/* | |
--------------------------------------------------------------------------- | |
Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. All rights reserved. | |
LICENSE TERMS | |
The free distribution and use of this software in both source and binary | |
form is allowed (with or without changes) provided that: | |
1. distributions of this source code include the above copyright | |
notice, this list of conditions and the following disclaimer; | |
2. distributions in binary form include the above copyright | |
notice, this list of conditions and the following disclaimer | |
in the documentation and/or other associated materials; | |
3. the copyright holder's name is not used to endorse products | |
built using this software without specific written permission. | |
ALTERNATIVELY, provided that this notice is retained in full, this product | |
may be distributed under the terms of the GNU General Public License (GPL), | |
in which case the provisions of the GPL apply INSTEAD OF those given above. | |
DISCLAIMER | |
This software is provided 'as is' with no explicit or implied warranties | |
in respect of its properties, including, but not limited to, correctness | |
and/or fitness for purpose. | |
--------------------------------------------------------------------------- | |
Issue 28/01/2004 | |
*/ | |
#if defined(__cplusplus) | |
extern "C" | |
{ | |
#endif | |
#define DO_TABLES | |
#include "aesopt.h" | |
#if defined(FIXED_TABLES) | |
#define sb_data(w) {\ | |
w(0x63), w(0x7c), w(0x77), w(0x7b), w(0xf2), w(0x6b), w(0x6f), w(0xc5),\ | |
w(0x30), w(0x01), w(0x67), w(0x2b), w(0xfe), w(0xd7), w(0xab), w(0x76),\ | |
w(0xca), w(0x82), w(0xc9), w(0x7d), w(0xfa), w(0x59), w(0x47), w(0xf0),\ | |
w(0xad), w(0xd4), w(0xa2), w(0xaf), w(0x9c), w(0xa4), w(0x72), w(0xc0),\ | |
w(0xb7), w(0xfd), w(0x93), w(0x26), w(0x36), w(0x3f), w(0xf7), w(0xcc),\ | |
w(0x34), w(0xa5), w(0xe5), w(0xf1), w(0x71), w(0xd8), w(0x31), w(0x15),\ | |
w(0x04), w(0xc7), w(0x23), w(0xc3), w(0x18), w(0x96), w(0x05), w(0x9a),\ | |
w(0x07), w(0x12), w(0x80), w(0xe2), w(0xeb), w(0x27), w(0xb2), w(0x75),\ | |
w(0x09), w(0x83), w(0x2c), w(0x1a), w(0x1b), w(0x6e), w(0x5a), w(0xa0),\ | |
w(0x52), w(0x3b), w(0xd6), w(0xb3), w(0x29), w(0xe3), w(0x2f), w(0x84),\ | |
w(0x53), w(0xd1), w(0x00), w(0xed), w(0x20), w(0xfc), w(0xb1), w(0x5b),\ | |
w(0x6a), w(0xcb), w(0xbe), w(0x39), w(0x4a), w(0x4c), w(0x58), w(0xcf),\ | |
w(0xd0), w(0xef), w(0xaa), w(0xfb), w(0x43), w(0x4d), w(0x33), w(0x85),\ | |
