} tUart;
static uint32_t iso14a_timeout;
+#define MAX_ISO14A_TIMEOUT 524288
+
int rsamples = 0;
uint8_t trigger = 0;
// the block number for the ISO14443-4 PCB
void iso14a_set_timeout(uint32_t timeout) {
- iso14a_timeout = timeout;
- if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", iso14a_timeout, iso14a_timeout / 106);
+ // adjust timeout by FPGA delays and 2 additional ssp_frames to detect SOF
+ iso14a_timeout = timeout + (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/(16*8) + 2;
+ if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", timeout, timeout / 106);
}
-static void iso14a_set_ATS_timeout(uint8_t *ats) {
-
- uint8_t tb1;
- uint8_t fwi;
- uint32_t fwt;
-
- if (ats[0] > 1) { // there is a format byte T0
- if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1)
- if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1)
- tb1 = ats[3];
- } else {
- tb1 = ats[2];
- }
- fwi = (tb1 & 0xf0) >> 4; // frame waiting indicator (FWI)
- fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc
-
- iso14a_set_timeout(fwt/(8*16));
- }
- }
+uint32_t iso14a_get_timeout(void) {
+ return iso14a_timeout - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/(16*8) - 2;
}
-
//-----------------------------------------------------------------------------
// Generate the parity value for a byte sequence
//
// Transmit the command (to the tag) that was placed in ToSend[].
// Parameter timing:
// if NULL: transfer at next possible time, taking into account
-// request guard time and frame delay time
+// request guard time, startup frame guard time and frame delay time
// if == 0: transfer immediately and return time of transfer
// if != 0: delay transfer until time specified
//-------------------------------------------------------------------------------------
return Demod.len;
}
+
+static void iso14a_set_ATS_times(uint8_t *ats) {
+
+ uint8_t tb1;
+ uint8_t fwi, sfgi;
+ uint32_t fwt, sfgt;
+
+ if (ats[0] > 1) { // there is a format byte T0
+ if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1)
+ if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1)
+ tb1 = ats[3];
+ } else {
+ tb1 = ats[2];
+ }
+ fwi = (tb1 & 0xf0) >> 4; // frame waiting time integer (FWI)
+ if (fwi != 15) {
+ fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc
+ iso14a_set_timeout(fwt/(8*16));
+ }
+ sfgi = tb1 & 0x0f; // startup frame guard time integer (SFGI)
+ if (sfgi != 0 && sfgi != 15) {
+ sfgt = 256 * 16 * (1 << sfgi); // startup frame guard time (SFGT) in 1/fc
+ NextTransferTime = MAX(NextTransferTime, Demod.endTime + (sfgt - DELAY_AIR2ARM_AS_READER - DELAY_ARM2AIR_AS_READER)/16);
+ }
+ }
+ }
+}
+
+
+static int GetATQA(uint8_t *resp, uint8_t *resp_par) {
+
+#define WUPA_RETRY_TIMEOUT 10 // 10ms
+ uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP
+
+ uint32_t save_iso14a_timeout = iso14a_get_timeout();
+ iso14a_set_timeout(1236/(16*8)+1); // response to WUPA is expected at exactly 1236/fc. No need to wait longer.
+
+ uint32_t start_time = GetTickCount();
+ int len;
+
+ // we may need several tries if we did send an unknown command or a wrong authentication before...
+ do {
+ // Broadcast for a card, WUPA (0x52) will force response from all cards in the field
+ ReaderTransmitBitsPar(wupa, 7, NULL, NULL);
+ // Receive the ATQA
+ len = ReaderReceive(resp, resp_par);
+ } while (len == 0 && GetTickCount() <= start_time + WUPA_RETRY_TIMEOUT);
+
+ iso14a_set_timeout(save_iso14a_timeout);
+ return len;
+}
+
+
// performs iso14443a anticollision (optional) and card select procedure
// fills the uid and cuid pointer unless NULL
// fills the card info record unless NULL
// and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
// requests ATS unless no_rats is true
int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) {
- uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP
uint8_t sel_all[] = { 0x93,0x20 };
uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
p_hi14a_card->ats_len = 0;
}
- // Broadcast for a card, WUPA (0x52) will force response from all cards in the field
- ReaderTransmitBitsPar(wupa, 7, NULL, NULL);
-
- // Receive the ATQA
- if(!ReaderReceive(resp, resp_par)) return 0;
+ if (!GetATQA(resp, resp_par)) {
+ return 0;
+ }
if(p_hi14a_card) {
memcpy(p_hi14a_card->atqa, resp, 2);
// reset the PCB block number
iso14_pcb_blocknum = 0;
- // set default timeout based on ATS
- iso14a_set_ATS_timeout(resp);
+ // set default timeout and delay next transfer based on ATS
+ iso14a_set_ATS_times(resp);
+
}
return 1;
}
iso14a_set_timeout(1060); // 10ms default
}
-
+/* Peter Fillmore 2015
+Added card id field to the function
+ info from ISO14443A standard
+b1 = Block Number
+b2 = RFU (always 1)
+b3 = depends on block
+b4 = Card ID following if set to 1
+b5 = depends on block type
+b6 = depends on block type
+b7,b8 = block type.
+Coding of I-BLOCK:
+b8 b7 b6 b5 b4 b3 b2 b1
+0 0 0 x x x 1 x
+b5 = chaining bit
+Coding of R-block:
+b8 b7 b6 b5 b4 b3 b2 b1
+1 0 1 x x 0 1 x
+b5 = ACK/NACK
+Coding of S-block:
+b8 b7 b6 b5 b4 b3 b2 b1
+1 1 x x x 0 1 0
+b5,b6 = 00 - DESELECT
+ 11 - WTX
+*/
int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
uint8_t parity[MAX_PARITY_SIZE];
uint8_t real_cmd[cmd_len + 4];
if (!len) {
return 0; //DATA LINK ERROR
-
- // if we received an I- or R(ACK)-Block with a block number equal to the
- // current block number, toggle the current block number
} else{
+ // S-Block WTX
+ while((data_bytes[0] & 0xF2) == 0xF2) {
+ uint32_t save_iso14a_timeout = iso14a_get_timeout();
+ // temporarily increase timeout
+ iso14a_set_timeout(MAX((data_bytes[1] & 0x3f) * save_iso14a_timeout, MAX_ISO14A_TIMEOUT));
+ // Transmit WTX back
+ // byte1 - WTXM [1..59]. command FWT=FWT*WTXM
+ data_bytes[1] = data_bytes[1] & 0x3f; // 2 high bits mandatory set to 0b
+ // now need to fix CRC.
+ AppendCrc14443a(data_bytes, len - 2);
+ // transmit S-Block
+ ReaderTransmit(data_bytes, len, NULL);
+ // retrieve the result again (with increased timeout)
+ len = ReaderReceive(data, parity);
+ data_bytes = data;
+ // restore timeout
+ iso14a_set_timeout(save_iso14a_timeout);
+ }
+
+ // if we received an I- or R(ACK)-Block with a block number equal to the
+ // current block number, toggle the current block number
if (len >= 3 // PCB+CRC = 3 bytes
&& ((data_bytes[0] & 0xC0) == 0 // I-Block
|| (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
projects / proxmark3-svn / blobdiff