X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/810f53792ea438c1b70eaa1f934db1e5c96220cb..13fc2e9c71175842dda4dedd878a92e07d519010:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 1c4d0f05..59edffc9 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -17,6 +17,7 @@ #include "cmd.h" #include "iso14443crc.h" #include "iso14443a.h" +#include "iso14443b.h" #include "crapto1.h" #include "mifareutil.h" #include "BigBuf.h" @@ -28,6 +29,8 @@ uint8_t trigger = 0; // the block number for the ISO14443-4 PCB static uint8_t iso14_pcb_blocknum = 0; +static uint8_t* free_buffer_pointer; + // // ISO14443 timing: // @@ -106,8 +109,6 @@ static uint32_t NextTransferTime; static uint32_t LastTimeProxToAirStart; static uint32_t LastProxToAirDuration; - - // CARD TO READER - manchester // Sequence D: 11110000 modulation with subcarrier during first half // Sequence E: 00001111 modulation with subcarrier during second half @@ -127,41 +128,39 @@ 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) + + if ((ats[1] & 0x10) == 0x10) // there is an interface byte TA(1) preceding TB(1) tb1 = ats[3]; - } else { + else tb1 = ats[2]; - } + fwi = (tb1 & 0xf0) >> 4; // frame waiting indicator (FWI) fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc + //fwt = 4096 * (1 << fwi); iso14a_set_timeout(fwt/(8*16)); + //iso14a_set_timeout(fwt/128); } } } - //----------------------------------------------------------------------------- // Generate the parity value for a byte sequence // //----------------------------------------------------------------------------- -void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par) -{ +void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par) { uint16_t paritybit_cnt = 0; uint16_t paritybyte_cnt = 0; uint8_t parityBits = 0; @@ -180,21 +179,13 @@ void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par) } // save remaining parity bits - par[paritybyte_cnt] = parityBits; - + par[paritybyte_cnt] = parityBits; } -void AppendCrc14443a(uint8_t* data, int len) -{ +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 //============================================================================= @@ -226,8 +217,7 @@ const bool Mod_Miller_LUT[] = { #define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4]) #define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)]) -void UartReset() -{ +void UartReset() { Uart.state = STATE_UNSYNCD; Uart.bitCount = 0; Uart.len = 0; // number of decoded data bytes @@ -242,8 +232,7 @@ void UartReset() Uart.syncBit = 9999; } -void UartInit(uint8_t *data, uint8_t *parity) -{ +void UartInit(uint8_t *data, uint8_t *parity) { Uart.output = data; Uart.parity = parity; Uart.fourBits = 0x00000000; // clear the buffer for 4 Bits @@ -251,14 +240,11 @@ void UartInit(uint8_t *data, uint8_t *parity) } // use parameter non_real_time to provide a timestamp. Set to 0 if the decoder should measure real time -static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) -{ - +static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) { Uart.fourBits = (Uart.fourBits << 8) | bit; if (Uart.state == STATE_UNSYNCD) { // not yet synced - - Uart.syncBit = 9999; // not set + 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") @@ -282,12 +268,11 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) 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; - } - + 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.fourBits >> Uart.syncBit)) { @@ -373,14 +358,10 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) } } } - } - return FALSE; // not finished yet, need more data } - - //============================================================================= // ISO 14443 Type A - Manchester decoder //============================================================================= @@ -408,9 +389,7 @@ const bool Mod_Manchester_LUT[] = { #define IsManchesterModulationNibble1(b) (Mod_Manchester_LUT[(b & 0x00F0) >> 4]) #define IsManchesterModulationNibble2(b) (Mod_Manchester_LUT[(b & 0x000F)]) - -void DemodReset() -{ +void DemodReset() { Demod.state = DEMOD_UNSYNCD; Demod.len = 0; // number of decoded data bytes Demod.parityLen = 0; @@ -420,25 +399,20 @@ void DemodReset() Demod.twoBits = 0xffff; // buffer for 2 Bits Demod.highCnt = 0; Demod.startTime = 0; - Demod.endTime = 0; - - // + Demod.endTime = 0; Demod.bitCount = 0; Demod.syncBit = 0xFFFF; Demod.samples = 0; } -void DemodInit(uint8_t *data, uint8_t *parity) -{ +void DemodInit(uint8_t *data, uint8_t *parity) { Demod.output = data; Demod.parity = parity; DemodReset(); } // use parameter non_real_time to provide a timestamp. Set to 0 if the decoder should measure real time -static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non_real_time) -{ - +static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non_real_time) { Demod.twoBits = (Demod.twoBits << 8) | bit; if (Demod.state == DEMOD_UNSYNCD) { @@ -466,7 +440,6 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non Demod.state = DEMOD_MANCHESTER_DATA; } } - } else { if (IsManchesterModulationNibble1(Demod.twoBits >> Demod.syncBit)) { // modulation in first half @@ -548,9 +521,7 @@ void RAMFUNC SniffIso14443a(uint8_t param) { // Allocate memory from BigBuf for some buffers // free all previous allocations first - BigBuf_free(); - - // init trace buffer + BigBuf_free(); BigBuf_Clear_ext(false); clear_trace(); set_tracing(TRUE); @@ -675,7 +646,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) { DemodReset(); // And reset the Miller decoder including itS (now outdated) input buffer UartInit(receivedCmd, receivedCmdPar); - LED_C_OFF(); } TagIsActive = (Demod.state != DEMOD_UNSYNCD); @@ -696,14 +666,14 @@ void RAMFUNC SniffIso14443a(uint8_t param) { 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]); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); set_tracing(FALSE); } //----------------------------------------------------------------------------- // Prepare tag messages //----------------------------------------------------------------------------- -static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *parity) -{ +static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *parity) { ToSendReset(); // Correction bit, might be removed when not needed @@ -747,21 +717,17 @@ static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *par ToSend[++ToSendMax] = SEC_F; // Convert from last byte pos to length - ToSendMax++; + ++ToSendMax; } -static void CodeIso14443aAsTag(const uint8_t *cmd, uint16_t len) -{ - uint8_t par[MAX_PARITY_SIZE]; - +static void CodeIso14443aAsTag(const uint8_t *cmd, uint16_t len) { + uint8_t par[MAX_PARITY_SIZE] = {0}; GetParity(cmd, len, par); CodeIso14443aAsTagPar(cmd, len, par); } - -static void Code4bitAnswerAsTag(uint8_t cmd) -{ - int i; +static void Code4bitAnswerAsTag(uint8_t cmd) { + uint8_t b = cmd; ToSendReset(); @@ -778,8 +744,7 @@ static void Code4bitAnswerAsTag(uint8_t cmd) // Send startbit ToSend[++ToSendMax] = SEC_D; - uint8_t b = cmd; - for(i = 0; i < 4; i++) { + for(uint8_t i = 0; i < 4; i++) { if(b & 1) { ToSend[++ToSendMax] = SEC_D; LastProxToAirDuration = 8 * ToSendMax - 4; @@ -802,15 +767,14 @@ static void Code4bitAnswerAsTag(uint8_t cmd) // Stop when button is pressed // Or return TRUE when command is captured //----------------------------------------------------------------------------- -static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) -{ +static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) { // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen // only, since we are receiving, not transmitting). // Signal field is off with the appropriate LED LED_D_OFF(); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - // Now run a `software UART' on the stream of incoming samples. + // Now run a `software UART` on the stream of incoming samples. UartInit(received, parity); // clear RXRDY: @@ -831,26 +795,6 @@ static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int } } -static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded); -int EmSend4bitEx(uint8_t resp, bool correctionNeeded); -int EmSend4bit(uint8_t resp); -int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par); -int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded); -int EmSendCmd(uint8_t *resp, uint16_t respLen); -int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par); -bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity, - uint8_t *tag_data, uint16_t tag_len, uint32_t tag_StartTime, uint32_t tag_EndTime, uint8_t *tag_Parity); - -static uint8_t* free_buffer_pointer; - -typedef struct { - uint8_t* response; - size_t response_n; - uint8_t* modulation; - size_t modulation_n; - uint32_t ProxToAirDuration; -} tag_response_info_t; - bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffer_size) { // Example