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add format/wipe command to nfc-mfclassic

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This commit is contained in:
Adam Laurie 2013-11-11 22:03:09 +00:00
parent 7e5257dd44
commit 250068462b
1 changed files with 39 additions and 11 deletions
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40
utils/nfc-mfclassic.c
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@ -9,7 +9,7 @@
* Copyright (C) 2012-2013 Ludovic Rousseau
* See AUTHORS file for a more comprehensive list of contributors.
* Additional contributors of this file:
* Copyright (C) 2011 Adam Laurie
* Copyright (C) 2011-2013 Adam Laurie
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -68,6 +68,7 @@ static bool bUseKeyA;
static bool bUseKeyFile;
static bool bForceKeyFile;
static bool bTolerateFailures;
static bool bFormatCard;
static bool magic2 = false;
static uint8_t uiBlocks;
static uint8_t keys[] = {
@ -81,6 +82,8 @@ static uint8_t keys[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xab, 0xcd, 0xef, 0x12, 0x34, 0x56
};
static uint8_t default_key[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
static uint8_t default_acl[] = {0xff, 0x07, 0x80, 0x69};
static const nfc_modulation nmMifare = {
.nmt = NMT_ISO14443A,
@ -204,8 +207,10 @@ authenticate(uint32_t uiBlock)
// Try to authenticate for the current sector
if (nfc_initiator_mifare_cmd(pnd, mc, uiBlock, &mp))
return true;
} else {
// Try to guess the right key
}
// If formatting or not using key file, try to guess the right key
if (bFormatCard || !bUseKeyFile) {
for (size_t key_index = 0; key_index < num_keys; key_index++) {
memcpy(mp.mpa.abtKey, keys + (key_index * 6), 6);
if (nfc_initiator_mifare_cmd(pnd, mc, uiBlock, &mp)) {
@ -407,10 +412,17 @@ write_card(int write_block_zero)
}
if (is_trailer_block(uiBlock)) {
if (bFormatCard) {
// Copy the default key and reset the access bits
memcpy(mp.mpd.abtData, default_key, 6);
memcpy(mp.mpd.abtData + 6, default_acl, 4);
memcpy(mp.mpd.abtData + 10, default_key, 6);
} else {
// Copy the keys over from our key dump and store the retrieved access bits
memcpy(mp.mpd.abtData, mtDump.amb[uiBlock].mbt.abtKeyA, 6);
memcpy(mp.mpd.abtData + 6, mtDump.amb[uiBlock].mbt.abtAccessBits, 4);
memcpy(mp.mpd.abtData + 10, mtDump.amb[uiBlock].mbt.abtKeyB, 6);
}
// Try to write the trailer
if (nfc_initiator_mifare_cmd(pnd, MC_WRITE, uiBlock, &mp) == false) {
@ -426,6 +438,9 @@ write_card(int write_block_zero)
// Make sure a earlier write did not fail
if (!bFailure) {
// Try to write the data block
if(bFormatCard && uiBlock)
memset(mp.mpd.abtData, 0x00, 16);
else
memcpy(mp.mpd.abtData, mtDump.amb[uiBlock].mbd.abtData, 16);
// do not write a block 0 with incorrect BCC - card will be made invalid!
if (uiBlock == 0) {
@ -462,14 +477,25 @@ print_usage(const char *pcProgramName)
{
printf("Usage: ");
printf("%s r|R|w|W a|b <dump.mfd> [<keys.mfd> [f]]\n", pcProgramName);
printf(" r|R|w|W - Perform read from (r) or unlocked read from (R) or write to (w) or unlocked write to (W) card\n");
printf(" *** note that unlocked write will attempt to overwrite block 0 including UID\n");
printf(" f|r|R|w|W - Perform format (f) or read from (r) or unlocked read from (R) or write to (w) or unlocked write to (W) card\n");
printf(" *** format will reset all keys to FFFFFFFFFFFF and all data to 00 and all ACLs to default\n");
printf(" *** unlocked read does not require authentication and will reveal A and B keys\n");
printf(" *** note that unlocked write will attempt to overwrite block 0 including UID\n");
printf(" *** unlocking only works with special Mifare 1K cards (Chinese clones)\n");
printf(" a|A|b|B - Use A or B keys for action; Halt on errors (a|b) or tolerate errors (A|B)\n");
printf(" <dump.mfd> - MiFare Dump (MFD) used to write (card to MFD) or (MFD to card)\n");
printf(" <keys.mfd> - MiFare Dump (MFD) that contain the keys (optional)\n");
printf(" f - Force using the keyfile even if UID does not match (optional)\n");
printf("Examples: \n\n");
printf(" Read card to file, using key A:\n\n");
printf(" %s r a mycard.mfd\n\n", pcProgramName);
printf(" Write file to blank card, using key A:\n\n");
printf(" %s w a mycard.mfd\n\n", pcProgramName);
printf(" Write new data and/or keys to previously written card, using key A:\n\n");
printf(" %s w a newdata.mfd mycard.mfd\n\n", pcProgramName);
printf(" Format/wipe card (note two passes required to ensure writes for all ACL cases):\n\n");
printf(" %s f A dummy.mfd keyfile.mfd f\n", pcProgramName);
printf(" %s f B dummy.mfd keyfile.mfd f\n\n", pcProgramName);
}
int
@ -497,7 +523,7 @@ main(int argc, const char *argv[])
bTolerateFailures = tolower((int)((unsigned char) * (argv[2]))) != (int)((unsigned char) * (argv[2]));
bUseKeyFile = (argc > 4);
bForceKeyFile = ((argc > 5) && (strcmp((char *)argv[5], "f") == 0));
} else if (strcmp(command, "w") == 0 || strcmp(command, "W") == 0) {
} else if (strcmp(command, "w") == 0 || strcmp(command, "W") == 0 || strcmp(command, "f") == 0) {
if (argc < 4) {
print_usage(argv[0]);
exit(EXIT_FAILURE);
@ -505,6 +531,8 @@ main(int argc, const char *argv[])
atAction = ACTION_WRITE;
if (strcmp(command, "W") == 0)
unlock = 1;
if (strcmp(command, "f") == 0)
bFormatCard = 1;
bUseKeyA = tolower((int)((unsigned char) * (argv[2]))) == 'a';
bTolerateFailures = tolower((int)((unsigned char) * (argv[2]))) != (int)((unsigned char) * (argv[2]));
bUseKeyFile = (argc > 4);