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#! /usr/bin/env python3
"""
# GetSetNAD.py: get/set NAD value
# Copyright (C) 2022 Ludovic Rousseau
"""
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
from smartcard.System import readers
from smartcard.pcsc.PCSCPart10 import SCARD_LEAVE_CARD, SCARD_CTL_CODE
from smartcard import Exceptions
from smartcard.util import toHexString
def get_nad(cardConnection):
print("Get NAD")
get_NAD = [0x3F, 0, 0]
print(" command:", toHexString(get_NAD))
res = cardConnection.control(SCARD_CTL_CODE(3600), get_NAD)
print(" result:", toHexString(res))
status = res[3]
if status == 0:
print("Success")
nad = res[4]
print("NAD:", nad)
else:
print("Failed!")
def set_nad(cardConnection, nad):
print("Set NAD")
set_NAD = [0x3E, 0, 1, nad]
print(" command:", toHexString(set_NAD))
res = cardConnection.control(SCARD_CTL_CODE(3600), set_NAD)
print(" result:", toHexString(res))
status = res[3]
if status == 0:
print("Success")
else:
print("Failed!")
if __name__ == "__main__":
import sys
reader_idx = 0
if len(sys.argv) > 1:
reader_idx = int(sys.argv[1])
reader = readers()[reader_idx]
print("Reader:", reader)
cardConnection = reader.createConnection()
cardConnection.connect(disposition=SCARD_LEAVE_CARD)
get_nad(cardConnection)
set_nad(cardConnection, 42)
get_nad(cardConnection)
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