X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b31ef4f5104384d0d301dcd27d11b3a9861b1d82..6f1a597855d5ba70e0d37613ffe144e63690a058:/client/cmdlfem4x.c diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index aa0fc856..820b24e9 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -18,6 +18,7 @@ #include "cmdparser.h" #include "cmddata.h" #include "cmdlf.h" +#include "cmdmain.h" #include "cmdlfem4x.h" #include "lfdemod.h" @@ -285,7 +286,7 @@ 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 @@ -498,53 +499,249 @@ int CmdEM4x50Read(const char *Cmd) return EM4x50Read(Cmd, true); } -int CmdReadWord(const char *Cmd) +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) { - int Word = -1; //default to invalid word - UsbCommand c; - - sscanf(Cmd, "%d", &Word); - - if ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); + // Sanity check. If preamble length is bigger than bitstream length. + if ( size <= pLen ) return 0; + // 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; + } + } + } + return 0; +} + +int demodEM4x05resp(uint8_t bitsNeeded) { + int ans = 0; + bool demodFound = false; + DemodBufferLen = 0x00; + // skip first two 0 bits as they might have been missed in the demod + uint8_t preamble[6] = {0,0,1,0,1,0}; + + // test for FSK wave (easiest to 99% ID) + if (GetFskClock("", FALSE, FALSE)) { + //valid fsk clocks found + ans = FSKrawDemod("0 0", false); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed"); + //return -1; + } else { + // set size to 10 to only test first 4 positions for the preamble + size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10; + size_t startIdx = 0; + + if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size); + + uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx); + if ( errChk == 0) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx); + //return -1; + } else { + //can't test size because the preamble doesn't repeat :( + //meaning chances of false positives are high. + demodFound = true; + } + } + } + + ans = GetPskClock("", FALSE, FALSE); + if (ans>0) { + PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod"); + } + + if (!demodFound) { + DemodBufferLen = 0x00; + //try biphase + ans = ASKbiphaseDemod("0 0 1", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed"); + //return -1; + } else { + // set size to 10 to only test first 4 positions for the preamble + size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10; + size_t startIdx = 0; + + if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size); + + uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx); + if ( errChk == 0) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx); + //return -1; + } else { + //can't test size because the preamble doesn't repeat :( + //meaning chances of false positives are high. + demodFound = true; + } + } + } + + if (!demodFound) { + DemodBufferLen = 0x00; + // try manchester - NOTE: ST only applies to T55x7 tags. + ans = ASKDemod_ext("0,0,1", false, false, 1, false); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed"); + //return -1; + } else { + // set size to 10 to only test first 4 positions for the preamble + size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10; + size_t startIdx = 0; + + if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size); + + uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx); + if ( errChk == 0) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx); + //return -1; + } else { + //can't test size because the preamble doesn't repeat :( + //meaning chances of false positives are high. + demodFound = true; + } + } + } + + if (demodFound && bitsNeeded < DemodBufferLen) { + setDemodBuf(DemodBuffer + ans + sizeof(preamble), 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("Reading word %d", Word); + 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_READ_WORD; - c.d.asBytes[0] = 0x0; //Normal mode - c.arg[0] = 0; - 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; + } + + //need 32 bits for read word + demodEM4x05resp(32); + + return 1; } -int CmdReadWordPWD(const char *Cmd) -{ - int Word = -1; //default to invalid word - 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(); + + bool usePwd = false; + + int addr = 16; // default to invalid address + int data = 0xFFFFFFFF; // default to blank data + int pwd = 0xFFFFFFFF; // default to blank password - sscanf(Cmd, "%d %x", &Word, &Password); + addr = param_get8ex(Cmd, 0, -1, 10); + data = param_get32ex(Cmd, 1, -1, 16); + pwd = param_get32ex(Cmd, 2, -1, 16); - if ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); + + 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("Reading word %d with password %08X", Word, Password); + uint16_t flag = (addr << 8 ) | usePwd; - 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; + UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}}; + clearCommandBuffer(); SendCommand(&c); + 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, 8000) ) { + PrintAndLog("command execution time out"); + return 0; + } + setGraphBuf(got, sizeof(got)); + //todo: check response for 00001010 then write data for write confirmation! return 0; } +/* int CmdWriteWord(const char *Cmd) { int Word = 16; //default to invalid block @@ -593,7 +790,7 @@ int CmdWriteWordPWD(const char *Cmd) SendCommand(&c); return 0; } - +*/ static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, @@ -603,11 +800,11 @@ static command_t CommandTable[] = {"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"}, + {"em4x50read", CmdEM4x50Read, 1, "demod data from EM4x50 tag from the graph buffer"}, + {"readword", CmdReadWord, 1, " (pwd) -- Read EM4x05/EM4x69 word data"}, + //{"readwordPWD", CmdReadWordPWD, 1, " -- Read EM4xxx word data in password mode"}, + {"writeword", CmdWriteWord, 1, " (pwd) -- Write EM4x05/EM4x69 word data"}, + //{"writewordPWD", CmdWriteWordPWD, 1, " -- Write EM4xxx word data in password mode"}, {NULL, NULL, 0, NULL} };