git.zerfleddert.de Git - proxmark3-svn/blob - client/loclass/fileutils.c

   1 /*****************************************************************************
   2  * WARNING
   3  *
   4  * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
   5  *
   6  * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
   7  * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
   8  * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
   9  *
  10  * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
  11  *
  12  *****************************************************************************
  13  *
  14  * This file is part of loclass. It is a reconstructon of the cipher engine
  15  * used in iClass, and RFID techology.
  16  *
  17  * The implementation is based on the work performed by
  18  * Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
  19  * Milosch Meriac in the paper "Dismantling IClass".
  20  *
  21  * Copyright (C) 2014 Martin Holst Swende
  22  *
  23  * This is free software: you can redistribute it and/or modify
  24  * it under the terms of the GNU General Public License version 2 as published
  25  * by the Free Software Foundation.
  26  *
  27  * This file is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with loclass.  If not, see <http://www.gnu.org/licenses/>.
  34  *
  35  *
  36  *
  37  ****************************************************************************/
  38
  39 #include <stdio.h>
  40 #include <string.h>
  41 #include <stdlib.h>
  42 #include <sys/stat.h>
  43 #include <stdarg.h>
  44 #include "fileutils.h"
  45 #include "ui.h"
  46 /**
  47  * @brief checks if a file exists
  48  * @param filename
  49  * @return
  50  */
  51 int fileExists(const char *filename) {
  52     struct stat st;
  53     int result = stat(filename, &st);
  54         return result == 0;
  55 }
  56
  57 int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen)
  58 {
  59         int size = sizeof(char) * (strlen(preferredName)+strlen(suffix)+5);
  60         char * fileName = malloc(size);
  61
  62         memset(fileName,0,size);
  63         int num = 1;
  64         sprintf(fileName,"%s.%s", preferredName, suffix);
  65         while(fileExists(fileName))
  66         {
  67                 sprintf(fileName,"%s-%d.%s", preferredName, num, suffix);
  68                 num++;
  69         }
  70         /* We should have a valid filename now, e.g. dumpdata-3.bin */
  71
  72         /*Opening file for writing in binary mode*/
  73         FILE *fileHandle=fopen(fileName,"wb");
  74         if(!fileHandle) {
  75                 prnlog("Failed to write to file '%s'", fileName);
  76                 return 1;
  77         }
  78         fwrite(data, 1, datalen, fileHandle);
  79         fclose(fileHandle);
  80         prnlog("Saved data to '%s'", fileName);
  81         free(fileName);
  82
  83         return 0;
  84 }
  85
  86 int loadFile(const char *fileName, void* data, size_t datalen)
  87 {
  88         FILE *filehandle = fopen(fileName, "rb");
  89         if(!filehandle) {
  90                 prnlog("Failed to read from file '%s'", fileName);
  91                 return 1;
  92         }
  93         fread(data,datalen,1,filehandle);
  94         fclose(filehandle);
  95         return 0;
  96 }
  97 /**
  98  * Utility function to print to console. This is used consistently within the library instead
  99  * of printf, but it actually only calls printf (and adds a linebreak).
 100  * The reason to have this method is to
 101  * make it simple to plug this library into proxmark, which has this function already to
 102  * write also to a logfile. When doing so, just delete this function.
 103  * @param fmt
 104  */
 105 void prnlog(char *fmt, ...)
 106 {
 107
 108         va_list args;
 109         va_start(args,fmt);
 110     PrintAndLog(fmt, args);
 111     //vprintf(fmt,args);
 112         va_end(args);
 113     //printf("\n");
 114 }