w(0x45), w(0xf9), w(0x02), w(0x7f), w(0x50), w(0x3c), w(0x9f), w(0xa8),\ | |
w(0x51), w(0xa3), w(0x40), w(0x8f), w(0x92), w(0x9d), w(0x38), w(0xf5),\ | |
w(0xbc), w(0xb6), w(0xda), w(0x21), w(0x10), w(0xff), w(0xf3), w(0xd2),\ | |
w(0xcd), w(0x0c), w(0x13), w(0xec), w(0x5f), w(0x97), w(0x44), w(0x17),\ | |
w(0xc4), w(0xa7), w(0x7e), w(0x3d), w(0x64), w(0x5d), w(0x19), w(0x73),\ | |
w(0x60), w(0x81), w(0x4f), w(0xdc), w(0x22), w(0x2a), w(0x90), w(0x88),\ | |
w(0x46), w(0xee), w(0xb8), w(0x14), w(0xde), w(0x5e), w(0x0b), w(0xdb),\ | |
w(0xe0), w(0x32), w(0x3a), w(0x0a), w(0x49), w(0x06), w(0x24), w(0x5c),\ | |
w(0xc2), w(0xd3), w(0xac), w(0x62), w(0x91), w(0x95), w(0xe4), w(0x79),\ | |
w(0xe7), w(0xc8), w(0x37), w(0x6d), w(0x8d), w(0xd5), w(0x4e), w(0xa9),\ | |
w(0x6c), w(0x56), w(0xf4), w(0xea), w(0x65), w(0x7a), w(0xae), w(0x08),\ | |
w(0xba), w(0x78), w(0x25), w(0x2e), w(0x1c), w(0xa6), w(0xb4), w(0xc6),\ | |
w(0xe8), w(0xdd), w(0x74), w(0x1f), w(0x4b), w(0xbd), w(0x8b), w(0x8a),\ | |
w(0x70), w(0x3e), w(0xb5), w(0x66), w(0x48), w(0x03), w(0xf6), w(0x0e),\ | |
w(0x61), w(0x35), w(0x57), w(0xb9), w(0x86), w(0xc1), w(0x1d), w(0x9e),\ | |
w(0xe1), w(0xf8), w(0x98), w(0x11), w(0x69), w(0xd9), w(0x8e), w(0x94),\ | |
w(0x9b), w(0x1e), w(0x87), w(0xe9), w(0xce), w(0x55), w(0x28), w(0xdf),\ | |
w(0x8c), w(0xa1), w(0x89), w(0x0d), w(0xbf), w(0xe6), w(0x42), w(0x68),\ | |
w(0x41), w(0x99), w(0x2d), w(0x0f), w(0xb0), w(0x54), w(0xbb), w(0x16) } | |
#define isb_data(w) {\ | |
w(0x52), w(0x09), w(0x6a), w(0xd5), w(0x30), w(0x36), w(0xa5), w(0x38),\ | |
w(0xbf), w(0x40), w(0xa3), w(0x9e), w(0x81), w(0xf3), w(0xd7), w(0xfb),\ | |
w(0x7c), w(0xe3), w(0x39), w(0x82), w(0x9b), w(0x2f), w(0xff), w(0x87),\ | |
w(0x34), w(0x8e), w(0x43), w(0x44), w(0xc4), w(0xde), w(0xe9), w(0xcb),\ | |
w(0x54), w(0x7b), w(0x94), w(0x32), w(0xa6), w(0xc2), w(0x23), w(0x3d),\ | |
w(0xee), w(0x4c), w(0x95), w(0x0b), w(0x42), w(0xfa), w(0xc3), w(0x4e),\ | |
w(0x08), w(0x2e), w(0xa1), w(0x66), w(0x28), w(0xd9), w(0x24), w(0xb2),\ | |
w(0x76), w(0x5b), w(0xa2), w(0x49), w(0x6d), w(0x8b), w(0xd1), w(0x25),\ | |
w(0x72), w(0xf8), w(0xf6), w(0x64), w(0x86), w(0x68), w(0x98), w(0x16),\ | |
w(0xd4), w(0xa4), w(0x5c), w(0xcc), w(0x5d), w(0x65), w(0xb6), w(0x92),\ | |
w(0x6c), w(0x70), w(0x48), w(0x50), w(0xfd), w(0xed), w(0xb9), w(0xda),\ | |
w(0x5e), w(0x15), w(0x46), w(0x57), w(0xa7), w(0x8d), w(0x9d), w(0x84),\ | |
w(0x90), w(0xd8), w(0xab), w(0x00), w(0x8c), w(0xbc), w(0xd3), w(0x0a),\ | |
