5dc7a20c1c
mifare-classic-write-ndef.c:67: warning: no previous prototype for ‘search_sector_key’ mifare-classic-write-ndef.c:105: warning: no previous prototype for ‘fix_mad_trailer_block’
413 lines
12 KiB
C
413 lines
12 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 "config.h"
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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 <strings.h>
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#include <unistd.h>
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#include <nfc/nfc.h>
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#include <freefare.h>
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#define MIN(a,b) ((a < b) ? a: b)
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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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struct mifare_classic_key_and_type {
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MifareClassicKey key;
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MifareClassicKeyType type;
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};
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const MifareClassicKey default_keyb = {
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0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7
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};
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const uint8_t ndef_default_msg[33] = {
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0xd1, 0x02, 0x1c, 0x53, 0x70, 0x91, 0x01, 0x09,
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0x54, 0x02, 0x65, 0x6e, 0x4c, 0x69, 0x62, 0x6e,
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0x66, 0x63, 0x51, 0x01, 0x0b, 0x55, 0x03, 0x6c,
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0x69, 0x62, 0x6e, 0x66, 0x63, 0x2e, 0x6f, 0x72,
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0x67
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};
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uint8_t *ndef_msg;
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size_t ndef_msg_len;
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static int
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search_sector_key (MifareTag tag, MifareClassicSectorNumber sector, MifareClassicKey *key, MifareClassicKeyType *key_type)
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{
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MifareClassicBlockNumber block = mifare_classic_sector_last_block (sector);
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/*
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* FIXME: We should not assume that if we have full access to trailer block
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* we also have a full access to data blocks.
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*/
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mifare_classic_disconnect (tag);
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for (size_t 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 ((1 == mifare_classic_get_trailer_block_permission (tag, block, MCAB_WRITE_KEYA, MFC_KEY_A)) &&
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(1 == mifare_classic_get_trailer_block_permission (tag, block, MCAB_WRITE_ACCESS_BITS, MFC_KEY_A)) &&
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(1 == mifare_classic_get_trailer_block_permission (tag, block, MCAB_WRITE_KEYB, MFC_KEY_A))) {
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memcpy (key, &default_keys[i], sizeof (MifareClassicKey));
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*key_type = MFC_KEY_A;
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return 1;
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}
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}
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mifare_classic_disconnect (tag);
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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 ((1 == mifare_classic_get_trailer_block_permission (tag, block, MCAB_WRITE_KEYA, MFC_KEY_B)) &&
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(1 == mifare_classic_get_trailer_block_permission (tag, block, MCAB_WRITE_ACCESS_BITS, MFC_KEY_B)) &&
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(1 == mifare_classic_get_trailer_block_permission (tag, block, MCAB_WRITE_KEYB, MFC_KEY_B))) {
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memcpy (key, &default_keys[i], sizeof (MifareClassicKey));
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*key_type = MFC_KEY_B;
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return 1;
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}
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}
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mifare_classic_disconnect (tag);
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}
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warnx ("No known authentication key for sector 0x%02x\n", sector);
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return 0;
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}
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static int
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fix_mad_trailer_block (nfc_device *device, MifareTag tag, MifareClassicSectorNumber sector, MifareClassicKey key, MifareClassicKeyType key_type)
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{
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MifareClassicBlock block;
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mifare_classic_trailer_block (&block, mad_public_key_a, 0x0, 0x1, 0x1, 0x6, 0x00, default_keyb);
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if (mifare_classic_authenticate (tag, mifare_classic_sector_last_block (sector), key, key_type) < 0) {
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nfc_perror (device, "fix_mad_trailer_block mifare_classic_authenticate");
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return -1;
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}
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if (mifare_classic_write (tag, mifare_classic_sector_last_block (sector), block) < 0) {
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nfc_perror (device, "mifare_classic_write");
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return -1;
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}
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return 0;
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}
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static void
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usage(char *progname)
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{
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fprintf (stderr, "usage: %s -i FILE\n", progname);
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fprintf (stderr, "\nOptions:\n");
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fprintf (stderr, " -i Use FILE as NDEF message to write on card (\"-\" = stdin)\n");
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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 *device = NULL;
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MifareTag *tags = NULL;
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Mad mad;
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MifareClassicKey transport_key = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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int ch;
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char *ndef_input = NULL;
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while ((ch = getopt (argc, argv, "hi:")) != -1) {
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switch (ch) {
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case 'h':
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usage(argv[0]);
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exit (EXIT_SUCCESS);
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break;
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case 'i':
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ndef_input = optarg;
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break;
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case '?':
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if (optopt == 'i')
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fprintf (stderr, "Option -%c requires an argument.\n", optopt);
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default:
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usage (argv[0]);
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exit (EXIT_FAILURE);
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}