response, answer to MIFARE Classic read block will be 16 bytes + 2 CRC = 18 bytes // This will need the following byte array for a modulation sequence @@ -862,28 +806,24 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe // ----------- + // 166 bytes, since every bit that needs to be send costs us a byte // - - - // Prepare the tag modulation bits from the message - CodeIso14443aAsTag(response_info->response,response_info->response_n); - - // Make sure we do not exceed the free buffer space - if (ToSendMax > max_buffer_size) { - Dbprintf("Out of memory, when modulating bits for tag answer:"); - Dbhexdump(response_info->response_n,response_info->response,false); - return false; - } - - // Copy the byte array, used for this modulation to the buffer position - memcpy(response_info->modulation,ToSend,ToSendMax); - - // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them - response_info->modulation_n = ToSendMax; - response_info->ProxToAirDuration = LastProxToAirDuration; - - return true; -} + // Prepare the tag modulation bits from the message + CodeIso14443aAsTag(response_info->response,response_info->response_n); + // Make sure we do not exceed the free buffer space + if (ToSendMax > max_buffer_size) { + Dbprintf("Out of memory, when modulating bits for tag answer:"); + Dbhexdump(response_info->response_n,response_info->response,false); + return FALSE; + } + + // Copy the byte array, used for this modulation to the buffer position + memcpy(response_info->modulation,ToSend,ToSendMax); + + // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them + response_info->modulation_n = ToSendMax; + response_info->ProxToAirDuration = LastProxToAirDuration; + return TRUE; +} // "precompile" responses. There are 7 predefined responses with a total of 28 bytes data to transmit. // Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) @@ -894,84 +834,71 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe #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 - response_info->modulation = free_buffer_pointer; - - // Determine the maximum size we can use from our buffer - size_t max_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE; - - // Forward the prepare tag modulation function to the inner function - if (prepare_tag_modulation(response_info, max_buffer_size)) { - // Update the free buffer offset - free_buffer_pointer += ToSendMax; - return true; - } else { - return false; - } + // Retrieve and store the current buffer index + response_info->modulation = free_buffer_pointer; + + // Determine the maximum size we can use from our buffer + size_t max_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE; + + // Forward the prepare tag modulation function to the inner function + if (prepare_tag_modulation(response_info, max_buffer_size)) { + // Update the free buffer offset + free_buffer_pointer += ToSendMax; + return true; + } else { + return false; + } } //----------------------------------------------------------------------------- // Main loop of simulated tag: receive commands from reader, decide what // response to send, and send it. //----------------------------------------------------------------------------- -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 +void SimulateIso14443aTag(int tagType, int flags, byte_t* data) { + + //Here, we collect CUID, NT, AR, NR, 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[] = {0,0,0,0,0,0,0,0,0,0}; uint8_t ar_nr_collected = 0; - - uint8_t sak; + uint8_t sak = 0; // PACK response to PWD AUTH for EV1/NTAG - uint8_t response8[4] = {0,0,0,0}; + uint8_t response8[4] = {0,0,0,0}; + // Counter for EV1/NTAG + uint32_t counters[] = {0,0,0}; // The first response contains the ATQA (note: bytes are transmitted in reverse order). - uint8_t response1[2] = {0,0}; + uint8_t response1[] = {0,0}; switch (tagType) { - case 1: { // MIFARE Classic - // Says: I am Mifare 1k - original line + case 1: { // MIFARE Classic 1k response1[0] = 0x04; - response1[1] = 0x00; sak = 0x08; } break; case 2: { // MIFARE Ultralight - // Says: I am a stupid memory tag, no crypto response1[0] = 0x44; - response1[1] = 0x00; sak = 0x00; } break; case 3: { // MIFARE DESFire - // Says: I am a DESFire tag, ph33r me response1[0] = 0x04; response1[1] = 0x03; sak = 0x20; } break; - case 4: { // ISO/IEC 14443-4 - // Says: I am a javacard (JCOP) + case 4: { // ISO/IEC 14443-4 - javacard (JCOP) response1[0] = 0x04; - response1[1] = 0x00; sak = 0x28; } break; case 5: { // MIFARE TNP3XXX - // Says: I am a toy response1[0] = 0x01; response1[1] = 0x0f; sak = 0x01; } break; - case 6: { // MIFARE Mini - // Says: I am a Mifare Mini, 320b + case 6: { // MIFARE Mini 320b response1[0] = 0x44; - response1[1] = 0x00; sak = 0x09; } break; - case 7: { // NTAG? - // Says: I am a NTAG, + case 7: { // NTAG response1[0] = 0x44; - response1[1] = 0x00; sak = 0x00; // PACK response8[0] = 0x80; @@ -996,11 +923,11 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) // The second response contains the (mandatory) first 24 bits of the UID uint8_t response2[5] = {0x00}; - // Check if the uid uses the (optional) part + // For UID size 7, uint8_t response2a[5] = {0x00}; if (flags & FLAG_7B_UID_IN_DATA) { - response2[0] = 0x88; + response2[0] = 0x88; // Cascade Tag marker response2[1] = data[0]; response2[2] = data[1]; response2[3] = data[2]; @@ -1016,7 +943,6 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) sak |= 0x04; } else { memcpy(response2, data, 4); - //num_to_bytes(uid_1st,4,response2); // Configure the ATQA and SAK accordingly response1[0] &= 0xBF; sak &= 0xFB; @@ -1026,8 +952,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) response2[4] = response2[0] ^ response2[1] ^ response2[2] ^ response2[3]; // Prepare the mandatory SAK (for 4 and 7 byte UID) - uint8_t response3[3] = {0x00}; - response3[0] = sak; + uint8_t response3[3] = {sak, 0x00, 0x00}; ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); // Prepare the optional second SAK (for 7 byte UID), drop the cascade bit @@ -1035,8 +960,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) response3a[0] = sak & 0xFB; ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); - 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: + uint8_t response5[] = { 0x01, 0x01, 0x01, 0x01 }; // 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 // TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us) @@ -1045,8 +970,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) // Prepare GET_VERSION (different for UL 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 - + //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}; @@ -1059,10 +983,12 @@ void SimulateIso14443aTag(int tagType, int flags, 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 = response7_NTAG, .response_n = sizeof(response7_NTAG)}, // EV1/NTAG GET_VERSION 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 // Such a response is less time critical, so we can prepare them on the fly @@ -1081,16 +1007,14 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN); BigBuf_free_keep_EM(); + clear_trace(); + set_tracing(TRUE); // allocate buffers: uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE); free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE); - // clear trace - clear_trace(); - set_tracing(TRUE); - // Prepare the responses of the anticollision phase // there will be not enough time to do this at the moment the reader sends it REQA for (size_t i=0; i 0) { @@ -1188,7 +1102,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) } EmSendCmdEx(data,sizeof(data),false); p_response = NULL; - } else if (receivedCmd[0] == 0xA5 && tagType == 7) { // Received a INC COUNTER -- + } else if (receivedCmd[0] == MIFARE_ULEV1_INCR_CNT && tagType == 7) { // Received a INC COUNTER -- // number of counter uint8_t counter = receivedCmd[1]; uint32_t val = bytes_to_num(receivedCmd+2,4); @@ -1197,9 +1111,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) // 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 = NULL; + } else if(receivedCmd[0] == MIFARE_ULEV1_CHECKTEAR && tagType == 7) { // Received a CHECK_TEARING_EVENT -- //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature] uint8_t emdata[3]; uint8_t counter=0; @@ -1207,13 +1120,11 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) emlGetMemBt( emdata, 10+counter, 1); AppendCrc14443a(emdata, sizeof(emdata)-2); EmSendCmdEx(emdata, sizeof(emdata), false); - p_response = NULL; - //p_response = &responses[9]; - - } else if(receivedCmd[0] == 0x50) { // Received a HALT + p_response = NULL; + } else if(receivedCmd[0] == ISO14443A_CMD_HALT) { // Received a HALT LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); p_response = NULL; - } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) { // Received