#! /usr/bin/env python
"""
Sample for python PCSC wrapper module: send a Control Code to a card or
reader
__author__ = "Ludovic Rousseau"
Copyright 2009-2010 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 *
from smartcard.util import toASCIIBytes
def can_do_verify_pin(hCard):
FEATURE_VERIFY_PIN_DIRECT = 6
return parse_get_feature_request(hCard, FEATURE_VERIFY_PIN_DIRECT)
def can_do_modify_pin(hCard):
FEATURE_MODIFY_PIN_DIRECT = 7
return parse_get_feature_request(hCard, FEATURE_MODIFY_PIN_DIRECT)
def parse_get_feature_request(hCard, feature):
# check the reader can do a verify pin
CM_IOCTL_GET_FEATURE_REQUEST = SCARD_CTL_CODE(3400)
hresult, response = SCardControl(hcard, CM_IOCTL_GET_FEATURE_REQUEST, [])
if hresult != SCARD_S_SUCCESS:
raise error, 'SCardControl failed: ' + SCardGetErrorMessage(hresult)
print response
while (len(response) > 0):
tag = response[0]
if (feature == tag):
return (((((response[2] << 8) + response[3]) << 8) + response[4]) << 8) + response[5]
response = response[6:]
def verifypin(hCard, control=None):
if None == control:
control = can_do_verify_pin(hCard)
if (None == control):
raise error, "Not a pinpad"
hresult, response = SCardControl(hcard, control, [])
if hresult != SCARD_S_SUCCESS:
raise error, 'SCardControl failed: ' + SCardGetErrorMessage(hresult)
return hresult, response
try:
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)
print 'PCSC Readers:', readers
if len(readers) < 1:
raise error, 'No smart card readers'
for zreader in readers:
print 'Trying to Control reader:', zreader
try:
hresult, hcard, dwActiveProtocol = SCardConnect(
hcontext, zreader, SCARD_SHARE_DIRECT, SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1)
if hresult != SCARD_S_SUCCESS:
raise error, 'Unable to connect: ' + SCardGetErrorMessage(hresult)
print 'Connected with active protocol', dwActiveProtocol
try:
cmd_verify = can_do_verify_pin(hcard)
if (cmd_verify):
print "can do verify pin: 0x%08X" % cmd_verify
cmd_modify = can_do_modify_pin(hcard)
if (cmd_modify):
print "can do modify pin: 0x%08X" % cmd_modify
(hresult, response) = verifypin(hcard, cmd_verify)
r = ""
for i in xrange(len(response)):
r += "%c" % response[i]
print 'Control:', r
finally:
hresult = SCardDisconnect(hcard, SCARD_UNPOWER_CARD)
if hresult != SCARD_S_SUCCESS:
raise error, 'Failed to disconnect: ' + SCardGetErrorMessage(hresult)
print 'Disconnected'
except error, (message):
print error, message
finally:
hresult = SCardReleaseContext(hcontext)
if hresult != SCARD_S_SUCCESS:
raise error, 'Failed to release context: ' + SCardGetErrorMessage(hresult)
print 'Released context.'
except:
import sys
print sys.exc_info()[0], ':', sys.exc_info()[1]
import sys
if 'win32' == sys.platform:
print 'press Enter to continue'
sys.stdin.read(1)
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