X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7e758047e4acf6f8db0178564691d20af38986ab..713e7ffbc791bc34250e145b88db44786f22e81e:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index e228b7fd..6c219f30 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -1,5 +1,7 @@ //----------------------------------------------------------------------------- +// Merlok - June 2011 // Gerhard de Koning Gans - May 2008 +// Hagen Fritsch - June 2010 // // This code is licensed to you under the terms of the GNU GPL, version 2 or, // at your option, any later version. See the LICENSE.txt file for the text of @@ -14,17 +16,21 @@ #include "string.h" #include "iso14443crc.h" +#include "iso14443a.h" +#include "crapto1.h" +#include "mifareutil.h" static uint8_t *trace = (uint8_t *) BigBuf; static int traceLen = 0; static int rsamples = 0; static int tracing = TRUE; +static uint32_t iso14a_timeout; -// CARD TO READER +// CARD TO READER - manchester // Sequence D: 11110000 modulation with subcarrier during first half // Sequence E: 00001111 modulation with subcarrier during second half // Sequence F: 00000000 no modulation with subcarrier -// READER TO CARD +// READER TO CARD - miller // Sequence X: 00001100 drop after half a period // Sequence Y: 00000000 no drop // Sequence Z: 11000000 drop at start @@ -54,17 +60,27 @@ static const uint8_t OddByteParity[256] = { 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1 }; -// BIG CHANGE - UNDERSTAND THIS BEFORE WE COMMIT -#define RECV_CMD_OFFSET 3032 -#define RECV_RES_OFFSET 3096 -#define DMA_BUFFER_OFFSET 3160 -#define DMA_BUFFER_SIZE 4096 -#define TRACE_LENGTH 3000 +uint8_t trigger = 0; +void iso14a_set_trigger(int enable) { + trigger = enable; +} + +void iso14a_clear_tracelen(void) { + traceLen = 0; +} +void iso14a_set_tracing(int enable) { + tracing = enable; +} //----------------------------------------------------------------------------- // Generate the parity value for a byte sequence // //----------------------------------------------------------------------------- +byte_t oddparity (const byte_t bt) +{ + return OddByteParity[bt]; +} + uint32_t GetParity(const uint8_t * pbtCmd, int iLen) { int i; @@ -78,7 +94,7 @@ uint32_t GetParity(const uint8_t * pbtCmd, int iLen) return dwPar; } -static 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); } @@ -138,7 +154,7 @@ static struct { uint8_t *output; } Uart; -static int MillerDecoding(int bit) +static RAMFUNC int MillerDecoding(int bit) { int error = 0; int bitright; @@ -340,7 +356,7 @@ static int MillerDecoding(int bit) if(!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } else if(bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } if(!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; - if(Uart.syncBit & (Uart.bitBuffer & 8)) { + if(Uart.syncBit && (Uart.bitBuffer & 8)) { Uart.syncBit = 8; // the first half bit period is expected in next sample @@ -402,7 +418,7 @@ static struct { uint8_t *output; } Demod; -static int ManchesterDecoding(int v) +static RAMFUNC int ManchesterDecoding(int v) { int bit; int modulation; @@ -423,28 +439,29 @@ static int ManchesterDecoding(int v) Demod.syncBit = 0; //Demod.samples = 0; Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part - if(bit & 0x08) { Demod.syncBit = 0x08; } - if(!Demod.syncBit) { - if(bit & 0x04) { Demod.syncBit = 0x04; } - } - else if(bit & 0x04) { Demod.syncBit = 0x04; bit <<= 4; } - if(!Demod.syncBit) { - if(bit & 0x02) { Demod.syncBit = 0x02; } + + if(bit & 0x08) { + Demod.syncBit = 0x08; } - else if(bit & 0x02) { Demod.syncBit = 0x02; bit <<= 4; } - if(!Demod.syncBit) { - if(bit & 0x01) { Demod.syncBit = 0x01; } - if(Demod.syncBit & (Demod.buffer & 0x08)) { - Demod.syncBit = 0x08; + if(bit & 0x04) { + if(Demod.syncBit) { + bit <<= 4; + } + Demod.syncBit = 0x04; + } - // The first half bitperiod is expected in next sample - Demod.posCount = 0; - Demod.output[Demod.len] = 0xfb; + if(bit & 0x02) { + if(Demod.syncBit) { + bit <<= 2; } + Demod.syncBit = 0x02; } - else if(bit & 0x01) { Demod.syncBit = 0x01; } + if(bit & 0x01 && Demod.syncBit) { + Demod.syncBit = 0x01; + } + if(Demod.syncBit) { Demod.len = 0; Demod.state = DEMOD_START_OF_COMMUNICATION; @@ -454,6 +471,7 @@ static int ManchesterDecoding(int v) Demod.parityBits = 0; Demod.samples = 0; if(Demod.posCount) { + if(trigger) LED_A_OFF(); switch(Demod.syncBit) { case 0x08: Demod.samples = 3; break; case 0x04: Demod.samples = 2; break; @@ -598,7 +616,7 @@ static int ManchesterDecoding(int v) // triggering so that we start recording at the point that the tag is moved // near the reader. //----------------------------------------------------------------------------- -void SnoopIso14443a(void) +void RAMFUNC SnoopIso14443a(void) { // #define RECV_CMD_OFFSET 2032 // original (working as