X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/a1ff338bd5023bac02d51e1de5ca70fbdb90d3bf..5b12974a7f01a94c40552402b66b01bf8ec0e214:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 5d7375a7..23701540 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -42,9 +42,11 @@ #include "apps.h" #include "util.h" #include "string.h" +#include "printf.h" #include "common.h" #include "cmd.h" #include "iso14443a.h" +#include "iso15693.h" // Needed for CRC in emulation mode; // same construction as in ISO 14443; // different initial value (CRC_ICLASS) @@ -391,8 +393,7 @@ static RAMFUNC int ManchesterDecoding(int v) { Demod.shiftReg = 0; Demod.samples = 0; if (Demod.posCount) { - //if (trigger) LED_A_OFF(); // Not useful in this case... - switch(Demod.syncBit) { + switch (Demod.syncBit) { case 0x08: Demod.samples = 3; break; case 0x04: Demod.samples = 2; break; case 0x02: Demod.samples = 1; break; @@ -414,12 +415,13 @@ static RAMFUNC int ManchesterDecoding(int v) { } } else { + // state is DEMOD is in SYNC from here on. modulation = bit & Demod.syncBit; modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit; Demod.samples += 4; - if (Demod.posCount==0) { + if (Demod.posCount == 0) { Demod.posCount = 1; if (modulation) { Demod.sub = SUB_FIRST_HALF; @@ -428,14 +430,6 @@ static RAMFUNC int ManchesterDecoding(int v) { } } else { Demod.posCount = 0; - /*(modulation && (Demod.sub == SUB_FIRST_HALF)) { - if (Demod.state!=DEMOD_ERROR_WAIT) { - Demod.state = DEMOD_ERROR_WAIT; - Demod.output[Demod.len] = 0xaa; - error = 0x01; - } - }*/ - //else if (modulation) { if (modulation) { if (Demod.sub == SUB_FIRST_HALF) { Demod.sub = SUB_BOTH; @@ -447,23 +441,16 @@ static RAMFUNC int ManchesterDecoding(int v) { Demod.output[Demod.len] = 0x0f; Demod.len++; Demod.state = DEMOD_UNSYNCD; -// error = 0x0f; return true; } else { Demod.state = DEMOD_ERROR_WAIT; error = 0x33; } - /*if (Demod.state!=DEMOD_ERROR_WAIT) { - Demod.state = DEMOD_ERROR_WAIT; - Demod.output[Demod.len] = 0xaa; - error = 0x01; - }*/ } switch(Demod.state) { case DEMOD_START_OF_COMMUNICATION: if (Demod.sub == SUB_BOTH) { - //Demod.state = DEMOD_MANCHESTER_D; Demod.state = DEMOD_START_OF_COMMUNICATION2; Demod.posCount = 1; Demod.sub = SUB_NONE; @@ -484,10 +471,7 @@ static RAMFUNC int ManchesterDecoding(int v) { break; case DEMOD_START_OF_COMMUNICATION3: if (Demod.sub == SUB_SECOND_HALF) { -// Demod.state = DEMOD_MANCHESTER_D; Demod.state = DEMOD_SOF_COMPLETE; - //Demod.output[Demod.len] = Demod.syncBit & 0xFF; - //Demod.len++; } else { Demod.output[Demod.len] = 0xab; Demod.state = DEMOD_ERROR_WAIT; @@ -543,16 +527,6 @@ static RAMFUNC int ManchesterDecoding(int v) { break; } - /*if (Demod.bitCount>=9) { - Demod.output[Demod.len] = Demod.shiftReg & 0xff; - Demod.len++; - - Demod.parityBits <<= 1; - Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01); - - Demod.bitCount = 0; - Demod.shiftReg = 0; - }*/ if (Demod.bitCount >= 8) { Demod.shiftReg >>= 1; Demod.output[Demod.len] = (Demod.shiftReg & 0xff); @@ -782,133 +756,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { } } -//----------------------------------------------------------------------------- -// Wait for commands from reader -// Stop when button is pressed -// Or return true when command is captured -//----------------------------------------------------------------------------- -static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen) -{ - // 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. - Uart.output = received; - Uart.byteCntMax = maxLen; - Uart.state = STATE_UNSYNCD; - - for (;;) { - WDT_HIT(); - - if (BUTTON_PRESS()) return false; - - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; - } - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - - if (OutOfNDecoding(b & 0x0f)) { - *len = Uart.byteCnt; - return true; - } - } - } -} - -static uint8_t encode4Bits(const uint8_t b) { - uint8_t c = b & 0xF; - // OTA, the least significant bits first - // The columns are - // 1 - Bit value to send - // 2 - Reversed (big-endian) - // 3 - Encoded - // 4 - Hex values - - switch(c){ - // 1 2 3 4 - case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55 - case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95 - case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65 - case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5 - case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59 - case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99 - case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69 - case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9 - case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56 - case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96 - case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66 - case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6 - case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a - case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a - case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a - default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa - - } -} - -//----------------------------------------------------------------------------- -// Prepare tag messages -//----------------------------------------------------------------------------- -static void CodeIClassTagAnswer(const uint8_t *cmd, int len) { - - /* - * SOF comprises 3 parts; - * * An unmodulated time of 56.64 us - * * 24 pulses of 423.75 kHz (fc/32) - * * A logic 1, which starts with an unmodulated time of 18.88us - * followed by 8 pulses of 423.75kHz (fc/32) - * - * - * EOF comprises 3 parts: - * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated - * time of 18.88us. - * - 24 pulses of fc/32 - * - An unmodulated time of 56.64 us - * - * - * A logic 0 starts with 8 pulses of fc/32 - * followed by an unmodulated time of 256/fc (~18,88us). - * - * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by - * 8 pulses of fc/32 (also 18.88us) - * - * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag, - * works like this. - * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us). - * - A 0-bit input to the FPGA becomes an unmodulated time of 18.88us - * - * In this mode the SOF can be written as 00011101 = 0x1D - * The EOF can be written as 10111000 = 0xb8 - * A logic 1 is 01 - * A logic 0 is 10 - * - * */ - - int i; - - ToSendReset(); - - // Send SOF - ToSend[++ToSendMax] = 0x1D; - - for (i = 0; i < len; i++) { - uint8_t b = cmd[i]; - ToSend[++ToSendMax] = encode4Bits(b & 0xF); // Least significant half - ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF); // Most significant half - } - - // Send EOF - ToSend[++ToSendMax] = 0xB8; - //lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end - // Convert from last byte pos to length - ToSendMax++; -} - -// Only SOF +// Encode SOF only static void CodeIClassTagSOF() { //So far a dummy implementation, not used //int lastProxToAirDuration =0; @@ -926,61 +774,21 @@ static void AppendCrc(uint8_t *data, int len) { ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1); } -static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) { - int i = 0, d = 0;//, u = 0, d = 0; - uint8_t b = 0; - - //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K_8BIT); - - AT91C_BASE_SSC->SSC_THR = 0x00; - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); - while (!BUTTON_PRESS()) { - if ((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){ - b = AT91C_BASE_SSC->SSC_RHR; (void) b; - } - if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){ - b = 0x00; - if (d < delay) { - d++; - } - else { - if (i < respLen) { - b = resp[i]; - //Hack - //b = 0xAC; - } - i++; - } - AT91C_BASE_SSC->SSC_THR = b; - } - -// if (i > respLen +4) break; - if (i > respLen + 1) break; - } - - return 0; -} - - -#define MODE_SIM_CSN 0 -#define MODE_EXIT_AFTER_MAC 1 -#define MODE_FULLSIM 2 /** * @brief Does the actual simulation - * @param csn - csn to use - * @param breakAfterMacReceived if true, returns after reader MAC has been received. */ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { + // free eventually allocated BigBuf memory BigBuf_free_keep_EM(); State cipher_state; -// State cipher_state_reserve; - uint8_t *csn = BigBuf_get_EM_addr(); - uint8_t *emulator = csn; - uint8_t sof_data[] = { 0x0F} ; + + uint8_t *emulator = BigBuf_get_EM_addr(); + uint8_t *csn = emulator; + uint8_t sof_data[] = { 0x0F } ; + // CSN followed by two CRC bytes uint8_t anticoll_data[10] = { 0 }; uint8_t csn_data[10] = { 0 }; @@ -991,21 +799,26 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { rotateCSN(csn_data, anticoll_data); // Compute CRC on both CSNs - ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]); - ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]); + AppendCrc(anticoll_data, 8); + AppendCrc(csn_data, 8); uint8_t diversified_key[8] = { 0 }; // e-Purse - uint8_t card_challenge_data[8] = { 0x00 }; - if (simulationMode == MODE_FULLSIM) { - //The diversified key should be stored on block 3 - //Get the diversified key from emulator memory - memcpy(diversified_key, emulator + (8*3), 8); - //Card challenge, a.k.a e-purse is on block 2 + uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + //uint8_t card_challenge_data[8] = { 0 }; + if (simulationMode == ICLASS_SIM_MODE_FULL) { + // The diversified key should be stored on block 3 + // Get the diversified key from emulator memory + memcpy(diversified_key, emulator + (8 * 3), 8); + // Card challenge, a.k.a e-purse is on block 2 memcpy(card_challenge_data, emulator + (8 * 2), 8); - //Precalculate the cipher state, feeding it the CC + // Precalculate the cipher state, feeding it the CC cipher_state = opt_doTagMAC_1(card_challenge_data, diversified_key); } + // save card challenge for sim2,4 attack + if (reader_mac_buf != NULL) { + memcpy(reader_mac_buf, card_challenge_data, 8); + } int exitLoop = 0; // Reader 0a @@ -1026,234 +839,317 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // Anticollision CSN (rotated CSN) // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) - uint8_t *resp_anticoll = BigBuf_malloc(28); + uint8_t *resp_anticoll = BigBuf_malloc(22); int resp_anticoll_len; - // CSN + // CSN (block 0) // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) - uint8_t *resp_csn = BigBuf_malloc(30); + uint8_t *resp_csn = BigBuf_malloc(22); int resp_csn_len; - // e-Purse + // configuration (block 1) picopass 2ks + uint8_t *resp_conf = BigBuf_malloc(22); + int resp_conf_len; + uint8_t conf_data[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; + AppendCrc(conf_data, 8); + + // e-Purse (block 2) // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) - uint8_t *resp_cc = BigBuf_malloc(20); + uint8_t *resp_cc = BigBuf_malloc(18); int resp_cc_len; + // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only + uint8_t *resp_ff = BigBuf_malloc(22); + int resp_ff_len; + uint8_t ff_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00}; + AppendCrc(ff_data, 8); + + // Application Issuer Area (block 5) + uint8_t *resp_aia = BigBuf_malloc(22); + int resp_aia_len; + uint8_t aia_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00}; + AppendCrc(aia_data, 8); + uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); int len; // Prepare card messages ToSendMax = 0; - // First card answer: SOF + // First card answer: SOF only CodeIClassTagSOF(); memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax; // Anticollision CSN - CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data)); + CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data)); memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax; - // CSN - CodeIClassTagAnswer(csn_data, sizeof(csn_data)); + // CSN (block 0) + CodeIso15693AsTag(csn_data, sizeof(csn_data)); memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax; - // e-Purse - CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data)); - memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax; + // Configuration (block 1) + CodeIso15693AsTag(conf_data, sizeof(conf_data)); + memcpy(resp_conf, ToSend, ToSendMax); + resp_conf_len = ToSendMax; - //This is used for responding to READ-block commands or other data which is dynamically generated - //First the 'trace'-data, not encoded for FPGA - uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer - //Then storage for the modulated data - //Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes) - uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2); + // e-Purse (block 2) + CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); + memcpy(resp_cc, ToSend, ToSendMax); + resp_cc_len = ToSendMax; - // Start from off (no field generated) - //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - //SpinDelay(200); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - SpinDelay(100); - StartCountSspClk(); - // We