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}
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if (ndef_input == NULL) {
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ndef_msg = (uint8_t*)ndef_default_msg;
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ndef_msg_len = sizeof(ndef_default_msg);
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} else {
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FILE* ndef_stream = NULL;
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if ((strlen (ndef_input) == 1) && (ndef_input[0] == '-')) {
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// FIXME stdin as input have to be readed and buffered in ndef_msg
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ndef_stream = stdin;
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fprintf (stderr, "stdin as NDEF is not implemented");
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exit (EXIT_FAILURE);
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} else {
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ndef_stream = fopen(ndef_input, "rb");
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if (!ndef_stream) {
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fprintf (stderr, "Could not open file %s.\n", ndef_input);
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exit (EXIT_FAILURE);
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}
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fseek(ndef_stream, 0L, SEEK_END);
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ndef_msg_len = ftell(ndef_stream);
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fseek(ndef_stream, 0L, SEEK_SET);
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if (!(ndef_msg = malloc (ndef_msg_len))) {
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err (EXIT_FAILURE, "malloc");
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}
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if (fread (ndef_msg, 1, ndef_msg_len, ndef_stream) != ndef_msg_len) {
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fprintf (stderr, "Could not read NDEF from file: %s\n", ndef_input);
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fclose (ndef_stream);
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free (ndef_msg);
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exit (EXIT_FAILURE);
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}
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fclose (ndef_stream);
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}
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}
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printf ("NDEF file is %zu bytes long.\n", ndef_msg_len);
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struct mifare_classic_key_and_type *card_write_keys;
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if (!(card_write_keys = malloc (40 * sizeof (*card_write_keys)))) {
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err (EXIT_FAILURE, "malloc");
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}
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nfc_connstring devices[8];
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size_t device_count;
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nfc_init(NULL);
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device_count = nfc_list_devices (NULL, devices, 8);
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if (device_count <= 0)
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errx (EXIT_FAILURE, "No NFC device found.");
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for (size_t d = 0; d < device_count; d++) {
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device = nfc_open (NULL, devices[d]);
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if (!device) {
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warnx ("nfc_open() failed.");
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error = EXIT_FAILURE;
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continue;
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}
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tags = freefare_get_tags (device);
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if (!tags) {
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nfc_close (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 = freefare_get_tag_uid (tags[i]);
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char buffer[BUFSIZ];
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printf ("Found %s with UID %s. Write NDEF [yN] ", freefare_get_tag_friendly_name (tags[i]), tag_uid);
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fgets (buffer, BUFSIZ, stdin);
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bool write_ndef = ((buffer[0] == 'y') || (buffer[0] == 'Y'));
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for (int n = 0; n < 40; n++) {
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memcpy(card_write_keys[n].key, transport_key, sizeof (transport_key));
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card_write_keys[n].type = MFC_KEY_A;
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}
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if (write_ndef) {
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switch (freefare_get_tag_type (tags[i])) {
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case CLASSIC_4K:
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if (!search_sector_key (tags[i], 0x10, &(card_write_keys[0x10].key), &(card_write_keys[0x10].type))) {
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error = 1;
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goto error;
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}
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/* fallthrough */
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case CLASSIC_1K:
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if (!search_sector_key (tags[i], 0x00, &(card_write_keys[0x00].key), &(card_write_keys[0x00].type))) {
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error = 1;
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goto error;
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}
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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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if (!error) {
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/* Ensure the auth key is always a B one. If not, change it! */
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switch (freefare_get_tag_type (tags[i])) {
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case CLASSIC_4K:
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if (card_write_keys[0x10].type != MFC_KEY_B) {
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if( 0 != fix_mad_trailer_block (device, tags[i], 0x10, card_write_keys[0x10].key, card_write_keys[0x10].type)) {
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error = 1;
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goto error;
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}
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memcpy (&(card_write_keys[0x10].key), &default_keyb, sizeof (MifareClassicKey));
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card_write_keys[0x10].type = MFC_KEY_B;
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}
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/* fallthrough */
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case CLASSIC_1K:
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if (card_write_keys[0x00].type != MFC_KEY_B) {
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if( 0 != fix_mad_trailer_block (device, tags[i], 0x00, card_write_keys[0x00].key, card_write_keys[0x00].type)) {
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error = 1;
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goto error;
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}
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memcpy (&(card_write_keys[0x00].key), &default_keyb, sizeof (MifareClassicKey));
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card_write_keys[0x00].type = MFC_KEY_B;
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}
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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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size_t encoded_size;
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uint8_t *tlv_data = tlv_encode (3, ndef_msg, ndef_msg_len, &encoded_size);
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/*
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* At his point, we should have collected all information needed to
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* succeed.
