X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c068ebb78f2e4070fcf1a604df0d7088374b60c6..e9a92fe23750c5047943b4e37a7e9c0ba02dd84b:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 8e547147..e2137832 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -1,4 +1,4 @@ -//----------------------------------------------------------------------------- + //----------------------------------------------------------------------------- // Merlok - June 2011, 2012 // Gerhard de Koning Gans - May 2008 // Hagen Fritsch - June 2010 @@ -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; ) { @@ -714,12 +713,13 @@ 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(); + + set_tracing(FALSE); } //----------------------------------------------------------------------------- @@ -912,7 +912,9 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe // Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) // 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits // -> need 273 bytes buffer -#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273 +// 44 * 8 data bits, 44 * 1 parity bits, 9 start bits, 9 stop bits, 9 correction bits --370 +// 47 * 8 data bits, 47 * 1 parity bits, 10 start bits, 10 stop bits, 10 correction bits +#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 453 bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) { // Retrieve and store the current buffer index @@ -935,9 +937,9 @@ 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) { - + uint32_t counters[] = {0,0,0}; //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2 // This can be used in a reader-only attack. // (it can also be retrieved via 'hf 14a list', but hey... @@ -945,9 +947,12 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) uint8_t ar_nr_collected = 0; uint8_t sak; - + + // PACK response to PWD AUTH for EV1/NTAG + 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 @@ -958,7 +963,7 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) } break; case 2: { // MIFARE Ultralight // Says: I am a stupid memory tag, no crypto - response1[0] = 0x04; + response1[0] = 0x44; response1[1] = 0x00; sak = 0x00; } break; @@ -986,6 +991,16 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) response1[1] = 0x00; sak = 0x09; } break; + case 7: { // NTAG? + // Says: I am a NTAG, + response1[0] = 0x44; + response1[1] = 0x00; + sak = 0x00; + // PACK + response8[0] = 0x80; + response8[1] = 0x80; + ComputeCrc14443(CRC_14443_A, response8, 2, &response8[2], &response8[3]); + } break; default: { Dbprintf("Error: unkown tagtype (%d)",tagType); return; @@ -1007,7 +1022,7 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) response2a[0] = data[3]; response2a[1] = data[4]; response2a[2] = data[5]; - response2a[3] = data[7]; + response2a[3] = data[6]; //?? response2a[4] = response2a[0] ^ response2a[1] ^ response2a[2] ^ response2a[3]; // Configure the ATQA and SAK accordingly @@ -1042,7 +1057,14 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) // TC(1) = 0x02: CID supported, NAD not supported ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]); - #define TAG_RESPONSE_COUNT 7 + // Prepare GET_VERSION (different for EV-1 / NTAG) + //uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7}; //EV1 48bytes VERSION. + uint8_t response7_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215 + + // Prepare CHK_TEARING + uint8_t response9[] = {0xBD,0x90,0x3f}; + + #define TAG_RESPONSE_COUNT 10 tag_response_info_t responses[TAG_RESPONSE_COUNT] = { { .response = response1, .response_n = sizeof(response1) }, // Answer to request - respond with card type { .response = response2, .response_n = sizeof(response2) }, // Anticollision cascade1 - respond with uid @@ -1051,6 +1073,9 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) { .response = response3a, .response_n = sizeof(response3a) }, // Acknowledge select - cascade 2 { .response = response5, .response_n = sizeof(response5) }, // Authentication answer (random nonce) { .response = response6, .response_n = sizeof(response6) }, // dummy ATS (pseudo-ATR), answer to RATS + { .response = response7_NTAG, .response_n = sizeof(response7_NTAG) }, // EV1/NTAG GET_VERSION response + { .response = response8, .response_n = sizeof(response8) }, // EV1/NTAG PACK response + { .response = response9, .response_n = sizeof(response9) } // EV1/NTAG CHK_TEAR response }; // Allocate 512 bytes for the dynamic modulation, created when the reader queries for it @@ -1066,6 +1091,9 @@ 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: @@ -1094,9 +1122,6 @@ 