X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ae60ceca92b802fc980a883cb280d1c57b7932cf..8efd0b80f2d11946b2fc0911cde939f9f93eb40f:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index d8f68c78..0e42fb06 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -59,6 +59,13 @@ static int timeout = 4096; +// iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after +// the reader command. This is measured from end of reader EOF to first modulation of the tag's SOF which starts with a 56,64us unmodulated period. +// 330us = 140 ssp_clk cycles @ 423,75kHz when simulating. +// 56,64us = 24 ssp_clk_cycles +#define DELAY_ICLASS_VCD_TO_VICC_SIM 140 +#define TAG_SOF_UNMODULATED 24 + //----------------------------------------------------------------------------- // The software UART that receives commands from the reader, and its state // variables. @@ -783,7 +790,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { State cipher_state_KC[8]; State cipher_state_KD[8]; State *cipher_state = &cipher_state_KD[0]; - + uint8_t *emulator = BigBuf_get_EM_addr(); uint8_t *csn = emulator; @@ -800,13 +807,12 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { AppendCrc(anticoll_data, 8); AppendCrc(csn_data, 8); - uint8_t diversified_key_d[8]; - uint8_t diversified_key_c[8]; + uint8_t diversified_key_d[8] = { 0x00 }; + uint8_t diversified_key_c[8] = { 0x00 }; uint8_t *diversified_key = diversified_key_d; - + // configuration block uint8_t conf_block[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; - AppendCrc(conf_block, 8); // e-Purse uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; @@ -819,6 +825,8 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { memcpy(diversified_key_c, emulator + 8 * 4, 8); // Kc } + AppendCrc(conf_block, 8); + // save card challenge for sim2,4 attack if (reader_mac_buf != NULL) { memcpy(reader_mac_buf, card_challenge_data, 8); @@ -836,7 +844,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // chip memory may be divided in 8 pages uint8_t max_page = conf_block[4] & 0x10 ? 0 : 7; - + // Precalculate the cipher states, feeding it the CC cipher_state_KD[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); cipher_state_KC[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); @@ -849,7 +857,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { cipher_state_KC[i] = opt_doTagMAC_1(epurse, Kc); } } - + int exitLoop = 0; // Reader 0a // Tag 0f @@ -1073,7 +1081,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { cipher_state = &cipher_state_KD[current_page]; diversified_key = diversified_key_d; } else { - cipher_state = &cipher_state_KC[current_page]; + cipher_state = &cipher_state_KC[current_page]; diversified_key = diversified_key_c; } modulated_response = resp_cc; @@ -1082,7 +1090,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { trace_data_size = sizeof(card_challenge_data); } - } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC + } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) { // Reader random and reader MAC!!! if (chip_state == SELECTED) { @@ -1148,22 +1156,22 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (blockNo == 3) { // update Kd for (int i = 0; i < 8; i++) { if (personalization_mode) { - diversified_key_d[i] = receivedCmd[2 + i]; + diversified_key_d[i] = receivedCmd[2 + i]; } else { diversified_key_d[i] ^= receivedCmd[2 + i]; - } + } } - cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); if (simulationMode == ICLASS_SIM_MODE_FULL) { memcpy(emulator + current_page*page_size + 8*3, diversified_key_d, 8); } - } else if (blockNo == 4) { // update Kc + } else if (blockNo == 4) { // update Kc for (int i = 0; i < 8; i++) { if (personalization_mode) { - diversified_key_c[i] = receivedCmd[2 + i]; + diversified_key_c[i] = receivedCmd[2 + i]; } else { diversified_key_c[i] ^= receivedCmd[2 + i]; - } + } } cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); if (simulationMode == ICLASS_SIM_MODE_FULL) { @@ -1171,7 +1179,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block memcpy(emulator + current_page*page_size + 8*blockNo, receivedCmd+2, 8); - } + } memcpy(data_generic_trace, receivedCmd + 2, 8); AppendCrc(data_generic_trace, 8); trace_data = data_generic_trace; @@ -1185,20 +1193,20 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) { // Pagesel // Chips with a single page will not answer to this command - // Otherwise, we should answer 8bytes (block) + 2bytes CRC + // Otherwise, we should answer 8bytes (conf block 1) + 2bytes CRC if (chip_state == SELECTED) { if (simulationMode == ICLASS_SIM_MODE_FULL && max_page > 0) { current_page = receivedCmd[1]; memcpy(data_generic_trace, emulator + current_page*page_size + 8*1, 8); memcpy(diversified_key_d, emulator + current_page*page_size + 8*3, 8); - memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8); + memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8); cipher_state = &cipher_state_KD[current_page]; personalization_mode = data_generic_trace[7] & 0x80; 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); + memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; } @@ -1219,11 +1227,11 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } /** - A legit tag has about 311,5us delay between reader EOT and tag SOF. + A legit tag has about 273,4us delay between reader EOT and tag SOF. **/ if (modulated_response_size > 0) { - 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); + uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM - TAG_SOF_UNMODULATED - DELAY_ARM_TO_READER_SIM; + TransmitTo15693Reader(modulated_response, modulated_response_size, &response_time, 0, 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); } @@ -1249,9 +1257,9 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { * @param datain */ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) { - + LED_A_ON(); - + uint32_t simType = arg0; uint32_t numberOfCSNS = arg1; @@ -1559,6 +1567,7 @@ static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { ReaderTransmitIClass(act_all, 1); // Card present? if (!ReaderReceiveIClass(resp)) return read_status;//Fail + //Send Identify ReaderTransmitIClass(identify, 1); //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC