X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/1417a7f9d00ce5f36c6656a844c7636a3519cfa1..be67483e63430608982f1c92e02b59d7b4dc65b3:/client/cmdcrc.c diff --git a/client/cmdcrc.c b/client/cmdcrc.c index 7fc8bd6e..249fdebc 100644 --- a/client/cmdcrc.c +++ b/client/cmdcrc.c @@ -19,8 +19,6 @@ #include #include -//#include -//#include #include "cmdmain.h" #include "cmdcrc.h" #include "reveng/reveng.h" @@ -41,13 +39,14 @@ int split(char *str, char *arr[MAX_ARGS]){ int wordCnt = 0; while(1){ - while(isspace(str[beginIndex])){ + while(isspace(str[beginIndex])) { ++beginIndex; } - if(str[beginIndex] == '\0') + if(str[beginIndex] == '\0') { break; + } endIndex = beginIndex; - while (str[endIndex] && !isspace(str[endIndex])){ + while (str[endIndex] && !isspace(str[endIndex])) { ++endIndex; } int len = endIndex - beginIndex; @@ -74,10 +73,10 @@ int CmdCrc(const char *Cmd) if (argc == 3 && memcmp(argv[1],"-g",2)==0) { CmdrevengSearch(argv[2]); } else { - reveng_main(argc, argv); + reveng_main(argc, argv); } //PrintAndLog("DEBUG argc: %d, %s %s Cmd: %s",argc, argv[0], Cmd2, Cmd); - for(int i = 0; i < argc; ++i){ + for(int i = 0; i < argc; ++i) { free(argv[i]); } @@ -131,122 +130,131 @@ int GetModels(char *Models[], int *count, uint8_t *width){ mfree(&model); } else { //reveng -s - if(~model.flags & P_MULXN) - return uerr("cannot search for non-Williams compliant models"); + if(~model.flags & P_MULXN) + return uerr("cannot search for non-Williams compliant models"); praloc(&model.spoly, (unsigned long)width[0]); praloc(&model.init, (unsigned long)width[0]); praloc(&model.xorout, (unsigned long)width[0]); - if(!plen(model.spoly)) + + if(!plen(model.spoly)) palloc(&model.spoly, (unsigned long)width[0]); - else + else width[0] = (uint8_t)plen(model.spoly); - /* special case if qpoly is zero, search to end of range */ - if(!ptst(qpoly)) - rflags &= ~R_HAVEQ; - - /* 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(); - - while(psets) { - mbynum(&pset, --psets); - - /* skip if different width, or refin or refout don't match */ - if(plen(pset.spoly) != width[0] || (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; - + /* special case if qpoly is zero, search to end of range */ + if(!ptst(qpoly)) + rflags &= ~R_HAVEQ; + + /* 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(); + + while(psets) { + mbynum(&pset, --psets); + + /* skip if different width, or refin or refout don't match */ + if( plen(pset.spoly) != width[0] || (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; + //for additional args (not used yet, maybe future?) - apoly = pclone(pset.xorout); - if(pset.flags & P_REFOUT) - prev(&apoly); + apoly = pclone(pset.xorout); - 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; - } - width[Cnt] = width[0]; - memcpy(tmp, pset.name, size); - Models[Cnt++] = tmp; - *count = Cnt; - uflags |= C_RESULT; + 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; } + pfree(&crc); } - mfree(&pset); + pfree(&apoly); + + if (qptr == pptr) { - /* 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); + /* 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; + } + width[Cnt] = width[0]; + memcpy(tmp, pset.name, size); + Models[Cnt++] = tmp; + *count = Cnt; + uflags |= C_RESULT; } - } while(~rflags & R_HAVERI && ++pass < 2); - } - //got everything now free the memory... - - if(uflags & C_RESULT) { - for(qptr = apolys; qptr < pptr; ++qptr) - pfree(qptr); - } - 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)) { - mfree(mptr++); } - free(candmods); - if(~rflags & R_HAVERI) { + mfree(&pset); + + /* toggle refIn/refOut and reflect arguments */ + if (~rflags & R_HAVERI) { model.flags ^= P_REFIN | P_REFOUT; - for(qptr = apolys; qptr < pptr; ++qptr) + 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"); - mfree(&model); + } while (~rflags & R_HAVERI && ++pass < 2); + } + //got everything now free the memory... + if (uflags & C_RESULT) { + for (qptr = apolys; qptr < pptr; ++qptr) { + pfree(qptr); + } + } + 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)) { + 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"); + + mfree(&model); } return 1; } @@ -271,7 +279,6 @@ int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *res int ibperhx = 8, obperhx = 8; int rflags = 0; // search flags int c; - unsigned long width = 0UL; poly_t apoly, crc; char *string; @@ -283,15 +290,13 @@ int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *res SETBMP(); //set model - if(!(c = mbynam(&model, inModel))) { + if (!(c = mbynam(&model, inModel))) { PrintAndLog("error: preset model '%s' not found. Use reveng -D to list presets.", inModel); return 0; } - if(c < 0) + if (c < 0) return uerr("no preset models available"); - // must set width so that parameter to -ipx is not zeroed - width = plen(model.spoly); rflags |= R_HAVEP | R_HAVEI | R_HAVERI | R_HAVERO | R_HAVEX; //set flags @@ -321,9 +326,13 @@ int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *res model.flags &= ~P_RTJUST; break; } - + /* canonicalise the model, so the one we dump is the one we + * calculate with (not with -s, spoly may be blank which will + * normalise to zero and clear init and xorout.) + */ mcanon(&model); + if (reverse) { // v calculate reversed CRC /* Distinct from the -V switch as this causes @@ -340,7 +349,7 @@ int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *res * Consequently Init is the mirror image of the * one resulting from -V, and so we have: */ - if(~model.flags & P_REFOUT) { + if (~model.flags & P_REFOUT) { prev(&model.init); prev(&model.xorout); } @@ -355,17 +364,17 @@ int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *res /* in the Williams model, xorout is applied after the refout stage. * as refout is part of ptostr(), we reverse xorout here. */ - if(model.flags & P_REFOUT) + if (model.flags & P_REFOUT) prev(&model.xorout); apoly = strtop(inHexStr, model.flags, ibperhx); - if(reverse) + if (reverse) prev(&apoly); crc = pcrc(apoly, model.spoly, model.init, model.xorout, model.flags); - if(reverse) + if (reverse) prev(&crc); string = ptostr(crc, model.flags, obperhx);