of 21/2/09) values // #define RECV_RES_OFFSET 2096 // original (working as of 21/2/09) values @@ -621,7 +639,8 @@ void SnoopIso14443a(void) // As we receive stuff, we copy it from receivedCmd or receivedResponse // into trace, along with its length and other annotations. //uint8_t *trace = (uint8_t *)BigBuf; - //int traceLen = 0; + + traceLen = 0; // uncommented to fix ISSUE 15 - gerhard - jan2011 // The DMA buffer, used to stream samples from the FPGA int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET; @@ -633,7 +652,7 @@ void SnoopIso14443a(void) // Count of samples received so far, so that we can include timing // information in the trace buffer. int samples = 0; - int rsamples = 0; + int rsamples = 0; memset(trace, 0x44, RECV_CMD_OFFSET); @@ -765,12 +784,11 @@ done: //----------------------------------------------------------------------------- // Prepare tag messages //----------------------------------------------------------------------------- -static void CodeIso14443aAsTag(const uint8_t *cmd, int len) +static void CodeIso14443aAsTagPar(const uint8_t *cmd, int len, uint32_t dwParity) { - int i; - int oddparity; + int i; - ToSendReset(); + ToSendReset(); // Correction bit, might be removed when not needed ToSendStuffBit(0); @@ -781,55 +799,47 @@ static void CodeIso14443aAsTag(const uint8_t *cmd, int len) ToSendStuffBit(0); ToSendStuffBit(0); ToSendStuffBit(0); - + // Send startbit ToSend[++ToSendMax] = SEC_D; - for(i = 0; i < len; i++) { - int j; - uint8_t b = cmd[i]; + for(i = 0; i < len; i++) { + int j; + uint8_t b = cmd[i]; // Data bits - oddparity = 0x01; for(j = 0; j < 8; j++) { - oddparity ^= (b & 1); if(b & 1) { ToSend[++ToSendMax] = SEC_D; } else { ToSend[++ToSendMax] = SEC_E; - } - b >>= 1; - } + } + b >>= 1; + } - // Parity bit - if(oddparity) { - ToSend[++ToSendMax] = SEC_D; + // Get the parity bit + if ((dwParity >> i) & 0x01) { + ToSend[++ToSendMax] = SEC_D; } else { ToSend[++ToSendMax] = SEC_E; } - } - - // Send stopbit - ToSend[++ToSendMax] = SEC_F; - - // Flush the buffer in FPGA!! - for(i = 0; i < 5; i++) { - ToSend[++ToSendMax] = SEC_F; } - // Convert from last byte pos to length - ToSendMax++; + // Send stopbit + ToSend[++ToSendMax] = SEC_F; - // Add a few more for slop - ToSend[ToSendMax++] = 0x00; - ToSend[ToSendMax++] = 0x00; - //ToSendMax += 2; + // Convert from last byte pos to length + ToSendMax++; +} + +static void CodeIso14443aAsTag(const uint8_t *cmd, int len){ + CodeIso14443aAsTagPar(cmd, len, GetParity(cmd, len)); } //----------------------------------------------------------------------------- // This is to send a NACK kind of answer, its only 3 bits, I know it should be 4 //----------------------------------------------------------------------------- -static void CodeStrangeAnswer() +static void CodeStrangeAnswerAsTag() { int i; @@ -867,11 +877,47 @@ static void CodeStrangeAnswer() // Convert from last byte pos to length ToSendMax++; +} + +static void Code4bitAnswerAsTag(uint8_t cmd) +{ + int i; + + ToSendReset(); - // Add a few more for slop - ToSend[ToSendMax++] = 0x00; - ToSend[ToSendMax++] = 0x00; - //ToSendMax += 2; + // Correction bit, might be removed when not needed + ToSendStuffBit(0); + ToSendStuffBit(0); + ToSendStuffBit(0); + ToSendStuffBit(0); + ToSendStuffBit(1); // 1 + ToSendStuffBit(0); + ToSendStuffBit(0); + ToSendStuffBit(0); + + // Send startbit + ToSend[++ToSendMax] = SEC_D; + + uint8_t b = cmd; + for(i = 0; i < 4; i++) { + if(b & 1) { + ToSend[++ToSendMax] = SEC_D; + } else { + ToSend[++ToSendMax] = SEC_E; + } + b >>= 1; + } + + // Send stopbit + ToSend[++ToSendMax] = SEC_F; + + // Flush the buffer in FPGA!! + for(i = 0; i < 5; i++) { + ToSend[++ToSendMax] = SEC_F; + } + + // Convert from last byte pos to length + ToSendMax++; } //----------------------------------------------------------------------------- @@ -913,6 +959,7 @@ static int GetIso14443aCommandFromReader(uint8_t *received, int *len, int maxLen } } } +static int EmSendCmd14443aRaw(uint8_t *resp, int respLen, int correctionNeeded); //----------------------------------------------------------------------------- // Main loop of simulated tag: receive commands from reader, decide what @@ -1043,7 +1090,7 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); memcpy(resp3a, ToSend, ToSendMax); resp3aLen = ToSendMax; // Strange answer is an example of rare message size (3 bits) - CodeStrangeAnswer(); + CodeStrangeAnswerAsTag(); memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax; // Authentication answer (random nonce) @@ -1129,10 +1176,11 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); receivedCmd[0], receivedCmd[1], receivedCmd[2]); } else { // Never seen this command before - Dbprintf("Unknown command received from reader: %x %x %x %x %x %x %x %x %x", + Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x", + len, receivedCmd[0], receivedCmd[1], receivedCmd[2], - receivedCmd[3], receivedCmd[3], receivedCmd[4], - receivedCmd[5], receivedCmd[6], receivedCmd[7]); + receivedCmd[3], receivedCmd[4], receivedCmd[5], + receivedCmd[6], receivedCmd[7], receivedCmd[8]); // Do not respond resp = resp1; respLen = 0; order = 0; } @@ -1160,8 +1208,13 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); } if(respLen <= 0) continue; + //---------------------------- + u = 0; + b = 0x00; + fdt_indicator = FALSE; - // Modulate Manchester + EmSendCmd14443aRaw(resp, respLen, receivedCmd[0] == 0x52); +/* // Modulate Manchester FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD); AT91C_BASE_SSC->SSC_THR = 0x00; FpgaSetupSsc(); @@ -1193,7 +1246,7 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); break; } } - +*/ } Dbprintf("%x %x %x", happened, happened2, cmdsRecvd); @@ -1378,6 +1431,156 @@ void CodeIso14443aAsReaderPar(const uint8_t * cmd, int len, uint32_t dwParity) ToSendMax++; } +//----------------------------------------------------------------------------- +// 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, int *len, int maxLen) +{ + *len = 0; + + uint32_t timer = 0, vtime = 0; + int analogCnt = 0; + int analogAVG = 0; + + // 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); + + // Set ADC to read field strength + AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST; + AT91C_BASE_ADC->ADC_MR = + ADC_MODE_PRESCALE(32) | + ADC_MODE_STARTUP_TIME(16) | + ADC_MODE_SAMPLE_HOLD_TIME(8); + AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF); + // start ADC + AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; + + // Now run a 'software UART' on the stream of incoming samples. + Uart.output = received; + Uart.byteCntMax = maxLen; + Uart.state = STATE_UNSYNCD; + + for(;;) { + WDT_HIT(); + + if (BUTTON_PRESS()) return 1; + + // test if the field exists + if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF)) { + analogCnt++; + analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF]; + AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; + if (analogCnt >= 32) { + if ((33000 * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) { + vtime = GetTickCount(); + if (!timer) timer = vtime; + // 50ms no field --> card to idle state + if (vtime - timer > 50) return 2; + } else + if (timer) timer = 0; + analogCnt = 0; + analogAVG = 0; + } + } + // transmit none + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; + } + // receive and test the miller decoding + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + if(MillerDecoding((b & 0xf0) >> 4)) { + *len = Uart.byteCnt; + if (tracing) LogTrace(received, *len, GetDeltaCountUS(), Uart.parityBits, TRUE); + return 0; + } + if(MillerDecoding(b & 0x0f)) { + *len = Uart.byteCnt; + if (tracing) LogTrace(received, *len, GetDeltaCountUS(), Uart.parityBits, TRUE); + return 0; + } + } + } +} + +static int EmSendCmd14443aRaw(uint8_t *resp, int respLen, int correctionNeeded) +{ + int i, u = 0; + uint8_t b = 0; + + // Modulate Manchester + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD); + AT91C_BASE_SSC->SSC_THR = 0x00; + FpgaSetupSsc(); + + // include correction bit + i = 1; + if((Uart.parityBits & 0x01) || correctionNeeded) { + // 1236, so correction bit needed + i = 0; + } + + // send cycle + for(;;) { + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + (void)b; + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + if(i > respLen) { + b = 0xff; // was 0x00 + u++; + } else { + b = resp[i]; + i++; + } + AT91C_BASE_SSC->SSC_THR = b; + + if(u > 4) break; + } + if(BUTTON_PRESS()) { + break; + } + } + + return 0; +} + +int EmSend4bitEx(uint8_t resp, int correctionNeeded){ + Code4bitAnswerAsTag(resp); + int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded); + if (tracing) LogTrace(&resp, 1, GetDeltaCountUS(), GetParity(&resp, 1), FALSE); + return res; +} + +int EmSend4bit(uint8_t resp){ + return EmSend4bitEx(resp, 0); +} + +int EmSendCmdExPar(uint8_t *resp, int respLen, int correctionNeeded, uint32_t par){ + CodeIso14443aAsTagPar(resp, respLen, par); + int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded); + if (tracing) LogTrace(resp, respLen, GetDeltaCountUS(), par, FALSE); + return res; +} + +int EmSendCmdEx(uint8_t *resp, int respLen, int correctionNeeded){ + return EmSendCmdExPar(resp, respLen, correctionNeeded, GetParity(resp, respLen)); +} + +int EmSendCmd(uint8_t *resp, int respLen){ + return EmSendCmdExPar(resp, respLen, 0, GetParity(resp, respLen)); +} + +int EmSendCmdPar(uint8_t *resp, int respLen, uint32_t par){ + return EmSendCmdExPar(resp, respLen, 0, par); +} + //----------------------------------------------------------------------------- // Wait a certain