an authentication request + } else if(receivedCmd[0] == MIFARE_AUTH_KEYA || receivedCmd[0] == MIFARE_AUTH_KEYB) { // Received an authentication request if ( tagType == 7 ) { // IF NTAG /EV1 0x60 == GET_VERSION, not a authentication request. uint8_t emdata[10]; @@ -1221,11 +1132,10 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) AppendCrc14443a(emdata, sizeof(emdata)-2); EmSendCmdEx(emdata, sizeof(emdata), false); p_response = NULL; - //p_response = &responses[7]; } else { p_response = &responses[5]; order = 7; } - } else if(receivedCmd[0] == 0xE0) { // Received a RATS request + } else if(receivedCmd[0] == ISO14443A_CMD_RATS) { // Received a RATS request if (tagType == 1 || tagType == 2) { // RATS not supported EmSend4bit(CARD_NACK_NA); p_response = NULL; @@ -1237,45 +1147,30 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) uint32_t nonce = bytes_to_num(response5,4); uint32_t nr = bytes_to_num(receivedCmd,4); uint32_t ar = bytes_to_num(receivedCmd+4,4); - //Dbprintf("Auth attempt {nonce}{nr}{ar}: %08x %08x %08x", nonce, nr, ar); - if(flags & FLAG_NR_AR_ATTACK ) - { + if(flags & FLAG_NR_AR_ATTACK ) { if(ar_nr_collected < 2){ // Avoid duplicates... probably not necessary, nr should vary. //if(ar_nr_responses[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_responses[ar_nr_collected*4] = 0; + ar_nr_responses[ar_nr_collected*4+1] = nonce; + ar_nr_responses[ar_nr_collected*4+2] = nr; + ar_nr_responses[ar_nr_collected*4+3] = ar; ar_nr_collected++; //} } - if(ar_nr_collected > 1 ) { - + if(ar_nr_collected > 1 ) { if (MF_DBGLEVEL >= 2) { Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:"); - Dbprintf("../tools/mfkey/mfkey32 %07x%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/mfkey32 %08x %08x %08x %08x %08x %08x", + ar_nr_responses[0], // CUID + 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/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); @@ -1283,12 +1178,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) memset(ar_nr_responses, 0x00, len); } } - } else if (receivedCmd[0] == 0x1a ) // ULC authentication - { - - } - else if (receivedCmd[0] == 0x1b) // NTAG / EV-1 authentication - { + } else if (receivedCmd[0] == MIFARE_ULC_AUTH_1 ) { // ULC authentication, or Desfire Authentication + } else if (receivedCmd[0] == MIFARE_ULEV1_AUTH) { // NTAG / EV-1 authentication if ( tagType == 7 ) { uint16_t start = 13; //first 4 blocks of emu are [getversion answer - check tearing - pack - 0x00] uint8_t emdata[4]; @@ -1296,10 +1187,9 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) AppendCrc14443a(emdata, 2); EmSendCmdEx(emdata, sizeof(emdata), false); p_response = NULL; - //p_response = &responses[8]; // PACK response uint32_t pwd = bytes_to_num(receivedCmd+1,4); - if ( MF_DBGLEVEL >= 3) 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 @@ -1378,6 +1268,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) // Count number of other messages after a halt if(order != 6 && lastorder == 5) { happened2++; } + // comment this limit if you want to simulation longer if(cmdsRecvd > 999) { DbpString("1000 commands later..."); break; @@ -1401,7 +1292,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) (LastTimeProxToAirStart + p_response->ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, par); } - + + // comment this limit if you want to simulation longer if (!tracing) { Dbprintf("Trace Full. Simulation stopped."); break; @@ -1420,29 +1312,29 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) } } - // prepare a delayed transfer. This simply shifts ToSend[] by a number // of bits specified in the delay parameter. -void PrepareDelayedTransfer(uint16_t delay) -{ +void PrepareDelayedTransfer(uint16_t delay) { + delay &= 0x07; + if (!delay) return; + uint8_t bitmask = 0; uint8_t bits_to_shift = 0; uint8_t bits_shifted = 0; + uint16_t i = 0; - delay &= 0x07; - if (delay) { - for (uint16_t i = 0; i < delay; i++) { - bitmask |= (0x01 << i); - } - ToSend[ToSendMax++] = 0x00; - for (uint16_t i = 0; i < ToSendMax; i++) { + for (i = 0; i < delay; ++i) + bitmask |= (0x01 << i); + + ToSend[++ToSendMax] = 0x00; + + for (i = 0; i < ToSendMax; ++i) { bits_to_shift = ToSend[i] & bitmask; ToSend[i] = ToSend[i] >> delay; ToSend[i] = ToSend[i] | (bits_shifted << (8 - delay)); bits_shifted = bits_to_shift; } } -} //------------------------------------------------------------------------------------- @@ -1453,8 +1345,7 @@ void PrepareDelayedTransfer(uint16_t delay) // if == 0: transfer immediately and return time of transfer // if != 0: delay transfer until time specified //------------------------------------------------------------------------------------- -static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing) -{ +static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing) { FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); uint32_t ThisTransferTime = 0; @@ -1470,7 +1361,9 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing LastTimeProxToAirStart = *timing; } else { ThisTransferTime = ((MAX(NextTransferTime, GetCountSspClk()) & 0xfffffff8) + 8); + while(GetCountSspClk() < ThisTransferTime); + LastTimeProxToAirStart = ThisTransferTime; } @@ -1481,7 +1374,7 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing for(;;) { if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = cmd[c]; - c++; + ++c; if(c >= len) break; } @@ -1490,7 +1383,6 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing NextTransferTime = MAX(NextTransferTime, LastTimeProxToAirStart + REQUEST_GUARD_TIME); } - //----------------------------------------------------------------------------- // Prepare reader command (in bits, support short frames) to send to FPGA //----------------------------------------------------------------------------- @@ -1568,25 +1460,22 @@ void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8 ToSend[++ToSendMax] = SEC_Y; // Convert to length of command: - ToSendMax++; + ++ToSendMax; } //----------------------------------------------------------------------------- // Prepare reader command to send to FPGA //----------------------------------------------------------------------------- -void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *parity) -{ +void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *parity) { CodeIso14443aBitsAsReaderPar(cmd, len*8, parity); } - //----------------------------------------------------------------------------- // Wait for commands from reader // Stop when button is pressed (return 1) or field was gone (return 2) // Or return 0 when command is captured //----------------------------------------------------------------------------- -static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) -{ +static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) { *len = 0; uint32_t timer = 0, vtime = 0; @@ -1646,13 +1535,10 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) return 0; } } - } } - -static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded) -{ +int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded) { uint8_t b; uint16_t i = 0; uint32_t ThisTransferTime; @@ -1664,12 +1550,8 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe if (Uart.parityBits & 0x01) { correctionNeeded = TRUE; } - if(correctionNeeded) { - // 1236, so correction bit needed - i = 0; - } else { - i = 1; - } + // 1236, so correction bit needed + i = (correctionNeeded) ? 0 : 1; // clear receiving shift register and holding register while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); @@ -1699,7 +1581,7 @@ 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: - uint8_t fpga_queued_bits = FpgaSendQueueDelay >> 3; + uint8_t fpga_queued_bits = FpgaSendQueueDelay >> 3; // twich /8 ?? >>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; @@ -1707,9 +1589,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe i++; } } - LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded?8:0); - return 0; } @@ -1793,8 +1673,7 @@ bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_Start // If a response is captured return TRUE // If it takes too long return FALSE //----------------------------------------------------------------------------- -static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset) -{ +static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset) { uint32_t c = 0x00; // Set FPGA mode to "reader listen mode", no modulation (listen @@ -1824,54 +1703,46 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive } } -void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) -{ +void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) { CodeIso14443aBitsAsReaderPar(frame, bits, par); // Send command to tag TransmitFor14443a(ToSend, ToSendMax, timing); - if(trigger) - LED_A_ON(); + if(trigger) LED_A_ON(); // Log