X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d8af608f8e4e6dc520045bac69e8e9dac6de7d42..92014925d6c45279f974382713403b5268f72de5:/client/nonce2key/nonce2key.c diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c index 919c0a3e..3d3d1e37 100644 --- a/client/nonce2key/nonce2key.c +++ b/client/nonce2key/nonce2key.c @@ -9,176 +9,200 @@ //----------------------------------------------------------------------------- // MIFARE Darkside hack //----------------------------------------------------------------------------- +#include "nonce2key.h" -#define __STDC_FORMAT_MACROS -#include -#define llx PRIx64 +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 = 0, nr_diff; + byte_t bt, ks3x[8], par[8][8]; -#include "nonce2key.h" -#include "mifarehost.h" -#include "ui.h" + // Reset the last three significant bits of the reader nonce + nr &= 0xffffff1f; + + PrintAndLog("uid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08x)\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("+----+--------+---+-----+---------------+\n"); + printf("|diff|{nr} |ks3|ks3^5|parity |\n"); + printf("+----+--------+---+-----+---------------+\n"); + for ( i = 0; i < 8; i++) { + nr_diff = nr | i << 5; + printf("| %02x |%08x| %01x | %01x |", i << 5, nr_diff, ks3x[i], ks3x[i]^5); -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); + for (pos = 0; pos < 7; pos++) printf("%01x,", par[i][pos]); + printf("%01x|\n", par[i][7]); + } + printf("+----+--------+---+-----+---------------+\n"); + + clock_t t1 = clock(); + + state = lfsr_common_prefix(nr, rr, ks3x, par); + lfsr_rollback_word(state, uid ^ nt, 0); + crypto1_get_lfsr(state, key); + crypto1_destroy(state); - // better: + t1 = clock() - t1; + if ( t1 > 0 ) PrintAndLog("Time in nonce2key: %.0f ticks \n", (float)t1); + return 0; +} + +int compar_intA(const void * a, const void * b) { if (*(int64_t*)b == *(int64_t*)a) return 0; - else if (*(int64_t*)b > *(int64_t*)a) return 1; - else return -1; + if (*(int64_t*)b > *(int64_t*)a) return 1; + 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; - - if (last_uid != uid && last_keylist != NULL) - { - free(last_keylist); - last_keylist = NULL; - } - last_uid = uid; +// call when PAR == 0, special attack? It seems to need two calls. with same uid, block, keytype +int nonce2key_ex(uint8_t blockno, uint8_t keytype, uint32_t uid, uint32_t nt, uint32_t nr, uint64_t ks_info, uint64_t * key) { - // Reset the last three significant bits of the reader nonce - nr &= 0xffffff1f; + struct Crypto1State *state; + uint32_t i, pos, key_count; + uint8_t ks3x[8]; + uint64_t key_recovered; + int64_t *state_s; + static uint8_t last_blockno; + static uint8_t last_keytype; + static uint32_t last_uid; + static int64_t *last_keylist; - PrintAndLog("\nuid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08"llx")\n\n",uid,nt,par_info,ks_info,nr); + if (last_uid != uid && + last_blockno != blockno && + last_keytype != keytype && + last_keylist != NULL) + { + free(last_keylist); + last_keylist = NULL; + } + last_uid = uid; + last_blockno = blockno; + last_keytype = keytype; - 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; - } - } + // Reset the last three significant bits of the reader nonce + nr &= 0xffffff1f; + + // split keystream into array + for (pos=0; pos<8; pos++) { + ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f; + } + + // find possible states for this keystream + state = lfsr_common_prefix_ex(nr, ks3x); - 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]); - } - - if (par_info==0) - PrintAndLog("parity is all zero,try special attack!just