mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-21 07:46:12 +08:00
530 lines
16 KiB
C
530 lines
16 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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#define PATH_MAX_LENGTH 100
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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. '" _YELLOW_("%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 " _YELLOW_("%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. '" _YELLOW_("%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 " _YELLOW_("%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, JSONFileType ftype, uint8_t *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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if (data == 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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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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json_t *root = json_object();
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JsonSaveStr(root, "Created", "proxmark3");
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switch (ftype) {
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case jsfRaw:
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JsonSaveStr(root, "FileType", "raw");
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JsonSaveBufAsHexCompact(root, "raw", data, datalen);
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break;
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case jsfCardMemory:
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JsonSaveStr(root, "FileType", "mfcard");
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for (int i = 0; i < (datalen / 16); i++) {
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char path[PATH_MAX_LENGTH] = {0};
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sprintf(path, "$.blocks.%d", i);
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JsonSaveBufAsHexCompact(root, path, &data[i * 16], 16);
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if (i == 0) {
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JsonSaveBufAsHexCompact(root, "$.Card.UID", &data[0], 4);
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JsonSaveBufAsHexCompact(root, "$.Card.SAK", &data[5], 1);
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JsonSaveBufAsHexCompact(root, "$.Card.ATQA", &data[6], 2);
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}
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if (mfIsSectorTrailer(i)) {
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.KeyA", mfSectorNum(i));
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JsonSaveBufAsHexCompact(root, path, &data[i * 16], 6);
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.KeyB", mfSectorNum(i));
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JsonSaveBufAsHexCompact(root, path, &data[i * 16 + 10], 6);
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memset(path, 0x00, sizeof(path));
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uint8_t *adata = &data[i * 16 + 6];
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sprintf(path, "$.SectorKeys.%d.AccessConditions", mfSectorNum(i));
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JsonSaveBufAsHexCompact(root, path, &data[i * 16 + 6], 4);
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.AccessConditionsText.block%d", mfSectorNum(i), i - 3);
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JsonSaveStr(root, path, mfGetAccessConditionsDesc(0, adata));
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.AccessConditionsText.block%d", mfSectorNum(i), i - 2);
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JsonSaveStr(root, path, mfGetAccessConditionsDesc(1, adata));
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.AccessConditionsText.block%d", mfSectorNum(i), i - 1);
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JsonSaveStr(root, path, mfGetAccessConditionsDesc(2, adata));
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.AccessConditionsText.block%d", mfSectorNum(i), i);
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JsonSaveStr(root, path, mfGetAccessConditionsDesc(3, adata));
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memset(path, 0x00, sizeof(path));
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sprintf(path, "$.SectorKeys.%d.AccessConditionsText.UserData", mfSectorNum(i));
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JsonSaveBufAsHexCompact(root, path, &adata[3], 1);
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}
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}
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break;
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case jsfMfuMemory:
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JsonSaveStr(root, "FileType", "mfu");
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mfu_dump_t *tmp = (mfu_dump_t *)data;
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uint8_t uid[7] = {0};
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memcpy(uid, tmp->data, 3);
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memcpy(uid + 3, tmp->data + 4, 4);
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JsonSaveBufAsHexCompact(root, "$.Card.UID", uid, sizeof(uid));
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JsonSaveBufAsHexCompact(root, "$.Card.Version", tmp->version, sizeof(tmp->version));
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JsonSaveBufAsHexCompact(root, "$.Card.TBO_0", tmp->tbo, sizeof(tmp->tbo));
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JsonSaveBufAsHexCompact(root, "$.Card.Tearing", tmp->tearing, sizeof(tmp->tearing));
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JsonSaveBufAsHexCompact(root, "$.Card.Pack", tmp->pack, sizeof(tmp->pack));
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JsonSaveBufAsHexCompact(root, "$.Card.TBO_1", tmp->tbo1, sizeof(tmp->tbo1));
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JsonSaveBufAsHexCompact(root, "$.Card.Signature", tmp->signature, sizeof(tmp->signature));
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JsonSaveStr(root, "$.Card.Counter", "N/A");
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// size of header 48b
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size_t len = (datalen - DUMP_PREFIX_LENGTH) / 4;
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for (int i = 0; i < len; i++) {
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char path[PATH_MAX_LENGTH] = {0};
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sprintf(path, "$.blocks.%d", i);
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JsonSaveBufAsHexCompact(root, path, tmp->data + (i * 4), 4);
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}
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break;
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}
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int res = json_dump_file(root, fileName, JSON_INDENT(2));
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if (res) {
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PrintAndLogDevice(FAILED, "error: can't save the file: " _YELLOW_("%s"), fileName);
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json_decref(root);
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retval = 200;
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goto out;
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}
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PrintAndLogDevice(SUCCESS, "saved to json file " _YELLOW_("%s"), fileName);
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json_decref(root);
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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 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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if (data == 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(WARNING, "file not found or locked. '" _YELLOW_("%s")"'", fileName);
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free(fileName);
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return 1;
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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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memcpy((data), dump, bytes_read);
