f7575ea,0x9a7676ec,0x997777ee,0x887878f0,0x8b7979f2,0x8e7a7af4,0x8d7b7bf6,0x847c7cf8,0x877d7dfa,0x827e7efc,0x817f7ffe,0x9b80801b,0x98818119,0x9d82821f,0x9e83831d,0x97848413,0x94858511,0x91868617,0x92878715,0x8388880b,0x80898909,0x858a8a0f,0x868b8b0d,0x8f8c8c03,0x8c8d8d01,0x898e8e07,0x8a8f8f05,0xab90903b,0xa8919139,0xad92923f,0xae93933d,0xa7949433,0xa4959531,0xa1969637,0xa2979735,0xb398982b,0xb0999929,0xb59a9a2f,0xb69b9b2d,0xbf9c9c23,0xbc9d9d21,0xb99e9e27,0xba9f9f25,0xfba0a05b,0xf8a1a159,0xfda2a25f,0xfea3a35d,0xf7a4a453,0xf4a5a551,0xf1a6a657,0xf2a7a755,0xe3a8a84b,0xe0a9a949,0xe5aaaa4f,0xe6abab4d,0xefacac43,0xecadad41,0xe9aeae47,0xeaafaf45,0xcbb0b07b,0xc8b1b179,0xcdb2b27f,0xceb3b37d,0xc7b4b473,0xc4b5b571,0xc1b6b677,0xc2b7b775,0xd3b8b86b,0xd0b9b969,0xd5baba6f,0xd6bbbb6d,0xdfbcbc63,0xdcbdbd61,0xd9bebe67,0xdabfbf65,0x5bc0c09b,0x58c1c199,0x5dc2c29f,0x5ec3c39d,0x57c4c493,0x54c5c591,0x51c6c697,0x52c7c795,0x43c8c88b,0x40c9c989,0x45caca8f,0x46cbcb8d,0x4fcccc83,0x4ccdcd81,0x49cece87,0x4acfcf85,0x6bd0d0bb,0x68d1d1b9,0x6dd2d2bf,0x6ed3d3bd,0x67d4d4b3,0x64d5d5b1,0x61d6d6b7,0x62d7d7b5,0x73d8d8ab,0x70d9d9a9,0x75dadaaf,0x76dbdbad,0x7fdcdca3,0x7cdddda1,0x79dedea7,0x7adfdfa5,0x3be0e0db,0x38e1e1d9,0x3de2e2df,0x3ee3e3dd,0x37e4e4d3,0x34e5e5d1,0x31e6e6d7,0x32e7e7d5,0x23e8e8cb,0x20e9e9c9,0x25eaeacf,0x26ebebcd,0x2fececc3,0x2cededc1,0x29eeeec7,0x2aefefc5,0x0bf0f0fb,0x08f1f1f9,0x0df2f2ff,0x0ef3f3fd,0x07f4f4f3,0x04f5f5f1,0x01f6f6f7,0x02f7f7f5,0x13f8f8eb,0x10f9f9e9,0x15fafaef,0x16fbfbed,0x1ffcfce3,0x1cfdfde1,0x19fefee7,0x1affffe5,},
{0x00000000,0x01010203,0x02020406,0x03030605,0x0404080c,0x05050a0f,0x06060c0a,0x07070e09,0x08081018,0x0909121b,0x0a0a141e,0x0b0b161d,0x0c0c1814,0x0d0d1a17,0x0e0e1c12,0x0f0f1e11,0x10102030,0x11112233,0x12122436,0x13132635,0x1414283c,0x15152a3f,0x16162c3a,0x17172e39,0x18183028,0x1919322b,0x1a1a342e,0x1b1b362d,0x1c1c3824,0x1d1d3a27,0x1e1e3c22,0x1f1f3e21,0x20204060,0x21214263,0x22224466,0x23234665,0x2424486c,0x25254a6f,0x26264c6a,0x27274e69,0x28285078,0x2929527b,0x2a2a547e,0x2b2b567d,0x2c2c5874,0x2d2d5a77,0x2e2e5c72,0x2f2f5e71,0x30306050,0x31316253,0x32326456,0x33336655,0x3434685c,0x35356a5f,0x36366c5a,0x37376e59,0x38387048,0x3939724b,0x3a3a744e,0x3b3b764d,0x3c3c7844,0x3d3d7a47,0x3e3e7c42,0x3f3f7e41,0x404080c0,0x414182c3,0x424284c6,0x434386c5,0x444488cc,0x45458acf,0x46468cca,0x47478ec9,0x484890d8,0x494992db,0x4a4a94de,0x4b4b96dd,0x4c4c98d4,0x4d4d9ad7,0x4e4e9cd2,0x4f4f9ed1,0x5050a0f0,0x5151a2f3,0x5252a4f6,0x5353a6f5,0x5454a8fc,0x5555aaff,0x5656acfa,0x5757aef9,0x5858b0e8,0x5959b2eb,0x5a5ab4ee,0x5b5bb6ed,0x5c5cb8e4,0x5d5dbae7,0x5e5ebce2,0x5f5fbee1,0x6060c0a0,0x6161c2a3,0x6262c4a6,0x6363c6a5,0x6464c8ac,0x6565caaf,0x6666ccaa,0x6767cea9,0x6868d0b8,0x6969d2bb,0x6a6ad4be,0x6b6bd6bd,0x6c6cd8b4,0x6d6ddab7,0x6e6edcb2,0x6f6fdeb1,0x7070e090,0x7171e293,0x7272e496,0x7373e695,0x7474e89c,0x7575ea9f,0x7676ec9a,0x7777ee99,0x7878f088,0x7979f28b,0x7a7af48e,0x7b7bf68d,0x7c7cf884,0x7d7dfa87,0x7e7efc82,0x7f7ffe81,0x80801b9b,0x81811998,0x82821f9d,0x83831d9e,0x84841397,0x85851194,0x86861791,0x87871592,0x88880b83,0x89890980,0x8a8a0f85,0x8b8b0d86,0x8c8c038f,0x8d8d018c,0x8e8e0789,0x8f8f058a,0x90903bab,0x919139a8,0x92923fad,0x93933dae,0x949433a7,0x959531a4,0x969637a1,0x979735a2,0x98982bb3,0x999929b0,0x9a9a2fb5,0x9b9b2db6,0x9c9c23bf,0x9d9d21bc,0x9e9e27b9,0x9f9f25ba,0xa0a05bfb,0xa1a159f8,0xa2a25ffd,0xa3a35dfe,0xa4a453f7,0xa5a551f4,0xa6a657f1,0xa7a755f2,0xa8a84be3,0xa9a949e0,0xaaaa4fe5,0xabab4de6,0xacac43ef,0xadad41ec,0xaeae47e9,0xafaf45ea,0xb0b07bcb,