mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-14 13:44:49 +08:00
264 lines
6.9 KiB
C
264 lines
6.9 KiB
C
/*****************************************************************************
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* WARNING
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*
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* THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
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*
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* USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
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* PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
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* AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
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*
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* THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
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*
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*****************************************************************************
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*
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* This file is part of loclass. It is a reconstructon of the cipher engine
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* used in iClass, and RFID techology.
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*
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* The implementation is based on the work performed by
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* Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
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* Milosch Meriac in the paper "Dismantling IClass".
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*
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* Copyright (C) 2014 Martin Holst Swende
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, or, at your option, any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with loclass. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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****************************************************************************/
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#include "fileutils.h"
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#ifndef ON_DEVICE
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/**
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* @brief checks if a file exists
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* @param filename
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* @return
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*/
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int fileExists(const char *filename) {
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#ifdef _WIN32
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struct _stat st;
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int result = _stat(filename, &st);
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#else
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struct stat st;
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int result = stat(filename, &st);
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#endif
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return result == 0;
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}
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int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen) {
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int size = sizeof(char) * (strlen(preferredName) + strlen(suffix) + 10);
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char * fileName = calloc(size, sizeof(char));
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int num = 1;
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sprintf(fileName,"%s.%s", preferredName, suffix);
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while (fileExists(fileName)) {
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sprintf(fileName,"%s-%d.%s", preferredName, num, suffix);
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num++;
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}
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/* We should have a valid filename now, e.g. dumpdata-3.bin */
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/*Opening file for writing in binary mode*/
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FILE *f = fopen(fileName, "wb");
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if (!f) {
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PrintAndLogDevice(WARNING, "file not found or locked. '%s'", fileName);
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free(fileName);
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return 1;
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}
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fwrite(data, 1, datalen, f);
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fflush(f);
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fclose(f);
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PrintAndLogDevice(SUCCESS, "saved %u bytes to binary file %s", datalen, fileName);
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free(fileName);
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return 0;
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}
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int saveFileEML(const char *preferredName, const char *suffix, uint8_t* data, size_t datalen, size_t blocksize) {
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if ( preferredName == NULL ) return 1;
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if ( suffix == NULL ) return 1;
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if ( data == NULL ) return 1;
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int retval = 0;
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int blocks = datalen/blocksize;
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uint16_t currblock = 1;
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int i,j;
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int size = sizeof(char) * (strlen(preferredName) + strlen(suffix) + 10);
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char * fileName = calloc(size, sizeof(char));
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int num = 1;
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sprintf(fileName,"%s.%s", preferredName, suffix);
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while (fileExists(fileName)) {
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sprintf(fileName,"%s-%d.%s", preferredName, num, suffix);
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num++;
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}
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/* We should have a valid filename now, e.g. dumpdata-3.bin */
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/*Opening file for writing in text mode*/
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FILE *f = fopen(fileName, "w+");
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if (!f) {
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PrintAndLogDevice(WARNING, "file not found or locked. '%s'", fileName);
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retval = 1;
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goto out;
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}
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for (i = 0; i < datalen; i++) {
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fprintf(f, "%02X", data[i] );
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// no extra line in the end
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if ( (i+1) % blocksize == 0 && currblock != blocks ) {
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fprintf(f, "\n");
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currblock++;
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}
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}
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// left overs
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if ( datalen % blocksize != 0) {
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int index = blocks * blocksize;
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for (j = 0; j < datalen % blocksize; j++) {
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fprintf(f, "%02X", data[index + j] );
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}
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}
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fflush(f);
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fclose(f);
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PrintAndLogDevice(SUCCESS, "saved %d blocks to text file %s", blocks, fileName);
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out:
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free(fileName);
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return retval;
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}
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int saveFileJSON(const char *preferredName, const char *suffix, uint8_t* data, size_t datalen) {
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//stub - for merlokk ;)
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return 1;
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}
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int loadFile(const char *preferredName, const char *suffix, void* data, size_t* datalen) {
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if ( preferredName == NULL ) return 1;
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if ( suffix == NULL ) return 1;
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int retval = 0;
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int size = sizeof(char) * (strlen(preferredName) + strlen(suffix) + 10);
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char * fileName = calloc(size, sizeof(char));
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sprintf(fileName,"%s.%s", preferredName, suffix);
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FILE *f = fopen(fileName, "rb");
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if ( !f ) {
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PrintAndLogDevice(FAILED, "file: %s: not found or locked.", fileName);
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retval = 1;
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goto out;
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}
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// get filesize in order to malloc memory
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fseek(f, 0, SEEK_END);
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long fsize = ftell(f);
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fseek(f, 0, SEEK_SET);
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if ( fsize < 0 ) {
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PrintAndLogDevice(FAILED, "error, when getting filesize");
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retval = 1;
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goto out;
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}
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uint8_t *dump = calloc(fsize, sizeof(uint8_t));
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if ( !dump ) {
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PrintAndLogDevice(FAILED, "error, cannot allocate memory");
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retval = 2;
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goto out;
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}
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size_t bytes_read = fread(dump, 1, fsize, f);
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if ( bytes_read != fsize ) {
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PrintAndLogDevice(FAILED, "error, bytes read mismatch file size");
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free(dump);
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retval = 3;
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goto out;
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}
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if ( (data) == NULL) {
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(data) = calloc( bytes_read, sizeof(uint8_t));
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}
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memcpy( (data), dump, bytes_read);
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free(dump);
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PrintAndLogDevice(SUCCESS, "loaded %d bytes from binary file %s", bytes_read, fileName);
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*datalen = bytes_read;
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out:
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fclose(f);
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free(fileName);
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return retval;
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}
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int loadFileEML(const char *preferredName, const char *suffix, void* data, size_t* datalen) {
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if ( preferredName == NULL ) return 1;
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if ( suffix == NULL ) return 1;
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size_t counter = 0;
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int retval = 0, hexlen = 0;
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int size = sizeof(char) * (strlen(preferredName) + strlen(suffix) + 10);
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char * fileName = calloc(size, sizeof(char));
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sprintf(fileName,"%s.%s", preferredName, suffix);
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FILE *f = fopen(fileName, "r");
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if ( !f ) {
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PrintAndLogDevice(FAILED, "file: %s: not found or locked.", fileName);
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retval = 1;
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goto out;
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}
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// 128 + 2 newline chars + 1 null terminator
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char line[131];
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memset(line, 0, sizeof(line));
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uint8_t buf[64] = {0x00};
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while ( !feof(f) ) {
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memset(line, 0, sizeof(line));
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if (fgets(line, sizeof(line), f) == NULL){
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fclose(f);
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PrintAndLogEx(FAILED, "File reading error.");
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retval = 2;
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goto out;
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}
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if ( line[0] == '#' )
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continue;
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int res = param_gethex_to_eol(line, 0, buf, sizeof(buf), &hexlen);
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if (res == 0 || res == 1) {
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memcpy(data + counter, buf, hexlen);
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counter += hexlen;
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}
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}
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fclose(f);
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PrintAndLogDevice(SUCCESS, "loaded %d bytes from text file %s", counter, fileName);
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*datalen = counter;
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out:
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free(fileName);
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return retval;
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}
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int loadFileJSON(const char *preferredName, const char *suffix, void* data, size_t* datalen) {
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//stub - for merlokk ;)
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datalen = 0;
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return 1;
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}
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#else //if we're on ARM
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#endif
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