LEDsoff();
- // We won't start recording the frames that we acquire until we trigger;
- // a good trigger condition to get started is probably when we see a
- // response from the tag.
- // triggered == FALSE -- to wait first for card
- bool triggered = !(param & 0x03);
+
+ iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
// Allocate memory from BigBuf for some buffers
// free all previous allocations first
bool TagIsActive = FALSE;
bool ReaderIsActive = FALSE;
- iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
-
// Set up the demodulator for tag -> reader responses.
DemodInit(receivedResponse, receivedResponsePar);
// Setup and start DMA.
FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+ // We won't start recording the frames that we acquire until we trigger;
+ // a good trigger condition to get started is probably when we see a
+ // response from the tag.
+ // triggered == FALSE -- to wait first for card
+ bool triggered = !(param & 0x03);
+
// And now we loop, receiving samples.
for(uint32_t rsamples = 0; TRUE; ) {
}
/* And ready to receive another command. */
UartReset();
- //UartInit(receivedCmd, receivedCmdPar);
/* And also reset the demod code, which might have been */
/* false-triggered by the commands from the reader. */
DemodReset();
.modulation_n = 0
};
+ // We need to listen to the high-frequency, peak-detected path.
+ iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
BigBuf_free_keep_EM();
// allocate buffers:
int happened2 = 0;
int cmdsRecvd = 0;
- // We need to listen to the high-frequency, peak-detected path.
- iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
cmdsRecvd = 0;
tag_response_info_t* p_response;
FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
}
- if(BUTTON_PRESS()) {
- break;
- }
+ if(BUTTON_PRESS()) break;
}
// Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again:
// Therefore try in alternating directions.
int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
+ uint16_t i;
+ uint32_t nttmp1, nttmp2;
+
if (nt1 == nt2) return 0;
- uint16_t i;
- uint32_t nttmp1 = nt1;
- uint32_t nttmp2 = nt2;
+ nttmp1 = nt1;
+ nttmp2 = nt2;
for (i = 1; i < 32768; i++) {
nttmp1 = prng_successor(nttmp1, 1);
// Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime"
// (article by Nicolas T. Courtois, 2009)
//-----------------------------------------------------------------------------
-void ReaderMifare(bool first_try) {
+void ReaderMifare(bool first_try)
+{
+ // Mifare AUTH
+ uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
+ uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
+ static uint8_t mf_nr_ar3;
+
+ uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
+ uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
+
+ if (first_try) {
+ iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
+ }
+
// free eventually allocated BigBuf memory. We want all for tracing.
BigBuf_free();
clear_trace();
set_tracing(TRUE);
- // Mifare AUTH
- uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
- uint8_t mf_nr_ar[8] = { 0x00 }; //{ 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01 };
- static uint8_t mf_nr_ar3 = 0;
-
- uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = { 0x00 };
- uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = { 0x00 };
-
byte_t nt_diff = 0;
uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough
static byte_t par_low = 0;
bool led_on = TRUE;
- uint8_t uid[10] = {0x00};
- //uint32_t cuid = 0x00;
+ uint8_t uid[10] ={0};
+ uint32_t cuid;
uint32_t nt = 0;
uint32_t previous_nt = 0;
uint16_t consecutive_resyncs = 0;
int isOK = 0;
- int numWrongDistance = 0;
-
if (first_try) {
mf_nr_ar3 = 0;
- iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
sync_time = GetCountSspClk() & 0xfffffff8;
sync_cycles = 65536; // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
nt_attacked = 0;
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
- LED_C_ON();
+
+
+ #define DARKSIDE_MAX_TRIES 32 // number of tries to sync on PRNG cycle. Then give up.
