AES authenticating DesFire EV1

[Morten Sabinsky]

Hi

I am trying to perform AES authentication on a new DesFire EV1 card. I am using ISO 7816 commands but I do not get very far.

My flow is:
Selecting PIC application
Transmit: 0x90, 0x5A, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00
Receive: 0x91, 0x00
Application selected successful - This seem to work


Initializing AES authentication with master key
Transmit: 0x90, 0xAA, 0x00, 0x00, 0x01, 0x00, 0x00
Response: 0x91, 0xAE

Current authentication status does not allow the requested command - Why am I getting an authentication error when trying to start authentication. Excepted an encrypted random number at this stage.

What am i missing?

Morten

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[TapLinx Support]

Hi Morton,

If it is a blank new card, you used the wrong cipher. The default cipher is 2K3DES, not AES. You must change the cipher to AES if you want to use it (what is recommended).

The TapLinx team

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[Morten Sabinsky]

Thanks it will try that

Morten

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