0xb1b179c8,0xb2b27fcd,0xb3b37dce,0xb4b473c7,0xb5b571c4,0xb6b677c1,0xb7b775c2,0xb8b86bd3,0xb9b969d0,0xbaba6fd5,0xbbbb6dd6,0xbcbc63df,0xbdbd61dc,0xbebe67d9,0xbfbf65da,0xc0c09b5b,0xc1c19958,0xc2c29f5d,0xc3c39d5e,0xc4c49357,0xc5c59154,0xc6c69751,0xc7c79552,0xc8c88b43,0xc9c98940,0xcaca8f45,0xcbcb8d46,0xcccc834f,0xcdcd814c,0xcece8749,0xcfcf854a,0xd0d0bb6b,0xd1d1b968,0xd2d2bf6d,0xd3d3bd6e,0xd4d4b367,0xd5d5b164,0xd6d6b761,0xd7d7b562,0xd8d8ab73,0xd9d9a970,0xdadaaf75,0xdbdbad76,0xdcdca37f,0xdddda17c,0xdedea779,0xdfdfa57a,0xe0e0db3b,0xe1e1d938,0xe2e2df3d,0xe3e3dd3e,0xe4e4d337,0xe5e5d134,0xe6e6d731,0xe7e7d532,0xe8e8cb23,0xe9e9c920,0xeaeacf25,0xebebcd26,0xececc32f,0xededc12c,0xeeeec729,0xefefc52a,0xf0f0fb0b,0xf1f1f908,0xf2f2ff0d,0xf3f3fd0e,0xf4f4f307,0xf5f5f104,0xf6f6f701,0xf7f7f502,0xf8f8eb13,0xf9f9e910,0xfafaef15,0xfbfbed16,0xfcfce31f,0xfdfde11c,0xfefee719,0xffffe51a,},
{0x00000000,0x01020301,0x02040602,0x03060503,0x04080c04,0x050a0f05,0x060c0a06,0x070e0907,0x08101808,0x09121b09,0x0a141e0a,0x0b161d0b,0x0c18140c,0x0d1a170d,0x0e1c120e,0x0f1e110f,0x10203010,0x11223311,0x12243612,0x13263513,0x14283c14,0x152a3f15,0x162c3a16,0x172e3917,0x18302818,0x19322b19,0x1a342e1a,0x1b362d1b,0x1c38241c,0x1d3a271d,0x1e3c221e,0x1f3e211f,0x20406020,0x21426321,0x22446622,0x23466523,0x24486c24,0x254a6f25,0x264c6a26,0x274e6927,0x28507828,0x29527b29,0x2a547e2a,0x2b567d2b,0x2c58742c,0x2d5a772d,0x2e5c722e,0x2f5e712f,0x30605030,0x31625331,0x32645632,0x33665533,0x34685c34,0x356a5f35,0x366c5a36,0x376e5937,0x38704838,0x39724b39,0x3a744e3a,0x3b764d3b,0x3c78443c,0x3d7a473d,0x3e7c423e,0x3f7e413f,0x4080c040,0x4182c341,0x4284c642,0x4386c543,0x4488cc44,0x458acf45,0x468cca46,0x478ec947,0x4890d848,0x4992db49,0x4a94de4a,0x4b96dd4b,0x4c98d44c,0x4d9ad74d,0x4e9cd24e,0x4f9ed14f,0x50a0f050,0x51a2f351,0x52a4f652,0x53a6f553,0x54a8fc54,0x55aaff55,0x56acfa56,0x57aef957,0x58b0e858,0x59b2eb59,0x5ab4ee5a,0x5bb6ed5b,0x5cb8e45c,0x5dbae75d,0x5ebce25e,0x5fbee15f,0x60c0a060,0x61c2a361,0x62c4a662,0x63c6a563,0x64c8ac64,0x65caaf65,0x66ccaa66,0x67cea967,0x68d0b868,0x69d2bb69,0x6ad4be6a,0x6bd6bd6b,0x6cd8b46c,0x6ddab76d,0x6edcb26e,0x6fdeb16f,0x70e09070,0x71e29371,0x72e49672,0x73e69573,0x74e89c74,0x75ea9f75,0x76ec9a76,0x77ee9977,0x78f08878,0x79f28b79,0x7af48e7a,0x7bf68d7b,0x7cf8847c,0x7dfa877d,0x7efc827e,0x7ffe817f,0x801b9b80,0x81199881,0x821f9d82,0x831d9e83,0x84139784,0x85119485,0x86179186,0x87159287,0x880b8388,0x89098089,0x8a0f858a,0x8b0d868b,0x8c038f8c,0x8d018c8d,0x8e07898e,0x8f058a8f,0x903bab90,0x9139a891,0x923fad92,0x933dae93,0x9433a794,0x9531a495,0x9637a196,0x9735a297,0x982bb398,0x9929b099,0x9a2fb59a,0x9b2db69b,0x9c23bf9c,0x9d21bc9d,0x9e27b99e,0x9f25ba9f,0xa05bfba0,0xa159f8a1,0xa25ffda2,0xa35dfea3,0xa453f7a4,0xa551f4a5,0xa657f1a6,0xa755f2a7,0xa84be3a8,0xa949e0a9,0xaa4fe5aa,0xab4de6ab,0xac43efac,0xad41ecad,0xae47e9ae,0xaf45eaaf,0xb07bcbb0,0xb179c8b1,0xb27fcdb2,0xb37dceb3,0xb473c7b4,0xb571c4b5,0xb677c1b6,0xb775c2b7,0xb86bd3b8,0xb969d0b9,0xba6fd5ba,0xbb6dd6bb,0xbc63dfbc,0xbd61dcbd,0xbe67d9be,0xbf65dabf,0xc09b5bc0,0xc19958c1,0xc29f5dc2,0xc39d5ec3,0xc49357c4,0xc59154c5,0xc69751c6,0xc79552c7,0xc88b43c8,0xc98940c9,0xca8f45ca,0xcb8d46cb,0xcc834fcc,0xcd814ccd,0xce8749ce,0xcf854acf,0xd0bb6bd0,0xd1b968d1,0xd2bf6dd2,0xd3bd6ed3,0xd4b367d4,0xd5b164d5,0xd6b761d6,0xd7b562d7,0xd8ab73d8,0xd9a970d9,0xdaaf75da,0xdbad76db,0xdca37fdc,0xdda17cdd,0xdea779de,0xdfa57adf,0xe0db3be0,0xe1d938e1,0xe2df3de2,0xe3dd3ee3,0xe4d337e4,0xe5d134e5,0xe6d731e6,0xe7d532e7,0xe8cb23e8,0xe9c920e9,0xeacf25ea,0xebcd26eb,0xecc32fec,0xedc12ced,0xeec729ee,0xefc52aef,0xf0fb0bf0,0xf1f908f1,0xf2ff0df2,0xf3fd0ef3,0xf4f307f4,0xf5f104f5,0xf6f701f6,0xf7f502f7,0xf8eb13f8,0xf9e910f9,0xfaef15fa,0xfbed16fb,0xfce31ffc,0xfde11cfd,0xfee719fe,0xffe51aff,},
