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Auden69

Contributor

Registered: 2020-06-23

Posts: 3

Website

Where is uid is stored ?

Hello,

I've a mifare ultralight. This tag work with a vending machine (Aztek badge)

I thought the uid was stored in the first block...

nfc-list -v
nfc-list uses libnfc 1.7.1
NFC device: ACS / ACR122U PICC Interface opened
2 ISO14443A passive target(s) found:
ISO/IEC 14443A (106 kbps) target:
    ATQA (SENS_RES): 00  44  
* UID size: double
* bit frame anticollision supported
       UID (NFCID1): 05  2b  9b  93  f7  8a  41  
      SAK (SEL_RES): 00  
* Not compliant with ISO/IEC 14443-4
* Not compliant with ISO/IEC 18092

Fingerprinting based on MIFARE type Identification Procedure:
* MIFARE Ultralight
* MIFARE Ultralight C
Other possible matches based on ATQA & SAK values:

ISO/IEC 14443A (106 kbps) target:
    ATQA (SENS_RES): 00  44  
* UID size: double
* bit frame anticollision supported
       UID (NFCID1): 04  2f  77  42  a1  35  80  
      SAK (SEL_RES): 00  
* Not compliant with ISO/IEC 14443-4
* Not compliant with ISO/IEC 18092

Fingerprinting based on MIFARE type Identification Procedure:
* MIFARE Ultralight
* MIFARE Ultralight C
Other possible matches based on ATQA & SAK values:
0 Felica (212 kbps) passive target(s) found.
0 Felica (424 kbps) passive target(s) found.
0 ISO14443B passive target(s) found.
0 ISO14443B' passive target(s) found.
0 ISO14443B-2 ST SRx passive target(s) found.
0 ISO14443B-2 ASK CTx passive target(s) found.
0 Jewel passive target(s) found.

xxd mycardUltra.mfd 
00000000: 0000 0000 0000 0000 0000 0000 e110 7e00  ..............~.
00000010: 0300 fe00 0000 0000 0000 0000 0000 0000  ................
00000020: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000030: 0000 0000 0000 0000 0000 0000 0000 0000  ................

These blocks are not modified after a paiement.. always the same content....

What am i doing wrong ?

Thx

Monster1024

Contributor

Registered: 2020-05-05

Posts: 33

Re: Where is uid is stored ?

http://www.orangetags.com/wp-content/do … F0ICU1.pdf
Page 10

Block 0 + Block 1 + Block2 (0 byte).

Last edited by Monster1024 (2020-06-24 16:21:13)