wait for few more seconds..."); - - state = lfsr_common_prefix(nr, rr, ks3x, par, par_info==0); + if (!state) { + PrintAndLog("Failed getting states"); + return 1; + } + 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); + uint32_t xored = uid ^ nt; + + for (i = 0; (state) && ((state + i)->odd != -1); i++) { + lfsr_rollback_word(state + i, xored, 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); + + qsort(state_s, i, sizeof(int64_t), compar_intA); *(state_s + i) = -1; + // first call to this function. clear all other stuff and set new found states. + if (last_keylist == NULL) { + free(last_keylist); + last_keylist = state_s; + PrintAndLog("parity is all zero, testing special attack. First call, this attack needs at least two calls. Hold on..."); + PrintAndLog("uid(%08x) nt(%08x) ks(%016"llx") nr(%08x)\n", uid, nt, ks_info, nr); + return 1; + } + + PrintAndLog("uid(%08x) nt(%08x) ks(%016"llx") nr(%08x)\n", uid, nt, ks_info, nr); + //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;; + int64_t *p1, *p2, *p3; + p1 = p3 = last_keylist; + p2 = state_s; + + while ( *p1 != -1 && *p2 != -1 ) { + if (compar_intA(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 - key_count = 0; - else - { - last_keylist = state_s; - key_count = i; + else { + while (compar_intA(p1, p2) == -1) ++p1; + while (compar_intA(p1, p2) == 1) ++p2; + } + } + key_count = p3 - last_keylist; + printf("key_count: %d\n", key_count); + if ( key_count == 0 ){ + free(state); + state = NULL; + return 0; } - printf("key_count:%d\n", key_count); - - // The list may still contain several key candidates. Test each of them with mfCheckKeys + uint8_t retval = 1; + // Validate all key candidates with testing each of them with mfCheckKeys + uint8_t keyBlock[6] = {0,0,0,0,0,0}; + uint64_t key64; for (i = 0; i < key_count; i++) { - uint8_t keyBlock[6]; - uint64_t key64; key64 = *(last_keylist + i); num_to_bytes(key64, 6, keyBlock); key64 = 0; - if (!mfCheckKeys(0, 0, false, 1, keyBlock, &key64)) { + if (!mfCheckKeys(blockno, keytype, false, 1, keyBlock, &key64)) { *key = key64; - free(last_keylist); - last_keylist = NULL; - if (par_info ==0) - free(state); - return 0; + retval = 0; + goto out; } - } - + } +out: free(last_keylist); - last_keylist = state_s; - - return 1; + last_keylist = NULL; + free(state); + state = NULL; + return retval; } -int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ - +// 32 bit recover key from 2 nonces +bool tryMfk32(nonces_t data, uint64_t *outputkey, bool verbose) { 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 + uint64_t outkey = 0; + uint64_t key=0; // recovered key + uint32_t uid = data.cuid; + uint32_t nt = data.nonce; // first tag challenge (nonce) + uint32_t nr0_enc = data.nr; // first encrypted reader challenge + uint32_t ar0_enc = data.ar; // first encrypted reader response + uint32_t nr1_enc = data.nr2; // second encrypted reader challenge + uint32_t ar1_enc = data.ar2; // second encrypted reader response bool isSuccess = FALSE; - int counter = 0; + uint8_t 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); + clock_t t1 = clock(); + uint32_t p64 = prng_successor(nt, 64); + + if ( verbose ) { + printf("Recovering key for:\n"); + printf(" uid: %08x\n",uid); + printf(" nt: %08x\n",nt); + printf(" {nr_0}: %08x\n",nr0_enc); + printf(" {ar_0}: %08x\n",ar0_enc); + printf(" {nr_1}: %08x\n",nr1_enc); + printf(" {ar_1}: %08x\n",ar1_enc); + printf("\nLFSR succesors of the tag challenge:\n"); + printf(" nt': %08x\n", p64); + printf(" nt'': %08x\n", prng_successor(p64, 32)); + } + + s = lfsr_recovery32(ar0_enc ^ p64, 0); for(t = s; t->odd | t->even; ++t) { lfsr_rollback_word(t, 0, 0); @@ -187,41 +211,56 @@ int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ 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; + if (ar1_enc == (crypto1_word(t, 0, 0) ^ p64)) { + outkey = key; ++counter; - if (counter==20) - break; + if (counter==20) break; } } - free(s); + isSuccess = (counter > 0); + t1 = clock() - t1; + if ( t1 > 0 ) PrintAndLog("Time in mfkey32: %.0f ticks - possible keys %d\n", (float)t1, counter); + + *outputkey = ( isSuccess ) ? outkey : 0; + crypto1_destroy(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 tryMfk32_moebius(nonces_t data, uint64_t *outputkey, bool verbose) { + struct Crypto1State *s, *t; + uint64_t outkey = 0; + uint64_t key = 0; // recovered key + uint32_t uid = data.cuid; + uint32_t nt0 = data.nonce; // first tag challenge (nonce) + uint32_t nr0_enc = data.nr; // first encrypted reader challenge + uint32_t ar0_enc = data.ar; // first encrypted reader response + //uint32_t uid1 = le32toh(data+16); + uint32_t nt1 = data.nonce2; // second tag challenge (nonce) + uint32_t nr1_enc = data.nr2; // second encrypted reader challenge + uint32_t ar1_enc = data.ar2; // 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); + clock_t t1 = clock(); + + uint32_t p640 = prng_successor(nt0, 64); + uint32_t p641 = prng_successor(nt1, 64); + + if (verbose) { + printf("Recovering key for:\n"); + printf(" uid: %08x\n", uid); + printf(" nt_0: %08x\n", nt0); + printf(" {nr_0}: %08x\n", nr0_enc); + printf(" {ar_0}: %08x\n", ar0_enc); + printf(" nt_1: %08x\n", nt1); + printf(" {nr_1}: %08x\n", nr1_enc); + printf(" {ar_1}: %08x\n", ar1_enc); + printf("\nLFSR succesors of the tag challenge:\n"); + printf(" nt': %08x\n", p640); + printf(" nt'': %08x\n", prng_successor(p640, 32)); + } + + s = lfsr_recovery32(ar0_enc ^ p640, 0); for(t = s; t->odd | t->even; ++t) { lfsr_rollback_word(t, 0, 0); @@ -231,62 +270,54 @@ int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ 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; + if (ar1_enc == (crypto1_word(t, 0, 0) ^ p641)) { + outkey=key; ++counter; - if (counter==20) - break; + if (counter==20) break; } } - free(s); + isSuccess = (counter > 0); + t1 = clock() - t1; + if ( t1 > 0 ) PrintAndLog("Time in mfkey32_moebius: %.0f ticks - possible keys %d\n", (float)t1, counter); + + *outputkey = ( isSuccess ) ? outkey : 0; + crypto1_destroy(s); return isSuccess; } +int tryMfk64_ex(uint8_t *data, uint64_t *outputkey){ + uint32_t uid = le32toh(data); + uint32_t nt = le32toh(data+4); // tag challenge + uint32_t nr_enc = le32toh(data+8); // encrypted reader challenge + uint32_t ar_enc = le32toh(data+12); // encrypted reader response + uint32_t at_enc = le32toh(data+16); // encrypted tag response + return tryMfk64(uid, nt, nr_enc, ar_enc, at_enc, outputkey); +} -int tryMfk64(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){ - +int tryMfk64(uint32_t uid, uint32_t nt, uint32_t nr_enc, uint32_t ar_enc, uint32_t at_enc, uint64_t *outputkey){ + uint64_t key = 0; // recovered key + uint32_t ks2; // keystream used to encrypt reader response + uint32_t ks3; // keystream used to encrypt tag response 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); + PrintAndLog("Enter mfkey64"); + clock_t t1 = clock(); - 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); + + PrintAndLog("Found Key: [%012"llx"]", key); + t1 = clock() - t1; + if ( t1 > 0 ) PrintAndLog("Time in mfkey64: %.0f ticks \n", (float)t1); + + *outputkey = key; crypto1_destroy(revstate); - crypto1_destroy(pcs); return 0; }