* FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
* FLAG_10B_UID_IN_DATA - use 10-byte UID in the data-section not finished
* FLAG_NR_AR_ATTACK - means we should collect NR_AR responses for bruteforcing later
+ * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack)
*@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ...
* (unless reader attack mode enabled then it runs util it gets enough nonces to recover all keys attmpted)
*/
{
int cardSTATE = MFEMUL_NOFIELD;
int _UID_LEN = 0; // 4, 7, 10
- int _7BUID = 0;
int vHf = 0; // in mV
int res;
uint32_t selTimer = 0;
uint8_t response[MAX_MIFARE_FRAME_SIZE];
uint8_t response_par[MAX_MIFARE_PARITY_SIZE];
- uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID
+ uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID
uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
- uint8_t rSAK[] = {0x08, 0xb6, 0xdd};
- uint8_t rSAK1[] = {0x04, 0xda, 0x17};
- uint8_t rSAK2[] = {0x04, 0xda, 0x17}; //need to look up
+ uint8_t rSAKfinal[]= {0x08, 0xb6, 0xdd}; // mifare 1k indicated
+ uint8_t rSAK1[] = {0x04, 0xda, 0x17}; // indicate UID not finished
uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
//Here, we collect UID,sector,keytype,NT,AR,NR,NT2,AR2,NR2
// This will be used in the reader-only attack.
- //allow collecting up to 8 sets of nonces to allow recovery of 8 keys
- #define ATTACK_KEY_COUNT 8
- nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; //*2 for 2 separate attack types
+ //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]; //*2 for 2 separate attack types (nml, moebius)
memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
- uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2];
+ uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; //*2 for 2nd attack type (moebius)
memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
- bool collectMoebius = false;
uint8_t nonce1_count = 0;
uint8_t nonce2_count = 0;
uint8_t moebius_n_count = 0;
+ bool gettingMoebius = false;
uint8_t mM = 0; //moebius_modifier for collection storage
// Authenticate response - nonce
- uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
+ uint32_t nonce;
+ if (flags & FLAG_RANDOM_NONCE) {
+ nonce = prand();
+ } else {
+ nonce = bytes_to_num(rAUTH_NT, 4);
+ }
//-- Determine the UID
// Can be set from emulator memory, incoming data
// 7B uid comes from data-portion of packet
memcpy(&rUIDBCC1[1],datain,3);
memcpy(rUIDBCC2, datain+3, 4);
- _7BUID = true;
_UID_LEN = 7;
} else if (flags & FLAG_10B_UID_IN_DATA) {
memcpy(&rUIDBCC1[1], datain, 3);
} else {
// get UID from emul memory - guess at length
emlGetMemBt(receivedCmd, 7, 1);
- _7BUID = !(receivedCmd[0] == 0x00);
- if (!_7BUID) { // ---------- 4BUID
+ if (receivedCmd[0] == 0x00) { // ---------- 4BUID
emlGetMemBt(rUIDBCC1, 0, 4);
_UID_LEN = 4;
} else { // ---------- 7BUID
set_tracing(TRUE);
bool finished = FALSE;
- while (!BUTTON_PRESS() && !finished && !usb_poll_validate_length()) {
+ bool button_pushed = BUTTON_PRESS();
+ while (!button_pushed && !finished && !usb_poll_validate_length()) {
WDT_HIT();
// find reader field
cardSTATE_TO_IDLE();
LED_A_ON();
}
- }
+ }
if (cardSTATE == MFEMUL_NOFIELD) continue;
//Now, get data
} else if (res == 1) {
break; //return value 1 means button press
}
-
+
// REQ or WUP request in ANY state and WUP in HALTED state
if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
selTimer = GetTickCount();
LED_C_OFF();
crypto1_destroy(pcs);
cardAUTHKEY = 0xff;
+ if (flags & FLAG_RANDOM_NONCE) {
+ nonce = prand();
+ }
continue;
}
break;
}
case MFEMUL_SELECT1:{
- // select all
- if (len == 2 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x20)) {
+ // select all - 0x93 0x20
+ if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
if (MF_DBGLEVEL >= 4) Dbprintf("SELECT ALL received");
EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1));
break;
}
- if (MF_DBGLEVEL >= 4 && len == 9 && receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 )
- {
- Dbprintf("SELECT %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
- }
- // select card
- // check correct sak values... (marshmellow)
- if (len == 9 &&
- (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
+ // select card - 0x93 0x70 ...