{0x00000000,0x02030101,0x04060202,0x06050303,0x080c0404,0x0a0f0505,0x0c0a0606,0x0e090707,0x10180808,0x121b0909,0x141e0a0a,0x161d0b0b,0x18140c0c,0x1a170d0d,0x1c120e0e,0x1e110f0f,0x20301010,0x22331111,0x24361212,0x26351313,0x283c1414,0x2a3f1515,0x2c3a1616,0x2e391717,0x30281818,0x322b1919,0x342e1a1a,0x362d1b1b,0x38241c1c,0x3a271d1d,0x3c221e1e,0x3e211f1f,0x40602020,0x42632121,0x44662222,0x46652323,0x486c2424,0x4a6f2525,0x4c6a2626,0x4e692727,0x50782828,0x527b2929,0x547e2a2a,0x567d2b2b,0x58742c2c,0x5a772d2d,0x5c722e2e,0x5e712f2f,0x60503030,0x62533131,0x64563232,0x66553333,0x685c3434,0x6a5f3535,0x6c5a3636,0x6e593737,0x70483838,0x724b3939,0x744e3a3a,0x764d3b3b,0x78443c3c,0x7a473d3d,0x7c423e3e,0x7e413f3f,0x80c04040,0x82c34141,0x84c64242,0x86c54343,0x88cc4444,0x8acf4545,0x8cca4646,0x8ec94747,0x90d84848,0x92db4949,0x94de4a4a,0x96dd4b4b,0x98d44c4c,0x9ad74d4d,0x9cd24e4e,0x9ed14f4f,0xa0f05050,0xa2f35151,0xa4f65252,0xa6f55353,0xa8fc5454,0xaaff5555,0xacfa5656,0xaef95757,0xb0e85858,0xb2eb5959,0xb4ee5a5a,0xb6ed5b5b,0xb8e45c5c,0xbae75d5d,0xbce25e5e,0xbee15f5f,0xc0a06060,0xc2a36161,0xc4a66262,0xc6a56363,0xc8ac6464,0xcaaf6565,0xccaa6666,0xcea96767,0xd0b86868,0xd2bb6969,0xd4be6a6a,0xd6bd6b6b,0xd8b46c6c,0xdab76d6d,0xdcb26e6e,0xdeb16f6f,0xe0907070,0xe2937171,0xe4967272,0xe6957373,0xe89c7474,0xea9f7575,0xec9a7676,0xee997777,0xf0887878,0xf28b7979,0xf48e7a7a,0xf68d7b7b,0xf8847c7c,0xfa877d7d,0xfc827e7e,0xfe817f7f,0x1b9b8080,0x19988181,0x1f9d8282,0x1d9e8383,0x13978484,0x11948585,0x17918686,0x15928787,0x0b838888,0x09808989,0x0f858a8a,0x0d868b8b,0x038f8c8c,0x018c8d8d,0x07898e8e,0x058a8f8f,0x3bab9090,0x39a89191,0x3fad9292,0x3dae9393,0x33a79494,0x31a49595,0x37a19696,0x35a29797,0x2bb39898,0x29b09999,0x2fb59a9a,0x2db69b9b,0x23bf9c9c,0x21bc9d9d,0x27b99e9e,0x25ba9f9f,0x5bfba0a0,0x59f8a1a1,0x5ffda2a2,0x5dfea3a3,0x53f7a4a4,0x51f4a5a5,0x57f1a6a6,0x55f2a7a7,0x4be3a8a8,0x49e0a9a9,0x4fe5aaaa,0x4de6abab,0x43efacac,0x41ecadad,0x47e9aeae,0x45eaafaf,0x7bcbb0b0,0x79c8b1b1,0x7fcdb2b2,0x7dceb3b3,0x73c7b4b4,0x71c4b5b5,0x77c1b6b6,0x75c2b7b7,0x6bd3b8b8,0x69d0b9b9,0x6fd5baba,0x6dd6bbbb,0x63dfbcbc,0x61dcbdbd,0x67d9bebe,0x65dabfbf,0x9b5bc0c0,0x9958c1c1,0x9f5dc2c2,0x9d5ec3c3,0x9357c4c4,0x9154c5c5,0x9751c6c6,0x9552c7c7,0x8b43c8c8,0x8940c9c9,0x8f45caca,0x8d46cbcb,0x834fcccc,0x814ccdcd,0x8749cece,0x854acfcf,0xbb6bd0d0,0xb968d1d1,0xbf6dd2d2,0xbd6ed3d3,0xb367d4d4,0xb164d5d5,0xb761d6d6,0xb562d7d7,0xab73d8d8,0xa970d9d9,0xaf75dada,0xad76dbdb,0xa37fdcdc,0xa17cdddd,0xa779dede,0xa57adfdf,0xdb3be0e0,0xd938e1e1,0xdf3de2e2,0xdd3ee3e3,0xd337e4e4,0xd134e5e5,0xd731e6e6,0xd532e7e7,0xcb23e8e8,0xc920e9e9,0xcf25eaea,0xcd26ebeb,0xc32fecec,0xc12ceded,0xc729eeee,0xc52aefef,0xfb0bf0f0,0xf908f1f1,0xff0df2f2,0xfd0ef3f3,0xf307f4f4,0xf104f5f5,0xf701f6f6,0xf502f7f7,0xeb13f8f8,0xe910f9f9,0xef15fafa,0xed16fbfb,0xe31ffcfc,0xe11cfdfd,0xe719fefe,0xe51affff,},
};
uint32_t iMCtab[4][256] = {
