//-----------------------------------------------------------------------------
void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
+ #define ATTACK_KEY_COUNT 8 // keep same as define in cmdhfmf.c -> readerAttack()
+
uint8_t sak = 0;
uint32_t cuid = 0;
uint32_t nonce = 0;
uint8_t cardAUTHSC = 0;
uint8_t cardAUTHKEY = 0xff; // no authentication
// allow collecting up to 8 sets of nonces to allow recovery of up to 8 keys
- #define ATTACK_KEY_COUNT 8 // keep same as define in cmdhfmf.c -> readerAttack()
+
nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; // for 2 separate attack types (nml, moebius)
memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
response3a[0] = sak & 0xFB;
ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
- uint8_t response5[] = { 0x01, 0x01, 0x01, 0x01 }; // Very random tag nonce
+ // Tag NONCE.
+ uint8_t response5[4];
+ nonce = prand();
+ num_to_bytes(nonce, 4, response5);
+
uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS:
// Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present,
// TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
// TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us)
// TC(1) = 0x02: CID supported, NAD not supported
ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);
-
- // the randon nonce
- nonce = bytes_to_num(response5, 4);
// Prepare GET_VERSION (different for UL EV-1 / NTAG)
// uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7}; //EV1 48bytes VERSION.
}
// incease nonce at every command recieved
- nonce++;
+ nonce = prand();
num_to_bytes(nonce, 4, response5);
p_response = NULL;
// Collect AR/NR per keytype & sector
if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
+
for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
- if ( ar_nr_collected[i+mM]==0 || ((cardAUTHSC == ar_nr_resp[i+mM].sector) && (cardAUTHKEY == ar_nr_resp[i+mM].keytype) && (ar_nr_collected[i+mM] > 0)) ) {
+
+ if ( ar_nr_collected[i+mM] == 0 || (
+ (cardAUTHSC == ar_nr_resp[i+mM].sector) &&
+ (cardAUTHKEY == ar_nr_resp[i+mM].keytype) &&
+ (ar_nr_collected[i+mM] > 0)
+ )
+ ) {
+
// if first auth for sector, or matches sector and keytype of previous auth
if (ar_nr_collected[i+mM] < 2) {
// if we haven't already collected 2 nonces for this sector
BigBuf_free_keep_EM();
LED_A_OFF();
- if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
+ if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
for ( uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
if (ar_nr_collected[i] == 2) {
Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
memset(uid_ptr,0,10);
}
+ // reset the PCB block number
+ iso14_pcb_blocknum = 0;
+
// check for proprietary anticollision:
if ((resp[0] & 0x1F) == 0) return 3;
p_hi14a_card->ats_len = len;
}
- // reset the PCB block number
- iso14_pcb_blocknum = 0;
-
// set default timeout based on ATS
iso14a_set_ATS_timeout(resp);
-
return 1;
}
}
if (param & ISO14A_RAW) {
- if(param & ISO14A_APPEND_CRC) {
- if(param & ISO14A_TOPAZMODE) {
+ if (param & ISO14A_APPEND_CRC) {
+ if (param & ISO14A_TOPAZMODE)
AppendCrc14443b(cmd,len);
- } else {
+ else
AppendCrc14443a(cmd,len);
- }
+
len += 2;
if (lenbits) lenbits += 16;
}
- if(lenbits>0) { // want to send a specific number of bits (e.g. short commands)
- if(param & ISO14A_TOPAZMODE) {
+ if (lenbits>0) { // want to send a specific number of bits (e.g. short commands)
+ if (param & ISO14A_TOPAZMODE) {
int bits_to_send = lenbits;
uint16_t i = 0;
ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity
ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity
}
} else { // want to send complete bytes only
- if(param & ISO14A_TOPAZMODE) {
+ if (param & ISO14A_TOPAZMODE) {
uint16_t i = 0;
ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy
while (i < len) {
uint32_t nttmp1 = nt1;
uint32_t nttmp2 = nt2;
- for (uint16_t i = 1; i < 32768/8; ++i) {
+ // 0xFFFF -- Half up and half down to find distance between nonces
+ for (uint16_t i = 1; i < 32768/8; i += 8) {
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -i;
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+1;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+1);
