| 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 | #ifndef ON_DEVICE |
| 39 | |
| 40 | #include <stdio.h> |
| 41 | #include <string.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <sys/stat.h> |
| 44 | #include <stdarg.h> |
| 45 | #include "fileutils.h" |
| 46 | #include "ui.h" |
| 47 | /** |
| 48 | * @brief checks if a file exists |
| 49 | * @param filename |
| 50 | * @return |
| 51 | */ |
| 52 | int fileExists(const char *filename) { |
| 53 | |
| 54 | #ifdef _WIN32 |
| 55 | struct _stat st; |
| 56 | int result = _stat(filename, &st); |
| 57 | #else |
| 58 | struct stat st; |
| 59 | int result = stat(filename, &st); |
| 60 | #endif |
| 61 | return result == 0; |
| 62 | } |
| 63 | |
| 64 | int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen) |
| 65 | { |
| 66 | int size = sizeof(char) * (strlen(preferredName)+strlen(suffix)+10); |
| 67 | char * fileName = malloc(size); |
| 68 | |
| 69 | memset(fileName,0,size); |
| 70 | int num = 1; |
| 71 | sprintf(fileName,"%s.%s", preferredName, suffix); |
| 72 | while(fileExists(fileName)) |
| 73 | { |
| 74 | sprintf(fileName,"%s-%d.%s", preferredName, num, suffix); |
| 75 | num++; |
| 76 | } |
| 77 | /* We should have a valid filename now, e.g. dumpdata-3.bin */ |
| 78 | |
| 79 | /*Opening file for writing in binary mode*/ |
| 80 | FILE *fileHandle=fopen(fileName,"wb"); |
| 81 | if(!fileHandle) { |
| 82 | prnlog("Failed to write to file '%s'", fileName); |
| 83 | free(fileName); |
| 84 | return 1; |
| 85 | } |
| 86 | fwrite(data, 1, datalen, fileHandle); |
| 87 | fclose(fileHandle); |
| 88 | prnlog("Saved data to '%s'", fileName); |
| 89 | free(fileName); |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Utility function to print to console. This is used consistently within the library instead |
| 96 | * of printf, but it actually only calls printf (and adds a linebreak). |
| 97 | * The reason to have this method is to |
| 98 | * make it simple to plug this library into proxmark, which has this function already to |
| 99 | * write also to a logfile. When doing so, just delete this function. |
| 100 | * @param fmt |
| 101 | */ |
| 102 | void prnlog(char *fmt, ...) |
| 103 | { |
| 104 | char buffer[2048] = {0}; |
| 105 | va_list args; |
| 106 | va_start(args,fmt); |
| 107 | vsprintf (buffer,fmt, args); |
| 108 | va_end(args); |
| 109 | PrintAndLog(buffer); |
| 110 | |
| 111 | } |
| 112 | #else //if we're on ARM |
| 113 | void prnlog(char *fmt,...) |
| 114 | { |
| 115 | return; |
| 116 | } |
| 117 | |
| 118 | #endif |