w(0xf7), w(0xe4), w(0x58), w(0x05), w(0xb8), w(0xb3), w(0x45), w(0x06),\ | |
w(0xd0), w(0x2c), w(0x1e), w(0x8f), w(0xca), w(0x3f), w(0x0f), w(0x02),\ | |
w(0xc1), w(0xaf), w(0xbd), w(0x03), w(0x01), w(0x13), w(0x8a), w(0x6b),\ | |
w(0x3a), w(0x91), w(0x11), w(0x41), w(0x4f), w(0x67), w(0xdc), w(0xea),\ | |
w(0x97), w(0xf2), w(0xcf), w(0xce), w(0xf0), w(0xb4), w(0xe6), w(0x73),\ | |
w(0x96), w(0xac), w(0x74), w(0x22), w(0xe7), w(0xad), w(0x35), w(0x85),\ | |
w(0xe2), w(0xf9), w(0x37), w(0xe8), w(0x1c), w(0x75), w(0xdf), w(0x6e),\ | |
w(0x47), w(0xf1), w(0x1a), w(0x71), w(0x1d), w(0x29), w(0xc5), w(0x89),\ | |
w(0x6f), w(0xb7), w(0x62), w(0x0e), w(0xaa), w(0x18), w(0xbe), w(0x1b),\ | |
w(0xfc), w(0x56), w(0x3e), w(0x4b), w(0xc6), w(0xd2), w(0x79), w(0x20),\ | |
w(0x9a), w(0xdb), w(0xc0), w(0xfe), w(0x78), w(0xcd), w(0x5a), w(0xf4),\ | |
w(0x1f), w(0xdd), w(0xa8), w(0x33), w(0x88), w(0x07), w(0xc7), w(0x31),\ | |
w(0xb1), w(0x12), w(0x10), w(0x59), w(0x27), w(0x80), w(0xec), w(0x5f),\ | |
w(0x60), w(0x51), w(0x7f), w(0xa9), w(0x19), w(0xb5), w(0x4a), w(0x0d),\ | |
w(0x2d), w(0xe5), w(0x7a), w(0x9f), w(0x93), w(0xc9), w(0x9c), w(0xef),\ | |
w(0xa0), w(0xe0), w(0x3b), w(0x4d), w(0xae), w(0x2a), w(0xf5), w(0xb0),\ | |
w(0xc8), w(0xeb), w(0xbb), w(0x3c), w(0x83), w(0x53), w(0x99), w(0x61),\ | |
w(0x17), w(0x2b), w(0x04), w(0x7e), w(0xba), w(0x77), w(0xd6), w(0x26),\ | |
w(0xe1), w(0x69), w(0x14), w(0x63), w(0x55), w(0x21), w(0x0c), w(0x7d) } | |
#define mm_data(w) {\ | |
w(0x00), w(0x01), w(0x02), w(0x03), w(0x04), w(0x05), w(0x06), w(0x07),\ | |
w(0x08), w(0x09), w(0x0a), w(0x0b), w(0x0c), w(0x0d), w(0x0e), w(0x0f),\ | |
w(0x10), w(0x11), w(0x12), w(0x13), w(0x14), w(0x15), w(0x16), w(0x17),\ | |
w(0x18), w(0x19), w(0x1a), w(0x1b), w(0x1c), w(0x1d), w(0x1e), w(0x1f),\ | |
w(0x20), w(0x21), w(0x22), w(0x23), w(0x24), w(0x25), w(0x26), w(0x27),\ | |
w(0x28), w(0x29), w(0x2a), w(0x2b), w(0x2c), w(0x2d), w(0x2e), w(0x2f),\ | |
w(0x30), w(0x31), w(0x32), w(0x33), w(0x34), w(0x35), w(0x36), w(0x37),\ | |
w(0x38), w(0x39), w(0x3a), w(0x3b), w(0x3c), w(0x3d), w(0x3e), w(0x3f),\ | |
w(0x40), w(0x41), w(0x42), w(0x43), w(0x44), w(0x45), w(0x46), w(0x47),\ | |
w(0x48), w(0x49), w(0x4a), w(0x4b), w(0x4c), w(0x4d), w(0x4e), w(0x4f),\ | |
w(0x50), w(0x51), w(0x52), w(0x53), w(0x54), w(0x55), w(0x56), w(0x57),\ | |
w(0x58), w(0x59), w(0x5a), w(0x5b), w(0x5c), w(0x5d), w(0x5e), w(0x5f),\ | |
w(0x60), w(0x61), w(0x62), w(0x63), w(0x64), w(0x65), w(0x66), w(0x67),\ | |
