]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - client/cmdcrc.c
Update lfsampling.c
[proxmark3-svn] / client / cmdcrc.c
index 3e68afb947ce470c01289d86e32014f002cd9877..27d081b911de0c459206092d40473020d4002b17 100644 (file)
@@ -8,7 +8,6 @@
 // CRC Calculations from the software reveng commands
 //-----------------------------------------------------------------------------
 
-#include <stdlib.h>
 #ifdef _WIN32
 #  include <io.h>
 #  include <fcntl.h>
@@ -19,8 +18,8 @@
 
 #include <stdio.h>
 #include <string.h>
-//#include <stdlib.h>
-//#include <ctype.h>
+#include <stdlib.h>
+#include <ctype.h>
 #include "cmdmain.h"
 #include "cmdcrc.h"
 #include "reveng/reveng.h"
@@ -44,9 +43,10 @@ int split(char *str, char *arr[MAX_ARGS]){
                while(isspace(str[beginIndex])){
                        ++beginIndex;
                }
-               if(str[beginIndex] == '\0')
+               if(str[beginIndex] == '\0') {
                        break;
-                       endIndex = beginIndex;
+               }
+               endIndex = beginIndex;
                while (str[endIndex] && !isspace(str[endIndex])){
                        ++endIndex;
                }
@@ -54,7 +54,7 @@ int split(char *str, char *arr[MAX_ARGS]){
                char *tmp = calloc(len + 1, sizeof(char));
                memcpy(tmp, &str[beginIndex], len);
                arr[wordCnt++] = tmp;
-               //PrintAndLog("cnt: %d, %s",wordCnt-1, arr[wordCnt-1]);
+               //PrintAndLog("DEBUG cnt: %d, %s",wordCnt-1, arr[wordCnt-1]);
                beginIndex = endIndex;
                if (wordCnt == maxWords)
                        break;
@@ -70,17 +70,23 @@ int CmdCrc(const char *Cmd)
        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);
+
+       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){
-               //puts(arr[i]);
                free(argv[i]);
        }
 
        return 0;
 }
 
-int GetModels(char *Models[], int *count, uint32_t *width){
+//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 */
@@ -90,16 +96,11 @@ int GetModels(char *Models[], int *count, uint32_t *width){
                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
@@ -108,14 +109,10 @@ int GetModels(char *Models[], int *count, uint32_t *width){
 
        SETBMP();
        
-       //pos=0;
-       //optind=1;
-
        int args = 0, psets, pass;
        int Cnt = 0;
-       if (*width == 0) { //reveng -D
+       if (width[0] == 0) { //reveng -D
                *count = mcount();
-               //PrintAndLog("Count: %d",*count);
                if(!*count)
                        return uerr("no preset models available");
 
@@ -123,153 +120,151 @@ int GetModels(char *Models[], int *count, uint32_t *width){
                        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);
+                       width[mode] = plen(model.spoly);
                }
+               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, *width);
-                       praloc(&model.init, *width);
-                       praloc(&model.xorout, *width);
-                       if(!plen(model.spoly))
-                               palloc(&model.spoly, *width);
-                       else
-                               *width = plen(model.spoly);
+               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;
+               /* special case if qpoly is zero, search to end of range */
+               if(!ptst(qpoly))
+                       rflags &= ~R_HAVEQ;
 
 
-                       /* not going to be sending additional args
+               /* 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");
+               // 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);
+               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! 
+       
+               */
 
-                                       /* 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");
+               /* 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 {
-                               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++);
+                               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;
+                                       }
                                }
-                               free(candmods);
+                               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);
-                       free(apolys);
-                       if(~uflags & C_RESULT)
-                               return uerr("no models found");
-
-
+               }
+               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);
        }
-       //PrintAndLog("DONE");
        return 1;
 }
 
@@ -277,18 +272,20 @@ int GetModels(char *Models[], int *count, uint32_t *width){
 int CmdrevengTest(const char *Cmd){
        char *Models[80];
        int count = 0;
-       uint32_t width = 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");
 
-       int ans = GetModels(Models, &count, &width);
+       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",i,Models[i]);
+               PrintAndLog("Model %d: %s, width: %d",i,Models[i], widtharr[i]);
                free(Models[i]);
        }
        return 1;
@@ -314,7 +311,7 @@ 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;
+       //unsigned long width;
        poly_t apoly, crc;
 
        char *string;
@@ -334,7 +331,7 @@ int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *res
                return uerr("no preset models available");
 
        // must set width so that parameter to -ipx is not zeroed 
-       width = plen(model.spoly);
+       //width = plen(model.spoly);
        rflags |= R_HAVEP | R_HAVEI | R_HAVERI | R_HAVERO | R_HAVEX;
        
        //set flags
@@ -437,9 +434,9 @@ int CmdrevengTestC(const char *Cmd){
        char result[30];
        int dataLen;
        char endian = 0;
-       dataLen = param_getstr(Cmd, cmdp++, inModel);
+       dataLen = param_getstr(Cmd, cmdp++, inModel, sizeof(inModel));
        if (dataLen < 4) return 0;
-       dataLen = param_getstr(Cmd, cmdp++, inHexStr);
+       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++); 
@@ -451,3 +448,100 @@ int CmdrevengTestC(const char *Cmd){
        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;
+}
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