Question about how to use opensc from wpa_supplicant

This question is a continuation from the previous thread 'Error with
pcsc_scan - "buffer overflow detected"'.

I have got a Gemalto IDBridge K30 (as you suggested at the end of the
above thread, thank you) and it seems to work OK with opensc on my
xubuntu 16.04 system:-

    root@esprimo# pcsc_scan
    PC/SC device scanner
    V 1.4.25 (c) 2001-2011, Ludovic Rousseau <[email protected]>
    Compiled with PC/SC lite version: 1.8.14
    Using reader plug'n play mechanism
    Scanning present readers...
    0: Gemalto USB Shell Token V2 (5689ABD5) 00 00

    Tue Aug  2 12:24:58 2016
    Reader 0: Gemalto USB Shell Token V2 (5689ABD5) 00 00
      Card state: Card inserted, 
      ATR: 3B 16 95 D0 01 6C FD 0D 00

    ATR: 3B 16 95 D0 01 6C FD 0D 00
    + TS = 3B --> Direct Convention
    + T0 = 16, Y(1): 0001, K: 6 (historical bytes)
      TA(1) = 95 --> Fi=512, Di=16, 32 cycles/ETU
        125000 bits/s at 4 MHz, fMax for Fi = 5 MHz => 156250 bits/s
    + Historical bytes: D0 01 6C FD 0D 00
      Category indicator byte: D0 (proprietary format)

    Possibly identified card (using /root/.cache/smartcard_list.txt):
            NONE

    Your card is not present in the database.
    Please submit your unknown card at:
    http://smartcard-atr.appspot.com/parse?ATR=3B1695D0016CFD0D00


Now I want to be able to use the information of the card from
wpa_supplicant.  The blog/instructions I'm following add the following
to the wpa_supplicant configuration file:-

    network={
      ssid="FreeWifi_secure"
      key_mgmt=WPA-EAP IEEE8021X
      eap=SIM
      pin="1234"
      pcsc=""
    }

Is this really enough to make wpa_supplicant get the information from
the card using opensc?  Presumably I'd need to run pcscd but is that
all?

I realise this is a bit off-topic but I can find very little
information about this anywhere else so any help (or pointers to help)
would be much appreciated.

-- 
Chris Green

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