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 *

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 ****************************************************************************/

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 */

 int fileExists(const char *filename) {

53 #ifdef _WIN32

54 struct _stat st;

         int result = _stat(filename, &st);

56 #else

57 struct stat st;

         int result = stat(filename, &st);

59 #endif

60 return result == 0;

61 }

 int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen)

64 {

         int size = sizeof(char) * (strlen(preferredName)+strlen(suffix)+10);

         char * fileName = malloc(size);

         memset(fileName,0,size);

69 int num = 1;

         sprintf(fileName,"%s.%s", preferredName, suffix);

         while(fileExists(fileName))

72 {

                 sprintf(fileName,"%s-%d.%s", preferredName, num, suffix);

74 num++;

75 }

76 /* We should have a valid filename now, e.g. dumpdata-3.bin */

78 /*Opening file for writing in binary mode*/

         FILE *fileHandle=fopen(fileName,"wb");

80 if(!fileHandle) {

                 prnlog("Failed to write to file '%s'", fileName);

82 free(fileName);

83 return 1;

84 }

         fwrite(data, 1, datalen, fileHandle);

86 fclose(fileHandle);

         prnlog("Saved data to '%s'", fileName);

88 free(fileName);

90 return 0;

91 }

93 /**

94 * Utility function to print to console. This is used consistently within the library instead

95 * of printf, but it actually only calls printf (and adds a linebreak).

96 * The reason to have this method is to

97 * make it simple to plug this library into proxmark, which has this function already to

98 * write also to a logfile. When doing so, just delete this function.

99 * @param fmt

100 */

 void prnlog(char *fmt, ...)

102 {

         char buffer[2048] = {0};

104 va_list args;

105 va_start(args,fmt);

         vsprintf (buffer,fmt, args);

107 va_end(args);

108 PrintAndLog(buffer);

109

110 }