X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b41be3cb11103739d2fa92ced09d1e29f8151b7b..c41dd5f9f690777eefd08eaeb43db52f599ce38c:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 2533d1f9..392271bd 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -57,14 +57,17 @@ #include "usb_cdc.h" // for usb_poll_validate_length #include "fpgaloader.h" -static int timeout = 4096; - // iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after // the reader command. This is measured from end of reader EOF to first modulation of the tag's SOF which starts with a 56,64us unmodulated period. // 330us = 140 ssp_clk cycles @ 423,75kHz when simulating. // 56,64us = 24 ssp_clk_cycles -#define DELAY_ICLASS_VCD_TO_VICC_SIM 140 -#define TAG_SOF_UNMODULATED 24 +#define DELAY_ICLASS_VCD_TO_VICC_SIM (140 - 24) +// times in ssp_clk_cycles @ 3,3625MHz when acting as reader +#define DELAY_ICLASS_VICC_TO_VCD_READER DELAY_ISO15693_VICC_TO_VCD_READER +// times in samples @ 212kHz when acting as reader +#define ICLASS_READER_TIMEOUT_ACTALL 330 // 1558us, nominal 330us + 7slots*160us = 1450us +#define ICLASS_READER_TIMEOUT_OTHERS 80 // 380us, nominal 330us + //----------------------------------------------------------------------------- // The software UART that receives commands from the reader, and its state @@ -698,7 +701,7 @@ void RAMFUNC SnoopIClass(void) { //if (!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, true)) break; uint8_t parity[MAX_PARITY_SIZE]; GetParity(Uart.output, Uart.byteCnt, parity); - LogTrace(Uart.output, Uart.byteCnt, time_start, time_stop, parity, true); + LogTrace_ISO15693(Uart.output, Uart.byteCnt, time_start*32, time_stop*32, parity, true); /* And ready to receive another command. */ Uart.state = STATE_UNSYNCD; @@ -723,7 +726,7 @@ void RAMFUNC SnoopIClass(void) { uint8_t parity[MAX_PARITY_SIZE]; GetParity(Demod.output, Demod.len, parity); - LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, false); + LogTrace_ISO15693(Demod.output, Demod.len, time_start*32, time_stop*32, parity, false); // And ready to receive another response. memset(&Demod, 0, sizeof(Demod)); @@ -1230,9 +1233,9 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { A legit tag has about 273,4us delay between reader EOT and tag SOF. **/ if (modulated_response_size > 0) { - uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM - TAG_SOF_UNMODULATED - DELAY_ARM_TO_READER_SIM; + uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM; TransmitTo15693Reader(modulated_response, modulated_response_size, &response_time, 0, 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); + LogTrace_ISO15693(trace_data, trace_data_size, response_time*32, response_time*32 + modulated_response_size/2, NULL, false); } } @@ -1327,214 +1330,22 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain /// THE READER CODE -//----------------------------------------------------------------------------- -// Transmit the command (to the tag) that was placed in ToSend[]. -//----------------------------------------------------------------------------- -static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) { - int c; - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - AT91C_BASE_SSC->SSC_THR = 0x00; - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); - - if (wait) { - if (*wait < 10) *wait = 10; +static void ReaderTransmitIClass(uint8_t *frame, int len, uint32_t *start_time) { - for (c = 0; c < *wait;) { - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! - c++; - } - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; - (void)r; - } - WDT_HIT(); - } - } - - uint8_t sendbyte; - bool firstpart = true; - c = 0; - for (;;) { - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + CodeIso15693AsReader(frame, len); - // DOUBLE THE SAMPLES! - if (firstpart) { - sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4); - } else { - sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4); - c++; - } - if (sendbyte == 0xff) { - sendbyte = 0xfe; - } - AT91C_BASE_SSC->SSC_THR = sendbyte; - firstpart = !firstpart; + TransmitTo15693Tag(ToSend, ToSendMax, start_time); - if (c >= len) { - break; - } - } - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; - (void)r; - } - WDT_HIT(); - } - if (samples && wait) *samples = (c + *wait) << 