X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f53020e729d583f7975095ca7b4b467741d99edb..a71c68bdf0d117609a1ffd0141d1d682e1ff8e15:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 9f2b6d94..862594e9 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 @@ -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; @@ -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); @@ -1298,9 +1305,15 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) 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 +1333,17 @@ 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: { @@ -1685,9 +1700,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR; } - if(BUTTON_PRESS()) { - break; - } + if(BUTTON_PRESS()) break; } // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again: @@ -1817,7 +1830,6 @@ 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); @@ -1833,13 +1845,11 @@ 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 @@ -1848,7 +1858,6 @@ 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 @@ -2177,11 +2186,13 @@ void ReaderIso14443a(UsbCommand *c) // Therefore try in alternating directions. int32_t dist_nt(uint32_t nt1, uint32_t nt2) { + uint16_t i; + uint32_t nttmp1, nttmp2; + if (nt1 == nt2) return 0; - uint16_t i; - uint32_t nttmp1 = nt1; - uint32_t nttmp2 = nt2; + nttmp1 = nt1; + nttmp2 = nt2; for (i = 1; i < 32768; i++) { nttmp1 = prng_successor(nttmp1, 1); @@ -2200,27 +2211,32 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) { // Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime" // (article by Nicolas T. Courtois, 2009) //----------------------------------------------------------------------------- -void ReaderMifare(bool first_try) { +void ReaderMifare(bool first_try) +{ + // Mifare AUTH + uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; + uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; + static uint8_t mf_nr_ar3; + + 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(); clear_trace(); set_tracing(TRUE); - // Mifare AUTH - uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; - uint8_t mf_nr_ar[8] = { 0x00 }; //{ 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01 }; - static uint8_t mf_nr_ar3 = 0; - - uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = { 0x00 }; - uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = { 0x00 }; - byte_t nt_diff = 0; uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough static byte_t par_low = 0; bool led_on = TRUE; - uint8_t uid[10] = {0x00}; - //uint32_t cuid = 0x00; + uint8_t uid[10] ={0}; + uint32_t cuid; uint32_t nt = 0; uint32_t previous_nt = 0; @@ -2235,11 +2251,8 @@ void ReaderMifare(bool first_try) { uint16_t consecutive_resyncs = 0; int isOK = 0; - int numWrongDistance = 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). nt_attacked = 0; @@ -2256,22 +2269,23 @@ void ReaderMifare(bool first_try) { LED_A_ON(); LED_B_OFF(); LED_C_OFF(); - LED_C_ON(); + + + #define DARKSIDE_MAX_TRIES 32 // number of tries to sync on PRNG cycle. Then give up. + uint16_t unsuccessfull_tries = 0; for(uint16_t i = 0; TRUE; i++) { + LED_C_ON(); WDT_HIT(); // Test if the action was cancelled - if(BUTTON_PRESS()) break; - - if (numWrongDistance > 1000) { - isOK = 0; + if(BUTTON_PRESS()) { + isOK = -1; break; } - //if(!iso14443a_select_card(uid, NULL, &cuid)) { - if(!iso14443a_select_card(uid, NULL, NULL)) { + if(!iso14443a_select_card(uid, NULL, &cuid)) { if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card"); continue; } @@ -2305,14 +2319,15 @@ void ReaderMifare(bool first_try) { nt_attacked = nt; } else { - - // invalid nonce received, try again - if (nt_distance == -99999) { - numWrongDistance++; - if (MF_DBGLEVEL >= 3) Dbprintf("The two nonces has invalid distance, tag could have good PRNG\n"); - continue; + if (nt_distance == -99999) { // invalid nonce received + unsuccessfull_tries++; + if (!nt_attacked && unsuccessfull_tries > DARKSIDE_MAX_TRIES) { + 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); continue; @@ -2321,7 +2336,7 @@ void ReaderMifare(bool first_try) { if ((nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again... catch_up_cycles = -dist_nt(nt_attacked, nt); - if (catch_up_cycles >= 99999) { // invalid nonce received. Don't resync on that one. + if (catch_up_cycles == 99999) { // invalid nonce received. Don't resync on that one. catch_up_cycles = 0; continue; } @@ -2373,12 +2388,17 @@ void ReaderMifare(bool first_try) { if (nt_diff == 0 && first_try) { par[0]++; + if (par[0] == 0x00) { // tried all 256 possible parities without success. Card doesn't send NACK. + isOK = -2; + break; + } } else { par[0] = ((par[0] & 0x1F) + 1) | par_low; } } } + mf_nr_ar[3] &= 0x1F; byte_t buf[28] = {0x00}; @@ -2391,9 +2411,11 @@ 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); } @@ -2450,13 +2472,6 @@ 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); @@ -2503,10 +2518,6 @@ 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", @@ -2518,6 +2529,17 @@ 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(); @@ -2903,6 +2925,16 @@ 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 ) { @@ -2929,9 +2961,6 @@ 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 @@ -2947,6 +2976,10 @@ 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; @@ -2956,8 +2989,6 @@ 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); @@ -3037,7 +3068,6 @@ 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 */ @@ -3058,6 +3088,7 @@ 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); } @@ -3072,11 +3103,8 @@ 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); }