X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e49d31c0e798d14d8b0607b953f06dceecb4a42e..e938f7101179641c9478e9c914bc1bb3ee171570:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 2e3a4db8..6a2fd648 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -57,698 +57,30 @@ #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 - 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_UPDATE 3390 // 16000us, nominal 4-15ms +#define ICLASS_READER_TIMEOUT_OTHERS 80 // 380us, nominal 330us -//----------------------------------------------------------------------------- -// The software UART that receives commands from the reader, and its state -// variables. -//----------------------------------------------------------------------------- -static struct { - enum { - STATE_UNSYNCD, - STATE_START_OF_COMMUNICATION, - STATE_RECEIVING - } state; - uint16_t shiftReg; - int bitCnt; - int byteCnt; - int byteCntMax; - int posCnt; - int nOutOfCnt; - int OutOfCnt; - int syncBit; - int samples; - int highCnt; - int swapper; - int counter; - int bitBuffer; - int dropPosition; - uint8_t *output; -} Uart; - -static RAMFUNC int OutOfNDecoding(int bit) { - //int error = 0; - int bitright; - - if (!Uart.bitBuffer) { - Uart.bitBuffer = bit ^ 0xFF0; - return false; - } else { - Uart.bitBuffer <<= 4; - Uart.bitBuffer ^= bit; - } - - /*if (Uart.swapper) { - Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; - Uart.byteCnt++; - Uart.swapper = 0; - if (Uart.byteCnt > 15) { return true; } - } - else { - Uart.swapper = 1; - }*/ - - if (Uart.state != STATE_UNSYNCD) { - Uart.posCnt++; - - if ((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) { - bit = 0x00; - } else { - bit = 0x01; - } - if (((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) { - bitright = 0x00; - } else { - bitright = 0x01; - } - if (bit != bitright) { - bit = bitright; - } - - - // So, now we only have to deal with *bit*, lets see... - if (Uart.posCnt == 1) { - // measurement first half bitperiod - if (!bit) { - // Drop in first half means that we are either seeing - // an SOF or an EOF. - - if (Uart.nOutOfCnt == 1) { - // End of Communication - Uart.state = STATE_UNSYNCD; - Uart.highCnt = 0; - if (Uart.byteCnt == 0) { - // Its not straightforward to show single EOFs - // So just leave it and do not return true - Uart.output[0] = 0xf0; - Uart.byteCnt++; - } else { - return true; - } - } else if (Uart.state != STATE_START_OF_COMMUNICATION) { - // When not part of SOF or EOF, it is an error - Uart.state = STATE_UNSYNCD; - Uart.highCnt = 0; - //error = 4; - } - } - } else { - // measurement second half bitperiod - // Count the bitslot we are in... (ISO 15693) - Uart.nOutOfCnt++; - - if (!bit) { - if (Uart.dropPosition) { - if (Uart.state == STATE_START_OF_COMMUNICATION) { - //error = 1; - } else { - //error = 7; - } - // It is an error if we already have seen a drop in current frame - Uart.state = STATE_UNSYNCD; - Uart.highCnt = 0; - } else { - Uart.dropPosition = Uart.nOutOfCnt; - } - } +#define ICLASS_BUFFER_SIZE 34 // we expect max 34 bytes as tag answer (response to READ4) - Uart.posCnt = 0; - - - if (Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) { - Uart.nOutOfCnt = 0; - - if (Uart.state == STATE_START_OF_COMMUNICATION) { - if (Uart.dropPosition == 4) { - Uart.state = STATE_RECEIVING; - Uart.OutOfCnt = 256; - } else if (Uart.dropPosition == 3) { - Uart.state = STATE_RECEIVING; - Uart.OutOfCnt = 4; - //Uart.output[Uart.byteCnt] = 0xdd; - //Uart.byteCnt++; - } else { - Uart.state = STATE_UNSYNCD; - Uart.highCnt = 0; - } - Uart.dropPosition = 0; - } else { - // RECEIVING DATA - // 1 out of 4 - if (!Uart.dropPosition) { - Uart.state = STATE_UNSYNCD; - Uart.highCnt = 0; - //error = 9; - } else { - Uart.shiftReg >>= 2; - - // Swap bit order - Uart.dropPosition--; - //if (Uart.dropPosition == 1) { Uart.dropPosition = 2; } - //else if (Uart.dropPosition == 2) { Uart.dropPosition = 1; } - - Uart.shiftReg ^= ((Uart.dropPosition & 0x03) << 6); - Uart.bitCnt += 2; - Uart.dropPosition = 0; - - if (Uart.bitCnt == 8) { - Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff); - Uart.byteCnt++; - Uart.bitCnt = 0; - Uart.shiftReg = 0; - } - } - } - } else if (Uart.nOutOfCnt == Uart.OutOfCnt) { - // RECEIVING DATA - // 1 out of 256 - if (!Uart.dropPosition) { - Uart.state = STATE_UNSYNCD; - Uart.highCnt = 0; - //error = 3; - } else { - Uart.dropPosition--; - Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff); - Uart.byteCnt++; - Uart.bitCnt = 0; - Uart.shiftReg = 0; - Uart.nOutOfCnt = 0; - Uart.dropPosition = 0; - } - } - - /*if (error) { - Uart.output[Uart.byteCnt] = 0xAA; - Uart.byteCnt++; - Uart.output[Uart.byteCnt] = error & 0xFF; - Uart.byteCnt++; - Uart.output[Uart.byteCnt] = 0xAA; - Uart.byteCnt++; - Uart.output[Uart.byteCnt] = (Uart.bitBuffer >> 8) & 0xFF; - Uart.byteCnt++; - Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; - Uart.byteCnt++; - Uart.output[Uart.byteCnt] = (Uart.syncBit >> 3) & 0xFF; - Uart.byteCnt++; - Uart.output[Uart.byteCnt] = 0xAA; - Uart.byteCnt++; - return true; - }*/ - } - - } else { - bit = Uart.bitBuffer & 0xf0; - bit >>= 4; - bit ^= 0x0F; // drops become 1s ;-) - if (bit) { - // should have been high or at least (4 * 128) / fc - // according to ISO this should be at least (9 * 128 + 20) / fc - if (Uart.highCnt == 8) { - // we went low, so this could be start of communication - // it turns out to be safer to choose a less significant - // syncbit... so we check whether the neighbour also represents the drop - Uart.posCnt = 1; // apparently we are busy with our first half bit period - Uart.syncBit = bit & 8; - Uart.samples = 3; - if (!