NXP 424 - difficulty in perso.

TomaszO — Fri, 10 Nov 2023 09:56:17 GMT

Hi.

We are trying to personalise NTAG424 tags following the data from AN12196 document. Currently having difficulty with writing the NDEF file using the example data (Section 6.8.2) (but with card derived keys). The following APDU log shows that we are getting a 91BE SW on WRITE file:

--> 00A4040C07D276000085010100
<-- 9000
--> FFCA000000
<-- 044E6BE2386B809000
--> 00A4040C07D276000085010100
<-- 9000
--> 00A4000002E103
<-- 9000
--> 00B00002
<-- 20010000FF0406E104010000000506E105008082830000000000000000009000
--> 00A4000002E104
<-- 9000
--> 00B0000002
<-- 421C9000
--> 00B000001E
<-- 421C73A27D827658AF481FDFF20A5025B559D0E3AA21E58D347F343CFFC79000
--> 00A4000002E105
<-- 9000
--> 00B0000002
<-- 6982
--> 00A4040C07D276000085010100
--> 90F50000010200
--> 9060000000
--> 90AF000000
--> 90AF000000
--> 9071000002000000
<-- A5BA8EE0E51F75A3CE82317CC9F397B591AF
--> 90AF00002035C3E05A752E0144BAC0DE51C1F22C566DBF01EF4F4B73FA81A707845219690000
<-- 47989741C5FB3F780C3E6D5314C3BD67A3A68CE060CF5980494320D30D75DBF79100
--> 908D0000A01C0644020000008000008F850DBF40FDCF52D828779C6B39422D1AD631216775E80AB87C4208C7006CEE5CDF448B3DDF9D736AC352EC3C21E58953B37F9285E36841FE0BFC90E6EA84A08A6768F2AC8DCB7B8E686CA1D44A510D54EF184E9B2097926CE783AC7134C67D9AC6267BDD7AD5156FF63D18046DB12BE7196EA97AC9F8FE6B9DEEC9190902ED393738F351BE7DED0A15B0F6CA414D9850759D584C34B55900
--> 91BE

The session keys were derived as:

ENC_SESSION_KEY = 78EE9EA87E59F1210693EFC4A9AA0FBC

CMAC_SESSION_KEY = 42CB1798A4F3F7A540F7D057CE029EDC

The Status word indicates 'Attempt to write beyond the file boundary as set during
creation' (NXP-NT4H2421Gx.pdf)

Any help welcome,

Tomasz

Re: NXP 424 - difficulty in perso.

Julián_AragónM — Fri, 10 Nov 2023 19:24:27 GMT

Hi @TomaszO,

Firstly, could you please share the reader you are using in your proyect? Also, please confirm if you are using RFIDDiscover for configuring the tags?

I will try to test your configuration and will get back to you with the results as soon as possible.

Best regards,
Julián

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NXP 424 - difficulty in perso.

Re: NXP 424 - difficulty in perso.