git.zerfleddert.de Git - proxmark3-svn/blobdiff

index 33c047d8113c84aa2408c5d2eb01bf5cd1563499..22227e74bec96651d5c2620dd37f4bea210f27d2 100644 (file)

--- a/armsrc/iso14443b.c

+++ b/armsrc/iso14443b.c

@@ -19,6 +19,9 @@

#define RECEIVE_SAMPLES_TIMEOUT 2000

#define ISO14443B_DMA_BUFFER_SIZE 256

#define RECEIVE_SAMPLES_TIMEOUT 2000

#define ISO14443B_DMA_BUFFER_SIZE 256

+// PCB Block number for APDUs

+static uint8_t pcb_blocknum = 0;

//=============================================================================

// An ISO 14443 Type B tag. We listen for commands from the reader, using

// a UART kind of thing that's implemented in software. When we get a

//=============================================================================

// An ISO 14443 Type B tag. We listen for commands from the reader, using

// a UART kind of thing that's implemented in software. When we get a

@@ -311,7 +314,7 @@ static int GetIso14443bCommandFromReader(uint8_t *received, uint16_t *len)

}

return FALSE;

}

return FALSE;

}

@@ -321,10 +324,14 @@ static int GetIso14443bCommandFromReader(uint8_t *received, uint16_t *len)

//-----------------------------------------------------------------------------

void SimulateIso14443bTag(void)

{

//-----------------------------------------------------------------------------

void SimulateIso14443bTag(void)

{

- // the only commands we understand is REQB, AFI=0, Select All, N=0:

- static const uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };

- // ... and REQB, AFI=0, Normal Request, N=0:

- static const uint8_t cmd2[] = { 0x05, 0x00, 0x00, 0x71, 0xFF };

+ // the only commands we understand is WUPB, AFI=0, Select All, N=1:

+ static const uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 }; // WUPB

+ // ... and REQB, AFI=0, Normal Request, N=1:

+ static const uint8_t cmd2[] = { 0x05, 0x00, 0x00, 0x71, 0xFF }; // REQB

+ // ... and HLTB

+ static const uint8_t cmd3[] = { 0x50, 0xff, 0xff, 0xff, 0xff }; // HLTB

+ // ... and ATTRIB

+ static const uint8_t cmd4[] = { 0x1D, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; // ATTRIB

// ... and we always respond with ATQB, PUPI = 820de174, Application Data = 0x20381922,

// supports only 106kBit/s in both directions, max frame size = 32Bytes,

// ... and we always respond with ATQB, PUPI = 820de174, Application Data = 0x20381922,

// supports only 106kBit/s in both directions, max frame size = 32Bytes,

@@ -333,6 +340,9 @@ void SimulateIso14443bTag(void)

0x50, 0x82, 0x0d, 0xe1, 0x74, 0x20, 0x38, 0x19, 0x22,

0x00, 0x21, 0x85, 0x5e, 0xd7

};

0x50, 0x82, 0x0d, 0xe1, 0x74, 0x20, 0x38, 0x19, 0x22,

0x00, 0x21, 0x85, 0x5e, 0xd7

};

+ // response to HLTB and ATTRIB

+ static const uint8_t response2[] = {0x00, 0x78, 0xF0};

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

@@ -353,9 +363,15 @@ void SimulateIso14443bTag(void)

// prepare the (only one) tag answer:

CodeIso14443bAsTag(response1, sizeof(response1));

uint8_t *resp1Code = BigBuf_malloc(ToSendMax);

// prepare the (only one) tag answer:

CodeIso14443bAsTag(response1, sizeof(response1));

uint8_t *resp1Code = BigBuf_malloc(ToSendMax);

- memcpy(resp1Code, ToSend, ToSendMax);

+ memcpy(resp1Code, ToSend, ToSendMax);

uint16_t resp1CodeLen = ToSendMax;

+ // prepare the (other) tag answer:

+ CodeIso14443bAsTag(response2, sizeof(response2));

+ uint8_t *resp2Code = BigBuf_malloc(ToSendMax);

+ memcpy(resp2Code, ToSend, ToSendMax);

+ uint16_t resp2CodeLen = ToSendMax;

// We need to listen to the high-frequency, peak-detected path.

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

FpgaSetupSsc();

// We need to listen to the high-frequency, peak-detected path.

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

FpgaSetupSsc();

@@ -377,22 +393,37 @@ void SimulateIso14443bTag(void)

// Good, look at the command now.

if ( (len == sizeof(cmd1) && memcmp(receivedCmd, cmd1, len) == 0)

|| (len == sizeof(cmd2) && memcmp(receivedCmd, cmd2, len) == 0) ) {

// Good, look at the command now.

if ( (len == sizeof(cmd1) && memcmp(receivedCmd, cmd1, len) == 0)

|| (len == sizeof(cmd2) && memcmp(receivedCmd, cmd2, len) == 0) ) {

- resp = response1;

+ resp = response1;

respLen = sizeof(response1);

- respCode = resp1Code;

+ respCode = resp1Code;

respCodeLen = resp1CodeLen;

