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philheath

Contributor

Registered: 2017-03-22

Posts: 4

ACR122 with Mifare 1k - Auth command to get card challenge not working

Hi everyone!

I have ACR122 and want to get card challenge (token RB) fr manual three pass authentication with card.

I checked documentation for PN532 for sending direct commands. Accordin to ACR122 dcos the pseudo apdu shpould be wrapped with FF 00 00 00.

So I sent the following command: FF 00 00 00 04 D4 4A 01 00", HEX); // InListPassiveTarget

and then

FF 00 00 00 07 D4 40 01 60 01 7C 6A // InDataExchange - authentication with key A block 01, i. e. 60 01 + CRC

but reader returned 63 00 // The operation failed

OK, I tried InCommunicateThru instead

>> FF 00 00 00 06 D4 42 60 01 7C 6A

I received

<< D5 43 01  9000

Which means "Time Out, the target has not answered" (accroding to pn532 doc)

Well, i tried to play with timeout settings (increased default):

>> FF 00 00 00 06 D4 32 02 00 0B 10

But that didn't help either.

Either reader (pn532) doesn't support sendin "get challenge" command or I'm doing something wrong (wrong command use or missing commands).

Any suggestions?

Can you somehow show me a valid trace from ACR122 with authentication without sending key in the command

(i.e D4 40 01 60 01 FF FF FF FF FF FF XX XX XX XX works ok, but this is not what is needed)

Last edited by philheath (2017-03-22 13:00:06)

iceman

Administrator

Registered: 2013-04-25

Posts: 9,537

Website

Re: ACR122 with Mifare 1k - Auth command to get card challenge not working

You do know that you are posting in a dedicated forum for Proxmark3?