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git.zerfleddert.de Git - proxmark3-svn/blob - client/loclass/fileutils.c
1 /*****************************************************************************
4 * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
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.
10 * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
12 *****************************************************************************
14 * This file is part of loclass. It is a reconstructon of the cipher engine
15 * used in iClass, and RFID techology.
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".
21 * Copyright (C) 2014 Martin Holst Swende
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.
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.
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/>.
37 ****************************************************************************/
45 #include "fileutils.h"
48 * @brief checks if a file exists
52 int fileExists(const char *filename
) {
56 int result
= _stat(filename
, &st
);
59 int result
= stat(filename
, &st
);
64 int saveFile(const char *preferredName
, const char *suffix
, const void* data
, size_t datalen
)
66 int size
= sizeof(char) * (strlen(preferredName
)+strlen(suffix
)+10);
67 char * fileName
= malloc(size
);
69 memset(fileName
,0,size
);
71 sprintf(fileName
,"%s.%s", preferredName
, suffix
);
72 while(fileExists(fileName
))
74 sprintf(fileName
,"%s-%d.%s", preferredName
, num
, suffix
);
77 /* We should have a valid filename now, e.g. dumpdata-3.bin */
79 /*Opening file for writing in binary mode*/
80 FILE *fileHandle
=fopen(fileName
,"wb");
82 prnlog("Failed to write to file '%s'", fileName
);
86 fwrite(data
, 1, datalen
, fileHandle
);
88 prnlog("Saved data to '%s'", fileName
);
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.
102 void prnlog(char *fmt
, ...)
104 char buffer
[2048] = {0};
107 vsprintf (buffer
,fmt
, args
);
112 #else //if we're on ARM
113 void prnlog(char *fmt
,...)