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allow setting of UID for special 'chinese' ultralight cards

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This commit is contained in:
Adam Laurie 2013-08-31 16:15:27 +01:00
parent f6fff26f0f
commit 07c54cd91b
2 changed files with 17 additions and 5 deletions
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3
utils/nfc-mfultralight.1
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@ -20,6 +20,9 @@ Be cautious that some parts of a Ultralight memory can be written only once
and some parts are used as lock bits, so please read the tag documentation
before experimenting too much!
To set the UID of a special writeable UID card, edit the first 7 bytes of a dump file and
then write it back, answering 'Y' to the question 'Write UID bytes?'.
.SH OPTIONS
.BR r " | " w
Perform read from (

19
utils/nfc-mfultralight.c
View file

@ -9,6 +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) 2013 Adam Laurie
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -112,11 +113,12 @@ write_card(void)
uint32_t uiBlock = 0;
bool bFailure = false;
uint32_t uiWritenPages = 0;
uint32_t uiSkippedPages;
uint32_t uiSkippedPages = 0;
char buffer[BUFSIZ];
bool write_otp;
bool write_lock;
bool write_uid;
printf("Write OTP bytes ? [yN] ");
if (!fgets(buffer, BUFSIZ, stdin)) {
@ -128,13 +130,20 @@ write_card(void)
ERR("Unable to read standard input.");
}
write_lock = ((buffer[0] == 'y') || (buffer[0] == 'Y'));
printf("Write UID bytes (only for special writeable UID cards) ? [yN] ");
if (!fgets(buffer, BUFSIZ, stdin)) {
ERR("Unable to read standard input.");
}
write_uid = ((buffer[0] == 'y') || (buffer[0] == 'Y'));
printf("Writing %d pages |", uiBlocks + 1);
/* We need to skip 2 first pages. */
printf("ss");
uiSkippedPages = 2;
/* We may need to skip 2 first pages. */
if(!write_uid) {
printf("ss");
uiSkippedPages = 2;
}
for (int page = 0x2; page <= 0xF; page++) {
for (int page = uiSkippedPages; page <= 0xF; page++) {
if ((page == 0x2) && (!write_lock)) {
printf("s");
uiSkippedPages++;