+ if (len == 9 &&
+ (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
+ if (MF_DBGLEVEL >= 4)
+ Dbprintf("SELECT %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
+
switch(_UID_LEN) {
case 4:
cardSTATE = MFEMUL_WORK;
LED_B_ON();
if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
- EmSendCmd(rSAK, sizeof(rSAK));
+ EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
break;
case 7:
cardSTATE = MFEMUL_SELECT2;
break;
case 10:
cardSTATE = MFEMUL_SELECT2;
- EmSendCmd(rSAK2, sizeof(rSAK2));
+ EmSendCmd(rSAK1, sizeof(rSAK1));
break;
default:break;
}
LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
}
+ // select all cl3 - 0x97 0x20
if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 && receivedCmd[1] == 0x20)) {
EmSendCmd(rUIDBCC3, sizeof(rUIDBCC3));
break;
}
+ // select card cl3 - 0x97 0x70
if (len == 9 &&
(receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 &&
receivedCmd[1] == 0x70 &&
memcmp(&receivedCmd[2], rUIDBCC3, 4) == 0) ) {
- EmSendCmd(rSAK2, sizeof(rSAK2));
+ EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
cardSTATE = MFEMUL_WORK;
LED_B_ON();
if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol3 time: %d", GetTickCount() - selTimer);
break;
}
case MFEMUL_AUTH1:{
- if( len != 8)
- {
+ if( len != 8) {
cardSTATE_TO_IDLE();
LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
uint32_t nr = bytes_to_num(receivedCmd, 4);
uint32_t ar = bytes_to_num(&receivedCmd[4], 4);
- //Collect AR/NR per keytype & sector
+ // Collect AR/NR per keytype & sector
if(flags & 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
ar_nr_resp[i+mM].nr = nr;
ar_nr_resp[i+mM].ar = ar;
nonce1_count++;
- //add this nonce to first moebius nonce
+ // add this nonce to first moebius nonce
ar_nr_resp[i+ATTACK_KEY_COUNT].cuid = cuid;
ar_nr_resp[i+ATTACK_KEY_COUNT].sector = cardAUTHSC;
ar_nr_resp[i+ATTACK_KEY_COUNT].keytype = cardAUTHKEY;
ar_nr_resp[i+ATTACK_KEY_COUNT].nr = nr;
ar_nr_resp[i+ATTACK_KEY_COUNT].ar = ar;
ar_nr_collected[i+ATTACK_KEY_COUNT]++;
- } else { //second nonce collect (std and moebius)
+ } else { // second nonce collect (std and moebius)
ar_nr_resp[i+mM].nonce2 = nonce;
ar_nr_resp[i+mM].nr2 = nr;
ar_nr_resp[i+mM].ar2 = ar;
- if (!collectMoebius) {
+ if (!gettingMoebius) {
nonce2_count++;
- //check if this was the last second nonce we need for std attack
+ // check if this was the last second nonce we need for std attack
if ( nonce2_count == nonce1_count ) {
- //done collecting std test switch to moebius
- collectMoebius = true;
+ // done collecting std test switch to moebius
+ // first finish incrementing last sample
+ ar_nr_collected[i+mM]++;
+ // switch to moebius collection
+ gettingMoebius = true;
mM = ATTACK_KEY_COUNT;
- nonce = nonce*7;
+ if (flags & FLAG_RANDOM_NONCE) {
+ nonce = prand();
+ } else {
+ nonce = nonce*7;
+ }
+ break;
}
} else {
moebius_n_count++;
- //if we've collected all the nonces we need - finish.
+ // if we've collected all the nonces we need - finish.
if (nonce1_count == moebius_n_count) finished = true;
}
}
ar_nr_collected[i+mM]++;
- break;
}
- } else { //already collected 2 nonces for sector - reader looping? - quit
- //finished = true;
}
+ // we found right spot for this nonce stop looking
+ break;
}
}
}
-
+
// --- crypto
crypto1_word(pcs, nr , 1);
cardRr = ar ^ crypto1_word(pcs, 0, 0);
if (!len) {
LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
- }
- if (len == 2 && (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x20)) {
+ }
+ // select all cl2 - 0x95 0x20
+ if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
break;
}
- // select 2 card
+ // select cl2 card - 0x95 0x70 xxxxxxxxxxxx
if (len == 9 &&
- (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) {
- //which sak now? (marshmellow)
- EmSendCmd(rSAK, sizeof(rSAK));
+ (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) {
switch(_UID_LEN) {
case 7:
+ EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
cardSTATE = MFEMUL_WORK;
LED_B_ON();
if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
break;
case 10:
+ EmSendCmd(rSAK1, sizeof(rSAK1));
cardSTATE = MFEMUL_SELECT3;
break;
default:break;
}
if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
- if (receivedCmd[1] >= 16 * 4) {
+
+ // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
+ if (receivedCmd[1] >= 16 * 4 && !(flags & FLAG_NR_AR_ATTACK)) {
//is this the correct response to an auth on a out of range block? marshmellow
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
break;
}
}
+ button_pushed = BUTTON_PRESS();
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
- 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);
}
if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
- if(flags & FLAG_INTERACTIVE)// Interactive mode flag, means we need to send ACK
- {
+ if(flags & FLAG_INTERACTIVE) { // Interactive mode flag, means we need to send ACK
//Send the collected ar_nr in the response
- 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,button_pushed,0,&ar_nr_resp,sizeof(ar_nr_resp));
}
-
}
-
//-----------------------------------------------------------------------------
// MIFARE sniffer.
//
projects / proxmark3-svn / blobdiff