X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/17c60b1248713836ecf4e7e9ce2639a05a7e1d35..67b7d6fa31f4426f18d223faa06c7b1f3c59fa97:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 41c9b8b5..97c62bb6 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -47,6 +47,8 @@ // different initial value (CRC_ICLASS) #include "iso14443crc.h" #include "iso15693tools.h" +#include "protocols.h" +#include "optimized_cipher.h" static int timeout = 4096; @@ -965,8 +967,11 @@ static void CodeIClassTagSOF() // Convert from last byte pos to length ToSendMax++; } +#define MODE_SIM_CSN 0 +#define MODE_EXIT_AFTER_MAC 1 +#define MODE_FULLSIM 2 -int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf); +int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf); /** * @brief SimulateIClass simulates an iClass card. * @param arg0 type of simulation @@ -988,15 +993,20 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain // Enable and clear the trace set_tracing(TRUE); clear_trace(); + //Use the emulator memory for SIM + uint8_t *emulator = BigBuf_get_EM_addr(); - uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 }; if(simType == 0) { // Use the CSN from commandline - memcpy(csn_crc, datain, 8); - doIClassSimulation(csn_crc,0,NULL); + memcpy(emulator, datain, 8); + doIClassSimulation(MODE_SIM_CSN,NULL); }else if(simType == 1) { - doIClassSimulation(csn_crc,0,NULL); + //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) { @@ -1011,8 +1021,8 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain { // The usb data is 512 bytes, fitting 65 8-byte CSNs in there. - memcpy(csn_crc, datain+(i*8), 8); - if(doIClassSimulation(csn_crc,1,mac_responses+i*8)) + 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 @@ -1020,6 +1030,9 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain } cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8); + }else if(simType == 3){ + //This is 'full sim' mode, where we use the emulator storage for data. + doIClassSimulation(MODE_FULLSIM, NULL); } else{ // We may want a mode here where we hardcode the csns to use (from proxclone). @@ -1029,29 +1042,54 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain Dbprintf("Done..."); } +void AppendCrc(uint8_t* data, int len) +{ + ComputeCrc14443(CRC_ICLASS,data,len,data+len,data+len+1); +} + /** * @brief Does the actual simulation * @param csn - csn to use * @param breakAfterMacReceived if true, returns after reader MAC has been received. */ -int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf) +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} ; // CSN followed by two CRC bytes - uint8_t response1[] = { 0x0F} ; - uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0}; - memcpy(response3,csn,sizeof(response3)); + uint8_t anticoll_data[10] = { 0 }; + uint8_t csn_data[10] = { 0 }; + memcpy(csn_data,csn,sizeof(csn_data)); Dbprintf("Simulating 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]); - // e-Purse - uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // Construct anticollision-CSN - rotateCSN(response3,response2); + rotateCSN(csn_data,anticoll_data); // Compute CRC on both CSNs - ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]); - ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]); + ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]); + ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]); + + 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 + memcpy(card_challenge_data,emulator + (8 * 2) , 8); + //Precalculate the cipher state, feeding it the CC + cipher_state = opt_doTagMAC_1(card_challenge_data,diversified_key); + + } int exitLoop = 0; // Reader 0a @@ -1062,34 +1100,31 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader // Tag CSN uint8_t *modulated_response; - int modulated_response_size; + int modulated_response_size = 0; uint8_t* trace_data = NULL; int trace_data_size = 0; - //uint8_t sof = 0x0f; - // free eventually allocated BigBuf memory - BigBuf_free(); + // Respond SOF -- takes 1 bytes - uint8_t *resp1 = BigBuf_malloc(2); - int resp1Len; + uint8_t *resp_sof = BigBuf_malloc(2); + int resp_sof_Len; // Anticollision CSN (rotated CSN) // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) - uint8_t *resp2 = BigBuf_malloc(28); - int resp2Len; + uint8_t *resp_anticoll = BigBuf_malloc(28); + int resp_anticoll_len; // CSN // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) - uint8_t *resp3 = BigBuf_malloc(30); - int resp3Len; + uint8_t *resp_csn = BigBuf_malloc(30); + int resp_csn_len; // e-Purse // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) - uint8_t *resp4 = BigBuf_malloc(20); - int resp4Len; + uint8_t *resp_cc = BigBuf_malloc(20); + int