w(0x68), w(0x69), w(0x6a), w(0x6b), w(0x6c), w(0x6d), w(0x6e), w(0x6f),\ | |
w(0x70), w(0x71), w(0x72), w(0x73), w(0x74), w(0x75), w(0x76), w(0x77),\ | |
w(0x78), w(0x79), w(0x7a), w(0x7b), w(0x7c), w(0x7d), w(0x7e), w(0x7f),\ | |
w(0x80), w(0x81), w(0x82), w(0x83), w(0x84), w(0x85), w(0x86), w(0x87),\ | |
w(0x88), w(0x89), w(0x8a), w(0x8b), w(0x8c), w(0x8d), w(0x8e), w(0x8f),\ | |
w(0x90), w(0x91), w(0x92), w(0x93), w(0x94), w(0x95), w(0x96), w(0x97),\ | |
w(0x98), w(0x99), w(0x9a), w(0x9b), w(0x9c), w(0x9d), w(0x9e), w(0x9f),\ | |
w(0xa0), w(0xa1), w(0xa2), w(0xa3), w(0xa4), w(0xa5), w(0xa6), w(0xa7),\ | |
w(0xa8), w(0xa9), w(0xaa), w(0xab), w(0xac), w(0xad), w(0xae), w(0xaf),\ | |
w(0xb0), w(0xb1), w(0xb2), w(0xb3), w(0xb4), w(0xb5), w(0xb6), w(0xb7),\ | |
w(0xb8), w(0xb9), w(0xba), w(0xbb), w(0xbc), w(0xbd), w(0xbe), w(0xbf),\ | |
w(0xc0), w(0xc1), w(0xc2), w(0xc3), w(0xc4), w(0xc5), w(0xc6), w(0xc7),\ | |
w(0xc8), w(0xc9), w(0xca), w(0xcb), w(0xcc), w(0xcd), w(0xce), w(0xcf),\ | |
w(0xd0), w(0xd1), w(0xd2), w(0xd3), w(0xd4), w(0xd5), w(0xd6), w(0xd7),\ | |
w(0xd8), w(0xd9), w(0xda), w(0xdb), w(0xdc), w(0xdd), w(0xde), w(0xdf),\ | |
w(0xe0), w(0xe1), w(0xe2), w(0xe3), w(0xe4), w(0xe5), w(0xe6), w(0xe7),\ | |
w(0xe8), w(0xe9), w(0xea), w(0xeb), w(0xec), w(0xed), w(0xee), w(0xef),\ | |
w(0xf0), w(0xf1), w(0xf2), w(0xf3), w(0xf4), w(0xf5), w(0xf6), w(0xf7),\ | |
w(0xf8), w(0xf9), w(0xfa), w(0xfb), w(0xfc), w(0xfd), w(0xfe), w(0xff) } | |
#define rc_data(w) {\ | |
w(0x01), w(0x02), w(0x04), w(0x08), w(0x10),w(0x20), w(0x40), w(0x80),\ | |
w(0x1b), w(0x36) } | |
#define h0(x) (x) | |
#define w0(p) bytes2word(p, 0, 0, 0) | |
#define w1(p) bytes2word(0, p, 0, 0) | |
#define w2(p) bytes2word(0, 0, p, 0) | |
#define w3(p) bytes2word(0, 0, 0, p) | |
#define u0(p) bytes2word(f2(p), p, p, f3(p)) | |
#define u1(p) bytes2word(f3(p), f2(p), p, p) | |
#define u2(p) bytes2word(p, f3(p), f2(p), p) | |
#define u3(p) bytes2word(p, p, f3(p), f2(p)) | |
#define v0(p) bytes2word(fe(p), f9(p), fd(p), fb(p)) | |
#define v1(p) bytes2word(fb(p), fe(p), f9(p), fd(p)) | |
#define v2(p) bytes2word(fd(p), fb(p), fe(p), f9(p)) | |
#define v3(p) bytes2word(f9(p), fd(p), fb(p), fe(p)) | |
#endif | |
#if defined(FIXED_TABLES) || !defined(FF_TABLES) | |
#define f2(x) ((x<<1) ^ (((x>>7) & 1) * WPOLY)) | |
#define f4(x) ((x<<2) ^ (((x>>6) & 1) * WPOLY) ^ (((x>>6) & 2) * WPOLY)) | |
#define f8(x) ((x<<3) ^ (((x>>5) & 1) * WPOLY) ^ (((x>>5) & 2) * WPOLY) \ | |
^ (((x>>5) & 4) * WPOLY)) | |
#define f3(x) (f2(x) ^ x) | |
