X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/660d641a03456e99ea83c68dbd3d03bae2b64573..83f3f8ac40b47e220954e620a5ecbe41f54f4dc7:/client/cmdlfhitag.c diff --git a/client/cmdlfhitag.c b/client/cmdlfhitag.c index c648f6a5..fe5ba587 100644 --- a/client/cmdlfhitag.c +++ b/client/cmdlfhitag.c @@ -12,7 +12,6 @@ #include #include #include "data.h" -//#include "proxusb.h" #include "proxmark3.h" #include "ui.h" #include "cmdparser.h" @@ -24,111 +23,131 @@ static int CmdHelp(const char *Cmd); +size_t nbytes(size_t nbits) { + return (nbits/8)+((nbits%8)>0); +} + int CmdLFHitagList(const char *Cmd) { - uint8_t got[3000]; - GetFromBigBuf(got,sizeof(got),0); - WaitForResponse(CMD_ACK,NULL); - - PrintAndLog("recorded activity:"); - PrintAndLog(" ETU :rssi: who bytes"); - PrintAndLog("---------+----+----+-----------"); + uint8_t *got = malloc(USB_CMD_DATA_SIZE); - int i = 0; - int prev = -1; + // Query for the actual size of the trace + UsbCommand response; + GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0); + WaitForResponse(CMD_ACK, &response); + uint16_t traceLen = response.arg[2]; + if (traceLen > USB_CMD_DATA_SIZE) { + uint8_t *p = realloc(got, traceLen); + if (p == NULL) { + PrintAndLog("Cannot allocate memory for trace"); + free(got); + return 2; + } + got = p; + GetFromBigBuf(got, traceLen, 0); + WaitForResponse(CMD_ACK,NULL); + } + + PrintAndLog("recorded activity (TraceLen = %d bytes):"); + PrintAndLog(" ETU :nbits: who bytes"); + PrintAndLog("---------+-----+----+-----------"); - char filename[256]; - FILE* pf = NULL; - - for (;;) { - if(i >= 1900) { - break; - } + int i = 0; + int prev = -1; + int len = strlen(Cmd); - bool isResponse; - int timestamp = *((uint32_t *)(got+i)); - if (timestamp & 0x80000000) { - timestamp &= 0x7fffffff; - isResponse = 1; - } else { - isResponse = 0; - } + char filename[FILE_PATH_SIZE] = { 0x00 }; + FILE* pf = NULL; + + if (len > FILE_PATH_SIZE) + len = FILE_PATH_SIZE; + memcpy(filename, Cmd, len); + + if (strlen(filename) > 0) { + if ((pf = fopen(filename,"wb")) == NULL) { + PrintAndLog("Error: Could not open file [%s]",filename); + return 1; + } + } - int metric = 0; - int parityBits = *((uint32_t *)(got+i+4)); - // 4 bytes of additional information... - // maximum of 32 additional parity bit information - // - // TODO: - // at each quarter bit period we can send power level (16 levels) - // or each half bit period in 256 levels. + for (;;) { + + if(i > traceLen) { break; } - int len = got[i+8]; + bool isResponse; + int timestamp = *((uint32_t *)(got+i)); + if (timestamp & 0x80000000) { + timestamp &= 0x7fffffff; + isResponse = 1; + } else { + isResponse = 0; + } - if (len > 100) { - break; - } - if (i + len >= 1900) { - break; - } + int parityBits = *((uint32_t *)(got+i+4)); + // 4 bytes of additional information... + // maximum of 32 additional parity bit information + // + // TODO: + // at each quarter bit period we can send power level (16 levels) + // or each half bit period in 256 levels. - uint8_t *frame = (got+i+9); + int bits = got[i+8]; + int len = nbytes(got[i+8]); - // Break and stick with current result if buffer was not completely full - if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; } + if (len > 100) { + break; + } + if (i + len > traceLen) { break;} - char line[1000] = ""; - int j; - for (j = 0; j < len; j++) { - int oddparity = 0x01; - int k; + uint8_t *frame = (got+i+9); - for (k=0;k<8;k++) { - oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01); - } + // Break and stick with current result if buffer was not completely full + if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; } - //if((parityBits >> (len - j - 1)) & 0x01) { - if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) { - sprintf(line+(j*4), "%02x! ", frame[j]); - } - else { - sprintf(line+(j*4), "%02x ", frame[j]); - } - } + char line[1000] = ""; + int j; + for (j = 0; j < len; j++) { + int oddparity = 0x01; + int k; - char metricString[100]; - if (isResponse) { - sprintf(metricString, "%3d", metric); - } else { - strcpy(metricString, " "); - } + for (k=0;k<8;k++) { + oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01); + } - PrintAndLog(" +%7d: %s: %s %s", - (prev < 0 ? 0 : (timestamp - prev)), - metricString, - (isResponse ? "TAG" : " "), - line); + //if((parityBits >> (len - j - 1)) & 0x01) { + if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) { + sprintf(line+(j*4), "%02x! ", frame[j]); + } + else { + sprintf(line+(j*4), "%02x ", frame[j]); + } + } + PrintAndLog(" +%7d: %3d: %s %s", + (prev < 0 ? 0 : (timestamp - prev)), + bits, + (isResponse ? "TAG" : " "), + line); - if (pf) { - fprintf(pf," +%7d: %s: %s %s %s", - (prev < 0 ? 0 : (timestamp - prev)), - metricString, - (isResponse ? "TAG" : " "), - line, - "\n"); - } - - prev = timestamp; - i += (len + 9); - } + if (pf) { + fprintf(pf," +%7d: %3d: %s %s\n", + (prev < 0 ? 0 : (timestamp - prev)), + bits, + (isResponse ? "TAG" : " "), + line); + } + + prev = timestamp; + i += (len + 9); + } - if (pf) { - PrintAndLog("Recorded activity succesfully written to file: %s", filename); - fclose(pf); - } - - return 0; + if (pf) { + fclose(pf); + PrintAndLog("Recorded activity succesfully written to file: %s", filename); + } + + free(got); + return 0; } int CmdLFHitagSnoop(const char *Cmd) { @@ -138,12 +157,14 @@ int CmdLFHitagSnoop(const char *Cmd) { } int CmdLFHitagSim(const char *Cmd) { + UsbCommand c = {CMD_SIMULATE_HITAG}; - char filename[256] = { 0x00 }; + char filename[FILE_PATH_SIZE] = { 0x00 }; FILE* pf; bool tag_mem_supplied; - - param_getstr(Cmd,0,filename); + int len = strlen(Cmd); + if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE; + memcpy(filename, Cmd, len); if (strlen(filename) > 0) { if ((pf = fopen(filename,"rb+")) == NULL) { @@ -151,7 +172,11 @@ int CmdLFHitagSim(const char *Cmd) { return 1; } tag_mem_supplied = true; - fread(c.d.asBytes,48,1,pf); + if (fread(c.d.asBytes,48,1,pf) == 0) { + PrintAndLog("Error: File reading error"); + fclose(pf); + return 1; + } fclose(pf); } else { tag_mem_supplied = false; @@ -232,24 +257,24 @@ int CmdLFHitagReader(const char *Cmd) { return 0; } -static command_t CommandTableHitag[] = +static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, - {"list", CmdLFHitagList, 1, "List Hitag trace history"}, + {"list", CmdLFHitagList, 1, " List Hitag trace history"}, {"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"}, - {"sim", CmdLFHitagSim, 1, "Simulate Hitag transponder"}, + {"sim", CmdLFHitagSim, 1, " Simulate Hitag transponder"}, {"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"}, {NULL, NULL, 0, NULL} }; int CmdLFHitag(const char *Cmd) { - CmdsParse(CommandTableHitag, Cmd); + CmdsParse(CommandTable, Cmd); return 0; } int CmdHelp(const char *Cmd) { - CmdsHelp(CommandTableHitag); + CmdsHelp(CommandTable); return 0; }