How do I interpret the response from GET PROCESSING OPTIONS?

Question

I'm communicating with a Visa Electron debit card via an ACR reader and I get the following response from the GET PROCESSING OPTIONS command:

80 0A 1C 00 08 01 03 00 10 01 01 00 90 00

How should I interpret this response, when there's no AFL (Application File Locator) nor any AIP (Application Interchange Profile) in it? Here's the full communication log:

SELECT PSEv2: 00 A4 04 00 0E 32 50 41 59 2E 53 59 53 2E 44 44 46 30 31 00
SELECT PSEv2 returned: 6A82 - Wrong parameter(s) P1 P2; file not found

SELECT PSEv1: 00 A4 04 00 0E 31 50 41 59 2E 53 59 53 2E 44 44 46 30 31 00
SELECT PSEv1 returned: 6A82 - Wrong parameter(s) P1 P2; file not found

SELECT ADF: 00 A4 04 00 07 A0 00 00 01 52 30 10 00
SELECT ADF returned: 6A82 - Wrong parameter(s) P1 P2; file not found

SELECT ADF: 00 A4 04 00 07 A0 00 00 00 03 10 10 00
SELECT ADF returned: 6A82 - Wrong parameter(s) P1 P2; file not found

SELECT ADF: 00 A4 04 00 07 A0 00 00 00 03 20 10 00
SELECT ADF returned: 6F 2C 84 07 A0 00 00 00 03 20 10 A5 21 50 0D 56 49 53 41 20 45 4C 45 43 54 52 4F 4E 87 01 01 5F 2D 04 62 67 65 6E BF 0C 05 9F 4D 02 0B 0A 90 00

SELECT ADF: 00 A4 04 00 05 A0 00 00 00 25 00
SELECT ADF returned: 6A82 - Wrong parameter(s) P1 P2; file not found

SELECT ADF: 00 A4 04 00 07 A0 00 00 00 04 10 10 00
SELECT ADF returned: 6A82 - Wrong parameter(s) P1 P2; file not found

SELECT ADF: 00 A4 04 00 07 A0 00 00 00 03 20 10 00
SELECT ADF returned: 6F 2C 84 07 A0 00 00 00 03 20 10 A5 21 50 0D 56 49 53 41 20 45 4C 45 43 54 52 4F 4E 87 01 01 5F 2D 04 62 67 65 6E BF 0C 05 9F 4D 02 0B 0A 90 00

GET PROCESSING OPTIONS: 80 A8 00 00 02 83 00 00
GET PROCESSING OPTIONS returned: 80 0A 1C 00 08 01 03 00 10 01 01 00 90 00

Thanks a lot!

Answer 1

EMV specification can help you about details. In the response Only Tags 0x82 and 0x94 values without tag and length parts.

In the Get Processing Option (GPO) Command response BER-TLV encoded data. In your sample: Under Tag 0x80 "Template, Response Message Format 1" packed Tag 0x82 "EMV, Application Interchange Profile (AIP)" value 2 bytes and rest is Tag 0x94 "EMV, Application File Locator (AFL)" value.

Here are results with EMV APDU command/response parser

> 80 A8 00 00 02 83 00 00
< 80 0A 1C 00 08 01 03 00 10 01 01 00 90 00

A8: # EMV, Get Processing Options
- rq:#"80A8000002830000" # ISO 7816-3, Case 4
  - CLA: "80" # Class byte
  - INS: "A8" # Instruction
  - P1P2: "0000" # Parameters 1 and 2
  - LcData:#"028300"
    - len: "02" # .
    - val:#"8300" # .
      - RFU: "8300" # Authorisation Cryptogram RFU
  - Le: "00" # .
- rs:#"800A1C0008010300100101009000" # Response
  - SW1SW2:#"9000" # Status byte 1 and 2
    - SW1: "90" # Status byte 1 // Normal processing
    - SW2: "00" # Status byte 2
  - DATA:#"800A1C000801030010010100" # .
    - x80:#"800A1C000801030010010100"
      - tag: "80"
      - len: "0A" #  // 10
      - val:#"1C000801030010010100" # Template, Response Message Format 1.
        - x82:#"1C00" # EMV, Application Interchange Profile (AIP)
          - val:#"1C00" # Application Interchange Profile (AIP).
            - B01: "1C"
              # ___1____ - bit 5, Cardholder verification is supported
              # ____1___ - bit 4, Terminal Risk Management is to be performed
              # _____1__ - bit 3, Issuer Authentication is supported
            - B02: "00" # RFU
        - x94:#"0801030010010100" # EMV, Application File Locator (AFL)
          - val:#"0801030010010100" # Application File Locator (AFL).
            - S1:#"08010300" # AFL Record
              - B01: "08" # SFI [xxxxx___] // 1
              - B02: "01" # From record // 1
              - B03: "03" # To record // 3
              - B04: "00" # First hashed
            - S2:#"10010100" # AFL Record
              - B01: "10" # SFI [xxxxx___] // 2
              - B02: "01" # From record // 1
              - B03: "01" # To record // 1
              - B04: "00" # First hashed