time for tag response // If a response is captured return TRUE @@ -1389,30 +1592,30 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, int maxLen, int int c; // Set FPGA mode to "reader listen mode", no modulation (listen - // only, since we are receiving, not transmitting). - // Signal field is on with the appropriate LED - LED_D_ON(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); + // only, since we are receiving, not transmitting). + // Signal field is on with the appropriate LED + LED_D_ON(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); - // Now get the answer from the card - Demod.output = receivedResponse; - Demod.len = 0; - Demod.state = DEMOD_UNSYNCD; + // Now get the answer from the card + Demod.output = receivedResponse; + Demod.len = 0; + Demod.state = DEMOD_UNSYNCD; uint8_t b; if (elapsed) *elapsed = 0; c = 0; for(;;) { - WDT_HIT(); + WDT_HIT(); - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! if (elapsed) (*elapsed)++; - } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - if(c < 2048) { c++; } else { return FALSE; } - b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + if(c < iso14a_timeout) { c++; } else { return FALSE; } + b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; if(ManchesterDecoding((b>>4) & 0xf)) { *samples = ((c - 1) << 3) + 4; return TRUE; @@ -1421,8 +1624,8 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, int maxLen, int *samples = c << 3; return TRUE; } - } - } + } + } } void ReaderTransmitShort(const uint8_t* bt) @@ -1450,6 +1653,8 @@ void ReaderTransmitPar(uint8_t* frame, int len, uint32_t par) // Select the card TransmitFor14443a(ToSend, ToSendMax, &samples, &wait); + if(trigger) + LED_A_ON(); // Store reader command in buffer if (tracing) LogTrace(frame,len,0,par,TRUE); @@ -1465,69 +1670,98 @@ void ReaderTransmit(uint8_t* frame, int len) int ReaderReceive(uint8_t* receivedAnswer) { int samples = 0; - if (!GetIso14443aAnswerFromTag(receivedAnswer,100,&samples,0)) return FALSE; + if (!GetIso14443aAnswerFromTag(receivedAnswer,160,&samples,0)) return FALSE; if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE); if(samples == 0) return FALSE; return Demod.len; } +int ReaderReceivePar(uint8_t* receivedAnswer, uint32_t * parptr) +{ + int samples = 0; + if (!GetIso14443aAnswerFromTag(receivedAnswer,160,&samples,0)) return FALSE; + if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE); + *parptr = Demod.parityBits; + if(samples == 0) return FALSE; + return Demod.len; +} + /* performs iso14443a anticolision procedure - * fills the uid pointer */ -int iso14443a_select_card(uint8_t * uid_ptr) { - uint8_t wupa[] = { 0x52 }; + * fills the uid pointer unless NULL + * fills resp_data unless NULL */ +int iso14443a_select_card(uint8_t * uid_ptr, iso14a_card_select_t * resp_data, uint32_t * cuid_ptr) { + uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP uint8_t sel_all[] = { 0x93,0x20 }; uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; - uint8_t sel_all_c2[] = { 0x95,0x20 }; - uint8_t sel_uid_c2[] = { 0x95,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0 uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes - uint8_t* uid = resp + 7; + + uint8_t sak = 0x04; // cascade uid + int cascade_level = 0; int len; + + // clear uid + memset(uid_ptr, 0, 8); // Broadcast for a card, WUPA (0x52) will force response from all cards in the field ReaderTransmitShort(wupa); // Receive the ATQA if(!ReaderReceive(resp)) return 0; - // if(*(uint16_t *) resp == 0x4403) MIFARE_CLASSIC - // if(*(uint16_t *) resp == 0x0400) MIFARE_DESFIRE - - ReaderTransmit(sel_all,sizeof(sel_all)); // SELECT_ALL - if(!ReaderReceive(uid)) return 0; - // Construct SELECT UID command - // First copy the 5 bytes (Mifare Classic) after the 93 70 - memcpy(sel_uid+2,uid,5); - // Secondly compute the two CRC bytes at the end - AppendCrc14443a(sel_uid,7); - - ReaderTransmit(sel_uid,sizeof(sel_uid)); - // Receive the SAK - if (!ReaderReceive(resp)) return 0; - - // OK we have selected at least at cascade 1, lets see if first byte of UID was 0x88 in + if(resp_data) + memcpy(resp_data->atqa, resp, 2); + + // 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 - // When the UID is not complete, the 3nd bit (from the right) is set in the SAK. - if (resp[0] &= 0x04) + // While the UID is not complete, the 3nd bit (from the right) is set in the SAK. + for(; sak & 0x04; cascade_level++) { - ReaderTransmit(sel_all_c2,sizeof(sel_all_c2)); - if (!ReaderReceive(uid+5)) return 0; + // SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97) + sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2; + + // SELECT_ALL + ReaderTransmit(sel_all,sizeof(sel_all)); + if (!ReaderReceive(resp)) return 0; + if(uid_ptr) memcpy(uid_ptr + cascade_level*4, resp, 4); + + // calculate