reader command in trace buffer - LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, TRUE); + //LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, TRUE); + LogTrace(frame, nbytes(bits), (LastTimeProxToAirStart<<4) + DELAY_ARM2AIR_AS_READER, ((LastTimeProxToAirStart + LastProxToAirDuration)<<4) + DELAY_ARM2AIR_AS_READER, par, TRUE); } -void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing) -{ +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) -{ +void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing) { // Generate parity and redirect uint8_t par[MAX_PARITY_SIZE] = {0x00}; - GetParity(frame, len/8, par); + GetParity(frame, len/8, par); ReaderTransmitBitsPar(frame, len, par, timing); } -void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing) -{ +void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing) { // Generate parity and redirect uint8_t par[MAX_PARITY_SIZE] = {0x00}; GetParity(frame, len, par); ReaderTransmitBitsPar(frame, len*8, par, timing); } -int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity) -{ - if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) +int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity) { + if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) return FALSE; - LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, FALSE); return Demod.len; } -int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity) -{ - if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) +int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity) { + if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) return FALSE; - LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, FALSE); return Demod.len; } @@ -1886,10 +1757,10 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u uint8_t sel_all[] = { 0x93,0x20 }; uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0 - uint8_t resp[MAX_FRAME_SIZE]; // theoretically. A usual RATS will be much smaller - uint8_t resp_par[MAX_PARITY_SIZE]; - byte_t uid_resp[4]; - size_t uid_resp_len; + uint8_t resp[MAX_FRAME_SIZE] = {0}; // theoretically. A usual RATS will be much smaller + uint8_t resp_par[MAX_PARITY_SIZE] = {0}; + byte_t uid_resp[4] = {0}; + size_t uid_resp_len = 0; uint8_t sak = 0x04; // cascade uid int cascade_level = 0; @@ -1908,16 +1779,13 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u } if (anticollision) { - // clear uid - if (uid_ptr) { - memset(uid_ptr,0,10); - } + // clear uid + if (uid_ptr) + memset(uid_ptr,0,10); } // check for proprietary anticollision: - if ((resp[0] & 0x1F) == 0) { - return 3; - } + 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 @@ -1928,40 +1796,41 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u if (anticollision) { // SELECT_ALL - ReaderTransmit(sel_all, sizeof(sel_all), NULL); - if (!ReaderReceive(resp, resp_par)) return 0; - - if (Demod.collisionPos) { // we had a collision and need to construct the UID bit by bit - memset(uid_resp, 0, 4); - uint16_t uid_resp_bits = 0; - uint16_t collision_answer_offset = 0; - // anti-collision-loop: - while (Demod.collisionPos) { - Dbprintf("Multiple tags detected. Collision after Bit %d", Demod.collisionPos); - for (uint16_t i = collision_answer_offset; i < Demod.collisionPos; i++, uid_resp_bits++) { // add valid UID bits before collision point - uint16_t UIDbit = (resp[i/8] >> (i % 8)) & 0x01; - uid_resp[uid_resp_bits / 8] |= UIDbit << (uid_resp_bits % 8); + ReaderTransmit(sel_all, sizeof(sel_all), NULL); + if (!ReaderReceive(resp, resp_par)) return 0; + + if (Demod.collisionPos) { // we had a collision and need to construct the UID bit by bit + memset(uid_resp, 0, 4); + uint16_t uid_resp_bits = 0; + uint16_t collision_answer_offset = 0; + // anti-collision-loop: + while (Demod.collisionPos) { + Dbprintf("Multiple tags detected. Collision after Bit %d", Demod.collisionPos); + for (uint16_t i = collision_answer_offset; i < Demod.collisionPos; i++, uid_resp_bits++) { // add valid UID bits before collision point + uint16_t UIDbit = (resp[i/8] >> (i % 8)) & 0x01; + uid_resp[uid_resp_bits / 8] |= UIDbit << (uid_resp_bits % 8); + } + uid_resp[uid_resp_bits/8] |= 1 << (uid_resp_bits % 8); // next time select the card(s) with a 1 in the collision position + uid_resp_bits++; + // construct anticollosion command: + sel_uid[1] = ((2 + uid_resp_bits/8) << 4) | (uid_resp_bits & 0x07); // length of data in bytes and bits + for (uint16_t i = 0; i <= uid_resp_bits/8; i++) { + sel_uid[2+i] = uid_resp[i]; + } + collision_answer_offset = uid_resp_bits%8; + ReaderTransmitBits(sel_uid, 16 + uid_resp_bits, NULL); + if (!ReaderReceiveOffset(resp, collision_answer_offset, resp_par)) return 0; } - uid_resp[uid_resp_bits/8] |= 1 << (uid_resp_bits % 8); // next time select the card(s) with a 1 in the collision position - uid_resp_bits++; - // construct anticollosion command: - sel_uid[1] = ((2 + uid_resp_bits/8) << 4) | (uid_resp_bits & 0x07); // length of data in bytes and bits - for (uint16_t i = 0; i <= uid_resp_bits/8; i++) { - sel_uid[2+i] = uid_resp[i]; + // finally, add the last bits and BCC of the UID + for (uint16_t i = collision_answer_offset; i < (Demod.len-1)*8; i++, uid_resp_bits++) { + uint16_t UIDbit = (resp[i/8] >> (i%8)) & 0x01; + uid_resp[uid_resp_bits/8] |= UIDbit << (uid_resp_bits % 8); } - collision_answer_offset = uid_resp_bits%8; - ReaderTransmitBits(sel_uid, 16 + uid_resp_bits, NULL); - if (!ReaderReceiveOffset(resp, collision_answer_offset, resp_par)) return 0; - } - // finally, add the last bits and BCC of the UID - for (uint16_t i = collision_answer_offset; i < (Demod.len-1)*8; i++, uid_resp_bits++) { - uint16_t UIDbit = (resp[i/8] >> (i%8)) & 0x01; - uid_resp[uid_resp_bits/8] |= UIDbit << (uid_resp_bits % 8); - } - } else { // no collision, use the response to SELECT_ALL as current uid - memcpy(uid_resp, resp, 4); - } + } else { // no collision, use the response to SELECT_ALL as current uid + memcpy(uid_resp, resp, 4); + } + } else { if (cascade_level < num_cascades - 1) { uid_resp[0] = 0x88; @@ -1973,9 +1842,8 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u uid_resp_len = 4; // calculate crypto UID. Always use last 4 Bytes. - if(cuid_ptr) { + if(cuid_ptr) *cuid_ptr = bytes_to_num(uid_resp, 4); - } // Construct SELECT UID command sel_uid[1] = 0x70; // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC) @@ -1986,6 +1854,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u // Receive the SAK if (!ReaderReceive(resp, resp_par)) return 0; + sak = resp[0]; // Test if more parts of the uid are coming @@ -1998,9 +1867,8 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u uid_resp_len = 3; } - if(uid_ptr && anticollision) { + if(uid_ptr && anticollision) memcpy(uid_ptr + (cascade_level*3), uid_resp, uid_resp_len); - } if(p_hi14a_card) { memcpy(p_hi14a_card->uid + (cascade_level*3), uid_resp, uid_resp_len); @@ -2021,7 +1889,6 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u ReaderTransmit(rats, sizeof(rats), NULL); if (!(len = ReaderReceive(resp, resp_par))) return 0; - if(p_hi14a_card) { memcpy(p_hi14a_card->ats, resp, sizeof(p_hi14a_card->ats)); @@ -2044,22 +1911,25 @@ void iso14443a_setup(uint8_t fpga_minor_mode) { // connect Demodulated Signal to ADC: SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | fpga_minor_mode); + + LED_D_OFF(); // Signal field is on with the appropriate LED - if (fpga_minor_mode == FPGA_HF_ISO14443A_READER_MOD - || fpga_minor_mode == FPGA_HF_ISO14443A_READER_LISTEN) { + if (fpga_minor_mode == FPGA_HF_ISO14443A_READER_MOD || + fpga_minor_mode == FPGA_HF_ISO14443A_READER_LISTEN) LED_D_ON(); - } else { - LED_D_OFF(); - } - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | fpga_minor_mode); - // Start the timer - StartCountSspClk(); - + // Prepare the demodulation functions DemodReset(); UartReset(); - NextTransferTime = 2*DELAY_ARM2AIR_AS_READER; + iso14a_set_timeout(10*106); // 10ms default + + //NextTransferTime = 2 * DELAY_ARM2AIR_AS_READER; + NextTransferTime = DELAY_ARM2AIR_AS_READER << 1; + + // Start the timer + StartCountSspClk(); } int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) { @@ -2074,12 +1944,14 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) { ReaderTransmit(real_cmd, cmd_len+4, NULL); size_t len = ReaderReceive(data, parity); + //DATA LINK ERROR + if (!len) return 0; + uint8_t *data_bytes = (uint8_t *) data; - if (!len) - return 0; //DATA LINK ERROR + // if we received an I- or R(ACK)-Block with a block number equal to the // current block number, toggle the current block number - else if (len >= 4 // PCB+CID+CRC = 4 bytes + if (len >= 4 // PCB+CID+CRC = 4 bytes && ((data_bytes[0] & 0xC0) == 0 // I-Block || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0 && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers @@ -2094,13 +1966,12 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) { // Read an ISO 14443a tag. Send out commands and store answers. // //----------------------------------------------------------------------------- -void ReaderIso14443a(UsbCommand *c) -{ +void ReaderIso14443a(UsbCommand *c) { iso14a_command_t param = c->arg[0]; - uint8_t *cmd = c->d.asBytes; size_t len = c->arg[1] & 0xffff; size_t lenbits = c->arg[1] >> 16; uint32_t timeout = c->arg[2]; + uint8_t *cmd = c->d.asBytes; uint32_t arg0 = 0; byte_t buf[USB_CMD_DATA_SIZE] = {0x00}; uint8_t par[MAX_PARITY_SIZE] = {0x00}; @@ -2113,13 +1984,14 @@ void ReaderIso14443a(UsbCommand *c) if (param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(TRUE); - if (param & ISO14A_CONNECT) { iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN); if(!