#define f9(x) (f8(x) ^ x) | |
#define fb(x) (f8(x) ^ f2(x) ^ x) | |
#define fd(x) (f8(x) ^ f4(x) ^ x) | |
#define fe(x) (f8(x) ^ f4(x) ^ f2(x)) | |
#else | |
#define f2(x) ((x) ? pow[log[x] + 0x19] : 0) | |
#define f3(x) ((x) ? pow[log[x] + 0x01] : 0) | |
#define f9(x) ((x) ? pow[log[x] + 0xc7] : 0) | |
#define fb(x) ((x) ? pow[log[x] + 0x68] : 0) | |
#define fd(x) ((x) ? pow[log[x] + 0xee] : 0) | |
#define fe(x) ((x) ? pow[log[x] + 0xdf] : 0) | |
#define fi(x) ((x) ? pow[ 255 - log[x]] : 0) | |
#endif | |
#include "aestab.h" | |
#if defined(FIXED_TABLES) | |
/* implemented in case of wrong call for fixed tables */ | |
void gen_tabs(void) | |
{ | |
} | |
#else /* dynamic table generation */ | |
#if !defined(FF_TABLES) | |
/* Generate the tables for the dynamic table option | |
It will generally be sensible to use tables to compute finite | |
field multiplies and inverses but where memory is scarse this | |
code might sometimes be better. But it only has effect during | |
initialisation so its pretty unimportant in overall terms. | |
*/ | |
/* return 2 ^ (n - 1) where n is the bit number of the highest bit | |
set in x with x in the range 1 < x < 0x00000200. This form is | |
used so that locals within fi can be bytes rather than words | |
*/ | |
static aes_08t hibit(const aes_32t x) | |
{ aes_08t r = (aes_08t)((x >> 1) | (x >> 2)); | |
r |= (r >> 2); | |
r |= (r >> 4); | |
return (r + 1) >> 1; | |
} | |
/* return the inverse of the finite field element x */ | |
static aes_08t fi(const aes_08t x) | |
{ aes_08t p1 = x, p2 = BPOLY, n1 = hibit(x), n2 = 0x80, v1 = 1, v2 = 0; | |
if(x < 2) return x; | |
for(;;) | |
{ | |
if(!n1) return v1; | |
while(n2 >= n1) | |
{ | |
n2 /= n1; p2 ^= p1 * n2; v2 ^= v1 * n2; n2 = hibit(p2); | |
} | |
if(!n2) return v2; | |
while(n1 >= n2) | |
{ | |
n1 /= n2; p1 ^= p2 * n1; v1 ^= v2 * n1; n1 = hibit(p1); | |
} | |
} | |
} | |
#endif | |
/* The forward and inverse affine transformations used in the S-box */ | |
#define fwd_affine(x) \ | |
(w = (aes_32t)x, w ^= (w<<1)^(w<<2)^(w<<3)^(w<<4), 0x63^(aes_08t)(w^(w>>8))) | |
#define inv_affine(x) \ | |
(w = (aes_32t)x, w = (w<<1)^(w<<3)^(w<<6), 0x05^(aes_08t)(w^(w>>8))) | |
static int init = 0; | |
void gen_tabs(void) | |
{ aes_32t i, w; | |
#if defined(FF_TABLES) | |
aes_08t pow[512], log[256]; | |
if(init) return; | |
/* log and power tables for GF(2^8) finite field with | |
WPOLY as modular polynomial - the simplest primitive | |
root is 0x03, used here to generate the tables | |
*/ | |
