X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/bd20f8f47847787e1f3e933043933272908c5beb..cee5a30d53c7aff4c4830eae53eaf58414ecf806:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 2e91d263..1c5e9265 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -1,5 +1,6 @@ //----------------------------------------------------------------------------- // 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 @@ -14,20 +15,28 @@ #include "string.h" #include "iso14443crc.h" +#include "iso14443a.h" static uint8_t *trace = (uint8_t *) BigBuf; static int traceLen = 0; static int rsamples = 0; static int tracing = TRUE; - -typedef enum { - SEC_D = 1, - SEC_E = 2, - SEC_F = 3, - SEC_X = 4, - SEC_Y = 5, - SEC_Z = 6 -} SecType; +static uint32_t iso14a_timeout; + +// CARD TO READER +// 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 +// Sequence X: 00001100 drop after half a period +// Sequence Y: 00000000 no drop +// Sequence Z: 11000000 drop at start +#define SEC_D 0xf0 +#define SEC_E 0x0f +#define SEC_F 0x00 +#define SEC_X 0x0c +#define SEC_Y 0x00 +#define SEC_Z 0xc0 static const uint8_t OddByteParity[256] = { 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, @@ -55,6 +64,11 @@ static const uint8_t OddByteParity[256] = { #define DMA_BUFFER_SIZE 4096 #define TRACE_LENGTH 3000 +uint8_t trigger = 0; +void iso14a_set_trigger(int enable) { + trigger = enable; +} + //----------------------------------------------------------------------------- // Generate the parity value for a byte sequence // @@ -72,7 +86,7 @@ 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); } @@ -101,11 +115,6 @@ int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, return TRUE; } -int LogTraceInfo(byte_t* data, size_t len) -{ - return LogTrace(data,len,0,GetParity(data,len),TRUE); -} - //----------------------------------------------------------------------------- // The software UART that receives commands from the reader, and its state // variables. @@ -137,7 +146,7 @@ static struct { uint8_t *output; } Uart; -static int MillerDecoding(int bit) +static RAMFUNC int MillerDecoding(int bit) { int error = 0; int bitright; @@ -339,7 +348,7 @@ 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 @@ -401,7 +410,7 @@ static struct { uint8_t *output; } Demod; -static int ManchesterDecoding(int v) +static RAMFUNC int ManchesterDecoding(int v) { int bit; int modulation; @@ -422,28 +431,29 @@ 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; @@ -453,6 +463,7 @@ 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; @@ -597,7 +608,7 @@ 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 @@ -608,7 +619,7 @@ void SnoopIso14443a(void) // We won't start recording the frames that we acquire until we trigger; // a good trigger condition to get started is probably when we see a // response from the tag. - int triggered = TRUE; // FALSE to wait first for card + int triggered = FALSE; // FALSE to wait first for card // The command (reader -> tag) that we're receiving. // The length of a received command will in most cases be no more than 18 bytes. @@ -620,7 +631,8 @@ 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; @@ -632,7 +644,7 @@ 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); @@ -641,6 +653,12 @@ void SnoopIso14443a(void) Demod.len = 0; Demod.state = DEMOD_UNSYNCD; + // Setup for the DMA. + FpgaSetupSsc(); + upTo = dmaBuf; + lastRxCounter = DMA_BUFFER_SIZE; + FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); + // And the reader -> tag commands memset(&Uart, 0, sizeof(Uart)); Uart.output = receivedCmd; @@ -653,28 +671,23 @@ void SnoopIso14443a(void) FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - // Setup for the DMA. - FpgaSetupSsc(); - upTo = dmaBuf; - lastRxCounter = DMA_BUFFER_SIZE; - FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); - - LED_A_ON(); // And now we loop, receiving samples. for(;;) { - WDT_HIT(); + LED_A_ON(); + WDT_HIT(); int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1); if(behindBy > maxBehindBy) { maxBehindBy = behindBy; if(behindBy > 400) { - DbpString("blew circular buffer!"); + Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); goto