/usr/share/pyshared/smartcard/ExclusiveConnectCardConnection.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 | """CardConnectionDecorator that provides exclusive use of a card.
__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 SCardConnect, SCardDisconnect
from smartcard.scard import SCARD_LEAVE_CARD, SCARD_SHARE_EXCLUSIVE
from smartcard.scard import SCardGetErrorMessage
from smartcard.pcsc import PCSCCardConnection
import smartcard.pcsc
class ExclusiveConnectCardConnection(CardConnectionDecorator):
'''This decorator uses exclusive access to the card during
connection to prevent other processes to connect to this card.'''
def __init__(self, cardconnection):
CardConnectionDecorator.__init__(self, cardconnection)
def connect(self, protocol=None, mode=None, disposition=None):
'''Disconnect and reconnect in exclusive mode PCSCCardconnections.'''
CardConnectionDecorator.connect(self, protocol, mode, disposition)
component = self.component
while True:
if isinstance(
component,
smartcard.pcsc.PCSCCardConnection.PCSCCardConnection):
pcscprotocol = PCSCCardConnection.translateprotocolmask(
protocol)
if 0 == pcscprotocol:
pcscprotocol = component.getProtocol()
if None != component.hcard:
hresult = SCardDisconnect(component.hcard,
SCARD_LEAVE_CARD)
if hresult != 0:
raise CardConnectionException('Failed to disconnect: '
+ SCardGetErrorMessage(hresult))
hresult, component.hcard, dwActiveProtocol = SCardConnect(
component.hcontext, str(component.reader),
SCARD_SHARE_EXCLUSIVE, pcscprotocol)
if hresult != 0:
raise CardConnectionException(
'Failed to connect with SCARD_SHARE_EXCLUSIVE' +\
SCardGetErrorMessage(hresult))
# print 'reconnected exclusive'
break
if hasattr(component, 'component'):
component = component.component
else:
break
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