CODEWITHSUNDEEP
smartcardsmartcard-readercontactless-smartcard
Ebrahim Ghasemi
Ebrahim Ghasemi

Reputation: 6116

Two readers have different response to GET DATA command

I have two smart card readers connected to my computer :

  1. ACS ACR122U contactless reader
  2. CRT-603-CZ1 contactless reader

I read the manual of both readers. As mentioned in the manuals, both use the following APDU commands for GET DATA APDU commands :

CLA  | INS  |     P1    |  P2  |  Le
0xFF | 0xCA | 0x00/0x01 | 0x00 | 0x00

P1 = 0x00 --> UID will return.
P1 = 0x01 --> ATS or Historical Byte of ATS will return.

Well, I put an ISO14443 (Maybe Mifare) card in the field of ACR122U reader first and then in the field of CRT-603-CZ1 and I tried above commands:

OSC:> OSC.exe -r "ACS ACR122 0" -s FFCA000000
Failed to connect to card: Card is invalid or cannot be handled

OSC:> OSC.exe -r "ACS ACR122 0" -s FFCA010000
Failed to connect to card: Card is invalid or cannot be handled

OSC:> OSC.exe -r "CREATOR CRT-603 (CZ1) CCR RF 0" -s FFCA000000
Sending: FF CA 00 00 00
Received (SW1=0x00, SW2=0x00):
FF 16 7F 29 ...)

OSC:> OSC.exe -r "CREATOR CRT-603 (CZ1) CCR RF 0" -s FFCA010000
Sending: FF CA 01 00 00
Received (SW1=0x90, SW2=0x00)

As you see above, the results are different. Actually ACR122U can't return the ATS and UID of this card.

Well, I repeat the above step with a JCOPv2.4.2r3 card:

OSC:> OSC.exe -r "ACS ACR122 0" -s FFCA000000
Sending: FF CA 00 00 00
Received (SW1=0x90, SW2=0x00):
EF B6 09 2E ....

OSC:> OSC.exe -r "ACS ACR122 0" -s FFCA010000
Sending: FF CA 01 00 00
Received (SW1=0x90, SW2=0x00):
0E 78 F7 B1 02 4A 43 4F 50 32 34 32 52 33 .x...JCOP242R3

OSC:> OSC.exe -r "CREATOR CRT-603 (CZ1) CCR RF 0" -s FFCA000000
Sending: FF CA 00 00 00
Received (SW1=0x00, SW2=0x00):
EF B6 09 2E ....

OSC:> OSC.exe -r "CREATOR CRT-603 (CZ1) CCR RF 0" -s FFCA010000
Sending: FF CA 01 00 00
Received (SW1=0x90, SW2=0x00):
4A 43 4F 50 32 34 32 52 33 00 JCOP242R3.

And as you see, both returns almost the same result.

Can anybody help me to understand why I receive different results for the first card?

Note that OCS.exe is execution file of OpenSC-Tool

Upvotes: 0

Views: 1156

Answers (1)

guidot
guidot

Reputation: 5333

You are addressing the respective reader, not the card, so differences are likely.

My assumption is, that your first card, while supporting ISO 14443 is not a type A card and therefore has no ATS. It might worth to check, whether the reader supports type B at all and how the ATQB would be retrieved for a type B card.

Upvotes: 0

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