5f7f8ffe2a
- New mifare_classic_first_sector_block(), mifare_classic_last_sector_block() functions to ease detection of sectors boundaries; - New unit tests for mifare_classic_first_sector_block() and mifare_classic_last_sector_block(); - Start to update the API for consistently using blocks and not mixing blocks and sectors with mifare_classic_*() functions; - Update the mifare-classic-format(1) example to handle MIFARE Classic 1k and 4k. Many thanks to Johann Dantant from SpringCard for giving me MIFARE Classic 4k cards.
152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/*-
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* Copyright (C) 2010, Romain Tartiere, Romuald Conty.
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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* $Id$
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*/
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#include <err.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <nfc/nfc.h>
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#include <freefare.h>
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MifareClassicKey default_keys[] = {
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{ 0xff,0xff,0xff,0xff,0xff,0xff },
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{ 0xd3,0xf7,0xd3,0xf7,0xd3,0xf7 },
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{ 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5 },
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{ 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5 },
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{ 0x4d,0x3a,0x99,0xc3,0x51,0xdd },
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{ 0x1a,0x98,0x2c,0x7e,0x45,0x9a },
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{ 0xaa,0xbb,0xcc,0xdd,0xee,0xff },
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{ 0x00,0x00,0x00,0x00,0x00,0x00 }
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};
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int format_mifare_classic_1k (MifareTag tag);
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int format_mifare_classic_4k (MifareTag tag);
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int try_format_sector (MifareTag tag, MifareClassicBlockNumber block);
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int
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format_mifare_classic_1k (MifareTag tag)
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{
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for (int sector = 0; sector < 16; sector++) {
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if (!try_format_sector (tag, sector * 4))
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return 0;
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}
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return 1;
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}
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int
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format_mifare_classic_4k (MifareTag tag)
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{
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for (int sector = 0; sector < 32; sector++) {
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if (!try_format_sector (tag, sector * 4))
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return 0;
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}
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for (int sector = 0; sector < 8; sector++) {
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if (!try_format_sector (tag, 128 + sector * 16))
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return 0;
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}
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return 1;
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}
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int
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try_format_sector (MifareTag tag, MifareClassicBlockNumber block)
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{
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for (int i = 0; i < (sizeof (default_keys) / sizeof (MifareClassicKey)); i++) {
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if ((0 == mifare_classic_connect (tag)) && (0 == mifare_classic_authenticate (tag, block, default_keys[i], MFC_KEY_A))) {
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if (0 == mifare_classic_format_sector (tag, block)) {
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mifare_classic_disconnect (tag);
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return 1;
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} else if (EIO == errno) {
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err (EXIT_FAILURE, "block %d", block);
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}
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mifare_classic_disconnect (tag);
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}
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if ((0 == mifare_classic_connect (tag)) && (0 == mifare_classic_authenticate (tag, block, default_keys[i], MFC_KEY_B))) {
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if (0 == mifare_classic_format_sector (tag, block)) {
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mifare_classic_disconnect (tag);
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return 1;
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} else if (EIO == errno) {
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err (EXIT_FAILURE, "block %d", block);
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}
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mifare_classic_disconnect (tag);
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}
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}
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warnx ("No known authentication key for block %d", block);
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return 0;
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}
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int
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main(int argc, char *argv[])
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{
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int error = 0;
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nfc_device_t *device = NULL;
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MifareTag *tags = NULL;
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device = nfc_connect (NULL);
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if (!device)
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errx (EXIT_FAILURE, "No NFC device found.");
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tags = freefare_get_tags (device);
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if (!tags) {
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nfc_disconnect (device);
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errx (EXIT_FAILURE, "Error listing MIFARE classic tag.");
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}
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for (int i = 0; (!error) && tags[i]; i++) {
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switch (freefare_get_tag_type (tags[i])) {
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case CLASSIC_1K:
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case CLASSIC_4K:
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break;
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default:
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continue;
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}
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char *tag_uid = mifare_classic_get_uid (tags[i]);
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char buffer[BUFSIZ];
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printf ("Found MIFARE Classic %s. Format [yN] ", tag_uid);
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fgets (buffer, BUFSIZ, stdin);
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bool format = ((buffer[0] == 'y') || (buffer[0] == 'Y'));
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if (format) {
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switch (freefare_get_tag_type (tags[i])) {
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case CLASSIC_1K:
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if (!format_mifare_classic_1k (tags[i]))
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error = 1;
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break;
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case CLASSIC_4K:
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if (!format_mifare_classic_4k (tags[i]))
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error = 1;
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break;
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default:
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/* Keep compiler quiet */
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break;
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}
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}
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free (tag_uid);
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}
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freefare_free_tags (tags);
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nfc_disconnect (device);
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exit (error);
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}
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