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; @@ -1126,10 +1151,80 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) { // Received a SELECT (cascade 2) p_response = &responses[4]; order = 30; } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ - EmSendCmdEx(data+(4*receivedCmd[1]),16,false); - // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]); - // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below + uint8_t block = receivedCmd[1]; + if ( tagType == 7 ) { + uint16_t start = 4 * block; + + /*if ( block < 4 ) { + //NTAG 215 + uint8_t blockdata[50] = { + data[0],data[1],data[2], 0x88 ^ data[0] ^ data[1] ^ data[2], + data[3],data[4],data[5],data[6], + data[3] ^ data[4] ^ data[5] ^ data[6],0x48,0x0f,0xe0, + 0xe1,0x10,0x12,0x00, + 0x03,0x00,0xfe,0x00, + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + 0x00,0x00,0x00,0x00, + 0x00,0x00}; + AppendCrc14443a(blockdata+start, 16); + EmSendCmdEx( blockdata+start, MAX_MIFARE_FRAME_SIZE, false); + } else {*/ + uint8_t emdata[MAX_MIFARE_FRAME_SIZE]; + emlGetMemBt( emdata, start, 16); + AppendCrc14443a(emdata, 16); + EmSendCmdEx(emdata, sizeof(emdata), false); + //} + p_response = NULL; + + } else { + EmSendCmdEx(data+(4*block),16,false); + // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]); + // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below + p_response = NULL; + } + } else if(receivedCmd[0] == 0x3A) { // Received a FAST READ (ranged read) + + uint8_t emdata[MAX_FRAME_SIZE]; + int start = receivedCmd[1] * 4; + int len = (receivedCmd[2] - receivedCmd[1] + 1) * 4; + emlGetMemBt( emdata, start, len); + AppendCrc14443a(emdata, len); + EmSendCmdEx(emdata, len+2, false); + p_response = NULL; + + } else if(receivedCmd[0] == 0x3C && tagType == 7) { // Received a READ SIGNATURE -- + // ECC data, taken from a NTAG215 amiibo token. might work. LEN: 32, + 2 crc + uint8_t data[] = {0x56,0x06,0xa6,0x4f,0x43,0x32,0x53,0x6f, + 0x43,0xda,0x45,0xd6,0x61,0x38,0xaa,0x1e, + 0xcf,0xd3,0x61,0x36,0xca,0x5f,0xbb,0x05, + 0xce,0x21,0x24,0x5b,0xa6,0x7a,0x79,0x07, + 0x00,0x00}; + AppendCrc14443a(data, sizeof(data)-2); + EmSendCmdEx(data,sizeof(data),false); + p_response = NULL; + } else if (receivedCmd[0] == 0x39 && tagType == 7) { // Received a READ COUNTER -- + uint8_t index = receivedCmd[1]; + uint8_t data[] = {0x00,0x00,0x00,0x14,0xa5}; + if ( counters[index] > 0) { + num_to_bytes(counters[index], 3, data); + AppendCrc14443a(data, sizeof(data)-2); + } + EmSendCmdEx(data,sizeof(data),false); p_response = NULL; + } else if (receivedCmd[0] == 0xA5 && tagType == 7) { // Received a INC COUNTER -- + // number of counter + uint8_t counter = receivedCmd[1]; + uint32_t val = bytes_to_num(receivedCmd+2,4); + counters[counter] = val; + + // send ACK + uint8_t ack[] = {0x0a}; + EmSendCmdEx(ack,sizeof(ack),false); + p_response = NULL; + + } else if(receivedCmd[0] == 0x3E && tagType == 7) { // Received a CHECK_TEARING_EVENT -- + p_response = &responses[9]; } else if(receivedCmd[0] == 0x50) { // Received a HALT if (tracing) { @@ -1137,7 +1232,12 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) } p_response = NULL; } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) { // Received an authentication request - p_response = &responses[5]; order = 7; + + if ( tagType == 7 ) { // IF NTAG /EV1 0x60 == GET_VERSION, not a authentication request. + p_response = &responses[7]; + } else { + p_response = &responses[5]; order = 7; + } } else if(receivedCmd[0] == 0xE0) { // Received a RATS request if (tagType == 1 || tagType == 2) { // RATS not supported EmSend4bit(CARD_NACK_NA); @@ -1181,6 +1281,16 @@ 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); @@ -1188,12 +1298,31 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) memset(ar_nr_responses, 0x00, len); } } - } else { + } else if (receivedCmd[0] == 0x1a ) // ULC authentication + { + + } + else if (receivedCmd[0] == 0x1b) // NTAG / EV-1 authentication + { + if ( tagType == 7 ) { + p_response = &responses[8]; // PACK response + uint32_t pwd = bytes_to_num(receivedCmd+1,4); + + 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; @@ -1213,15 +1342,17 @@ 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: { @@ -1292,10 +1423,15 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) } FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - - Dbprintf("%x %x %x", happened, happened2, cmdsRecvd); - LED_A_OFF(); + set_tracing(FALSE); 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); + } } @@ -1306,7 +1442,7 @@ void PrepareDelayedTransfer(uint16_t