crypto UID + if(cuid_ptr) *cuid_ptr = bytes_to_num(resp, 4); // Construct SELECT UID command - memcpy(sel_uid_c2+2,uid+5,5); - AppendCrc14443a(sel_uid_c2,7); - ReaderTransmit(sel_uid_c2,sizeof(sel_uid_c2)); + memcpy(sel_uid+2,resp,5); + AppendCrc14443a(sel_uid,7); + ReaderTransmit(sel_uid,sizeof(sel_uid)); + // Receive the SAK if (!ReaderReceive(resp)) return 0; + sak = resp[0]; } - if(uid_ptr) memcpy(uid_ptr, uid, 10); - if( (resp[0] & 0x20) == 0) + if(resp_data) { + resp_data->sak = sak; + resp_data->ats_len = 0; + } + //-- this byte not UID, it CT. http://www.nxp.com/documents/application_note/AN10927.pdf page 3 + if (uid_ptr[0] == 0x88) { + memcpy(uid_ptr, uid_ptr + 1, 7); + uid_ptr[7] = 0; + } + + if( (sak & 0x20) == 0) return 2; // non iso14443a compliant tag + // Request for answer to select - AppendCrc14443a(rats, 2); - ReaderTransmit(rats, sizeof(rats)); - if (!(len = ReaderReceive(resp))) return 0; + if(resp_data) { // JCOP cards - if reader sent RATS then there is no MIFARE session at all!!! + AppendCrc14443a(rats, 2); + ReaderTransmit(rats, sizeof(rats)); + + if (!(len = ReaderReceive(resp))) return 0; + + memcpy(resp_data->ats, resp, sizeof(resp_data->ats)); + resp_data->ats_len = len; + } + return 1; } @@ -1547,21 +1781,88 @@ void iso14443a_setup() { LED_D_ON(); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); SpinDelay(200); + + iso14a_timeout = 2048; //default +} + +int iso14_apdu(uint8_t * cmd, size_t cmd_len, void * data) { + uint8_t real_cmd[cmd_len+4]; + real_cmd[0] = 0x0a; //I-Block + real_cmd[1] = 0x00; //CID: 0 //FIXME: allow multiple selected cards + memcpy(real_cmd+2, cmd, cmd_len); + AppendCrc14443a(real_cmd,cmd_len+2); + + ReaderTransmit(real_cmd, cmd_len+4); + size_t len = ReaderReceive(data); + if(!len) + return -1; //DATA LINK ERROR + + return len; } + //----------------------------------------------------------------------------- // Read an ISO 14443a tag. Send out commands and store answers. // //----------------------------------------------------------------------------- -void ReaderIso14443a(uint32_t parameter) +void ReaderIso14443a(UsbCommand * c, UsbCommand * ack) { + iso14a_command_t param = c->arg[0]; + uint8_t * cmd = c->d.asBytes; + size_t len = c->arg[1]; + + if(param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(1); + + if(param & ISO14A_CONNECT) { + iso14443a_setup(); + ack->arg[0] = iso14443a_select_card(ack->d.asBytes, (iso14a_card_select_t *) (ack->d.asBytes+12), NULL); + UsbSendPacket((void *)ack, sizeof(UsbCommand)); + } + + if(param & ISO14A_SET_TIMEOUT) { + iso14a_timeout = c->arg[2]; + } + if(param & ISO14A_SET_TIMEOUT) { + iso14a_timeout = c->arg[2]; + } + + if(param & ISO14A_APDU) { + ack->arg[0] = iso14_apdu(cmd, len, ack->d.asBytes); + UsbSendPacket((void *)ack, sizeof(UsbCommand)); + } + + if(param & ISO14A_RAW) { + if(param & ISO14A_APPEND_CRC) { + AppendCrc14443a(cmd,len); + len += 2; + } + ReaderTransmit(cmd,len); + ack->arg[0] = ReaderReceive(ack->d.asBytes); + UsbSendPacket((void *)ack, sizeof(UsbCommand)); + } + + if(param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(0); + + if(param & ISO14A_NO_DISCONNECT) + return; + + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LEDsoff(); +} +//----------------------------------------------------------------------------- +// Read an ISO 14443a tag. Send out commands and store answers. +// +//----------------------------------------------------------------------------- +void ReaderMifare(uint32_t parameter) +{ // Mifare AUTH uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; -// uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00 }; + uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; uint8_t* receivedAnswer = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes traceLen = 0; + tracing = false; iso14443a_setup(); @@ -1569,127 +1870,541 @@ void ReaderIso14443a(uint32_t parameter) LED_B_OFF(); LED_C_OFF(); - while(traceLen < TRACE_LENGTH) + byte_t nt_diff = 0; + LED_A_OFF(); + byte_t par = 0; + byte_t par_mask = 0xff; + byte_t par_low = 0; + int led_on = TRUE; + uint8_t uid[8]; + uint32_t cuid; + + tracing = FALSE; + byte_t nt[4] = {0,0,0,0}; + byte_t nt_attacked[4], nt_noattack[4]; + byte_t par_list[8] = {0,0,0,0,0,0,0,0}; + byte_t ks_list[8] = {0,0,0,0,0,0,0,0}; + num_to_bytes(parameter, 4, nt_noattack); + int isOK = 0, isNULL = 0; + + while(TRUE) { - // Test if the action was cancelled - if(BUTTON_PRESS()) break; + LED_C_ON(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + SpinDelay(200); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); + LED_C_OFF(); - if(!iso14443a_select_card(NULL)) { - DbpString("iso14443a setup failed"); + // Test if the action was cancelled + if(BUTTON_PRESS()) { break; } + if(!iso14443a_select_card(uid, NULL, &cuid)) continue; + // Transmit