+ uint16_t unsuccessfull_tries = 0;
for(uint16_t i = 0; TRUE; i++) {
+ LED_C_ON();
WDT_HIT();
// Test if the action was cancelled
- if(BUTTON_PRESS()) break;
-
- if (numWrongDistance > 1000) {
- isOK = 0;
+ if(BUTTON_PRESS()) {
+ isOK = -1;
break;
}
- //if(!iso14443a_select_card(uid, NULL, &cuid)) {
- if(!iso14443a_select_card(uid, NULL, NULL)) {
+ if(!iso14443a_select_card(uid, NULL, &cuid)) {
if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card");
continue;
}
nt_attacked = nt;
}
else {
-
- // invalid nonce received, try again
- if (nt_distance == -99999) {
- numWrongDistance++;
- if (MF_DBGLEVEL >= 3) Dbprintf("The two nonces has invalid distance, tag could have good PRNG\n");
- continue;
+ if (nt_distance == -99999) { // invalid nonce received
+ unsuccessfull_tries++;
+ if (!nt_attacked && unsuccessfull_tries > DARKSIDE_MAX_TRIES) {
+ isOK = -3; // Card has an unpredictable PRNG. Give up
+ break;
+ } else {
+ continue; // continue trying...
+ }
}
-
sync_cycles = (sync_cycles - nt_distance);
if (MF_DBGLEVEL >= 3) Dbprintf("calibrating in cycle %d. nt_distance=%d, Sync_cycles: %d\n", i, nt_distance, sync_cycles);
continue;
if ((nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again...
catch_up_cycles = -dist_nt(nt_attacked, nt);
- if (catch_up_cycles >= 99999) { // invalid nonce received. Don't resync on that one.
+ if (catch_up_cycles == 99999) { // invalid nonce received. Don't resync on that one.
catch_up_cycles = 0;
continue;
}
if (nt_diff == 0 && first_try)
{
par[0]++;
+ if (par[0] == 0x00) { // tried all 256 possible parities without success. Card doesn't send NACK.
+ isOK = -2;
+ break;
+ }
} else {
par[0] = ((par[0] & 0x1F) + 1) | par_low;
}
}
}
+
mf_nr_ar[3] &= 0x1F;
byte_t buf[28] = {0x00};
cmd_send(CMD_ACK,isOK,0,0,buf,28);
- set_tracing(FALSE);
+ // Thats it...
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
+
+ set_tracing(FALSE);
}
uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
uint8_t ar_nr_collected = 0;
- // free eventually allocated BigBuf memory but keep Emulator Memory
- BigBuf_free_keep_EM();
-
- // clear trace
- clear_trace();
- set_tracing(TRUE);
-
// Authenticate response - nonce
uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
}
- // We need to listen to the high-frequency, peak-detected path.
- iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
-
if (MF_DBGLEVEL >= 1) {
if (!_7BUID) {
Dbprintf("4B UID: %02x%02x%02x%02x",
}
}
+ // We need to listen to the high-frequency, peak-detected path.
+ iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
+ // free eventually allocated BigBuf memory but keep Emulator Memory
+ BigBuf_free_keep_EM();
+
+ // clear trace
+ clear_trace();
+ set_tracing(TRUE);
+
+
bool finished = FALSE;
while (!BUTTON_PRESS() && !finished) {
WDT_HIT();
// bit 0 - trigger from first card answer
// bit 1 - trigger from first reader 7-bit request
- // free eventually allocated BigBuf memory
- BigBuf_free();
-
// C(red) A(yellow) B(green)
LEDsoff();
// init trace buffer
uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE];
uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE];
+ iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
+
+ // free eventually allocated BigBuf memory
+ BigBuf_free();
// allocate the DMA buffer, used to stream samples from the FPGA
uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
uint8_t *data = dmaBuf;
bool ReaderIsActive = FALSE;
bool TagIsActive = FALSE;
- iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
-
// Set up the demodulator for tag -> reader responses.
DemodInit(receivedResponse, receivedResponsePar);
if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break;
/* And ready to receive another command. */
- //UartInit(receivedCmd, receivedCmdPar);
UartReset();
/* And also reset the demod code */
projects / proxmark3-svn / blobdiff