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+2;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+2);
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+3;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+3);
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+4;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+4);
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+5;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+5);
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+6;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+6);
-
nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+7;
+
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -i;
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+1);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+2);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+3);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+4);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+5);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+6);
nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+7);
}
// either nt1 or nt2 are invalid nonces
BigBuf_free(); BigBuf_Clear_ext(false);
clear_trace();
- set_tracing(TRUE);
+ set_tracing(FALSE);
iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
sync_time = GetCountSspClk() & 0xfffffff8;
sync_cycles = PRNG_SEQUENCE_LENGTH; // Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
nt_attacked = 0;
- if (MF_DBGLEVEL >= 4) Dbprintf("Mifare::Sync %08x", sync_time);
+ if (MF_DBGLEVEL >= 4) Dbprintf("Mifare::Sync %u", sync_time);
if (first_try) {
mf_nr_ar3 = 0;
uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
- uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01}; // very random nonce
+ // TAG Nonce - Authenticate response
+ uint8_t rAUTH_NT[4];
+ uint32_t nonce = prand();
+ num_to_bytes(nonce, 4, rAUTH_NT);
+
// uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};// nonce from nested? why this?
uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
-
+
// Here, we collect CUID, NT, NR, AR, CUID2, NT2, NR2, AR2
// This can be used in a reader-only attack.
nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; // for 2 separate attack types (nml, moebius)
uint8_t mM = 0; // moebius_modifier for collection storage
bool doBufResetNext = false;
- // Authenticate response - nonce
- uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
-
// -- Determine the UID
// Can be set from emulator memory or incoming data
// Length: 4,7,or 10 bytes
crypto1_destroy(pcs);
cardAUTHKEY = 0xff;
LEDsoff();
- nonce++;
+ nonce = prand();
continue;
}
}
for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
- if ( ar_nr_collected[i+mM]==0 || ((cardAUTHSC == ar_nr_resp[i+mM].sector) && (cardAUTHKEY == ar_nr_resp[i+mM].keytype) && (ar_nr_collected[i+mM] > 0)) ) {
+
+ if ( ar_nr_collected[i+mM] == 0 || (
+ (cardAUTHSC == ar_nr_resp[i+mM].sector) &&
+ (cardAUTHKEY == ar_nr_resp[i+mM].keytype) &&
+ (ar_nr_collected[i+mM] > 0)
+ )
+ ) {
// if first auth for sector, or matches sector and keytype of previous auth
if (ar_nr_collected[i+mM] < 2) {
// if we've collected all the nonces we need - finish.
if (nonce1_count == moebius_n_count) {
- cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,0,0,&ar_nr_resp,sizeof(ar_nr_resp));
+ cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_resp, sizeof(ar_nr_resp));
nonce1_count = 0;
nonce2_count = 0;
moebius_n_count = 0;
// Interactive mode flag, means we need to send ACK
/*
- if((flags & FLAG_INTERACTIVE) == FLAG_INTERACTIVE) {
+ if((flags & FLAG_INTERACTIVE) == FLAG_INTERACTIVE && flags & FLAG_NR_AR_ATTACK == FLAG_NR_AR_ATTACK) {
// May just aswell send the collected ar_nr in the response aswell
uint8_t len = ar_nr_collected * 4 * 4;
cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, len, 0, &ar_nr_responses, len);
}
+ */
- */
if( ((flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) && MF_DBGLEVEL >= 1 ) {
for ( uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
if (ar_nr_collected[i] == 2) {
);
}
}
- }
-
+ }
- if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
+ if (MF_DBGLEVEL >= 1)
+ Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
projects / proxmark3-svn / blobdiff