need to listen to the high-frequency, peak-detected path. - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); + // Kd, Kc (blocks 3 and 4) + CodeIso15693AsTag(ff_data, sizeof(ff_data)); + memcpy(resp_ff, ToSend, ToSendMax); + resp_ff_len = ToSendMax; - // To control where we are in the protocol - int cmdsRecvd = 0; - uint32_t time_0 = GetCountSspClk(); - uint32_t t2r_time =0; - uint32_t r2t_time =0; + // Application Issuer Area (block 5) + CodeIso15693AsTag(aia_data, sizeof(aia_data)); + memcpy(resp_aia, ToSend, ToSendMax); + resp_aia_len = ToSendMax; + + //This is used for responding to READ-block commands or other data which is dynamically generated + uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer + uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2); LED_A_ON(); bool buttonPressed = false; - uint8_t response_delay = 1; + enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE; + while (!exitLoop) { - response_delay = 1; + WDT_HIT(); LED_B_OFF(); //Signal tracer // Can be used to get a trigger for an oscilloscope.. LED_C_OFF(); - if (!GetIClassCommandFromReader(receivedCmd, &len, 100)) { + uint32_t reader_eof_time = 0; + len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time); + if (len < 0) { buttonPressed = true; break; } - r2t_time = GetCountSspClk(); + //Signal tracer LED_C_ON(); - // Okay, look at the command now. - if (receivedCmd[0] == ICLASS_CMD_ACTALL) { - // Reader in anticollission phase - modulated_response = resp_sof; - modulated_response_size = resp_sof_Len; //order = 1; - trace_data = sof_data; - trace_data_size = sizeof(sof_data); - } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { - // Reader asks for anticollission CSN - modulated_response = resp_anticoll; - modulated_response_size = resp_anticoll_len; //order = 2; - trace_data = anticoll_data; - trace_data_size = sizeof(anticoll_data); - //DbpString("Reader requests anticollission CSN:"); - } else if (receivedCmd[0] == ICLASS_CMD_SELECT) { - // Reader selects anticollission CSN. + // Now look at the reader command and provide appropriate responses + // default is no response: + modulated_response = NULL; + modulated_response_size = 0; + trace_data = NULL; + trace_data_size = 0; + + if (receivedCmd[0] == ICLASS_CMD_ACTALL && len == 1) { + // Reader in anticollision phase + if (chip_state != HALTED) { + modulated_response = resp_sof; + modulated_response_size = resp_sof_Len; + trace_data = sof_data; + trace_data_size = sizeof(sof_data); + chip_state = ACTIVATED; + } + + } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify + // Reader asks for anticollision CSN + if (chip_state == SELECTED || chip_state == ACTIVATED) { + modulated_response = resp_anticoll; + modulated_response_size = resp_anticoll_len; + trace_data = anticoll_data; + trace_data_size = sizeof(anticoll_data); + } + + } else if (receivedCmd[0] == ICLASS_CMD_SELECT && len == 9) { + // Reader selects anticollision CSN. // Tag sends the corresponding real CSN - modulated_response = resp_csn; - modulated_response_size = resp_csn_len; //order = 3; - trace_data = csn_data; - trace_data_size = sizeof(csn_data); - //DbpString("Reader selects anticollission CSN:"); - } else if (receivedCmd[0] == ICLASS_CMD_READCHECK_KD) { - // Read e-purse (88 02) - modulated_response = resp_cc; - modulated_response_size = resp_cc_len; //order = 4; - trace_data = card_challenge_data; - trace_data_size = sizeof(card_challenge_data); - LED_B_ON(); - } else if (receivedCmd[0] == ICLASS_CMD_CHECK) { + if (chip_state == ACTIVATED || chip_state == SELECTED) { + if (!memcmp(receivedCmd+1, anticoll_data, 8)) { + modulated_response = resp_csn; + modulated_response_size = resp_csn_len; + trace_data = csn_data; + trace_data_size = sizeof(csn_data); + chip_state = SELECTED; + } else { + chip_state = IDLE; + } + } else if (chip_state == HALTED) { + // RESELECT with CSN + if (!memcmp(receivedCmd+1, csn_data, 8)) { + modulated_response = resp_csn; + modulated_response_size = resp_csn_len; + trace_data = csn_data; + trace_data_size = sizeof(csn_data); + chip_state = SELECTED; + } + } + + } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block + uint16_t blockNo = receivedCmd[1]; + if (chip_state == SELECTED) { + if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { + // provide defaults for blocks 0 ... 