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*/
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// If the card already has a MAD, load it.
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if ((mad = mad_read (tags[i]))) {
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// If our application already exists, erase it.
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MifareClassicSectorNumber *sectors, *p;
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sectors = p = mifare_application_find (mad, mad_nfcforum_aid);
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if (sectors) {
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while (*p) {
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if (mifare_classic_authenticate (tags[i], mifare_classic_sector_last_block(*p), default_keyb, MFC_KEY_B) < 0) {
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nfc_perror (device, "mifare_classic_authenticate");
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error = 1;
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goto error;
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}
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if (mifare_classic_format_sector (tags[i], *p) < 0) {
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nfc_perror (device, "mifare_classic_format_sector");
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error = 1;
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goto error;
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}
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p++;
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}
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}
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free (sectors);
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mifare_application_free (mad, mad_nfcforum_aid);
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} else {
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// Create a MAD and mark unaccessible sectors in the card
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if (!(mad = mad_new ((freefare_get_tag_type (tags[i]) == CLASSIC_4K) ? 2 : 1))) {
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perror ("mad_new");
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error = 1;
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goto error;
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}
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MifareClassicSectorNumber max_s;
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switch (freefare_get_tag_type (tags[i])) {
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case CLASSIC_1K:
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max_s = 15;
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break;
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case CLASSIC_4K:
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max_s = 39;
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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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// Mark unusable sectors as so
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for (size_t s = max_s; s; s--) {
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if (s == 0x10) continue;
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if (!search_sector_key (tags[i], s, &(card_write_keys[s].key), &(card_write_keys[s].type))) {
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mad_set_aid (mad, s, mad_defect_aid);
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} else if ((memcmp (card_write_keys[s].key, transport_key, sizeof (transport_key)) != 0) &&
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(card_write_keys[s].type != MFC_KEY_A)) {
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// Revert to transport configuration
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if (mifare_classic_format_sector (tags[i], s) < 0) {
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nfc_perror (device, "mifare_classic_format_sector");
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error = 1;
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goto error;
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}
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}
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}
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}
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MifareClassicSectorNumber *sectors = mifare_application_alloc (mad, mad_nfcforum_aid, encoded_size);
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if (!sectors) {
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nfc_perror (device, "mifare_application_alloc");
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error = EXIT_FAILURE;
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goto error;
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}
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if (mad_write (tags[i], mad, card_write_keys[0x00].key, card_write_keys[0x10].key) < 0) {
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nfc_perror (device, "mad_write");
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error = EXIT_FAILURE;
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goto error;
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}
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int s = 0;
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while (sectors[s]) {
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MifareClassicBlockNumber block = mifare_classic_sector_last_block (sectors[s]);
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MifareClassicBlock block_data;
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mifare_classic_trailer_block (&block_data, mifare_classic_nfcforum_public_key_a, 0x0, 0x0, 0x0, 0x6, 0x40, default_keyb);
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if (mifare_classic_authenticate (tags[i], block, card_write_keys[sectors[s]].key, card_write_keys[sectors[s]].type) < 0) {
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nfc_perror (device, "mifare_classic_authenticate");
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error = EXIT_FAILURE;
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goto error;
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}
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if (mifare_classic_write (tags[i], block, block_data) < 0) {
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nfc_perror (device, "mifare_classic_write");
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error = EXIT_FAILURE;
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goto error;
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}
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s++;
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}
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if ((ssize_t) encoded_size != mifare_application_write (tags[i], mad, mad_nfcforum_aid, tlv_data, encoded_size, default_keyb, MCAB_WRITE_KEYB)) {
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nfc_perror (device, "mifare_application_write");
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error = EXIT_FAILURE;
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goto error;
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}
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free (sectors);
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free (tlv_data);
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free (mad);
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}
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error:
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free (tag_uid);
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}
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if (ndef_msg != ndef_default_msg)
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free (ndef_msg);
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freefare_free_tags (tags);
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nfc_close (device);
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}
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free (card_write_keys);
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nfc_exit(NULL);
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exit (error);
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}
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