X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/3775e9e8651ee9d11c11efca550442128f468ee5..757221f5d6db8f1d9447d59c71a9807c6a9f522f:/client/cmdcrc.c diff --git a/client/cmdcrc.c b/client/cmdcrc.c deleted file mode 100644 index 0ca2b8b1..00000000 --- a/client/cmdcrc.c +++ /dev/null @@ -1,547 +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 -//----------------------------------------------------------------------------- - -#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((unsigned char)str[beginIndex])){ - ++beginIndex; - } - if(str[beginIndex] == '\0') { - break; - } - endIndex = beginIndex; - while (str[endIndex] && !isspace((unsigned char)str[endIndex])){ - ++endIndex; - } - int len = endIndex - beginIndex; - char *tmp = calloc(len + 1, sizeof(char)); - memcpy(tmp, &str[beginIndex], len); - arr[wordCnt++] = tmp; - //PrintAndLog("DEBUG 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); - - if (argc == 3 && memcmp(argv[1],"-g",2)==0) { - CmdrevengSearch(argv[2]); - } else { - reveng_main(argc, argv); - } - //PrintAndLog("DEBUG argc: %d, %s %s Cmd: %s",argc, argv[0], Cmd2, Cmd); - for(int i = 0; i < argc; ++i){ - free(argv[i]); - } - - return 0; -} - -//returns array of model names and the count of models returning -// as well as a width array for the width of each model -int GetModels(char *Models[], int *count, uint8_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 */ - poly_t apoly, crc, qpoly = PZERO, *apolys = NULL, *pptr = NULL, *qptr = NULL; - model_t pset = model, *candmods, *mptr; - - /* stdin must be binary */ - #ifdef _WIN32 - _setmode(STDIN_FILENO, _O_BINARY); - #endif /* _WIN32 */ - - SETBMP(); - - int args = 0, psets, pass; - int Cnt = 0; - if (width[0] == 0) { //reveng -D - *count = mcount(); - 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; - char *tmp = calloc(size+1, sizeof(char)); - if (tmp==NULL) - return uerr("out of memory?"); - - memcpy(tmp, model.name, size); - Models[mode] = tmp; - width[mode] = plen(model.spoly); - } - mfree(&model); - } else { //reveng -s - - 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)) - palloc(&model.spoly, (unsigned long)width[0]); - 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; - - - /* not going to be sending additional args at this time (maybe future?) - - // 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[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); - - 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; - } - } - 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); - } - //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; -} - -//test call to GetModels -int CmdrevengTest(const char *Cmd){ - char *Models[80]; - int count = 0; - uint8_t widtharr[80] = {0}; - uint8_t width = 0; - width = param_get8(Cmd, 0); - //PrintAndLog("width: %d",width); - if (width > 89) - return uerr("Width cannot exceed 89"); - - widtharr[0] = width; - int ans = GetModels(Models, &count, widtharr); - if (!ans) return 0; - - PrintAndLog("Count: %d",count); - for (int i = 0; i < count; i++){ - PrintAndLog("Model %d: %s, width: %d",i,Models[i], widtharr[i]); - free(Models[i]); - } - return 1; -} - -//-c || -v -//inModel = valid model name string - CRC-8 -//inHexStr = input hex string to calculate crc on -//reverse = reverse calc option if true -//endian = {0 = calc default endian input and output, b = big endian input and output, B = big endian output, r = right justified -// l = little endian input and output, L = little endian output only, t = left justified} -//result = calculated crc hex string -int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, 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; - 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; - - //set flags - switch (endian) { - case 'b': /* b big-endian (RefIn = false, RefOut = false ) */ - model.flags &= ~P_REFIN; - rflags |= R_HAVERI; - /* fall through: */ - case 'B': /* B big-endian output (RefOut = false) */ - model.flags &= ~P_REFOUT; - rflags |= R_HAVERO; - mnovel(&model); - /* fall