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; } - else if (bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; } - if (!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } - else if (bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } - if (!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; - if (Uart.syncBit && (Uart.bitBuffer & 8)) { - Uart.syncBit = 8; - - // the first half bit period is expected in next sample - Uart.posCnt = 0; - Uart.samples = 3; - } - } else if (bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; } - - Uart.syncBit <<= 4; - Uart.state = STATE_START_OF_COMMUNICATION; - Uart.bitCnt = 0; - Uart.byteCnt = 0; - Uart.nOutOfCnt = 0; - Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256 - Uart.dropPosition = 0; - Uart.shiftReg = 0; - //error = 0; - } else { - Uart.highCnt = 0; - } - } else if (Uart.highCnt < 8) { - Uart.highCnt++; - } - } - - return false; -} - -//============================================================================= -// Manchester //============================================================================= - -static struct { - enum { - DEMOD_UNSYNCD, - DEMOD_START_OF_COMMUNICATION, - DEMOD_START_OF_COMMUNICATION2, - DEMOD_START_OF_COMMUNICATION3, - DEMOD_SOF_COMPLETE, - DEMOD_MANCHESTER_D, - DEMOD_MANCHESTER_E, - DEMOD_END_OF_COMMUNICATION, - DEMOD_END_OF_COMMUNICATION2, - DEMOD_MANCHESTER_F, - DEMOD_ERROR_WAIT - } state; - int bitCount; - int posCount; - int syncBit; - uint16_t shiftReg; - int buffer; - int buffer2; - int buffer3; - int buff; - int samples; - int len; - enum { - SUB_NONE, - SUB_FIRST_HALF, - SUB_SECOND_HALF, - SUB_BOTH - } sub; - uint8_t *output; -} Demod; - -static RAMFUNC int ManchesterDecoding(int v) { - int bit; - int modulation; - int error = 0; - - bit = Demod.buffer; - Demod.buffer = Demod.buffer2; - Demod.buffer2 = Demod.buffer3; - Demod.buffer3 = v; - - if (Demod.buff < 3) { - Demod.buff++; - return false; - } - - if (Demod.state==DEMOD_UNSYNCD) { - Demod.output[Demod.len] = 0xfa; - Demod.syncBit = 0; - //Demod.samples = 0; - Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part - - if (bit & 0x08) { - Demod.syncBit = 0x08; - } - - if (bit & 0x04) { - if (Demod.syncBit) { - bit <<= 4; - } - Demod.syncBit = 0x04; - } - - if (bit & 0x02) { - if (Demod.syncBit) { - bit <<= 2; - } - Demod.syncBit = 0x02; - } - - if (bit & 0x01 && Demod.syncBit) { - Demod.syncBit = 0x01; - } - - if (Demod.syncBit) { - Demod.len = 0; - Demod.state = DEMOD_START_OF_COMMUNICATION; - Demod.sub = SUB_FIRST_HALF; - Demod.bitCount = 0; - Demod.shiftReg = 0; - Demod.samples = 0; - if (Demod.posCount) { - switch (Demod.syncBit) { - case 0x08: Demod.samples = 3; break; - case 0x04: Demod.samples = 2; break; - case 0x02: Demod.samples = 1; break; - case 0x01: Demod.samples = 0; break; - } - // SOF must be long burst... otherwise stay unsynced!!! - if (!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) { - Demod.state = DEMOD_UNSYNCD; - } - } else { - // SOF must be long burst... otherwise stay unsynced!!! - if (!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) { - Demod.state = DEMOD_UNSYNCD; - error = 0x88; - } - - } - error = 0; - - } - } else { - // state is DEMOD is in SYNC from here on. - modulation = bit & Demod.syncBit; - modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit; - - Demod.samples += 4; - - if (Demod.posCount == 0) { - Demod.posCount = 1; - if (modulation) { - Demod.sub = SUB_FIRST_HALF; - } else { - Demod.sub = SUB_NONE; - } - } else { - Demod.posCount = 0; - if (modulation) { - if (Demod.sub == SUB_FIRST_HALF) { - Demod.sub = SUB_BOTH; - } else { - Demod.sub = SUB_SECOND_HALF; - } - } else if (Demod.sub == SUB_NONE) { - if (Demod.state == DEMOD_SOF_COMPLETE) { - Demod.output[Demod.len] = 0x0f; - Demod.len++; - Demod.state = DEMOD_UNSYNCD; - return true; - } else { - Demod.state = DEMOD_ERROR_WAIT; - error = 0x33; - } - } - - switch(Demod.state) { - case DEMOD_START_OF_COMMUNICATION: - if (Demod.sub == SUB_BOTH) { - Demod.state = DEMOD_START_OF_COMMUNICATION2; - Demod.posCount = 1; - Demod.sub = SUB_NONE; - } else { - Demod.output[Demod.len] = 0xab; - Demod.state = DEMOD_ERROR_WAIT; - error = 0xd2; - } - break; - case DEMOD_START_OF_COMMUNICATION2: - if (Demod.sub == SUB_SECOND_HALF) { - Demod.state = DEMOD_START_OF_COMMUNICATION3; - } else { - Demod.output[Demod.len] = 0xab; - Demod.state = DEMOD_ERROR_WAIT; - error = 0xd3; - } - break; - case DEMOD_START_OF_COMMUNICATION3: - if (Demod.sub == SUB_SECOND_HALF) { - Demod.state = DEMOD_SOF_COMPLETE; - } else { - Demod.output[Demod.len] = 0xab; - Demod.state = DEMOD_ERROR_WAIT; - error = 0xd4; - } - break; - case DEMOD_SOF_COMPLETE: - case DEMOD_MANCHESTER_D: - case DEMOD_MANCHESTER_E: - // OPPOSITE FROM ISO14443 - 11110000 = 0 (1 in 14443) - // 00001111 = 1 (0 in 14443) - if (Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF - Demod.bitCount++; - Demod.shiftReg = (Demod.shiftReg >> 1) ^ 0x100; - Demod.state = DEMOD_MANCHESTER_D; - } else if (Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF - Demod.bitCount++; - Demod.shiftReg >>= 1; - Demod.state = DEMOD_MANCHESTER_E; - } else if (Demod.sub == SUB_BOTH) { - Demod.state = DEMOD_MANCHESTER_F; - } else { - Demod.state = DEMOD_ERROR_WAIT; - error = 0x55; - } - break; - - case DEMOD_MANCHESTER_F: - // Tag response does not need to be a complete byte! - if (Demod.len > 0 || Demod.bitCount > 0) { - if (Demod.bitCount > 1) { // was > 0, do not interpret last closing bit, is part of EOF - Demod.shiftReg >>= (9 - Demod.bitCount); // right align data - Demod.output[Demod.len] = Demod.shiftReg & 