delay) uint8_t bitmask = 0; uint8_t bits_to_shift = 0; uint8_t bits_shifted = 0; - + delay &= 0x07; if (delay) { for (uint16_t i = 0; i < delay; i++) { @@ -1576,9 +1712,7 @@ 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: @@ -1708,7 +1842,6 @@ 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); @@ -1724,13 +1857,11 @@ 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 @@ -1739,7 +1870,6 @@ 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 @@ -2059,6 +2189,7 @@ void ReaderIso14443a(UsbCommand *c) } FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + set_tracing(FALSE); LEDsoff(); } @@ -2068,13 +2199,15 @@ 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++) { + for (i = 1; i < 0xFFFF; i++) { nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i; nttmp2 = prng_successor(nttmp2, 1); @@ -2091,27 +2224,32 @@ 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; @@ -2119,22 +2257,20 @@ 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; - 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). + 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 { @@ -2147,36 +2283,85 @@ void ReaderMifare(bool first_try) { LED_A_ON(); LED_B_OFF(); LED_C_OFF(); - LED_C_ON(); + + + #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++) { + 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 (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)) { @@ -2194,28 +2379,48 @@ void ReaderMifare(bool first_try) { int nt_distance = dist_nt(previous_nt, nt); if (nt_distance == 0) { 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; + } else { + if (nt_distance == -99999) { // invalid nonce received + unexpected_random++; + if (unexpected_random > MAX_UNEXPECTED_RANDOM) { + isOK = -3; // Card has an unpredictable PRNG. Give up + break; + } else { + continue; // continue trying... + } + } + 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); } - - 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; } } 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; } + catch_up_cycles /= elapsed_prng_sequences; if (catch_up_cycles == last_catch_up) { consecutive_resyncs++; } @@ -2229,6 +2434,9 @@ 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; } @@ -2236,12 +2444,10 @@ 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 } @@ -2264,16 +2470,30 @@ 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}; + 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); @@ -2282,13 +2502,14 @@ 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 : @@ -2310,7 +2531,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * uint8_t cardWRBL = 0; uint8_t cardAUTHSC = 0; uint8_t cardAUTHKEY = 0xff; // no authentication - uint32_t cardRr = 0; +// uint32_t cardRr = 0; uint32_t cuid = 0; //uint32_t rn_enc = 0; uint32_t ans = 0; @@ -2328,25 +2549,19 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!! - uint8_t rSAK[] = {0x08, 0xb6, 0xdd}; + uint8_t rSAK[] = {0x08, 0xb6, 0xdd}; // Mifare Classic + //uint8_t rSAK[] = {0x09, 0x3f, 0xcc }; // Mifare Mini uint8_t rSAK1[] = {0x04, 0xda, 0x17}; - uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04}; + uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01}; uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00}; //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2 // This can be used in a reader-only attack. // (it can also be retrieved via 'hf 14a list', but hey... - uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0}; + 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); @@ -2376,6 +2591,11 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } } + // save uid. + ar_nr_responses[0*5] = bytes_to_num(rUIDBCC1+1, 3); + if ( _7BUID ) + ar_nr_responses[0*5+1] = bytes_to_num(rUIDBCC2, 4); + /* * Regardless of what method was used to set the UID, set fifth byte and modify * the ATQA for 4 or 7-byte UID @@ -2388,10 +2608,6 @@ 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", @@ -2403,6 +2619,17 @@ 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(); @@ -2418,7 +2645,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * if(cardSTATE == MFEMUL_NOFIELD) continue; //Now, get data - res = EmGetCmd(receivedCmd, &len, receivedCmd_par); if (res == 2) { //Field is off! cardSTATE = MFEMUL_NOFIELD; @@ -2493,10 +2719,11 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * if(ar_nr_collected < 2){ if(ar_nr_responses[2] != ar) {// Avoid duplicates... probably not necessary, ar should vary. - ar_nr_responses[ar_nr_collected*4] = cuid; - ar_nr_responses[ar_nr_collected*4+1] = nonce; - ar_nr_responses[ar_nr_collected*4+2] = ar; - ar_nr_responses[ar_nr_collected*4+3] = nr; + //ar_nr_responses[ar_nr_collected*5] = 