done; } } if(behindBy < 1) continue; + LED_A_OFF(); smpl = upTo[0]; upTo++; lastRxCounter -= 1; @@ -686,60 +699,58 @@ void SnoopIso14443a(void) } samples += 4; -#define HANDLE_BIT_IF_BODY \ - LED_C_ON(); \ - if(triggered) { \ - trace[traceLen++] = ((rsamples >> 0) & 0xff); \ - trace[traceLen++] = ((rsamples >> 8) & 0xff); \ - trace[traceLen++] = ((rsamples >> 16) & 0xff); \ - trace[traceLen++] = ((rsamples >> 24) & 0xff); \ - trace[traceLen++] = ((Uart.parityBits >> 0) & 0xff); \ - trace[traceLen++] = ((Uart.parityBits >> 8) & 0xff); \ - trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff); \ - trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff); \ - trace[traceLen++] = Uart.byteCnt; \ - memcpy(trace+traceLen, receivedCmd, Uart.byteCnt); \ - traceLen += Uart.byteCnt; \ - if(traceLen > TRACE_LENGTH) break; \ - } \ - /* And ready to receive another command. */ \ - Uart.state = STATE_UNSYNCD; \ - /* And also reset the demod code, which might have been */ \ - /* false-triggered by the commands from the reader. */ \ - Demod.state = DEMOD_UNSYNCD; \ - LED_B_OFF(); \ - - if(MillerDecoding((smpl & 0xF0) >> 4)) { + if(MillerDecoding((smpl & 0xF0) >> 4)) { rsamples = samples - Uart.samples; - HANDLE_BIT_IF_BODY + LED_C_ON(); + if(triggered) { + trace[traceLen++] = ((rsamples >> 0) & 0xff); + trace[traceLen++] = ((rsamples >> 8) & 0xff); + trace[traceLen++] = ((rsamples >> 16) & 0xff); + trace[traceLen++] = ((rsamples >> 24) & 0xff); + trace[traceLen++] = ((Uart.parityBits >> 0) & 0xff); + trace[traceLen++] = ((Uart.parityBits >> 8) & 0xff); + trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff); + trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff); + trace[traceLen++] = Uart.byteCnt; + memcpy(trace+traceLen, receivedCmd, Uart.byteCnt); + traceLen += Uart.byteCnt; + if(traceLen > TRACE_LENGTH) break; + } + /* And ready to receive another command. */ + Uart.state = STATE_UNSYNCD; + /* And also reset the demod code, which might have been */ + /* false-triggered by the commands from the reader. */ + Demod.state = DEMOD_UNSYNCD; + LED_B_OFF(); } - if(ManchesterDecoding(smpl & 0x0F)) { - rsamples = samples - Demod.samples; - LED_B_ON(); - - // timestamp, as a count of samples - trace[traceLen++] = ((rsamples >> 0) & 0xff); - trace[traceLen++] = ((rsamples >> 8) & 0xff); - trace[traceLen++] = ((rsamples >> 16) & 0xff); - trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff); - trace[traceLen++] = ((Demod.parityBits >> 0) & 0xff); - trace[traceLen++] = ((Demod.parityBits >> 8) & 0xff); - trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff); - trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff); - // length - trace[traceLen++] = Demod.len; - memcpy(trace+traceLen, receivedResponse, Demod.len); - traceLen += Demod.len; - if(traceLen > TRACE_LENGTH) break; - - triggered = TRUE; + + if(ManchesterDecoding(smpl & 0x0F)) { + rsamples = samples - Demod.samples; + LED_B_ON(); + + // timestamp, as a count of samples + trace[traceLen++] = ((rsamples >> 0) & 0xff); + trace[traceLen++] = ((rsamples >> 8) & 0xff); + trace[traceLen++] = ((rsamples >> 16) & 0xff); + trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff); + trace[traceLen++] = ((Demod.parityBits >> 0) & 0xff); + trace[traceLen++] = ((Demod.parityBits >> 8) & 0xff); + trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff); + trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff); + // length + trace[traceLen++] = Demod.len; + memcpy(trace+traceLen, receivedResponse, Demod.len); + traceLen += Demod.len; + if(traceLen > TRACE_LENGTH) break; + + triggered = TRUE; // And ready to receive another response. memset(&Demod, 0, sizeof(Demod)); Demod.output = receivedResponse; Demod.state = DEMOD_UNSYNCD; - LED_C_OFF(); - } + LED_C_OFF(); + } if(BUTTON_PRESS()) { DbpString("cancelled_a"); @@ -762,47 +773,6 @@ done: LED_D_OFF(); } -// Prepare communication bits to send to FPGA -void Sequence(SecType seq) -{ - ToSendMax++; - switch(seq) { - // CARD TO READER - case SEC_D: - // Sequence D: 11110000 - // modulation with subcarrier during first half - ToSend[ToSendMax] = 