X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f46c3663218b685d7d5ed83781daea1360595261..2d3c535ec9eed70422bdf46c64d421f87185beee:/client/cmdcrc.c diff --git a/client/cmdcrc.c b/client/cmdcrc.c index 7d021965..82504db7 100644 --- a/client/cmdcrc.c +++ b/client/cmdcrc.c @@ -8,6 +8,15 @@ // CRC Calculations from the software reveng commands //----------------------------------------------------------------------------- +#include +#ifdef _WIN32 +# include +# include +# ifndef STDIN_FILENO +# define STDIN_FILENO 0 +# endif /* STDIN_FILENO */ +#endif /* _WIN32 */ + #include #include //#include @@ -20,32 +29,37 @@ #define MAX_ARGS 20 +int uerr(char *msg){ + PrintAndLog("%s",msg); + return 0; +} + int split(char *str, char *arr[MAX_ARGS]){ - int beginIndex = 0; - int endIndex; - int maxWords = MAX_ARGS; - int wordCnt = 0; - - while(1){ - while(isspace(str[beginIndex])){ - ++beginIndex; - } - if(str[beginIndex] == '\0') - break; - endIndex = beginIndex; - while (str[endIndex] && !isspace(str[endIndex])){ - ++endIndex; - } - int len = endIndex - beginIndex; - char *tmp = calloc(len + 1, sizeof(char)); - memcpy(tmp, &str[beginIndex], len); - arr[wordCnt++] = tmp; - //PrintAndLog("cnt: %d, %s",wordCnt-1, arr[wordCnt-1]); - beginIndex = endIndex; - if (wordCnt == maxWords) - break; - } - return wordCnt; + int beginIndex = 0; + int endIndex; + int maxWords = MAX_ARGS; + int wordCnt = 0; + + while(1){ + while(isspace(str[beginIndex])){ + ++beginIndex; + } + if(str[beginIndex] == '\0') + break; + endIndex = beginIndex; + while (str[endIndex] && !isspace(str[endIndex])){ + ++endIndex; + } + int len = endIndex - beginIndex; + char *tmp = calloc(len + 1, sizeof(char)); + memcpy(tmp, &str[beginIndex], len); + arr[wordCnt++] = tmp; + //PrintAndLog("cnt: %d, %s",wordCnt-1, arr[wordCnt-1]); + beginIndex = endIndex; + if (wordCnt == maxWords) + break; + } + return wordCnt; } int CmdCrc(const char *Cmd) @@ -66,3 +80,216 @@ int CmdCrc(const char *Cmd) return 0; } +int GetModels(char *Models[], int *count, uint32_t *width){ + /* default values */ + static model_t model = { + PZERO, /* no CRC polynomial, user must specify */ + PZERO, /* Init = 0 */ + P_BE, /* RefIn = false, RefOut = false, plus P_RTJUST setting in reveng.h */ + PZERO, /* XorOut = 0 */ + PZERO, /* check value unused */ + NULL /* no model name */ + }; + int ibperhx = 8;//, obperhx = 8; + int rflags = 0, uflags = 0; /* search and UI flags */ + + //unsigned long width = 0UL; + //int c, mode = 0, args, psets, pass; + poly_t apoly, crc, qpoly = PZERO, *apolys = NULL, *pptr = NULL, *qptr = NULL; + model_t pset = model, *candmods, *mptr; + //char *string; + + //myname = argv[0]; + + /* stdin must be binary */ + #ifdef _WIN32 + _setmode(STDIN_FILENO, _O_BINARY); + #endif /* _WIN32 */ + + SETBMP(); + + //pos=0; + //optind=1; + + int args = 0, psets, pass; + int Cnt = 0; + if (*width == 0) { //reveng -D + *count = mcount(); + //PrintAndLog("Count: %d",*count); + if(!*count) + return uerr("no preset models available"); + + for(int mode = 0; mode < *count; ++mode) { + mbynum(&model, mode); + mcanon(&model); + size_t size = (model.name && *model.name) ? strlen(model.name) : 6; + //PrintAndLog("Size: %d, %s",size,model.name); + char *tmp = calloc(size+1, sizeof(char)); + if (tmp==NULL) + return uerr("out of memory?"); + + memcpy(tmp, model.name, size); + Models[mode] = tmp; + //ufound(&model); + } + } else { //reveng -s + + if(~model.flags & P_MULXN) + return uerr("cannot search for non-Williams compliant models"); + + praloc(&model.spoly, *width); + praloc(&model.init, *width); + praloc(&model.xorout, *width); + if(!plen(model.spoly)) + palloc(&model.spoly, *width); + else + *width = plen(model.spoly); + + /* special case if qpoly is zero, search to end of range */ + if(!ptst(qpoly)) + rflags &= ~R_HAVEQ; + + + /* not going to be sending additional args + + // allocate argument array + args = argc - optind; + if(!