X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b19bd5d6898f929de30e9110e011204a6c5622ad..62fab50902b259df50821666dded51c1b2571389:/client/nonce2key/nonce2key.c?ds=sidebyside diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c index 7c63722d..68cd1cd9 100644 --- a/client/nonce2key/nonce2key.c +++ b/client/nonce2key/nonce2key.c @@ -10,13 +10,14 @@ // MIFARE Darkside hack //----------------------------------------------------------------------------- -#define __STDC_FORMAT_MACROS #include -#define llx PRIx64 +#include #include "nonce2key.h" #include "mifarehost.h" #include "ui.h" +#include "util.h" +#include "crapto1/crapto1.h" int compar_state(const void * a, const void * b) { // didn't work: (the result is truncated to 32 bits) @@ -31,14 +32,14 @@ int compar_state(const void * a, const void * b) { 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]; + uint8_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) + if (last_uid != uid && last_keylist != NULL) { free(last_keylist); last_keylist = NULL; @@ -48,7 +49,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ // 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); + PrintAndLog("\nuid(%08x) nt(%08x) par(%016" PRIx64") ks(%016" PRIx64") nr(%08" PRIx32")\n\n",uid,nt,par_info,ks_info,nr); for (pos=0; pos<8; pos++) { @@ -74,7 +75,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ 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); + state = lfsr_common_prefix(nr, rr, ks3x, par); state_s = (int64_t*)state; //char filename[50] ; @@ -86,7 +87,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ 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); + //fprintf(fp, "%012" PRIx64 "\n",key_recovered); } //fclose(fp); @@ -105,7 +106,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ p2 = state_s; while ( *p1 != -1 && *p2 != -1 ) { if (compar_state(p1, p2) == 0) { - printf("p1:%d p2:%d p3:%d key:%012llx\n",p1-last_keylist, p2-state_s, p3-last_keylist,*p1); + printf("p1:%" PRIx64" p2:%" PRIx64 " p3:%" PRIx64" key:%012" PRIx64 "\n",(uint64_t)(p1-last_keylist),(uint64_t)(p2-state_s),(uint64_t)(p3-last_keylist),*p1); *p3++ = *p1++; p2++; } @@ -125,7 +126,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ } printf("key_count:%d\n", key_count); - + // The list may still contain several key candidates. Test each of them with mfCheckKeys for (i = 0; i < key_count; i++) { uint8_t keyBlock[6]; @@ -133,7 +134,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ key64 = *(last_keylist + i); num_to_bytes(key64, 6, keyBlock); key64 = 0; - if (!mfCheckKeys(0, 0, 1, keyBlock, &key64)) { + if (!mfCheckKeys(0, 0, false, 1, keyBlock, &key64)) { *key = key64; free(last_keylist); last_keylist = NULL; @@ -149,3 +150,140 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_ return 1; } + +// 32 bit recover key from 2 nonces +bool mfkey32(nonces_t data, uint64_t *outputkey) { + struct Crypto1State *s,*t; + 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 + clock_t t1 = clock(); + bool isSuccess = false; + uint8_t counter=0; + + s = lfsr_recovery32(ar0_enc ^ prng_successor(nt, 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 ^ 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" PRIx64 "]",key); + outkey = key; + counter++; + if (counter==20) break; + } + } + isSuccess = (counter == 1); + t1 = clock() - t1; + //if ( t1 > 0 ) PrintAndLog("Time in mfkey32: %.0f ticks \nFound %d possible keys", (float)t1, counter); + *outputkey = ( isSuccess ) ? outkey : 0; + crypto1_destroy(s); + /* //un-comment to save all keys to a stats.txt file + FILE *fout; + if ((fout = fopen("stats.txt","ab")) == NULL) { + PrintAndLog("Could not create file name stats.txt"); + return 1; + } + fprintf(fout, "mfkey32,%d,%08x,%d,%s,%04x%08x,%.0Lf\r\n", counter, data.cuid, data.sector, (data.keytype) ? "B" : "A", (uint32_t)(outkey>>32) & 0xFFFF,(uint32_t)(outkey&0xFFFFFFFF),(long double)t1); + fclose(fout); + */ + return isSuccess; +} + +bool tryMfk32_moebius(nonces_t data, uint64_t *outputkey) { + 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 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; + + //PrintAndLog("Enter mfkey32_moebius"); + clock_t t1 = clock(); + + 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" PRIx64 "]",key); + outkey=key; + ++counter; + if (counter==20) + break; + } + } + isSuccess = (counter == 1); + t1 = clock() - t1; + //if ( t1 > 0 ) PrintAndLog("Time in mfkey32_moebius: %.0f ticks \nFound %d possible keys", (float)t1,counter); + *outputkey = ( isSuccess ) ? outkey : 0; + crypto1_destroy(s); + /* // un-comment to output all keys to stats.txt + FILE *fout; + if ((fout = fopen("stats.txt","ab")) == NULL) { + PrintAndLog("Could not create file name stats.txt"); + return 1; + } + fprintf(fout, "moebius,%d,%08x,%d,%s,%04x%08x,%0.Lf\r\n", counter, data.cuid, data.sector, (data.keytype) ? "B" : "A", (uint32_t) (outkey>>32),(uint32_t)(outkey&0xFFFFFFFF),(long double)t1); + fclose(fout); + */ + 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(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; + + PrintAndLog("Enter mfkey64"); + clock_t t1 = clock(); + + // 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" PRIx64 "]", key); + crypto1_destroy(revstate); + *outputkey = key; + + t1 = clock() - t1; + if ( t1 > 0 ) PrintAndLog("Time in mfkey64: %.0f ticks \n", (float)t1); + return 0; +} +