I am totally stumped about Issuer Scripts in EMV. I know what they are and I have read the EMV book 3. I was wondering if anyone has a good summary that tells me:
- Parse the script based on "86".
- Then based upon some values do this or that.
Thanks
Content of EMV TAG 0x86 is ready to use APDU command for the smartcard. It could be any of EMV or ISO 7816 Commands actually and should be translated to smartcard thru EMV terminal application/kernel without additional modifications.
Here are usual APDU Instructions (INS) for Issuer scripts:
- 16: EMV, Card Block
- 18: EMV, Application Unblock
- 1E: EMV, Application Block
- 24: EMV, Pin Change/Unblock
- DC: ISO 7816-4, Update Record
Please keep in mind that Message Authentication Code (MAC) data component used in the APDU Command to protect(sign) the command body.
The Commands descriptions you can find in EMV Book 3 and in the ISO 7816-4.
来源：https://stackoverflow.com/questions/34002869/what-are-the-requirements-for-issuerscripts