X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/015e3b8170cecf0da45c62e830d2671ef74ebcdc..bd09006a8c21bea8d185018aff73c0214d15dcc7:/client/cmdlfem4x.c?ds=sidebyside diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 6cb76fee..ad35d904 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -8,21 +8,17 @@ // Low frequency EM4x commands //----------------------------------------------------------------------------- -#include -#include -#include #include "cmdlfem4x.h" -char *global_em410xId; +uint64_t g_em410xid = 0; static int CmdHelp(const char *Cmd); int CmdEMdemodASK(const char *Cmd) { char cmdp = param_getchar(Cmd, 0); - int findone = (cmdp == '1') ? 1 : 0; - UsbCommand c={CMD_EM410X_DEMOD}; - c.arg[0]=findone; + uint8_t findone = (cmdp == '1') ? 1 : 0; + UsbCommand c = {CMD_EM410X_DEMOD, {findone, 0, 0}}; SendCommand(&c); return 0; } @@ -47,14 +43,25 @@ int CmdEM410xRead(const char *Cmd) PrintAndLog ("EM410x XL pattern found"); return 0; } - char id[12] = {0x00}; - //sprintf(id, "%010llx",lo); - sprintf(id, "%010"PRIu64, lo); - - global_em410xId = id; + g_em410xid = lo; return 1; } + +int usage_lf_em410x_sim(void) { + PrintAndLog("Simulating EM410x tag"); + PrintAndLog(""); + PrintAndLog("Usage: lf em4x em410xsim [h] "); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" uid - uid (10 HEX symbols)"); + PrintAndLog(" clock - clock (32|64) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em4x em410xsim 0F0368568B"); + PrintAndLog(" lf em4x em410xsim 0F0368568B 32"); + return 0; +} + // emulate an EM410X tag int CmdEM410xSim(const char *Cmd) { @@ -62,12 +69,8 @@ int CmdEM410xSim(const char *Cmd) uint8_t uid[5] = {0x00}; char cmdp = param_getchar(Cmd, 0); - if (cmdp == 'h' || cmdp == 'H') { - PrintAndLog("Usage: lf em4x em410xsim "); - PrintAndLog(""); - PrintAndLog(" sample: lf em4x em410xsim 0F0368568B"); - return 0; - } + if (cmdp == 'h' || cmdp == 'H') return usage_lf_em410x_sim(); + /* clock is 64 in EM410x tags */ uint8_t clock = 64; @@ -75,6 +78,7 @@ int CmdEM410xSim(const char *Cmd) PrintAndLog("UID must include 10 HEX symbols"); return 0; } + param_getdec(Cmd, 1, &clock); PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X clock: %d", uid[0],uid[1],uid[2],uid[3],uid[4],clock); @@ -150,10 +154,12 @@ int CmdEM410xWatch(const char *Cmd) } //currently only supports manchester modulations +// todo: helptext int CmdEM410xWatchnSpoof(const char *Cmd) { + // loops if the captured ID was in XL-format. CmdEM410xWatch(Cmd); - PrintAndLog("# Replaying captured ID: %s",global_em410xId); + PrintAndLog("# Replaying captured ID: %llu", g_em410xid); CmdLFaskSim(""); return 0; } @@ -248,10 +254,12 @@ bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t co uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest) { if (size<45) return 0; + uint32_t code = bytebits_to_byte(BitStream,8); code = code<<8 | bytebits_to_byte(BitStream+9,8); code = code<<8 | bytebits_to_byte(BitStream+18,8); code = code<<8 | bytebits_to_byte(BitStream+27,8); + if (verbose || g_debugMode){ for (uint8_t i = 0; i<5; i++){ if (i == 4) PrintAndLog(""); //parity byte spacer @@ -275,7 +283,7 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool } return code; } -/* Read the transmitted data of an EM4x50 tag +/* Read the transmitted data of an EM4x50 tag from the graphbuffer * Format: * * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity @@ -297,6 +305,7 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool //completed by Marshmellow int EM4x50Read(const char *Cmd, bool verbose) { + uint8_t fndClk[] = {8,16,32,40,50,64,128}; int clk = 0; int invert = 0; @@ -362,7 +371,10 @@ int EM4x50Read(const char *Cmd, bool verbose) break; } } - if (!clk) return 0; + if (!clk) { + PrintAndLog("ERROR: EM4x50 - didn't find a clock"); + return 0; + } } else tol = clk/8; // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2) @@ -483,121 +495,271 @@ int EM4x50Read(const char *Cmd, bool verbose) return (int)AllPTest; } -int CmdEM4x50Read(const char *Cmd) -{ +int CmdEM4x50Read(const char *Cmd) { return EM4x50Read(Cmd, true); } -int CmdReadWord(const char *Cmd) -{ - int Word = -1; //default to invalid word - UsbCommand c; - - sscanf(Cmd, "%d", &Word); +int usage_lf_em_read(void) { + PrintAndLog("Read EM4x05/EM4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em readword [h]
"); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" address - memory address to read. (0-15)"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em readword 1"); + PrintAndLog(" lf em readword 1 11223344"); + return 0; +} + +//search for given preamble in given BitStream and return success=1 or fail=0 and startIndex +uint8_t EMpreambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t size, size_t *startIdx) { + // Sanity check. If preamble length is bigger than bitstream length. + if ( size <= pLen ) return 0; - if ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); - return 1; + // em only sends preamble once, so look for it once in the first x bits + uint8_t foundCnt = 0; + for (int idx = 0; idx < size - pLen; idx++){ + if (memcmp(BitStream+idx, preamble, pLen) == 0){ + //first index found + foundCnt++; + if (foundCnt == 1) { + *startIdx = idx; + return 1; + } + } } - - PrintAndLog("Reading word %d", Word); - - c.cmd = CMD_EM4X_READ_WORD; - c.d.asBytes[0] = 0x0; //Normal mode - c.arg[0] = 0; - c.arg[1] = Word; - c.arg[2] = 0; - SendCommand(&c); return 0; } -int CmdReadWordPWD(const char *Cmd) -{ - int Word = -1; //default to invalid word - int Password = 0xFFFFFFFF; //default to blank password - UsbCommand c; - - sscanf(Cmd, "%d %x", &Word, &Password); - - if ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); - return 1; +#define EM_PREAMBLE_LEN 6 +bool detectFSK(){ + // detect fsk clock + if (!GetFskClock("", FALSE, FALSE)) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK clock failed"); + return FALSE; } + // demod + int ans = FSKrawDemod("0 0", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed"); + return FALSE; + } + return TRUE; +} +// PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... ) +bool detectPSK(){ + int ans = GetPskClock("", FALSE, FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: PSK clock failed"); + return FALSE; + } + PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod"); + return TRUE; +} +// try manchester - NOTE: ST only applies to T55x7 tags. +bool detectASK_MAN(){ + bool stcheck = FALSE; + int ans = ASKDemod_ext("0 0 0", TRUE, FALSE, 1, &stcheck); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed"); + return FALSE; + } + return TRUE; +} +bool detectASK_BI(){ + int ans = ASKbiphaseDemod("0 0 1", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase normal demod failed"); + + ans = ASKbiphaseDemod("0 1 1", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase inverted demod failed"); + return FALSE; + } + } + return TRUE; +} +bool doPreambleSearch(size_t *startIdx){ + + // skip first two 0 bits as they might have been missed in the demod + uint8_t preamble[EM_PREAMBLE_LEN] = {0,0,1,0,1,0}; - PrintAndLog("Reading word %d with password %08X", Word, Password); - - c.cmd = CMD_EM4X_READ_WORD; - c.d.asBytes[0] = 0x1; //Password mode - c.arg[0] = 0; - c.arg[1] = Word; - c.arg[2] = Password; - SendCommand(&c); - return 0; + // set size to 10 to only test first 4 positions for the preamble + size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10; + *startIdx = 0; + + if (g_debugMode) PrintAndLog("Before:: startindex: %u | size: %u", *startIdx, size); + + uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, EM_PREAMBLE_LEN, size, startIdx); + if ( errChk == 0) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", *startIdx); + return FALSE; + } + if (g_debugMode) PrintAndLog("After:: startindex: %u | size: %u", *startIdx, size); + return TRUE; } -int CmdWriteWord(const char *Cmd) -{ - int Word = 16; //default to invalid block - int Data = 0xFFFFFFFF; //default to blank data - UsbCommand c; +// FSK, PSK, ASK/MANCHESTER, ASK/BIPHASE, ASK/DIPHASE +// should cover 90% of known used configs +// the rest will need to be manually demoded for now... +int demodEM4x05resp(uint8_t bitsNeeded) { + + size_t startIdx = 0; + + if (detectASK_MAN() && doPreambleSearch( &startIdx )) + goto EXIT_SET; + + if (detectASK_BI() && doPreambleSearch( &startIdx )) + goto EXIT_SET; - sscanf(Cmd, "%x %d", &Data, &Word); + if (detectFSK() && doPreambleSearch( &startIdx )) + goto EXIT_SET; + + + if (detectPSK() && doPreambleSearch( &startIdx )) + goto EXIT_SET; - if (Word > 15) { - PrintAndLog("Word must be between 0 and 15"); + return -1; + +EXIT_SET: + if ( bitsNeeded < DemodBufferLen) { + setDemodBuf(DemodBuffer + startIdx + EM_PREAMBLE_LEN, bitsNeeded, 0); + CmdPrintDemodBuff("x"); return 1; } + return -1; +} + +int CmdReadWord(const char *Cmd) { + int addr, pwd; + bool usePwd = false; + uint8_t ctmp = param_getchar(Cmd, 0); + if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_read(); + + addr = param_get8ex(Cmd, 0, -1, 10); + pwd = param_get32ex(Cmd, 1, -1, 16); - PrintAndLog("Writing word %d with data %08X", Word, Data); + if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) { + PrintAndLog("Address must be between 0 and 15"); + return 1; + } + if ( pwd == -1 ) + PrintAndLog("Reading address %d", addr); + else { + usePwd = true; + PrintAndLog("Reading address %d | password %08X", addr, pwd); + } - c.cmd = CMD_EM4X_WRITE_WORD; - c.d.asBytes[0] = 0x0; //Normal mode - c.arg[0] = Data; - c.arg[1] = Word; - c.arg[2] = 0; + UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}}; + clearCommandBuffer(); SendCommand(&c); - return 0; + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)){ + PrintAndLog("Command timed out"); + return -1; + } + + uint8_t got[6000]; + GetFromBigBuf(got, sizeof(got), 0); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) { + PrintAndLog("command execution time out"); + return -1; + } + setGraphBuf(got, sizeof(got)); + int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000; + if (graphJustNoise(GraphBuffer, testLen)) { + PrintAndLog("no tag not found"); + return -1; + } + + //attempt demod: + //need 32 bits from a read word + return demodEM4x05resp(32); } -int CmdWriteWordPWD(const char *Cmd) -{ - int Word = 16; //default to invalid word - int Data = 0xFFFFFFFF; //default to blank data - int Password = 0xFFFFFFFF; //default to blank password - UsbCommand c; +int usage_lf_em_write(void) { + PrintAndLog("Write EM4x05/EM4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em writeword [h]
"); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" address - memory address to write to. (0-15)"); + PrintAndLog(" data - data to write (hex)"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em writeword 1"); + PrintAndLog(" lf em writeword 1 deadc0de 11223344"); + return 0; +} +int CmdWriteWord(const char *Cmd) { + uint8_t ctmp = param_getchar(Cmd, 0); + if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_write(); - sscanf(Cmd, "%x %d %x", &Data, &Word, &Password); + bool usePwd = false; + + int addr = 16; // default to invalid address + int data = 0xFFFFFFFF; // default to blank data + int pwd = 0xFFFFFFFF; // default to blank password - if (Word > 15) { - PrintAndLog("Word must be between 0 and 15"); + addr = param_get8ex(Cmd, 0, -1, 10); + data = param_get32ex(Cmd, 1, -1, 16); + pwd = param_get32ex(Cmd, 2, -1, 16); + + if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) { + PrintAndLog("Address must be between 0 and 15"); return 1; } + if ( pwd == -1 ) + PrintAndLog("Writing address %d data %08X", addr, data); + else { + usePwd = true; + PrintAndLog("Writing address %d data %08X using password %08X", addr, data, pwd); + } - PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password); + uint16_t flag = (addr << 8 ) | usePwd; - c.cmd = CMD_EM4X_WRITE_WORD; - c.d.asBytes[0] = 0x1; //Password mode - c.arg[0] = Data; - c.arg[1] = Word; - c.arg[2] = Password; + UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}}; + clearCommandBuffer(); SendCommand(&c); - return 0; + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){ + PrintAndLog("Error occurred, device did not respond during write operation."); + return -1; + } + + //get response if there is one + uint8_t got[6000]; // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples) + GetFromBigBuf(got, sizeof(got), 0); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) { + PrintAndLog("command execution time out"); + return -2; + } + setGraphBuf(got, sizeof(got)); + + //todo: check response for 00001010 then write data for write confirmation! + + //attempt demod: + //need 0 bits demoded (after preamble) to verify write cmd + int result = demodEM4x05resp(0); + if (result == 1) { + PrintAndLog("Write Verified"); + } + return result; } -static command_t CommandTable[] = -{ - {"help", CmdHelp, 1, "This help"}, - {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"}, - {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"}, - {"em410xsim", CmdEM410xSim, 0, " -- Simulate EM410x tag"}, - {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"}, - {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" }, - {"em410xwrite", CmdEM410xWrite, 0, " <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"}, - {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"}, - {"readword", CmdReadWord, 1, " -- Read EM4xxx word data"}, - {"readwordPWD", CmdReadWordPWD, 1, " -- Read EM4xxx word data in password mode"}, - {"writeword", CmdWriteWord, 1, " -- Write EM4xxx word data"}, - {"writewordPWD", CmdWriteWordPWD, 1, " -- Write EM4xxx word data in password mode"}, +static command_t CommandTable[] = { + {"help", CmdHelp, 1, "This help"}, + {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"}, + {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"}, + {"em410xsim", CmdEM410xSim, 0, " -- Simulate EM410x tag"}, + {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"}, + {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" }, + {"em410xwrite", CmdEM410xWrite, 0, " <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"}, + {"em4x50read", CmdEM4x50Read, 1, "demod data from EM4x50 tag from the graphbuffer"}, + {"readword", CmdReadWord, 1, "read EM4x05/4x69 data"}, + {"writeword", CmdWriteWord, 1, "write EM405/4x69 data"}, {NULL, NULL, 0, NULL} };