X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/2ef3a5e99c8b27b06f860988783e1040a6dea705..a37725facfb70e0d699f423c6d986173ef890531:/client/mifarehost.c diff --git a/client/mifarehost.c b/client/mifarehost.c index a01d3b5f..e1ced176 100644 --- a/client/mifarehost.c +++ b/client/mifarehost.c @@ -20,6 +20,7 @@ #include "usb_cmd.h" #include "cmdmain.h" #include "ui.h" +#include "parity.h" #include "util.h" #include "iso14443crc.h" @@ -73,13 +74,12 @@ static uint32_t intersection(uint64_t *list1, uint64_t *list2) // Darkside attack (hf mf mifare) -static uint32_t nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_t ks_info, uint64_t **keys) { +static uint32_t nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint32_t ar, uint64_t par_info, uint64_t ks_info, uint64_t **keys) { struct Crypto1State *states; - uint32_t i, pos, rr; //nr_diff; + uint32_t i, pos; uint8_t bt, ks3x[8], par[8][8]; uint64_t key_recovered; - static uint64_t *keylist; - rr = 0; + uint64_t *keylist; // Reset the last three significant bits of the reader nonce nr &= 0xffffff1f; @@ -92,7 +92,7 @@ static uint32_t nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_i } } - states = lfsr_common_prefix(nr, rr, ks3x, par, (par_info == 0)); + states = lfsr_common_prefix(nr, ar, ks3x, par, (par_info == 0)); if (states == NULL) { *keys = NULL; @@ -116,7 +116,7 @@ static uint32_t nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_i int mfDarkside(uint64_t *key) { uint32_t uid = 0; - uint32_t nt = 0, nr = 0; + uint32_t nt = 0, nr = 0, ar = 0; uint64_t par_list = 0, ks_list = 0; uint64_t *keylist = NULL, *last_keylist = NULL; uint32_t keycount = 0; @@ -159,18 +159,18 @@ int mfDarkside(uint64_t *key) nt = (uint32_t)bytes_to_num(resp.d.asBytes + 4, 4); par_list = bytes_to_num(resp.d.asBytes + 8, 8); ks_list = bytes_to_num(resp.d.asBytes + 16, 8); - nr = bytes_to_num(resp.d.asBytes + 24, 4); + nr = (uint32_t)bytes_to_num(resp.d.asBytes + 24, 4); + ar = (uint32_t)bytes_to_num(resp.d.asBytes + 28, 4); break; } } if (par_list == 0 && c.arg[0] == true) { PrintAndLog("Parity is all zero. Most likely this card sends NACK on every failed authentication."); - PrintAndLog("Attack will take a few seconds longer because we need two consecutive successful runs."); } c.arg[0] = false; - keycount = nonce2key(uid, nt, nr, par_list, ks_list, &keylist); + keycount = nonce2key(uid, nt, nr, ar, par_list, ks_list, &keylist); if (keycount == 0) { PrintAndLog("Key not found (lfsr_common_prefix list is null). Nt=%08x", nt); @@ -201,9 +201,9 @@ int mfDarkside(uint64_t *key) int size = keycount - i > max_keys ? max_keys : keycount - i; for (int j = 0; j < size; j++) { if (par_list == 0) { - num_to_bytes(last_keylist[i*max_keys + j], 6, keyBlock); + num_to_bytes(last_keylist[i*max_keys + j], 6, keyBlock+(j*6)); } else { - num_to_bytes(keylist[i*max_keys + j], 6, keyBlock); + num_to_bytes(keylist[i*max_keys + j], 6, keyBlock+(j*6)); } } if (!mfCheckKeys(0, 0, false, size, keyBlock, key)) { @@ -583,14 +583,19 @@ struct Crypto1State *traceCrypto1 = NULL; struct Crypto1State *revstate; uint64_t lfsr; +uint64_t ui64Key; uint32_t ks2; uint32_t ks3; -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 uid; // serial number +uint32_t nt; // tag challenge +uint32_t nt_enc; // encrypted tag challenge +uint8_t nt_enc_par; // encrypted tag challenge parity +uint32_t nr_enc; // encrypted reader challenge +uint32_t ar_enc; // encrypted reader response +uint8_t ar_enc_par; // encrypted reader response parity +uint32_t at_enc; // encrypted tag response +uint8_t at_enc_par; // encrypted tag response parity int isTraceCardEmpty(void) { return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0)); @@ -709,8 +714,36 @@ void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool i return; } +bool NTParityCheck(uint32_t ntx) { + if ( + (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((nt_enc_par >> 5) & 0x01) ^ (nt_enc & 0x01)) || + (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((nt_enc_par >> 6) & 0x01) ^ (nt_enc >> 8 & 0x01)) || + (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((nt_enc_par >> 7) & 0x01) ^ (nt_enc >> 16 & 0x01)) + ) + return false; + + uint32_t ar = prng_successor(ntx, 64); + if ( + (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ar_enc_par >> 5) & 0x01) ^ (ar_enc & 0x01)) || + (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ar_enc_par >> 6) & 0x01) ^ (ar_enc >> 8 & 0x01)) || + (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ar_enc_par >> 7) & 0x01) ^ (ar_enc >> 16 & 