resp_cc_len; uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); - memset(receivedCmd, 0x44, MAX_FRAME_SIZE); int len; // Prepare card messages @@ -1097,20 +1132,26 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader // First card answer: SOF CodeIClassTagSOF(); - memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax; + memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax; // Anticollision CSN - CodeIClassTagAnswer(response2, sizeof(response2)); - memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax; + CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data)); + memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax; // CSN - CodeIClassTagAnswer(response3, sizeof(response3)); - memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax; + CodeIClassTagAnswer(csn_data, sizeof(csn_data)); + memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax; // e-Purse - CodeIClassTagAnswer(response4, sizeof(response4)); - memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax; + CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data)); + memcpy(resp_cc, ToSend, ToSendMax); resp_cc_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); // Start from off (no field generated) //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); @@ -1130,9 +1171,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader LED_A_ON(); bool buttonPressed = false; - + uint8_t response_delay = 1; while(!exitLoop) { - + response_delay = 1; LED_B_OFF(); //Signal tracer // Can be used to get a trigger for an oscilloscope.. @@ -1147,57 +1188,110 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader LED_C_ON(); // Okay, look at the command now. - if(receivedCmd[0] == 0x0a ) { + if(receivedCmd[0] == ICLASS_CMD_ACTALL ) { // Reader in anticollission phase - modulated_response = resp1; modulated_response_size = resp1Len; //order = 1; - trace_data = response1; - trace_data_size = sizeof(response1); - } else if(receivedCmd[0] == 0x0c) { + 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 = resp2; modulated_response_size = resp2Len; //order = 2; - trace_data = response2; - trace_data_size = sizeof(response2); + 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] == 0x81) { + } else if(receivedCmd[0] == ICLASS_CMD_SELECT) { // Reader selects anticollission CSN. // Tag sends the corresponding real CSN - modulated_response = resp3; modulated_response_size = resp3Len; //order = 3; - trace_data = response3; - trace_data_size = sizeof(response3); + 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] == 0x88) { + } else if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD) { // Read e-purse (88 02) - modulated_response = resp4; modulated_response_size = resp4Len; //order = 4; - trace_data = response4; - trace_data_size = sizeof(response4); + 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] == 0x05) { + } else if(receivedCmd[0] == ICLASS_CMD_CHECK) { // Reader random and reader MAC!!! - // Do not respond - // We do not know what to answer, so lets keep quiet - modulated_response = resp1; modulated_response_size = 0; //order = 5; - trace_data = NULL; - trace_data_size = 0; - if (breakAfterMacReceived){ - // 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); + if(simulationMode == MODE_FULLSIM) + { + //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; + CodeIClassTagAnswer(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... + //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; } - exitLoop = true; } - } else if(receivedCmd[0] == 0x00 && len == 1) { + + } else if(receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { // Reader ends the session - modulated_response = resp1; modulated_response_size = 0; //order = 0; + modulated_response = resp_sof; modulated_response_size = 0; //order = 0; trace_data = NULL; trace_data_size = 0; - } else { + } 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. + // 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 + } + 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", @@ -1206,7 +1300,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader receivedCmd[3], receivedCmd[4], receivedCmd[5], receivedCmd[6], receivedCmd[7], receivedCmd[8]); // Do not respond - modulated_response = resp1; modulated_response_size = 0; //order = 0; + modulated_response = resp_sof; modulated_response_size = 0; //order = 0; trace_data = NULL; trace_data_size = 0; } @@ -1222,7 +1316,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader A legit tag has about 380us delay between reader EOT and tag SOF. **/ if(modulated_response_size > 0) { - SendIClassAnswer(modulated_response, modulated_response_size, 