0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91
};
-static uint8_t log8[256];
-static uint8_t alog8[512];
static uint8_t sbox[256];
static uint8_t inv_sbox[256];
+#ifdef CONFIG_SMALL
+static uint32_t enc_multbl[1][256];
+static uint32_t dec_multbl[1][256];
+#else
+static uint32_t enc_multbl[4][256];
+static uint32_t dec_multbl[4][256];
+#endif
static inline void addkey(uint64_t state[2], uint64_t round_key[2]){
state[0] ^= round_key[0];
#define SUBSHIFT2(s, box) t=s[0]; s[0]=box[s[ 8]]; s[ 8]=box[ t]; t=s[ 4]; s[ 4]=box[s[12]]; s[12]=box[t];
#define SUBSHIFT3(s, box) t=s[0]; s[0]=box[s[12]]; s[12]=box[s[ 8]]; s[ 8]=box[s[ 4]]; s[ 4]=box[t];
-static inline int mul(int a, int b){
+static inline int mul(int a, int b, uint8_t alog8[256]){
if(a==255) return 0;
else return alog8[a+b];
}
-static inline void mix(uint8_t state[4][4], int c0, int c1, int c2, int c3){
- uint8_t tmp[4][4];
- int i, j;
-
- for(i=0; i<16; i++)
- tmp[0][i]= log8[ state[0][i] ];
- for(j=0; j<4; j++)
- for(i=0; i<4; i++)
- state[j][i]= mul( tmp[j][ i ], c0 )
- ^mul( tmp[j][(i+ 1)&3], c1 )
- ^mul( tmp[j][(i+ 2)&3], c2 )
- ^mul( tmp[j][(i+ 3)&3], c3 );
+#define ROT(x,s) ((x>>s)|(x<<(32-s))
+
+static inline void mix(uint8_t state[4][4], uint32_t multbl[4][256]){
+ int i;
+ for(i=0; i<4; i++)
+#ifdef CONFIG_SMALL
+ ((uint32_t *)(state))[i] = multbl[0][state[i][0]] ^ ROT(multbl[0][state[i][1]], 8)
+ ^ROT(multbl[0][state[i][2]],16) ^ ROT(multbl[0][state[i][3]],24);
+
+#else
+ ((uint32_t *)(state))[i] = multbl[0][state[i][0]] ^ multbl[1][state[i][1]]
+ ^multbl[2][state[i][2]] ^ multbl[3][state[i][3]];
+#endif
}
if(r==a->rounds-1)
addkey(a->state, a->round_key[r+1]);
else
- mix(a->state, log8[0xe], log8[0xb], log8[0xd], log8[9]); //FIXME replace log8 by const
+ mix(a->state, dec_multbl);
SUBSHIFT0((a->state[0]+0), inv_sbox)
SUBSHIFT3((a->state[0]+1), inv_sbox)
SUBSHIFT2((a->state[0]+2), inv_sbox)
if(r==a->rounds-1)
addkey(a->state, a->round_key[r+1]);
else
- mix(a->state, log8[2], log8[3], 0, 0); //FIXME replace log8 by const / optimze mix as this can be simplified alot
+ mix(a->state, enc_multbl); //FIXME replace log8 by const / optimze mix as this can be simplified alot
}
}
uint8_t tk[8][4];
int KC= key_bits/32;
int rounds= KC + 6;
+ uint8_t log8[256];
+ uint8_t alog8[512];
if(!sbox[255]){
j=1;
inv_sbox[j]= i;
sbox [i]= j;
// av_log(NULL, AV_LOG_ERROR, "%d, ", log8[i]);
+ //FIXME multbl init
}
}