X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e55b441992629938fecd75693d204dd98831d3ba..01aa068b6ff34d86dd5d9d9e962aba20cd490050:/armsrc/iclass.c?ds=sidebyside diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 1a729f3f..afe1a607 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -3,6 +3,7 @@ // Hagen Fritsch - June 2010 // Gerhard de Koning Gans - May 2011 // Gerhard de Koning Gans - June 2012 - Added iClass card and reader emulation +// piwi - 2019 // // This code is licensed to you under the terms of the GNU GPL, version 2 or, // at your option, any later version. See the LICENSE.txt file for the text of @@ -10,31 +11,10 @@ //----------------------------------------------------------------------------- // Routines to support iClass. //----------------------------------------------------------------------------- -// Based on ISO14443a implementation. Still in experimental phase. // Contribution made during a security research at Radboud University Nijmegen // // Please feel free to contribute and extend iClass support!! //----------------------------------------------------------------------------- -// -// FIX: -// ==== -// We still have sometimes a demodulation error when snooping iClass communication. -// The resulting trace of a read-block-03 command may look something like this: -// -// + 22279: : 0c 03 e8 01 -// -// ...with an incorrect answer... -// -// + 85: 0: TAG ff! ff! ff! ff! ff! ff! ff! ff! bb 33 bb 00 01! 0e! 04! bb !crc -// -// We still left the error signalling bytes in the traces like 0xbb -// -// A correct trace should look like this: -// -// + 21112: : 0c 03 e8 01 -// + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5 -// -//----------------------------------------------------------------------------- #include "iclass.h" @@ -44,7 +24,7 @@ #include "string.h" #include "printf.h" #include "common.h" -#include "cmd.h" +#include "usb_cdc.h" #include "iso14443a.h" #include "iso15693.h" // Needed for CRC in emulation mode; @@ -54,7 +34,6 @@ #include "iso15693tools.h" #include "protocols.h" #include "optimized_cipher.h" -#include "usb_cdc.h" // for usb_poll_validate_length #include "fpgaloader.h" // iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after @@ -66,695 +45,21 @@ #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 +#define ICLASS_BUFFER_SIZE 34 // we expect max 34 bytes as tag answer (response to READ4) -//----------------------------------------------------------------------------- -// 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; - } - } - - 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; - - //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_ISO15693(Uart.output, Uart.byteCnt, time_start*32, time_stop*32, 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; - 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; - - uint8_t parity[MAX_PARITY_SIZE]; - GetParity(Demod.output, Demod.len, parity); - 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)); - Demod.output = tagToReaderResponse; - Demod.state = DEMOD_UNSYNCD; - } 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++) { @@ -762,6 +67,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { } } + // Encode SOF only static void CodeIClassTagSOF() { ToSendReset(); @@ -769,6 +75,7 @@ static void CodeIClassTagSOF() { ToSendMax++; } + static void AppendCrc(uint8_t *data, int len) { ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1); } @@ -1338,16 +645,17 @@ static void ReaderTransmitIClass(uint8_t *frame, int len, uint32_t *start_time) 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) { + uint8_t expected_size, uint8_t tries, uint32_t start_time, uint32_t timeout, uint32_t *eof_time) { + while (tries-- > 0) { ReaderTransmitIClass(command, cmdsize, &start_time); - if (expected_size == GetIso15693AnswerFromTag(resp, max_resp_size, ICLASS_READER_TIMEOUT_OTHERS, eof_time)) { + if (expected_size == GetIso15693AnswerFromTag(resp, max_resp_size, timeout, eof_time)) { return true; } } return false;//Error } + /** * @brief Selects an iclass tag * @param card_data where the CSN is stored for return @@ -1366,14 +674,14 @@ static bool selectIclassTag(uint8_t *card_data, uint32_t *eof_time) { // Send act_all ReaderTransmitIClass(act_all, 1, &start_time); // Card present? - if (GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_ACTALL, eof_time) < 0) return false;//Fail + if (GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_ACTALL, eof_time) < 0) return false; //Fail //Send Identify 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 = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time); - if (len != 10) return false;//Fail + if (len != 10) return false; //Fail //Copy the Anti-collision CSN to our select-packet memcpy(&select[1], resp, 8); @@ -1382,7 +690,7 @@ static bool selectIclassTag(uint8_t *card_data, uint32_t *eof_time) { ReaderTransmitIClass(select, sizeof(select), &start_time); //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time); - if (len != 10) return false;//Fail + if (len != 10) return false; //Fail //Success - we got CSN //Save CSN in response data @@ -1393,7 +701,7 @@ static bool selectIclassTag(uint8_t *card_data, uint32_t *eof_time) { // Select an iClass tag and read all blocks which are always readable without authentication -void ReaderIClass(uint8_t arg0) { +void ReaderIClass(uint8_t flags) { LED_A_ON(); @@ -1409,224 +717,70 @@ void ReaderIClass(uint8_t arg0) { uint8_t result_status = 0; - // 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; + if (flags & FLAG_ICLASS_READER_INIT) { + Iso15693InitReader(); + } - set_tracing(true); - clear_trace(); - Iso15693InitReader(); + if (flags & FLAG_ICLASS_READER_CLEARTRACE) { + set_tracing(true); + clear_trace(); + StartCountSspClk(); + } - StartCountSspClk(); uint32_t start_time = 0; uint32_t eof_time = 0; if (selectIclassTag(resp, &eof_time)) { result_status = FLAG_ICLASS_READER_CSN; memcpy(card_data, resp, 8); - } - - start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; - - //Read block 1, config - if (flagReadConfig) { - 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 read config block"); - } - start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; - } - - //Read block 2, e-purse - if (flagReadCC) { - if (sendCmdGetResponseWithRetries(readEpurse, sizeof(readEpurse), resp, sizeof(resp), 10, 10, start_time, &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 (flagReadAA) { - 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 { - 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}; - - //Generate a lookup table for block crc - for (int block = 0; block < 255; block++){ - char bl = block; - block_crc_LUT[block] = iclass_crc16(&bl ,1); - } - //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 }; - - uint16_t crc = 0; - uint8_t cardsize = 0; - uint8_t mem = 0; - - static struct memory_t { - int k16; - int book; - int k2; - int lockauth; - int keyaccess; - } memory; - - uint8_t resp[ICLASS_BUFFER_SIZE]; - - set_tracing(true); - clear_trace(); - Iso15693InitReader(); - - StartCountSspClk(); - uint32_t start_time = 0; - uint32_t eof_time = 0; - - while (!BUTTON_PRESS()) { - - WDT_HIT(); - - if (!get_tracing()) { - DbpString("Trace full"); - break; - } - - 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, &eof_time)) continue; - // replay captured auth (cc must not have been updated) - memcpy(check+5, MAC, 4); - - start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; - if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 5, start_time, &eof_time)) { - Dbprintf("Error: Authentication Fail!"); - continue; - } - - //first get configuration block (block 1) - crc = block_crc_LUT[1]; - read[1] = 1; - read[2] = crc >> 8; - read[3] = crc & 0xff; - - start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; - if (!sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, &eof_time)) { + //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"); + } start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; - Dbprintf("Dump config (block 1) failed"); - continue; } - mem = resp[5]; - memory.k16 = (mem & 0x80); - memory.book = (mem & 0x20); - memory.k2 = (mem & 0x8); - memory.lockauth = (mem & 0x2); - memory.keyaccess = (mem & 0x1); - - cardsize = memory.k16 ? 255 : 32; - WDT_HIT(); - //Set card_data to all zeroes, we'll fill it with data - memset(card_data, 0x0, USB_CMD_DATA_SIZE); - uint8_t failedRead = 0; - uint32_t stored_data_length = 0; - //then loop around remaining blocks - for (int block = 0; block < cardsize; block++) { - read[1] = block; - crc = block_crc_LUT[block]; - read[2] = crc >> 8; - read[3] = crc & 0xff; - - start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; - if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, &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], - resp[6], resp[7]); - - //Fill up the buffer - memcpy(card_data+stored_data_length, resp, 8); - stored_data_length += 8; - if (stored_data_length +8 > USB_CMD_DATA_SIZE) { - //Time to send this off and start afresh - cmd_send(CMD_ACK, - stored_data_length,//data length - failedRead,//Failed blocks? - 0,//Not used ATM - card_data, stored_data_length); - //reset - stored_data_length = 0; - failedRead = 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 { - failedRead = 1; - stored_data_length += 8;//Otherwise, data becomes misaligned - Dbprintf("Failed to dump block %d", block); + Dbprintf("Failed to read e-purse"); } + start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER; } - //Send off any remaining data - if (stored_data_length > 0) { - cmd_send(CMD_ACK, - stored_data_length,//data length - failedRead,//Failed blocks? - 