0xf0; - break; - case SEC_E: - // Sequence E: 00001111 - // modulation with subcarrier during second half - ToSend[ToSendMax] = 0x0f; - break; - case SEC_F: - // Sequence F: 00000000 - // no modulation with subcarrier - ToSend[ToSendMax] = 0x00; - break; - // READER TO CARD - case SEC_X: - // Sequence X: 00001100 - // drop after half a period - ToSend[ToSendMax] = 0x0c; - break; - case SEC_Y: - default: - // Sequence Y: 00000000 - // no drop - ToSend[ToSendMax] = 0x00; - break; - case SEC_Z: - // Sequence Z: 11000000 - // drop at start - ToSend[ToSendMax] = 0xc0; - break; - } -} - //----------------------------------------------------------------------------- // Prepare tag messages //----------------------------------------------------------------------------- @@ -824,7 +794,7 @@ static void CodeIso14443aAsTag(const uint8_t *cmd, int len) ToSendStuffBit(0); // Send startbit - Sequence(SEC_D); + ToSend[++ToSendMax] = SEC_D; for(i = 0; i < len; i++) { int j; @@ -835,27 +805,27 @@ static void CodeIso14443aAsTag(const uint8_t *cmd, int len) for(j = 0; j < 8; j++) { oddparity ^= (b & 1); if(b & 1) { - Sequence(SEC_D); + ToSend[++ToSendMax] = SEC_D; } else { - Sequence(SEC_E); + ToSend[++ToSendMax] = SEC_E; } b >>= 1; } // Parity bit if(oddparity) { - Sequence(SEC_D); + ToSend[++ToSendMax] = SEC_D; } else { - Sequence(SEC_E); + ToSend[++ToSendMax] = SEC_E; } } // Send stopbit - Sequence(SEC_F); + ToSend[++ToSendMax] = SEC_F; // Flush the buffer in FPGA!! for(i = 0; i < 5; i++) { - Sequence(SEC_F); + ToSend[++ToSendMax] = SEC_F; } // Convert from last byte pos to length @@ -887,23 +857,23 @@ static void CodeStrangeAnswer() ToSendStuffBit(0); // Send startbit - Sequence(SEC_D); + ToSend[++ToSendMax] = SEC_D; // 0 - Sequence(SEC_E); + ToSend[++ToSendMax] = SEC_E; // 0 - Sequence(SEC_E); + ToSend[++ToSendMax] = SEC_E; // 1 - Sequence(SEC_D); + ToSend[++ToSendMax] = SEC_D; // Send stopbit - Sequence(SEC_F); + ToSend[++ToSendMax] = SEC_F; // Flush the buffer in FPGA!! for(i = 0; i < 5; i++) { - Sequence(SEC_F); + ToSend[++ToSendMax] = SEC_F; } // Convert from last byte pos to length @@ -974,8 +944,6 @@ void SimulateIso14443aTag(int tagType, int TagUid) // static const uint8_t cmd2[] = { 0x93, 0x20 }; //static const uint8_t response2[] = { 0x9a, 0xe5, 0xe4, 0x43, 0xd8 }; // original value - greg - - // my desfire static const uint8_t response2[] = { 0x88, 0x04, 0x21, 0x3f, 0x4d }; // known uid - note cascade (0x88), 2nd byte (0x04) = NXP/Phillips @@ -989,7 +957,6 @@ ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); static const uint8_t response2a[] = { 0x51, 0x48, 0x1d, 0x80, 0x84 }; // uid - cascade2 - 2nd half (4 bytes) of UID+ BCCheck // NOTE : THE CRC on the above may be wrong as I have obfuscated the actual UID - // When reader selects us during cascade2 it will send cmd3a //uint8_t response3a[] = { 0x00, 0x00, 0x00 }; // SAK Select (cascade2) successful response (ULTRALITE) uint8_t response3a[] = { 0x20, 0x00, 0x00 }; // SAK Select (cascade2) successful response (DESFire) @@ -1013,7 +980,6 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); // 166 bytes, since every bit that needs to be send costs us a byte // - // Respond with card type uint8_t *resp1 = (((uint8_t *)BigBuf) + 800); int resp1Len; @@ -1288,86 +1254,6 @@ static void TransmitFor14443a(const uint8_t *cmd, int len, int *samples, int *wa if (samples) *samples = (c + *wait) << 3; } -//----------------------------------------------------------------------------- -// To generate an arbitrary stream from reader -// -//----------------------------------------------------------------------------- -void ArbitraryFromReader(const uint8_t *cmd, int parity, int len) -{ - int i; - int j; - int last; - uint8_t b; - - ToSendReset(); - - // Start of Communication (Seq. Z) - Sequence(SEC_Z); - last = 0; - - for(i = 0; i < len; i++) { - // Data bits - b = cmd[i]; - for(j = 0; j < 8; j++) { - if(b & 1) { - // Sequence X - Sequence(SEC_X); - last = 1; - } else { - if(last == 0) { - // Sequence Z - Sequence(SEC_Z); - } - else { - // Sequence Y - Sequence(SEC_Y); - last = 0; - } - } - b >>= 1; - - } - - // Predefined