298 lines
9.4 KiB
C
298 lines
9.4 KiB
C
/*-
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* Copyright (C) 2010, Audrey Diacre.
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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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#include "config.h"
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <freefare.h>
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/*
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* This example was written based on information provided by the
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* following documents:
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*
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* Mifare DESFire as Type 4 Tag
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* NFC Forum Type 4 Tag Extensions for Mifare DESFire
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* Rev. 1.1 - 21 August 2007
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* Rev. 2.2 - 4 January 2012
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*
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*/
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uint8_t key_data_app[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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// TODO: allow NDEF payload to be provided e.g. via an external file
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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 *cc_data;
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uint8_t *ndef_msg;
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size_t ndef_msg_len;
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struct {
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bool interactive;
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} write_options = {
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.interactive = true
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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, "This application writes a NDEF payload into a Mifare DESFire formatted as NFC Forum Type 4 Tag.\n");
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fprintf (stderr, "usage: %s [-y] -i FILE [-k 11223344AABBCCDD]\n", progname);
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fprintf (stderr, "\nOptions:\n");
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fprintf (stderr, " -y Do not ask for confirmation\n");
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fprintf (stderr, " -i Use FILE as NDEF message to write on card (\"-\" = stdin)\n");
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fprintf (stderr, " -k Provide another NDEF Tag Application key than the default one\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 ch;
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int error = EXIT_SUCCESS;
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nfc_device *device = NULL;
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FreefareTag *tags = NULL;
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char *ndef_input = NULL;
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while ((ch = getopt (argc, argv, "hyi:k:")) != -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 'y':
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write_options.interactive = false;
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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 'k':
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if (strlen(optarg) != 16) {
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usage(argv[0]);
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exit (EXIT_FAILURE);
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}
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uint64_t n = strtoull(optarg, NULL, 16);
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int i;
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for (i=7; i>=0; i--) {
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key_data_app[i] = (uint8_t) n;
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n >>= 8;
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}
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break;
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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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// Remaining args, if any, are in argv[optind .. (argc-1)]
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if (ndef_input == NULL) {
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ndef_msg_len = sizeof(ndef_default_msg) + 2;
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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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ndef_msg[0] = (uint8_t) ((ndef_msg_len - 2) >> 8);
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ndef_msg[1] = (uint8_t) (ndef_msg_len - 2);
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memcpy(ndef_msg + 2, ndef_default_msg, ndef_msg_len - 2);
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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) + 2;
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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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ndef_msg[0] = (uint8_t) ((ndef_msg_len - 2) >> 8);
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ndef_msg[1] = (uint8_t) (ndef_msg_len - 2);
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if (fread (ndef_msg + 2, 1, ndef_msg_len - 2, ndef_stream) != ndef_msg_len - 2) {
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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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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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nfc_connstring devices[8];
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size_t device_count;
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nfc_context *context;
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nfc_init (&context);
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if (context == NULL)
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errx(EXIT_FAILURE, "Unable to init libnfc (malloc)");
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device_count = nfc_list_devices (context, 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 (context, 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 tags.");
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}
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for (int i = 0; (!error) && tags[i]; i++) {
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if (MIFARE_DESFIRE != freefare_get_tag_type (tags[i]))
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continue;
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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. ", freefare_get_tag_friendly_name (tags[i]), tag_uid);
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bool write_ndef = true;
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if (write_options.interactive) {
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printf ("Write NDEF [yN] ");
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fgets (buffer, BUFSIZ, stdin);
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write_ndef = ((buffer[0] == 'y') || (buffer[0] == 'Y'));
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} else {
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printf ("\n");
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}
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if (write_ndef) {
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int res;
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res = mifare_desfire_connect (tags[i]);
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if (res < 0) {
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warnx ("Can't connect to Mifare DESFire target.");
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error = EXIT_FAILURE;
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break;
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}
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// We've to track DESFire version as NDEF mapping is different
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struct mifare_desfire_version_info info;
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res = mifare_desfire_get_version (tags[i], &info);
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if (res < 0) {
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freefare_perror (tags[i], "mifare_desfire_get_version");
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error = 1;
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break;
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}
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MifareDESFireKey key_app;
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key_app = mifare_desfire_des_key_new_with_version (key_data_app);
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// Mifare DESFire SelectApplication (Select application)
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MifareDESFireAID aid;
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if (info.software.version_major==0)
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aid = mifare_desfire_aid_new(0xEEEE10);
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else
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// There is no more relationship between DESFire AID and ISO AID...
