#! /usr/bin/env python3
"""
Sample for python PCSC wrapper module: get card ATR in first pcsc reader

__author__ = "http://www.gemalto.com"

Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com
Copyright 2010 Ludovic Rousseau
Author: Ludovic Rousseau, mailto:ludovic.rousseau@free.fr

This file is part of pyscard.

pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

pyscard 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""

from smartcard.scard import *
import smartcard.util
import sys

if __name__ == '__main__':
    hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
    if hresult != SCARD_S_SUCCESS:
        raise error(
            'Failed to establish context: ' +
            SCardGetErrorMessage(hresult))
    print('Context established!')

    try:
        hresult, readers = SCardListReaders(hcontext, [])
        if hresult != SCARD_S_SUCCESS:
            raise error(
                'Failed to list readers: ' +
                SCardGetErrorMessage(hresult))
        if len(readers) < 1:
            raise Exception('No smart card readers')
        print('PCSC Readers:', readers)

        for reader in readers:
            print('Trying to retreive ATR of card in', reader)

            hresult, hcard, dwActiveProtocol = SCardConnect(
                hcontext,
                reader,
                SCARD_SHARE_SHARED, SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1)
            if hresult != SCARD_S_SUCCESS:
                print('Unable to connect: ' + SCardGetErrorMessage(hresult))
            else:

                print('Connected with active protocol', dwActiveProtocol)

                try:
                    hresult, reader, state, protocol, atr = SCardStatus(hcard)
                    if hresult != SCARD_S_SUCCESS:
                        print('failed to get status: ' +
                              SCardGetErrorMessage(hresult))
                    print('Reader:', reader)
                    print('State:', hex(state))
                    print('Protocol:', protocol)
                    print('ATR:', smartcard.util.toHexString(
                                        atr,
                                        smartcard.util.HEX))

                finally:
                    hresult = SCardDisconnect(hcard, SCARD_UNPOWER_CARD)
                    if hresult != SCARD_S_SUCCESS:
                        print('Failed to disconnect: ' +
                              SCardGetErrorMessage(hresult))
                    print('Disconnected')

    finally:
        hresult = SCardReleaseContext(hcontext)
        if hresult != SCARD_S_SUCCESS:
            raise error('Failed to release context: ' +
                        SCardGetErrorMessage(hresult))
        print('Released context.')

if 'win32' == sys.platform:
    print('press Enter to continue')
    sys.stdin.read(1)
