diff --git a/examples/Makefile.am b/examples/Makefile.am
index fdf810a..526e9c2 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,7 +1,11 @@
AM_CFLAGS = -I. -I$(top_srcdir)/libfreefare @LIBNFC_CFLAGS@
AM_LDFLAGS = @LIBNFC_LIBS@
-bin_PROGRAMS = mifare-classic-format
+bin_PROGRAMS = mifare-classic-format \
+ mifare-classic-write-ndef
mifare_classic_format_SOURCES = mifare-classic-format.c
mifare_classic_format_LDADD = -lnfc $(top_builddir)/libfreefare/libfreefare.la
+
+mifare_classic_write_ndef_SOURCES = mifare-classic-write-ndef.c
+mifare_classic_write_ndef_LDADD = -lnfc $(top_builddir)/libfreefare/libfreefare.la
diff --git a/examples/mifare-classic-write-ndef.c b/examples/mifare-classic-write-ndef.c
new file mode 100644
index 0000000..e92efe1
--- /dev/null
+++ b/examples/mifare-classic-write-ndef.c
@@ -0,0 +1,201 @@
+/*-
+ * Copyright (C) 2010, Romain Tartiere, Romuald Conty.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see
+ *
+ * $Id$
+ */
+
+#include
+#include
+#include
+#include
+
+#include
+
+#include
+
+MifareClassicKey default_keys[] = {
+ { 0xff,0xff,0xff,0xff,0xff,0xff },
+ { 0xd3,0xf7,0xd3,0xf7,0xd3,0xf7 },
+ { 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5 },
+ { 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5 },
+ { 0x4d,0x3a,0x99,0xc3,0x51,0xdd },
+ { 0x1a,0x98,0x2c,0x7e,0x45,0x9a },
+ { 0xaa,0xbb,0xcc,0xdd,0xee,0xff },
+ { 0x00,0x00,0x00,0x00,0x00,0x00 }
+};
+
+const MifareClassicKey mad_key_a = {
+ 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5
+};
+const MifareClassicKey default_keyb = {
+ 0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7
+};
+
+int
+search_sector_key (MifareTag tag, MifareClassicBlockNumber block, MifareClassicKey *key, MifareClassicKeyType *key_type)
+{
+ for (int i = 0; i < (sizeof (default_keys) / sizeof (MifareClassicKey)); i++) {
+ if ((0 == mifare_classic_connect (tag)) && (0 == mifare_classic_authenticate (tag, block, default_keys[i], MFC_KEY_A))) {
+ if ((1 == mifare_classic_get_trailer_block_permission (tag, block + 3, MCAB_WRITE_KEYA, MFC_KEY_A)) &&
+ (1 == mifare_classic_get_trailer_block_permission (tag, block + 3, MCAB_WRITE_ACCESS_BITS, MFC_KEY_A)) &&
+ (1 == mifare_classic_get_trailer_block_permission (tag, block + 3, MCAB_WRITE_KEYB, MFC_KEY_A))) {
+ memcpy (key, &default_keys[i], sizeof (MifareClassicKey));
+ *key_type = MFC_KEY_A;
+ return 1;
+ }
+ }
+
+ if ((0 == mifare_classic_connect (tag)) && (0 == mifare_classic_authenticate (tag, block, default_keys[i], MFC_KEY_B))) {
+ if (((block == 0) || (1 == mifare_classic_get_data_block_permission (tag, block + 0, MCAB_W, MFC_KEY_B))) &&
+ (1 == mifare_classic_get_data_block_permission (tag, block + 1, MCAB_W, MFC_KEY_B)) &&
+ (1 == mifare_classic_get_data_block_permission (tag, block + 2, MCAB_W, MFC_KEY_B)) &&
+ (1 == mifare_classic_get_trailer_block_permission (tag, block + 3, MCAB_WRITE_KEYA, MFC_KEY_B)) &&
+ (1 == mifare_classic_get_trailer_block_permission (tag, block + 3, MCAB_WRITE_ACCESS_BITS, MFC_KEY_B)) &&
+ (1 == mifare_classic_get_trailer_block_permission (tag, block + 3, MCAB_WRITE_KEYB, MFC_KEY_B))) {
