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I'm trying to authenticate to a MIFARE Classic card using PC/SC based APDU. I'm using a SCL3711 reader and the key A 00 00 00 00 00 03. 

>> FF 82 00 60 06 00 00 00 00 00 03
<< 90 00
>> FF 86 00 00 05 01 00 08 60 00
<< 69 84
(Check error : referenced data invalidated)

I'm sure the data stored in the corresponding sector trailer is ok, as using a native reader I'm able to read/write the value. Actually this is the way I was able to restore the key once this happened.

When using other keys like FF FF FF FF FF FF, or 01 02 03 04 05 06, or whatever "normal", everything is working as expected.

a) With valid key FF FF FF FF FF FF

>> FF 82 00 60 06 FF FF FF FF FF FF
<< 90 00
>> FF 86 00 00 05 01 00 08 60 00
<< 90 00

b) With invalid key 01 02 03 04 05 06

>> FF 82 00 60 06 01 02 03 04 05 06
<< 90 00
>> FF 86 00 00 05 01 00 08 60 00
<< 69 82

I have gone through the PC/SC specs (Part 3) and haven't found any place where they include any reference to valid or invalid keys. It is the first time I'm not able to use a key.

Any idea why this is happening?

jlanza
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  • did you check if the key was changed at all? – Felix Arnold Nov 27 '19 at 13:33
  • @MaxMustermann I was not changing the key or sector trailer at all. I was just trying to authenticate. As you can see with the valid key (example a) the authentication is succesful. However using the initial included commands I get the error mentioned (6984), which is not expected. – jlanza Nov 27 '19 at 17:18

0 Answers0