X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d5875804a3555b9d6305a4c9dcdbfeac380d9f00..69c4516d32bdd01a5220d7e25dc41b3922a46bb4:/armsrc/iso14443b.c diff --git a/armsrc/iso14443b.c b/armsrc/iso14443b.c index 989b477c..9d033f61 100644 --- a/armsrc/iso14443b.c +++ b/armsrc/iso14443b.c @@ -13,10 +13,14 @@ #include "apps.h" #include "util.h" #include "string.h" - #include "iso14443crc.h" +#include "common.h" +#define RECEIVE_SAMPLES_TIMEOUT 600000 +#define ISO14443B_DMA_BUFFER_SIZE 256 + -#define RECEIVE_SAMPLES_TIMEOUT 2000 +// 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 @@ -122,8 +126,7 @@ static struct { STATE_UNSYNCD, STATE_GOT_FALLING_EDGE_OF_SOF, STATE_AWAITING_START_BIT, - STATE_RECEIVING_DATA, - STATE_ERROR_WAIT + STATE_RECEIVING_DATA } state; uint16_t shiftReg; int bitCnt; @@ -145,7 +148,7 @@ static struct { * Returns: true if we received a EOF * false if we are still waiting for some more */ -static int Handle14443bUartBit(int bit) +static RAMFUNC int Handle14443bUartBit(uint8_t bit) { switch(Uart.state) { case STATE_UNSYNCD: @@ -172,7 +175,7 @@ static int Handle14443bUartBit(int bit) } else { // didn't stay down long enough // before going high, error - Uart.state = STATE_ERROR_WAIT; + Uart.state = STATE_UNSYNCD; } } else { // do nothing, keep waiting @@ -183,7 +186,8 @@ static int Handle14443bUartBit(int bit) if(Uart.bitCnt > 12) { // Give up if we see too many zeros without // a one, too. - Uart.state = STATE_ERROR_WAIT; + LED_A_OFF(); + Uart.state = STATE_UNSYNCD; } break; @@ -193,7 +197,7 @@ static int Handle14443bUartBit(int bit) if(Uart.posCnt > 50/2) { // max 57us between characters = 49 1/fs, max 3 etus after low phase of SOF = 24 1/fs // stayed high for too long between // characters, error - Uart.state = STATE_ERROR_WAIT; + Uart.state = STATE_UNSYNCD; } } else { // falling edge, this starts the data byte @@ -227,37 +231,30 @@ static int Handle14443bUartBit(int bit) if(Uart.byteCnt >= Uart.byteCntMax) { // Buffer overflowed, give up - Uart.posCnt = 0; - Uart.state = STATE_ERROR_WAIT; + LED_A_OFF(); + Uart.state = STATE_UNSYNCD; } else { // so get the next byte now Uart.posCnt = 0; Uart.state = STATE_AWAITING_START_BIT; } - } else if(Uart.shiftReg == 0x000) { + } else if (Uart.shiftReg == 0x000) { // this is an EOF byte LED_A_OFF(); // Finished receiving + Uart.state = STATE_UNSYNCD; + if (Uart.byteCnt != 0) { return TRUE; + } } else { // this is an error - Uart.posCnt = 0; - Uart.state = STATE_ERROR_WAIT; + LED_A_OFF(); + Uart.state = STATE_UNSYNCD; } } break; - case STATE_ERROR_WAIT: - // We're all screwed up, so wait a little while - // for whatever went wrong to finish, and then - // start over. - Uart.posCnt++; - if(Uart.posCnt > 10) { - Uart.state = STATE_UNSYNCD; - LED_A_OFF(); - } - break; - default: + LED_A_OFF(); Uart.state = STATE_UNSYNCD; break; } @@ -265,6 +262,25 @@ static int Handle14443bUartBit(int bit) return FALSE; } + +static void UartReset() +{ + Uart.byteCntMax = MAX_FRAME_SIZE; + Uart.state = STATE_UNSYNCD; + Uart.byteCnt = 0; + Uart.bitCnt = 0; + Uart.posCnt = 0; + memset(Uart.output, 0x00, MAX_FRAME_SIZE); +} + + +static void UartInit(uint8_t *data) +{ + Uart.output = data; + UartReset(); +} + + //----------------------------------------------------------------------------- // Receive a command (from the reader to us, where we are the simulated tag), // and store it in the given buffer, up to the given maximum length. Keeps @@ -274,44 +290,34 @@ static int Handle14443bUartBit(int