X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/912a3e94e48952b6a117b4ec9c9623c0ceea1270..81cd0474cb4dc85fcc78f70ad238cb684851f75f:/armsrc/iso14443a.c diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 13a00aba..7ff13ae9 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -104,7 +104,7 @@ void AppendCrc14443a(uint8_t* data, int len) int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, int bReader) { // Return when trace is full - if (traceLen >= TRACE_LENGTH) return FALSE; + if (traceLen >= TRACE_SIZE) return FALSE; // Trace the random, i'm curious rsamples += iSamples; @@ -624,7 +624,7 @@ void RAMFUNC SnoopIso14443a(void) // #define RECV_RES_OFFSET 2096 // original (working as of 21/2/09) values // #define DMA_BUFFER_OFFSET 2160 // original (working as of 21/2/09) values // #define DMA_BUFFER_SIZE 4096 // original (working as of 21/2/09) values -// #define TRACE_LENGTH 2000 // original (working as of 21/2/09) values +// #define TRACE_SIZE 2000 // original (working as of 21/2/09) values // 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 @@ -656,7 +656,7 @@ void RAMFUNC SnoopIso14443a(void) int samples = 0; int rsamples = 0; - memset(trace, 0x44, RECV_CMD_OFFSET); + memset(trace, 0x44, TRACE_SIZE); // Set up the demodulator for tag -> reader responses. Demod.output = receivedResponse; @@ -724,7 +724,7 @@ void RAMFUNC SnoopIso14443a(void) trace[traceLen++] = Uart.byteCnt; memcpy(trace+traceLen, receivedCmd, Uart.byteCnt); traceLen += Uart.byteCnt; - if(traceLen > TRACE_LENGTH) break; + if(traceLen > TRACE_SIZE) break; } /* And ready to receive another command. */ Uart.state = STATE_UNSYNCD; @@ -751,7 +751,7 @@ void RAMFUNC SnoopIso14443a(void) trace[traceLen++] = Demod.len; memcpy(trace+traceLen, receivedResponse, Demod.len); traceLen += Demod.len; - if(traceLen > TRACE_LENGTH) break; + if(traceLen > TRACE_SIZE) break; triggered = TRUE; @@ -964,15 +964,102 @@ static int EmSendCmd14443aRaw(uint8_t *resp, int respLen, int correctionNeeded); // Main loop of simulated tag: receive commands from reader, decide what // response to send, and send it. //----------------------------------------------------------------------------- -void SimulateIso14443aTag(int tagType, int TagUid) +void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd) { + // Enable and clear the trace + tracing = TRUE; + traceLen = 0; + memset(trace, 0x44, TRACE_SIZE); + // This function contains the tag emulation + uint8_t sak; + + // The first response contains the ATQA (note: bytes are transmitted in reverse order). + uint8_t response1[2]; + + switch (tagType) { + case 1: { // MIFARE Classic + // Says: I am Mifare 1k - original line + response1[0] = 0x04; + response1[1] = 0x00; + sak = 0x08; + } break; + case 2: { // MIFARE Ultralight + // Says: I am a stupid memory tag, no crypto + response1[0] = 0x04; + 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) + response1[0] = 0x04; + response1[1] = 0x00; + sak = 0x28; + } break; + default: { + Dbprintf("Error: unkown tagtype (%d)",tagType); + return; + } break; + } + + // The second response contains the (mandatory) first 24 bits of the UID + uint8_t response2[5]; + + // Check if the uid uses the (optional) part + uint8_t response2a[5]; + if (uid_2nd) { + response2[0] = 0x88; + num_to_bytes(uid_1st,3,response2+1); + num_to_bytes(uid_2nd,4,response2a); + response2a[4] = response2a[0] ^ response2a[1] ^ response2a[2] ^ response2a[3]; + + // Configure the ATQA and SAK accordingly + response1[0] |= 0x40; + sak |= 0x04; + } else { + num_to_bytes(uid_1st,4,response2); + // Configure the ATQA and SAK accordingly + response1[0] &= 0xBF; + sak &= 0xFB; + } + + // Calculate the BitCountCheck (BCC) for the first 4 bytes of the UID. + response2[4] = response2[0] ^ response2[1] ^ response2[2] ^ response2[3]; + + // Prepare the mandatory SAK (for 4 and 7 byte UID) + uint8_t response3[3]; + response3[0] = sak; + ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); + + // Prepare the optional second SAK (for 7 byte UID), drop the cascade bit + uint8_t response3a[3]; + response3a[0] = sak & 0xFB; + ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); + + +/* + // Check if the uid uses the (optional) second part + if (uid_2nd) { + // Configure the ATQA and SAK accordingly + response1[0] |= 0x40; + sak |= 0x04; + } +*/ + +//static const uint8_t