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add an accessor to UID contained in MifareClassicTag

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This commit is contained in:
Romuald Conty 2010-01-06 23:42:06 +00:00
parent fc3c23502c
commit 7d1495940f
2 changed files with 20 additions and 0 deletions
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18
mifare_classic.c
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@ -693,6 +693,24 @@ mifare_classic_format_sector (MifareClassicTag tag, const MifareSectorNumber sec
return 0;
}
/*
* UID accessor
*/
char*
mifare_classic_get_uid(MifareClassicTag tag)
{
char* uid = malloc((4 * 2) + 1);
for( uint8_t i = 0; i < 4; i++) {
unsigned char msb = (tag->info.abtUid[i] | 0xf0) >> 4;
unsigned char lsb = (tag->info.abtUid[i] | 0x0f);
uid[i] = msb < 9 ? msb + '0' : msb + 'a';
uid[i+1] = lsb < 9 ? lsb + '0' : lsb + 'a';
}
uid[8] = '\0';
return uid;
}
/*
* Generates a MIFARE trailer block.
*/