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Merge pull request #274 from marshmellow42/master
[proxmark3-svn] / client / loclass / fileutils.c
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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 ****************************************************************************/
b67f7ec3 38#ifndef ON_DEVICE
d60418a0 39
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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 */
52int fileExists(const char *filename) {
3fe4ff4f 53
54#ifdef _WIN32
55 struct _stat st;
56 int result = _stat(filename, &st);
57#else
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58 struct stat st;
59 int result = stat(filename, &st);
3fe4ff4f 60#endif
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61 return result == 0;
62}
63
64int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen)
65{
6116c796 66 int size = sizeof(char) * (strlen(preferredName)+strlen(suffix)+10);
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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) {
d60418a0 82 prnlog("Failed to write to file '%s'", fileName);
ca4714cd 83 free(fileName);
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84 return 1;
85 }
86 fwrite(data, 1, datalen, fileHandle);
87 fclose(fileHandle);
d60418a0 88 prnlog("Saved data to '%s'", fileName);
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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 */
102void prnlog(char *fmt, ...)
103{
6f101995 104 char buffer[2048] = {0};
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105 va_list args;
106 va_start(args,fmt);
6f101995 107 vsprintf (buffer,fmt, args);
3ad48540 108 va_end(args);
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109 PrintAndLog(buffer);
110
3ad48540 111}
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112#else //if we're on ARM
113void prnlog(char *fmt,...)
114{
115 return;
116}
117
118#endif
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