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#! /usr/bin/env python3
# SCardReconnect.py : Unitary test for SCardReconnect
# Copyright (C) 2009-2011 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/>.
"""
# SCardReconnect() should block instead of returning SCARD_E_SHARING_VIOLATION
# when the reconnection requests exclusive access and the reader is
# already shared.
"""
import sys
from smartcard.pcsc.PCSCExceptions import (
BaseSCardException,
EstablishContextException,
ListReadersException,
ReleaseContextException,
)
from smartcard.scard import (
SCARD_LEAVE_CARD,
SCARD_PROTOCOL_ANY,
SCARD_RESET_CARD,
SCARD_S_SUCCESS,
SCARD_SCOPE_USER,
SCARD_SHARE_EXCLUSIVE,
SCARD_SHARE_SHARED,
SCardConnect,
SCardDisconnect,
SCardEstablishContext,
SCardListReaders,
SCardReconnect,
SCardReleaseContext,
)
hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
if hresult != SCARD_S_SUCCESS:
raise EstablishContextException(hresult)
hresult, readers = SCardListReaders(hcontext, [])
if hresult != SCARD_S_SUCCESS:
raise ListReadersException(hresult)
print("PC/SC Readers:", readers)
reader = readers[0]
print("Using reader:", reader)
# Connect in SCARD_SHARE_SHARED mode
hresult, hcard, dwActiveProtocol = SCardConnect(
hcontext, reader, SCARD_SHARE_SHARED, SCARD_PROTOCOL_ANY
)
if hresult != SCARD_S_SUCCESS:
raise BaseSCardException(hresult)
# start here another application using the reader in SCARD_SHARE_SHARED
# mode
print("Press enter")
sys.stdin.read(1)
# Reconnect in SCARD_SHARE_EXCLUSIVE mode
hresult, dwActiveProtocol = SCardReconnect(
hcard, SCARD_SHARE_EXCLUSIVE, SCARD_PROTOCOL_ANY, SCARD_LEAVE_CARD
)
if hresult != SCARD_S_SUCCESS:
raise BaseSCardException(hresult)
hresult = SCardDisconnect(hcard, SCARD_RESET_CARD)
if hresult != SCARD_S_SUCCESS:
raise BaseSCardException(hresult)
hresult = SCardReleaseContext(hcontext)
if hresult != SCARD_S_SUCCESS:
raise ReleaseContextException(hresult)
|