{0x00000000,0x0b0d090e,0x161a121c,0x1d171b12,0x2c342438,0x27392d36,0x3a2e3624,0x31233f2a,0x58684870,0x5365417e,0x4e725a6c,0x457f5362,0x745c6c48,0x7f516546,0x62467e54,0x694b775a,0xb0d090e0,0xbbdd99ee,0xa6ca82fc,0xadc78bf2,0x9ce4b4d8,0x97e9bdd6,0x8afea6c4,0x81f3afca,0xe8b8d890,0xe3b5d19e,0xfea2ca8c,0xf5afc382,0xc48cfca8,0xcf81f5a6,0xd296eeb4,0xd99be7ba,0x7bbb3bdb,0x70b632d5,0x6da129c7,0x66ac20c9,0x578f1fe3,0x5c8216ed,0x41950dff,0x4a9804f1,0x23d373ab,0x28de7aa5,0x35c961b7,0x3ec468b9,0x0fe75793,0x04ea5e9d,0x19fd458f,0x12f04c81,0xcb6bab3b,0xc066a235,0xdd71b927,0xd67cb029,0xe75f8f03,0xec52860d,0xf1459d1f,0xfa489411,0x9303e34b,0x980eea45,0x8519f157,0x8e14f859,0xbf37c773,0xb43ace7d,0xa92dd56f,0xa220dc61,0xf66d76ad,0xfd607fa3,0xe07764b1,0xeb7a6dbf,0xda595295,0xd1545b9b,0xcc434089,0xc74e4987,0xae053edd,0xa50837d3,0xb81f2cc1,0xb31225cf,0x82311ae5,0x893c13eb,0x942b08f9,0x9f2601f7,0x46bde64d,0x4db0ef43,0x50a7f451,0x5baafd5f,0x6a89c275,0x6184cb7b,0x7c93d069,0x779ed967,0x1ed5ae3d,0x15d8a733,0x08cfbc21,0x03c2b52f,0x32e18a05,0x39ec830b,0x24fb9819,0x2ff69117,0x8dd64d76,0x86db4478,0x9bcc5f6a,0x90c15664,0xa1e2694e,0xaaef6040,0xb7f87b52,0xbcf5725c,0xd5be0506,0xdeb30c08,0xc3a4171a,0xc8a91e14,0xf98a213e,0xf2872830,0xef903322,0xe49d3a2c,0x3d06dd96,0x360bd498,0x2b1ccf8a,0x2011c684,0x1132f9ae,0x1a3ff0a0,0x0728ebb2,0x0c25e2bc,0x656e95e6,0x6e639ce8,0x737487fa,0x78798ef4,0x495ab1de,0x4257b8d0,0x5f40a3c2,0x544daacc,0xf7daec41,0xfcd7e54f,0xe1c0fe5d,0xeacdf753,0xdbeec879,0xd0e3c177,0xcdf4da65,0xc6f9d36b,0xafb2a431,0xa4bfad3f,0xb9a8b62d,0xb2a5bf23,0x83868009,0x888b8907,0x959c9215,0x9e919b1b,0x470a7ca1,0x4c0775af,0x51106ebd,0x5a1d67b3,0x6b3e5899,0x60335197,0x7d244a85,0x7629438b,0x1f6234d1,0x146f3ddf,0x097826cd,0x02752fc3,0x335610e9,0x385b19e7,0x254c02f5,0x2e410bfb,0x8c61d79a,0x876cde94,0x9a7bc586,0x9176cc88,0xa055f3a2,0xab58faac,0xb64fe1be,0xbd42e8b0,0xd4099fea,0xdf0496e4,0xc2138df6,0xc91e84f8,0xf83dbbd2,0xf330b2dc,0xee27a9ce,0xe52aa0c0,0x3cb1477a,0x37bc4e74,0x2aab5566,0x21a65c68,0x10856342,0x1b886a4c,0x069f715e,0x0d927850,0x64d90f0a,0x6fd40604,0x72c31d16,0x79ce1418,0x48ed2b32,0x43e0223c,0x5ef7392e,0x55fa3020,0x01b79aec,0x0aba93e2,0x17ad88f0,0x1ca081fe,0x2d83bed4,0x268eb7da,0x3b99acc8,0x3094a5c6,0x59dfd29c,0x52d2db92,0x4fc5c080,0x44c8c98e,0x75ebf6a4,0x7ee6ffaa,0x63f1e4b8,0x68fcedb6,0xb1670a0c,0xba6a0302,0xa77d1810,0xac70111e,0x9d532e34,0x965e273a,0x8b493c28,0x80443526,0xe90f427c,0xe2024b72,0xff155060,0xf418596e,0xc53b6644,0xce366f4a,0xd3217458,0xd82c7d56,0x7a0ca137,0x7101a839,0x6c16b32b,0x671bba25,0x5638850f,0x5d358c01,0x40229713,0x4b2f9e1d,0x2264e947,0x2969e049,0x347efb5b,0x3f73f255,0x0e50cd7f,0x055dc471,0x184adf63,0x1347d66d,0xcadc31d7,0xc1d138d9,0xdcc623cb,0xd7cb2ac5,0xe6e815ef,0xede51ce1,0xf0f207f3,0xfbff0efd,0x92b479a7,0x99b970a9,0x84ae6bbb,0x8fa362b5,0xbe805d9f,0xb58d5491,0xa89a4f83,0xa397468d,},
{0x00000000,0x0d090e0b,0x1a121c16,0x171b121d,0x3424382c,0x392d3627,0x2e36243a,0x233f2a31,0x68487058,0x65417e53,0x725a6c4e,0x7f536245,0x5c6c4874,0x5165467f,0x467e5462,0x4b775a69,0xd090e0b0,0xdd99eebb,0xca82fca6,0xc78bf2ad,0xe4b4d89c,0xe9bdd697,0xfea6c48a,0xf3afca81,0xb8d890e8,0xb5d19ee3,0xa2ca8cfe,0xafc382f5,0x8cfca8c4,0x81f5a6cf,0x96eeb4d2,0x9be7bad9,0xbb3bdb7b,0xb632d570,0xa129c76d,0xac20c966,0x8f1fe357,0x8216ed5c,0x950dff41,0x9804f14a,0xd373ab23,0xde7aa528,0xc961b735,0xc468b93e,0xe757930f,0xea5e9d04,0xfd458f19,0xf04c8112,0x6bab3bcb,0x66a235c0,0x71b927dd,0x7cb029d6,0x5f8f03e7,0x52860dec,0x459d1ff1,0x489411fa,0x03e34b93,0x0eea4598,0x19f15785,0x14f8598e,0x37c773bf,0x3ace7db4,0x2dd56fa9,0x20dc61a2,0x6d76adf6,0x607fa3fd,0x7764b1e0,0x7a6dbfeb,0x595295da,0x545b9bd1,0x434089cc,0x4e4987c7,0x053eddae,0x0837d3a5,0x1f2cc1b8,0x1225cfb3,0x311ae582,0x3c13eb89,0x2b08f994,0x2601f79f,0xbde64d46,0xb0ef434d,0xa7f45150,0xaafd5f5b,0x89c2756a,0x84cb7b61,0x93d0697c,0x9ed96777,0xd5ae3d1e,0xd8a73315,0xcfbc2108,0xc2b52f03,0xe18a0532,0xec830b39,0xfb981924,0xf691172f,0xd64d768d