X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/3000dc4e7e72dd8661d174f7bcde511ff73eb99f..fce738fc902385b9d20ce107f462ca267473f8e4:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 05ffb941..b9fb9bae 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -15,7 +15,6 @@ #include "util.h" #include "string.h" #include "cmd.h" - #include "iso14443crc.h" #include "iso14443a.h" #include "crapto1.h" @@ -141,16 +140,40 @@ const uint8_t OddByteParity[256] = { 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1 }; + void iso14a_set_trigger(bool enable) { trigger = enable; } - void iso14a_set_timeout(uint32_t timeout) { iso14a_timeout = timeout; + if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", iso14a_timeout, iso14a_timeout / 106); } + +void iso14a_set_ATS_timeout(uint8_t *ats) { + + uint8_t tb1; + uint8_t fwi; + uint32_t fwt; + + if (ats[0] > 1) { // there is a format byte T0 + if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1) + if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1) + tb1 = ats[3]; + } else { + tb1 = ats[2]; + } + fwi = (tb1 & 0xf0) >> 4; // frame waiting indicator (FWI) + fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc + + iso14a_set_timeout(fwt/(8*16)); + } + } +} + + //----------------------------------------------------------------------------- // Generate the parity value for a byte sequence // @@ -189,6 +212,12 @@ void AppendCrc14443a(uint8_t* data, int len) ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1); } +void AppendCrc14443b(uint8_t* data, int len) +{ + ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1); +} + + //============================================================================= // ISO 14443 Type A - Miller decoder //============================================================================= @@ -208,13 +237,17 @@ void AppendCrc14443a(uint8_t* data, int len) static tUart Uart; // Lookup-Table to decide if 4 raw bits are a modulation. -// We accept two or three consecutive "0" in any position with the rest "1" +// We accept the following: +// 0001 - a 3 tick wide pause +// 0011 - a 2 tick wide pause, or a three tick wide pause shifted left +// 0111 - a 2 tick wide pause shifted left +// 1001 - a 2 tick wide pause shifted right const bool Mod_Miller_LUT[] = { - TRUE, TRUE, FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, - TRUE, TRUE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE + FALSE, TRUE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, + FALSE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE }; -#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x00F0) >> 4]) -#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x000F)]) +#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4]) +#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)]) void UartReset() { @@ -224,16 +257,19 @@ void UartReset() Uart.parityLen = 0; // number of decoded parity bytes Uart.shiftReg = 0; // shiftreg to hold decoded data bits Uart.parityBits = 0; // holds 8 parity bits - Uart.twoBits = 0x0000; // buffer for 2 Bits - Uart.highCnt = 0; Uart.startTime = 0; Uart.endTime = 0; + + Uart.byteCntMax = 0; + Uart.posCnt = 0; + Uart.syncBit = 9999; } void UartInit(uint8_t *data, uint8_t *parity) { Uart.output = data; Uart.parity = parity; + Uart.fourBits = 0x00000000; // clear the buffer for 4 Bits UartReset(); } @@ -241,45 +277,48 @@ void UartInit(uint8_t *data, uint8_t *parity) static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) { - Uart.twoBits = (Uart.twoBits << 8) | bit; + Uart.fourBits = (Uart.fourBits << 8) | bit; - if (Uart.state == STATE_UNSYNCD) { // not yet synced + if (Uart.state == STATE_UNSYNCD) { // not yet synced - if (Uart.highCnt < 7) { // wait for a stable unmodulated signal - if (Uart.twoBits == 0xffff) { - Uart.highCnt++; - } else { - Uart.highCnt = 0; - } - } else { - Uart.syncBit = 0xFFFF; // not set - // look for 00xx1111 (the start bit) - if ((Uart.twoBits & 0x6780) == 0x0780) Uart.syncBit = 7; - else if ((Uart.twoBits & 0x33C0) == 0x03C0) Uart.syncBit = 6; - else if ((Uart.twoBits & 0x19E0) == 0x01E0) Uart.syncBit = 5; - else if ((Uart.twoBits & 0x0CF0) == 0x00F0) Uart.syncBit = 4; - else if ((Uart.twoBits & 0x0678) == 0x0078) Uart.syncBit = 3; - else if ((Uart.twoBits & 0x033C) == 0x003C) Uart.syncBit = 2; - else if ((Uart.twoBits & 0x019E) == 0x001E) Uart.syncBit = 1; - else if ((Uart.twoBits & 0x00CF) == 0x000F) Uart.syncBit = 0; - if (Uart.syncBit != 0xFFFF) { + Uart.syncBit = 9999; // not set + + // 00x11111 2|3 ticks pause followed by 6|5 ticks unmodulated Sequence Z (a "0" or "start of communication") + // 11111111 8 ticks unmodulation Sequence Y (a "0" or "end of communication" or "no information") + // 111100x1 4 ticks unmodulated followed by 2|3 ticks pause Sequence X (a "1") + + // The start bit is one ore more Sequence Y followed by a Sequence Z (... 