X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ca8a3478d949a03953129ec34d209a9c80079252..refs/pull/938/head:/armsrc/iso14443b.c?ds=sidebyside diff --git a/armsrc/iso14443b.c b/armsrc/iso14443b.c index 5e770a77..0f36c7c7 100644 --- a/armsrc/iso14443b.c +++ b/armsrc/iso14443b.c @@ -14,12 +14,14 @@ #include "proxmark3.h" #include "apps.h" +#include "usb_cdc.h" #include "util.h" #include "string.h" #include "iso14443crc.h" #include "fpgaloader.h" +#include "BigBuf.h" -#define RECEIVE_SAMPLES_TIMEOUT 1000 // TR0 max is 256/fs = 256/(848kHz) = 302us or 64 samples from FPGA. 1000 seems to be much too high? +#define RECEIVE_SAMPLES_TIMEOUT 64 // TR0 max is 256/fs = 256/(848kHz) = 302us or 64 samples from FPGA #define ISO14443B_DMA_BUFFER_SIZE 128 // PCB Block number for APDUs @@ -585,9 +587,10 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) Demod.state = DEMOD_UNSYNCD; } else { LED_C_ON(); // Got SOF - Demod.state = DEMOD_AWAITING_START_BIT; Demod.posCount = 0; + Demod.bitCount = 0; Demod.len = 0; + Demod.state = DEMOD_AWAITING_START_BIT; /* this had been used to add RSSI (Received Signal Strength Indication) to traces. Currently not implemented. Demod.metricN = 0; Demod.metric = 0; @@ -604,13 +607,16 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) case DEMOD_AWAITING_START_BIT: Demod.posCount++; MAKE_SOFT_DECISION(); - if(v > 0) { - if(Demod.posCount > 3*2) { // max 19us between characters = 16 1/fs, max 3 etu after low phase of SOF = 24 1/fs - Demod.state = DEMOD_UNSYNCD; + if (v > 0) { + if (Demod.posCount > 3*2) { // max 19us between characters = 16 1/fs, max 3 etu after low phase of SOF = 24 1/fs LED_C_OFF(); + if (Demod.bitCount == 0 && Demod.len == 0) { // received SOF only, this is valid for iClass/Picopass + return true; + } else { + Demod.state = DEMOD_UNSYNCD; + } } } else { // start bit detected - Demod.bitCount = 0; Demod.posCount = 1; // this was the first half Demod.thisBit = v; Demod.shiftReg = 0; @@ -620,7 +626,7 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) case DEMOD_RECEIVING_DATA: MAKE_SOFT_DECISION(); - if(Demod.posCount == 0) { // first half of bit + if (Demod.posCount == 0) { // first half of bit Demod.thisBit = v; Demod.posCount = 1; } else { // second half of bit @@ -636,22 +642,23 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq) */ Demod.shiftReg >>= 1; - if(Demod.thisBit > 0) { // logic '1' + if (Demod.thisBit > 0) { // logic '1' Demod.shiftReg |= 0x200; } Demod.bitCount++; - if(Demod.bitCount == 10) { + if (Demod.bitCount == 10) { uint16_t s = Demod.shiftReg; - if((s & 0x200) && !(s & 0x001)) { // stop bit == '1', start bit == '0' + if ((s & 0x200) && !(s & 0x001)) { // stop bit == '1', start bit == '0' uint8_t b = (s >> 1); Demod.output[Demod.len] = b; Demod.len++; + Demod.bitCount = 0; Demod.state = DEMOD_AWAITING_START_BIT; } else { Demod.state = DEMOD_UNSYNCD; LED_C_OFF(); - if(s == 0x000) { + if (s == 0x000) { // This is EOF (start, stop and all data bits == '0' return true; } @@ -692,8 +699,8 @@ static void DemodInit(uint8_t *data) * Demodulate the samples we received from the tag, also log to tracebuffer * quiet: set to 'true' to disable debug output */ -static void GetSamplesFor14443bDemod(int n, bool quiet) -{ +static int GetSamplesFor14443bDemod(int timeout, bool quiet) { + int ret = 0; int maxBehindBy = 0; bool gotFrame = false; int lastRxCounter, samples = 0; @@ -716,7 +723,7 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)) // Setup and start DMA. - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE); uint16_t *upTo = dmaBuf; @@ -725,7 +732,7 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) // 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 | FPGA_HF_READER_RX_XCORR_848_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_848_KHZ | FPGA_HF_READER_MODE_RECEIVE_IQ); for(;;) { int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (ISO14443B_DMA_BUFFER_SIZE-1); @@ -749,12 +756,15 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) } samples++; - if(Handle14443bSamplesDemod(ci, cq)) { + if (Handle14443bSamplesDemod(ci, cq)) { + ret = Demod.len; gotFrame = true; break; } - if(samples > n) { + if(samples > timeout && Demod.state < DEMOD_PHASE_REF_TRAINING) { + ret = -1; + LED_C_OFF(); break; } } @@ -762,10 +772,14 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) FpgaDisableSscDma(); if (!quiet) Dbprintf("max behindby = %d, samples = %d, gotFrame = %d, Demod.len = %d, Demod.sumI = %d, Demod.sumQ = %d", maxBehindBy, samples, gotFrame, Demod.len, Demod.sumI, Demod.sumQ); - //Tracing - if (Demod.len > 0) { - LogTrace(Demod.output, Demod.len, 0, 0, NULL, false); + + if (ret < 0) { + return ret; } + //Tracing + LogTrace(Demod.output, Demod.len, 0, 0, NULL, false); + + return ret; } @@ -774,28 +788,21 @@ static void GetSamplesFor14443bDemod(int n, bool quiet) //----------------------------------------------------------------------------- static void TransmitFor14443b(void) { - int c; - - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX); - - // Signal field is ON with the appropriate Red LED - LED_D_ON(); - // Signal we are transmitting with the Green LED + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD); LED_B_ON(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD); - - c = 0; - for(;;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = ~ToSend[c]; - c++; - if(c >= ToSendMax) { - break; - } + for(int c = 0; c < ToSendMax; c++) { + uint8_t data = ToSend[c]; + for (int i = 0; i < 8; i++) { + uint16_t send_word = (data & 0x80) ? 0x0000 : 0xffff; + while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ; + AT91C_BASE_SSC->SSC_THR = send_word; + while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ; + AT91C_BASE_SSC->SSC_THR = send_word; + data <<= 1; } WDT_HIT(); } - LED_B_OFF(); // Finished sending + LED_B_OFF(); } @@ -863,8 +870,7 @@ 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) -{ +int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *response) { LED_A_ON(); uint8_t message_frame[message_length + 4]; // PCB @@ -879,21 +885,19 @@ int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *respo // send CodeAndTransmit14443bAsReader(message_frame, message_length + 4); // get response - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + int ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); FpgaDisableTracing(); - if(Demod.len < 3) - { + if (ret < 3) { LED_A_OFF(); return 0; } // TODO: Check CRC // copy response contents - if(response != NULL) - { + if (response != NULL) { memcpy(response, Demod.output, Demod.len); } LED_A_OFF(); - return Demod.len; + return ret; } /* Perform the ISO 14443 B Card Selection procedure @@ -912,10 +916,9 @@ int iso14443b_select_card() // first, wake up the tag CodeAndTransmit14443bAsReader(wupb, sizeof(wupb)); - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + int ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); // ATQB too short? - if (Demod.len < 14) - { + if (ret < 14) { return 2; } @@ -927,10 +930,9 @@ int iso14443b_select_card() 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); + ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); // Answer to ATTRIB too short? - if(Demod.len < 3) - { + if (ret < 3) { return 2; } // reset PCB block number @@ -942,13 +944,13 @@ int iso14443b_select_card() void iso14443b_setup() { FpgaDownloadAndGo(FPGA_BITSTREAM_HF); // Set up the synchronous serial port - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); // 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); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD); DemodReset(); UartReset(); @@ -976,12 +978,12 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) SpinDelay(200); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); // 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 | FPGA_HF_READER_RX_XCORR_848_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD); SpinDelay(200); clear_trace(); @@ -990,9 +992,9 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) // First command: wake up the tag using the INITIATE command uint8_t cmd1[] = {0x06, 0x00, 0x97, 0x5b}; CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1)); - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + int ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); - if (Demod.len == 0) { + if (ret < 0) { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); DbpString("No response from tag"); LEDsoff(); @@ -1008,7 +1010,7 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) cmd1[1] = Demod.output[0]; ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]); CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1)); - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); if (Demod.len != 3) { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); Dbprintf("Expected 3 bytes from tag, got %d", Demod.len); @@ -1036,8 +1038,8 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) cmd1[0] = 0x0B; ComputeCrc14443(CRC_14443_B, cmd1, 1 , &cmd1[1], &cmd1[2]); CodeAndTransmit14443bAsReader(cmd1, 3); // Only first three bytes for this one - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); - if (Demod.len != 10) { + ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + if (ret != 10) { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); Dbprintf("Expected 10 bytes from tag, got %d", Demod.len); LEDsoff(); @@ -1067,8 +1069,8 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) cmd1[1] = i; ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]); CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1)); - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); - if (Demod.len != 6) { // Check if we got an answer from the tag + ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + if (ret != 6) { // Check if we got an answer from the tag FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); DbpString("Expected 6 bytes from tag, got less..."); LEDsoff(); @@ -1076,7 +1078,7 @@ void ReadSTMemoryIso14443b(uint32_t dwLast) } // 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]) { + 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 ?) @@ -1143,15 +1145,15 @@ void RAMFUNC SnoopIso14443b(void) Dbprintf(" tag -> Reader: %i bytes", MAX_FRAME_SIZE); Dbprintf(" DMA: %i bytes", ISO14443B_DMA_BUFFER_SIZE); - // Signal field is off, no reader signal, no tag signal - LEDsoff(); + // Signal field is off + LED_D_OFF(); // And put the FPGA in the appropriate mode - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_848_KHZ | FPGA_HF_READER_MODE_SNOOP_IQ); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); // Setup for the DMA. - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); upTo = dmaBuf; lastRxCounter = ISO14443B_DMA_BUFFER_SIZE; FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE); @@ -1218,8 +1220,8 @@ void RAMFUNC SnoopIso14443b(void) ReaderIsActive = (Uart.state > STATE_GOT_FALLING_EDGE_OF_SOF); } - if(!ReaderIsActive && triggered) { // no need to try decoding tag data if the reader is sending or not yet triggered - if(Handle14443bSamplesDemod(ci/2, cq/2)) { + if (!ReaderIsActive && triggered) { // no need to try decoding tag data if the reader is sending or not yet triggered + if (Handle14443bSamplesDemod(ci/2, cq/2) >= 0) { //Use samples as a time measurement LogTrace(Demod.output, Demod.len, samples, samples, NULL, false); // And ready to receive another response. @@ -1255,12 +1257,14 @@ void RAMFUNC SnoopIso14443b(void) */ void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, uint8_t data[]) { + LED_A_ON(); FpgaDownloadAndGo(FPGA_BITSTREAM_HF); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); // switch field on and give tag some time to power up LED_D_ON(); - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); SpinDelay(10); if (datalen){ @@ -1268,19 +1272,21 @@ void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, u CodeAndTransmit14443bAsReader(data, datalen); - if(recv) { - GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true); + if (recv) { + int ret = GetSamplesFor14443bDemod(5*RECEIVE_SAMPLES_TIMEOUT, true); FpgaDisableTracing(); uint16_t iLen = MIN(Demod.len, USB_CMD_DATA_SIZE); - cmd_send(CMD_ACK, iLen, 0, 0, Demod.output, iLen); + cmd_send(CMD_ACK, ret, 0, 0, Demod.output, iLen); } FpgaDisableTracing(); } - if(!powerfield) { + if (!powerfield) { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_D_OFF(); } + + LED_A_OFF(); }