+ } else if ( (len == sizeof(cmd3) && receivedCmd[0] == cmd3[0])

+ || (len == sizeof(cmd4) && receivedCmd[0] == cmd4[0]) ) {

+ resp = response2;

+ respLen = sizeof(response2);

+ respCode = resp2Code;

+ respCodeLen = resp2CodeLen;

} else {

Dbprintf("new cmd from reader: len=%d, cmdsRecvd=%d", len, cmdsRecvd);

// And print whether the CRC fails, just for good measure

uint8_t b1, b2;

} else {

Dbprintf("new cmd from reader: len=%d, cmdsRecvd=%d", len, cmdsRecvd);

// And print whether the CRC fails, just for good measure

uint8_t b1, b2;

- ComputeCrc14443(CRC_14443_B, receivedCmd, len-2, &b1, &b2);

- if(b1 != receivedCmd[len-2] || b2 != receivedCmd[len-1]) {

- // Not so good, try again.

- DbpString("+++CRC fail");

- } else {

- DbpString("CRC passes");

+ if (len >= 3){ // if crc exists

+ ComputeCrc14443(CRC_14443_B, receivedCmd, len-2, &b1, &b2);

+ if(b1 != receivedCmd[len-2] || b2 != receivedCmd[len-1]) {

+ // Not so good, try again.

+ DbpString("+++CRC fail");

+ } else {

+ DbpString("CRC passes");

+ }

}

- break;

+ //get rid of compiler warning

+ respCodeLen = 0;

+ resp = response1;

+ respLen = 0;

+ respCode = resp1Code;

+ //don't crash at new command just wait and see if reader will send other new cmds.

+ //break;

}

cmdsRecvd++;

}

cmdsRecvd++;

@@ -429,13 +460,13 @@ void SimulateIso14443bTag(void)

(void)b;

}

(void)b;

}

// trace the response:

if (tracing) {

uint8_t parity[MAX_PARITY_SIZE];

LogTrace(resp, respLen, 0, 0, parity, FALSE);

}

// trace the response:

if (tracing) {

uint8_t parity[MAX_PARITY_SIZE];

LogTrace(resp, respLen, 0, 0, parity, FALSE);

}

@@ -513,18 +544,23 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

} else { \

v -= cq; \

} \

} else { \

v -= cq; \

} \

- }

+ }

// Subcarrier amplitude v = sqrt(ci^2 + cq^2), approximated here by max(abs(ci),abs(cq)) + 1/2*min(abs(ci),abs(cq)))

+ //note: couldn't we just use MAX(ABS(ci),ABS(cq)) + (MIN(ABS(ci),ABS(cq))/2) from common.h - marshmellow

#define CHECK_FOR_SUBCARRIER() { \

+ v = MAX(ABS(ci),ABS(cq)) + (MIN(ABS(ci),ABS(cq))/2); \

+ }

+ /*

if(ci < 0) { \

- if(cq < 0) { /* ci < 0, cq < 0 */ \

+ if(cq < 0) { \ // ci < 0, cq < 0

if (cq < ci) { \

v = -cq - (ci >> 1); \

} else { \

v = -ci - (cq >> 1); \

} \

if (cq < ci) { \

v = -cq - (ci >> 1); \

} else { \

v = -ci - (cq >> 1); \

} \

- } else { /* ci < 0, cq >= 0 */ \

+ } else { \ // ci < 0, cq >= 0

if (cq < -ci) { \

v = -ci + (cq >> 1); \

} else { \

if (cq < -ci) { \

v = -ci + (cq >> 1); \

} else { \

@@ -532,13 +568,13 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

} \

} else { \

} \

} else { \

- if(cq < 0) { /* ci >= 0, cq < 0 */ \

+ if(cq < 0) { \ // ci >= 0, cq < 0

if (-cq < ci) { \

v = ci - (cq >> 1); \

} else { \

v = -cq + (ci >> 1); \

} \

if (-cq < ci) { \

v = ci - (cq >> 1); \

} else { \

v = -cq + (ci >> 1); \

} \

- } else { /* ci >= 0, cq >= 0 */ \

+ } else { \ // ci >= 0, cq >= 0

if (cq < ci) { \

v = ci + (cq >> 1); \

} else { \

if (cq < ci) { \

v = ci + (cq >> 1); \

} else { \

@@ -547,7 +583,8 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

} \

}

} \

}

+ */

switch(Demod.state) {

case DEMOD_UNSYNCD:

CHECK_FOR_SUBCARRIER();

switch(Demod.state) {

case DEMOD_UNSYNCD:

CHECK_FOR_SUBCARRIER();

@@ -645,7 +682,7 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

Demod.metric -= Demod.thisBit;

}

(Demod.metricN)++;

Demod.metric -= Demod.thisBit;

}

(Demod.metricN)++;

-*/

+*/

Demod.shiftReg >>= 1;

if(Demod.thisBit > 0) { // logic '1'

Demod.shiftReg >>= 1;

if(Demod.thisBit > 0) { // logic '1'

@@ -713,10 +750,10 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)

// Allocate memory from BigBuf for some buffers

// free all previous allocations first

BigBuf_free();