i = 0; w = 1; | |
do | |
{ | |
pow[i] = (aes_08t)w; | |
pow[i + 255] = (aes_08t)w; | |
log[w] = (aes_08t)i++; | |
w ^= (w << 1) ^ (w & 0x80 ? WPOLY : 0); | |
} | |
while (w != 1); | |
#else | |
if(init) return; | |
#endif | |
for(i = 0, w = 1; i < RC_LENGTH; ++i) | |
{ | |
t_set(r,c)[i] = bytes2word(w, 0, 0, 0); | |
w = f2(w); | |
} | |
for(i = 0; i < 256; ++i) | |
{ aes_08t b; | |
b = fwd_affine(fi((aes_08t)i)); | |
w = bytes2word(f2(b), b, b, f3(b)); | |
#if defined( SBX_SET ) | |
t_set(s,box)[i] = b; | |
#endif | |
#if defined( FT1_SET ) /* tables for a normal encryption round */ | |
t_set(f,n)[i] = w; | |
#endif | |
#if defined( FT4_SET ) | |
t_set(f,n)[0][i] = w; | |
t_set(f,n)[1][i] = upr(w,1); | |
t_set(f,n)[2][i] = upr(w,2); | |
t_set(f,n)[3][i] = upr(w,3); | |
#endif | |
w = bytes2word(b, 0, 0, 0); | |
#if defined( FL1_SET ) /* tables for last encryption round (may also */ | |
t_set(f,l)[i] = w; /* be used in the key schedule) */ | |
#endif | |
#if defined( FL4_SET ) | |
t_set(f,l)[0][i] = w; | |
t_set(f,l)[1][i] = upr(w,1); | |
t_set(f,l)[2][i] = upr(w,2); | |
t_set(f,l)[3][i] = upr(w,3); | |
#endif | |
#if defined( LS1_SET ) /* table for key schedule if t_set(f,l) above is */ | |
t_set(l,s)[i] = w; /* not of the required form */ | |
#endif | |
#if defined( LS4_SET ) | |
t_set(l,s)[0][i] = w; | |
t_set(l,s)[1][i] = upr(w,1); | |
t_set(l,s)[2][i] = upr(w,2); | |
t_set(l,s)[3][i] = upr(w,3); | |
#endif | |
b = fi(inv_affine((aes_08t)i)); | |
w = bytes2word(fe(b), f9(b), fd(b), fb(b)); | |
#if defined( IM1_SET ) /* tables for the inverse mix column operation */ | |
t_set(i,m)[b] = w; | |
#endif | |
#if defined( IM4_SET ) | |
t_set(i,m)[0][b] = w; | |
t_set(i,m)[1][b] = upr(w,1); | |
t_set(i,m)[2][b] = upr(w,2); | |
t_set(i,m)[3][b] = upr(w,3); | |
#endif | |
#if defined( ISB_SET ) | |
t_set(i,box)[i] = b; | |
#endif | |
#if defined( IT1_SET ) /* tables for a normal decryption round */ | |
t_set(i,n)[i] = w; | |
#endif | |
#if defined( IT4_SET ) | |
t_set(i,n)[0][i] = w; | |
t_set(i,n)[1][i] = upr(w,1); | |
t_set(i,n)[2][i] = upr(w,2); | |
t_set(i,n)[3][i] = upr(w,3); | |
#endif | |
w = bytes2word(b, 0, 0, 0); | |
#if defined( IL1_SET ) /* tables for last decryption round */ | |
t_set(i,l)[i] = w; | |
#endif | |
#if defined( IL4_SET ) | |
t_set(i,l)[0][i] = w; | |
t_set(i,l)[1][i] = upr(w,1); | |
t_set(i,l)[2][i] = upr(w,2); | |
t_set(i,l)[3][i] = upr(w,3); | |
#endif | |
} | |
init = 1; | |
} | |
#endif | |
#if defined(__cplusplus) | |
} | |
#endif | |