#include "rijndaelGladman.h"
#define USE_SWAP_MACROS 1
#if old_way
u1byte pow_tab[256];
u1byte log_tab[256];
u1byte sbx_tab[256];
u1byte isb_tab[256];
u4byte rco_tab[ 10];
u4byte ft_tab[4][256];
u4byte it_tab[4][256];
#ifdef LARGE_TABLES
u4byte fl_tab[4][256];
u4byte il_tab[4][256];
#endif
#else
u1byte *pow_tab;
u1byte *log_tab; ;
u1byte *sbx_tab;
u1byte *isb_tab;
u4byte *rco_tab;
u4byte (*ft_tab)[FT_TAB_SIZE_LS];
u4byte (*it_tab)[IT_TAB_SIZE_LS];
#ifdef LARGE_TABLES
u4byte (*fl_tab)[FL_TAB_SIZE_LS];
u4byte (*il_tab)[IL_TAB_SIZE_LS];
#endif
#endif
#define ff_mult(a,b) (a && b ? pow_tab[(log_tab[a] + log_tab[b]) % 255] : 0)
#define f_rn(bo, bi, n, k) \
bo[n] = ft_tab[0][byte(bi[n],0)] ^ \
ft_tab[1][byte(bi[(n + 1) & 3],1)] ^ \
ft_tab[2][byte(bi[(n + 2) & 3],2)] ^ \
ft_tab[3][byte(bi[(n + 3) & 3],3)] ^ *(k + n)
#define i_rn(bo, bi, n, k) \
bo[n] = it_tab[0][byte(bi[n],0)] ^ \
it_tab[1][byte(bi[(n + 3) & 3],1)] ^ \
it_tab[2][byte(bi[(n + 2) & 3],2)] ^ \
it_tab[3][byte(bi[(n + 1) & 3],3)] ^ *(k + n)
#ifdef LARGE_TABLES
#define ls_box(x) \
( fl_tab[0][byte(x, 0)] ^ \
fl_tab[1][byte(x, 1)] ^ \
fl_tab[2][byte(x, 2)] ^ \
fl_tab[3][byte(x, 3)] )
#define f_rl(bo, bi, n, k) \
bo[n] = fl_tab[0][byte(bi[n],0)] ^ \
fl_tab[1][byte(bi[(n + 1) & 3],1)] ^ \
fl_tab[2][byte(bi[(n + 2) & 3],2)] ^ \
fl_tab[3][byte(bi[(n + 3) & 3],3)] ^ *(k + n)
#define i_rl(bo, bi, n, k) \
bo[n] = il_tab[0][byte(bi[n],0)] ^ \
il_tab[1][byte(bi[(n + 3) & 3],1)] ^ \
il_tab[2][byte(bi[(n + 2) & 3],2)] ^ \
il_tab[3][byte(bi[(n + 1) & 3],3)] ^ *(k + n)
#else
#define ls_box(x) \
((u4byte)sbx_tab[byte(x, 0)] << 0) ^ \
((u4byte)sbx_tab[byte(x, 1)] << 8) ^ \
((u4byte)sbx_tab[byte(x, 2)] << 16) ^ \
((u4byte)sbx_tab[byte(x, 3)] << 24)
#define f_rl(bo, bi, n, k) \
bo[n] = (u4byte)sbx_tab[byte(bi[n],0)] ^ \
rotl(((u4byte)sbx_tab[byte(bi[(n + 1) & 3],1)]), 8) ^ \
rotl(((u4byte)sbx_tab[byte(bi[(n + 2) & 3],2)]), 16) ^ \
rotl(((u4byte)sbx_tab[byte(bi[(n + 3) & 3],3)]), 24) ^ *(k + n)
#define i_rl(bo, bi, n, k) \
bo[n] = (u4byte)isb_tab[byte(bi[n],0)] ^ \
rotl(((u4byte)isb_tab[byte(bi[(n + 3) & 3],1)]), 8) ^ \
rotl(((u4byte)isb_tab[byte(bi[(n + 2) & 3],2)]), 16) ^ \
rotl(((u4byte)isb_tab[byte(bi[(n + 1) & 3],3)]), 24) ^ *(k + n)
#endif
void gen_tabs(void)
{ u4byte i, t;
u1byte p, q;
for(i = 0,p = 1; i < 256; ++i)
{
pow_tab[i] = (u1byte)p; log_tab[p] = (u1byte)i;
p = p ^ (p << 1) ^ (p & 0x80 ? 0x01b : 0);
}
log_tab[1] = 0; p = 1;
for(i = 0; i < 10; ++i)
{
rco_tab[i] = p;
p = (p << 1) ^ (p & 0x80 ? 0x1b : 0);
}
for(i = 0; i < 256; ++i)
{
p = (i ? pow_tab[255 - log_tab[i]] : 0); q = p;
q = (q >> 7) | (q << 1); p ^= q;
q = (q >> 7) | (q << 1); p ^= q;
q = (q >> 7) | (q << 1); p ^= q;
q = (q >> 7) | (q << 1); p ^= q ^ 0x63;
sbx_tab[i] = (u1byte)p; isb_tab[p] = (u1byte)i;
}
for(i = 0; i < 256; ++i)