0x01)) + ) + return false; + + uint32_t at = prng_successor(ntx, 96); + if ( + (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ar_enc_par >> 4) & 0x01) ^ (at_enc >> 24 & 0x01)) || + (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((at_enc_par >> 5) & 0x01) ^ (at_enc & 0x01)) || + (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((at_enc_par >> 6) & 0x01) ^ (at_enc >> 8 & 0x01)) || + (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((at_enc_par >> 7) & 0x01) ^ (at_enc >> 16 & 0x01)) + ) + return false; + + return true; +} -int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { + +int mfTraceDecode(uint8_t *data_src, int len, uint8_t parity, bool wantSaveToEmlFile) { uint8_t data[64]; if (traceState == TRACE_ERROR) return 1; @@ -722,7 +755,9 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { memcpy(data, data_src, len); if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) { mf_crypto1_decrypt(traceCrypto1, data, len, 0); - PrintAndLog("dec> %s", sprint_hex(data, len)); + uint8_t parity[16]; + oddparitybuf(data, len, parity); + PrintAndLog("dec> %s [%s]", sprint_hex(data, len), printBitsPar(parity, len)); AddLogHex(logHexFileName, "dec> ", data, len); } @@ -811,7 +846,12 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { case TRACE_AUTH1: if (len == 4) { traceState = TRACE_AUTH2; - nt = bytes_to_num(data, 4); + if (!traceCrypto1) { + nt = bytes_to_num(data, 4); + } else { + nt_enc = bytes_to_num(data, 4); + nt_enc_par = parity; + } return 0; } else { traceState = TRACE_ERROR; @@ -825,6 +865,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { nr_enc = bytes_to_num(data, 4); ar_enc = bytes_to_num(data + 4, 4); + ar_enc_par = parity << 4; return 0; } else { traceState = TRACE_ERROR; @@ -836,8 +877,9 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { if (len ==4) { traceState = TRACE_IDLE; + at_enc = bytes_to_num(data, 4); + at_enc_par = parity; if (!traceCrypto1) { - at_enc = bytes_to_num(data, 4); // decode key here) ks2 = ar_enc ^ prng_successor(nt, 64); @@ -849,16 +891,75 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { lfsr_rollback_word(revstate, uid ^ nt, 0); crypto1_get_lfsr(revstate, &lfsr); - printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF)); + crypto1_destroy(revstate); + ui64Key = lfsr; + printf("key> probable key:%x%x Prng:%s ks2:%08x ks3:%08x\n", + (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF), + validate_prng_nonce(nt) ? "WEAK": "HARDEND", + ks2, + ks3); AddLogUint64(logHexFileName, "key> ", lfsr); } else { - printf("key> nested not implemented!\n"); - at_enc = bytes_to_num(data, 4); + if (validate_prng_nonce(nt)) { + struct Crypto1State *pcs; + pcs = crypto1_create(ui64Key); + uint32_t nt1 = crypto1_word(pcs, nt_enc ^ uid, 1) ^ nt_enc; + uint32_t ar = prng_successor(nt1, 64); + uint32_t at = prng_successor(nt1, 96); + printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", uid, nt1, printBitsPar(&nt_enc_par, 4), ar, at); + uint32_t nr1 = crypto1_word(pcs, nr_enc, 1) ^ nr_enc; + uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ar_enc; + uint32_t at1 = crypto1_word(pcs, 0, 0) ^ at_enc; + printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1); + + if (NTParityCheck(nt1)) + printf("key> the same key test OK. key=%x%x\n", (unsigned int)((ui64Key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(ui64Key & 0xFFFFFFFF)); + else + printf("key> the same key test. check nt parity error.\n"); + + uint32_t ntc = prng_successor(nt, 90); + uint32_t ntx = 0; + int ntcnt = 0; + for (int i = 0; i < 16383; i++) { + ntc = prng_successor(ntc, 1); + if (NTParityCheck(ntc)){ + if (!ntcnt) + ntx = ntc; + ntcnt++; + } + } + if (ntcnt) + printf("key> nt candidate=%08x nonce distance=%d candidates count=%d\n", ntx, nonce_distance(nt, ntx), ntcnt); + else + printf("key> don't have any nt candidate( \n"); + + nt = ntx; + ks2 = ar_enc ^ prng_successor(ntx, 64); + ks3 = at_enc ^ prng_successor(ntx, 96); + + // decode key + 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, &lfsr); + crypto1_destroy(revstate); + ui64Key = lfsr; + printf("key> probable key:%x%x ks2:%08x ks3:%08x\n", + (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF), + ks2, + ks3); + AddLogUint64(logHexFileName, "key> ", lfsr); + } else { + printf("key> hardnested not implemented!\n"); - crypto1_destroy(traceCrypto1); + crypto1_destroy(traceCrypto1); - // not implemented - traceState = TRACE_ERROR; + // not implemented + traceState = TRACE_ERROR; + } } int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;