X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/32719adfa1d9bf48ec80c212665fd92c5ec5aa89..99cf19d9e8b450422f61c467751e8570537ab718:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 372fa3d1..9b7efaf6 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -568,11 +568,8 @@ void RAMFUNC SniffIso14443a(uint8_t param) { 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 @@ -600,8 +597,6 @@ 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 +606,12 @@ 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 +674,6 @@ 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(); @@ -913,8 +913,9 @@ 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 -// 44 * 8 data bits, 44 * 1 parity bits, 9 start bits, 9 stop bits, 9 correction bits -#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 370 //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 @@ -947,9 +948,6 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) uint8_t ar_nr_collected = 0; uint8_t sak; - - uint8_t blockzeros[512]; - memset(blockzeros, 0x00, sizeof(blockzeros)); // PACK response to PWD AUTH for EV1/NTAG uint8_t response8[4]; @@ -1064,7 +1062,10 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) //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 - #define TAG_RESPONSE_COUNT 9 + // 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 @@ -1075,6 +1076,7 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) { .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 @@ -1090,6 +1092,9 @@ 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: @@ -1118,9 +1123,6 @@ 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; @@ -1152,11 +1154,10 @@ 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; if ( block < 4 ) { //NTAG 215 - uint8_t start = 4 * block; - 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], @@ -1167,11 +1168,13 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00}; - ComputeCrc14443(CRC_14443_A, blockdata+start, 16, blockdata+start+17, blockdata+start+18); - EmSendCmdEx( blockdata+start, 18, false); - } else { - ComputeCrc14443(CRC_14443_A, blockzeros,16, blockzeros+17,blockzeros+18); - EmSendCmdEx(blockzeros,18,false); + 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; @@ -1181,11 +1184,42 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data) // 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 -- just returns all zeros. - uint8_t len = (receivedCmd[2]- receivedCmd[1] ) * 4; - ComputeCrc14443(CRC_14443_A, blockzeros,len, blockzeros+len+1, blockzeros+len+2); - EmSendCmdEx(blockzeros,len+2,false); - p_response = NULL; + } else if(receivedCmd[0] == 0x3A) { // Received a FAST READ (ranged read) -- just returns all zeros. + + 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 data[] = {0x00,0x00,0x00,0x14,0xa5}; + 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); + + // 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) { @@ -1257,6 +1291,8 @@ 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); } } else { @@ -1363,10 +1399,12 @@ 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(); BigBuf_free_keep_EM(); + LED_A_OFF(); + + Dbprintf("-[ Wake ups after halt [%d]", happened); + Dbprintf("-[ Messages after halt [%d]", happened2); + Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd); } @@ -1647,9 +1685,7 @@ 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: @@ -2139,11 +2175,13 @@ 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); @@ -2162,27 +2200,32 @@ 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; @@ -2197,11 +2240,8 @@ 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; @@ -2218,22 +2258,23 @@ 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; } @@ -2267,14 +2308,15 @@ 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; @@ -2283,7 +2325,7 @@ 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; } @@ -2335,12 +2377,17 @@ 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}; @@ -2353,9 +2400,11 @@ 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); } @@ -2412,13 +2461,6 @@ 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); @@ -2465,10 +2507,6 @@ 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", @@ -2480,6 +2518,17 @@ 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(); @@ -2891,9 +2940,6 @@ 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 @@ -2909,6 +2955,10 @@ 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; @@ -2918,8 +2968,6 @@ 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); @@ -2999,7 +3047,6 @@ 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 */