Update the mifare-classic-format example.
This commit is contained in:
Romain Tartiere
parent
d8b0a18752
commit
935ab47c54
2 changed files with 79 additions and 180 deletions
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@ -1,4 +1,4 @@
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AM_CFLAGS = -I. @LIBNFC_CFLAGS@
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AM_CFLAGS = -I. -I$(top_builddir)/libfreefare @LIBNFC_CFLAGS@
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AM_LDFLAGS = @LIBNFC_LIBS@
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bin_PROGRAMS = mifare-classic-format
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@ -1,200 +1,99 @@
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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 <err.h>
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#include <nfc/nfc.h>
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#include <freefare.h>
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#define DEBUG
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#define block_address(sector, block) ((sector * 4) + block)
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// Useful macros
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#ifdef DEBUG
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// #define DBG(x, args...) printf("DBG %s:%d: " x "\n", __FILE__, __LINE__,## args )
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#define DBG(x, ...) fprintf(stderr, "DBG %s:%d: " x "\n", __FILE__, __LINE__, ## __VA_ARGS__ )
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#else
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#define DBG(...) do {} while (0)
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#endif
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static nfc_device_t *device = NULL;
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static MifareClassicTag *tags = NULL;
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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
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mifare_classic_setup (MifareClassicTag *tag)
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try_format_sector (MifareClassicTag tag, MifareSectorNumber sector)
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{
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int res = 0;
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for (int i = 0; i < (sizeof (default_keys) / sizeof (MifareClassicKey)); i++) {
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printf (" s=%d i=%d \n", sector, i);
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if ((0 == mifare_classic_connect (tag)) && (0 == mifare_classic_authenticate (tag, block_address (sector, 0), default_keys[i], MFC_KEY_A))) {
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if (0 == mifare_classic_format_sector (tag, sector)) {
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mifare_classic_disconnect (tag);
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return 0;
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} else if (EIO == errno) {
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err (EXIT_FAILURE, "sector %d", sector);
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}
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mifare_classic_disconnect (tag);
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}
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*tag = NULL;
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if ((0 == mifare_classic_connect (tag)) && (0 == mifare_classic_authenticate (tag, block_address (sector, 0), default_keys[i], MFC_KEY_B))) {
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if (0 == mifare_classic_format_sector (tag, sector)) {
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mifare_classic_disconnect (tag);
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return 0;
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} else if (EIO == errno) {
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err (EXIT_FAILURE, "sector %d", sector);
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}
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mifare_classic_disconnect (tag);
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}
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}
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return -1;
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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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MifareClassicTag *tags = NULL;
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MifareClassicTag *tag = NULL;
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device = nfc_connect (NULL);
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if (!device)
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res = -1;
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errx (EXIT_FAILURE, "No NFC device found.");
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if (0 == res) {
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tags = mifare_classic_get_tags (device);
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if (!tags) {
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nfc_disconnect (device);
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device = NULL;
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res = -2;
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tags = mifare_classic_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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if (!tags[0]) {
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mifare_classic_free_tags (tags);
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nfc_disconnect (device);
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errx (EXIT_FAILURE, "No MIFARE classic tag on NFC device.");
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}
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tag = tags;
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while (*tag) {
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char *tag_uid = mifare_classic_get_uid (*tag);
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/* FIXME get the tag size */
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size_t sector_count = 15;
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for (size_t n = 0; n < sector_count; n++) {
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if (try_format_sector (*tag, n) < 0) {
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warnx ("%s: Can't format sector %d (0x%02x)", tag_uid, n, n);
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error = 1;
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}
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}
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free(tag_uid);
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tag++;
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}
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if (0 == res) {
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if (!tags[0]) {
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mifare_classic_free_tags (tags);
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tags = NULL;
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nfc_disconnect (device);
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device = NULL;
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res = -4;
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}
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}
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mifare_classic_free_tags (tags);
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nfc_disconnect (device);
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if (0 == res) {
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*tag = tags[0];
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res = mifare_classic_connect (*tag);
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if (res != 0) {
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mifare_classic_disconnect (*tag);
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nfc_disconnect (device);
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*tag = NULL;
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device = NULL;
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res = -3;
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}
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}
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return res;
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exit (error);
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}
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int
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mifare_classic_teardown (MifareClassicTag tag)
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{
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int res;