0; + //ar_nr_responses[ar_nr_collected*5+1] = 0; + ar_nr_responses[ar_nr_collected*5+2] = nonce; + ar_nr_responses[ar_nr_collected*5+3] = nr; + ar_nr_responses[ar_nr_collected*5+4] = ar; ar_nr_collected++; } // Interactive mode flag, means we need to send ACK @@ -2507,22 +2734,23 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } // --- crypto - crypto1_word(pcs, ar , 1); - cardRr = nr ^ crypto1_word(pcs, 0, 0); - - // test if auth OK - if (cardRr != prng_successor(nonce, 64)){ - if (MF_DBGLEVEL >= 2) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x", - cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B', - cardRr, prng_successor(nonce, 64)); + //crypto1_word(pcs, ar , 1); + //cardRr = nr ^ crypto1_word(pcs, 0, 0); + + //test if auth OK + //if (cardRr != prng_successor(nonce, 64)){ + + //if (MF_DBGLEVEL >= 4) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x", + // cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B', + // cardRr, prng_successor(nonce, 64)); // Shouldn't we respond anything here? // Right now, we don't nack or anything, which causes the // reader to do a WUPA after a while. /Martin // -- which is the correct response. /piwi - cardSTATE_TO_IDLE(); - LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); - break; - } + //cardSTATE_TO_IDLE(); + //LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); + //break; + //} ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0); @@ -2630,13 +2858,13 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * || receivedCmd[0] == 0xB0) { // transfer if (receivedCmd[1] >= 16 * 4) { EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); - if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]); + if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate (0x%02) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]); break; } if (receivedCmd[1] / 4 != cardAUTHSC) { EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); - if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd[0],receivedCmd[1],cardAUTHSC); + if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate (0x%02) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd[0],receivedCmd[1],cardAUTHSC); break; } } @@ -2668,7 +2896,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * if (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2) { if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]); if (emlCheckValBl(receivedCmd[1])) { - if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking"); + if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking"); EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); break; } @@ -2770,35 +2998,49 @@ 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,1,0,&ar_nr_responses,ar_nr_collected*4*4); + uint8_t len = ar_nr_collected*5*4; + cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, len, 0, &ar_nr_responses, len); } if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 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[1], // NT - ar_nr_responses[2], // AR1 - ar_nr_responses[3], // NR1 - ar_nr_responses[6], // AR2 - ar_nr_responses[7] // NR2 + Dbprintf("../tools/mfkey/mfkey32 %06x%08x %08x %08x %08x %08x %08x", + ar_nr_responses[0], // UID1 + ar_nr_responses[1], // UID2 + ar_nr_responses[2], // NT + ar_nr_responses[3], // AR1 + ar_nr_responses[4], // NR1 + 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 ) { - Dbprintf("Only got these: UID=%08x, nonce=%08x, AR1=%08x, NR1=%08x", - ar_nr_responses[0], // UID - ar_nr_responses[1], // NT - ar_nr_responses[2], // AR1 - ar_nr_responses[3] // NR1 + Dbprintf("Only got these: UID=%07x%08x, nonce=%08x, AR1=%08x, NR1=%08x", + ar_nr_responses[0], // UID1 + ar_nr_responses[1], // UID2 + ar_nr_responses[2], // NT + ar_nr_responses[3], // AR1 + ar_nr_responses[4] // NR1 ); } } } - if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen()); + if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen()); + set_tracing(FALSE); } @@ -2811,9 +3053,6 @@ 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 @@ -2829,6 +3068,10 @@ 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; @@ -2838,8 +3081,6 @@ 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); @@ -2919,7 +3160,7 @@ 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 */ DemodReset(); @@ -2939,6 +3180,7 @@ 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); } @@ -2953,11 +3195,9 @@ 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); + set_tracing(FALSE); }