+ memcpy (key, &default_keys[i], sizeof (MifareClassicKey));
+ *key_type = MFC_KEY_B;
+ return 1;
+ }
+ }
+ }
+
+ warnx ("No known authentication key for block %d", block);
+ return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+ int error = 0;
+ nfc_device_t *device = NULL;
+ MifareTag *tags = NULL;
+ MifareClassicKey key_00, key_10;
+ MifareClassicKeyType key_00_type, key_10_type;
+ MifareClassicBlock block;
+ Mad mad;
+
+ (void)argc;
+ (void)argv;
+
+ device = nfc_connect (NULL);
+ if (!device)
+ errx (EXIT_FAILURE, "No NFC device found.");
+
+ tags = freefare_get_tags (device);
+ if (!tags) {
+ nfc_disconnect (device);
+ errx (EXIT_FAILURE, "Error listing MIFARE classic tag.");
+ }
+
+ for (int i = 0; (!error) && tags[i]; i++) {
+ switch (freefare_get_tag_type (tags[i])) {
+ case CLASSIC_1K:
+ case CLASSIC_4K:
+ break;
+ default:
+ continue;
+ }
+
+ char *tag_uid = freefare_get_tag_uid (tags[i]);
+ char buffer[BUFSIZ];
+
+ printf ("Found %s with UID %s. Write NDEF [yN] ", freefare_get_tag_friendly_name (tags[i]), tag_uid);
+ fgets (buffer, BUFSIZ, stdin);
+ bool write_ndef = ((buffer[0] == 'y') || (buffer[0] == 'Y'));
+
+ if (write_ndef) {
+ switch (freefare_get_tag_type (tags[i])) {
+ case CLASSIC_4K:
+ if (!search_sector_key (tags[i], 0x40, &key_10, &key_10_type)) {
+ error = 1;
+ goto error;
+ }
+ case CLASSIC_1K:
+ if (!search_sector_key (tags[i], 0x00, &key_00, &key_00_type)) {
+ error = 1;
+ goto error;
+ }
+ break;
+ default:
+ /* Keep compiler quiet */
+ break;
+ }
+
+ if (!error) {
+ /* Ensure the auth key is always a B one. If not, change it! */
+ switch (freefare_get_tag_type (tags[i])) {
+ case CLASSIC_4K:
+ if (key_10_type != MFC_KEY_B) {
+ mifare_classic_trailer_block (&block, mad_key_a, 0x0, 0x1, 0x1, 0x6, 0x00, default_keyb);
+ if (mifare_classic_authenticate (tags[i], 0x10, key_10, key_10_type) < 0) {
+ perror ("mifare_classic_authenticate");
+ error = 1;
+ goto error;
+ }
+ if (mifare_classic_write (tags[i], 0x43, block) < 0) {
+ perror ("mifare_classic_write");
+ error = 1;
+ goto error;
+ }
+ memcpy (&key_10, &default_keyb, sizeof (MifareClassicKey));
+ key_10_type = MFC_KEY_B;
+ }
+ case CLASSIC_1K:
+ if (key_00_type != MFC_KEY_B) {
+ mifare_classic_trailer_block (&block, mad_key_a, 0x0, 0x1, 0x1, 0x6, 0x00, default_keyb);
+ if (mifare_classic_authenticate (tags[i], 0x00, key_00, key_00_type) < 0) {
+ perror ("mifare_classic_authenticate");
+ error = 1;
+ goto error;
+ }
+ if (mifare_classic_write (tags[i], 0x03, block) < 0) {
+ perror ("mifare_classic_write");
+ error = 1;
+ goto error;
+ }
+ memcpy (&key_00, &default_keyb, sizeof (MifareClassicKey));
+ key_00_type = MFC_KEY_B;
+ }
+ break;
+ default:
+ /* Keep compiler quiet */
+ break;
+ }
+ }
+
+ if (!(mad = mad_new ((freefare_get_tag_type (tags[i]) == CLASSIC_4K) ? 2 : 1))) {
+ perror ("mad_new");
+ error = 1;
+ goto error;
+ }
+
+ if (mad_write (tags[i], mad, key_00, key_10) < 0) {
+ perror ("mad_write");
+ error = 1;
+ }
+
+ free (mad);
+ }
+
+error:
+ free (tag_uid);
+ }
+
+ freefare_free_tags (tags);
+ nfc_disconnect (device);
+
+ exit (error);
+}