through: */ - case 'r': /* r right-justified */ - model.flags |= P_RTJUST; - break; - case 'l': /* l little-endian input and output */ - model.flags |= P_REFIN; - rflags |= R_HAVERI; - /* fall through: */ - case 'L': /* L little-endian output */ - model.flags |= P_REFOUT; - rflags |= R_HAVERO; - mnovel(&model); - /* fall through: */ - case 't': /* t left-justified */ - model.flags &= ~P_RTJUST; - break; - } - - 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; - char endian = 0; - dataLen = param_getstr(Cmd, cmdp++, inModel, sizeof(inModel)); - if (dataLen < 4) return 0; - dataLen = param_getstr(Cmd, cmdp++, inHexStr, sizeof(inHexStr)); - if (dataLen < 4) return 0; - bool reverse = (param_get8(Cmd, cmdp++)) ? true : false; - endian = param_getchar(Cmd, cmdp++); - - //PrintAndLog("mod: %s, hex: %s, rev %d", inModel, inHexStr, reverse); - int ans = RunModel(inModel, inHexStr, reverse, endian, result); - if (!ans) return 0; - - PrintAndLog("Result: %s",result); - return 1; -} - -//returns a calloced string (needs to be freed) -char *SwapEndianStr(const char *inStr, const size_t len, const uint8_t blockSize){ - char *tmp = calloc(len+1, sizeof(char)); - for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){ - for (size_t i = 0; i < blockSize; i+=2){ - tmp[i+(blockSize*block)] = inStr[(blockSize-1-i-1)+(blockSize*block)]; - tmp[i+(blockSize*block)+1] = inStr[(blockSize-1-i)+(blockSize*block)]; - } - } - return tmp; -} - -// takes hex string in and searches for a matching result (hex string must include checksum) -int CmdrevengSearch(const char *Cmd){ - char inHexStr[50] = {0x00}; - int dataLen = param_getstr(Cmd, 0, inHexStr, sizeof(inHexStr)); - if (dataLen < 4) return 0; - - char *Models[80]; - int count = 0; - uint8_t width[80]; - width[0] = 0; - uint8_t crcChars = 0; - char result[30]; - char revResult[30]; - int ans = GetModels(Models, &count, width); - bool found = false; - if (!ans) return 0; - - // try each model and get result - for (int i = 0; i < count; i++){ - /*if (found) { - free(Models[i]); - continue; - }*/ - // round up to # of characters in this model's crc - crcChars = ((width[i]+7)/8)*2; - // can't test a model that has more crc digits than our data - if (crcChars >= dataLen) - continue; - memset(result, 0, 30); - char *inCRC = calloc(crcChars+1, sizeof(char)); - memcpy(inCRC, inHexStr+(dataLen-crcChars), crcChars); - - char *outHex = calloc(dataLen-crcChars+1, sizeof(char)); - memcpy(outHex, inHexStr, dataLen-crcChars); - - //PrintAndLog("DEBUG: dataLen: %d, crcChars: %d, Model: %s, CRC: %s, width: %d, outHex: %s",dataLen, crcChars, Models[i], inCRC, width[i], outHex); - ans = RunModel(Models[i], outHex, false, 0, result); - if (ans) { - //test for match - if (memcmp(result, inCRC, crcChars)==0){ - PrintAndLog("\nFound a possible match!\nModel: %s\nValue: %s\n",Models[i], result); - //optional - stop searching if found... - found = true; - } else { - if (crcChars > 2){ - char *swapEndian = SwapEndianStr(result, crcChars, crcChars); - if (memcmp(swapEndian, inCRC, crcChars)==0){ - PrintAndLog("\nFound a possible match!\nModel: %s\nValue EndianSwapped: %s\n",Models[i], swapEndian); - //optional - stop searching if found... - found = true; - } - free(swapEndian); - } - } - } - - //if (!found){ - ans = RunModel(Models[i], outHex, true, 0, revResult); - if (ans) { - //test for match - if (memcmp(revResult, inCRC, crcChars)==0){ - PrintAndLog("\nFound a possible match!\nModel Reversed: %s\nValue: %s\n",Models[i], revResult); - //optional - stop searching if found... - found = true; - } else { - if (crcChars > 2){ - char *swapEndian = SwapEndianStr(revResult, crcChars, crcChars); - if (memcmp(swapEndian, inCRC, crcChars)==0){ - PrintAndLog("\nFound a possible match!\nModel Reversed: %s\nValue EndianSwapped: %s\n",Models[i], swapEndian); - //optional - stop searching if found... - found = true; - } - free(swapEndian); - } - } - } - //} - free(inCRC); - free(outHex); - free(Models[i]); - } - if (!found) PrintAndLog("\nNo matches found\n"); - return 1; -}