parity bit, the flipper flips when needed, because of flips in byte sent - if(((parity >> (len - i - 1)) & 1)) { - // Sequence X - Sequence(SEC_X); - last = 1; - } else { - if(last == 0) { - // Sequence Z - Sequence(SEC_Z); - } - else { - // Sequence Y - Sequence(SEC_Y); - last = 0; - } - } - } - - // End of Communication - if(last == 0) { - // Sequence Z - Sequence(SEC_Z); - } - else { - // Sequence Y - Sequence(SEC_Y); - last = 0; - } - // Sequence Y - Sequence(SEC_Y); - - // Just to be sure! - Sequence(SEC_Y); - Sequence(SEC_Y); - Sequence(SEC_Y); - - // Convert from last character reference to length - ToSendMax++; -} - //----------------------------------------------------------------------------- // Code a 7-bit command without parity bit // This is especially for 0x26 and 0x52 (REQA and WUPA) @@ -1381,23 +1267,23 @@ void ShortFrameFromReader(const uint8_t bt) ToSendReset(); // Start of Communication (Seq. Z) - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; last = 0; b = bt; for(j = 0; j < 7; j++) { if(b & 1) { // Sequence X - Sequence(SEC_X); + ToSend[++ToSendMax] = SEC_X; last = 1; } else { if(last == 0) { // Sequence Z - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; } else { // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; last = 0; } } @@ -1407,20 +1293,20 @@ void ShortFrameFromReader(const uint8_t bt) // End of Communication if(last == 0) { // Sequence Z - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; } else { // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; last = 0; } // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; // Just to be sure! - Sequence(SEC_Y); - Sequence(SEC_Y); - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; + ToSend[++ToSendMax] = SEC_Y; + ToSend[++ToSendMax] = SEC_Y; // Convert from last character reference to length ToSendMax++; @@ -1439,7 +1325,7 @@ void CodeIso14443aAsReaderPar(const uint8_t * cmd, int len, uint32_t dwParity) ToSendReset(); // Start of Communication (Seq. Z) - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; last = 0; // Generate send structure for the data bits @@ -1450,15 +1336,15 @@ void CodeIso14443aAsReaderPar(const uint8_t * cmd, int len, uint32_t dwParity) for (j = 0; j < 8; j++) { if (b & 1) { // Sequence X - Sequence(SEC_X); + ToSend[++ToSendMax] = SEC_X; last = 1; } else { if (last == 0) { // Sequence Z - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; } else { // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; last = 0; } } @@ -1468,15 +1354,15 @@ void CodeIso14443aAsReaderPar(const uint8_t * cmd, int len, uint32_t dwParity) // Get the parity bit if ((dwParity >> i) & 0x01) { // Sequence X - Sequence(SEC_X); + ToSend[++ToSendMax] = SEC_X; last = 1; } else { if (last == 0) { // Sequence Z - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; } else { // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; last = 0; } } @@ -1485,19 +1371,19 @@ void CodeIso14443aAsReaderPar(const uint8_t * cmd, int len, uint32_t dwParity) // End of Communication if (last == 0) { // Sequence Z - Sequence(SEC_Z); + ToSend[++ToSendMax] = SEC_Z; } else { // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; last = 0; } // Sequence Y - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; // Just to be sure! - Sequence(SEC_Y); - Sequence(SEC_Y); - Sequence(SEC_Y); + ToSend[++ToSendMax] = SEC_Y; + ToSend[++ToSendMax] = SEC_Y; + ToSend[++ToSendMax] = SEC_Y; // Convert from last character reference to length ToSendMax++; @@ -1514,31 +1400,31 @@ 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 < 512) { c++; } else { return FALSE; } - b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - if(ManchesterDecoding((b & 0xf0) >> 4)) { + } + 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; } @@ -1546,8 +1432,8 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, int maxLen, int *samples = c << 3; return TRUE; } - } - } + } + } } void ReaderTransmitShort(const uint8_t* bt) @@ -1575,6 +1461,8 @@ 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); @@ -1592,131 +1480,171 @@ int ReaderReceive(uint8_t* receivedAnswer) int samples = 0; if (!GetIso14443aAnswerFromTag(receivedAnswer,100,&samples,0)) return FALSE; if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE); - return TRUE; + if(samples == 0) return FALSE; + return Demod.len; } -//----------------------------------------------------------------------------- -// Read an ISO 14443a tag. Send out commands and store answers. -// -//----------------------------------------------------------------------------- -void ReaderIso14443a(uint32_t parameter) -{ - // Anticollision +/* performs iso14443a anticolision procedure + * 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) { uint8_t wupa[] = { 0x52 }; 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 - // Mifare AUTH - uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; -// uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00 }; + uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes + uint8_t* uid = resp + 7; - uint8_t* receivedAnswer = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes - traceLen = 0; + uint8_t sak = 0x04; // cascade uid + int cascade_level = 0; - // Setup SSC - FpgaSetupSsc(); + int len; - // Start from off (no field generated) - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - SpinDelay(200); + // 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; - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(); + if(resp_data) + memcpy(resp_data->atqa, resp, 2); + + ReaderTransmit(sel_all,sizeof(sel_all)); + if(!ReaderReceive(uid)) return 0; - // Now give it time to spin up. - // Signal field is on with the appropriate LED - LED_D_ON(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - SpinDelay(200); + // 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 + // While the UID is not complete, the 3nd bit (from the right) is set in the SAK. + for(; sak & 0x04; cascade_level++) + { + // SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97) + sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2; - LED_A_ON(); - LED_B_OFF(); - LED_C_OFF(); + // SELECT_ALL + ReaderTransmit(sel_all,sizeof(sel_all)); + if (!ReaderReceive(resp)) return 0; + if(uid_ptr) memcpy(uid_ptr + cascade_level*4, resp, 4); - while(traceLen < TRACE_LENGTH) - { - // Broadcast for a card, WUPA (0x52) will force response from all cards in the field - ReaderTransmitShort(wupa); + // Construct SELECT UID command + memcpy(sel_uid+2,resp,5); + AppendCrc14443a(sel_uid,7); + ReaderTransmit(sel_uid,sizeof(sel_uid)); - // Test if the action was cancelled - if(BUTTON_PRESS()) { - break; - } + // Receive the SAK + if (!ReaderReceive(resp)) return 0; + sak = resp[0]; + } + if(resp_data) { + resp_data->sak = sak; + resp_data->ats_len = 0; + } - // Receive the ATQA - if (!ReaderReceive(receivedAnswer)) continue; + if( (sak & 0x20) == 0) + return 2; // non iso14443a compliant tag - // Transmit SELECT_ALL - ReaderTransmit(sel_all,sizeof(sel_all)); + // Request for answer to select + AppendCrc14443a(rats, 2); + ReaderTransmit(rats, sizeof(rats)); + if (!(len = ReaderReceive(resp))) return 0; + if(resp_data) { + memcpy(resp_data->ats, resp, sizeof(resp_data->ats)); + resp_data->ats_len = len; + } - // Receive the UID - if (!ReaderReceive(receivedAnswer)) continue; + return 1; +} - // Construct SELECT UID command - // First copy the 5 bytes (Mifare Classic) after the 93 70 - memcpy(sel_uid+2,receivedAnswer,5); - // Secondly compute the two CRC bytes at the end - AppendCrc14443a(sel_uid,7); +void iso14443a_setup() { + // Setup SSC + FpgaSetupSsc(); + // Start from off (no field generated) + // Signal field is off with the appropriate LED + LED_D_OFF(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + SpinDelay(200); - // Transmit SELECT_UID - ReaderTransmit(sel_uid,sizeof(sel_uid)); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - // Receive the SAK - if (!ReaderReceive(receivedAnswer)) continue; + // Now give it time to spin up. + // Signal field is on with the appropriate LED + LED_D_ON(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); + SpinDelay(200); - // OK we have selected 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 (receivedAnswer[0] &= 0x04) - { - // Transmit