0xff; - Demod.len++; - } - - Demod.state = DEMOD_UNSYNCD; - return true; - } else { - Demod.output[Demod.len] = 0xad; - Demod.state = DEMOD_ERROR_WAIT; - error = 0x03; - } - break; - - case DEMOD_ERROR_WAIT: - Demod.state = DEMOD_UNSYNCD; - break; - - default: - Demod.output[Demod.len] = 0xdd; - Demod.state = DEMOD_UNSYNCD; - break; - } - - if (Demod.bitCount >= 8) { - Demod.shiftReg >>= 1; - Demod.output[Demod.len] = (Demod.shiftReg & 0xff); - Demod.len++; - Demod.bitCount = 0; - Demod.shiftReg = 0; - } - - if (error) { - Demod.output[Demod.len] = 0xBB; - Demod.len++; - Demod.output[Demod.len] = error & 0xFF; - Demod.len++; - Demod.output[Demod.len] = 0xBB; - Demod.len++; - Demod.output[Demod.len] = bit & 0xFF; - Demod.len++; - Demod.output[Demod.len] = Demod.buffer & 0xFF; - Demod.len++; - // Look harder ;-) - Demod.output[Demod.len] = Demod.buffer2 & 0xFF; - Demod.len++; - Demod.output[Demod.len] = Demod.syncBit & 0xFF; - Demod.len++; - Demod.output[Demod.len] = 0xBB; - Demod.len++; - return true; - } - - } - - } // end (state != UNSYNCED) - - return false; -} - -//============================================================================= -// Finally, a `sniffer' for iClass communication +// A `sniffer' for iClass communication // Both sides of communication! //============================================================================= - -//----------------------------------------------------------------------------- -// Record the sequence of commands sent by the reader to the tag, with -// triggering so that we start recording at the point that the tag is moved -// near the reader. -//----------------------------------------------------------------------------- -void RAMFUNC SnoopIClass(void) { - - // We won't start recording the frames that we acquire until we trigger; - // a good trigger condition to get started is probably when we see a - // response from the tag. - //int triggered = false; // false to wait first for card - - // The command (reader -> tag) that we're receiving. - // The length of a received command will in most cases be no more than 18 bytes. - // So 32 should be enough! - #define ICLASS_BUFFER_SIZE 32 - uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE]; - // The response (tag -> reader) that we're receiving. - uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE]; - - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - - // free all BigBuf memory - BigBuf_free(); - // The DMA buffer, used to stream samples from the FPGA - uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); - - set_tracing(true); - clear_trace(); - iso14a_set_trigger(false); - - int lastRxCounter; - uint8_t *upTo; - int smpl; - int maxBehindBy = 0; - - // Count of samples received so far, so that we can include timing - // information in the trace buffer. - int samples = 0; - rsamples = 0; - - // Set up the demodulator for tag -> reader responses. - Demod.output = tagToReaderResponse; - Demod.len = 0; - Demod.state = DEMOD_UNSYNCD; - - // Setup for the DMA. - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); - upTo = dmaBuf; - lastRxCounter = DMA_BUFFER_SIZE; - FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); - - // And the reader -> tag commands - memset(&Uart, 0, sizeof(Uart)); - Uart.output = readerToTagCmd; - Uart.byteCntMax = 32; // was 100 (greg)//////////////////////////////////////////////////////////////////////// - Uart.state = STATE_UNSYNCD; - - // And put the FPGA in the appropriate mode - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - - uint32_t time_0 = GetCountSspClk(); - uint32_t time_start = 0; - uint32_t time_stop = 0; - - int div = 0; - //int div2 = 0; - int decbyte = 0; - int decbyter = 0; - - // And now we loop, receiving samples. - for (;;) { - LED_A_ON(); - WDT_HIT(); - int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1); - if (behindBy > maxBehindBy) { - maxBehindBy = behindBy; - if (behindBy > (9 * DMA_BUFFER_SIZE / 10)) { - Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); - goto done; - } - } - if (behindBy < 1) continue; - - LED_A_OFF(); - smpl = upTo[0]; - upTo++; - lastRxCounter -= 1; - if (upTo - dmaBuf > DMA_BUFFER_SIZE) { - upTo -= DMA_BUFFER_SIZE; - lastRxCounter += DMA_BUFFER_SIZE; - AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo; - AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; - } - - //samples += 4; - samples += 1; - - if (smpl & 0xF) { - decbyte ^= (1 << (3 - div)); - } - - // FOR READER SIDE COMMUMICATION... - - decbyter <<= 2; - decbyter ^= (smpl & 0x30); - - div++; - - if ((div + 1) % 2 == 0) { - smpl = decbyter; - if (OutOfNDecoding((smpl & 0xF0) >> 4)) { - rsamples = samples - Uart.samples; - time_stop = (GetCountSspClk()-time_0) << 4; - LED_C_ON(); - - //if (!LogTrace(Uart.output, Uart.byteCnt, rsamples, Uart.parityBits,true)) break; - //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); - - /* And ready to receive another command. */ - Uart.state = STATE_UNSYNCD; - /* And also reset the demod code, which might have been */ - /* false-triggered by the commands from the reader. */ - Demod.state = DEMOD_UNSYNCD; - LED_B_OFF(); - Uart.byteCnt = 0; - } else { - time_start = (GetCountSspClk()-time_0) << 4; - } - decbyter = 0; - } - - if (div > 3) { - smpl = decbyte; - if (ManchesterDecoding(smpl & 0x0F)) { - time_stop = (GetCountSspClk()-time_0) << 4; - - rsamples = samples - Demod.samples; - LED_B_ON(); - - uint8_t parity[MAX_PARITY_SIZE]; - GetParity(Demod.output, Demod.len, parity); - LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, false); - - // And ready to receive another response. - memset(&Demod, 