X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/660d641a03456e99ea83c68dbd3d03bae2b64573..88a2610af579e01e46abd05423827f5cdfe68a1c:/client/nonce2key/nonce2key.c diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c index 7459f1bb..b7ab7c32 100644 --- a/client/nonce2key/nonce2key.c +++ b/client/nonce2key/nonce2key.c @@ -15,55 +15,277 @@ #define llx PRIx64 #include "nonce2key.h" +#include "mifarehost.h" #include "ui.h" -int nonce2key(uint32_t uid, uint32_t nt, uint64_t par_info, uint64_t ks_info, uint64_t * key) { - struct Crypto1State *state, *state_s; - uint32_t pos, nr, rr, nr_diff;//, ks1, ks2; - byte_t bt, i, ks3x[8], par[8][8]; - uint64_t key_recovered; - nr = rr = 0; +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); + + // 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; + 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; - // Reset the last three significant bits of the reader nonce - nr &= 0xffffff1f; + 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")\n\n",uid,nt,par_info,ks_info); - - 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++) - { - par[7-pos][i] = (bt >> i) & 0x01; - } - } - - printf("|diff|{nr} |ks3|ks3^5|parity |\n"); - printf("+----+--------+---+-----+---------------+\n"); - 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("%01x|\n", par[i][7]); - } + 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++) { + ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f; + bt = (par_info >> (pos*8)) & 0xff; + 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++) { + 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("%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); - state_s = 0; - for (i = 0; (state) && ((state + i)->odd != 0 || (state + i)->even != 0) && (i < 10); i++) + 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++) { - printf("%08x|%08x\n",(state+i)->odd, (state+i)->even); - state_s = state + 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; } - if (!state_s) return 1; - lfsr_rollback_word(state_s, uid^nt, 0); - crypto1_get_lfsr(state_s, &key_recovered); - if (!state) free(state); + printf("key candidates count: %d\n", key_count); + + // 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++) { + + 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; + } + } - *key = key_recovered; + free(last_keylist); + last_keylist = state_s; + return 1; +} + +int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ + + struct Crypto1State *s,*t; + uint64_t key; // recovered key + uint32_t uid; // serial number + uint32_t nt; // tag challenge + uint32_t nr0_enc; // first encrypted reader challenge + uint32_t ar0_enc; // first encrypted reader response + uint32_t nr1_enc; // second encrypted reader challenge + uint32_t ar1_enc; // second encrypted reader response + bool isSuccess = FALSE; + int counter = 0; + + uid = myuid;//(uint32_t)bytes_to_num(data + 0, 4); + nt = *(uint32_t*)(data+8); + nr0_enc = *(uint32_t*)(data+12); + ar0_enc = *(uint32_t*)(data+16); + nr1_enc = *(uint32_t*)(data+32); + ar1_enc = *(uint32_t*)(data+36); + + // PrintAndLog("recovering key for:"); + // PrintAndLog(" uid: %08x %08x",uid, myuid); + // PrintAndLog(" nt: %08x",nt); + // PrintAndLog(" {nr_0}: %08x",nr0_enc); + // PrintAndLog(" {ar_0}: %08x",ar0_enc); + // PrintAndLog(" {nr_1}: %08x",nr1_enc); + // PrintAndLog(" {ar_1}: %08x",ar1_enc); + + s = lfsr_recovery32(ar0_enc ^ prng_successor(nt, 64), 0); - return 0; + for(t = s; t->odd | t->even; ++t) { + lfsr_rollback_word(t, 0, 0); + lfsr_rollback_word(t, nr0_enc, 1); + lfsr_rollback_word(t, uid ^ nt, 0); + crypto1_get_lfsr(t, &key); + 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); + isSuccess = TRUE; + ++counter; + if (counter==20) + break; + } + } + free(s); + return isSuccess; } + +int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ + + 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 nr0_enc; // first encrypted reader challenge + uint32_t ar0_enc; // first encrypted reader response + uint32_t nr1_enc; // second encrypted reader challenge + uint32_t ar1_enc; // second encrypted reader response + bool isSuccess = FALSE; + int counter = 0; + + uid = myuid;//(uint32_t)bytes_to_num(data + 0, 4); + nt0 = *(uint32_t*)(data+8); + nr0_enc = *(uint32_t*)(data+12); + ar0_enc = *(uint32_t*)(data+16); + nt1 = *(uint32_t*)(data+8); + nr1_enc = *(uint32_t*)(data+32); + ar1_enc = *(uint32_t*)(data+36); + + s = lfsr_recovery32(ar0_enc ^ prng_successor(nt0, 64), 0); + + for(t = s; t->odd | t->even; ++t) { + lfsr_rollback_word(t, 0, 0); + lfsr_rollback_word(t, nr0_enc, 1); + lfsr_rollback_word(t, uid ^ nt0, 0); + crypto1_get_lfsr(t, &key); + + crypto1_word(t, uid ^ nt1, 0); + crypto1_word(t, nr1_enc, 1); + if (ar1_enc == (crypto1_word(t, 0, 0) ^ prng_successor(nt1, 64))) { + PrintAndLog("Found Key: [%012"llx"]",key); + isSuccess = TRUE; + ++counter; + if (counter==20) + break; + } + } + free(s); + return isSuccess; +} + +int tryMfk64(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ + + struct Crypto1State *revstate; + uint64_t key; // recovered key + uint32_t uid; // serial number + uint32_t nt; // tag challenge + uint32_t nr_enc; // encrypted reader challenge + uint32_t ar_enc; // encrypted reader response + uint32_t at_enc; // encrypted tag response + uint32_t ks2; // keystream used to encrypt reader response + uint32_t ks3; // keystream used to encrypt tag response + + struct Crypto1State mpcs = {0, 0}; + struct Crypto1State *pcs; + 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); + + crypto1_word(pcs, nr_enc , 1); + at_enc = prng_successor(nt, 96) ^ crypto1_word(pcs, 0, 0); + + // printf("Recovering key for:\n"); + // printf(" uid: %08x\n",uid); + // printf(" nt: %08x\n",nt); + // printf(" {nr}: %08x\n",nr_enc); + // printf(" {ar}: %08x\n",ar_enc); + // printf(" {at}: %08x\n",at_enc); + + // Extract the keystream from the messages + ks2 = ar_enc ^ prng_successor(nt, 64); + ks3 = at_enc ^ prng_successor(nt, 96); + + revstate = lfsr_recovery64(ks2, ks3); + lfsr_rollback_word(revstate, 0, 0); + lfsr_rollback_word(revstate, 0, 0); + lfsr_rollback_word(revstate, nr_enc, 1); + lfsr_rollback_word(revstate, uid ^ nt, 0); + crypto1_get_lfsr(revstate, &key); + PrintAndLog("Found Key: [%012"llx"]",key); + crypto1_destroy(revstate); + crypto1_destroy(pcs); + return 0; +} \ No newline at end of file