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// Let's assume it's in AID 000001h as proposed in the spec
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aid = mifare_desfire_aid_new(0x000001);
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res = mifare_desfire_select_application(tags[i], aid);
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if (res < 0)
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errx (EXIT_FAILURE, "Application selection failed. Try mifare-desfire-create-ndef before running %s.", argv[0]);
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free (aid);
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// Authentication with NDEF Tag Application master key (Authentication with key 0)
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res = mifare_desfire_authenticate (tags[i], 0, key_app);
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if (res < 0)
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errx (EXIT_FAILURE, "Authentication with NDEF Tag Application master key failed");
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// Read Capability Container file E103
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uint8_t lendata[20]; // cf FIXME in mifare_desfire.c read_data()
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if (info.software.version_major==0)
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res = mifare_desfire_read_data (tags[i], 0x03, 0, 2, lendata);
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else
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// There is no more relationship between DESFire FID and ISO FileID...
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// Let's assume it's in FID 01h as proposed in the spec
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res = mifare_desfire_read_data (tags[i], 0x01, 0, 2, lendata);
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if (res < 0)
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errx (EXIT_FAILURE, "Read CC len failed");
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uint16_t cclen = (((uint16_t) lendata[0]) << 8) + ((uint16_t) lendata[1]);
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if (cclen < 15)
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errx (EXIT_FAILURE, "CC too short IMHO");
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if (!(cc_data = malloc(cclen + 20))) // cf FIXME in mifare_desfire.c read_data()
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errx (EXIT_FAILURE, "malloc");
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if (info.software.version_major==0)
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res = mifare_desfire_read_data (tags[i], 0x03, 0, cclen, cc_data);
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else
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res = mifare_desfire_read_data (tags[i], 0x01, 0, cclen, cc_data);
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if (res < 0)
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errx (EXIT_FAILURE, "Read CC data failed");
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// Search NDEF File Control TLV
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uint8_t off = 7;
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while (((off+7) < cclen) && (cc_data[off] != 0x04)) {
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// Skip TLV
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off += cc_data[off+1] + 2;
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}
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if (off+7 >= cclen)
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errx (EXIT_FAILURE, "CC does not contain expected NDEF File Control TLV");
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if (cc_data[off+2] != 0xE1)
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errx (EXIT_FAILURE, "Unknown NDEF File reference in CC");
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uint8_t file_no;
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if (info.software.version_major==0)
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file_no = cc_data[off+3];
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else
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// There is no more relationship between DESFire FID and ISO FileID...
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// Let's assume it's in FID 02h as proposed in the spec
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file_no = 2;
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uint16_t ndefmaxlen = (((uint16_t) cc_data[off+4]) << 8) + ((uint16_t) cc_data[off+5]);
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fprintf (stdout, "Max NDEF size: %i bytes\n", ndefmaxlen);
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if (ndef_msg_len > ndefmaxlen)
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errx (EXIT_FAILURE, "Supplied NDEF larger than max NDEF size");
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//Mifare DESFire WriteData to write the content of the NDEF File with NLEN equal to NDEF Message length and NDEF Message
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res = mifare_desfire_write_data(tags[i], file_no, 0, ndef_msg_len, (uint8_t *) ndef_msg);
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if (res < 0)
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errx (EXIT_FAILURE, " Write data failed");
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free(cc_data);
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mifare_desfire_key_free (key_app);
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mifare_desfire_disconnect (tags[i]);
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}
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free (tag_uid);
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}
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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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nfc_exit (context);
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exit (error);
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}
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