[Opensc-devel] iso7816_process_fci: getting the size of the file

[Vincent Le T. <vin...@my...>]

Hi,

I've a question about how the file size is retrieved.
It is implemented in iso7816.c:
https://github.com/OpenSC/OpenSC/blob/master/src/libopensc/iso7816.c#L362-373

I'm not a DER expert that's why I'm asking.

Is a size encoded with the attribute 0x80 with 4 bytes valid ?
How can I find the difference between 0x81 & 0x80 ?

I get a card with both 0x80 (4 bytes) and 0x81 (2 bytes) tags.
If a 4 bytes is valid, I'd like to propose a patch to the iso7816.c file to
handle it.

regards,
-- 
--
Vincent Le Toux

My Smart Logon
www.mysmartlogon.com