response2a[] = { 0x51, 0x48, 0x1d, 0x80, 0x84 }; // uid - cascade2 - 2nd half (4 bytes) of UID+ BCCheck + // Prepare protocol messages // static const uint8_t cmd1[] = { 0x26 }; // static const uint8_t response1[] = { 0x02, 0x00 }; // Says: I am Mifare 4k - original line - greg // - static const uint8_t response1[] = { 0x44, 0x03 }; // Says: I am a DESFire Tag, ph33r me +// uint8_t response1[] = { 0x44, 0x03 }; // Says: I am a DESFire Tag, ph33r me // static const uint8_t response1[] = { 0x44, 0x00 }; // Says: I am a ULTRALITE Tag, 0wn me // UID response @@ -980,29 +1067,29 @@ void SimulateIso14443aTag(int tagType, int TagUid) //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 +// uint8_t response2[] = { 0x88, 0x04, 0x21, 0x3f, 0x4d }; // known uid - note cascade (0x88), 2nd byte (0x04) = NXP/Phillips // When reader selects us during cascade1 it will send cmd3 //uint8_t response3[] = { 0x04, 0x00, 0x00 }; // SAK Select (cascade1) successful response (ULTRALITE) -uint8_t response3[] = { 0x24, 0x00, 0x00 }; // SAK Select (cascade1) successful response (DESFire) -ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); +//uint8_t response3[] = { 0x24, 0x00, 0x00 }; // SAK Select (cascade1) successful response (DESFire) +//ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); // send cascade2 2nd half of UID -static const uint8_t response2a[] = { 0x51, 0x48, 0x1d, 0x80, 0x84 }; // uid - cascade2 - 2nd half (4 bytes) of UID+ BCCheck +//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) -ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); +//uint8_t response3a[] = { 0x20, 0x00, 0x00 }; // SAK Select (cascade2) successful response (DESFire) +//ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); static const uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce uint8_t *resp; int respLen; - // Longest possible response will be 16 bytes + 2 CRC = 18 bytes + // Longest possible response will be 16 bytes + 2 CRC = 18 bytes // This will need // 144 data bits (18 * 8) // 18 parity bits @@ -1016,11 +1103,11 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); // // Respond with card type - uint8_t *resp1 = (((uint8_t *)BigBuf) + 800); + uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET); int resp1Len; // Anticollision cascade1 - respond with uid - uint8_t *resp2 = (((uint8_t *)BigBuf) + 970); + uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 166); int resp2Len; // Anticollision cascade2 - respond with 2nd half of uid if asked @@ -1029,22 +1116,23 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); int resp2aLen; // Acknowledge select - cascade 1 - uint8_t *resp3 = (((uint8_t *)BigBuf) + 1310); + uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*2)); int resp3Len; // Acknowledge select - cascade 2 - uint8_t *resp3a = (((uint8_t *)BigBuf) + 1480); + uint8_t *resp3a = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*3)); int resp3aLen; // Response to a read request - not implemented atm - uint8_t *resp4 = (((uint8_t *)BigBuf) + 1550); + uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*4)); int resp4Len; // Authenticate response - nonce - uint8_t *resp5 = (((uint8_t *)BigBuf) + 1720); + uint8_t *resp5 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*5)); int resp5Len; - uint8_t *receivedCmd = (uint8_t *)BigBuf; + uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); +// uint8_t *receivedCmd = (uint8_t *)BigBuf; int len; //int i; @@ -1059,11 +1147,14 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); int happened = 0; int happened2 = 0; - int cmdsRecvd = 0; + int cmdsRecvd = 0; + uint8_t* respdata = NULL; + int respsize = 0; + uint8_t nack = 0x04; //int fdt_indicator; - memset(receivedCmd, 0x44, 400); + memset(receivedCmd, 0x44, RECV_CMD_SIZE); // Prepare the responses of the anticollision phase // there will be not enough time to do this at the moment the reader sends it REQA @@ -1105,7 +1196,7 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); LED_A_ON(); for(;;) { - if(!GetIso14443aCommandFromReader(receivedCmd, &len, 100)) { + if(!GetIso14443aCommandFromReader(receivedCmd, &len, RECV_CMD_SIZE)) { DbpString("button press"); break; } @@ -1116,73 +1207,88 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); if(receivedCmd[0] == 0x26) { // Received a REQUEST resp = resp1; respLen = resp1Len; order = 1; + respdata = response1; + respsize = sizeof(response1); //DbpString("Hello request from reader:"); } else if(receivedCmd[0] == 0x52) { // Received a WAKEUP resp = resp1; respLen = resp1Len; order = 6; // //DbpString("Wakeup request from reader:"); - + respdata = response1; + respsize = sizeof(response1); } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) { // greg - cascade 1 anti-collision // Received request for UID (cascade 1) resp = resp2; respLen = resp2Len; order = 2; // DbpString("UID (cascade 1) request from reader:"); // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); - - + respdata = response2; + respsize = sizeof(response2); } else if(receivedCmd[1] == 0x20 && receivedCmd[0] ==0x95) { // greg - cascade 2 anti-collision // Received request for UID (cascade 2) resp = resp2a; respLen = resp2aLen; order = 20; // DbpString("UID (cascade 2) request from reader:"); // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); - + respdata = response2a; + respsize = sizeof(response2a); } else if(receivedCmd[1] == 0x70 && receivedCmd[0] ==0x93) { // greg - cascade 1 select // Received a SELECT resp = resp3; respLen = resp3Len; order = 3; // DbpString("Select (cascade 1) request from reader:"); // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); - + respdata = response3; + respsize = sizeof(response3); } else if(receivedCmd[1] == 0x70 && receivedCmd[0] ==0x95) { // greg - cascade 2 select // Received a SELECT resp = resp3a; respLen = resp3aLen; order = 30; // DbpString("Select (cascade 2) request from reader:"); // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); - + respdata = response3a; + respsize = sizeof(response3a); } else if(receivedCmd[0] == 0x30) { // Received a READ resp = resp4; respLen = resp4Len; order = 4; // Do nothing Dbprintf("Read request from reader: %x %x %x", receivedCmd[0], receivedCmd[1], receivedCmd[2]); - + respdata = &nack; + respsize = sizeof(nack); // 4-bit answer } else if(receivedCmd[0] == 0x50) { // Received a HALT resp = resp1; respLen = 0; order = 5; // Do nothing DbpString("Reader requested we HALT!:"); + respdata = NULL; + respsize = 0; } else if(receivedCmd[0] == 0x60) { // Received an authentication request resp = resp5; respLen = resp5Len; order = 7; Dbprintf("Authenticate request from reader: %x %x %x", receivedCmd[0], receivedCmd[1], receivedCmd[2]); + respdata = NULL; + respsize = 0; } else if(receivedCmd[0] == 0xE0) { // Received a RATS request resp = resp1; respLen = 0;order = 70; Dbprintf("RATS request from reader: %x %x %x", receivedCmd[0], receivedCmd[1], receivedCmd[2]); - } else { - // Never seen this command before - Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x", + respdata = NULL; + respsize = 0; + } else { + // Never seen this command before + 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[4], receivedCmd[5], receivedCmd[6], receivedCmd[7], receivedCmd[8]); // Do not respond resp = resp1; respLen = 0; order = 0; - } + respdata = NULL; + respsize = 0; + } // Count number of wakeups received after a halt if(order == 6 && lastorder == 5) { happened++; } @@ -1196,7 +1302,6 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); //i = 0; } - memset(receivedCmd, 0x44, 32); if(cmdsRecvd > 999) { DbpString("1000 commands later..."); @@ -1206,13 +1311,22 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); cmdsRecvd++; } - if(respLen <= 0) continue; - //---------------------------- - //u = 0; - //b = 0x00; - //fdt_indicator = FALSE; + if(respLen > 0) { + //---------------------------- + //u = 0; + //b = 0x00; + //fdt_indicator = FALSE; + EmSendCmd14443aRaw(resp, respLen, receivedCmd[0] == 0x52); + } + + if (tracing) { + LogTrace(receivedCmd,len, 0, Uart.parityBits, TRUE); + if (respdata != NULL) { + LogTrace(respdata,respsize, 0, SwapBits(GetParity(respdata,respsize),respsize), FALSE); + } + } - EmSendCmd14443aRaw(resp, respLen, receivedCmd[0] == 0x52); + memset(receivedCmd, 0x44, RECV_CMD_SIZE); /* // Modulate Manchester FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD); AT91C_BASE_SSC->SSC_THR = 0x00; @@ -2079,7 +2193,7 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) } if (cardSTATE != MFEMUL_NOFIELD) { - res = EmGetCmd(receivedCmd, &len, 100); // (+ nextCycleTimeout) + res = EmGetCmd(receivedCmd, &len, RECV_CMD_SIZE); // (+ nextCycleTimeout) if (res == 2) { cardSTATE = MFEMUL_NOFIELD; LEDsoff();