(param & ISO14A_NO_SELECT)) { iso14a_card_select_t *card = (iso14a_card_select_t*)buf; arg0 = iso14443a_select_card(NULL,card,NULL, true, 0); - cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t)); + cmd_send(CMD_ACK, arg0, card->uidlen, 0, buf, sizeof(iso14a_card_select_t)); + // if it fails, the cmdhf14a.c client quites.. however this one still executes. + if ( arg0 == 0 ) return; } } @@ -2173,7 +2045,6 @@ void ReaderIso14443a(UsbCommand *c) if (param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(FALSE); - if (param & ISO14A_NO_DISCONNECT) return; @@ -2182,7 +2053,6 @@ void ReaderIso14443a(UsbCommand *c) LEDsoff(); } - // Determine the distance between two nonces. // Assume that the difference is small, but we don't know which is first. // Therefore try in alternating directions. @@ -2193,104 +2063,105 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) { uint16_t i; uint32_t nttmp1 = nt1; uint32_t nttmp2 = nt2; - - for (i = 1; i < 0xFFFF; ++i) { + + for (i = 1; i < (32768/8); ++i) { nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i; - nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -i; - } - - return(-99999); // either nt1 or nt2 are invalid nonces + + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+1; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+1); + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+2; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+2); + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+3; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+3); + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+4; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+4); + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+5; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+5); + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+6; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+6); + nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+7; + nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+7); + } + // either nt1 or nt2 are invalid nonces + return(-99999); } - //----------------------------------------------------------------------------- // Recover several bits of the cypher stream. This implements (first stages of) // the algorithm described in "The Dark Side of Security by Obscurity and // Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime" // (article by Nicolas T. Courtois, 2009) //----------------------------------------------------------------------------- -void ReaderMifare(bool first_try, uint8_t block ) -{ - // Mifare AUTH - //uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; - //uint8_t mf_auth[] = { 0x60,0x05, 0x58, 0x2c }; - uint8_t mf_auth[] = { 0x60,0x00, 0x00, 0x00 }; - uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; - static uint8_t mf_nr_ar3; - - mf_auth[1] = block; - AppendCrc14443a(mf_auth, 2); - +void ReaderMifare(bool first_try, uint8_t block ) { + //uint8_t mf_auth[] = { MIFARE_AUTH_KEYA,0x00,0xf5,0x7b }; + uint8_t mf_auth[] = { MIFARE_AUTH_KEYA, block, 0x00, 0x00 }; + uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; + uint8_t uid[10] = {0,0,0,0,0,0,0,0,0,0}; + uint8_t par_list[8] = {0,0,0,0,0,0,0,0}; + uint8_t ks_list[8] = {0,0,0,0,0,0,0,0}; uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00}; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00}; - - 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); - - 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] = {0}; + byte_t nt_diff = 0; + uint32_t nt = 0; + uint32_t previous_nt = 0; uint32_t cuid = 0; + + int32_t catch_up_cycles = 0; + int32_t last_catch_up = 0; + int32_t isOK = 0; + int32_t nt_distance = 0; + + uint16_t elapsed_prng_sequences = 1; + uint16_t consecutive_resyncs = 0; + uint16_t unexpected_random = 0; + uint16_t sync_tries = 0; - uint32_t nt = 0; - uint32_t previous_nt = 0; + // static variables here, is re-used in the next call? static uint32_t nt_attacked = 0; - 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 int32_t sync_cycles = 0; - int catch_up_cycles = 0; - int last_catch_up = 0; - uint16_t elapsed_prng_sequences = 0; - uint16_t consecutive_resyncs = 0; - int isOK = 0; + static uint32_t sync_cycles = 0; + static uint8_t par_low = 0; + static uint8_t mf_nr_ar3 = 0; + + #define PRNG_SEQUENCE_LENGTH (1 << 16) + #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 MAX_STRATEGY 3 + BigBuf_free(); BigBuf_Clear_ext(false); + clear_trace(); + set_tracing(TRUE); + iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); + + AppendCrc14443a(mf_auth, 2); + if (first_try) { - mf_nr_ar3 = 0; sync_time = GetCountSspClk() & 0xfffffff8; - sync_cycles = PRNG_SEQUENCE_LENGTH; //65536; //0x10000 // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces). + sync_cycles = PRNG_SEQUENCE_LENGTH + 1130; //65536; //0x10000 // Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces). + mf_nr_ar3 = 0; nt_attacked = 0; - par[0] = 0; - } - else { - // we were unsuccessful on a previous call. Try another READER nonce (first 3 parity bits remain the same) - mf_nr_ar3++; + par_low = 0; + + Dbprintf("FIRST: sync_time - %08X", sync_time); + } else { + // we were unsuccessful on a previous call. + // Try another READER nonce (first 3 parity bits remain the same) + ++mf_nr_ar3; mf_nr_ar[3] = mf_nr_ar3; par[0] = par_low; } - LED_A_ON(); - LED_B_OFF(); - LED_C_OFF(); - + bool have_uid = FALSE; + uint8_t cascade_levels = 0; + + LED_C_ON(); + uint16_t i; + for(i = 0; TRUE; ++i) { - #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 = 0; - uint32_t halt_time = 0; - - for(uint16_t i = 0; TRUE; ++i) { - - LED_C_ON(); WDT_HIT(); // Test if the action was cancelled @@ -2299,134 +2170,117 @@ void ReaderMifare(bool first_try, uint8_t block ) 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); + // this part is from Piwi's faster nonce collecting part in Hardnested. + if (!have_uid) { // need a full select cycle to get the uid first + iso14a_card_select_t card_info; + if(!iso14443a_select_card(uid, &card_info, &cuid, true, 0)) { + if (MF_DBGLEVEL >= 4) Dbprintf("Mifare: Can't select card (ALL)"); + break; + } + switch (card_info.uidlen) { + case 4 : cascade_levels = 1; break; + case 7 : cascade_levels = 2; break; + case 10: cascade_levels = 3; break; + default: break; + } + have_uid = TRUE; + } else { // no need for anticollision. We can directly select the card + if(!iso14443a_select_card(uid, NULL, &cuid, false, cascade_levels)) { + if (MF_DBGLEVEL >= 4) Dbprintf("Mifare: Can't select card (UID)"); + continue; } - } - - 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); - WDT_HIT(); } - if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) { - if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card"); - continue; - } - select_time = GetCountSspClk(); - - 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) { - 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); - - } 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)) { - if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Couldn't receive tag nonce"); + // Sending timeslot of ISO14443a frame + 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) { + ++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); + + // Receive the (4 Byte) "random" nonce from TAG + if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) continue; - } previous_nt = nt; nt = bytes_to_num(receivedAnswer, 4); - + // Transmit reader nonce with fake par ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL); - + + WDT_HIT(); + LED_B_ON(); if (first_try && previous_nt && !nt_attacked) { // we didn't calibrate our clock yet - int nt_distance = dist_nt(previous_nt, nt); + + nt_distance = dist_nt(previous_nt, nt); + + // if no distance between, then we are in sync. if (nt_distance == 0) { nt_attacked = nt; } else { if (nt_distance == -99999) { // invalid nonce received - unexpected_random++; + ++unexpected_random; if (unexpected_random > MAX_UNEXPECTED_RANDOM) { isOK = -3; // Card has an unpredictable PRNG. Give up break; - } else { + } else { + if (sync_cycles <= 0) sync_cycles += PRNG_SEQUENCE_LENGTH; + LED_B_OFF(); 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_nr; - debug_info[strategy][debug_info_nr] = nt_distance; - if (debug_info_nr == NUM_DEBUG_INFOS) { - ++strategy; - debug_info_nr = 0; - } - continue; - } + isOK = -4; // Card's PRNG runs at an unexpected frequency or resets unexpectedly + break; } - sync_cycles = (sync_cycles - nt_distance/elapsed_prng_sequences); - if (sync_cycles <= 0) { + + sync_cycles = (sync_cycles - nt_distance)/elapsed_prng_sequences; + + if (sync_cycles <= 0) sync_cycles += PRNG_SEQUENCE_LENGTH; - } - if (MF_DBGLEVEL >= 3) { + + if (MF_DBGLEVEL >= 4) 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); - } + + LED_B_OFF(); continue; } } + LED_B_OFF(); if ((nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again... - catch_up_cycles = -dist_nt(nt_attacked, nt); + + catch_up_cycles = ABS(dist_nt(nt_attacked, nt)); if (catch_up_cycles == 99999) { // invalid nonce received. Don't resync on that one. catch_up_cycles = 0; continue; - } + } + // average? catch_up_cycles /= elapsed_prng_sequences; + if (catch_up_cycles == last_catch_up) { ++consecutive_resyncs; - } - else { + } else { last_catch_up = catch_up_cycles; consecutive_resyncs = 0; - } + } + if (consecutive_resyncs < 3) { - if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, -catch_up_cycles, consecutive_resyncs); - } - 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); + if (MF_DBGLEVEL >= 4) + Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, catch_up_cycles, consecutive_resyncs); + } else { + sync_cycles += catch_up_cycles; + + if (MF_DBGLEVEL >= 4) + 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; @@ -2434,8 +2288,6 @@ void ReaderMifare(bool first_try, uint8_t block ) continue; } - 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)) { catch_up_cycles = 8; // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer @@ -2443,11 +2295,8 @@ void ReaderMifare(bool first_try, uint8_t block ) 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 - led_on = !led_on; - if(led_on) LED_B_ON(); else LED_B_OFF(); - par_list[nt_diff] = SwapBits(par[0], 8); - ks_list[nt_diff] = receivedAnswer[0] ^ 0x05; + ks_list[nt_diff] = receivedAnswer[0] ^ 0x05; // xor with NACK value to get keystream // Test if the information is complete if (nt_diff == 0x07) { @@ -2458,7 +2307,9 @@ void ReaderMifare(bool first_try, uint8_t block ) nt_diff = (nt_diff + 1) & 0x07; mf_nr_ar[3] = (mf_nr_ar[3] & 0x1F) | (nt_diff << 5); par[0] = par_low; + } else { + // No NACK. if (nt_diff == 0 && first_try) { par[0]++; if (par[0] == 0x00) { // tried all 256 possible parities without success. Card doesn't send NACK. @@ -2466,38 +2317,31 @@ void ReaderMifare(bool first_try, uint8_t block ) break; } } else { + // Why this? par[0] = ((par[0] & 0x1F) + 1) | par_low; } } - } + + // reset the resyncs since we got a complete transaction on right time. + consecutive_resyncs = 0; + } // end for loop mf_nr_ar[3] &= 0x1F; - WDT_HIT(); - - 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]); - } - } - } - } + if (MF_DBGLEVEL >= 1) Dbprintf("\nNumber of sent auth requestes: %u", i); - byte_t buf[28] = {0x00}; - memcpy(buf + 0, uid, 4); + uint8_t buf[28] = {0x00}; + memset(buf, 0x00, sizeof(buf)); + num_to_bytes(cuid, 4, buf); num_to_bytes(nt, 4, buf + 4); memcpy(buf + 8, par_list, 8); memcpy(buf + 16, ks_list, 8); memcpy(buf + 24, mf_nr_ar, 4); - cmd_send(CMD_ACK,isOK,0,0,buf,28); + cmd_send(CMD_ACK, isOK, 0, 0, buf, sizeof(buf) ); - // Thats it... FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LEDsoff(); - set_tracing(FALSE); } @@ -2505,111 +2349,174 @@ void ReaderMifare(bool first_try, uint8_t block ) *MIFARE 1K simulate. * *@param flags : - * FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK - * 4B_FLAG_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that - * 7B_FLAG_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that - * FLAG_NR_AR_ATTACK - means we should collect NR_AR responses for bruteforcing later + * FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK + * FLAG_4B_UID_IN_DATA - use 4-byte UID in the data-section + * FLAG_7B_UID_IN_DATA - use 7-byte UID in the data-section + * FLAG_10B_UID_IN_DATA - use 10-byte UID in the data-section + * FLAG_UID_IN_EMUL - use 4-byte UID from emulator memory + * FLAG_NR_AR_ATTACK - collect NR_AR responses for bruteforcing later *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is inifite */ -void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain) -{ +void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain) { int cardSTATE = MFEMUL_NOFIELD; - int _7BUID = 0; + int _UID_LEN = 0; // 4, 7, 10 int vHf = 0; // in mV - int res; + int res = 0; uint32_t selTimer = 0; uint32_t authTimer = 0; uint16_t len = 0; uint8_t cardWRBL = 0; uint8_t cardAUTHSC = 0; uint8_t cardAUTHKEY = 0xff; // no authentication -// uint32_t cardRr = 0; uint32_t cuid = 0; - //uint32_t rn_enc = 0; uint32_t ans = 0; uint32_t cardINTREG = 0; uint8_t cardINTBLOCK = 0; struct Crypto1State mpcs = {0, 0}; struct Crypto1State *pcs; pcs = &mpcs; - uint32_t numReads = 0;//Counts numer of times reader read a block + uint32_t numReads = 0; //Counts numer of times reader read a block uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00}; uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE] = {0x00}; uint8_t response[MAX_MIFARE_FRAME_SIZE] = {0x00}; uint8_t response_par[MAX_MIFARE_PARITY_SIZE] = {0x00}; - 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}; // Mifare Classic - //uint8_t rSAK[] = {0x09, 0x3f, 0xcc }; // Mifare Mini - uint8_t rSAK1[] = {0x04, 0xda, 0x17}; - - //uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01}; - uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92}; + uint8_t atqa[] = {0x04, 0x00}; // Mifare classic 1k (4b UID) + uint8_t sak_4[] = {0x08, 0x00, 0x00}; // Mifare Classic + uint8_t sak_7[] = {0x08, 0x00, 0x00}; // CL2 - 7b uid + uint8_t sak_10[] = {0x08, 0x00, 0x00}; // CL3 - 10b uid + //uint8_t sak[] = {0x09, 0x3f, 0xcc }; // Mifare Mini + + uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; + uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; + uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; + + uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01}; // very random nonce + //uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};// nonce from nested? why this? uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00}; - //Here, we collect UID1,UID2,NT,AR,NR,0,0,NT2,AR2,NR2 + // Here, we collect CUID, NT, AR, NR, 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[] = {0,0,0,0,0,0,0,0,0,0}; + uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0}; uint8_t ar_nr_collected = 0; // Authenticate response - nonce uint32_t nonce = bytes_to_num(rAUTH_NT, 4); //-- Determine the UID - // Can be set from emulator memory, incoming data - // and can be 7 or 4 bytes long - if (flags & FLAG_4B_UID_IN_DATA) - { - // 4B uid comes from data-portion of packet - memcpy(rUIDBCC1,datain,4); - rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; - + // Can be set from emulator memory or incoming data + // Length: 4,7,or 10 bytes + if ( flags & FLAG_UID_IN_EMUL ) { + emlGetMemBt(rUIDBCC1, 0, 4); + _UID_LEN = 4; + } else if (flags & FLAG_4B_UID_IN_DATA) { + memcpy(rUIDBCC1, datain, 4); + _UID_LEN = 4; } else if (flags & FLAG_7B_UID_IN_DATA) { - // 7B uid comes from data-portion of packet - memcpy(&rUIDBCC1[1],datain,3); - memcpy(rUIDBCC2, datain+3, 4); - _7BUID = true; - } else { - // get UID from emul memory - emlGetMemBt(receivedCmd, 7, 1); - _7BUID = !(receivedCmd[0] == 0x00); - if (!_7BUID) { // ---------- 4BUID - emlGetMemBt(rUIDBCC1, 0, 4); - } else { // ---------- 7BUID - emlGetMemBt(&rUIDBCC1[1], 0, 3); - emlGetMemBt(rUIDBCC2, 3, 4); - } + memcpy(&rUIDBCC1[1], datain, 3); + memcpy( rUIDBCC2, datain+3, 4); + _UID_LEN = 7; + } else if (flags & FLAG_10B_UID_IN_DATA) { + memcpy(&rUIDBCC1[1], datain, 3); + memcpy(&rUIDBCC2[1], datain+3, 4); + memcpy( rUIDBCC3, datain+7, 4); + _UID_LEN = 10; } - // 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 - */ - rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; - if (_7BUID) { - rATQA[0] = 0x44; - rUIDBCC1[0] = 0x88; - rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; - rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; - } - - if (MF_DBGLEVEL >= 1) { - if (!