,0xdb447886,0xcc5f6a9b,0xc1566490,0xe2694ea1,0xef6040aa,0xf87b52b7,0xf5725cbc,0xbe0506d5,0xb30c08de,0xa4171ac3,0xa91e14c8,0x8a213ef9,0x872830f2,0x903322ef,0x9d3a2ce4,0x06dd963d,0x0bd49836,0x1ccf8a2b,0x11c68420,0x32f9ae11,0x3ff0a01a,0x28ebb207,0x25e2bc0c,0x6e95e665,0x639ce86e,0x7487fa73,0x798ef478,0x5ab1de49,0x57b8d042,0x40a3c25f,0x4daacc54,0xdaec41f7,0xd7e54ffc,0xc0fe5de1,0xcdf753ea,0xeec879db,0xe3c177d0,0xf4da65cd,0xf9d36bc6,0xb2a431af,0xbfad3fa4,0xa8b62db9,0xa5bf23b2,0x86800983,0x8b890788,0x9c921595,0x919b1b9e,0x0a7ca147,0x0775af4c,0x106ebd51,0x1d67b35a,0x3e58996b,0x33519760,0x244a857d,0x29438b76,0x6234d11f,0x6f3ddf14,0x7826cd09,0x752fc302,0x5610e933,0x5b19e738,0x4c02f525,0x410bfb2e,0x61d79a8c,0x6cde9487,0x7bc5869a,0x76cc8891,0x55f3a2a0,0x58faacab,0x4fe1beb6,0x42e8b0bd,0x099fead4,0x0496e4df,0x138df6c2,0x1e84f8c9,0x3dbbd2f8,0x30b2dcf3,0x27a9ceee,0x2aa0c0e5,0xb1477a3c,0xbc4e7437,0xab55662a,0xa65c6821,0x85634210,0x886a4c1b,0x9f715e06,0x9278500d,0xd90f0a64,0xd406046f,0xc31d1672,0xce141879,0xed2b3248,0xe0223c43,0xf7392e5e,0xfa302055,0xb79aec01,0xba93e20a,0xad88f017,0xa081fe1c,0x83bed42d,0x8eb7da26,0x99acc83b,0x94a5c630,0xdfd29c59,0xd2db9252,0xc5c0804f,0xc8c98e44,0xebf6a475,0xe6ffaa7e,0xf1e4b863,0xfcedb668,0x670a0cb1,0x6a0302ba,0x7d1810a7,0x70111eac,0x532e349d,0x5e273a96,0x493c288b,0x44352680,0x0f427ce9,0x024b72e2,0x155060ff,0x18596ef4,0x3b6644c5,0x366f4ace,0x217458d3,0x2c7d56d8,0x0ca1377a,0x01a83971,0x16b32b6c,0x1bba2567,0x38850f56,0x358c015d,0x22971340,0x2f9e1d4b,0x64e94722,0x69e04929,0x7efb5b34,0x73f2553f,0x50cd7f0e,0x5dc47105,0x4adf6318,0x47d66d13,0xdc31d7ca,0xd138d9c1,0xc623cbdc,0xcb2ac5d7,0xe815efe6,0xe51ce1ed,0xf207f3f0,0xff0efdfb,0xb479a792,0xb970a999,0xae6bbb84,0xa362b58f,0x805d9fbe,0x8d5491b5,0x9a4f83a8,0x97468da3,},
{0x00000000,0x090e0b0d,0x121c161a,0x1b121d17,0x24382c34,0x2d362739,0x36243a2e,0x3f2a3123,0x48705868,0x417e5365,0x5a6c4e72,0x5362457f,0x6c48745c,0x65467f51,0x7e546246,0x775a694b,0x90e0b0d0,0x99eebbdd,0x82fca6ca,0x8bf2adc7,0xb4d89ce4,0xbdd697e9,0xa6c48afe,0xafca81f3,0xd890e8b8,0xd19ee3b5,0xca8cfea2,0xc382f5af,0xfca8c48c,0xf5a6cf81,0xeeb4d296,0xe7bad99b,0x3bdb7bbb,0x32d570b6,0x29c76da1,0x20c966ac,0x1fe3578f,0x16ed5c82,0x0dff4195,0x04f14a98,0x73ab23d3,0x7aa528de,0x61b735c9,0x68b93ec4,0x57930fe7,0x5e9d04ea,0x458f19fd,0x4c8112f0,0xab3bcb6b,0xa235c066,0xb927dd71,0xb029d67c,0x8f03e75f,0x860dec52,0x9d1ff145,0x9411fa48,0xe34b9303,0xea45980e,0xf1578519,0xf8598e14,0xc773bf37,0xce7db43a,0xd56fa92d,0xdc61a220,0x76adf66d,0x7fa3fd60,0x64b1e077,0x6dbfeb7a,0x5295da59,0x5b9bd154,0x4089cc43,0x4987c74e,0x3eddae05,0x37d3a508,0x2cc1b81f,0x25cfb312,0x1ae58231,0x13eb893c,0x08f9942b,0x01f79f26,0xe64d46bd,0xef434db0,0xf45150a7,0xfd5f5baa,0xc2756a89,0xcb7b6184,0xd0697c93,0xd967779e,0xae3d1ed5,0xa73315d8,0xbc2108cf,0xb52f03c2,0x8a0532e1,0x830b39ec,0x981924fb,0x91172ff6,0x4d768dd6,0x447886db,0x5f6a9bcc,0x566490c1,0x694ea1e2,0x6040aaef,0x7b52b7f8,0x725cbcf5,0x0506d5be,0x0c08deb3,0x171ac3a4,0x1e14c8a9,0x213ef98a,0x2830f287,0x3322ef90,0x3a2ce49d,0xdd963d06,0xd498360b,0xcf8a2b1c,0xc6842011,0xf9ae1132,0xf0a01a3f,0xebb20728,0xe2bc0c25,0x95e6656e,0x9ce86e63,0x87fa7374,0x8ef47879,0xb1de495a,0xb8d04257,0xa3c25f40,0xaacc544d,0xec41f7da,0xe54ffcd7,0xfe5de1c0,0xf753eacd,0xc879dbee,0xc177d0e3,0xda65cdf4,0xd36bc6f9,0xa431afb2,0xad3fa4bf,0xb62db9a8,0xbf23b2a5,0x80098386,0x8907888b,0x9215959c,0x9b1b9e91,0x7ca1470a,0x75af4c07,0x6ebd5110,0x67b35a1d,0x58996b3e,0x51976033,0x4a857d24,0x438b7629,0x34d11f62,0x3ddf146f,0x26cd0978,0x2fc30275,0x10e93