/usr/share/pyshared/smartcard/ExclusiveTransmitCardConnection.py is in python-pyscard 1.6.12.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 | """Sample CardConnectionDecorator that provides exclusive transmit()
__author__ = "http://www.gemalto.com"
Copyright 2001-2012 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.CardConnection import CardConnection
from smartcard.CardConnectionDecorator import CardConnectionDecorator
from smartcard.Exceptions import CardConnectionException
from smartcard.scard import SCardBeginTransaction, SCardEndTransaction
from smartcard.scard import SCARD_LEAVE_CARD
from smartcard.scard import SCardGetErrorMessage
from smartcard.pcsc import PCSCCardConnection
import smartcard.pcsc
class ExclusiveTransmitCardConnection(CardConnectionDecorator):
'''This decorator uses SCardBeginTransaction/SCardEndTransaction to
preserve other processes of threads to access the card during
transmit().'''
def __init__(self, cardconnection):
CardConnectionDecorator.__init__(self, cardconnection)
def lock(self):
'''Lock card with SCardBeginTransaction.'''
component = self.component
while True:
if isinstance(
component,
smartcard.pcsc.PCSCCardConnection.PCSCCardConnection):
hresult = SCardBeginTransaction(component.hcard)
if 0 != hresult:
raise CardConnectionException(
'Failed to lock with SCardBeginTransaction' +\
SCardGetErrorMessage(hresult))
else:
#print 'locked'
pass
break
if hasattr(component, 'component'):
component = component.component
else:
break
def unlock(self):
'''Unlock card with SCardEndTransaction.'''
component = self.component
while True:
if isinstance(
component,
smartcard.pcsc.PCSCCardConnection.PCSCCardConnection):
hresult = SCardEndTransaction(component.hcard,
SCARD_LEAVE_CARD)
if 0 != hresult:
raise CardConnectionException(
'Failed to unlock with SCardEndTransaction' +\
SCardGetErrorMessage(hresult))
else:
#print 'unlocked'
pass
break
if hasattr(component, 'component'):
component = component.component
else:
break
def transmit(self, bytes, protocol=None):
'''Gain exclusive access to card during APDU transmission for if this
decorator decorates a PCSCCardConnection.'''
data, sw1, sw2 = CardConnectionDecorator.transmit(
self, bytes, protocol)
return data, sw1, sw2
|