SELECT_ALL - ReaderTransmit(sel_all_c2,sizeof(sel_all_c2)); + iso14a_timeout = 2048; //default +} - // Receive the UID - if (!ReaderReceive(receivedAnswer)) continue; +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; +} - // Construct SELECT UID command - memcpy(sel_uid_c2+2,receivedAnswer,5); - // Secondly compute the two CRC bytes at the end - AppendCrc14443a(sel_uid_c2,7); - // Transmit SELECT_UID - ReaderTransmit(sel_uid_c2,sizeof(sel_uid_c2)); +//----------------------------------------------------------------------------- +// Read an ISO 14443a tag. Send out commands and store answers. +// +//----------------------------------------------------------------------------- +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]; - // Receive the SAK - if (!ReaderReceive(receivedAnswer)) continue; - } + if(param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(1); - // Transmit MIFARE_CLASSIC_AUTH - ReaderTransmit(mf_auth,sizeof(mf_auth)); + if(param & ISO14A_CONNECT) { + iso14443a_setup(); + ack->arg[0] = iso14443a_select_card(ack->d.asBytes, (iso14a_card_select_t *) (ack->d.asBytes+12)); + UsbSendPacket((void *)ack, sizeof(UsbCommand)); + } - // Receive the (16 bit) "random" nonce - if (!ReaderReceive(receivedAnswer)) continue; + if(param & ISO14A_SET_TIMEOUT) { + iso14a_timeout = c->arg[2]; } - // Thats it... + 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(); - Dbprintf("%x %x %x", rsamples, 0xCC, 0xCC); - DbpString("ready.."); } - //----------------------------------------------------------------------------- // Read an ISO 14443a tag. Send out commands and store answers. // //----------------------------------------------------------------------------- void ReaderMifare(uint32_t parameter) { - - // Anticollision - uint8_t wupa[] = { 0x52 }; - uint8_t sel_all[] = { 0x93,0x20 }; - uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; - // Mifare AUTH uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; @@ -1725,42 +1653,12 @@ void ReaderMifare(uint32_t parameter) traceLen = 0; tracing = false; - // Setup SSC - FpgaSetupSsc(); - - // Start from off (no field generated) - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - SpinDelay(200); - - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(); - - // Now give it time to spin up. - // Signal field is on with the appropriate LED - LED_D_ON(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - SpinDelay(200); + iso14443a_setup(); LED_A_ON(); LED_B_OFF(); LED_C_OFF(); - // Broadcast for a card, WUPA (0x52) will force response from all cards in the field - ReaderTransmitShort(wupa); - // Receive the ATQA - ReaderReceive(receivedAnswer); - // Transmit SELECT_ALL - ReaderTransmit(sel_all,sizeof(sel_all)); - // Receive the UID - ReaderReceive(receivedAnswer); - // Construct SELECT UID command - // First copy the 5 bytes (Mifare Classic) after the 93 70 - memcpy(sel_uid+2,receivedAnswer,5); - // Secondly compute the two CRC bytes at the end - AppendCrc14443a(sel_uid,7); - byte_t nt_diff = 0; LED_A_OFF(); byte_t par = 0; @@ -1781,28 +1679,12 @@ void ReaderMifare(uint32_t parameter) SpinDelay(200); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - // Broadcast for a card, WUPA (0x52) will force response from all cards in the field - ReaderTransmitShort(wupa); - // Test if the action was cancelled if(BUTTON_PRESS()) { break; } - // Receive the ATQA - if (!ReaderReceive(receivedAnswer)) continue; - - // Transmit SELECT_ALL - ReaderTransmit(sel_all,sizeof(sel_all)); - - // Receive the UID - if (!ReaderReceive(receivedAnswer)) continue; - - // Transmit SELECT_UID - ReaderTransmit(sel_uid,sizeof(sel_uid)); - - // Receive the SAK - if (!ReaderReceive(receivedAnswer)) continue; + if(!iso14443a_select_card(NULL, NULL)) continue; // Transmit MIFARE_CLASSIC_AUTH ReaderTransmit(mf_auth,sizeof(mf_auth)); @@ -1848,10 +1730,9 @@ void ReaderMifare(uint32_t parameter) } } - LogTraceInfo(sel_uid+2,4); - LogTraceInfo(nt,4); - LogTraceInfo(par_list,8); - LogTraceInfo(ks_list,8); + 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); // Thats it... FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);