(apolys = malloc(args * sizeof(poly_t)))) + return uerr("cannot allocate memory for argument list"); + + for(pptr = apolys; optind < argc; ++optind) { + if(uflags & C_INFILE) + *pptr++ = rdpoly(argv[optind], model.flags, ibperhx); + else + *pptr++ = strtop(argv[optind], model.flags, ibperhx); + } + // exit value of pptr is used hereafter! + + */ + + /* if endianness not specified, try + * little-endian then big-endian. + * NB: crossed-endian algorithms will not be + * searched. + */ + /* scan against preset models */ + if(~uflags & C_FORCE) { + pass = 0; + Cnt = 0; + do { + psets = mcount(); + //PrintAndLog("psets: %d",psets); + while(psets) { + mbynum(&pset, --psets); + + /* skip if different width, or refin or refout don't match */ + if(plen(pset.spoly) != *width || (model.flags ^ pset.flags) & (P_REFIN | P_REFOUT)) + continue; + /* skip if the preset doesn't match specified parameters */ + if(rflags & R_HAVEP && pcmp(&model.spoly, &pset.spoly)) + continue; + if(rflags & R_HAVEI && psncmp(&model.init, &pset.init)) + continue; + if(rflags & R_HAVEX && psncmp(&model.xorout, &pset.xorout)) + continue; + + apoly = pclone(pset.xorout); + if(pset.flags & P_REFOUT) + prev(&apoly); + for(qptr = apolys; qptr < pptr; ++qptr) { + crc = pcrc(*qptr, pset.spoly, pset.init, apoly, 0); + if(ptst(crc)) { + pfree(&crc); + break; + } else + pfree(&crc); + } + pfree(&apoly); + if(qptr == pptr) { + /* the selected model solved all arguments */ + mcanon(&pset); + + size_t size = (pset.name && *pset.name) ? strlen(pset.name) : 6; + //PrintAndLog("Size: %d, %s, count: %d",size,pset.name, Cnt); + char *tmp = calloc(size+1, sizeof(char)); + if (tmp==NULL){ + PrintAndLog("out of memory?"); + return 0; + } + memcpy(tmp, pset.name, size); + Models[Cnt++] = tmp; + *count = Cnt; + //ufound(&pset); + uflags |= C_RESULT; + } + } + mfree(&pset); + + /* toggle refIn/refOut and reflect arguments */ + if(~rflags & R_HAVERI) { + model.flags ^= P_REFIN | P_REFOUT; + for(qptr = apolys; qptr < pptr; ++qptr) + prevch(qptr, ibperhx); + } + } while(~rflags & R_HAVERI && ++pass < 2); + } + if(uflags & C_RESULT) { + for(qptr = apolys; qptr < pptr; ++qptr) + pfree(qptr); + return 1; + //exit(EXIT_SUCCESS); + } + if(!(model.flags & P_REFIN) != !(model.flags & P_REFOUT)) + return uerr("cannot search for crossed-endian models"); + pass = 0; + do { + mptr = candmods = reveng(&model, qpoly, rflags, args, apolys); + if(mptr && plen(mptr->spoly)) + uflags |= C_RESULT; + while(mptr && plen(mptr->spoly)) { + /* results were printed by the callback + * string = mtostr(mptr); + * puts(string); + * free(string); + */ + mfree(mptr++); + } + free(candmods); + if(~rflags & R_HAVERI) { + model.flags ^= P_REFIN | P_REFOUT; + for(qptr = apolys; qptr < pptr; ++qptr) + prevch(qptr, ibperhx); + } + } while(~rflags & R_HAVERI && ++pass < 2); + for(qptr = apolys; qptr < pptr; ++qptr) + pfree(qptr); + free(apolys); + if(~uflags & C_RESULT) + return uerr("no models found"); + + + } + //PrintAndLog("DONE"); + return 1; +} + +//test call to GetModels +int CmdrevengTest(const char *Cmd){ + char *Models[80]; + int count = 0; + uint32_t width = 0; + width = param_get8(Cmd, 0); + //PrintAndLog("width: %d",width); + if (width > 89) + return uerr("Width cannot exceed 89"); + + int ans = GetModels(Models, &count, &width); + if (!ans) return 0; + + PrintAndLog("Count: %d",count); + for (int i = 0; i < count; i++){ + PrintAndLog("Model %d: %s",i,Models[i]); + free(Models[i]); + } + return 1; +}