CODEWITHSUNDEEP
nfc
rodrigo286
rodrigo286

Reputation: 15

How correct protect NXP NTAG215 for read/write

i've an big trouble with my NTAG215 tags.

I use this PDF below for reffer:

https://www.nxp.com/docs/en/data-sheet/NTAG213_215_216.pdf

COMMANDS

commands

I send these raw commands:

AUTH TAG ( with default password )

nfc.transceive('1B FF FF FF FF')

CHANGE DEFAULT PASSWORD

nfc.transceive('A2 85 AA BB CC DD')

SET PACK

nfc.transceive('A2 86 EE FF 00 00')

PROTECT ADDRESS 04 TO 81

nfc.transceive('A2 83 04 00 00 04')

ENABLE READ/WRITE PROTECTION

nfc.transceive('A2 84 10 00 00 00')

After send these commands, i read my NTAG215, and confirm results, but...i can read all memory blocks without PWD ( 1B command ).

I need protect these memory blocks from read without correct password.

Memory blocks

Thanks for all help guys.

Upvotes: 0

Views: 1881

Answers (4)

Lubshad
Lubshad

Reputation: 1

for disabling the write protection. you need to set the AUTH0 from 00 to FF. first authenticate by

nfc.transceive('1B FF FF FF FF')

then

nfc.transceive('A2 83 04 00 00 FF')

Upvotes: 0

Hussein Ayyad
Hussein Ayyad

Reputation: 1

nfc.transceive('A2 84 80 00 00 00') after send this command now how i can disable READ/WRITE PROTECTION

Upvotes: 0

Adarsh Rotte
Adarsh Rotte

Reputation: 674

Everything looks fine except for the last command.

ENABLE READ/WRITE PROTECTION
nfc.transceive('A2 84 10 00 00 00')

In order to enable the protection the command must be as follows:

nfc.transceive('A2 84 80 00 00 00')

Upvotes: 1

Andrew
Andrew

Reputation: 10232

So once a "session" is authenticated it stays authenticated until the session ends.

So if you connect with no/default/existing password, you then have to remove the Tag from the RF field so that the session ends.

The next time the Tag enters RF fields it will need authenticating again with the new password.

Upvotes: 0

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