X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/66afab80bdc78f26fecaa90f27fb2885dc3e9ef8..87a513aa1d0f6eccd85b46d06cd13499d048f8c9:/client/nonce2key/crapto1.c diff --git a/client/nonce2key/crapto1.c b/client/nonce2key/crapto1.c index 59d6a8d6..9f6f7f6b 100644 --- a/client/nonce2key/crapto1.c +++ b/client/nonce2key/crapto1.c @@ -26,95 +26,15 @@ static void __attribute__((constructor)) fill_lut() { uint32_t i; for(i = 0; i < 1 << 20; ++i) - filterlut[i] = filter(i); + filterlut[i] = filter(i); } #define filter(x) (filterlut[(x) & 0xfffff]) #endif - - -typedef struct bucket { - uint32_t *head; - uint32_t *bp; -} bucket_t; - -typedef bucket_t bucket_array_t[2][0x100]; - -typedef struct bucket_info { - struct { - uint32_t *head, *tail; - } bucket_info[2][0x100]; - uint32_t numbuckets; - } bucket_info_t; - - -static void bucket_sort_intersect(uint32_t* const estart, uint32_t* const estop, - uint32_t* const ostart, uint32_t* const ostop, - bucket_info_t *bucket_info, bucket_array_t bucket) -{ - uint32_t *p1, *p2; - uint32_t *start[2]; - uint32_t *stop[2]; - - start[0] = estart; - stop[0] = estop; - start[1] = ostart; - stop[1] = ostop; - - // init buckets to be empty - for (uint32_t i = 0; i < 2; i++) { - for (uint32_t j = 0x00; j <= 0xff; j++) { - bucket[i][j].bp = bucket[i][j].head; - } - } - - // sort the lists into the buckets based on the MSB (contribution bits) - for (uint32_t i = 0; i < 2; i++) { - for (p1 = start[i]; p1 <= stop[i]; p1++) { - uint32_t bucket_index = (*p1 & 0xff000000) >> 24; - *(bucket[i][bucket_index].bp++) = *p1; - } - } - - - // write back intersecting buckets as sorted list. - // fill in bucket_info with head and tail of the bucket contents in the list and number of non-empty buckets. - uint32_t nonempty_bucket; - for (uint32_t i = 0; i < 2; i++) { - p1 = start[i]; - nonempty_bucket = 0; - for (uint32_t j = 0x00; j <= 0xff; j++) { - if (bucket[0][j].bp != bucket[0][j].head && bucket[1][j].bp != bucket[1][j].head) { // non-empty intersecting buckets only - bucket_info->bucket_info[i][nonempty_bucket].head = p1; - for (p2 = bucket[i][j].head; p2 < bucket[i][j].bp; *p1++ = *p2++); - bucket_info->bucket_info[i][nonempty_bucket].tail = p1 - 1; - nonempty_bucket++; - } - } - bucket_info->numbuckets = nonempty_bucket; - } -} - -/** binsearch - * Binary search for the first occurence of *stop's MSB in sorted [start,stop] - */ -static inline uint32_t* binsearch(uint32_t *start, uint32_t *stop) -{ - uint32_t mid, val = *stop & 0xff000000; - while(start != stop) - if(start[mid = (stop - start) >> 1] > val) - stop = &start[mid]; - else - start += mid + 1; - - return start; -} - /** update_contribution * helper, calculates the partial linear feedback contributions and puts in MSB */ -static inline void -update_contribution(uint32_t *item, const uint32_t mask1, const uint32_t mask2) +static inline void update_contribution(uint32_t *item, const uint32_t mask1, const uint32_t mask2) { uint32_t p = *item >> 25; @@ -126,8 +46,7 @@ update_contribution(uint32_t *item, const uint32_t mask1, const uint32_t mask2) /** extend_table * using a bit of the keystream extend the table of possible lfsr states */ -static inline void -extend_table(uint32_t *tbl, uint32_t **end, int bit, int m1, int m2, uint32_t in) +static inline void extend_table(uint32_t *tbl, uint32_t **end, int bit, int m1, int m2, uint32_t in) { in <<= 24; for(*tbl <<= 1; tbl <= *end; *++tbl <<= 1) @@ -150,17 +69,17 @@ extend_table(uint32_t *tbl, uint32_t **end, int bit, int m1, int m2, uint32_t in */ static inline void extend_table_simple(uint32_t *tbl, uint32_t **end, int bit) { - for(*tbl <<= 1; tbl <= *end; *++tbl <<= 1) + for(*tbl <<= 1; tbl <= *end; *++tbl <<= 1) { if(filter(*tbl) ^ filter(*tbl | 1)) { // replace *tbl |= filter(*tbl) ^ bit; } else if(filter(*tbl) == bit) { // insert *++*end = *++tbl; *tbl = tbl[-1] | 1; - } else // drop + } else { // drop *tbl-- = *(*end)--; + } + } } - - /** recover * recursively narrow down the search space, 4 bits of keystream at a time */ @@ -188,13 +107,11 @@ recover(uint32_t *o_head, uint32_t *o_tail, uint32_t oks, oks >>= 1; eks >>= 1; in >>= 2; - extend_table(o_head, &o_tail, oks & 1, LF_POLY_EVEN << 1 | 1, - LF_POLY_ODD << 1, 0); + extend_table(o_head, &o_tail, oks & 1, LF_POLY_EVEN << 1 | 1, LF_POLY_ODD << 1, 0); if(o_head > o_tail) return sl; - extend_table(e_head, &e_tail, eks & 1, LF_POLY_ODD, - LF_POLY_EVEN << 1 | 1, in & 3); + extend_table(e_head, &e_tail, eks & 1, LF_POLY_ODD, LF_POLY_EVEN << 1 | 1, in & 3); if(e_head > e_tail) return sl; } @@ -240,14 +157,15 @@ struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in) // allocate memory for out of place bucket_sort bucket_array_t bucket; - for (uint32_t i = 0; i < 2; i++) + + for (uint32_t i = 0; i < 2; i++) { for (uint32_t j = 0; j <= 0xff; j++) { bucket[i][j].head = malloc(sizeof(uint32_t)<<14); if (!bucket[i][j].head) { - goto out; + goto out; } } - + } // initialize statelists: add all possible states which would result into the rightmost 2 bits of the keystream for(i = 1 << 20; i >= 0; --i) { @@ -267,21 +185,18 @@ struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in) // 22 bits to go to recover 32 bits in total. From now on, we need to take the "in" // parameter into account. in = (in >> 16 & 0xff) | (in << 16) | (in & 0xff00); // Byte swapping - recover(odd_head, odd_tail, oks, - even_head, even_tail, eks, 11, statelist, in << 1, bucket); - + recover(odd_head, odd_tail, oks, even_head, even_tail, eks, 11, statelist, in << 1, bucket); out: - free(odd_head); - free(even_head); for (uint32_t i = 0; i < 2; i++) for (uint32_t j = 0; j <= 0xff; j++) free(bucket[i][j].head); - + free(odd_head); + free(even_head); return statelist; } -static const uint32_t S1[] = { 0x62141, 0x310A0, 0x18850, 0x0C428, 0x06214, +static const uint32_t S1[] = { 0x62141, 0x310A0, 0x18850, 0x0C428, 0x06214, 0x0310A, 0x85E30, 0xC69AD, 0x634D6, 0xB5CDE, 0xDE8DA, 0x6F46D, 0xB3C83, 0x59E41, 0xA8995, 0xD027F, 0x6813F, 0x3409F, 0x9E6FA}; static const uint32_t S2[] = { 0x3A557B00, 0x5D2ABD80, 0x2E955EC0, 0x174AAF60, @@ -552,6 +467,21 @@ static struct Crypto1State* check_pfx_parity(uint32_t prefix, uint32_t rresp, ui return sl + good; } +static struct Crypto1State* check_pfx_parity_ex(uint32_t prefix, uint32_t odd, uint32_t even, struct Crypto1State* sl) { + + uint32_t c = 0; + + sl->odd = odd ^ fastfwd[1][c]; + sl->even = even ^ fastfwd[0][c]; + + lfsr_rollback_bit(sl, 0, 0); + lfsr_rollback_bit(sl, 0, 0); + lfsr_rollback_bit(sl, 0, 0); + lfsr_rollback_word(sl, 0, 0); + lfsr_rollback_word(sl, prefix | c << 5, 1); + + return ++sl; +} /** lfsr_common_prefix * Implentation of the common prefix attack. @@ -571,12 +501,11 @@ 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) << 21); + s = statelist = malloc((sizeof *statelist) << 20); if(!s || !odd || !even) { free(statelist); - free(odd); - free(even); - return 0; + statelist = 0; + goto out; } for(o = odd; *o + 1; ++o) @@ -588,7 +517,39 @@ struct Crypto1State* lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8] } s->odd = s->even = 0; +out: + free(odd); + free(even); + return statelist; +} +struct Crypto1State* lfsr_common_prefix_ex(uint32_t pfx, uint8_t ks[8]) +{ + 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); + if(!s || !odd || !even) { + free(statelist); + statelist = 0; + goto out; + } + + for(o = odd; *o + 1; ++o) + for(e = even; *e + 1; ++e) + for(top = 0; top < 64; ++top) { + *o += 1 << 21; + *e += (!(top & 7) + 1) << 21; + s = check_pfx_parity_ex(pfx, *o, *e, s); + } + + // in this version, -1 signifies end of states + s->odd = s->even = -1; + +out: free(odd); free(even); return statelist;