From 3d2c9c9b066c5a0b6a8dab467d86561223ddac10 Mon Sep 17 00:00:00 2001 From: pwpiwi Date: Mon, 2 Sep 2019 11:10:45 +0200 Subject: [PATCH] fix 'hf iclass sim' * fix debug print on unhandled commands * deduplicate: use sim functions from iso15693.c * fix times in tracelog and 'hf list iclass' (sim only) * don't check parity in 'hf list iclass' * fix timing in TransmitTo15693Reader() --- armsrc/iclass.c | 254 ++++++----------------------------------- armsrc/iso15693.c | 199 ++++++++++++++++++-------------- armsrc/iso15693.h | 20 +++- client/cmdhflist.c | 52 +++++---- common/iso15693tools.h | 6 +- 5 files changed, 204 insertions(+), 327 deletions(-) diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 23d407f7..daa44256 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -42,9 +42,11 @@ #include "apps.h" #include "util.h" #include "string.h" +#include "printf.h" #include "common.h" #include "cmd.h" #include "iso14443a.h" +#include "iso15693.h" // Needed for CRC in emulation mode; // same construction as in ISO 14443; // different initial value (CRC_ICLASS) @@ -754,132 +756,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { } } -//----------------------------------------------------------------------------- -// Wait for commands from reader -// Stop when button is pressed -// Or return true when command is captured -//----------------------------------------------------------------------------- -static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen) { - // Set FPGA mode to "simulated ISO 14443 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_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - - // Now run a `software UART' on the stream of incoming samples. - Uart.output = received; - Uart.byteCntMax = maxLen; - Uart.state = STATE_UNSYNCD; - - 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; - - if (OutOfNDecoding(b & 0x0f)) { - *len = Uart.byteCnt; - return true; - } - } - } -} - -static uint8_t encode4Bits(const uint8_t b) { - uint8_t c = b & 0xF; - // OTA, the least significant bits first - // The columns are - // 1 - Bit value to send - // 2 - Reversed (big-endian) - // 3 - Manchester Encoded - // 4 - Hex values - - switch(c){ - // 1 2 3 4 - case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55 - case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95 - case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65 - case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5 - case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59 - case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99 - case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69 - case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9 - case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56 - case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96 - case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66 - case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6 - case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a - case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a - case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a - default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa - - } -} - -//----------------------------------------------------------------------------- -// Prepare tag messages -//----------------------------------------------------------------------------- -static void CodeIClassTagAnswer(const uint8_t *cmd, int len) { - - /* - * SOF comprises 3 parts; - * * An unmodulated time of 56.64 us - * * 24 pulses of 423.75 kHz (fc/32) - * * A logic 1, which starts with an unmodulated time of 18.88us - * followed by 8 pulses of 423.75kHz (fc/32) - * - * - * EOF comprises 3 parts: - * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated - * time of 18.88us. - * - 24 pulses of fc/32 - * - An unmodulated time of 56.64 us - * - * - * A logic 0 starts with 8 pulses of fc/32 - * followed by an unmodulated time of 256/fc (~18,88us). - * - * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by - * 8 pulses of fc/32 (also 18.88us) - * - * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag, - * works like this. - * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us). - * - A 0-bit input to the FPGA becomes an unmodulated time of 18.88us - * - * In this mode the SOF can be written as 00011101 = 0x1D - * The EOF can be written as 10111000 = 0xb8 - * A logic 1 is 01 - * A logic 0 is 10 - * - * */ - - int i; - - ToSendReset(); - - // Send SOF - ToSend[++ToSendMax] = 0x1D; - - for (i = 0; i < len; i++) { - uint8_t b = cmd[i]; - ToSend[++ToSendMax] = encode4Bits(b & 0xF); // Least significant half - ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF); // Most significant half - } - - // Send EOF - ToSend[++ToSendMax] = 0xB8; - //lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end - // Convert from last byte pos to length - ToSendMax++; -} - -// Only SOF +// Encode SOF only static void CodeIClassTagSOF() { //So far a dummy implementation, not used //int lastProxToAirDuration =0; @@ -897,43 +774,6 @@ static void AppendCrc(uint8_t *data, int len) { ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1); } -static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) { - int i = 0, d = 0;//, u = 0, d = 0; - uint8_t b = 0; - - //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K_8BIT); - - AT91C_BASE_SSC->SSC_THR = 0x00; - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); - while (true) { - if ((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){ - b = AT91C_BASE_SSC->SSC_RHR; - (void) b; - } - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){ - b = 0x00; - if (d < delay) { - // send 0x00 byte (causing a 2048/13,56MHz = 151us delay) - d++; - } else { - if (i < respLen) { - b = resp[i]; - } - i++; - } - AT91C_BASE_SSC->SSC_THR = b; - } - -// if (i > respLen +4) break; - if (i > respLen + 1) break; - // send 2 more 0x00 bytes (causing a 302us delay) - } - - return 0; -} - - /** * @brief Does the actual simulation @@ -1032,33 +872,33 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // Prepare card messages ToSendMax = 0; - // First card answer: SOF + // First card answer: SOF only CodeIClassTagSOF(); memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax; // Anticollision CSN - CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data)); + CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data)); memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax; // CSN (block 0) - CodeIClassTagAnswer(csn_data, sizeof(csn_data)); + CodeIso15693AsTag(csn_data, sizeof(csn_data)); memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax; // Configuration (block 1) - CodeIClassTagAnswer(conf_data, sizeof(conf_data)); + CodeIso15693AsTag(conf_data, sizeof(conf_data)); memcpy(resp_conf, ToSend, ToSendMax); resp_conf_len = ToSendMax; // e-Purse (block 2) - CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data)); + CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax; // Application Issuer Area (block 5) - CodeIClassTagAnswer(aia_data, sizeof(aia_data)); + CodeIso15693AsTag(aia_data, sizeof(aia_data)); memcpy(resp_aia, ToSend, ToSendMax); resp_aia_len = ToSendMax; @@ -1066,33 +906,22 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { uint8_t *data_generic_trace = BigBuf_malloc(8 + 2); // 8 bytes data + 2byte CRC is max tag answer uint8_t *data_response = BigBuf_malloc( (8 + 2) * 2 + 2); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - SpinDelay(100); - StartCountSspClk(); - // We need to listen to the high-frequency, peak-detected path. - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); - - uint32_t time_0 = GetCountSspClk(); - uint32_t t2r_time =0; - uint32_t r2t_time =0; - LED_A_ON(); bool buttonPressed = false; - uint8_t response_delay = 1; while (!exitLoop) { WDT_HIT(); - response_delay = 1; LED_B_OFF(); //Signal tracer // Can be used to get a trigger for an oscilloscope.. LED_C_OFF(); - if (!GetIClassCommandFromReader(receivedCmd, &len, 100)) { + uint32_t reader_eof_time = 0; + len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time); + if (len < 0) { buttonPressed = true; break; } - r2t_time = GetCountSspClk(); + //Signal tracer LED_C_ON(); @@ -1116,7 +945,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { trace_data = anticoll_data; trace_data_size = sizeof(anticoll_data); //DbpString("Reader requests anticollission CSN:"); - + } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block uint16_t blockNo = receivedCmd[1]; if (simulationMode != ICLASS_SIM_MODE_FULL) { @@ -1157,7 +986,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { AppendCrc(data_generic_trace, 8); trace_data = data_generic_trace; trace_data_size = 10; - CodeIClassTagAnswer(trace_data, trace_data_size); + CodeIso15693AsTag(trace_data, trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; @@ -1183,26 +1012,18 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (receivedCmd[0] == ICLASS_CMD_CHECK) { // Reader random and reader MAC!!! if (simulationMode == ICLASS_SIM_MODE_FULL) { - //NR, from reader, is in receivedCmd +1 + //NR, from reader, is in receivedCmd+1 opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key); trace_data = data_generic_trace; trace_data_size = 4; - CodeIClassTagAnswer(trace_data, trace_data_size); + CodeIso15693AsTag(trace_data, trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; - response_delay = 0; //We need to hurry here... (but maybe not too much... ??) //exitLoop = true; } else { // Not fullsim, we don't respond // We do not know what to answer, so lets keep quiet if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { - // dbprintf:ing ... - Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x" - ,csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]); - Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len, - receivedCmd[0], receivedCmd[1], receivedCmd[2], - receivedCmd[3], receivedCmd[4], receivedCmd[5], - receivedCmd[6], receivedCmd[7], receivedCmd[8]); if (reader_mac_buf != NULL) { // save NR and MAC for sim 2,4 memcpy(reader_mac_buf + 8, receivedCmd + 1, 8); @@ -1223,14 +1044,11 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // OBS! If this is implemented, don't forget to regenerate the cipher_state // We're expected to respond with the data+crc, exactly what's already in the receivedCmd // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b - - //Take the data... memcpy(data_generic_trace, receivedCmd + 2, 8); - //Add crc AppendCrc(data_generic_trace, 8); trace_data = data_generic_trace; trace_data_size = 10; - CodeIClassTagAnswer(trace_data, trace_data_size); + CodeIso15693AsTag(trace_data, trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; @@ -1243,9 +1061,13 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // Otherwise, we should answer 8bytes (block) + 2bytes CRC } else { - //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44 // Never seen this command before - print_result("Unhandled command received from reader ", receivedCmd, len); + char debug_message[250]; // should be enough + sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len); + for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) { + sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]); + } + Dbprintf("%s", debug_message); // Do not respond } @@ -1253,22 +1075,11 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { A legit tag has about 330us delay between reader EOT and tag SOF. **/ if (modulated_response_size > 0) { - SendIClassAnswer(modulated_response, modulated_response_size, response_delay); - t2r_time = GetCountSspClk(); + uint32_t response_time = reader_eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM - DELAY_ARM_TO_READER_SIM; + TransmitTo15693Reader(modulated_response, modulated_response_size, response_time, false); + LogTrace(trace_data, trace_data_size, response_time + DELAY_ARM_TO_READER_SIM, response_time + (modulated_response_size << 6) + DELAY_ARM_TO_READER_SIM, NULL, false); } - uint8_t parity[MAX_PARITY_SIZE]; - GetParity(receivedCmd, len, parity); - LogTrace(receivedCmd, len, (r2t_time-time_0) << 4, (r2t_time-time_0) << 4, parity, true); - - if (trace_data != NULL) { - GetParity(trace_data, trace_data_size, parity); - LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, false); - } - if (!get_tracing()) { - DbpString("Trace full"); - //break; - } } LED_A_OFF(); @@ -1298,7 +1109,12 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain uint32_t simType = arg0; uint32_t numberOfCSNS = arg1; + // setup hardware for simulation: FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); + StartCountSspClk(); // Enable and clear the trace set_tracing(true); @@ -1330,6 +1146,12 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain // Button pressed break; } + Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x", + datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3], + datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]); + Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x", + datain[i*8+ 8], datain[i*8+ 