3; + uint32_t end_time = *start_time + 32*(8*ToSendMax-4); // substract the 4 padding bits after EOF + LogTrace_ISO15693(frame, len, *start_time*4, end_time*4, NULL, true); } -//----------------------------------------------------------------------------- -// Prepare iClass reader command to send to FPGA -//----------------------------------------------------------------------------- -void CodeIClassCommand(const uint8_t *cmd, int len) { - int i, j, k; - - ToSendReset(); - - // Start of Communication: 1 out of 4 - ToSend[++ToSendMax] = 0xf0; - ToSend[++ToSendMax] = 0x00; - ToSend[++ToSendMax] = 0x0f; - ToSend[++ToSendMax] = 0x00; - - // Modulate the bytes - for (i = 0; i < len; i++) { - uint8_t b = cmd[i]; - for (j = 0; j < 4; j++) { - for (k = 0; k < 4; k++) { - if (k == (b & 3)) { - ToSend[++ToSendMax] = 0x0f; - } else { - ToSend[++ToSendMax] = 0x00; - } - } - b >>= 2; - } - } - - // End of Communication - ToSend[++ToSendMax] = 0x00; - ToSend[++ToSendMax] = 0x00; - ToSend[++ToSendMax] = 0xf0; - ToSend[++ToSendMax] = 0x00; - - // Convert from last character reference to length - ToSendMax++; -} - -static void ReaderTransmitIClass(uint8_t *frame, int len) { - int wait = 0; - int samples = 0; - - // This is tied to other size changes - CodeIClassCommand(frame, len); - - // Select the card - TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait); - if (trigger) - LED_A_ON(); - - // Store reader command in buffer - uint8_t par[MAX_PARITY_SIZE]; - GetParity(frame, len, par); - LogTrace(frame, len, rsamples, rsamples, par, true); -} - -//----------------------------------------------------------------------------- -// Wait a certain time for tag response -// If a response is captured return true -// If it takes too long return false -//----------------------------------------------------------------------------- -static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) { - //uint8_t *buffer - // buffer needs to be 512 bytes - int c; - - // Set FPGA mode to "reader listen mode", no modulation (listen - // only, since we are receiving, not transmitting). - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); - - // Now get the answer from the card - Demod.output = receivedResponse; - Demod.len = 0; - Demod.state = DEMOD_UNSYNCD; - - uint8_t b; - if (elapsed) *elapsed = 0; - - bool skip = false; - - c = 0; - for (;;) { - WDT_HIT(); - - if (BUTTON_PRESS()) return false; - - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! - if (elapsed) (*elapsed)++; - } - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - if (c < timeout) { - c++; - } else { - return false; - } - b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - skip = !skip; - if (skip) continue; - - if (ManchesterDecoding(b & 0x0f)) { - *samples = c << 3; - return true; - } - } - } -} - -static int ReaderReceiveIClass(uint8_t *receivedAnswer) { - int samples = 0; - if (!GetIClassAnswer(receivedAnswer, 160, &samples, 0)) { - return false; - } - rsamples += samples; - uint8_t parity[MAX_PARITY_SIZE]; - GetParity(receivedAnswer, Demod.len, parity); - LogTrace(receivedAnswer, Demod.len, rsamples, rsamples, parity, false); - if (samples == 0) return false; - return Demod.len; -} - -static void setupIclassReader() { - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - // Reset trace buffer - set_tracing(true); - clear_trace(); - - // Setup SSC - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); - // Start from off (no field generated) - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - SpinDelay(200); - - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - - // Now give it time to spin up. - // Signal field is on with the appropriate LED - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - SpinDelay(200); - LED_A_ON(); - -} - -static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries) { +static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, size_t max_resp_size, + uint8_t expected_size, uint8_t retries, uint32_t start_time, uint32_t *eof_time) { while (retries-- > 0) { - ReaderTransmitIClass(command, cmdsize); - if (expected_size == ReaderReceiveIClass(resp)) { + ReaderTransmitIClass(command, cmdsize, &start_time); + if (expected_size == GetIso15693AnswerFromTag(resp, max_resp_size, ICLASS_READER_TIMEOUT_OTHERS, eof_time)) { return