X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/37f4270a244eae21f8a423e81b384e62a7a2582d..fb69dd881afe66618bb069e7f3b3cfe34d917007:/client/cmdcrc.c diff --git a/client/cmdcrc.c b/client/cmdcrc.c deleted file mode 100644 index f93ab99d..00000000 --- a/client/cmdcrc.c +++ /dev/null @@ -1,418 +0,0 @@ -//----------------------------------------------------------------------------- -// Copyright (C) 2015 iceman -// -// This code is licensed to you under the terms of the GNU GPL, version 2 or, -// at your option, any later version. See the LICENSE.txt file for the text of -// the license. -//----------------------------------------------------------------------------- -// 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 -//#include -#include "cmdmain.h" -#include "cmdcrc.h" -#include "reveng/reveng.h" -#include "ui.h" -#include "util.h" - -#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 CmdCrc(const char *Cmd) -{ - char name[] = {"reveng "}; - char Cmd2[50 + 7]; - memcpy(Cmd2, name, 7); - memcpy(Cmd2 + 7, Cmd, 50); - char *argv[MAX_ARGS]; - int argc = split(Cmd2, argv); - //PrintAndLog("argc: %d, %s %s Cmd: %s",argc, argv[0], Cmd2, Cmd); - reveng_main(argc, argv); - for(int i = 0; i < argc; ++i){ - //puts(arr[i]); - free(argv[i]); - } - - 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; -} - -//-c || -v -int RunModel(char *inModel, char *inHexStr, bool reverse, char *result){ - /* 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; // search flags - int c; - unsigned long width = 0UL; - poly_t apoly, crc; - - char *string; - - // stdin must be binary - #ifdef _WIN32 - _setmode(STDIN_FILENO, _O_BINARY); - #endif /* _WIN32 */ - - SETBMP(); - //set model - if(!(c = mbynam(&model, inModel))) { - fprintf(stderr,"error: preset model '%s' not found. Use reveng -D to list presets.\n", inModel); - return 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; - - mcanon(&model); - - if (reverse) { - // v calculate reversed CRC - /* Distinct from the -V switch as this causes - * the arguments and output to be reversed as well. - */ - // reciprocate Poly - prcp(&model.spoly); - - /* mrev() does: - * if(refout) prev(init); else prev(xorout); - * but here the entire argument polynomial is - * reflected, not just the characters, so RefIn - * and RefOut are not inverted as with -V. - * Consequently Init is the mirror image of the - * one resulting from -V, and so we have: - */ - if(~model.flags & P_REFOUT) { - prev(&model.init); - prev(&model.xorout); - } - - // swap init and xorout - apoly = model.init; - model.init = model.xorout; - model.xorout = apoly; - } - // c calculate CRC - - // validate inputs - /* if(plen(model.spoly) == 0) { - * fprintf(stderr,"%s: no polynomial specified for -%c (add -w WIDTH -p POLY)\n", myname, mode); - * exit(EXIT_FAILURE); - * } - */ - - /* 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) - prev(&model.xorout); - - apoly = strtop(inHexStr, model.flags, ibperhx); - - if(reverse) - prev(&apoly); - - crc = pcrc(apoly, model.spoly, model.init, model.xorout, model.flags); - - if(reverse) - prev(&crc); - - string = ptostr(crc, model.flags, obperhx); - for (int i = 0; i < 50; i++){ - result[i] = string[i]; - if (result[i]==0) break; - } - free(string); - pfree(&crc); - pfree(&apoly); - return 1; -} - -//test call to RunModel -int CmdrevengTestC(const char *Cmd){ - int cmdp = 0; - char inModel[30] = {0x00}; - char inHexStr[30] = {0x00}; - char result[30]; - int dataLen; - - dataLen = param_getstr(Cmd, cmdp++, inModel); - if (dataLen < 4) return 0; - dataLen = param_getstr(Cmd, cmdp++, inHexStr); - if (dataLen < 4) return 0; - bool reverse = (param_get8(Cmd, cmdp)) ? true : false; - - //PrintAndLog("mod: %s, hex: %s, rev %d", inModel, inHexStr, reverse); - int ans = RunModel(inModel, inHexStr, reverse, result); - if (!ans) return 0; - - PrintAndLog("Result: %s",result); - return 1; -}