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if (tag)
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res = mifare_classic_disconnect (tag);
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if (0 == res) {
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if (tags)
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mifare_classic_free_tags (tags);
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if (device)
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nfc_disconnect (device);
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}
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return res;
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}
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void
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print_block(MifareClassicBlock *data)
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{
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for(size_t n=0;n<sizeof(MifareClassicBlock);n++) {
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printf("0x%02x ", (*data)[n]);
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}
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}
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#define block(s,b) ((s * 4) + b)
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bool
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sector_is_empty(MifareClassicTag tag, MifareSectorNumber sector)
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{
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MifareClassicKey default_key = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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if( 0 != mifare_classic_authenticate(tag, block(sector, 0), default_key, MFC_KEY_A) ) {
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mifare_classic_connect(tag);
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DBG("%s", "Unable to authenticate using default key A.");
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return false;
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}
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MifareClassicBlock default_block = {
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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};
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MifareClassicBlock block;
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if( 0 != mifare_classic_read(tag, block(sector, 1), &block) ) {
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DBG("Unable to read block %d of sector %d (%02x).", 1, sector, block(sector, 1));
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return false;
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}
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if( 0 != memcmp( &block, &default_block, sizeof(MifareClassicBlock))) {
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DBG("Block %d of sector %d (%02x) doesn't match with default data.", 1, sector, block(sector, 1));
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return false;
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}
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if( 0 != mifare_classic_read(tag, block(sector, 2), &block) ) {
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DBG("Unable to read block %d of sector %d (%02x).", 2, sector, block(sector, 2));
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return false;
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}
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if( 0 != memcmp( &block, &default_block, sizeof(MifareClassicBlock))) {
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DBG("Block %d of sector %d (%02x) doesn't match with default data.", 2, sector, block(sector, 2));
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return false;
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}
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if( 0 != mifare_classic_read(tag, block(sector, 3), &block) ) {
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DBG("Unable to read block %d of sector %d (%02x).", 3, sector, block(sector, 3));
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return false;
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}
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MifareClassicBlock default_trailer_block = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Key A could not be read */
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0xff, 0x07, 0x80, /* Default access bits */
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0x69, /* Default GPB */
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* Default Key B */
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};
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if( 0 != memcmp( &block, &default_trailer_block, sizeof(MifareClassicBlock))) {
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DBG("Block %d of sector %d (%02x) doesn't match with default data.", 3, sector, block(sector, 3));
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printf("attemped data = "); print_block(&default_trailer_block); printf("\n");
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printf("tag data = "); print_block(&block); printf("\n");
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return false;
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}
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return true;
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}
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int main(int argc, char *argv[])
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{
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MifareClassicTag tag;
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if( 0 == mifare_classic_setup(&tag) ) {
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for(MifareSectorNumber s = 0; s < 16; s++) {
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printf("Sector %d is %s empty.\n", s, sector_is_empty(tag, s) ? "" : "_not_");
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}
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#if 0
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MifareClassicKey key_b = { 0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7 };
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/*
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if( 0 != mifare_classic_authenticate(tag, 0x04, key_b, MFC_KEY_B) ) {
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errx(1, "Unable to authenticate.");
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}
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mifare_classic_format_sector(tag, 0x04);
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if( 0 != mifare_classic_authenticate(tag, 0x08, key_b, MFC_KEY_B) ) {
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errx(1, "Unable to authenticate.");
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}
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mifare_classic_format_sector(tag, 0x08);
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*/
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if( 0 != mifare_classic_authenticate(tag, 0x08 + 4, key_b, MFC_KEY_B) ) {
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errx(1, "Unable to authenticate.");
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}
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mifare_classic_format_sector(tag, 0x08 + 4);
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/*
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if( 0 != mifare_classic_authenticate(tag, 0x00, key_b, MFC_KEY_B) ) {
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errx(1, "Unable to authenticate.");
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}
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if( 0 != mifare_classic_write(tag, 0x01, empty) )
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errx(1, "Unable to write on block @0x01");
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if( 0 != mifare_classic_write(tag, 0x02, empty) )
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errx(1, "Unable to write on block @0x02");
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if( 0 != mifare_classic_write(tag, 0x03, trailer) )
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errx(1, "Unable to write trailer block");
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*/
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#endif
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mifare_classic_teardown(tag);
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exit(EXIT_SUCCESS);
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} else {
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errx(1, "Unable to connect to a MIFARE Classic tag.");
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}
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}
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