// Allocate memory from BigBuf for some buffers

// free all previous allocations first

BigBuf_free();

// The response (tag -> reader) that we're receiving.

uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE);

// The response (tag -> reader) that we're receiving.

uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE);

// The DMA buffer, used to stream samples from the FPGA

int8_t *dmaBuf = (int8_t*) BigBuf_malloc(ISO14443B_DMA_BUFFER_SIZE);

// The DMA buffer, used to stream samples from the FPGA

int8_t *dmaBuf = (int8_t*) BigBuf_malloc(ISO14443B_DMA_BUFFER_SIZE);

@@ -896,6 +933,98 @@ static void CodeAndTransmit14443bAsReader(const uint8_t *cmd, int len)

}

+/* Sends an APDU to the tag

+ * TODO: check CRC and preamble

+ */

+int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *response)

+ uint8_t message_frame[message_length + 4];

+ // PCB

+ message_frame[0] = 0x0A | pcb_blocknum;

+ pcb_blocknum ^= 1;

+ // CID

+ message_frame[1] = 0;

+ // INF

+ memcpy(message_frame + 2, message, message_length);

+ // EDC (CRC)

+ ComputeCrc14443(CRC_14443_B, message_frame, message_length + 2, &message_frame[message_length + 2], &message_frame[message_length + 3]);

+ // send

+ CodeAndTransmit14443bAsReader(message_frame, message_length + 4);

+ // get response

+ GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT*100, TRUE);

+ if(Demod.len < 3)

+ {

+ return 0;

+ }

+ // TODO: Check CRC

+ // copy response contents

+ if(response != NULL)

+ {

+ memcpy(response, Demod.output, Demod.len);

+ }

+ return Demod.len;

+/* Perform the ISO 14443 B Card Selection procedure

+ * Currently does NOT do any collision handling.

+ * It expects 0-1 cards in the device's range.

+ * TODO: Support multiple cards (perform anticollision)

+ * TODO: Verify CRC checksums

+ */

+int iso14443b_select_card()

+ // WUPB command (including CRC)

+ // Note: WUPB wakes up all tags, REQB doesn't wake up tags in HALT state

+ static const uint8_t wupb[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };

+ // ATTRIB command (with space for CRC)

+ uint8_t attrib[] = { 0x1D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00};

+ // first, wake up the tag

+ CodeAndTransmit14443bAsReader(wupb, sizeof(wupb));

+ GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);

+ // ATQB too short?

+ if (Demod.len < 14)

+ {

+ return 2;

+ }

+ // select the tag

+ // copy the PUPI to ATTRIB

+ memcpy(attrib + 1, Demod.output + 1, 4);

+ /* copy the protocol info from ATQB (Protocol Info -> Protocol_Type) into

+ ATTRIB (Param 3) */

+ attrib[7] = Demod.output[10] & 0x0F;

+ ComputeCrc14443(CRC_14443_B, attrib, 9, attrib + 9, attrib + 10);

+ CodeAndTransmit14443bAsReader(attrib, sizeof(attrib));

+ GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);

+ // Answer to ATTRIB too short?

+ if(Demod.len < 3)

+ {

+ return 2;

+ }

+ // reset PCB block number

+ pcb_blocknum = 0;

+ return 1;

+// Set up ISO 14443 Type B communication (similar to iso14443a_setup)

+void iso14443b_setup() {

+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

+ // Set up the synchronous serial port

+ FpgaSetupSsc();

+ // connect Demodulated Signal to ADC:

+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

+ // Signal field is on with the appropriate LED

+ LED_D_ON();

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD);

+ // Start the timer

+ StartCountSspClk();

+ DemodReset();

+ UartReset();

//-----------------------------------------------------------------------------

// Read a SRI512 ISO 14443B tag.

//-----------------------------------------------------------------------------

// Read a SRI512 ISO 14443B tag.

@@ -1090,7 +1219,7 @@ void RAMFUNC SnoopIso14443b(void)

bool TagIsActive = FALSE;

bool ReaderIsActive = FALSE;

bool TagIsActive = FALSE;

bool ReaderIsActive = FALSE;

// And now we loop, receiving samples.

for(;;) {

int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &

// And now we loop, receiving samples.

for(;;) {

int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &

@@ -1200,16 +1329,18 @@ void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, u

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

FpgaSetupSsc();

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

FpgaSetupSsc();

- set_tracing(TRUE);

- CodeAndTransmit14443bAsReader(data, datalen);

+ if (datalen){

+ set_tracing(TRUE);

+ CodeAndTransmit14443bAsReader(data, datalen);

- if(recv) {

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);

- uint16_t iLen = MIN(Demod.len, USB_CMD_DATA_SIZE);

- cmd_send(CMD_ACK, iLen, 0, 0, Demod.output, iLen);

+ if(recv) {

+ GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);

+ uint16_t iLen = MIN(Demod.len, USB_CMD_DATA_SIZE);

+ cmd_send(CMD_ACK, iLen, 0, 0, Demod.output, iLen);

+ }

}

if(!powerfield) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

LED_D_OFF();

if(!powerfield) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

LED_D_OFF();