bit) // Assume that we're called with the SSC (to the FPGA) and ADC path set // correctly. //----------------------------------------------------------------------------- -static int GetIso14443bCommandFromReader(uint8_t *received, int *len, int maxLen) +static int GetIso14443bCommandFromReader(uint8_t *received, uint16_t *len) { - uint8_t mask; - int i, bit; - // Set FPGA mode to "simulated ISO 14443B tag", no modulation (listen // only, since we are receiving, not transmitting). // Signal field is off with the appropriate LED LED_D_OFF(); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); - // Now run a `software UART' on the stream of incoming samples. - Uart.output = received; - Uart.byteCntMax = maxLen; - Uart.state = STATE_UNSYNCD; + UartInit(received); for(;;) { WDT_HIT(); if(BUTTON_PRESS()) return FALSE; - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; - } if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - - mask = 0x80; - for(i = 0; i < 8; i++, mask >>= 1) { - bit = (b & mask); - if(Handle14443bUartBit(bit)) { + for(uint8_t mask = 0x80; mask != 0x00; mask >>= 1) { + if(Handle14443bUartBit(b & mask)) { *len = Uart.byteCnt; return TRUE; } } } } + + return FALSE; } //----------------------------------------------------------------------------- @@ -320,35 +326,54 @@ static int GetIso14443bCommandFromReader(uint8_t *received, int *len, int maxLen //----------------------------------------------------------------------------- void SimulateIso14443bTag(void) { - // the only command we understand is REQB, AFI=0, Select All, N=0: - static const uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 }; - // ... and we respond with ATQB, PUPI = 820de174, Application Data = 0x20381922, + // 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, // supports ISO14443-4, FWI=8 (77ms), NAD supported, CID not supported: static const uint8_t response1[] = { 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}; - uint8_t *resp; - int respLen; + uint8_t parity[MAX_PARITY_SIZE] = {0x00}; + + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + + clear_trace(); + set_tracing(TRUE); + + const uint8_t *resp; + uint8_t *respCode; + uint16_t respLen, respCodeLen; // allocate command receive buffer BigBuf_free(); uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); - int len; - - int i; - - int cmdsRecvd = 0; - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + uint16_t len; + uint16_t cmdsRecvd = 0; // prepare the (only one) tag answer: CodeIso14443bAsTag(response1, sizeof(response1)); - uint8_t *resp1 = BigBuf_malloc(ToSendMax); - memcpy(resp1, ToSend, ToSendMax); - uint16_t resp1Len = ToSendMax; + uint8_t *resp1Code = BigBuf_malloc(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); @@ -357,28 +382,48 @@ void SimulateIso14443bTag(void) cmdsRecvd = 0; for(;;) { - uint8_t b1, b2; - if(!GetIso14443bCommandFromReader(receivedCmd, &len, 100)) { + if (!GetIso14443bCommandFromReader(receivedCmd, &len)) { Dbprintf("button pressed, received %d commands", cmdsRecvd); break; - } + } - // Good, look at the command now. + LogTrace(receivedCmd, len, 0, 0, parity, TRUE); - if(len == sizeof(cmd1) && memcmp(receivedCmd, cmd1, len) == 0) { - resp = resp1; respLen = resp1Len; + // 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; + respLen = sizeof(response1); + 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 - 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"); + uint8_t b1, b2; + 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++; @@ -388,7 +433,7 @@ void SimulateIso14443bTag(void) break; } - if(respLen <= 0) continue; + if(respCodeLen <= 0) continue; // Modulate BPSK // Signal field is off with the appropriate LED @@ -397,25 +442,41 @@ void SimulateIso14443bTag(void) AT91C_BASE_SSC->SSC_THR = 0xff; FpgaSetupSsc(); + uint8_t c; + // clear receiving shift register and holding register + while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); + c = AT91C_BASE_SSC->SSC_RHR; (void) c; + while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); + c = AT91C_BASE_SSC->SSC_RHR; (void) c; + + // Clear TXRDY: + AT91C_BASE_SSC->SSC_THR = 0x00; + // Transmit the response. - i = 0; - for(;;) { + uint16_t FpgaSendQueueDelay = 0; + uint16_t i = 0; + for(;i < respCodeLen; ) { if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - uint8_t b = resp[i]; - - AT91C_BASE_SSC->SSC_THR = b; - - i++; - if(i > respLen) { - break; - } + AT91C_BASE_SSC->SSC_THR = respCode[i++]; + FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR; } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - (void)b; + if(BUTTON_PRESS()) break; + } + + // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again: + uint8_t fpga_queued_bits = FpgaSendQueueDelay >> 3; + for (i = 0; i <= fpga_queued_bits/8 + 1; ) { + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; + FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + i++; } } + + LogTrace(resp, respLen, 0, 0, parity, FALSE); } + FpgaDisableSscDma(); + set_tracing(FALSE); } //============================================================================= @@ -432,8 +493,7 @@ static struct { DEMOD_AWAITING_FALLING_EDGE_OF_SOF, DEMOD_GOT_FALLING_EDGE_OF_SOF, DEMOD_AWAITING_START_BIT, - DEMOD_RECEIVING_DATA, - DEMOD_ERROR_WAIT + DEMOD_RECEIVING_DATA } state; int bitCount; int posCount; @@ -463,9 +523,14 @@ static struct { * false if we are still waiting for some more * */ + #define abs(x) ( ((x)<0) ? -(x) : (x) ) static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) { - int v; + int v = 0; + int ai = abs(ci); + int aq = abs(cq); + int halfci = (ai >> 1); + int halfcq = (aq >> 1); // The soft decision on the bit uses an estimate of just the // quadrant of the reference angle, not the exact angle. @@ -484,50 +549,12 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) #define SUBCARRIER_DETECT_THRESHOLD 8 -// Subcarrier amplitude v = sqrt(ci^2 + cq^2), approximated here by abs(ci) + abs(cq) -/* #define CHECK_FOR_SUBCARRIER() { \ - v = ci; \ - if(v < 0) v = -v; \ - if(cq > 0) { \ - 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))) #define CHECK_FOR_SUBCARRIER() { \ - if(ci < 0) { \ - if(cq < 0) { /* ci < 0, cq < 0 */ \ - if (cq < ci) { \ - v = -cq - (ci >> 1); \ - } else { \ - v = -ci - (cq >> 1); \ - } \ - } else { /* ci < 0, cq >= 0 */ \ - if (cq < -ci) { \ - v = -ci + (cq >> 1); \ - } else { \ - v = cq - (ci >> 1); \ - } \ - } \ - } else { \ - if(cq < 0) { /* ci >= 0, cq < 0 */ \ - if (-cq < ci) { \ - v = ci - (cq >> 1); \ - } else { \ - v = -cq + (ci >> 1); \ - } \ - } else { /* ci >= 0, cq >= 0 */ \ - if (cq < ci) { \ - v = ci + (cq >> 1); \ - } else { \ - v = cq + (ci >> 1); \ - } \ - } \ - } \ - } - + v = MAX(ai, aq) + MIN(halfci, halfcq); \ +} + + switch(Demod.state) { case DEMOD_UNSYNCD: CHECK_FOR_SUBCARRIER(); @@ -536,11 +563,12 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) Demod.sumI = ci; Demod.sumQ = cq; Demod.posCount = 1; - } + } break; case DEMOD_PHASE_REF_TRAINING: if(Demod.posCount < 8) { + //if(Demod.posCount < 10*2) { CHECK_FOR_SUBCARRIER(); if (v > SUBCARRIER_DETECT_THRESHOLD) { // set the reference phase (will code a logic '1') by averaging over 32 1/fs. @@ -558,11 +586,12 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) case DEMOD_AWAITING_FALLING_EDGE_OF_SOF: MAKE_SOFT_DECISION(); - if(v < 0) { // logic '0' detected + //Dbprintf("ICE: %d %d %d %d %d", v, Demod.sumI, Demod.sumQ, ci, cq ); + if(v <= 0) { // logic '0' detected Demod.state = DEMOD_GOT_FALLING_EDGE_OF_SOF; Demod.posCount = 0; // start of SOF sequence } else { - if(Demod.posCount > 200/4) { // maximum length of TR1 = 200 1/fs + if(Demod.posCount > 25*2) { // maximum length of TR1 = 200 1/fs Demod.state = DEMOD_UNSYNCD; } } @@ -573,7 +602,7 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) Demod.posCount++; MAKE_SOFT_DECISION(); if(v > 0) { - if(Demod.posCount < 9*2) { // low phase of SOF too short (< 9 etu). Note: spec is >= 10, but FPGA tends to "smear" edges + if(Demod.posCount < 10*2) { // low phase of SOF too short (< 9 etu). Note: spec is >= 10, but FPGA tends to "smear" edges Demod.state = DEMOD_UNSYNCD; } else { LED_C_ON(); // Got SOF @@ -586,7 +615,7 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) */ } } else { - if(Demod.posCount > 12*2) { // low phase of SOF too long (> 12 etu) + if(Demod.posCount > 13*2) { // low phase of SOF too long (> 12 etu) Demod.state = DEMOD_UNSYNCD; LED_C_OFF(); } @@ -658,7 +687,6 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) LED_C_OFF(); break; } - return FALSE; } @@ -669,6 +697,11 @@ static void DemodReset() Demod.len = 0; Demod.state = DEMOD_UNSYNCD; Demod.posCount = 0; + Demod.sumI = 0; + Demod.sumQ = 0; + Demod.bitCount = 0; + Demod.thisBit = 0; + Demod.shiftReg = 0; memset(Demod.output, 0x00, MAX_FRAME_SIZE); } @@ -680,22 +713,6 @@ static void DemodInit(uint8_t *data) } -static void UartReset() -{ - Uart.byteCntMax = MAX_FRAME_SIZE; - Uart.state = STATE_UNSYNCD; - Uart.byteCnt = 0; - Uart.bitCnt = 0; -} - - -static void UartInit(uint8_t *data) -{ - Uart.output = data; - UartReset(); -} - - /* * Demodulate the samples we received from the tag, also log to tracebuffer * quiet: set to 'TRUE' to disable debug output @@ -709,27 +726,25 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) // Allocate memory from BigBuf for some buffers // free all previous allocations first BigBuf_free(); - + + // And put the FPGA in the appropriate mode + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ); + // The response (tag -> reader) that we're receiving. - uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE); + // Set up the demodulator for tag -> reader responses. + DemodInit(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); - // Set up the demodulator for tag -> reader responses. - DemodInit(receivedResponse); - // Setup and start DMA. FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE); - + int8_t *upTo = dmaBuf; lastRxCounter = ISO14443B_DMA_BUFFER_SIZE; // Signal field is ON with the appropriate LED: LED_D_ON(); - // And put the FPGA in the appropriate mode - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); - for(;;) { int behindBy = lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR; if(behindBy > max) max = behindBy; @@ -745,15 +760,15 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) } lastRxCounter -= 2; if(lastRxCounter <= 0) { - lastRxCounter += ISO14443B_DMA_BUFFER_SIZE; + lastRxCounter = ISO14443B_DMA_BUFFER_SIZE; } samples += 2; - if(Handle14443bSamplesDemod(ci, cq)) { - gotFrame = TRUE; + // + gotFrame = Handle14443bSamplesDemod(ci , cq ); + if ( gotFrame ) break; - } } if(samples > n || gotFrame) { @@ -763,11 +778,20 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; - if (!quiet) Dbprintf("max behindby = %d, samples = %d, gotFrame = %d, Demod.len = %d, Demod.sumI = %d, Demod.sumQ = %d", max, samples, gotFrame, Demod.len, Demod.sumI, Demod.sumQ); + if (!quiet && Demod.len == 0) { + Dbprintf("max behindby = %d, samples = %d, gotFrame = %d, Demod.len = %d, Demod.sumI = %d, Demod.sumQ = %d", + max, + samples, + gotFrame, + Demod.len, + Demod.sumI, + Demod.sumQ + ); + } + //Tracing - if (tracing && Demod.len > 0) { - uint8_t parity[MAX_PARITY_SIZE]; - //GetParity(Demod.output, Demod.len, parity); + if (Demod.len > 0) { + uint8_t parity[MAX_PARITY_SIZE] = {0x00}; LogTrace(Demod.output, Demod.len, 0, 0, parity, FALSE); } } @@ -781,7 +805,7 @@ static void TransmitFor14443b(void) int c; FpgaSetupSsc(); - + while(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = 0xff; } @@ -791,7 +815,7 @@ static void TransmitFor14443b(void) // Signal we are transmitting with the Green LED LED_B_ON(); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD); - + for(c = 0; c < 10;) { if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = 0xff; @@ -839,7 +863,7 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len) ToSendStuffBit(1); } // Send SOF - for(i = 0; i < 10; i++) { + for(i = 0; i < 11; i++) { ToSendStuffBit(0); } @@ -862,7 +886,7 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len) } // Send EOF ToSendStuffBit(1); - for(i = 0; i < 10; i++) { + for(i = 0; i < 11; i++) { ToSendStuffBit(0); } for(i = 0; i < 8; i++) { @@ -871,7 +895,7 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len) // And then a little more, to make sure that the last character makes // it out before we switch to rx mode. - for(i = 0; i < 24; i++) { + for(i = 0; i < 10; i++) { ToSendStuffBit(1); } @@ -880,22 +904,6 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len) } -//----------------------------------------------------------------------------- -// Read an ISO 14443B tag. We send it some set of commands, and record the -// responses. -// The command name is misleading, it actually decodes the reponse in HEX -// into the output buffer (read the result using hexsamples, not hisamples) -// -// obsolete function only for test -//----------------------------------------------------------------------------- -void AcquireRawAdcSamplesIso14443b(uint32_t parameter) -{ - uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 }; // REQB with AFI=0, Request All, N=0 - - SendRawCommand14443B(sizeof(cmd1),1,1,cmd1); -} - - /** Convenience function to encode, transmit and trace iso 14443b comms **/ @@ -905,11 +913,107 @@ static void CodeAndTransmit14443bAsReader(const uint8_t *cmd, int len) TransmitFor14443b(); if (tracing) { uint8_t parity[MAX_PARITY_SIZE]; - GetParity(cmd, len, parity); LogTrace(cmd,len, 0, 0, parity, TRUE); } } +/* 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); + + BigBuf_free(); + // 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); + + //SpinDelay(100); + + // Start the timer + //StartCountSspClk(); + + DemodReset(); + UartReset(); +} //----------------------------------------------------------------------------- // Read a SRI512 ISO 14443B tag. @@ -922,12 +1026,14 @@ static void CodeAndTransmit14443bAsReader(const uint8_t *cmd, int len) //----------------------------------------------------------------------------- void