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free(dump);
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PrintAndLogDevice(SUCCESS, "loaded %d bytes from binary file " _YELLOW_("%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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if (data == 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(WARNING, "file not found or locked. '" _YELLOW_("%s")"'", 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 " _YELLOW_("%s"), counter, fileName);
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if (datalen)
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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 maxdatalen, 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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if (data == NULL) return 1;
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*datalen = 0;
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json_t *root;
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json_error_t error;
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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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root = json_load_file(fileName, 0, &error);
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if (!root) {
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PrintAndLog("ERROR: json " _YELLOW_("%s") " error on line %d: %s", fileName, error.line, error.text);
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retval = 2;
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goto out;
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}
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if (!json_is_object(root)) {
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PrintAndLog("ERROR: Invalid json " _YELLOW_("%s") " format. root must be an object.", fileName);
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retval = 3;
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goto out;
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}
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uint8_t *udata = (uint8_t *)data;
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char ctype[100] = {0};
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JsonLoadStr(root, "$.FileType", ctype);
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if (!strcmp(ctype, "raw")) {
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JsonLoadBufAsHex(root, "$.raw", udata, maxdatalen, datalen);
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}
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if (!strcmp(ctype, "mfcard")) {
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size_t sptr = 0;
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for (int i = 0; i < 256; i++) {
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if (sptr + 16 > maxdatalen) {
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retval = 5;
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goto out;
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}
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char path[30] = {0};
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sprintf(path, "$.blocks.%d", i);
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size_t len = 0;
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JsonLoadBufAsHex(root, path, &udata[sptr], 16, &len);
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if (!len)
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break;
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sptr += len;
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}
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*datalen = sptr;
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}
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if (!strcmp(ctype, "mfu")) {
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size_t sptr = 0;
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for (int i = 0; i < 256; i++) {
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if (sptr + 4 > maxdatalen) {
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retval = 5;
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goto out;
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}
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char path[30] = {0};
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sprintf(path, "$.blocks.%d", i);
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size_t len = 0;
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JsonLoadBufAsHex(root, path, &udata[sptr], 4, &len);
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if (!len)
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break;
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sptr += len;
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}
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*datalen = sptr;
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}
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PrintAndLog("loaded from JSON file " _YELLOW_("%s"), fileName);
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out:
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json_decref(root);
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free(fileName);
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return retval;
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}
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int loadFileDICTIONARY(const char *preferredName, const char *suffix, void *data, size_t *datalen, uint8_t keylen, uint16_t *keycnt) {
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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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// t5577 == 4bytes
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// mifare == 6 bytes
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// iclass == 8 bytes
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// default to 6 bytes.
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if (keylen != 4 && keylen != 6 && keylen != 8) {
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keylen = 6;
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}
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// double up since its chars
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keylen <<= 1;
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char line[255];
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size_t counter = 0;
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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, "r");
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if (!f) {
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PrintAndLogDevice(WARNING, "file not found or locked. '" _YELLOW_("%s")"'", fileName);
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retval = 1;
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goto out;
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}
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|
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// read file
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while (fgets(line, sizeof(line), f)) {
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// add null terminator
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line[keylen] = 0;
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|
|
// smaller keys than expected is skipped
|
|
if (strlen(line) < keylen)
|
|
continue;
|
|
|
|
|
|
// The line start with # is comment, skip
|
|
if (line[0] == '#')
|
|
continue;
|
|
|
|
if (!isxdigit(line[0])) {
|
|
PrintAndLogEx(FAILED, "file content error. '%s' must include " _BLUE_("%2d") "HEX symbols", line, keylen);
|
|
continue;
|
|
}
|
|
|
|
uint64_t key = strtoull(line, NULL, 16);
|
|
|
|
num_to_bytes(key, keylen >> 1, data + counter);
|
|
(*keycnt)++;
|
|
memset(line, 0, sizeof(line));
|
|
counter += (keylen >> 1);
|
|
}
|
|
fclose(f);
|
|
PrintAndLogDevice(SUCCESS, "loaded " _GREEN_("%2d") "keys from dictionary file " _YELLOW_("%s"), *keycnt, fileName);
|
|
|
|
if (datalen)
|
|
*datalen = counter;
|
|
out:
|
|
free(fileName);
|
|
return retval;
|
|
}
|
|
|
|
#else //if we're on ARM
|
|
|
|
#endif
|