{
p = sbx_tab[i];
#ifdef LARGE_TABLES
t = p; fl_tab[0][i] = t;
fl_tab[1][i] = rotl(t, 8);
fl_tab[2][i] = rotl(t, 16);
fl_tab[3][i] = rotl(t, 24);
#endif
t = ((u4byte)ff_mult(2, p)) |
((u4byte)p << 8) |
((u4byte)p << 16) |
((u4byte)ff_mult(3, p) << 24);
ft_tab[0][i] = t;
ft_tab[1][i] = rotl(t, 8);
ft_tab[2][i] = rotl(t, 16);
ft_tab[3][i] = rotl(t, 24);
p = isb_tab[i];
#ifdef LARGE_TABLES
t = p; il_tab[0][i] = t;
il_tab[1][i] = rotl(t, 8);
il_tab[2][i] = rotl(t, 16);
il_tab[3][i] = rotl(t, 24);
#endif
t = ((u4byte)ff_mult(14, p)) |
((u4byte)ff_mult( 9, p) << 8) |
((u4byte)ff_mult(13, p) << 16) |
((u4byte)ff_mult(11, p) << 24);
it_tab[0][i] = t;
it_tab[1][i] = rotl(t, 8);
it_tab[2][i] = rotl(t, 16);
it_tab[3][i] = rotl(t, 24);
}
};
#define star_x(x) (((x) & 0x7f7f7f7f) << 1) ^ ((((x) & 0x80808080) >> 7) * 0x1b)
#define imix_col(y,x) \
u = star_x(x); \
v = star_x(u); \
w = star_x(v); \
t = w ^ (x); \
(y) = u ^ v ^ w; \
(y) ^= rotr(u ^ t, 8) ^ \
rotr(v ^ t, 16) ^ \
rotr(t,24)
#define loop4(i) \
{ t = ls_box(rotr(t, 8)) ^ rco_tab[i]; \
t ^= e_key[4 * i]; e_key[4 * i + 4] = t; \
t ^= e_key[4 * i + 1]; e_key[4 * i + 5] = t; \
t ^= e_key[4 * i + 2]; e_key[4 * i + 6] = t; \
t ^= e_key[4 * i + 3]; e_key[4 * i + 7] = t; \
}
#define loop6(i) \
{ t = ls_box(rotr(t, 8)) ^ rco_tab[i]; \
t ^= e_key[6 * i]; e_key[6 * i + 6] = t; \
t ^= e_key[6 * i + 1]; e_key[6 * i + 7] = t; \
t ^= e_key[6 * i + 2]; e_key[6 * i + 8] = t; \
t ^= e_key[6 * i + 3]; e_key[6 * i + 9] = t; \
t ^= e_key[6 * i + 4]; e_key[6 * i + 10] = t; \
t ^= e_key[6 * i + 5]; e_key[6 * i + 11] = t; \
}
#define loop8(i) \
{ t = ls_box(rotr(t, 8)) ^ rco_tab[i]; \
t ^= e_key[8 * i]; e_key[8 * i + 8] = t; \
t ^= e_key[8 * i + 1]; e_key[8 * i + 9] = t; \
t ^= e_key[8 * i + 2]; e_key[8 * i + 10] = t; \
t ^= e_key[8 * i + 3]; e_key[8 * i + 11] = t; \
t = e_key[8 * i + 4] ^ ls_box(t); \
e_key[8 * i + 12] = t; \
t ^= e_key[8 * i + 5]; e_key[8 * i + 13] = t; \
t ^= e_key[8 * i + 6]; e_key[8 * i + 14] = t; \
t ^= e_key[8 * i + 7]; e_key[8 * i + 15] = t; \
}
u4byte *set_key(
const u4byte in_key[],
const u4byte key_len,
GAesKey *aesKey)
{ u4byte i, t, u, v, w;
u4byte *e_key = aesKey->e_key;
u4byte *d_key = aesKey->d_key;
aesKey->k_len = (key_len + 31) / 32;
#if USE_SWAP_MACROS
get_key(e_key, key_len);
#else
e_key[0] = in_key[0]; e_key[1] = in_key[1];
e_key[2] = in_key[2]; e_key[3] = in_key[3];
#endif
switch(aesKey->k_len)
{
case 4: t = e_key[3];
for(i = 0; i < 10; ++i)
loop4(i);
break;
case 6:
#if USE_SWAP_MACROS
t = e_key[5];
#else
e_key[4] = in_key[4]; t = e_key[5] = in_key[5];
#endif
for(i = 0; i < 8; ++i)
loop6(i);
break;
case 8:
#if USE_SWAP_MACROS
t = e_key[7];
#else
e_key[4] = in_key[4]; e_key[5] = in_key[5];
e_key[6] = in_key[6]; t = e_key[7] = in_key[7];
#endif
for(i = 0; i < 7; ++i)
loop8(i);
break;