356,0x19e7385b,0x02f5254c,0x0bfb2e41,0xd79a8c61,0xde94876c,0xc5869a7b,0xcc889176,0xf3a2a055,0xfaacab58,0xe1beb64f,0xe8b0bd42,0x9fead409,0x96e4df04,0x8df6c213,0x84f8c91e,0xbbd2f83d,0xb2dcf330,0xa9ceee27,0xa0c0e52a,0x477a3cb1,0x4e7437bc,0x55662aab,0x5c6821a6,0x63421085,0x6a4c1b88,0x715e069f,0x78500d92,0x0f0a64d9,0x06046fd4,0x1d1672c3,0x141879ce,0x2b3248ed,0x223c43e0,0x392e5ef7,0x302055fa,0x9aec01b7,0x93e20aba,0x88f017ad,0x81fe1ca0,0xbed42d83,0xb7da268e,0xacc83b99,0xa5c63094,0xd29c59df,0xdb9252d2,0xc0804fc5,0xc98e44c8,0xf6a475eb,0xffaa7ee6,0xe4b863f1,0xedb668fc,0x0a0cb167,0x0302ba6a,0x1810a77d,0x111eac70,0x2e349d53,0x273a965e,0x3c288b49,0x35268044,0x427ce90f,0x4b72e202,0x5060ff15,0x596ef418,0x6644c53b,0x6f4ace36,0x7458d321,0x7d56d82c,0xa1377a0c,0xa8397101,0xb32b6c16,0xba25671b,0x850f5638,0x8c015d35,0x97134022,0x9e1d4b2f,0xe9472264,0xe0492969,0xfb5b347e,0xf2553f73,0xcd7f0e50,0xc471055d,0xdf63184a,0xd66d1347,0x31d7cadc,0x38d9c1d1,0x23cbdcc6,0x2ac5d7cb,0x15efe6e8,0x1ce1ede5,0x07f3f0f2,0x0efdfbff,0x79a792b4,0x70a999b9,0x6bbb84ae,0x62b58fa3,0x5d9fbe80,0x5491b58d,0x4f83a89a,0x468da397,},
{0x00000000,0x0e0b0d09,0x1c161a12,0x121d171b,0x382c3424,0x3627392d,0x243a2e36,0x2a31233f,0x70586848,0x7e536541,0x6c4e725a,0x62457f53,0x48745c6c,0x467f5165,0x5462467e,0x5a694b77,0xe0b0d090,0xeebbdd99,0xfca6ca82,0xf2adc78b,0xd89ce4b4,0xd697e9bd,0xc48afea6,0xca81f3af,0x90e8b8d8,0x9ee3b5d1,0x8cfea2ca,0x82f5afc3,0xa8c48cfc,0xa6cf81f5,0xb4d296ee,0xbad99be7,0xdb7bbb3b,0xd570b632,0xc76da129,0xc966ac20,0xe3578f1f,0xed5c8216,0xff41950d,0xf14a9804,0xab23d373,0xa528de7a,0xb735c961,0xb93ec468,0x930fe757,0x9d04ea5e,0x8f19fd45,0x8112f04c,0x3bcb6bab,0x35c066a2,0x27dd71b9,0x29d67cb0,0x03e75f8f,0x0dec5286,0x1ff1459d,0x11fa4894,0x4b9303e3,0x45980eea,0x578519f1,0x598e14f8,0x73bf37c7,0x7db43ace,0x6fa92dd5,0x61a220dc,0xadf66d76,0xa3fd607f,0xb1e07764,0xbfeb7a6d,0x95da5952,0x9bd1545b,0x89cc4340,0x87c74e49,0xddae053e,0xd3a50837,0xc1b81f2c,0xcfb31225,0xe582311a,0xeb893c13,0xf9942b08,0xf79f2601,0x4d46bde6,0x434db0ef,0x5150a7f4,0x5f5baafd,0x756a89c2,0x7b6184cb,0x697c93d0,0x67779ed9,0x3d1ed5ae,0x3315d8a7,0x2108cfbc,0x2f03c2b5,0x0532e18a,0x0b39ec83,0x1924fb98,0x172ff691,0x768dd64d,0x7886db44,0x6a9bcc5f,0x6490c156,0x4ea1e269,0x40aaef60,0x52b7f87b,0x5cbcf572,0x06d5be05,0x08deb30c,0x1ac3a417,0x14c8a91e,0x3ef98a21,0x30f28728,0x22ef9033,0x2ce49d3a,0x963d06dd,0x98360bd4,0x8a2b1ccf,0x842011c6,0xae1132f9,0xa01a3ff0,0xb20728eb,0xbc0c25e2,0xe6656e95,0xe86e639c,0xfa737487,0xf478798e,0xde495ab1,0xd04257b8,0xc25f40a3,0xcc544daa,0x41f7daec,0x4ffcd7e5,0x5de1c0fe,0x53eacdf7,0x79dbeec8,0x77d0e3c1,0x65cdf4da,0x6bc6f9d3,0x31afb2a4,0x3fa4bfad,0x2db9a8b6,0x23b2a5bf,0x09838680,0x07888b89,0x15959c92,0x1b9e919b,0xa1470a7c,0xaf4c0775,0xbd51106e,0xb35a1d67,0x996b3e58,0x97603351,0x857d244a,0x8b762943,0xd11f6234,0xdf146f3d,0xcd097826,0xc302752f,0xe9335610,0xe7385b19,0xf5254c02,0xfb2e410b,0x9a8c61d7,0x94876cde,0x869a7bc5,0x889176cc,0xa2a055f3,0xacab58fa,0xbeb64fe1,0xb0bd42e8,0xead4099f,0xe4df0496,0xf6c2138d,0xf8c91e84,0xd2f83dbb,0xdcf330b2,0xceee27a9,0xc0e52aa0,0x7a3cb147,0x7437bc4e,0x662aab55,0x6821a65c,0x42108563,0x4c1b886a,0x5e069f71,0x500d9278,0x0a64d90f,0x046fd406,0x1672c31d,0x1879ce14,0x3248ed2b,0x3c43e022,0x2e5ef739,0x2055fa30,0xec01b79a,0xe20aba93,0xf017ad88,0xfe1ca081,0xd42d83be,0xda268eb7,0xc83b99ac,0xc63094a5,0x9c59dfd2,0x9252d2db,0x804fc5c0,0x8e44c8c9,0xa475ebf6,0xaa7ee6ff,0xb863f1e4,0xb668fced,0x0cb1670a,0x02ba6a03,0x10a77d18,0x1eac7011,0x349d532e,0x3a965e27,0x288b493c,0x26804435,0x7ce90f42,0x72e2024b,0x60ff1550,0x6ef41859,0x44c53b66,0x4ace366f,0x58d32174,0x56d82c7d,0x377a0ca1,0x397101a8,0x2b6c16b3,0x25671bba,0x0f563885,0x015d358c,0x13402297,0x1d4b2f9e,0x472264e9,0x492969e0,0x5b347efb,0x553f73f2,0x7f0e50cd,0x71055dc4,0x63184adf,0x6d1347d6,0xd7cadc31,0xd9c1d138,0xcbdcc623,0xc5d7cb2a,0xefe6e815,0xe1ede51c,0xf3f0f207,0xfdfbff0e,0xa792b479,0xa999b970,0xbb84ae6b,0xb58fa362,0x9fbe805d,0x91b58d54,0x83a89a4f,0x8da39746,},