5 + switch (blockNo) { + case 0: // csn (block 00) + modulated_response = resp_csn; + modulated_response_size = resp_csn_len; + trace_data = csn_data; + trace_data_size = sizeof(csn_data); + break; + case 1: // configuration (block 01) + modulated_response = resp_conf; + modulated_response_size = resp_conf_len; + trace_data = conf_data; + trace_data_size = sizeof(conf_data); + break; + case 2: // e-purse (block 02) + modulated_response = resp_cc; + modulated_response_size = resp_cc_len; + trace_data = card_challenge_data; + trace_data_size = sizeof(card_challenge_data); + // set epurse of sim2,4 attack + if (reader_mac_buf != NULL) { + memcpy(reader_mac_buf, card_challenge_data, 8); + } + break; + case 3: + case 4: // Kd, Kc, always respond with 0xff bytes + modulated_response = resp_ff; + modulated_response_size = resp_ff_len; + trace_data = ff_data; + trace_data_size = sizeof(ff_data); + break; + case 5: // Application Issuer Area (block 05) + modulated_response = resp_aia; + modulated_response_size = resp_aia_len; + trace_data = aia_data; + trace_data_size = sizeof(aia_data); + break; + // default: don't respond + } + } else if (simulationMode == ICLASS_SIM_MODE_FULL) { + if (blockNo == 3 || blockNo == 4) { // Kd, Kc, always respond with 0xff bytes + modulated_response = resp_ff; + modulated_response_size = resp_ff_len; + trace_data = ff_data; + trace_data_size = sizeof(ff_data); + } else { // use data from emulator memory + memcpy(data_generic_trace, emulator + 8*blockNo, 8); + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } + } + } + + } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD + || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && len == 2) { + // Read e-purse (88 02 || 18 02) + if (chip_state == SELECTED) { + modulated_response = resp_cc; + modulated_response_size = resp_cc_len; + trace_data = card_challenge_data; + trace_data_size = sizeof(card_challenge_data); + LED_B_ON(); + } + + } else if (receivedCmd[0] == ICLASS_CMD_CHECK && len == 9) { // Reader random and reader MAC!!! - if (simulationMode == MODE_FULLSIM) { - //NR, from reader, is in receivedCmd +1 - opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key); + if (chip_state == SELECTED) { + if (simulationMode == ICLASS_SIM_MODE_FULL) { + //NR, from reader, is in receivedCmd+1 + opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key); + trace_data = data_generic_trace; + trace_data_size = 4; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + //exitLoop = true; + } else { // Not fullsim, we don't respond + // We do not know what to answer, so lets keep quiet + if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { + if (reader_mac_buf != NULL) { + // save NR and MAC for sim 2,4 + memcpy(reader_mac_buf + 8, receivedCmd + 1, 8); + } + exitLoop = true; + } + } + } + + } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { + if (chip_state == SELECTED) { + // Reader ends the session + chip_state = HALTED; + } + } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06 + //Read 4 blocks + if (chip_state == SELECTED) { + memcpy(data_generic_trace, emulator + (receivedCmd[1] << 3), 8 * 4); + AppendCrc(data_generic_trace, 8 * 4); trace_data = data_generic_trace; - trace_data_size = 4; - CodeIClassTagAnswer(trace_data, trace_data_size); + trace_data_size = 8 * 4 + 2; + CodeIso15693AsTag(trace_data, trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; - response_delay = 0; //We need to hurry here... (but maybe not too much... ??) - //exitLoop = true; - } else { //Not fullsim, we don't respond - // We do not know what to answer, so lets keep quiet - modulated_response = resp_sof; - modulated_response_size = 0; - trace_data = NULL; - trace_data_size = 0; - if (simulationMode == MODE_EXIT_AFTER_MAC) { - // dbprintf:ing ... - Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x" - ,csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]); - Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len, - receivedCmd[0], receivedCmd[1], receivedCmd[2], - receivedCmd[3], receivedCmd[4], receivedCmd[5], - receivedCmd[6], receivedCmd[7], receivedCmd[8]); - if (reader_mac_buf != NULL) { - memcpy(reader_mac_buf, receivedCmd+1, 8); - } - exitLoop = true; - } } - } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { - // Reader ends the session - modulated_response = resp_sof; - modulated_response_size = 0; //order = 0; - trace_data = NULL; - trace_data_size = 0; - } else if (simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { - //Read block - uint16_t blk = receivedCmd[1]; - //Take the data... - memcpy(data_generic_trace, emulator + (blk << 3), 8); - //Add crc - AppendCrc(data_generic_trace, 8); - trace_data = data_generic_trace; - trace_data_size = 10; - CodeIClassTagAnswer(trace_data, trace_data_size); - memcpy(data_response, ToSend, ToSendMax); - modulated_response = data_response; - modulated_response_size = ToSendMax; - } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == MODE_FULLSIM) { - //Probably the reader wants to update the nonce. Let's just ignore that for now. + } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) { + // Probably the reader wants to update the nonce. Let's just ignore that for now. // OBS! If this is implemented, don't forget to regenerate the cipher_state - //We're expected to respond with the data+crc, exactly what's already in the receivedcmd - //receivedcmd is now UPDATE 1b | ADDRESS 1b| DATA 8b| Signature 4b or CRC 2b| - - //Take the data... - memcpy(data_generic_trace, receivedCmd+2, 8); - //Add crc - AppendCrc(data_generic_trace, 8); - trace_data = data_generic_trace; - trace_data_size = 10; - CodeIClassTagAnswer(trace_data, trace_data_size); - memcpy(data_response, ToSend, ToSendMax); - modulated_response = data_response; - modulated_response_size = ToSendMax; - } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL) { - //Pagesel - //Pagesel enables to select a page in the selected chip memory and return its configuration block - //Chips with a single page will not answer to this command - // It appears we're fine ignoring this. - //Otherwise, we should answer 8bytes (block) + 2bytes CRC + // We're expected to respond with the data+crc, exactly what's already in the receivedCmd + // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b + if (chip_state == SELECTED) { + memcpy(data_generic_trace, receivedCmd + 2, 8); + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } + + } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) { + // Pagesel + if (chip_state == SELECTED) { + // Pagesel enables to select a page in the selected chip memory and return its configuration block + // Chips with a single page will not answer to this command + // It appears we're fine ignoring this. + // Otherwise, we should answer 8bytes (block) + 2bytes CRC + } + } else { - //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44 - // 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]); + // don't know how to handle this command + char debug_message[250]; // should be enough + sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len); + for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) { + sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]); + } + Dbprintf("%s", debug_message); // Do not respond - modulated_response = resp_sof; - modulated_response_size = 0; //order = 0; - trace_data = NULL; - trace_data_size = 0; } - if (cmdsRecvd > 100) { - //DbpString("100 commands later..."); - //break; - } else { - cmdsRecvd++; - } /** - A legit tag has about 380us delay between reader EOT and tag SOF. + A legit tag has about 311,5us delay between reader EOT and tag SOF. **/ if (modulated_response_size > 0) { - SendIClassAnswer(modulated_response, modulated_response_size, response_delay); - t2r_time = GetCountSspClk(); + uint32_t response_time = reader_eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM - DELAY_ARM_TO_READER_SIM; + TransmitTo15693Reader(modulated_response, modulated_response_size, response_time, false); + LogTrace(trace_data, trace_data_size, response_time + DELAY_ARM_TO_READER_SIM, response_time + (modulated_response_size << 6) + DELAY_ARM_TO_READER_SIM, NULL, false); } - uint8_t parity[MAX_PARITY_SIZE]; - GetParity(receivedCmd, len, parity); - LogTrace(receivedCmd, len, (r2t_time-time_0) << 4, (r2t_time-time_0) << 4, parity, true); - - if (trace_data != NULL) { - GetParity(trace_data, trace_data_size, parity); - LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, false); - } - if (!get_tracing()) { - DbpString("Trace full"); - //break; - } } - //Dbprintf("%x", cmdsRecvd); LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); @@ -1280,7 +1176,13 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) { uint32_t simType = arg0; uint32_t numberOfCSNS = arg1; + + // setup hardware for simulation: FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); + StartCountSspClk(); // Enable and clear the trace set_tracing(true); @@ -1288,35 +1190,42 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain //Use the emulator memory for SIM uint8_t *emulator = BigBuf_get_EM_addr(); - if (simType == 0) { + if (simType == ICLASS_SIM_MODE_CSN) { // Use the CSN from commandline memcpy(emulator, datain, 8); - doIClassSimulation(MODE_SIM_CSN,NULL); - } else if (simType == 1) { + doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL); + } else if (simType == ICLASS_SIM_MODE_CSN_DEFAULT) { //Default CSN uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 }; // Use the CSN from commandline memcpy(emulator, csn_crc, 8); - doIClassSimulation(MODE_SIM_CSN,NULL); - } else if (simType == 2) { + doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL); + } else if (simType == ICLASS_SIM_MODE_READER_ATTACK) { uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 }; Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS); // In this mode, a number of csns are within datain. We'll simulate each one, one at a time - // in order to collect MAC's from the reader. This can later be used in an offlne-attack + // in order to collect MAC's from the reader. This can later be used in an offline-attack // in order to obtain the keys, as in the "dismantling iclass"-paper. - int i = 0; - for ( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++) { - // The usb data is 512 bytes, fitting 65 8-byte CSNs in there. + int i; + for (i = 0; i < numberOfCSNS && i*16+16 <= USB_CMD_DATA_SIZE; i++) { + // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response). memcpy(emulator, datain+(i*8), 8); - if (doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8)) { - cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8); - return; // Button pressed + if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC, mac_responses+i*16)) { + // Button pressed + break; } + Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x", + datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3], + datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]); + Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x", + mac_responses[i*16+ 8], mac_responses[i*16+ 9], mac_responses[i*16+10], mac_responses[i*16+11], + mac_responses[i*16+12], mac_responses[i*16+13], mac_responses[i*16+14], mac_responses[i*16+15]); + SpinDelay(100); // give the reader some time to prepare for next CSN } - cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8); - } else if (simType == 3) { + cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16); + } else if (simType == ICLASS_SIM_MODE_FULL) { //This is 'full sim' mode, where we use the emulator storage for data. - doIClassSimulation(MODE_FULLSIM, NULL); + doIClassSimulation(ICLASS_SIM_MODE_FULL, NULL); } else { // We may want a mode here where we hardcode the csns to use (from proxclone). // That will speed things up a little, but not required just yet. @@ -1479,10 +1388,10 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, if (elapsed) (*elapsed)++; } if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - if (c < timeout) { - c++; - } else { - return false; + if (c < timeout) { + c++; + } else { + return false; } b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; skip = !skip; @@ -1683,10 +1592,10 @@ void ReaderIClass(uint8_t arg0) { // 0 : CSN // 1 : Configuration // 2 : e-purse - // (3,4 write-only, kc and kd) - // 5 Application issuer area - // - //Then we can 'ship' back the 8 * 6 bytes of data, + // 3 : kd / debit / aa2 (write-only) + // 4 : kc / credit / aa1 (write-only) + // 5 : AIA, Application issuer area + //Then we can 'ship' back the 6 * 8 bytes of data, // with 0xFF:s in block 3 and 4. LED_B_ON();