X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e98572a1e2dde603f31cc06f330c6abd295139de..7504dc50d539f1f9b0b99064f5c7d38e373890fa:/client/nonce2key/nonce2key.c diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c index b7ab7c32..95924e5e 100644 --- a/client/nonce2key/nonce2key.c +++ b/client/nonce2key/nonce2key.c @@ -9,147 +9,57 @@ //----------------------------------------------------------------------------- // MIFARE Darkside hack //----------------------------------------------------------------------------- - -#define __STDC_FORMAT_MACROS -#include -#define llx PRIx64 - #include "nonce2key.h" #include "mifarehost.h" #include "ui.h" +#include "proxmark3.h" -int compar_state(const void * a, const void * b) { - // didn't work: (the result is truncated to 32 bits) - //return (*(int64_t*)b - *(int64_t*)a); +int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_t ks_info, uint64_t * key) { - // better: - if (*(int64_t*)b == *(int64_t*)a) return 0; - else if (*(int64_t*)b > *(int64_t*)a) return 1; - else return -1; -} -int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_t ks_info, uint64_t * key) { struct Crypto1State *state; - uint32_t i, pos, rr, nr_diff, key_count;//, ks1, ks2; + uint32_t i, pos, rr = 0, nr_diff; byte_t bt, ks3x[8], par[8][8]; - uint64_t key_recovered; - int64_t *state_s; - static uint32_t last_uid; - static int64_t *last_keylist; - rr = 0; - - if (last_uid != uid && last_keylist != NULL) { - free(last_keylist); - last_keylist = NULL; - } - last_uid = uid; // Reset the last three significant bits of the reader nonce nr &= 0xffffff1f; PrintAndLog("\nuid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08"llx")\n\n", uid, nt, par_info, ks_info, nr); - for (pos=0; pos<8; pos++) { + for ( pos = 0; pos < 8; pos++ ) { ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f; bt = (par_info >> (pos*8)) & 0xff; - for (i=0; i<8; i++) { + + for ( i = 0; i < 8; i++) { par[7-pos][i] = (bt >> i) & 0x01; } } printf("|diff|{nr} |ks3|ks3^5|parity |\n"); printf("+----+--------+---+-----+---------------+\n"); - for (i=0; i<8; i++) { + + for ( i = 0; i < 8; i++) { nr_diff = nr | i << 5; - printf("| %02x |%08x|", i << 5, nr_diff); - printf(" %01x | %01x |", ks3x[i], ks3x[i]^5); - for (pos=0; pos<7; pos++) - printf("%01x,", par[i][pos]); + printf("| %02x |%08x| %01x | %01x |", i << 5, nr_diff, ks3x[i], ks3x[i]^5); + + for (pos = 0; pos < 7; pos++) printf("%01x,", par[i][pos]); printf("%01x|\n", par[i][7]); } printf("+----+--------+---+-----+---------------+\n"); - if ( par_info == 0 ) - PrintAndLog("Parity is all zero, try special attack! Wait for few more seconds..."); - - state = lfsr_common_prefix(nr, rr, ks3x, par, par_info==0); - state_s = (int64_t*)state; - - //char filename[50] ; - //sprintf(filename, "nt_%08x_%d.txt", nt, nr); - //printf("name %s\n", filename); - //FILE* fp = fopen(filename,"w"); - for (i = 0; (state) && ((state + i)->odd != -1); i++) - { - lfsr_rollback_word(state+i, uid^nt, 0); - crypto1_get_lfsr(state + i, &key_recovered); - *(state_s + i) = key_recovered; - //fprintf(fp, "%012llx\n",key_recovered); - } - //fclose(fp); - - if(!state) - return 1; - - qsort(state_s, i, sizeof(*state_s), compar_state); - *(state_s + i) = -1; - - //Create the intersection: - if (par_info == 0 ) { - if ( last_keylist != NULL) { - int64_t *p1, *p2, *p3; - p1 = p3 = last_keylist; - p2 = state_s; - while ( *p1 != -1 && *p2 != -1 ) { - if (compar_state(p1, p2) == 0) { - printf("p1:%"llx" p2:%"llx" p3:%"llx" key:%012"llx"\n", - (uint64_t)(p1-last_keylist), - (uint64_t)(p2-state_s), - (uint64_t)(p3-last_keylist), - *p1); - *p3++ = *p1++; - p2++; - } else { - while (compar_state(p1, p2) == -1) ++p1; - while (compar_state(p1, p2) == 1) ++p2; - } - } - key_count = p3 - last_keylist; - } else { - key_count = 0; - } - } else { - last_keylist = state_s; - key_count = i; - } - - printf("key candidates count: %d\n", key_count); + clock_t t1 = clock(); - // The list may still contain several key candidates. Test each of them with mfCheckKeys - int res; - uint8_t keyBlock[6]; - uint64_t key64; - for (i = 0; i < key_count; i++) { + state = lfsr_common_prefix(nr, rr, ks3x, par); + lfsr_rollback_word(state, uid^nt, 0); + crypto1_get_lfsr(state, key); + crypto1_destroy(state); - key64 = *(last_keylist + i); - num_to_bytes(key64, 6, keyBlock); - key64 = 0; - res = mfCheckKeys(0, 0, false, 1, keyBlock, &key64); - if (!res) { - *key = key64; - free(last_keylist); - last_keylist = NULL; - if (par_info == 0) - free(state); - return 0; - } - } - - free(last_keylist); - last_keylist = state_s; - return 1; + t1 = clock() - t1; + if ( t1 > 0 ) PrintAndLog("Time in nonce2key: %.0f ticks \n", (float)t1); + return 0; } +// *outputkey is not used... int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ struct Crypto1State *s,*t; @@ -188,24 +98,26 @@ int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ crypto1_word(t, uid ^ nt, 0); crypto1_word(t, nr1_enc, 1); if (ar1_enc == (crypto1_word(t, 0, 0) ^ prng_successor(nt, 64))) { - PrintAndLog("Found Key: [%012"llx"]",key); + PrintAndLog("Found Key: [%012"llx"]", key); isSuccess = TRUE; ++counter; if (counter==20) break; } } - free(s); + + num_to_bytes(key, 6, outputkey); + crypto1_destroy(t); return isSuccess; } int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ - struct Crypto1State *s,*t; + struct Crypto1State *s, *t; uint64_t key; // recovered key uint32_t uid; // serial number - uint32_t nt0; // tag challenge first - uint32_t nt1; // tag challenge second + uint32_t nt0; // tag challenge first + uint32_t nt1; // tag challenge second uint32_t nr0_enc; // first encrypted reader challenge uint32_t ar0_enc; // first encrypted reader response uint32_t nr1_enc; // second encrypted reader challenge @@ -239,7 +151,8 @@ int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ break; } } - free(s); + num_to_bytes(key, 6, outputkey); + crypto1_destroy(t); return isSuccess; } @@ -260,9 +173,9 @@ int tryMfk64(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ pcs = &mpcs; uid = myuid;//(uint32_t)bytes_to_num(data + 0, 4); - nt = *(uint32_t*)(data+8); - nr_enc = *(uint32_t*)(data+12); - ar_enc = *(uint32_t*)(data+16); + nt = *(uint32_t*)(data+8); + nr_enc = *(uint32_t*)(data+12); + ar_enc = *(uint32_t*)(data+16); crypto1_word(pcs, nr_enc , 1); at_enc = prng_successor(nt, 96) ^ crypto1_word(pcs, 0, 0); @@ -285,7 +198,7 @@ int tryMfk64(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ lfsr_rollback_word(revstate, uid ^ nt, 0); crypto1_get_lfsr(revstate, &key); PrintAndLog("Found Key: [%012"llx"]",key); + num_to_bytes(key, 6, outputkey); crypto1_destroy(revstate); - crypto1_destroy(pcs); return 0; -} \ No newline at end of file +}