MIFARE_CLASSIC_AUTH - ReaderTransmit(mf_auth,sizeof(mf_auth)); + ReaderTransmit(mf_auth, sizeof(mf_auth)); // Receive the (16 bit) "random" nonce if (!ReaderReceive(receivedAnswer)) continue; + memcpy(nt, receivedAnswer, 4); + + // Transmit reader nonce and reader answer + ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar),par); + + // Receive 4 bit answer + if (ReaderReceive(receivedAnswer)) + { + if ( (parameter != 0) && (memcmp(nt, nt_noattack, 4) == 0) ) continue; + + isNULL = (nt_attacked[0] = 0) && (nt_attacked[1] = 0) && (nt_attacked[2] = 0) && (nt_attacked[3] = 0); + if ( (isNULL != 0 ) && (memcmp(nt, nt_attacked, 4) != 0) ) continue; + + if (nt_diff == 0) + { + LED_A_ON(); + memcpy(nt_attacked, nt, 4); + par_mask = 0xf8; + par_low = par & 0x07; + } + + led_on = !led_on; + if(led_on) LED_B_ON(); else LED_B_OFF(); + par_list[nt_diff] = par; + ks_list[nt_diff] = receivedAnswer[0] ^ 0x05; + + // Test if the information is complete + if (nt_diff == 0x07) { + isOK = 1; + break; + } + + nt_diff = (nt_diff + 1) & 0x07; + mf_nr_ar[3] = nt_diff << 5; + par = par_low; + } else { + if (nt_diff == 0) + { + par++; + } else { + par = (((par >> 3) + 1) << 3) | par_low; + } + } } + LogTrace(nt, 4, 0, GetParity(nt, 4), TRUE); + LogTrace(par_list, 8, 0, GetParity(par_list, 8), TRUE); + LogTrace(ks_list, 8, 0, GetParity(ks_list, 8), TRUE); + + UsbCommand ack = {CMD_ACK, {isOK, 0, 0}}; + memcpy(ack.d.asBytes + 0, uid, 4); + memcpy(ack.d.asBytes + 4, nt, 4); + memcpy(ack.d.asBytes + 8, par_list, 8); + memcpy(ack.d.asBytes + 16, ks_list, 8); + + LED_B_ON(); + UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); + LED_B_OFF(); + // Thats it... FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LEDsoff(); - Dbprintf("%x %x %x", rsamples, 0xCC, 0xCC); - DbpString("ready.."); + tracing = TRUE; + + if (MF_DBGLEVEL >= 1) DbpString("COMMAND mifare FINISHED"); } + //----------------------------------------------------------------------------- -// Read an ISO 14443a tag. Send out commands and store answers. -// +// MIFARE 1K simulate. +// //----------------------------------------------------------------------------- -void ReaderMifare(uint32_t parameter) +void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) { - // Mifare AUTH - uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; - uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; - - uint8_t* receivedAnswer = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes - traceLen = 0; - tracing = false; + int cardSTATE = MFEMUL_NOFIELD; + int _7BUID = 0; + int vHf = 0; // in mV + int nextCycleTimeout = 0; + int res; +// uint32_t timer = 0; + uint32_t selTimer = 0; + uint32_t authTimer = 0; + uint32_t par = 0; + int len = 0; + uint8_t cardWRBL = 0; + uint8_t cardAUTHSC = 0; + uint8_t cardAUTHKEY = 0xff; // no authentication + uint32_t cardRn = 0; + 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; + + uint8_t* receivedCmd = eml_get_bigbufptr_recbuf(); + uint8_t *response = eml_get_bigbufptr_sendbuf(); + + static uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID + + static uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; + static uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!! + + static uint8_t rSAK[] = {0x08, 0xb6, 0xdd}; + static uint8_t rSAK1[] = {0x04, 0xda, 0x17}; + + static uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04}; +// static uint8_t rAUTH_NT[] = {0x1a, 0xac, 0xff, 0x4f}; + static uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00}; + + // clear trace + traceLen = 0; + tracing = true; + + // Authenticate response - nonce + uint32_t nonce = bytes_to_num(rAUTH_NT, 4); + + // get UID from emul memory + emlGetMemBt(receivedCmd, 7, 1); + _7BUID = !(receivedCmd[0] == 0x00); + if (!_7BUID) { // ---------- 4BUID + rATQA[0] = 0x04; + + emlGetMemBt(rUIDBCC1, 0, 4); + rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; + } else { // ---------- 7BUID + rATQA[0] = 0x44; + + rUIDBCC1[0] = 0x88; + emlGetMemBt(&rUIDBCC1[1], 0, 3); + rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; + emlGetMemBt(rUIDBCC2, 3, 4); + rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; + } - iso14443a_setup(); +// -------------------------------------- test area - LED_A_ON(); - LED_B_OFF(); - LED_C_OFF(); +// -------------------------------------- END test area + // start mkseconds counter + StartCountUS(); - byte_t nt_diff = 0; - LED_A_OFF(); - byte_t par = 0; - byte_t par_mask = 0xff; - byte_t par_low = 0; - int led_on = TRUE; - - tracing = FALSE; - byte_t nt[4]; - byte_t nt_attacked[4]; - byte_t par_list[8]; - byte_t ks_list[8]; - num_to_bytes(parameter,4,nt_attacked); - - while(TRUE) - { - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - SpinDelay(200); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - - // Test if the action was cancelled - if(BUTTON_PRESS()) { - break; - } + // We need to listen to the high-frequency, peak-detected path. + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaSetupSsc(); - if(!iso14443a_select_card(NULL)) continue; + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); + SpinDelay(200); - // Transmit MIFARE_CLASSIC_AUTH - ReaderTransmit(mf_auth,sizeof(mf_auth)); + if (MF_DBGLEVEL >= 1) Dbprintf("Started. 