true; } } @@ -1548,12 +1359,11 @@ static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint * 1 = Got CSN * 2 = Got CSN and CC */ -static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { - static uint8_t act_all[] = { 0x0a }; - //static uint8_t identify[] = { 0x0c }; - static uint8_t identify[] = { 0x0c, 0x00, 0x73, 0x33 }; - static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - static uint8_t readcheck_cc[]= { 0x88, 0x02 }; +static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key, uint32_t *eof_time) { + uint8_t act_all[] = { 0x0a }; + uint8_t identify[] = { 0x0c }; + uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + uint8_t readcheck_cc[] = { 0x88, 0x02 }; if (use_credit_key) readcheck_cc[0] = 0x18; else @@ -1562,24 +1372,28 @@ static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { uint8_t resp[ICLASS_BUFFER_SIZE]; uint8_t read_status = 0; + uint32_t start_time = GetCountSspClk(); // Send act_all - ReaderTransmitIClass(act_all, 1); + ReaderTransmitIClass(act_all, 1, &start_time); // Card present? - if (!ReaderReceiveIClass(resp)) return read_status;//Fail - + if (GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_ACTALL, eof_time) < 0) return read_status;//Fail + //Send Identify - ReaderTransmitIClass(identify, 1); + start_time = *eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + ReaderTransmitIClass(identify, 1, &start_time); + // FpgaDisableTracing(); // DEBUGGING //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC - uint8_t len = ReaderReceiveIClass(resp); + uint8_t len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time); if (len != 10) return read_status;//Fail //Copy the Anti-collision CSN to our select-packet memcpy(&select[1], resp, 8); //Select the card - ReaderTransmitIClass(select, sizeof(select)); + start_time = *eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + ReaderTransmitIClass(select, sizeof(select), &start_time); //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC - len = ReaderReceiveIClass(resp); + len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time); if (len != 10) return read_status;//Fail //Success - level 1, we got CSN @@ -1590,8 +1404,9 @@ static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { read_status = 1; // Card selected, now read e-purse (cc) (only 8 bytes no CRC) - ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc)); - if (ReaderReceiveIClass(resp) == 8) { + start_time = *eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc), &start_time); + if (GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time) == 8) { //Save CC (e-purse) in response data memcpy(card_data+8, resp, 8); read_status++; @@ -1600,8 +1415,8 @@ static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { return read_status; } -static uint8_t handshakeIclassTag(uint8_t *card_data) { - return handshakeIclassTag_ext(card_data, false); +static uint8_t handshakeIclassTag(uint8_t *card_data, uint32_t *eof_time) { + return handshakeIclassTag_ext(card_data, false, eof_time); } @@ -1633,8 +1448,13 @@ void ReaderIClass(uint8_t arg0) { uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA; set_tracing(true); - setupIclassReader(); + clear_trace(); + Iso15693InitReader(); + StartCountSspClk(); + uint32_t start_time = 0; + uint32_t eof_time = 0; + uint16_t tryCnt = 0; bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); while (!userCancelled) { @@ -1649,29 +1469,31 @@ void ReaderIClass(uint8_t arg0) { } WDT_HIT(); - read_status = handshakeIclassTag_ext(card_data, use_credit_key); + read_status = handshakeIclassTag_ext(card_data, use_credit_key, &eof_time); if (read_status == 0) continue; if (read_status == 1) result_status = FLAG_ICLASS_READER_CSN; if (read_status == 2) result_status = FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CC; + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; // handshakeIclass returns CSN|CC, but the actual block // layout is CSN|CONFIG|CC, so here we reorder the data, // moving CC forward 8 bytes memcpy(card_data+16, card_data+8, 8); //Read block 1, config if (flagReadConfig) { - if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10)) { + if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, sizeof(resp), 10, 10, start_time, &eof_time)) { result_status |= FLAG_ICLASS_READER_CONF; memcpy(card_data+8, resp, 8); } else { Dbprintf("Failed to dump config block"); } + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; } //Read block 5, AA if (flagReadAA) { - if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10)) { + if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, sizeof(resp), 10, 10, start_time, &eof_time)) { result_status |= FLAG_ICLASS_READER_AA; memcpy(card_data + (8*5), resp, 8); } else { @@ -1746,9 +1568,14 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { uint8_t resp[ICLASS_BUFFER_SIZE]; - setupIclassReader(); set_tracing(true); + clear_trace(); + Iso15693InitReader(); + StartCountSspClk(); + uint32_t start_time = 0; + uint32_t eof_time = 0; + while (!BUTTON_PRESS()) { WDT_HIT(); @@ -1758,28 +1585,34 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { break; } - uint8_t read_status = handshakeIclassTag(card_data); + uint8_t read_status = handshakeIclassTag(card_data, &eof_time); + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + if (read_status < 2) continue; //for now replay captured auth (as cc not updated) memcpy(check+5, MAC, 4); - if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 5)) { + if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 5, start_time, &eof_time)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; Dbprintf("Error: Authentication Fail!"); continue; } + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; //first get configuration block (block 1) crc = block_crc_LUT[1]; read[1] = 1; read[2] = crc >> 8; read[3] = crc & 0xff; - if (!sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10)) { + if (!sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, &eof_time)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; Dbprintf("Dump config (block 1) failed"); continue; } + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; mem = resp[5]; memory.k16 = (mem & 0x80); memory.book = (mem & 0x20); @@ -1800,7 +1633,8 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { read[2] = crc >> 8; read[3] = crc & 0xff; - if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10)) { + if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, &eof_time)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x", block, resp[0], resp[1], resp[2], resp[3], resp[4], resp[5], @@ -1857,7 +1691,8 @@ void iClass_Authentication(uint8_t *MAC) { uint8_t resp[ICLASS_BUFFER_SIZE]; memcpy(check+5, MAC, 4); bool isOK; - isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6); + uint32_t eof_time; + isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 6, 0, &eof_time); cmd_send(CMD_ACK,isOK, 0, 0, 0, 0); } @@ -1867,11 +1702,12 @@ static bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) { uint16_t rdCrc = iclass_crc16(&bl, 1); readcmd[2] = rdCrc >> 8; readcmd[3] = rdCrc & 0xff; - uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; + uint8_t resp[10]; bool isOK = false; - + uint32_t eof_time; + //readcmd[1] = blockNo; - isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10); + isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, sizeof(resp), 10, 10, 0, &eof_time); memcpy(readdata, resp, sizeof(resp)); return isOK; @@ -1929,16 +1765,18 @@ static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) { uint16_t wrCrc = iclass_crc16(wrCmd, 13); write[14] = wrCrc >> 8; write[15] = wrCrc & 0xff; - uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; + uint8_t resp[10]; bool isOK = false; - - isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); + uint32_t eof_time = 0; + + isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10, 10, 0, &eof_time); + uint32_t start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; if (isOK) { //if reader responded correctly //Dbprintf("WriteResp: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",resp[0],resp[1],resp[2],resp[3],resp[4],resp[5],resp[6],resp[7],resp[8],resp[9]); if (memcmp(write+2, resp, 8)) { //if response is not equal to write values if (blockNo != 3 && blockNo != 4) { //if not programming key areas (note key blocks don't get programmed with actual key data it is xor data) //error try again - isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); + isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10, 10, start_time, &eof_time); } } }