_7BUID) { - Dbprintf("4B UID: %02x%02x%02x%02x", - rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3]); - } else { - Dbprintf("7B UID: (%02x)%02x%02x%02x%02x%02x%02x%02x", - rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3], - rUIDBCC2[0], rUIDBCC2[1] ,rUIDBCC2[2], rUIDBCC2[3]); - } + * Save cuid to collected response array. + * Set XOR BCC (fifth byte) and modify the ATQA for 4,7 or 10-byte UID + atqa[] = 0x04, 0x00; + sak = 0x08; + if (flags & FLAG_7B_UID_IN_DATA) { + atqa[0] |= 0x40; + sak |= 0x04; + } else { + atqa[0] &= 0xBF; + sak &= 0xFB; + + // Prepare the mandatory SAK (for 4 and 7 byte UID) + uint8_t response3[3] = {sak, 0x00, 0x00}; + ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); + */ + switch (_UID_LEN) { + case 4: + atqa[0] &= 0xBF; + sak_4[0] &= 0xFB; + ComputeCrc14443(CRC_14443_A, sak_4, 1, &sak_4[1], &sak_4[2]); + + // save CUID + ar_nr_responses[0] = cuid = bytes_to_num(rUIDBCC1, 4); + // BCC + rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; + if (MF_DBGLEVEL >= 1) { + Dbprintf("4B UID: %02x%02x%02x%02x", + rUIDBCC1[0], + rUIDBCC1[1], + rUIDBCC1[2], + rUIDBCC1[3] + ); + } + break; + case 7: + atqa[0] |= 0x40; + sak_7[0] |= 0x04; + ComputeCrc14443(CRC_14443_A, sak_7, 1, &sak_7[1], &sak_7[2]); + + // save CUID + ar_nr_responses[0] = cuid = bytes_to_num(rUIDBCC2, 4); + + rUIDBCC1[0] = 0x88; // CascadeTag, CT + // BCC + rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; + rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; + if (MF_DBGLEVEL >= 1) { + Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x", + //rUIDBCC1[0], + rUIDBCC1[1], + rUIDBCC1[2], + rUIDBCC1[3], + rUIDBCC2[0], + rUIDBCC2[1], + rUIDBCC2[2], + rUIDBCC2[3] + ); + } + break; + case 10: + atqa[0] |= 0x40; + sak_10[0] |= 0x04; + ComputeCrc14443(CRC_14443_A, sak_10, 1, &sak_10[1], &sak_10[2]); + + // save CUID + ar_nr_responses[0] = cuid = bytes_to_num(rUIDBCC3, 4); + rUIDBCC1[0] = 0x88; // CascadeTag, CT + // BCC + rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; + + rUIDBCC2[0] = 0x88; // CascadeTag, CT + // BCC + rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; + rUIDBCC3[4] = rUIDBCC3[0] ^ rUIDBCC3[1] ^ rUIDBCC3[2] ^ rUIDBCC3[3]; + if (MF_DBGLEVEL >= 1) { + Dbprintf("10B UID: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x", + //rUIDBCC1[0], + rUIDBCC1[1], + rUIDBCC1[2], + rUIDBCC1[3], + //rUIDBCC2[0], + rUIDBCC2[1], + rUIDBCC2[2], + rUIDBCC2[3], + rUIDBCC3[0], + rUIDBCC3[1], + rUIDBCC3[2], + rUIDBCC3[3] + ); + } + break; + default: + break; } // We need to listen to the high-frequency, peak-detected path. @@ -2617,12 +2524,9 @@ 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); - bool finished = FALSE; while (!BUTTON_PRESS() && !finished && !usb_poll_validate_length()) { WDT_HIT(); @@ -2635,7 +2539,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * LED_A_ON(); } } - if(cardSTATE == MFEMUL_NOFIELD) continue; + if (cardSTATE == MFEMUL_NOFIELD) continue; //Now, get data res = EmGetCmd(receivedCmd, &len, receivedCmd_par); @@ -2648,16 +2552,13 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } // REQ or WUP request in ANY state and WUP in HALTED state - if (len == 1 && ((receivedCmd[0] == 0x26 && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == 0x52)) { + if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) { selTimer = GetTickCount(); - EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52)); + EmSendCmdEx(atqa, sizeof(atqa), (receivedCmd[0] == ISO14443A_CMD_WUPA)); cardSTATE = MFEMUL_SELECT1; - - // init crypto block - LED_B_OFF(); - LED_C_OFF(); crypto1_destroy(pcs); cardAUTHKEY = 0xff; + LEDsoff(); continue; } @@ -2669,30 +2570,88 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * break; } case MFEMUL_SELECT1:{ - // select all - if (len == 2 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x20)) { + if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) { if (MF_DBGLEVEL >= 4) Dbprintf("SELECT ALL received"); EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1)); break; } - - if (MF_DBGLEVEL >= 4 && len == 9 && receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 ) - { - Dbprintf("SELECT %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]); - } // select card if (len == 9 && - (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) { - EmSendCmd(_7BUID?rSAK1:rSAK, _7BUID?sizeof(rSAK1):sizeof(rSAK)); - cuid = bytes_to_num(rUIDBCC1, 4); - if (!_7BUID) { - cardSTATE = MFEMUL_WORK; - LED_B_ON(); - if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer); - break; - } else { - cardSTATE = MFEMUL_SELECT2; + ( receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && + receivedCmd[1] == 0x70 && + memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) { + + // SAK 4b + EmSendCmd(sak_4, sizeof(sak_4)); + switch(_UID_LEN){ + case 4: + cardSTATE = MFEMUL_WORK; + LED_B_ON(); + if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer); + continue; + case 7: + case 10: + cardSTATE = MFEMUL_SELECT2; + continue; + default:break; + } + } else { + cardSTATE_TO_IDLE(); + } + break; + } + case MFEMUL_SELECT2:{ + if (!len) { + LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); + break; + } + if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) { + EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2)); + break; + } + if (len == 9 && + (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && + receivedCmd[1] == 0x70 && + memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0) ) { + + EmSendCmd(sak_7, sizeof(sak_7)); + switch(_UID_LEN){ + case 7: + cardSTATE = MFEMUL_WORK; + LED_B_ON(); + if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer); + continue; + case 10: + cardSTATE = MFEMUL_SELECT3; + continue; + default:break; } + } else { + cardSTATE_TO_IDLE(); + } + break; + } + case MFEMUL_SELECT3:{ + if (!len) { + LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); + break; + } + if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 && receivedCmd[1] == 0x20)) { + EmSendCmd(rUIDBCC3, sizeof(rUIDBCC3)); + break; + } + if (len == 9 && + (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 && + receivedCmd[1] == 0x70 && + memcmp(&receivedCmd[2], rUIDBCC3, 4) == 0) ) { + + EmSendCmd(sak_10, sizeof(sak_10)); + cardSTATE = MFEMUL_WORK; + LED_B_ON(); + if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol3 time: %d", GetTickCount() - selTimer); + break; + } else { + cardSTATE_TO_IDLE(); } break; } @@ -2719,36 +2678,33 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * ar_nr_collected++; } // Interactive mode flag, means we need to send ACK - if(flags & FLAG_INTERACTIVE && ar_nr_collected == 2) - finished = true; + finished = (flags & FLAG_INTERACTIVE && ar_nr_collected == 2); } - - // --- crypto - //crypto1_word(pcs, ar , 1); - //cardRr = nr ^ crypto1_word(pcs, 0, 0); - - //test if auth OK - //if (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; - //} - + 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; + } + */ + ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0); - num_to_bytes(ans, 4, rAUTH_AT); - // --- crypto EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT)); LED_C_ON(); - cardSTATE = MFEMUL_WORK; + if (MF_DBGLEVEL >= 4) { Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", cardAUTHSC, @@ -2756,73 +2712,44 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * GetTickCount() - authTimer ); } - break; - } - case MFEMUL_SELECT2:{ - if (!len) { - LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); - break; - } - if (len == 2 && (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x20)) { - EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2)); - break; - } - - // select 2 card - if (len == 9 && - (receivedCmd[0] == 0x95 && - receivedCmd[1] == 0x70 && - memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0) ) { - EmSendCmd(rSAK, sizeof(rSAK)); - cuid = bytes_to_num(rUIDBCC2, 4); - cardSTATE = MFEMUL_WORK; - LED_B_ON(); - if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer); - break; - } - - // i guess there is a command). go into the work state. - if (len != 4) { - LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); - break; - } cardSTATE = MFEMUL_WORK; - //goto lbWORK; - //intentional fall-through to the next case-stmt + break; } - case MFEMUL_WORK:{ if (len == 0) { LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE); break; - } - + } bool encrypted_data = (cardAUTHKEY != 0xFF) ; - // decrypt seqence if(encrypted_data) mf_crypto1_decrypt(pcs, receivedCmd, len); - if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) { + if (len == 4 && (receivedCmd[0] == MIFARE_AUTH_KEYA || + receivedCmd[0] == MIFARE_AUTH_KEYB) ) { + authTimer = GetTickCount(); cardAUTHSC = receivedCmd[1] / 4; // received block num - cardAUTHKEY = receivedCmd[0] - 0x60; - crypto1_destroy(pcs);//Added by martin + cardAUTHKEY = receivedCmd[0] - 0x60; // & 1 + crypto1_destroy(pcs); crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY)); - if (!encrypted_data) { // first authentication - if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY ); - + if (!encrypted_data) { + // first authentication crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce - } else { // nested authentication - if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY ); + + if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY ); + + } else { + // nested authentication ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); num_to_bytes(ans, 4, rAUTH_AT); + + if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY ); } 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; break; } @@ -2845,12 +2772,13 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * break; } - if(receivedCmd[0] == 0x30 // read block - || receivedCmd[0] == 0xA0 // write block - || receivedCmd[0] == 0xC0 // inc - || receivedCmd[0] == 0xC1 // dec - || receivedCmd[0] == 0xC2 // restore - || receivedCmd[0] == 0xB0) { // transfer + if ( receivedCmd[0] == ISO14443A_CMD_READBLOCK || + receivedCmd[0] == ISO14443A_CMD_WRITEBLOCK || + receivedCmd[0] == MIFARE_CMD_INC || + receivedCmd[0] == MIFARE_CMD_DEC || + receivedCmd[0] == MIFARE_CMD_RESTORE || + receivedCmd[0] == MIFARE_CMD_TRANSFER ) { + if (receivedCmd[1] >= 16 * 4) { EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); 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]); @@ -2864,8 +2792,8 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } } // read block - if (receivedCmd[0] == 0x30) { - if (MF_DBGLEVEL >= 4) Dbprintf("Reader reading block %d (0x%02x)",receivedCmd[1],receivedCmd[1]); + if (receivedCmd[0] == ISO14443A_CMD_READBLOCK) { + if (MF_DBGLEVEL >= 4) Dbprintf("Reader reading block %d (0x%02x)", receivedCmd[1], receivedCmd[1]); emlGetMem(response, receivedCmd[1], 1); AppendCrc14443a(response, 16); @@ -2879,34 +2807,35 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * break; } // write block - if (receivedCmd[0] == 0xA0) { - if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)",receivedCmd[1],receivedCmd[1]); + if (receivedCmd[0] == ISO14443A_CMD_WRITEBLOCK) { + if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)", receivedCmd[1], receivedCmd[1]); EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK)); cardSTATE = MFEMUL_WRITEBL2; cardWRBL = receivedCmd[1]; break; } // increment, decrement, restore - 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 ( receivedCmd[0] == MIFARE_CMD_INC || + receivedCmd[0] == MIFARE_CMD_DEC || + receivedCmd[0] == MIFARE_CMD_RESTORE) { + + 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 >= 4) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking"); EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); break; } EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK)); - if (receivedCmd[0] == 0xC1) - cardSTATE = MFEMUL_INTREG_INC; - if (receivedCmd[0] == 0xC0) - cardSTATE = MFEMUL_INTREG_DEC; - if (receivedCmd[0] == 0xC2) - cardSTATE = MFEMUL_INTREG_REST; + if (receivedCmd[0] == MIFARE_CMD_INC) cardSTATE = MFEMUL_INTREG_INC; + if (receivedCmd[0] == MIFARE_CMD_DEC) cardSTATE = MFEMUL_INTREG_DEC; + if (receivedCmd[0] == MIFARE_CMD_RESTORE) cardSTATE = MFEMUL_INTREG_REST; cardWRBL = receivedCmd[1]; break; } // transfer - if (receivedCmd[0] == 0xB0) { - if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]); + if (receivedCmd[0] == MIFARE_CMD_TRANSFER) { + if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)", receivedCmd[0], receivedCmd[1], receivedCmd[1]); if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd[1])) EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); else @@ -2914,7 +2843,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * break; } // halt - if (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00) { + if (receivedCmd[0] == ISO14443A_CMD_HALT && receivedCmd[1] == 0x00) { LED_B_OFF(); LED_C_OFF(); cardSTATE = MFEMUL_HALTED; @@ -2923,7 +2852,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * break; } // RATS - if (receivedCmd[0] == 0xe0) {//RATS + if (receivedCmd[0] == ISO14443A_CMD_RATS) { EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); break; } @@ -2944,7 +2873,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } break; } - case MFEMUL_INTREG_INC:{ mf_crypto1_decrypt(pcs, receivedCmd, len); memcpy(&ans, receivedCmd, 4); @@ -2986,9 +2914,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * } } - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LEDsoff(); - // Interactive mode flag, means we need to send ACK if(flags & FLAG_INTERACTIVE) { //May just aswell send the collected ar_nr in the response aswell @@ -2999,40 +2924,30 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * 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 %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 - ); + Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x", + ar_nr_responses[0], // CUID + ar_nr_responses[1], // NT + ar_nr_responses[2], // AR1 + ar_nr_responses[3], // NR1 + ar_nr_responses[4], // AR2 + ar_nr_responses[5] // NR2 + ); } else { Dbprintf("Failed to obtain two AR/NR pairs!"); if(ar_nr_collected > 0 ) { - Dbprintf("Only got these: UID=%06x%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 - ); + Dbprintf("Only got these: UID=%08x, nonce=%08x, AR1=%08x, NR1=%08x", + ar_nr_responses[0], // CUID + ar_nr_responses[1], // NT + ar_nr_responses[2], // AR1 + ar_nr_responses[3] // 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()); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LEDsoff(); set_tracing(FALSE); } @@ -3040,6 +2955,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t * //----------------------------------------------------------------------------- // MIFARE sniffer. // +// if no activity for 2sec, it sends the collected data to the client. //----------------------------------------------------------------------------- void RAMFUNC SniffMifare(uint8_t param) { // param: @@ -3047,13 +2963,12 @@ void RAMFUNC SniffMifare(uint8_t param) { // bit 1 - trigger from first reader 7-bit request LEDsoff(); - // init trace buffer + // free eventually allocated BigBuf memory + BigBuf_free(); BigBuf_Clear_ext(false); clear_trace(); set_tracing(TRUE); // The command (reader -> tag) that we're receiving. - // The length of a received command will in most cases be no more than 18 bytes. - // So 32 should be enough! uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00}; uint8_t receivedCmdPar[MAX_MIFARE_PARITY_SIZE] = {0x00}; @@ -3063,10 +2978,8 @@ void RAMFUNC SniffMifare(uint8_t param) { iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER); - // free eventually allocated BigBuf memory - BigBuf_free(); - // allocate the DMA buffer, used to stream samples from the FPGA + // [iceman] is this sniffed data unsigned? uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); uint8_t *data = dmaBuf; uint8_t previous_data = 0; @@ -3081,25 +2994,24 @@ void RAMFUNC SniffMifare(uint8_t param) { // Set up the demodulator for the reader -> tag commands UartInit(receivedCmd, receivedCmdPar); - // Setup for the DMA. - FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); // set transfer address and number of bytes. Start transfer. + // set transfer address and number of bytes. Start transfer. + FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); LED_D_OFF(); - - // init sniffer + MfSniffInit(); // And now we loop, receiving samples. - for(uint32_t sniffCounter = 0; TRUE; ) { + for(uint32_t sniffCounter = 0;; ) { + + LED_A_ON(); + WDT_HIT(); if(BUTTON_PRESS()) { DbpString("cancelled by button"); break; } - - LED_A_ON(); - WDT_HIT(); - + if ((sniffCounter & 0x0000FFFF) == 0) { // from time to time // check if a transaction is completed (timeout after 2000ms). // if yes, stop the DMA transfer and send what we have so far to the client @@ -3136,7 +3048,7 @@ void RAMFUNC SniffMifare(uint8_t param) { if (!AT91C_BASE_PDC_SSC->PDC_RCR) { AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) dmaBuf; AT91C_BASE_PDC_SSC->PDC_RCR = DMA_BUFFER_SIZE; - Dbprintf("RxEmpty ERROR!!! data length:%d", dataLen); // temporary + Dbprintf("RxEmpty ERROR, data length:%d", dataLen); // temporary } // secondary buffer sets as primary, secondary buffer was stopped if (!AT91C_BASE_PDC_SSC->PDC_RNCR) { @@ -3156,10 +3068,7 @@ 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); - - /* And also reset the demod code */ DemodReset(); } ReaderIsActive = (Uart.state != STATE_UNSYNCD); @@ -3173,10 +3082,7 @@ void RAMFUNC SniffMifare(uint8_t param) { if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, FALSE)) break; - // 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); @@ -3194,7 +3100,8 @@ void RAMFUNC SniffMifare(uint8_t param) { FpgaDisableSscDma(); MfSniffEnd(); + if (MF_DBGLEVEL >= 1) Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LEDsoff(); - Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len); set_tracing(FALSE); }