}
d_key[0] = e_key[0]; d_key[1] = e_key[1];
d_key[2] = e_key[2]; d_key[3] = e_key[3];
for(i = 4; i < 4 * aesKey->k_len + 24; ++i)
{
imix_col(d_key[i], e_key[i]);
}
return e_key;
};
#define f_nround(bo, bi, k) \
f_rn(bo, bi, 0, k); \
f_rn(bo, bi, 1, k); \
f_rn(bo, bi, 2, k); \
f_rn(bo, bi, 3, k); \
k += 4
#define f_lround(bo, bi, k) \
f_rl(bo, bi, 0, k); \
f_rl(bo, bi, 1, k); \
f_rl(bo, bi, 2, k); \
f_rl(bo, bi, 3, k)
void rEncrypt(
const u4byte in_blk[4],
u4byte out_blk[4],
const GAesKey *aesKey)
{
u4byte b0[4], b1[4], *kp;
u4byte *e_key = aesKey->e_key;
#if USE_SWAP_MACROS
u4byte swap_block[4];
get_block(swap_block);
b0[0] = swap_block[0] ^ e_key[0]; b0[1] = swap_block[1] ^ e_key[1];
b0[2] = swap_block[2] ^ e_key[2]; b0[3] = swap_block[3] ^ e_key[3];
#else
b0[0] = in_blk[0] ^ e_key[0]; b0[1] = in_blk[1] ^ e_key[1];
b0[2] = in_blk[2] ^ e_key[2]; b0[3] = in_blk[3] ^ e_key[3];
#endif
kp = e_key + 4;
if(aesKey->k_len > 6)
{
f_nround(b1, b0, kp); f_nround(b0, b1, kp);
}
if(aesKey->k_len > 4)
{
f_nround(b1, b0, kp); f_nround(b0, b1, kp);
}
f_nround(b1, b0, kp); f_nround(b0, b1, kp);
f_nround(b1, b0, kp); f_nround(b0, b1, kp);
f_nround(b1, b0, kp); f_nround(b0, b1, kp);
f_nround(b1, b0, kp); f_nround(b0, b1, kp);
f_nround(b1, b0, kp); f_lround(b0, b1, kp);
#if USE_SWAP_MACROS
put_block(b0);
#else
out_blk[0] = b0[0]; out_blk[1] = b0[1];
out_blk[2] = b0[2]; out_blk[3] = b0[3];
#endif
};
#define i_nround(bo, bi, k) \
i_rn(bo, bi, 0, k); \
i_rn(bo, bi, 1, k); \
i_rn(bo, bi, 2, k); \
i_rn(bo, bi, 3, k); \
k -= 4
#define i_lround(bo, bi, k) \
i_rl(bo, bi, 0, k); \
i_rl(bo, bi, 1, k); \
i_rl(bo, bi, 2, k); \
i_rl(bo, bi, 3, k)
void rDecrypt(
const u4byte in_blk[4],
u4byte out_blk[4],
const GAesKey *aesKey)
{
u4byte b0[4], b1[4], *kp;
u4byte *e_key = aesKey->e_key;
u4byte *d_key = aesKey->d_key;
u4byte k_len = aesKey->k_len;
#if USE_SWAP_MACROS
u4byte swap_block[4];
get_block(swap_block);
b0[0] = swap_block[0] ^ e_key[4 * k_len + 24];
b0[1] = swap_block[1] ^ e_key[4 * k_len + 25];
b0[2] = swap_block[2] ^ e_key[4 * k_len + 26];
b0[3] = swap_block[3] ^ e_key[4 * k_len + 27];
#else
b0[0] = in_blk[0] ^ e_key[4 * k_len + 24];
b0[1] = in_blk[1] ^ e_key[4 * k_len + 25];
b0[2] = in_blk[2] ^ e_key[4 * k_len + 26];
b0[3] = in_blk[3] ^ e_key[4 * k_len + 27];
#endif
kp = d_key + 4 * (k_len + 5);
if(k_len > 6)
{
i_nround(b1, b0, kp); i_nround(b0, b1, kp);
}
if(k_len > 4)
{
i_nround(b1, b0, kp); i_nround(b0, b1, kp);
}
i_nround(b1, b0, kp); i_nround(b0, b1, kp);
i_nround(b1, b0, kp); i_nround(b0, b1, kp);
i_nround(b1, b0, kp); i_nround(b0, b1, kp);
i_nround(b1, b0, kp); i_nround(b0, b1, kp);
i_nround(b1, b0, kp); i_lround(b0, b1, kp);
#if USE_SWAP_MACROS
put_block(b0);
#else
out_blk[0] = b0[0]; out_blk[1] = b0[1];
out_blk[2] = b0[2]; out_blk[3] = b0[3];
#endif
};