ReadSTMemoryIso14443b(uint32_t dwLast) { + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + BigBuf_free(); + clear_trace(); set_tracing(TRUE); uint8_t i = 0x00; - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); // Make sure that we start from off, since the tags are stateful; // confusing things will happen if we don't reset them between reads. LED_D_OFF(); @@ -940,111 +1046,107 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) // Now give it time to spin up. // Signal field is on with the appropriate LED LED_D_ON(); - FpgaWriteConfWord( - FPGA_MAJOR_MODE_HF_READER_RX_XCORR); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ); SpinDelay(200); // First command: wake up the tag using the INITIATE command uint8_t cmd1[] = {0x06, 0x00, 0x97, 0x5b}; - CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1)); -// LED_A_ON(); GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE); -// LED_A_OFF(); if (Demod.len == 0) { - DbpString("No response from tag"); - return; + DbpString("No response from tag"); + set_tracing(FALSE); + return; } else { - Dbprintf("Randomly generated UID from tag (+ 2 byte CRC): %x %x %x", - Demod.output[0], Demod.output[1], Demod.output[2]); + Dbprintf("Randomly generated Chip ID (+ 2 byte CRC): %02x %02x %02x", + Demod.output[0], Demod.output[1], Demod.output[2]); } + // There is a response, SELECT the uid DbpString("Now SELECT tag:"); cmd1[0] = 0x0E; // 0x0E is SELECT cmd1[1] = Demod.output[0]; ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]); CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1)); - -// LED_A_ON(); GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE); -// LED_A_OFF(); if (Demod.len != 3) { Dbprintf("Expected 3 bytes from tag, got %d", Demod.len); + set_tracing(FALSE); return; } // Check the CRC of the answer: ComputeCrc14443(CRC_14443_B, Demod.output, 1 , &cmd1[2], &cmd1[3]); if(cmd1[2] != Demod.output[1] || cmd1[3] != Demod.output[2]) { DbpString("CRC Error reading select response."); + set_tracing(FALSE); return; } // Check response from the tag: should be the same UID as the command we just sent: if (cmd1[1] != Demod.output[0]) { - Dbprintf("Bad response to SELECT from Tag, aborting: %x %x", cmd1[1], Demod.output[0]); + Dbprintf("Bad response to SELECT from Tag, aborting: %02x %02x", cmd1[1], Demod.output[0]); + set_tracing(FALSE); return; } + // Tag is now selected, // First get the tag's UID: cmd1[0] = 0x0B; ComputeCrc14443(CRC_14443_B, cmd1, 1 , &cmd1[1], &cmd1[2]); CodeAndTransmit14443bAsReader(cmd1, 3); // Only first three bytes for this one - -// LED_A_ON(); GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE); -// LED_A_OFF(); if (Demod.len != 10) { Dbprintf("Expected 10 bytes from tag, got %d", Demod.len); + set_tracing(FALSE); return; } // The check the CRC of the answer (use cmd1 as temporary variable): ComputeCrc14443(CRC_14443_B, Demod.output, 8, &cmd1[2], &cmd1[3]); if(cmd1[2] != Demod.output[8] || cmd1[3] != Demod.output[9]) { - Dbprintf("CRC Error reading block! - Below: expected, got %x %x", - (cmd1[2]<<8)+cmd1[3], (Demod.output[8]<<8)+Demod.output[9]); - // Do not return;, let's go on... (we should retry, maybe ?) + Dbprintf("CRC Error reading block! Expected: %04x got: %04x", + (cmd1[2]<<8)+cmd1[3], (Demod.output[8]<<8)+Demod.output[9]); + // Do not return;, let's go on... (we should retry, maybe ?) } Dbprintf("Tag UID (64 bits): %08x %08x", - (Demod.output[7]<<24) + (Demod.output[6]<<16) + (Demod.output[5]<<8) + Demod.output[4], - (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0]); + (Demod.output[7]<<24) + (Demod.output[6]<<16) + (Demod.output[5]<<8) + Demod.output[4], + (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0]); // Now loop to read all 16 blocks, address from 0 to last block - Dbprintf("Tag memory dump, block 0 to %d",dwLast); + Dbprintf("Tag memory dump, block 0 to %d", dwLast); cmd1[0] = 0x08; i = 0x00; dwLast++; for (;;) { - if (i == dwLast) { + if (i == dwLast) { DbpString("System area block (0xff):"); i = 0xff; } cmd1[1] = i; ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]); CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1)); - -// LED_A_ON(); GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE); -// LED_A_OFF(); if (Demod.len != 6) { // Check if we got an answer from the tag - DbpString("Expected 6 bytes from tag, got less..."); - return; + DbpString("Expected 6 bytes from tag, got less..."); + return; } // The check the CRC of the answer (use cmd1 as temporary variable): ComputeCrc14443(CRC_14443_B, Demod.output, 4, &cmd1[2], &cmd1[3]); - if(cmd1[2] != Demod.output[4] || cmd1[3] != Demod.output[5]) { - Dbprintf("CRC Error reading block! - Below: expected, got %x %x", - (cmd1[2]<<8)+cmd1[3], (Demod.output[4]<<8)+Demod.output[5]); - // Do not return;, let's go on... (we should retry, maybe ?) + if(cmd1[2] != Demod.output[4] || cmd1[3] != Demod.output[5]) { + Dbprintf("CRC Error reading block! Expected: %04x got: %04x", + (cmd1[2]<<8)+cmd1[3], (Demod.output[4]<<8)+Demod.output[5]); + // Do not return;, let's go on... (we should retry, maybe ?) } // Now print out the memory location: - Dbprintf("Address=%x, Contents=%x, CRC=%x", i, - (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0], - (Demod.output[4]<<8)+Demod.output[5]); + Dbprintf("Address=%02x, Contents=%08x, CRC=%04x", i, + (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0], + (Demod.output[4]<<8)+Demod.output[5]); if (i == 0xff) { break; } i++; } + + set_tracing(FALSE); } @@ -1103,7 +1205,7 @@ void RAMFUNC SnoopIso14443b(void) LEDsoff(); // And put the FPGA in the appropriate mode - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_SNOOP); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); // Setup for the DMA. @@ -1111,11 +1213,11 @@ void RAMFUNC SnoopIso14443b(void) upTo = dmaBuf; lastRxCounter = ISO14443B_DMA_BUFFER_SIZE; FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE); - uint8_t parity[MAX_PARITY_SIZE]; + uint8_t parity[MAX_PARITY_SIZE] = {0x00}; bool TagIsActive = FALSE; bool ReaderIsActive = FALSE; - + // And now we loop, receiving samples. for(;;) { int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & @@ -1137,13 +1239,15 @@ void RAMFUNC SnoopIso14443b(void) AT91C_BASE_PDC_SSC->PDC_RNCR = ISO14443B_DMA_BUFFER_SIZE; WDT_HIT(); if(behindBy > (9*ISO14443B_DMA_BUFFER_SIZE/10)) { // TODO: understand whether we can increase/decrease as we want or not? - Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); + Dbprintf("blew circular buffer! behindBy=%d", behindBy); break; } + if(!tracing) { - DbpString("Reached trace limit"); + DbpString("Trace full"); break; } + if(BUTTON_PRESS()) { DbpString("cancelled"); break; @@ -1153,41 +1257,36 @@ void RAMFUNC SnoopIso14443b(void) samples += 2; if (!TagIsActive) { // no need to try decoding reader data if the tag is sending - if(Handle14443bUartBit(ci & 0x01)) { - if(triggered && tracing) { - //GetParity(Uart.output, Uart.byteCnt, parity); + if (Handle14443bUartBit(ci & 0x01)) { + if ( triggered) LogTrace(Uart.output, Uart.byteCnt, samples, samples, parity, TRUE); - } + /* And ready to receive another command. */ UartReset(); /* And also reset the demod code, which might have been */ /* false-triggered by the commands from the reader. */ DemodReset(); } - if(Handle14443bUartBit(cq & 0x01)) { - if(triggered && tracing) { - //GetParity(Uart.output, Uart.byteCnt, parity); + if (Handle14443bUartBit(cq & 0x01)) { + if (triggered) LogTrace(Uart.output, Uart.byteCnt, samples, samples, parity, TRUE); + + /* And ready to receive another command. */ + UartReset(); + /* And also reset the demod code, which might have been */ + /* false-triggered by the commands from the reader. */ + DemodReset(); } - /* And ready to receive another command. */ - UartReset(); - /* And also reset the demod code, which might have been */ - /* false-triggered by the commands from the reader. */ - DemodReset(); - } - ReaderIsActive = (Uart.state != STATE_UNSYNCD); + ReaderIsActive = (Uart.state > STATE_GOT_FALLING_EDGE_OF_SOF); } if(!ReaderIsActive) { // no need to try decoding tag data if the reader is sending - and we cannot afford the time - if(Handle14443bSamplesDemod(ci & 0xFE, cq & 0xFE)) { + // is this | 0x01 the error? & 0xfe in https://github.com/Proxmark/proxmark3/issues/103 + if(Handle14443bSamplesDemod(ci & 0xfe, cq & 0xfe)) { //Use samples as a time measurement - if(tracing) - { - uint8_t parity[MAX_PARITY_SIZE]; - //GetParity(Demod.output, Demod.len, parity); - LogTrace(Demod.output, Demod.len, samples, samples, parity, FALSE); - } + LogTrace(Demod.output, Demod.len, samples, samples, parity, FALSE); + triggered = TRUE; // And ready to receive another response. @@ -1195,11 +1294,11 @@ void RAMFUNC SnoopIso14443b(void) } TagIsActive = (Demod.state > DEMOD_GOT_FALLING_EDGE_OF_SOF); } - } FpgaDisableSscDma(); LEDsoff(); + AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; DbpString("Snoop statistics:"); Dbprintf(" Max behind by: %i", maxBehindBy); @@ -1207,6 +1306,7 @@ void RAMFUNC SnoopIso14443b(void) Dbprintf(" Uart ByteCnt: %i", Uart.byteCnt); Dbprintf(" Uart ByteCntMax: %i", Uart.byteCntMax); Dbprintf(" Trace length: %i", BigBuf_get_traceLen()); + set_tracing(FALSE); } @@ -1224,38 +1324,25 @@ void RAMFUNC SnoopIso14443b(void) */ void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, uint8_t data[]) { - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(); - - set_tracing(TRUE); + iso14443b_setup(); -/* if(!powerfield) { - // Make sure that we start from off, since the tags are stateful; - // confusing things will happen if we don't reset them between reads. - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LED_D_OFF(); - SpinDelay(200); + if ( datalen == 0 && recv == 0 && powerfield == 0){ + + } else { + set_tracing(TRUE); + CodeAndTransmit14443bAsReader(data, datalen); } - */ - // if(!GETBIT(GPIO_LED_D)) { // if field is off - // FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); - // // Signal field is on with the appropriate LED - // LED_D_ON(); - // SpinDelay(200); - // } - - CodeAndTransmit14443bAsReader(data, datalen); - - if(recv) { - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE); + if (recv) { + GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, FALSE); uint16_t iLen = MIN(Demod.len, USB_CMD_DATA_SIZE); cmd_send(CMD_ACK, iLen, 0, 0, Demod.output, iLen); } - if(!powerfield) { + if (!powerfield) { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + FpgaDisableSscDma(); + set_tracing(FALSE); LED_D_OFF(); } }