0,//Not used ATM - card_data, - stored_data_length); + //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"); + } } - //If we got here, let's break - break; } - //Signal end of transmission - cmd_send(CMD_ACK, - 0,//data length - 0,//Failed blocks? - 0,//Not used ATM - card_data, - 0); + + cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data)); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LED_D_OFF(); LED_A_OFF(); } -void iClass_Check(uint8_t *MAC) { - uint8_t check[9] = {ICLASS_CMD_CHECK_KD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; +void iClass_Check(uint8_t *NRMAC) { + uint8_t check[9] = {ICLASS_CMD_CHECK_KD, 0x00}; uint8_t resp[4]; - memcpy(check+5, MAC, 4); + memcpy(check+1, NRMAC, 8); uint32_t eof_time; - bool isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 6, 0, &eof_time); + bool isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 3, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time); cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp)); } @@ -1638,22 +792,21 @@ void iClass_Readcheck(uint8_t block, bool use_credit_key) { } uint8_t resp[8]; uint32_t eof_time; - bool isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 8, 6, 0, &eof_time); + bool isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 8, 3, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time); cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp)); } 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; + uint8_t bl = blockNo; uint16_t rdCrc = iclass_crc16(&bl, 1); readcmd[2] = rdCrc >> 8; readcmd[3] = rdCrc & 0xff; uint8_t resp[10]; - bool isOK = false; uint32_t eof_time; - isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, sizeof(resp), 10, 10, 0, &eof_time); + 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; @@ -1664,53 +817,40 @@ 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); - cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8); + uint8_t readblockdata[10]; + bool isOK = iClass_ReadBlock(blockno, readblockdata); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_D_OFF(); + cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8); LED_A_OFF(); } -void iClass_Dump(uint8_t blockno, uint8_t numblks) { + +void iClass_Dump(uint8_t startblock, uint8_t numblks) { LED_A_ON(); - uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; + 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); LED_D_OFF(); - BigBuf_free(); + + cmd_send(CMD_ACK, isOK, blkCnt, 0, readblockdata, blkCnt*8); LED_A_OFF(); } @@ -1718,35 +858,34 @@ void iClass_Dump(uint8_t blockno, uint8_t numblks) { static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) { - LED_A_ON(); - - 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; + 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, 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, 10, start_time, &eof_time); - } + isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10, 3, 0, ICLASS_READER_TIMEOUT_UPDATE, &eof_time); + if (!isOK) { + return false; + } + + uint8_t all_ff[8] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; + if (blockNo == 2) { + if (memcmp(data+4, resp, 4) || memcmp(data, resp+4, 4)) { // check response. e-purse update swaps first and second half + return false; + } + } else if (blockNo == 3 || blockNo == 4) { + if (memcmp(all_ff, resp, 8)) { // check response. Key updates always return 0xffffffffffffffff + return false; + } + } else { + if (memcmp(data, resp, 8)) { // check response. All other updates return unchanged data + return false; } } - LED_A_OFF(); - - return isOK; + return true; } @@ -1755,44 +894,44 @@ 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(); + cmd_send(CMD_ACK, isOK, 0, 0, 0, 0); LED_A_OFF(); } + void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) { - int i; + + LED_A_ON(); + int written = 0; - int total_block = (endblock - startblock) + 1; - for (i = 0; i < total_block; i++) { + int total_blocks = (endblock - startblock) + 1; + + for (uint8_t block = startblock; block <= endblock; block++) { // block number - if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){ - Dbprintf("Write block [%02x] successful", i + startblock); + if (iClass_WriteBlock_ext(block, data + (block-startblock)*12)) { + Dbprintf("Write block [%02x] successful", block); written++; } else { - if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){ - Dbprintf("Write block [%02x] successful", i + startblock); - written++; - } else { - Dbprintf("Write block [%02x] failed", i + startblock); - } + Dbprintf("Write block [%02x] failed", block); } } - if (written == total_block) + + if (written == total_blocks) Dbprintf("Clone complete"); else Dbprintf("Clone incomplete"); - cmd_send(CMD_ACK, 1, 0, 0, 0, 0); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_D_OFF(); + + cmd_send(CMD_ACK, 1, 0, 0, 0, 0); LED_A_OFF(); }