11111111 00x11111). We need to distinguish from + // Sequence X followed by Sequence Y followed by Sequence Z (111100x1 11111111 00x11111) + // we therefore look for a ...xx1111 11111111 00x11111xxxxxx... pattern + // (12 '1's followed by 2 '0's, eventually followed by another '0', followed by 5 '1's) + // +#define ISO14443A_STARTBIT_MASK 0x07FFEF80 // mask is 00001111 11111111 1110 1111 10000000 +#define ISO14443A_STARTBIT_PATTERN 0x07FF8F80 // pattern is 00001111 11111111 1000 1111 10000000 + + if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 0)) == ISO14443A_STARTBIT_PATTERN >> 0) Uart.syncBit = 7; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 1)) == ISO14443A_STARTBIT_PATTERN >> 1) Uart.syncBit = 6; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 2)) == ISO14443A_STARTBIT_PATTERN >> 2) Uart.syncBit = 5; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 3)) == ISO14443A_STARTBIT_PATTERN >> 3) Uart.syncBit = 4; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 4)) == ISO14443A_STARTBIT_PATTERN >> 4) Uart.syncBit = 3; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 5)) == ISO14443A_STARTBIT_PATTERN >> 5) Uart.syncBit = 2; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 6)) == ISO14443A_STARTBIT_PATTERN >> 6) Uart.syncBit = 1; + else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 7)) == ISO14443A_STARTBIT_PATTERN >> 7) Uart.syncBit = 0; + + if (Uart.syncBit != 9999) { // found a sync bit Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8); Uart.startTime -= Uart.syncBit; Uart.endTime = Uart.startTime; Uart.state = STATE_START_OF_COMMUNICATION; } - } } else { - if (IsMillerModulationNibble1(Uart.twoBits >> Uart.syncBit)) { - if (IsMillerModulationNibble2(Uart.twoBits >> Uart.syncBit)) { // Modulation in both halves - error + if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) { + if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation in both halves - error UartReset(); - Uart.highCnt = 6; } else { // Modulation in first half = Sequence Z = logic "0" if (Uart.state == STATE_MILLER_X) { // error - must not follow after X UartReset(); - Uart.highCnt = 6; } else { Uart.bitCount++; Uart.shiftReg = (Uart.shiftReg >> 1); // add a 0 to the shiftreg @@ -299,7 +338,7 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) } } } else { - if (IsMillerModulationNibble2(Uart.twoBits >> Uart.syncBit)) { // Modulation second half = Sequence X = logic "1" + if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation second half = Sequence X = logic "1" Uart.bitCount++; Uart.shiftReg = (Uart.shiftReg >> 1) | 0x100; // add a 1 to the shiftreg Uart.state = STATE_MILLER_X; @@ -334,12 +373,11 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) if (Uart.len) { return TRUE; // we are finished with decoding the raw data sequence } else { - UartReset(); // Nothing receiver - start over + UartReset(); // Nothing received - start over } } if (Uart.state == STATE_START_OF_COMMUNICATION) { // error - must not follow directly after SOC UartReset(); - Uart.highCnt = 6; } else { // a logic "0" Uart.bitCount++; Uart.shiftReg = (Uart.shiftReg >> 1); // add a 0 to the shiftreg @@ -406,6 +444,11 @@ void DemodReset() Demod.highCnt = 0; Demod.startTime = 0; Demod.endTime = 0; + + // + Demod.bitCount = 0; + Demod.syncBit = 0xFFFF; + Demod.samples = 0; } void DemodInit(uint8_t *data, uint8_t *parity) @@ -504,9 +547,7 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non } } } - } - return FALSE; // not finished yet, need more data } @@ -656,6 +697,9 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { // And ready to receive another response. DemodReset(); + // And reset the Miller decoder including itS (now outdated) input buffer + UartInit(receivedCmd, receivedCmdPar); + LED_C_OFF(); } TagIsActive = (Demod.state != DEMOD_UNSYNCD); @@ -1313,7 +1357,7 @@ void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8 } // Only transmit parity bit if we transmitted a complete byte - if (j == 8) { + if (j == 8 && parity != NULL) { // Get the parity bit if (parity[i>>3] & (0x80 >> (i&0x0007))) { // Sequence X @@ -1358,6 +1402,7 @@ void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *p CodeIso14443aBitsAsReaderPar(cmd, len*8, parity); } + //----------------------------------------------------------------------------- // Wait for commands from reader // Stop when button is pressed (return 1) or field was gone (return 2) @@ -1380,9 +1425,9 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) // Set ADC to read field strength AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST; AT91C_BASE_ADC->ADC_MR = - ADC_MODE_PRESCALE(32) | - ADC_MODE_STARTUP_TIME(16) | - ADC_MODE_SAMPLE_HOLD_TIME(8); + ADC_MODE_PRESCALE(63) | + ADC_MODE_STARTUP_TIME(1) | + ADC_MODE_SAMPLE_HOLD_TIME(15); AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF); // start ADC AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; @@ -1392,7 +1437,7 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) // Clear RXRDY: uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - + for(;;) { WDT_HIT(); @@ -1404,7 +1449,7 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF]; AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; if (analogCnt >= 32) { - if ((33000 * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) { + if ((MAX_ADC_HF_VOLTAGE * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) { vtime = GetTickCount(); if (!timer) timer = vtime; // 50ms no field --> card to idle state @@ -1479,14 +1524,15 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe } // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again: - for (i = 0; i < 2 ; ) { + uint8_t fpga_queued_bits = FpgaSendQueueDelay >> 3; + for (i = 0; i <= fpga_queued_bits/8 + 1; ) { if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = SEC_F; FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR; i++; } } - + LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded?8:0); return 0; @@ -1575,7 +1621,7 @@ bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_Start //----------------------------------------------------------------------------- static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset) { - uint32_t c; + uint32_t c = 0x00; // Set FPGA mode to "reader listen mode", no modulation (listen // only, since we are receiving, not transmitting). @@ -1588,8 +1634,7 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive // clear RXRDY: uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - - c = 0; + for(;;) { WDT_HIT(); @@ -1598,13 +1643,14 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive if(ManchesterDecoding(b, offset, 0)) { NextTransferTime = MAX(NextTransferTime, Demod.endTime - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/16 + FRAME_DELAY_TIME_PICC_TO_PCD); return TRUE; - } else if (c++ > iso14a_timeout) { + } else if (c++ > iso14a_timeout && Demod.state == DEMOD_UNSYNCD) { return FALSE; } } } } + void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) { CodeIso14443aBitsAsReaderPar(frame, bits, par); @@ -1620,11 +1666,13 @@ 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 @@ -1633,6 +1681,7 @@ 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 @@ -1693,6 +1742,11 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u memset(uid_ptr,0,10); } + // check for proprietary anticollision: + if ((resp[0] & 0x1F) == 0) { + return 3; + } + // OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in // which case we need to make a cascade 2 request and select - this is a long UID // While the UID is not complete, the 3nd bit (from the right) is set in the SAK. @@ -1796,6 +1850,10 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u // reset the PCB block number iso14_pcb_blocknum = 0; + + // set default timeout based on ATS + iso14a_set_ATS_timeout(resp); + return 1; } @@ -1821,7 +1879,7 @@ void iso14443a_setup(uint8_t fpga_minor_mode) { DemodReset(); UartReset(); NextTransferTime = 2*DELAY_ARM2AIR_AS_READER; - iso14a_set_timeout(1050); // 10ms default + iso14a_set_timeout(10*106); // 10ms default } int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) { @@ -1860,8 +1918,9 @@ void ReaderIso14443a(UsbCommand *c) { iso14a_command_t param = c->arg[0]; uint8_t *cmd = c->d.asBytes; - size_t len = c->arg[1]; - size_t lenbits = c->arg[2]; + size_t len = c->arg[1] & 0xffff; + size_t lenbits = c->arg[1] >> 16; + uint32_t timeout = c->arg[2]; uint32_t arg0 = 0; byte_t buf[USB_CMD_DATA_SIZE]; uint8_t par[MAX_PARITY_SIZE]; @@ -1886,7 +1945,7 @@ void ReaderIso14443a(UsbCommand *c) } if(param & ISO14A_SET_TIMEOUT) { - iso14a_set_timeout(c->arg[2]); + iso14a_set_timeout(timeout); } if(param & ISO14A_APDU) { @@ -1896,15 +1955,38 @@ void ReaderIso14443a(UsbCommand *c) if(param & ISO14A_RAW) { if(param & ISO14A_APPEND_CRC) { + if(param & ISO14A_TOPAZMODE) { + AppendCrc14443b(cmd,len); + } else { AppendCrc14443a(cmd,len); + } len += 2; if (lenbits) lenbits += 16; } - if(lenbits>0) { + if(lenbits>0) { // want to send a specific number of bits (e.g. short commands) + if(param & ISO14A_TOPAZMODE) { + int bits_to_send = lenbits; + uint16_t i = 0; + ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity + bits_to_send -= 7; + while (bits_to_send > 0) { + ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 8), NULL, NULL); // following bytes are 8 bit and no parity + bits_to_send -= 8; + } + } else { GetParity(cmd, lenbits/8, par); - ReaderTransmitBitsPar(cmd, lenbits, par, NULL); + ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity + } + } else { // want to send complete bytes only + if(param & ISO14A_TOPAZMODE) { + uint16_t i = 0; + ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy + while (i < len) { + ReaderTransmitBitsPar(&cmd[i++], 8, NULL, NULL); // following bytes: 8 bits, no paritiy + } } else { - ReaderTransmit(cmd,len, NULL); + ReaderTransmit(cmd,len, NULL); // 8 bits, odd parity + } } arg0 = ReaderReceive(buf, par); cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf)); @@ -2197,6 +2279,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * // free eventually allocated BigBuf memory but keep Emulator Memory BigBuf_free_keep_EM(); + // clear trace clear_trace(); set_tracing(TRUE); @@ -2261,10 +2344,8 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * WDT_HIT(); // find reader field - // Vref = 3300mV, and an 10:1 voltage divider on the input - // can measure voltages up to 33000 mV if (cardSTATE == MFEMUL_NOFIELD) { - vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10; + vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10; if (vHf > MF_MINFIELDV) { cardSTATE_TO_IDLE(); LED_A_ON(); @@ -2339,11 +2420,12 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); break; } + uint32_t ar = bytes_to_num(receivedCmd, 4); uint32_t nr = bytes_to_num(&receivedCmd[4], 4); //Collect AR/NR - if(ar_nr_collected < 2){ + if(ar_nr_collected < 2 && cardAUTHSC == 2){ if(ar_nr_responses[2] != ar) {// Avoid duplicates... probably not necessary, ar should vary. ar_nr_responses[ar_nr_collected*4] = cuid; @@ -2351,6 +2433,11 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * ar_nr_responses[ar_nr_collected*4+2] = ar; ar_nr_responses[ar_nr_collected*4+3] = nr; ar_nr_collected++; + } + // Interactive mode flag, means we need to send ACK + if(flags & FLAG_INTERACTIVE && ar_nr_collected == 2) + { + finished = true; } } @@ -2445,6 +2532,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); num_to_bytes(ans, 4, rAUTH_AT); } + EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT)); //Dbprintf("Sending rAUTH %02x%02x%02x%02x", rAUTH_AT[0],rAUTH_AT[1],rAUTH_AT[2],rAUTH_AT[3]); cardSTATE = MFEMUL_AUTH1; @@ -2497,7 +2585,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * mf_crypto1_encrypt(pcs, response, 18, response_par); EmSendCmdPar(response, 18, response_par); numReads++; - if(exitAfterNReads > 0 && numReads == exitAfterNReads) { + if(exitAfterNReads > 0 && numReads >= exitAfterNReads) { Dbprintf("%d reads done, exiting", numReads); finished = true; } @@ -2617,15 +2705,15 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * if(flags & FLAG_INTERACTIVE)// Interactive mode flag, means we need to send ACK { //May just aswell send the collected ar_nr in the response aswell - cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,0,0,&ar_nr_responses,ar_nr_collected*4*4); + cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,1,0,&ar_nr_responses,ar_nr_collected*4*4); } - if(flags & FLAG_NR_AR_ATTACK) + if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1 ) { - if(ar_nr_collected > 1) { + if(ar_nr_collected > 1 ) { Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:"); Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x", - ar_nr_responses[0], // UID + ar_nr_responses[0], // UID ar_nr_responses[1], //NT ar_nr_responses[2], //AR1 ar_nr_responses[3], //NR1 @@ -2634,7 +2722,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * ); } else { Dbprintf("Failed to obtain two AR/NR pairs!"); - if(ar_nr_collected >0) { + if(ar_nr_collected > 0 ) { Dbprintf("Only got these: UID=%08x, nonce=%08x, AR1=%08x, NR1=%08x", ar_nr_responses[0], // UID ar_nr_responses[1], //NT @@ -2645,6 +2733,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } } if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen()); + } @@ -2769,7 +2858,7 @@ void RAMFUNC SniffMifare(uint8_t param) { if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break; /* And ready to receive another command. */ - UartReset(); + UartInit(receivedCmd, receivedCmdPar); /* And also reset the demod code */ DemodReset(); @@ -2786,6 +2875,9 @@ void RAMFUNC SniffMifare(uint8_t param) { // And ready to receive another response. DemodReset(); + + // And reset the Miller decoder including its (now outdated) input buffer + UartInit(receivedCmd, receivedCmdPar); } TagIsActive = (Demod.state != DEMOD_UNSYNCD); }