};
#define MC1(col) *((uint32_t *)(col)) = MCtab[0][col[0]] ^ MCtab[1][col[1]] ^ MCtab[2][col[2]] ^ MCtab[3][col[3]]
#define iMC1(col) *((uint32_t *)(col)) = iMCtab[0][col[0]] ^ iMCtab[1][col[1]] ^ iMCtab[2][col[2]] ^ iMCtab[3][col[3]]
int main(int argc, char *argv[]) {
int nplains;
nplains = atoi(argv[1]);
char buf[123123];
FORN(i, nplains*4) {
sscanf(argv[2]+i*2, "%02x", buf + i);
}
for(uint64_t k = 0; k < 1ll << 32; k++) {
if ((k << 40) == 0) fprintf(stderr, "%08x\n", k);
uint8_t prev[4];
int good = 1;
int notuniq[4] = {};
FORN(i, nplains) {
uint8_t col[4];
FORN(y, 4) col[y] = buf[i*4+y] ^ (k >> (y << 3));
FORN(y, 4) col[y] = rsbox[col[y]];
iMC1(col);
FORN(y, 4) {
if (i > 0 && col[y] != prev[y])
notuniq[y] = 1;
prev[y] = col[y];
}
if (notuniq[0] + notuniq[1] + notuniq[2] + notuniq[3] > 1) {
good = 0;
break;
}
}
if (good) {
printf("good %08x\n", k);
return 0;
}
}
return 0;
}
#!/usr/bin/env python
#-*- coding:utf-8 -*-
from aes import *
NPLAINS = 64
def xor(a, b):
return "".join([chr(ord(a[i]) ^ ord(b[i % len(b)])) for i in xrange(len(a))])
keycols4 = [
# got in ~13 minutes from solve1.py
# 0: 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
[103, 213, 136, 127],
# 1: 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
[155, 59, 220, 246],
# 2: 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
[1, 200, 95, 216],
# 3: 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
[22, 190, 134, 28],
]
keycols3 = [
# got in ~10 seconds from solve2.py
# 0: 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
[133, 124, 86, 15],
# 1: 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
[119, 42, 66, 47],
# 2: 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
[222, 211, 189, 3],
# 3: 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
[212, 249, 217, 53],
]
ivs = []
cts = []
for i in xrange(NPLAINS):
with open("data/iv%03d" % i) as f:
ivs.append(f.read())
with open("data/ct%03d" % i) as f:
cts.append(f.read())
k4star = transpose(sum(keycols4, []))
k4 = SR(k4star)
k3star = transpose(sum(keycols3, []))
k3 = MC(SR(k3star))
kstate = transpose(k3) + transpose(k4)
def revert(expandedKey, currentSize, size=32):
while currentSize > 0:
res = expandedKey[size-4:size]
t = expandedKey[size-8:size-4]
if currentSize % size == 4:
rconIteration = 1 + currentSize / size
t = ks_core(t, rconIteration)
elif size == 32 and (currentSize % size) == 20:
for l in range(4):
t[l] = sbox[t[l]]
block = [a ^ b for a, b in zip(res, t)]
expandedKey = block + expandedKey
currentSize -= 4
return expandedKey
kstate = revert(kstate, 48)
k = "".join(map(chr, kstate[:32]))
set_key32(k, nr=14)
import aes
ct = cts[0]
iv = ivs[0]
flag = ""
for i in xrange(len(ct)/16):
flag += xor(iv, decrypt(ct[:16], nr=4))
iv = ct[:16]
ct = ct[16:]
print "flag:"
print `flag`
# hxp{cRypt0_f0R_tH3_IoT}
#!/usr/bin/python
import os
import sys
import math
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]
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]
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 ]
def transpose(s):