9], datain[i*8+10], datain[i*8+11], + datain[i*8+12], datain[i*8+13], datain[i*8+14], datain[i*8+15]); } cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16); } else if (simType == ICLASS_SIM_MODE_FULL) { diff --git a/armsrc/iso15693.c b/armsrc/iso15693.c index f4120512..7fdf2a35 100644 --- a/armsrc/iso15693.c +++ b/armsrc/iso15693.c @@ -68,27 +68,14 @@ static int DEBUG = 0; /////////////////////////////////////////////////////////////////////// // ISO 15693 Part 2 - Air Interface -// This section basicly contains transmission and receiving of bits +// This section basically contains transmission and receiving of bits /////////////////////////////////////////////////////////////////////// -#define Crc(data,datalen) Iso15693Crc(data,datalen) -#define AddCrc(data,datalen) Iso15693AddCrc(data,datalen) -#define sprintUID(target,uid) Iso15693sprintUID(target,uid) - // buffers -#define ISO15693_DMA_BUFFER_SIZE 2048 // must be a power of 2 +#define ISO15693_DMA_BUFFER_SIZE 2048 // must be a power of 2 #define ISO15693_MAX_RESPONSE_LENGTH 36 // allows read single block with the maximum block size of 256bits. Read multiple blocks not supported yet #define ISO15693_MAX_COMMAND_LENGTH 45 // allows write single block with the maximum block size of 256bits. Write multiple blocks not supported yet -// timing. Delays in SSP_CLK ticks. -// SSP_CLK runs at 13,56MHz / 32 = 423.75kHz when simulating a tag -#define DELAY_READER_TO_ARM_SIM 8 -#define DELAY_ARM_TO_READER_SIM 1 -#define DELAY_ISO15693_VCD_TO_VICC_SIM 132 // 132/423.75kHz = 311.5us from end of command EOF to start of tag response -//SSP_CLK runs at 13.56MHz / 4 = 3,39MHz when acting as reader -#define DELAY_ISO15693_VCD_TO_VICC_READER 1056 // 1056/3,39MHz = 311.5us from end of command EOF to start of tag response -#define DELAY_ISO15693_VICC_TO_VCD_READER 1017 // 1017/3.39MHz = 300us between end of tag response and next reader command - // --------------------------- // Signal Processing // --------------------------- @@ -228,22 +215,72 @@ static void CodeIso15693AsReader256(uint8_t *cmd, int n) } -static void CodeIso15693AsTag(uint8_t *cmd, int n) -{ +// static uint8_t encode4Bits(const uint8_t b) { + // uint8_t c = b & 0xF; + // // OTA, the least significant bits first + // // The columns are + // // 1 - Bit value to send + // // 2 - Reversed (big-endian) + // // 3 - Manchester Encoded + // // 4 - Hex values + + // switch(c){ + // // 1 2 3 4 + // case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55 + // case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95 + // case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65 + // case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5 + // case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59 + // case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99 + // case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69 + // case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9 + // case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56 + // case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96 + // case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66 + // case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6 + // case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a + // case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a + // case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a + // default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa + + // } +// } + +void CodeIso15693AsTag(uint8_t *cmd, size_t len) { + /* + * SOF comprises 3 parts; + * * An unmodulated time of 56.64 us + * * 24 pulses of 423.75 kHz (fc/32) + * * A logic 1, which starts with an unmodulated time of 18.88us + * followed by 8 pulses of 423.75kHz (fc/32) + * + * EOF comprises 3 parts: + * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated + * time of 18.88us. + * - 24 pulses of fc/32 + * - An unmodulated time of 56.64 us + * + * A logic 0 starts with 8 pulses of fc/32 + * followed by an unmodulated time of 256/fc (~18,88us). + * + * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by + * 8 pulses of fc/32 (also 18.88us) + * + * A bit here becomes 8 pulses of fc/32. Therefore: + * The SOF can be written as 00011101 = 0x1D + * The EOF can be written as 10111000 = 0xb8 + * A logic 1 is 01 + * A logic 0 is 10 + * + * */ + ToSendReset(); // SOF - ToSendStuffBit(0); - ToSendStuffBit(0); - ToSendStuffBit(0); - ToSendStuffBit(1); - ToSendStuffBit(1); - ToSendStuffBit(1); - ToSendStuffBit(0); - ToSendStuffBit(1); + ToSend[++ToSendMax] = 0x1D; // 00011101 // data - for(int i = 0; i < n; i++) { + for(int i = 0; i < len; i++) { for(int j = 0; j < 8; j++) { if ((cmd[i] >> j) & 0x01) { ToSendStuffBit(0); @@ -256,14 +293,7 @@ static void CodeIso15693AsTag(uint8_t *cmd, int n) } // EOF - ToSendStuffBit(1); - ToSendStuffBit(0); - ToSendStuffBit(1); - ToSendStuffBit(1); - ToSendStuffBit(1); - ToSendStuffBit(0); - ToSendStuffBit(0); - ToSendStuffBit(0); + ToSend[++ToSendMax] = 0xB8; // 10111000 ToSendMax++; } @@ -297,41 +327,41 @@ static void TransmitTo15693Tag(const uint8_t *cmd, int len, uint32_t start_time) //----------------------------------------------------------------------------- // Transmit the tag response (to the reader) that was placed in cmd[]. //----------------------------------------------------------------------------- -static void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow) -{ +void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow) { // don't use the FPGA_HF_SIMULATOR_MODULATE_424K_8BIT minor mode. It would spoil GetCountSspClk() FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K); uint8_t shift_delay = start_time & 0x00000007; - uint8_t bitmask = 0x00; - for (int i = 0; i < shift_delay; i++) { - bitmask |= (0x01 << i); - } while (GetCountSspClk() < (start_time & 0xfffffff8)) ; - AT91C_BASE_SSC->SSC_THR = 0x00; // clear TXRDY - LED_C_ON(); uint8_t bits_to_shift = 0x00; - for(size_t c = 0; c <= len; c++) { - uint8_t bits_to_send = bits_to_shift << (8 - shift_delay) | (c==len?0x00:cmd[c]) >> shift_delay; - bits_to_shift = cmd[c] & bitmask; + uint8_t bits_to_send = 0x00; + for(size_t c = 0; c < len; c++) { for (int i = 7; i >= 0; i--) { + uint8_t cmd_bits = ((cmd[c] >> i) & 0x01) ? 0xff : 0x00; for (int j = 0; j < (slow?4:1); ) { + bits_to_send = bits_to_shift << (8 - shift_delay) | cmd_bits >> shift_delay; + bits_to_shift = cmd_bits; if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { - if (bits_to_send >> i & 0x01) { - AT91C_BASE_SSC->SSC_THR = 0xff; - } else { - AT91C_BASE_SSC->SSC_THR = 0x00; - } + AT91C_BASE_SSC->SSC_THR = bits_to_send; j++; } - WDT_HIT(); } } + WDT_HIT(); } + // send the remaining bits, padded with 0: + bits_to_send = bits_to_shift << (8 - shift_delay); + for ( ; ; ) { + if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { + AT91C_BASE_SSC->SSC_THR = bits_to_send; + break; + } + } LED_C_OFF(); + } @@ -682,9 +712,9 @@ static void DecodeReaderReset(DecodeReader_t* DecodeReader) static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uint8_t bit, DecodeReader_t *restrict DecodeReader) { - switch(DecodeReader->state) { + switch (DecodeReader->state) { case STATE_READER_UNSYNCD: - if(!bit) { + if (!bit) { // we went low, so this could be the beginning of a SOF DecodeReader->posCount = 1; DecodeReader->state = STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF; @@ -693,14 +723,14 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin case STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF: DecodeReader->posCount++; - if(bit) { // detected rising edge - if(DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5) + if (bit) { // detected rising edge + if (DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5) DecodeReaderReset(DecodeReader); } else { // SOF DecodeReader->state = STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF; } } else { - if(DecodeReader->posCount > 5) { // stayed low for too long + if (DecodeReader->posCount > 5) { // stayed low for too long DecodeReaderReset(DecodeReader); } else { // do nothing, keep waiting @@ -710,7 +740,7 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin case STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF: DecodeReader->posCount++; - if(!bit) { // detected a falling edge + if (!bit) { // detected a falling edge if (DecodeReader->posCount < 20) { // falling edge too early (nominally expected at 21 earliest) DecodeReaderReset(DecodeReader); } else if (DecodeReader->posCount < 23) { // SOF for 1 out of 4 coding @@ -723,7 +753,7 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF; } } else { - if(DecodeReader->posCount > 29) { // stayed high for too long + if (DecodeReader->posCount > 29) { // stayed high for too long DecodeReaderReset(DecodeReader); } else { // do nothing, keep waiting @@ -881,19 +911,18 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin // 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 // spinning, waiting for a well-framed command, until either we get one -// (returns true) or someone presses the pushbutton on the board (false). +// (returns len) or someone presses the pushbutton on the board (returns -1). // // Assume that we're called with the SSC (to the FPGA) and ADC path set // correctly. //----------------------------------------------------------------------------- -static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time) -{ +int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time) { int samples = 0; bool gotFrame = false; uint8_t b; - uint8_t *dmaBuf = BigBuf_malloc(ISO15693_DMA_BUFFER_SIZE); + uint8_t dmaBuf[ISO15693_DMA_BUFFER_SIZE]; // the decoder data structure DecodeReader_t DecodeReader = {0}; @@ -910,21 +939,21 @@ static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint3 (void) temp; while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ; - uint32_t bit_time = GetCountSspClk() & 0xfffffff8; + uint32_t dma_start_time = GetCountSspClk() & 0xfffffff8; // Setup and start DMA. FpgaSetupSscDma(dmaBuf, ISO15693_DMA_BUFFER_SIZE); uint8_t *upTo = dmaBuf; - for(;;) { + for (;;) { uint16_t behindBy = ((uint8_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1); if (behindBy == 0) continue; b = *upTo++; - if(upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. + if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. upTo = dmaBuf; // start reading the circular buffer from the beginning - if(behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) { + if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) { Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy); break; } @@ -936,7 +965,7 @@ static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint3 for (int i = 7; i >= 0; i--) { if (Handle15693SampleFromReader((b >> i) & 0x01, &DecodeReader)) { - *eof_time = bit_time + samples - DELAY_READER_TO_ARM_SIM; // end of EOF + *eof_time = dma_start_time + samples - DELAY_READER_TO_ARM_SIM; // end of EOF gotFrame = true; break; } @@ -948,22 +977,24 @@ static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint3 } if (BUTTON_PRESS()) { - DecodeReader.byteCount = 0; + DecodeReader.byteCount = -1; break; } WDT_HIT(); } - FpgaDisableSscDma(); - BigBuf_free_keep_EM(); if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d", samples, gotFrame, DecodeReader.state, DecodeReader.byteCount, DecodeReader.bitCount, DecodeReader.posCount); if (DecodeReader.byteCount > 0) { - LogTrace(DecodeReader.output, DecodeReader.byteCount, 0, *eof_time, NULL, true); + uint32_t sof_time = *eof_time + - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128:2048) // time for byte transfers + - 32 // time for SOF transfer + - 16; // time for EOF transfer + LogTrace(DecodeReader.output, DecodeReader.byteCount, sof_time, *eof_time, NULL, true); } return DecodeReader.byteCount; @@ -985,7 +1016,7 @@ static void BuildIdentifyRequest(void) // no mask cmd[2] = 0x00; //Now the CRC - crc = Crc(cmd, 3); + crc = Iso15693Crc(cmd, 3); cmd[3] = crc & 0xff; cmd[4] = crc >> 8; @@ -1219,7 +1250,7 @@ static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber ) // Block number to read cmd[10] = blockNumber; //Now the CRC - crc = Crc(cmd, 11); // the crc needs to be calculated over 11 bytes + crc = Iso15693Crc(cmd, 11); // the crc needs to be calculated over 11 bytes cmd[11] = crc & 0xff; cmd[12] = crc >> 8; @@ -1246,7 +1277,7 @@ static void BuildInventoryResponse(uint8_t *uid) cmd[8] = uid[1]; //0x05; cmd[9] = uid[0]; //0xe0; //Now the CRC - crc = Crc(cmd, 10); + crc = Iso15693Crc(cmd, 10); cmd[10] = crc & 0xff; cmd[11] = crc >> 8; @@ -1341,7 +1372,7 @@ void DbdecodeIso15693Answer(int len, uint8_t *d) { strncat(status,"NoErr ", DBD15STATLEN); } - crc=Crc(d,len-2); + crc=Iso15693Crc(d,len-2); if ( (( crc & 0xff ) == d[len-2]) && (( crc >> 8 ) == d[len-1]) ) strncat(status,"CrcOK",DBD15STATLEN); else @@ -1526,12 +1557,12 @@ void BruteforceIso15693Afi(uint32_t speed) data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1; data[1] = ISO15693_INVENTORY; data[2] = 0; // mask length - datalen = AddCrc(data,3); + datalen = Iso15693AddCrc(data,3); recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), 0); uint32_t start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER; WDT_HIT(); if (recvlen>=12) { - Dbprintf("NoAFI UID=%s", sprintUID(NULL, &recv[2])); + Dbprintf("NoAFI UID=%s", Iso15693sprintUID(NULL, &recv[2])); } // now with AFI @@ -1543,12 +1574,12 @@ void BruteforceIso15693Afi(uint32_t speed) for (int i = 0; i < 256; i++) { data[2] = i & 0xFF; - datalen = AddCrc(data,4); + datalen = Iso15693AddCrc(data,4); recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time); start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER; WDT_HIT(); if (recvlen >= 12) { - Dbprintf("AFI=%i UID=%s", i, sprintUID(NULL, &recv[2])); + Dbprintf("AFI=%i UID=%s", i, Iso15693sprintUID(NULL, &recv[2])); } } Dbprintf("AFI Bruteforcing done."); @@ -1646,7 +1677,7 @@ void SetTag15693Uid(uint8_t *uid) for (int i=0; i<4; i++) { // Add the CRC - crc = Crc(cmd[i], 7); + crc = Iso15693Crc(cmd[i], 7); cmd[i][7] = crc & 0xff; cmd[i][8] = crc >> 8; @@ -1702,7 +1733,7 @@ static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid) cmd[8] = 0x05; cmd[9]= 0xe0; // always e0 (not exactly unique) //Now the CRC - crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes + crc = Iso15693Crc(cmd, 10); // the crc needs to be calculated over 2 bytes cmd[10] = crc & 0xff; cmd[11] = crc >> 8; @@ -1737,7 +1768,7 @@ static void __attribute__((unused)) BuildReadMultiBlockRequest(uint8_t *uid) // Number of Blocks to read cmd[11] = 0x2f; // read quite a few //Now the CRC - crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes + crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes cmd[12] = crc & 0xff; cmd[13] = crc >> 8; @@ -1772,7 +1803,7 @@ static void __attribute__((unused)) BuildArbitraryRequest(uint8_t *uid,uint8_t C // cmd[12] = 0x00; // cmd[13] = 0x00; //Now the CRC - crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes + crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes cmd[12] = crc & 0xff; cmd[13] = crc >> 8; @@ -1807,7 +1838,7 @@ static void __attribute__((unused)) BuildArbitraryCustomRequest(uint8_t uid[], u // cmd[12] = 0x00; // cmd[13] = 0x00; //Now the CRC - crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes + crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes cmd[12] = crc & 0xff; cmd[13] = crc >> 8; diff --git a/armsrc/iso15693.h b/armsrc/iso15693.h index 68df2693..f6cf29f1 100644 --- a/armsrc/iso15693.h +++ b/armsrc/iso15693.h @@ -8,17 +8,31 @@ // Routines to support ISO 15693. //----------------------------------------------------------------------------- -#ifndef __ISO15693_H -#define __ISO15693_H +#ifndef ISO15693_H__ +#define ISO15693_H__ #include +#include +#include +// Delays in SSP_CLK ticks. +// SSP_CLK runs at 13,56MHz / 32 = 423.75kHz when simulating a tag +#define DELAY_READER_TO_ARM_SIM 8 +#define DELAY_ARM_TO_READER_SIM 1 +#define DELAY_ISO15693_VCD_TO_VICC_SIM 132 // 132/423.75kHz = 311.5us from end of command EOF to start of tag response +//SSP_CLK runs at 13.56MHz / 4 = 3,39MHz when acting as reader +#define DELAY_ISO15693_VCD_TO_VICC_READER 1056 // 1056/3,39MHz = 311.5us from end of command EOF to start of tag response +#define DELAY_ISO15693_VICC_TO_VCD_READER 1017 // 1017/3.39MHz = 300us between end of tag response and next reader command + +void CodeIso15693AsTag(uint8_t *cmd, size_t len); +int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time); +void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow); void SnoopIso15693(void); void AcquireRawAdcSamplesIso15693(void); void ReaderIso15693(uint32_t parameter); void SimTagIso15693(uint32_t parameter, uint8_t *uid); void BruteforceIso15693Afi(uint32_t speed); -void DirectTag15693Command(uint32_t datalen,uint32_t speed, uint32_t recv, uint8_t data[]); +void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]); void SetTag15693Uid(uint8_t *uid); void SetDebugIso15693(uint32_t flag); diff --git a/client/cmdhflist.c b/client/cmdhflist.c index 5384bfce..1b8e0955 100644 --- a/client/cmdhflist.c +++ b/client/cmdhflist.c @@ -213,30 +213,29 @@ uint8_t iclass_CRC_check(bool isResponse, uint8_t* data, uint8_t len) } -void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize) -{ +void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize) { switch(cmd[0]) { - case ICLASS_CMD_ACTALL: snprintf(exp,size,"ACTALL"); break; - case ICLASS_CMD_READ_OR_IDENTIFY:{ - if(cmdsize > 1){ + case ICLASS_CMD_ACTALL: snprintf(exp, size, "ACTALL"); break; + case ICLASS_CMD_READ_OR_IDENTIFY: { + if (cmdsize > 1){ snprintf(exp,size,"READ(%d)",cmd[1]); - }else{ + } else { snprintf(exp,size,"IDENTIFY"); } break; } - case ICLASS_CMD_SELECT: snprintf(exp,size,"SELECT"); break; - case ICLASS_CMD_PAGESEL: snprintf(exp,size,"PAGESEL(%d)", cmd[1]); break; - case ICLASS_CMD_READCHECK_KC:snprintf(exp,size,"READCHECK[Kc](%d)", cmd[1]); break; - case ICLASS_CMD_READCHECK_KD:snprintf(exp,size,"READCHECK[Kd](%d)", cmd[1]); break; - case ICLASS_CMD_CHECK: snprintf(exp,size,"CHECK"); break; - case ICLASS_CMD_DETECT: snprintf(exp,size,"DETECT"); break; - case ICLASS_CMD_HALT: snprintf(exp,size,"HALT"); break; - case ICLASS_CMD_UPDATE: snprintf(exp,size,"UPDATE(%d)",cmd[1]); break; - case ICLASS_CMD_ACT: snprintf(exp,size,"ACT"); break; - case ICLASS_CMD_READ4: snprintf(exp,size,"READ4(%d)",cmd[1]); break; - default: snprintf(exp,size,"?"); break; + case ICLASS_CMD_SELECT: snprintf(exp,size, "SELECT"); break; + case ICLASS_CMD_PAGESEL: snprintf(exp,size, "PAGESEL(%d)", cmd[1]); break; + case ICLASS_CMD_READCHECK_KC:snprintf(exp,size, "READCHECK[Kc](%d)", cmd[1]); break; + case ICLASS_CMD_READCHECK_KD:snprintf(exp,size, "READCHECK[Kd](%d)", cmd[1]); break; + case ICLASS_CMD_CHECK: snprintf(exp,size, "CHECK"); break; + case ICLASS_CMD_DETECT: snprintf(exp,size, "DETECT"); break; + case ICLASS_CMD_HALT: snprintf(exp,size, "HALT"); break; + case ICLASS_CMD_UPDATE: snprintf(exp,size, "UPDATE(%d)",cmd[1]); break; + case ICLASS_CMD_ACT: snprintf(exp,size, "ACT"); break; + case ICLASS_CMD_READ4: snprintf(exp,size, "READ4(%d)",cmd[1]); break; + default: snprintf(exp,size, "?"); break; } return; } @@ -901,6 +900,13 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui } } + // adjust for different time scales + if (protocol == ICLASS || protocol == ISO_15693) { + first_timestamp *= 32; + timestamp *= 32; + duration *= 32; + } + //Check the CRC status uint8_t crcStatus = 2; @@ -940,6 +946,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui uint8_t parityBits = parityBytes[j>>3]; if (protocol != ISO_14443B && protocol != ISO_15693 + && protocol != ICLASS && protocol != ISO_7816_4 && (isResponse || protocol == ISO_14443A) && (oddparity8(frame[j]) != ((parityBits >> (7-(j&0x0007))) & 0x01))) { @@ -950,8 +957,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui } if (markCRCBytes) { - if(crcStatus == 0 || crcStatus == 1) - {//CRC-command + if (crcStatus == 0 || crcStatus == 1) { //CRC-command char *pos1 = line[(data_len-2)/16]+(((data_len-2) % 16) * 4); (*pos1) = '['; char *pos2 = line[(data_len)/16]+(((data_len) % 16) * 4); @@ -978,8 +984,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui if (protocol == PROTO_MIFARE) annotateMifare(explanation, sizeof(explanation), frame, data_len, parityBytes, parity_len, isResponse); - if(!isResponse) - { + if (!isResponse) { switch(protocol) { case ICLASS: annotateIclass(explanation,sizeof(explanation),frame,data_len); break; case ISO_14443A: annotateIso14443a(explanation,sizeof(explanation),frame,data_len); break; @@ -1027,6 +1032,11 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui if (showWaitCycles && !isResponse && next_record_is_response(tracepos, trace)) { uint32_t next_timestamp = *((uint32_t *)(trace + tracepos)); + // adjust for different time scales + if (protocol == ICLASS || protocol == ISO_15693) { + next_timestamp *= 32; + } + PrintAndLog(" %10d | %10d | %s | fdt (Frame Delay Time): %d", (EndOfTransmissionTimestamp - first_timestamp), (next_timestamp - first_timestamp), diff --git a/common/iso15693tools.h b/common/iso15693tools.h index d9f59cc6..ceb6393e 100644 --- a/common/iso15693tools.h +++ b/common/iso15693tools.h @@ -1,8 +1,8 @@ // ISO15693 commons // Adrian Dabrowski 2010 and others, GPLv2 -#ifndef ISO15693_H__ -#define ISO15693_H__ +#ifndef ISO15693TOOLS_H__ +#define ISO15693TOOLS_H__ // ISO15693 CRC #define ISO15693_CRC_PRESET (uint16_t)0xFFFF @@ -11,7 +11,7 @@ uint16_t Iso15693Crc(uint8_t *v, int n); int Iso15693AddCrc(uint8_t *req, int n); -char* Iso15693sprintUID(char *target,uint8_t *uid); +char* Iso15693sprintUID(char *target, uint8_t *uid); unsigned short iclass_crc16(char *data_p, unsigned short length); #endif -- 2.39.5