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#1 2020-03-24 23:00:17

loupetre
Contributor
Registered: 2019-01-21
Posts: 20

Help needed for reading trailer block (CMD_HF_MIFARE_READBL)

Hello,

I have a problem while reading trailer blocks of a mifare tag.
I use CMD_HF_MIFARE_READBL, with arguments as :
- the block number (whatever 3, 7, 11 ...)
- the key to be used (I tried 01 for key b and also 00 for key A)
- and obviously, the key (which I am sure of)

The data returned is like : 000000000000FF078069FFFFFFFFFFFF
Shoud be : FFFFFFFFFFFFFF078069FFFFFFFFFFFF

On another trailer block, I have 0000000000000F00FFFF000000000000 instead of A0A1A2A3A4A50F00FFFF415A54454B4D

I'm missing something, but I don't know what ...

Thank you !!

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#2 2020-03-24 23:20:52

loupetre
Contributor
Registered: 2019-01-21
Posts: 20

Re: Help needed for reading trailer block (CMD_HF_MIFARE_READBL)

Thanks to the admin to delete this post, which is nonsense.
According to access bytes, A key allows to read B key and so on.
Thus, it is not possible to read the entire trailer block, but only accessbytes + one of the key.

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