0, sizeof(Demod)); - Demod.output = tagToReaderResponse; - Demod.state = DEMOD_UNSYNCD; - LED_C_OFF(); - } else { - time_start = (GetCountSspClk()-time_0) << 4; - } - - div = 0; - decbyte = 0x00; - } - - if (BUTTON_PRESS()) { - DbpString("cancelled_a"); - goto done; - } - } - - DbpString("COMMAND FINISHED"); - - Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); - Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); - -done: - AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; - Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); - Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); - LEDsoff(); +void SnoopIClass(uint8_t jam_search_len, uint8_t *jam_search_string) { + SnoopIso15693(jam_search_len, jam_search_string); } + void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { int i; for (i = 0; i < 8; i++) { @@ -756,20 +88,15 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { } } + // Encode SOF only static void CodeIClassTagSOF() { - //So far a dummy implementation, not used - //int lastProxToAirDuration =0; - ToSendReset(); - // Send SOF ToSend[++ToSendMax] = 0x1D; -// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning - - // Convert from last byte pos to length ToSendMax++; } + static void AppendCrc(uint8_t *data, int len) { ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1); } @@ -783,15 +110,20 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // free eventually allocated BigBuf memory BigBuf_free_keep_EM(); - State cipher_state; + uint16_t page_size = 32 * 8; + uint8_t current_page = 0; + + // maintain cipher states for both credit and debit key for each page + State cipher_state_KC[8]; + State cipher_state_KD[8]; + State *cipher_state = &cipher_state_KD[0]; uint8_t *emulator = BigBuf_get_EM_addr(); uint8_t *csn = emulator; - uint8_t sof_data[] = { 0x0F } ; // CSN followed by two CRC bytes - uint8_t anticoll_data[10] = { 0 }; - uint8_t csn_data[10] = { 0 }; + uint8_t anticoll_data[10]; + uint8_t csn_data[10]; memcpy(csn_data, csn, sizeof(csn_data)); Dbprintf("Simulating 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]); @@ -802,24 +134,57 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { AppendCrc(anticoll_data, 8); AppendCrc(csn_data, 8); - uint8_t diversified_key[8] = { 0 }; + uint8_t diversified_key_d[8] = { 0x00 }; + uint8_t diversified_key_c[8] = { 0x00 }; + uint8_t *diversified_key = diversified_key_d; + + // configuration block + uint8_t conf_block[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; + // e-Purse uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; - //uint8_t card_challenge_data[8] = { 0 }; + if (simulationMode == ICLASS_SIM_MODE_FULL) { - // The diversified key should be stored on block 3 - // Get the diversified key from emulator memory - memcpy(diversified_key, emulator + (8 * 3), 8); - // Card challenge, a.k.a e-purse is on block 2 - memcpy(card_challenge_data, emulator + (8 * 2), 8); - // Precalculate the cipher state, feeding it the CC - cipher_state = opt_doTagMAC_1(card_challenge_data, diversified_key); + // initialize from page 0 + memcpy(conf_block, emulator + 8 * 1, 8); + memcpy(card_challenge_data, emulator + 8 * 2, 8); // e-purse + memcpy(diversified_key_d, emulator + 8 * 3, 8); // Kd + memcpy(diversified_key_c, emulator + 8 * 4, 8); // Kc } + + AppendCrc(conf_block, 8); + // save card challenge for sim2,4 attack if (reader_mac_buf != NULL) { memcpy(reader_mac_buf, card_challenge_data, 8); } + if (conf_block[5] & 0x80) { + page_size = 256 * 8; + } + + // From PicoPass DS: + // When the page is in personalization mode this bit is equal to 1. + // Once the application issuer has personalized and coded its dedicated areas, this bit must be set to 0: + // the page is then "in application mode". + bool personalization_mode = conf_block[7] & 0x80; + + // chip memory may be divided in 8 pages + uint8_t max_page = conf_block[4] & 0x10 ? 0 : 7; + + // Precalculate the cipher states, feeding it the CC + cipher_state_KD[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KC[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + for (int i = 1; i < max_page; i++) { + uint8_t *epurse = emulator + i*page_size + 8*2; + uint8_t *Kd = emulator + i*page_size + 8*3; + uint8_t *Kc = emulator + i*page_size + 8*4; + cipher_state_KD[i] = opt_doTagMAC_1(epurse, Kd); + cipher_state_KC[i] = opt_doTagMAC_1(epurse, Kc); + } + } + int exitLoop = 0; // Reader 0a // Tag 0f @@ -834,7 +199,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { int trace_data_size = 0; // Respond SOF -- takes 1 bytes - uint8_t *resp_sof = BigBuf_malloc(2); + uint8_t *resp_sof = BigBuf_malloc(1); int resp_sof_Len; // Anticollision CSN (rotated CSN) @@ -850,8 +215,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // configuration (block 1) picopass 2ks uint8_t *resp_conf = BigBuf_malloc(22); int resp_conf_len; - uint8_t conf_data[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; - AppendCrc(conf_data, 8); // e-Purse (block 2) // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) @@ -874,7 +237,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { int len; // Prepare card messages - ToSendMax = 0; // First card answer: SOF only CodeIClassTagSOF(); @@ -892,7 +254,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { resp_csn_len = ToSendMax; // Configuration (block 1) - CodeIso15693AsTag(conf_data, sizeof(conf_data)); + CodeIso15693AsTag(conf_block, sizeof(conf_block)); memcpy(resp_conf, ToSend, ToSendMax); resp_conf_len = ToSendMax; @@ -915,16 +277,11 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2); - LED_A_ON(); bool buttonPressed = false; enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE; while (!exitLoop) { WDT_HIT(); - LED_B_OFF(); - //Signal tracer - // Can be used to get a trigger for an oscilloscope.. - LED_C_OFF(); uint32_t reader_eof_time = 0; len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time); @@ -933,9 +290,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { break; } - //Signal tracer - LED_C_ON(); - // Now look at the reader command and provide appropriate responses // default is no response: modulated_response = NULL; @@ -948,8 +302,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { if (chip_state != HALTED) { modulated_response = resp_sof; modulated_response_size = resp_sof_Len; - trace_data = sof_data; - trace_data_size = sizeof(sof_data); chip_state = ACTIVATED; } @@ -1001,8 +353,8 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { case 1: // configuration (block 01) modulated_response = resp_conf; modulated_response_size = resp_conf_len; - trace_data = conf_data; - trace_data_size = sizeof(conf_data); + trace_data = conf_block; + trace_data_size = sizeof(conf_block); break; case 2: // e-purse (block 02) modulated_response = resp_cc; @@ -1036,7 +388,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { trace_data = ff_data; trace_data_size = sizeof(ff_data); } else { // use data from emulator memory - memcpy(data_generic_trace, emulator + 8*blockNo, 8); + memcpy(data_generic_trace, emulator + current_page*page_size + 8*blockNo, 8); AppendCrc(data_generic_trace, 8); trace_data = data_generic_trace; trace_data_size = 10; @@ -1049,22 +401,29 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD - || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && len == 2) { + || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && receivedCmd[1] == 0x02 && len == 2) { // Read e-purse (88 02 || 18 02) if (chip_state == SELECTED) { + if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD){ + cipher_state = &cipher_state_KD[current_page]; + diversified_key = diversified_key_d; + } else { + cipher_state = &cipher_state_KC[current_page]; + diversified_key = diversified_key_c; + } modulated_response = resp_cc; modulated_response_size = resp_cc_len; trace_data = card_challenge_data; trace_data_size = sizeof(card_challenge_data); - LED_B_ON(); } - } else if (receivedCmd[0] == ICLASS_CMD_CHECK && len == 9) { + } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC + || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) { // Reader random and reader MAC!!! if (chip_state == SELECTED) { if (simulationMode == ICLASS_SIM_MODE_FULL) { //NR, from reader, is in receivedCmd+1 - opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key); + opt_doTagMAC_2(*cipher_state, receivedCmd+1, data_generic_trace, diversified_key); trace_data = data_generic_trace; trace_data_size = 4; CodeIso15693AsTag(trace_data, trace_data_size); @@ -1087,13 +446,16 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { if (chip_state == SELECTED) { // Reader ends the session + modulated_response = resp_sof; + modulated_response_size = resp_sof_Len; chip_state = HALTED; } } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06 //Read 4 blocks if (chip_state == SELECTED) { - memcpy(data_generic_trace, emulator + (receivedCmd[1] << 3), 8 * 4); + uint8_t blockNo = receivedCmd[1]; + memcpy(data_generic_trace, emulator + current_page*page_size + blockNo*8, 8 * 4); AppendCrc(data_generic_trace, 8 * 4); trace_data = data_generic_trace; trace_data_size = 8 * 4 + 2; @@ -1104,11 +466,47 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) { - // Probably the reader wants to update the nonce. Let's just ignore that for now. - // 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 if (chip_state == SELECTED) { + uint8_t blockNo = receivedCmd[1]; + if (blockNo == 2) { // update e-purse + memcpy(card_challenge_data, receivedCmd+2, 8); + CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); + memcpy(resp_cc, ToSend, ToSendMax); + resp_cc_len = ToSendMax; + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + memcpy(emulator + current_page*page_size + 8*2, card_challenge_data, 8); + } + } else if (blockNo == 3) { // update Kd + for (int i = 0; i < 8; i++) { + if (personalization_mode) { + diversified_key_d[i] = receivedCmd[2 + i]; + } else { + diversified_key_d[i] ^= receivedCmd[2 + i]; + } + } + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + memcpy(emulator + current_page*page_size + 8*3, diversified_key_d, 8); + } + } else if (blockNo == 4) { // update Kc + for (int i = 0; i < 8; i++) { + if (personalization_mode) { + diversified_key_c[i] = receivedCmd[2 + i]; + } else { + diversified_key_c[i] ^= receivedCmd[2 + i]; + } + } + cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + memcpy(emulator + current_page*page_size + 8*4, diversified_key_c, 8); + } + } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block + memcpy(emulator + current_page*page_size + 8*blockNo, receivedCmd+2, 8); + } memcpy(data_generic_trace, receivedCmd + 2, 8); AppendCrc(data_generic_trace, 8); trace_data = data_generic_trace; @@ -1121,11 +519,24 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) { // Pagesel + // Chips with a single page will not answer to this command + // Otherwise, we should answer 8bytes (conf block 1) + 2bytes CRC if (chip_state == SELECTED) { - // Pagesel enables to select a page in the selected chip memory and return its configuration block - // Chips with a single page will not answer to this command - // It appears we're fine ignoring this. - // Otherwise, we should answer 8bytes (block) + 2bytes CRC + if (simulationMode == ICLASS_SIM_MODE_FULL && max_page > 0) { + current_page = receivedCmd[1]; + memcpy(data_generic_trace, emulator + current_page*page_size + 8*1, 8); + memcpy(diversified_key_d, emulator + current_page*page_size + 8*3, 8); + memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8); + cipher_state = &cipher_state_KD[current_page]; + personalization_mode = data_generic_trace[7] & 0x80; + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } } } else if (receivedCmd[0] == 0x26 && len == 5) { @@ -1143,20 +554,16 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } /** - A legit tag has about 311,5us delay between reader EOT and tag SOF. + 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_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); + uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM; + TransmitTo15693Reader(modulated_response, modulated_response_size, &response_time, 0, false); + LogTrace_ISO15693(trace_data, trace_data_size, response_time*32, response_time*32 + modulated_response_size/2, NULL, false); } } - LED_A_OFF(); - LED_B_OFF(); - LED_C_OFF(); - if (buttonPressed) { DbpString("Button pressed"); @@ -1177,6 +584,9 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { * @param datain */ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) { + + LED_A_ON(); + uint32_t simType = arg0; uint32_t numberOfCSNS = arg1; @@ -1184,6 +594,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain FpgaDownloadAndGo(FPGA_BITSTREAM_HF); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); + LED_D_OFF(); FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); StartCountSspClk(); @@ -1234,221 +645,31 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain // That will speed things up a little, but not required just yet. Dbprintf("The mode is not implemented, reserved for future use"); } + Dbprintf("Done..."); + LED_A_OFF(); } /// 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; - - 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(); - } - } +static void ReaderTransmitIClass(uint8_t *frame, int len, uint32_t *start_time) { - 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; -} - - -//----------------------------------------------------------------------------- -// 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] = 0xf0; - } 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++; + 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); } -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 timeout, 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, timeout, eof_time)) { return true; } } @@ -1456,181 +677,129 @@ static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint } /** - * @brief Talks to an iclass tag, sends the commands to get CSN and CC. - * @param card_data where the CSN and CC are stored for return - * @return 0 = fail - * 1 = Got CSN - * 2 = Got CSN and CC + * @brief Selects an iclass tag + * @param card_data where the CSN is stored for return + * @return false = fail + * true = success */ -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 }; - if (use_credit_key) - readcheck_cc[0] = 0x18; - else - readcheck_cc[0] = 0x88; +static bool selectIclassTag(uint8_t *card_data, 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 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 false;//Fail + //Send Identify - ReaderTransmitIClass(identify, 1); + start_time = *eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + ReaderTransmitIClass(identify, 1, &start_time); //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC - uint8_t len = ReaderReceiveIClass(resp); - if (len != 10) return read_status;//Fail + uint8_t len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time); + if (len != 10) return false;//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); - if (len != 10) return read_status;//Fail + len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time); + if (len != 10) return false;//Fail - //Success - level 1, we got CSN + //Success - we got CSN //Save CSN in response data memcpy(card_data, resp, 8); - //Flag that we got to at least stage 1, read CSN - 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) { - //Save CC (e-purse) in response data - memcpy(card_data+8, resp, 8); - read_status++; - } - - return read_status; + return true; } -static uint8_t handshakeIclassTag(uint8_t *card_data) { - return handshakeIclassTag_ext(card_data, false); -} +// Select an iClass tag and read all blocks which are always readable without authentication +void ReaderIClass(uint8_t flags) { -// Reader iClass Anticollission -void ReaderIClass(uint8_t arg0) { + LED_A_ON(); uint8_t card_data[6 * 8] = {0}; memset(card_data, 0xFF, sizeof(card_data)); - uint8_t last_csn[8] = {0,0,0,0,0,0,0,0}; uint8_t resp[ICLASS_BUFFER_SIZE]; - memset(resp, 0xFF, sizeof(resp)); //Read conf block CRC(0x01) => 0xfa 0x22 - uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x01, 0xfa, 0x22}; + uint8_t readConf[] = {ICLASS_CMD_READ_OR_IDENTIFY, 0x01, 0xfa, 0x22}; + //Read e-purse block CRC(0x02) => 0x61 0x10 + uint8_t readEpurse[] = {ICLASS_CMD_READ_OR_IDENTIFY, 0x02, 0x61, 0x10}; //Read App Issuer Area block CRC(0x05) => 0xde 0x64 - uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x05, 0xde, 0x64}; + uint8_t readAA[] = {ICLASS_CMD_READ_OR_IDENTIFY, 0x05, 0xde, 0x64}; - int read_status= 0; uint8_t result_status = 0; - // flag to read until one tag is found successfully - bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; - // flag to only try 5 times to find one tag then return - bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY; - // if neither abort_after_read nor try_once then continue reading