assert len(s) == 16
res = [0] * 16
for i in range(4):
for j in range(4):
res[j*4+i] = s[i*4 + j]
return res
# --------------------- KS ---------------------------------------------
def ks_rotate(word):
return word[1:] + word[:1]
def ks_core(word, iteration):
word = ks_rotate(word)
for i in range(4):
word[i] = sbox[word[i]]
word[0] = word[0] ^ Rcon[iteration]
return word
def ks_expand(key, size=16, expandedKeySize=16*11):
currentSize = 0
rconIteration = 1
expandedKey = [0] * expandedKeySize
for j in range(size):
expandedKey[j] = key[j]
currentSize += size
while currentSize < expandedKeySize:
t = expandedKey[currentSize-4:currentSize]
if currentSize % size == 0:
t = ks_core(t, rconIteration)
rconIteration += 1
if size == 32 and ((currentSize % size) == 16):
for l in range(4): t[l] = sbox[t[l]]
for m in range(4):
expandedKey[currentSize] = expandedKey[currentSize - size] ^ t[m]
currentSize += 1
res = []
for i in xrange(0, expandedKeySize, 16):
res.append( transpose(expandedKey[i:i+16]) )
return res
def gmul(a, b):
"""Galois multiplication of 8 bit characters a and b."""
p = 0
for counter in range(8):
if b & 1: p ^= a
hi_bit_set = a & 0x80
a <<= 1
# keep a 8 bit
a &= 0xFF
if hi_bit_set:
a ^= 0x1b
b >>= 1
return p
def AddRoundKey(state, key):
return [a ^ b for a, b in zip(state, key)]
def SubBytes(state, inverse=False):
return map( (rsbox if inverse else sbox).__getitem__, state)
def ShiftRows(state, inverse=False):
state = state[::]
for i in range(4):
state[i*4:i*4+4] = ShiftRow(state[i*4:i*4+4], i, inverse=inverse)
return state
def ShiftRow(row, nr, inverse=False):
for _ in xrange(nr):
if inverse:
row = row[3:4] + row[:3]
else:
row = row[1:4] + row[:1]
return row
def MixColumns(state, inverse=False):
for i in range(4):
state[i:i+16:4] = MixColumn(state[i:i+16:4], inverse=inverse)
return state
from itertools import product
gmulTable = [gmul(a, b) for a, b in product(range(256), repeat=2)]
def gmul(a, b):
return gmulTable[(a<<8)|b]
def MixColumn(column, inverse=False):
if inverse: mult = [14, 9, 13, 11]
else: mult = [2, 1, 1, 3]
cpy = column
column = list(column)
column[0] = gmul(cpy[0], mult[0]) ^ gmul(cpy[3], mult[1]) ^ gmul(cpy[2], mult[2]) ^ gmul(cpy[1], mult[3])
column[1] = gmul(cpy[1], mult[0]) ^ gmul(cpy[0], mult[1]) ^ gmul(cpy[3], mult[2]) ^ gmul(cpy[2], mult[3])
column[2] = gmul(cpy[2], mult[0]) ^ gmul(cpy[1], mult[1]) ^ gmul(cpy[0], mult[2]) ^ gmul(cpy[3], mult[3])
column[3] = gmul(cpy[3], mult[0]) ^ gmul(cpy[2], mult[1]) ^ gmul(cpy[1], mult[2]) ^ gmul(cpy[0], mult[3])
return column
SB = SubBytes
SBi = lambda s: SB(s, inverse=True)
SR = ShiftRows
SRi = lambda s: SR(s, inverse=True)
MC = MixColumns
MCi = lambda s: MC(s, inverse=True)
AK = Aki = AddRoundKey
XOR = AK
ks = None
def encrypt(plain, nr=10):
s = transpose(map(ord, plain))
s = state_encrypt(s, nr=nr)
return "".join(map(chr, transpose(s)))
def decrypt(plain, nr=10):
s = transpose(map(ord, plain))
s = state_decrypt(s, nr=nr)
return "".join(map(chr, transpose(s)))
def state_encrypt(s, nr=None):
nr = nr
for r in xrange(nr):
s = AK(s, ks[r])
s = SB(s)
s = SR(s)
if r < nr-1:
s = MC(s)
s = AK(s, ks[nr])
return s
def state_decrypt(s, nr=None):
nr = nr
s = AK(s, ks[nr])
for r in reversed(range(nr)):
if r < nr - 1:
s = MC(s, inverse=True)
s = SR(s, inverse=True)
s = SB(s, inverse=True)
s = AK(s, ks[r])
return s
def set_key32(k, nr):
global ks
ks = ks_expand(map(ord, k), size=32, expandedKeySize=16*(nr+1))
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment