RavKav Balance ** For test only **

output.txt

$ python selectDEOfCard.py
insert a card (RavKav) within 10s
You have 1.8 NIS in your RavKav

RavKavBalance.py

#!/usr/bin/python
"""
    Licence: GPLv2
    Dependecies:
        pcsc
        swig
        pyscard
"""
from __future__ import print_function
from smartcard.CardType import AnyCardType
from smartcard.CardRequest import CardRequest
from smartcard.CardConnectionObserver import ConsoleCardConnectionObserver
from smartcard.Exceptions import CardRequestTimeoutException
from smartcard.util import *

# define the apdus used in this script
GET_RESPONSE = [0XA0, 0XC0, 00, 00]
SELECT = [0x94, 0xA4, 0x00, 0x00, 0x02]
TICKETING_FOLDER = [0x20,0x00,0x00]
BALANCE_FILE = [0x20,0x2A,0x00]
READ_RECORD = [0x94,0xB2,0x01,0x04,0x1D]

#convert bytes to int
def byteStringToInt (bytes, offset, length):
    if (len(bytes) < offset + length):
        #err
        return 0
    return int(bytes[offset:length*2],16)
    

# request any card type
cardtype = AnyCardType()

try:
    # request card insertion
    print('insert a card (RavKav) within 10s')
    cardrequest = CardRequest(timeout=10, cardType=cardtype)
    cardservice = cardrequest.waitforcard()

    # attach the console tracer [for Debug]
    observer = ConsoleCardConnectionObserver()
    cardservice.connection.addObserver(observer)

    # connect to the card and perform a transmits
    cardservice.connection.connect()

    apdu =  SELECT + BALANCE_FILE
    response, sw1, sw2 = cardservice.connection.transmit(apdu)
    # there is a BALANCE_FILE
    if sw1 == 0x90:
        apdu =  READ_RECORD
        response, sw1, sw2 = cardservice.connection.transmit(apdu)
        print("You have " + str(byteStringToInt(toHexString(response,PACK),0,3)/100) + " NIS in your RavKav")
    else:
        print('no BALANCE_FILE')

except CardRequestTimeoutException:
    print('time-out: no card inserted during last 10s')