until button pressed. - - bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY; - // test flags for what blocks to be sure to read - uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF; - uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC; - uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA; - set_tracing(true); - setupIclassReader(); + if (flags & FLAG_ICLASS_READER_INIT) { + Iso15693InitReader(); + } - uint16_t tryCnt = 0; - bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); - while (!userCancelled) { - // if only looking for one card try 2 times if we missed it the first time - if (try_once && tryCnt > 2) { - break; - } - tryCnt++; - if (!get_tracing()) { - DbpString("Trace full"); - break; - } - WDT_HIT(); + if (flags & FLAG_ICLASS_READER_CLEARTRACE) { + set_tracing(true); + clear_trace(); + StartCountSspClk(); + } - read_status = handshakeIclassTag_ext(card_data, use_credit_key); - - 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; - - // 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)) { - result_status |= FLAG_ICLASS_READER_CONF; - memcpy(card_data+8, resp, 8); - } else { - Dbprintf("Failed to dump config block"); - } - } + uint32_t start_time = 0; + uint32_t eof_time = 0; - //Read block 5, AA - if (flagReadAA) { - if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10)) { - result_status |= FLAG_ICLASS_READER_AA; - memcpy(card_data + (8*5), resp, 8); - } else { - //Dbprintf("Failed to dump AA block"); - } - } + if (selectIclassTag(resp, &eof_time)) { + result_status = FLAG_ICLASS_READER_CSN; + memcpy(card_data, resp, 8); + } - // 0 : CSN - // 1 : Configuration - // 2 : e-purse - // 3 : kd / debit / aa2 (write-only) - // 4 : kc / credit / aa1 (write-only) - // 5 : AIA, Application issuer area - //Then we can 'ship' back the 6 * 8 bytes of data, - // with 0xFF:s in block 3 and 4. - - LED_B_ON(); - //Send back to client, but don't bother if we already sent this - - // only useful if looping in arm (not try_once && not abort_after_read) - if (memcmp(last_csn, card_data, 8) != 0) { - // If caller requires that we get Conf, CC, AA, continue until we got it - if ( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) { - cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data)); - if (abort_after_read) { - LED_A_OFF(); - LED_B_OFF(); - return; - } - //Save that we already sent this.... - memcpy(last_csn, card_data, 8); - } + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + //Read block 1, config + if (flags & FLAG_ICLASS_READER_CONF) { + if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, sizeof(resp), 10, 10, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) { + result_status |= FLAG_ICLASS_READER_CONF; + memcpy(card_data+8, resp, 8); + } else { + Dbprintf("Failed to read config block"); } - LED_B_OFF(); - userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; } - if (userCancelled) { - cmd_send(CMD_ACK, 0xFF, 0, 0, card_data, 0); - } else { - cmd_send(CMD_ACK, 0, 0, 0, card_data, 0); + + //Read block 2, e-purse + if (flags & FLAG_ICLASS_READER_CC) { + if (sendCmdGetResponseWithRetries(readEpurse, sizeof(readEpurse), resp, sizeof(resp), 10, 10, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) { + result_status |= FLAG_ICLASS_READER_CC; + memcpy(card_data + (8*2), resp, 8); + } else { + Dbprintf("Failed to read e-purse"); + } + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; } + + //Read block 5, AA + if (flags & FLAG_ICLASS_READER_AA) { + if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, sizeof(resp), 10, 10, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) { + result_status |= FLAG_ICLASS_READER_AA; + memcpy(card_data + (8*5), resp, 8); + } else { + Dbprintf("Failed to read AA block"); + } + } + + cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data)); + LED_A_OFF(); } + void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { + LED_A_ON(); + + bool use_credit_key = false; uint8_t card_data[USB_CMD_DATA_SIZE]={0}; uint16_t block_crc_LUT[255] = {0}; @@ -1641,6 +810,9 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { } //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]); + uint8_t readcheck_cc[] = { ICLASS_CMD_READCHECK_KD, 0x02 }; + if (use_credit_key) + readcheck_cc[0] = ICLASS_CMD_READCHECK_KC; uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 }; @@ -1658,8 +830,13 @@ 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()) { @@ -1670,13 +847,16 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { break; } - uint8_t read_status = handshakeIclassTag(card_data); - if (read_status < 2) continue; + if (!selectIclassTag(card_data, &eof_time)) continue; + + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + if (!sendCmdGetResponseWithRetries(readcheck_cc, sizeof(readcheck_cc), resp, sizeof(resp), 8, 3, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) continue; - //for now replay captured auth (as cc not updated) + // replay captured auth (cc must not have been updated) memcpy(check+5, MAC, 4); - if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 5)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 5, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) { Dbprintf("Error: Authentication Fail!"); continue; } @@ -1687,7 +867,9 @@ 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)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + if (!sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; Dbprintf("Dump config (block 1) failed"); continue; } @@ -1712,7 +894,8 @@ 