X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c830303d7efc90879cf2124a484991f38c58654d..3bc7b13d237109c9dca948326315c1476f78c415:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 354b829c..492e2d6d 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -565,19 +565,18 @@ void RAMFUNC SniffIso14443a(uint8_t param) { // param: // bit 0 - trigger from first card answer // bit 1 - trigger from first reader 7-bit request - LEDsoff(); - // 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. - // triggered == FALSE -- to wait first for card - bool triggered = !(param & 0x03); + iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER); // Allocate memory from BigBuf for some buffers // free all previous allocations first BigBuf_free(); - + + // init trace buffer + clear_trace(); + set_tracing(TRUE); + // The command (reader -> tag) that we're receiving. uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE); @@ -589,10 +588,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) { // The DMA buffer, used to stream samples from the FPGA uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); - // init trace buffer - clear_trace(); - set_tracing(TRUE); - uint8_t *data = dmaBuf; uint8_t previous_data = 0; int maxDataLen = 0; @@ -600,8 +595,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) { bool TagIsActive = FALSE; bool ReaderIsActive = FALSE; - iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER); - // Set up the demodulator for tag -> reader responses. DemodInit(receivedResponse, receivedResponsePar); @@ -611,6 +604,12 @@ void RAMFUNC SniffIso14443a(uint8_t param) { // Setup and start DMA. FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); + // 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. + // triggered == FALSE -- to wait first for card + bool triggered = !(param & 0x03); + // And now we loop, receiving samples. for(uint32_t rsamples = 0; TRUE; ) { @@ -673,7 +672,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) { } /* And ready to receive another command. */ UartReset(); - //UartInit(receivedCmd, receivedCmdPar); /* And also reset the demod code, which might have been */ /* false-triggered by the commands from the reader. */ DemodReset(); @@ -715,12 +713,11 @@ void RAMFUNC SniffIso14443a(uint8_t param) { } } // main cycle - DbpString("COMMAND FINISHED"); - FpgaDisableSscDma(); + LEDsoff(); + Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len); Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]); - LEDsoff(); } //----------------------------------------------------------------------------- @@ -938,7 +935,7 @@ bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) { // Main loop of simulated tag: receive commands from reader, decide what // response to send, and send it. //----------------------------------------------------------------------------- -void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) +void SimulateIso14443aTag(int tagType, int flags, byte_t* data) { //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2 @@ -950,10 +947,10 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) uint8_t sak; // PACK response to PWD AUTH for EV1/NTAG - uint8_t response8[4]; + uint8_t response8[4] = {0,0,0,0}; // The first response contains the ATQA (note: bytes are transmitted in reverse order). - uint8_t response1[2]; + uint8_t response1[2] = {0,0}; switch (tagType) { case 1: { // MIFARE Classic @@ -1050,7 +1047,7 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) response3a[0] = sak & 0xFB; ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); - uint8_t response5[] = { 0x01, 0x01, 0x01, 0x01 }; // Very random tag nonce + uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS: // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present, // TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1 @@ -1092,6 +1089,9 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) .modulation_n = 0 }; + // We need to listen to the high-frequency, peak-detected path. + iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN); + BigBuf_free_keep_EM(); // allocate buffers: @@ -1120,9 +1120,6 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) int happened2 = 0; int cmdsRecvd = 0; - // We need to listen to the high-frequency, peak-detected path. - iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN); - cmdsRecvd = 0; tag_response_info_t* p_response; @@ -1154,9 +1151,9 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ uint8_t block = receivedCmd[1]; if ( tagType == 7 ) { - uint8_t start = 4 * block; + uint16_t start = 4 * block; - if ( block < 4 ) { + /*if ( block < 4 ) { //NTAG 215 uint8_t blockdata[50] = { data[0],data[1],data[2], 0x88 ^ data[0] ^ data[1] ^ data[2], @@ -1170,12 +1167,12 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) 0x00,0x00}; AppendCrc14443a(blockdata+start, 16); EmSendCmdEx( blockdata+start, MAX_MIFARE_FRAME_SIZE, false); - } else { + } else {*/ uint8_t emdata[MAX_MIFARE_FRAME_SIZE]; emlGetMemBt( emdata, start, 16); AppendCrc14443a(emdata, 16); EmSendCmdEx(emdata, sizeof(emdata), false); - } + //} p_response = NULL; } else { @@ -1276,6 +1273,16 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) ar_nr_responses[8], // AR2 ar_nr_responses[9] // NR2 ); + Dbprintf("../tools/mfkey/mfkey32v2 %06x%08x %08x %08x %08x %08x %08x %08x", + ar_nr_responses[0], // UID1 + ar_nr_responses[1], // UID2 + ar_nr_responses[2], // NT1 + ar_nr_responses[3], // AR1 + ar_nr_responses[4], // NR1 + ar_nr_responses[7], // NT2 + ar_nr_responses[8], // AR2 + ar_nr_responses[9] // NR2 + ); } uint8_t len = ar_nr_collected*5*4; cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,len,0,&ar_nr_responses,len); @@ -1292,15 +1299,22 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) if ( tagType == 7 ) { p_response = &responses[8]; // PACK response uint32_t pwd = bytes_to_num(receivedCmd+1,4); - Dbprintf("Auth attempt: %08x", pwd); + + if ( MF_DBGLEVEL >= 3) Dbprintf("Auth attempt: %08x", pwd); } } else { // Check for ISO 14443A-4 compliant commands, look at left nibble switch (receivedCmd[0]) { - + case 0x02: + case 0x03: { // IBlock (command no CID) + dynamic_response_info.response[0] = receivedCmd[0]; + dynamic_response_info.response[1] = 0x90; + dynamic_response_info.response[2] = 0x00; + dynamic_response_info.response_n = 3; + } break; case 0x0B: - case 0x0A: { // IBlock (command) + case 0x0A: { // IBlock (command CID) dynamic_response_info.response[0] = receivedCmd[0]; dynamic_response_info.response[1] = 0x00; dynamic_response_info.response[2] = 0x90; @@ -1320,15 +1334,17 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) dynamic_response_info.response_n = 2; } break; - case 0xBA: { // - memcpy(dynamic_response_info.response,"\xAB\x00",2); - dynamic_response_info.response_n = 2; + case 0xBA: { // ping / pong + dynamic_response_info.response[0] = 0xAB; + dynamic_response_info.response[1] = 0x00; + dynamic_response_info.response_n = 2; } break; case 0xCA: case 0xC2: { // Readers sends deselect command - memcpy(dynamic_response_info.response,"\xCA\x00",2); - dynamic_response_info.response_n = 2; + dynamic_response_info.response[0] = 0xCA; + dynamic_response_info.response[1] = 0x00; + dynamic_response_info.response_n = 2; } break; default: { @@ -1402,9 +1418,11 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) BigBuf_free_keep_EM(); LED_A_OFF(); + if (MF_DBGLEVEL >= 4){ Dbprintf("-[ Wake ups after halt [%d]", happened); Dbprintf("-[ Messages after halt [%d]", happened2); Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd); + } } @@ -1815,7 +1833,6 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive } } - void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) { CodeIso14443aBitsAsReaderPar(frame, bits, par); @@ -1831,13 +1848,11 @@ void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t } } - void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing) { ReaderTransmitBitsPar(frame, len*8, par, timing); } - void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing) { // Generate parity and redirect @@ -1846,7 +1861,6 @@ void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing) ReaderTransmitBitsPar(frame, len, par, timing); } - void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing) { // Generate parity and redirect @@ -2183,7 +2197,7 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) { nttmp1 = nt1; nttmp2 = nt2; - for (i = 1; i < 32768; i++) { + for (i = 1; i < 0xFFFF; i++) { nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i; nttmp2 = prng_successor(nttmp2, 1); @@ -2210,6 +2224,10 @@ void ReaderMifare(bool first_try) uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; + if (first_try) { + iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); + } + // free eventually allocated BigBuf memory. We want all for tracing. BigBuf_free(); @@ -2229,20 +2247,20 @@ void ReaderMifare(bool first_try) byte_t par_list[8] = {0x00}; byte_t ks_list[8] = {0x00}; + #define PRNG_SEQUENCE_LENGTH (1 << 16); static uint32_t sync_time = 0; - static uint32_t sync_cycles = 0; + static int32_t sync_cycles = 0; int catch_up_cycles = 0; int last_catch_up = 0; + uint16_t elapsed_prng_sequences; uint16_t consecutive_resyncs = 0; int isOK = 0; if (first_try) { mf_nr_ar3 = 0; - iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); sync_time = GetCountSspClk() & 0xfffffff8; - sync_cycles = 65536; // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces). + sync_cycles = PRNG_SEQUENCE_LENGTH; //65536; //0x10000 // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces). nt_attacked = 0; - nt = 0; par[0] = 0; } else { @@ -2257,8 +2275,17 @@ void ReaderMifare(bool first_try) LED_C_OFF(); - #define DARKSIDE_MAX_TRIES 32 // number of tries to sync on PRNG cycle. Then give up. - uint16_t unsuccessfull_tries = 0; + #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up. + #define MAX_SYNC_TRIES 32 + #define NUM_DEBUG_INFOS 8 // per strategy + #define MAX_STRATEGY 3 + uint16_t unexpected_random = 0; + uint16_t sync_tries = 0; + int16_t debug_info_nr = -1; + uint16_t strategy = 0; + int32_t debug_info[MAX_STRATEGY][NUM_DEBUG_INFOS]; + uint32_t select_time; + uint32_t halt_time; for(uint16_t i = 0; TRUE; i++) { @@ -2271,21 +2298,60 @@ void ReaderMifare(bool first_try) break; } + if (strategy == 2) { + // test with additional hlt command + halt_time = 0; + int len = mifare_sendcmd_short(NULL, false, 0x50, 0x00, receivedAnswer, receivedAnswerPar, &halt_time); + if (len && MF_DBGLEVEL >= 3) { + Dbprintf("Unexpected response of %d bytes to hlt command (additional debugging).", len); + } + } + + if (strategy == 3) { + // test with FPGA power off/on + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + SpinDelay(200); + iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); + SpinDelay(100); + } + if(!iso14443a_select_card(uid, NULL, &cuid)) { if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card"); continue; } + select_time = GetCountSspClk(); - sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles; - catch_up_cycles = 0; + elapsed_prng_sequences = 1; + if (debug_info_nr == -1) { + sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles; + catch_up_cycles = 0; - // if we missed the sync time already, advance to the next nonce repeat - while(GetCountSspClk() > sync_time) { - sync_time = (sync_time & 0xfffffff8) + sync_cycles; - } + // if we missed the sync time already, advance to the next nonce repeat + while(GetCountSspClk() > sync_time) { + elapsed_prng_sequences++; + sync_time = (sync_time & 0xfffffff8) + sync_cycles; + } - // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked) - ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time); + // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked) + ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time); + } else { + // collect some information on tag nonces for debugging: + #define DEBUG_FIXED_SYNC_CYCLES PRNG_SEQUENCE_LENGTH + if (strategy == 0) { + // nonce distances at fixed time after card select: + sync_time = select_time + DEBUG_FIXED_SYNC_CYCLES; + } else if (strategy == 1) { + // nonce distances at fixed time between authentications: + sync_time = sync_time + DEBUG_FIXED_SYNC_CYCLES; + } else if (strategy == 2) { + // nonce distances at fixed time after halt: + sync_time = halt_time + DEBUG_FIXED_SYNC_CYCLES; + } else { + // nonce_distances at fixed time after power on + sync_time = DEBUG_FIXED_SYNC_CYCLES; + } + ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time); + } // Receive the (4 Byte) "random" nonce if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) { @@ -2303,19 +2369,37 @@ void ReaderMifare(bool first_try) int nt_distance = dist_nt(previous_nt, nt); if (nt_distance == 0) { nt_attacked = nt; - } - else { + } else { if (nt_distance == -99999) { // invalid nonce received - unsuccessfull_tries++; - if (!nt_attacked && unsuccessfull_tries > DARKSIDE_MAX_TRIES) { + unexpected_random++; + if (unexpected_random > MAX_UNEXPECTED_RANDOM) { isOK = -3; // Card has an unpredictable PRNG. Give up break; } else { continue; // continue trying... } } - sync_cycles = (sync_cycles - nt_distance); - if (MF_DBGLEVEL >= 3) Dbprintf("calibrating in cycle %d. nt_distance=%d, Sync_cycles: %d\n", i, nt_distance, sync_cycles); + if (++sync_tries > MAX_SYNC_TRIES) { + if (strategy > MAX_STRATEGY || MF_DBGLEVEL < 3) { + isOK = -4; // Card's PRNG runs at an unexpected frequency or resets unexpectedly + break; + } else { // continue for a while, just to collect some debug info + debug_info[strategy][debug_info_nr] = nt_distance; + debug_info_nr++; + if (debug_info_nr == NUM_DEBUG_INFOS) { + strategy++; + debug_info_nr = 0; + } + continue; + } + } + sync_cycles = (sync_cycles - nt_distance/elapsed_prng_sequences); + if (sync_cycles <= 0) { + sync_cycles += PRNG_SEQUENCE_LENGTH; + } + if (MF_DBGLEVEL >= 3) { + Dbprintf("calibrating in cycle %d. nt_distance=%d, elapsed_prng_sequences=%d, new sync_cycles: %d\n", i, nt_distance, elapsed_prng_sequences, sync_cycles); + } continue; } } @@ -2326,6 +2410,7 @@ void ReaderMifare(bool first_try) catch_up_cycles = 0; continue; } + catch_up_cycles /= elapsed_prng_sequences; if (catch_up_cycles == last_catch_up) { consecutive_resyncs++; } @@ -2339,6 +2424,9 @@ void ReaderMifare(bool first_try) else { sync_cycles = sync_cycles + catch_up_cycles; if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles); + last_catch_up = 0; + catch_up_cycles = 0; + consecutive_resyncs = 0; } continue; } @@ -2346,12 +2434,10 @@ void ReaderMifare(bool first_try) consecutive_resyncs = 0; // Receive answer. This will be a 4 Bit NACK when the 8 parity bits are OK after decoding - if (ReaderReceive(receivedAnswer, receivedAnswerPar)) - { + if (ReaderReceive(receivedAnswer, receivedAnswerPar)) { catch_up_cycles = 8; // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer - if (nt_diff == 0) - { + if (nt_diff == 0) { par_low = par[0] & 0xE0; // there is no need to check all parities for other nt_diff. Parity Bits for mf_nr_ar[0..2] won't change } @@ -2387,8 +2473,17 @@ void ReaderMifare(bool first_try) mf_nr_ar[3] &= 0x1F; - byte_t buf[28] = {0x00}; + if (isOK == -4) { + if (MF_DBGLEVEL >= 3) { + for (uint16_t i = 0; i <= MAX_STRATEGY; i++) { + for(uint16_t j = 0; j < NUM_DEBUG_INFOS; j++) { + Dbprintf("collected debug info[%d][%d] = %d", i, j, debug_info[i][j]); + } + } + } + } + byte_t buf[28]; memcpy(buf + 0, uid, 4); num_to_bytes(nt, 4, buf + 4); memcpy(buf + 8, par_list, 8); @@ -2397,13 +2492,14 @@ void ReaderMifare(bool first_try) cmd_send(CMD_ACK,isOK,0,0,buf,28); - set_tracing(FALSE); + // Thats it... FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LEDsoff(); -} + set_tracing(FALSE); +} - /* +/** *MIFARE 1K simulate. * *@param flags : @@ -2456,13 +2552,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0}; uint8_t ar_nr_collected = 0; - // free eventually allocated BigBuf memory but keep Emulator Memory - BigBuf_free_keep_EM(); - - // clear trace - clear_trace(); - set_tracing(TRUE); - // Authenticate response - nonce uint32_t nonce = bytes_to_num(rAUTH_NT, 4); @@ -2509,10 +2598,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; } - // We need to listen to the high-frequency, peak-detected path. - iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN); - - if (MF_DBGLEVEL >= 1) { if (!_7BUID) { Dbprintf("4B UID: %02x%02x%02x%02x", @@ -2524,6 +2609,17 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } } + // We need to listen to the high-frequency, peak-detected path. + iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN); + + // free eventually allocated BigBuf memory but keep Emulator Memory + BigBuf_free_keep_EM(); + + // clear trace + clear_trace(); + set_tracing(TRUE); + + bool finished = FALSE; while (!BUTTON_PRESS() && !finished) { WDT_HIT(); @@ -2909,6 +3005,16 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * ar_nr_responses[8], // AR2 ar_nr_responses[9] // NR2 ); + Dbprintf("../tools/mfkey/mfkey32v2 %06x%08x %08x %08x %08x %08x %08x %08x", + ar_nr_responses[0], // UID1 + ar_nr_responses[1], // UID2 + ar_nr_responses[2], // NT1 + ar_nr_responses[3], // AR1 + ar_nr_responses[4], // NR1 + ar_nr_responses[7], // NT2 + ar_nr_responses[8], // AR2 + ar_nr_responses[9] // NR2 + ); } else { Dbprintf("Failed to obtain two AR/NR pairs!"); if(ar_nr_collected > 0 ) { @@ -2935,9 +3041,6 @@ void RAMFUNC SniffMifare(uint8_t param) { // bit 0 - trigger from first card answer // bit 1 - trigger from first reader 7-bit request - // free eventually allocated BigBuf memory - BigBuf_free(); - // C(red) A(yellow) B(green) LEDsoff(); // init trace buffer @@ -2953,6 +3056,10 @@ void RAMFUNC SniffMifare(uint8_t param) { uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE]; + iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER); + + // free eventually allocated BigBuf memory + BigBuf_free(); // allocate the DMA buffer, used to stream samples from the FPGA uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); uint8_t *data = dmaBuf; @@ -2962,8 +3069,6 @@ void RAMFUNC SniffMifare(uint8_t param) { bool ReaderIsActive = FALSE; bool TagIsActive = FALSE; - iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER); - // Set up the demodulator for tag -> reader responses. DemodInit(receivedResponse, receivedResponsePar); @@ -3043,7 +3148,6 @@ void RAMFUNC SniffMifare(uint8_t param) { if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break; /* And ready to receive another command. */ - //UartInit(receivedCmd, receivedCmdPar); UartReset(); /* And also reset the demod code */ @@ -3064,6 +3168,7 @@ void RAMFUNC SniffMifare(uint8_t param) { // And reset the Miller decoder including its (now outdated) input buffer UartInit(receivedCmd, receivedCmdPar); + // why not UartReset? } TagIsActive = (Demod.state != DEMOD_UNSYNCD); } @@ -3078,11 +3183,8 @@ void RAMFUNC SniffMifare(uint8_t param) { } // main cycle - DbpString("COMMAND FINISHED"); - FpgaDisableSscDma(); MfSniffEnd(); - - Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len); LEDsoff(); + Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len); }