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iceman1001 2019-04-16 15:19:53 +02:00
commit 87a74e98b8
2 changed files with 7 additions and 20 deletions
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20
tools/nonce2key/crapto1.c
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@ -368,12 +368,6 @@ uint8_t lfsr_rollback_bit(struct Crypto1State *s, uint32_t in, int fb) {
* Rollback the shift register in order to get previous states
*/
uint8_t lfsr_rollback_byte(struct Crypto1State *s, uint32_t in, int fb) {
/*
int i, ret = 0;
for (i = 7; i >= 0; --i)
ret |= lfsr_rollback_bit(s, BIT(in, i), fb) << i;
*/
// unfold loop 20160112
uint8_t ret = 0;
ret |= lfsr_rollback_bit(s, BIT(in, 7), fb) << 7;
ret |= lfsr_rollback_bit(s, BIT(in, 6), fb) << 6;
@ -389,13 +383,7 @@ uint8_t lfsr_rollback_byte(struct Crypto1State *s, uint32_t in, int fb) {
* Rollback the shift register in order to get previous states
*/
uint32_t lfsr_rollback_word(struct Crypto1State *s, uint32_t in, int fb) {
/*
int i;
uint32_t ret = 0;
for (i = 31; i >= 0; --i)
ret |= lfsr_rollback_bit(s, BEBIT(in, i), fb) << (i ^ 24);
*/
// unfold loop 20160112
uint32_t ret = 0;
ret |= lfsr_rollback_bit(s, BEBIT(in, 31), fb) << (31 ^ 24);
ret |= lfsr_rollback_bit(s, BEBIT(in, 30), fb) << (30 ^ 24);
@ -442,7 +430,7 @@ static uint16_t *dist = 0;
int nonce_distance(uint32_t from, uint32_t to) {
uint16_t x, i;
if (!dist) {
dist = malloc(2 << 16);
dist = calloc(2 << 16, sizeof(uint8_t));
if (!dist)
return -1;
for (x = i = 1; i; ++i) {
@ -470,7 +458,7 @@ static uint32_t fastfwd[2][8] = {
* only correct iff [NR_3] ^ NR_3 does not depend on Nr_3
*/
uint32_t *lfsr_prefix_ks(uint8_t ks[8], int isodd) {
uint32_t *candidates = malloc(4 << 10);
uint32_t *candidates = calloc(4 << 10, sizeof(uint8_t));
if (!candidates) return 0;
uint32_t c, entry;
@ -538,7 +526,7 @@ struct Crypto1State *lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8]
odd = lfsr_prefix_ks(ks, 1);
even = lfsr_prefix_ks(ks, 0);
s = statelist = malloc((sizeof * statelist) << 20);
s = statelist = malloc((sizeof * statelist) << 24); // was << 20. Need more for no_par special attack. Enough???
if (!s || !odd || !even) {
free(statelist);
statelist = 0;