#! /usr/bin/env python
"""
Sample script that illustrates card connection decorators.
__author__ = "http://www.gemalto.com"
Copyright 2001-2010 gemalto
Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com
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.CardType import AnyCardType
from smartcard.CardRequest import CardRequest
from smartcard.CardConnectionObserver import ConsoleCardConnectionObserver
from smartcard.CardConnection import CardConnection
from smartcard.CardConnectionDecorator import CardConnectionDecorator
from smartcard.util import toHexString
# define two custom CardConnectionDecorator
# the decorators are very simple, just to illustrate
# shortly how several decorators can be added to the
# card connection
class SecureChannelConnection( CardConnectionDecorator ):
'''This decorator is a mockup of secure channel connection.
It merely pretends to cypher/uncypher upon apdu transmission.'''
def __init__( self, cardconnection ):
CardConnectionDecorator.__init__( self, cardconnection )
def cypher( self, bytes ):
'''Cypher mock-up; you would include the secure channel logics here.'''
print 'cyphering', toHexString( bytes )
return bytes
def uncypher( self, data ):
'''Uncypher mock-up; you would include the secure channel logics here.'''
print 'uncyphering', toHexString( data )
return data
def transmit( self, bytes, protocol=None ):
"""Cypher/uncypher APDUs before transmission"""
cypheredbytes = self.cypher( bytes )
data, sw1, sw2 = CardConnectionDecorator.transmit( self, cypheredbytes, protocol )
if []!=data:
data = self.uncypher( data )
return data, sw1, sw2
class FakeATRConnection( CardConnectionDecorator ):
'''This decorator changes the fist byte of the ATR. This is just an example
to show that decorators can be nested.'''
def __init__( self, cardconnection ):
CardConnectionDecorator.__init__( self, cardconnection )
def getATR( self ):
"""Replace first BYTE of ATR by 3F"""
atr = CardConnectionDecorator.getATR( self )
return [ 0x3f ] + atr[1:]
# define the apdus used in this script
GET_RESPONSE = [0XA0, 0XC0, 00, 00 ]
SELECT = [0xA0, 0xA4, 0x00, 0x00, 0x02]
DF_TELECOM = [0x7F, 0x10]
# request any card type
cardtype = AnyCardType()
cardrequest = CardRequest( timeout=1.5, cardType=cardtype )
cardservice = cardrequest.waitforcard()
# attach the console tracer
observer=ConsoleCardConnectionObserver()
cardservice.connection.addObserver( observer )
# attach our decorator
cardservice.connection = FakeATRConnection( SecureChannelConnection( cardservice.connection ) )
# connect to the card and perform a few transmits
cardservice.connection.connect()
print 'ATR', toHexString( cardservice.connection.getATR() )
apdu = SELECT+DF_TELECOM
response, sw1, sw2 = cardservice.connection.transmit( apdu )
if sw1 == 0x9F:
apdu = GET_RESPONSE + [sw2]
response, sw1, sw2 = cardservice.connection.transmit( apdu )
import sys
if 'win32'==sys.platform:
print 'press Enter to continue'
sys.stdin.read(1)
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