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)) { + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; + if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, ICLASS_READER_TIMEOUT_OTHERS, &eof_time)) { Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x", block, resp[0], resp[1], resp[2], resp[3], resp[4], resp[5], @@ -1760,119 +943,127 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { card_data, 0); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); LED_A_OFF(); } -void iClass_ReadCheck(uint8_t blockNo, uint8_t keyType) { - uint8_t readcheck[] = { keyType, blockNo }; - uint8_t resp[] = {0,0,0,0,0,0,0,0}; - size_t isOK = 0; - isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 6); - cmd_send(CMD_ACK,isOK, 0, 0, 0, 0); -} -void iClass_Authentication(uint8_t *MAC) { - uint8_t check[] = { ICLASS_CMD_CHECK, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - uint8_t resp[ICLASS_BUFFER_SIZE]; +void iClass_Check(uint8_t *MAC) { + uint8_t check[9] = {ICLASS_CMD_CHECK_KD, 0x00}; + uint8_t resp[4]; memcpy(check+5, MAC, 4); - bool isOK; - isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6); - cmd_send(CMD_ACK,isOK, 0, 0, 0, 0); + uint32_t eof_time; + bool isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 6, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time); + cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp)); +} + + +void iClass_Readcheck(uint8_t block, bool use_credit_key) { + uint8_t readcheck[2] = {ICLASS_CMD_READCHECK_KD, block}; + if (use_credit_key) { + readcheck[0] = ICLASS_CMD_READCHECK_KC; + } + uint8_t resp[8]; + uint32_t eof_time; + bool isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 8, 6, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time); + cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp)); } -bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) { + +static bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) { uint8_t readcmd[] = {ICLASS_CMD_READ_OR_IDENTIFY, blockNo, 0x00, 0x00}; //0x88, 0x00 // can i use 0C? char bl = blockNo; 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}; - bool isOK = false; + uint8_t resp[10]; + uint32_t eof_time; - //readcmd[1] = blockNo; - isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10); + bool isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, sizeof(resp), 10, 10, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time); memcpy(readdata, resp, sizeof(resp)); return isOK; } + void iClass_ReadBlk(uint8_t blockno) { + + LED_A_ON(); + uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; - bool isOK = false; - isOK = iClass_ReadBlock(blockno, readblockdata); + bool isOK = iClass_ReadBlock(blockno, readblockdata); cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); + + LED_A_OFF(); } -void iClass_Dump(uint8_t blockno, uint8_t numblks) { - uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; + +void iClass_Dump(uint8_t startblock, uint8_t numblks) { + + LED_A_ON(); + + uint8_t readblockdata[USB_CMD_DATA_SIZE+2] = {0}; bool isOK = false; - uint8_t blkCnt = 0; - - BigBuf_free(); - uint8_t *dataout = BigBuf_malloc(255*8); - if (dataout == NULL) { - Dbprintf("out of memory"); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LED_D_OFF(); - cmd_send(CMD_ACK, 0, 1, 0, 0, 0); - LED_A_OFF(); - return; + uint16_t blkCnt = 0; + + if (numblks > USB_CMD_DATA_SIZE / 8) { + numblks = USB_CMD_DATA_SIZE / 8; } - memset(dataout, 0xFF, 255*8); - - for ( ; blkCnt < numblks; blkCnt++) { - isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); - if (!isOK || (readblockdata[0] == 0xBB || readblockdata[7] == 0xBB || readblockdata[2] == 0xBB)) { //try again - isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); - if (!isOK) { - Dbprintf("Block %02X failed to read", blkCnt+blockno); - break; - } + + for (blkCnt = 0; blkCnt < numblks; blkCnt++) { + isOK = iClass_ReadBlock(startblock+blkCnt, readblockdata+8*blkCnt); + if (!isOK) { + Dbprintf("Block %02X failed to read", startblock+blkCnt); + break; } - memcpy(dataout + (blkCnt*8), readblockdata, 8); } - //return pointer to dump memory in arg3 - cmd_send(CMD_ACK, isOK, blkCnt, BigBuf_max_traceLen(), 0, 0); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LEDsoff(); - BigBuf_free(); + + cmd_send(CMD_ACK, isOK, blkCnt, 0, readblockdata, blkCnt*8); + + LED_A_OFF(); } + static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) { - uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - //uint8_t readblockdata[10]; - //write[1] = blockNo; + + uint8_t write[16] = {ICLASS_CMD_UPDATE, blockNo}; memcpy(write+2, data, 12); // data + mac - char *wrCmd = (char *)(write+1); - 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}; + AppendCrc(write+1, 13); + uint8_t resp[10]; bool isOK = false; + uint32_t eof_time = 0; - isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); - 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, 0, ICLASS_READER_TIMEOUT_UPDATE, &eof_time); + if (isOK && blockNo != 3 && blockNo != 4 && memcmp(write+2, resp, 8)) { // check response + isOK = false; } + return isOK; } + void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) { + + LED_A_ON(); + bool isOK = iClass_WriteBlock_ext(blockNo, data); - if (isOK){ + if (isOK) { Dbprintf("Write block [%02x] successful", blockNo); } else { Dbprintf("Write block [%02x] failed", blockNo); } cmd_send(CMD_ACK, isOK, 0, 0, 0, 0); + + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); + + LED_A_OFF(); } + void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) { int i; int written = 0; @@ -1898,5 +1089,6 @@ void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) { cmd_send(CMD_ACK, 1, 0, 0, 0, 0); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LEDsoff(); + LED_D_OFF(); + LED_A_OFF(); }