7buid=%d", _7BUID); + // calibrate mkseconds counter + GetDeltaCountUS(); + while (true) { + WDT_HIT(); - // Receive the (16 bit) "random" nonce - if (!ReaderReceive(receivedAnswer)) continue; - memcpy(nt,receivedAnswer,4); + if(BUTTON_PRESS()) { + break; + } - // Transmit reader nonce and reader answer - ReaderTransmitPar(mf_nr_ar,sizeof(mf_nr_ar),par); + // find reader field + // Vref = 3300mV, and an 10:1 voltage divider on the input + // can measure voltages up to 33000 mV + if (cardSTATE == MFEMUL_NOFIELD) { + vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10; + if (vHf > MF_MINFIELDV) { + cardSTATE_TO_IDLE(); + LED_A_ON(); + } + } + + if (cardSTATE != MFEMUL_NOFIELD) { + res = EmGetCmd(receivedCmd, &len, 100); // (+ nextCycleTimeout) + if (res == 2) { + cardSTATE = MFEMUL_NOFIELD; + LEDsoff(); + continue; + } + if(res) break; + } + + nextCycleTimeout = 0; + +// if (len) Dbprintf("len:%d cmd: %02x %02x %02x %02x", len, receivedCmd[0], receivedCmd[1], receivedCmd[2], receivedCmd[3]); + + if (len != 4 && cardSTATE != MFEMUL_NOFIELD) { // len != 4 <---- speed up the code 4 authentication + // REQ or WUP request in ANY state and WUP in HALTED state + if (len == 1 && ((receivedCmd[0] == 0x26 && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == 0x52)) { + selTimer = GetTickCount(); + EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52)); + cardSTATE = MFEMUL_SELECT1; + + // init crypto block + LED_B_OFF(); + LED_C_OFF(); + crypto1_destroy(pcs); + cardAUTHKEY = 0xff; + } + } + + switch (cardSTATE) { + case MFEMUL_NOFIELD:{ + break; + } + case MFEMUL_HALTED:{ + break; + } + case MFEMUL_IDLE:{ + break; + } + case MFEMUL_SELECT1:{ + // select all + if (len == 2 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x20)) { + EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1)); + break; + } - // Receive 4 bit answer - if (ReaderReceive(receivedAnswer)) - { - if (nt_diff == 0) - { - LED_A_ON(); - memcpy(nt_attacked,nt,4); - par_mask = 0xf8; - par_low = par & 0x07; - } + // select card + if (len == 9 && + (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) { + if (!_7BUID) + EmSendCmd(rSAK, sizeof(rSAK)); + else + EmSendCmd(rSAK1, sizeof(rSAK1)); + + 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; + break; + } + } + + break; + } + case MFEMUL_SELECT2:{ + if (!len) break; + + if (len == 2 && (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x20)) { + EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2)); + break; + } - if (memcmp(nt,nt_attacked,4) != 0) continue; + // select 2 card + if (len == 9 && + (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) { + EmSendCmd(rSAK, sizeof(rSAK)); - led_on = !led_on; - if(led_on) LED_B_ON(); else LED_B_OFF(); - par_list[nt_diff] = par; - ks_list[nt_diff] = receivedAnswer[0]^0x05; + 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) break; + cardSTATE = MFEMUL_WORK; + goto lbWORK; + } + case MFEMUL_AUTH1:{ + if (len == 8) { + // --- crypto + rn_enc = bytes_to_num(receivedCmd, 4); + cardRn = rn_enc ^ crypto1_word(pcs, rn_enc , 1); + cardRr = bytes_to_num(&receivedCmd[4], 4) ^ crypto1_word(pcs, 0, 0); + // test if auth OK + if (cardRr != prng_successor(nonce, 64)){ + if (MF_DBGLEVEL >= 4) Dbprintf("AUTH FAILED. cardRr=%08x, succ=%08x", cardRr, prng_successor(nonce, 64)); + cardSTATE_TO_IDLE(); + 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)); + cardSTATE = MFEMUL_AUTH2; + } else { + cardSTATE_TO_IDLE(); + } + if (cardSTATE != MFEMUL_AUTH2) break; + } + case MFEMUL_AUTH2:{ + LED_C_ON(); + cardSTATE = MFEMUL_WORK; + if (MF_DBGLEVEL >= 4) Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d", cardAUTHSC, cardAUTHKEY, GetTickCount() - authTimer); + break; + } + case MFEMUL_WORK:{ +lbWORK: if (len == 0) break; + + if (cardAUTHKEY == 0xff) { + // first authentication + if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) { + authTimer = GetTickCount(); + + cardAUTHSC = receivedCmd[1] / 4; // received block num + cardAUTHKEY = receivedCmd[0] - 0x60; + + // --- crypto + crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY)); + ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); + num_to_bytes(nonce, 4, rAUTH_AT); + EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT)); + // --- crypto + +// last working revision +// EmSendCmd14443aRaw(resp1, resp1Len, 