*/
static struct Crypto1State*
check_pfx_parity(uint32_t prefix, uint32_t rresp, uint8_t parities[8][8],
- uint32_t odd, uint32_t even, struct Crypto1State* sl)
+ uint32_t odd, uint32_t even, struct Crypto1State* sl, uint32_t no_par)
{
- uint32_t ks1, nr, ks2, rr, ks3, c, good = 1, no_par = 1;
-
- for (int i = 0; i < 8; i++) {
- for (int j = 0; j < 8; j++) {
- if (parities[i][j] != 0) {
- no_par = 0;
- break;
- }
- }
- }
+ uint32_t ks1, nr, ks2, rr, ks3, c, good = 1;
for(c = 0; good && c < 8; ++c) {
sl->odd = odd ^ fastfwd[1][c];
* Implentation of the common prefix attack.
*/
struct Crypto1State*
-lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8])
+lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8], uint32_t no_par)
{
struct Crypto1State *statelist, *s;
uint32_t *odd, *even, *o, *e, top;
odd = lfsr_prefix_ks(ks, 1);
even = lfsr_prefix_ks(ks, 0);
- s = statelist = malloc((sizeof *statelist) << 20);
+ s = statelist = malloc((sizeof *statelist) << 22); // was << 20. Need more for no_par special attack. Enough???
if(!s || !odd || !even) {
free(statelist);
statelist = 0;
for(top = 0; top < 64; ++top) {
*o += 1 << 21;
*e += (!(top & 7) + 1) << 21;
- s = check_pfx_parity(pfx, rr, par, *o, *e, s);
+ s = check_pfx_parity(pfx, rr, par, *o, *e, s, no_par);
}
s->odd = s->even = 0;