1); + SendIClassAnswer(modulated_response, modulated_response_size, response_delay); t2r_time = GetCountSspClk(); } @@ -1241,7 +1335,6 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader } } - memset(receivedCmd, 0x44, MAX_FRAME_SIZE); } //Dbprintf("%x", cmdsRecvd); @@ -1532,7 +1625,10 @@ uint8_t handshakeIclassTag(uint8_t *card_data) static uint8_t act_all[] = { 0x0a }; static uint8_t identify[] = { 0x0c }; static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - static uint8_t readcheck_cc[]= { 0x88, 0x02 }; + + + static uint8_t readcheck_cc[]= { 0x88, 0x02,}; + uint8_t resp[ICLASS_BUFFER_SIZE]; uint8_t read_status = 0; @@ -1567,30 +1663,38 @@ uint8_t handshakeIclassTag(uint8_t *card_data) if(ReaderReceiveIClass(resp) == 8) { //Save CC (e-purse) in response data memcpy(card_data+8,resp,8); - - //Got both - read_status = 2; + read_status++; } return read_status; } + // Reader iClass Anticollission void ReaderIClass(uint8_t arg0) { - uint8_t card_data[24]={0}; - uint8_t last_csn[8]={0}; + uint8_t card_data[6 * 8]={0}; + memset(card_data, 0xFF, sizeof(card_data)); + uint8_t last_csn[8]={0}; - int read_status= 0; - bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; - bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC; - set_tracing(TRUE); - setupIclassReader(); + //Read conf block CRC(0x01) => 0xfa 0x22 + uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x01, 0xfa, 0x22}; + //Read conf block CRC(0x05) => 0xde 0x64 + uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x05, 0xde, 0x64}; - size_t datasize = 0; - while(!BUTTON_PRESS()) - { + int read_status= 0; + uint8_t result_status = 0; + bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; + bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY; + set_tracing(TRUE); + setupIclassReader(); + + uint16_t tryCnt=0; + while(!BUTTON_PRESS()) + { + if (try_once && tryCnt > 5) break; + tryCnt++; if(!tracing) { DbpString("Trace full"); break; @@ -1600,17 +1704,53 @@ void ReaderIClass(uint8_t arg0) { read_status = handshakeIclassTag(card_data); if(read_status == 0) continue; - if(read_status == 1) datasize = 8; - if(read_status == 2) datasize = 16; + if(read_status == 1) result_status = FLAG_ICLASS_READER_CSN; + if(read_status == 2) result_status = FLAG_ICLASS_READER_CSN|FLAG_ICLASS_READER_CC; + + // handshakeIclass returns CSN|CC, but the actual block + // layout is CSN|CONFIG|CC, so here we reorder the data, + // moving CC forward 8 bytes + memcpy(card_data+16,card_data+8, 8); + //Read block 1, config + if(arg0 & FLAG_ICLASS_READER_CONF) + { + if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf),card_data+8, 10, 10)) + { + Dbprintf("Failed to dump config block"); + }else + { + result_status |= FLAG_ICLASS_READER_CONF; + } + } + + //Read block 5, AA + if(arg0 & FLAG_ICLASS_READER_AA){ + if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA),card_data+(8*4), 10, 10)) + { +// Dbprintf("Failed to dump AA block"); + }else + { + result_status |= FLAG_ICLASS_READER_AA; + } + } + + // 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 * 5 bytes of data, + // with 0xFF:s in block 3 and 4. LED_B_ON(); //Send back to client, but don't bother if we already sent this if(memcmp(last_csn, card_data, 8) != 0) { - - if(!get_cc || (get_cc && read_status == 2)) + // If caller requires that we get CC, continue until we got it + if( (arg0 & read_status & FLAG_ICLASS_READER_CC) || !(arg0 & FLAG_ICLASS_READER_CC)) { - cmd_send(CMD_ACK,read_status,0,0,card_data,datasize); + cmd_send(CMD_ACK,result_status,0,0,card_data,sizeof(card_data)); if(abort_after_read) { LED_A_OFF(); return; @@ -1618,10 +1758,10 @@ void ReaderIClass(uint8_t arg0) { //Save that we already sent this.... memcpy(last_csn, card_data, 8); } - //If 'get_cc' was specified and we didn't get a CC, we'll just keep trying... + } LED_B_OFF(); - } + } cmd_send(CMD_ACK,0,0,0,card_data, 0); LED_A_OFF(); } @@ -1704,7 +1844,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { //Set card_data to all zeroes, we'll fill it with data memset(card_data,0x0,USB_CMD_DATA_SIZE); uint8_t failedRead =0; - uint8_t stored_data_length =0; + uint32_t stored_data_length =0; //then loop around remaining blocks for(int block=0; block < cardsize; block++){ @@ -1723,7 +1863,6 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { //Fill up the buffer memcpy(card_data+stored_data_length,resp,8); stored_data_length += 8; - if(stored_data_length +8 > USB_CMD_DATA_SIZE) {//Time to send this off and start afresh cmd_send(CMD_ACK, @@ -1742,6 +1881,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { Dbprintf("Failed to dump block %d", block); } } + //Send off any remaining data if(stored_data_length > 0) {