0); +// LogTrace(NULL, 0, GetDeltaCountUS(), 0, true); + + cardSTATE = MFEMUL_AUTH1; + nextCycleTimeout = 10; + break; + } + } else { + // decrypt seqence + mf_crypto1_decrypt(pcs, receivedCmd, len); + + // nested authentication + if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) { + authTimer = GetTickCount(); + + cardAUTHSC = receivedCmd[1] / 4; // received block num + cardAUTHKEY = receivedCmd[0] - 0x60; + + // --- crypto + crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY)); + ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); + num_to_bytes(ans, 4, rAUTH_AT); + EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT)); + // --- crypto + + cardSTATE = MFEMUL_AUTH1; + nextCycleTimeout = 10; + break; + } + } + + // rule 13 of 7.5.3. in ISO 14443-4. chaining shall be continued + // BUT... ACK --> NACK + if (len == 1 && receivedCmd[0] == CARD_ACK) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + break; + } + + // rule 12 of 7.5.3. in ISO 14443-4. R(NAK) --> R(ACK) + if (len == 1 && receivedCmd[0] == CARD_NACK_NA) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK)); + break; + } + + // read block + if (len == 4 && receivedCmd[0] == 0x30) { + if (receivedCmd[1] >= 16 * 4 || receivedCmd[1] / 4 != cardAUTHSC) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + break; + } + emlGetMem(response, receivedCmd[1], 1); + AppendCrc14443a(response, 16); + mf_crypto1_encrypt(pcs, response, 18, &par); + EmSendCmdPar(response, 18, par); + break; + } + + // write block + if (len == 4 && receivedCmd[0] == 0xA0) { + if (receivedCmd[1] >= 16 * 4 || receivedCmd[1] / 4 != cardAUTHSC) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + break; + } + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK)); + nextCycleTimeout = 50; + cardSTATE = MFEMUL_WRITEBL2; + cardWRBL = receivedCmd[1]; + break; + } + + // works with cardINTREG + + // increment, decrement, restore + if (len == 4 && (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2)) { + if (receivedCmd[1] >= 16 * 4 || + receivedCmd[1] / 4 != cardAUTHSC || + emlCheckValBl(receivedCmd[1])) { + 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; + cardWRBL = receivedCmd[1]; + + break; + } + - // Test if the information is complete - if (nt_diff == 0x07) break; + // transfer + if (len == 4 && receivedCmd[0] == 0xB0) { + if (receivedCmd[1] >= 16 * 4 || receivedCmd[1] / 4 != cardAUTHSC) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + break; + } + + if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd[1])) + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + else + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK)); + + break; + } - nt_diff = (nt_diff+1) & 0x07; - mf_nr_ar[3] = nt_diff << 5; - par = par_low; - } else { - if (nt_diff == 0) - { - par++; - } else { - par = (((par>>3)+1) << 3) | par_low; - } - } - } + // halt + if (len == 4 && (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00)) { + LED_B_OFF(); + LED_C_OFF(); + cardSTATE = MFEMUL_HALTED; + if (MF_DBGLEVEL >= 4) Dbprintf("--> HALTED. Selected time: %d ms", GetTickCount() - selTimer); + break; + } + + // command not allowed + if (len == 4) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + break; + } - LogTrace(nt,4,0,GetParity(nt,4),TRUE); - LogTrace(par_list,8,0,GetParity(par_list,8),TRUE); - LogTrace(ks_list,8,0,GetParity(ks_list,8),TRUE); + // case break + break; + } + case MFEMUL_WRITEBL2:{ + if (len == 18){ + mf_crypto1_decrypt(pcs, receivedCmd, len); + emlSetMem(receivedCmd, cardWRBL, 1); + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK)); + cardSTATE = MFEMUL_WORK; + break; + } else { + cardSTATE_TO_IDLE(); + break; + } + break; + } + + case MFEMUL_INTREG_INC:{ + mf_crypto1_decrypt(pcs, receivedCmd, len); + memcpy(&ans, receivedCmd, 4); + if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + cardSTATE_TO_IDLE(); + break; + } + cardINTREG = cardINTREG + ans; + cardSTATE = MFEMUL_WORK; + break; + } + case MFEMUL_INTREG_DEC:{ + mf_crypto1_decrypt(pcs, receivedCmd, len); + memcpy(&ans, receivedCmd, 4); + if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + cardSTATE_TO_IDLE(); + break; + } + cardINTREG = cardINTREG - ans; + cardSTATE = MFEMUL_WORK; + break; + } + case MFEMUL_INTREG_REST:{ + mf_crypto1_decrypt(pcs, receivedCmd, len); + memcpy(&ans, receivedCmd, 4); + if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) { + EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + cardSTATE_TO_IDLE(); + break; + } + cardSTATE = MFEMUL_WORK; + break; + } + + } + + } - // Thats it... FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LEDsoff(); - tracing = TRUE; + + // add trace trailer + memset(rAUTH_NT, 0x44, 4); + LogTrace(rAUTH_NT, 4, 0, 0, TRUE); + + if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, traceLen); }