/usr/lib/python2.7/dist-packages/smartcard/CardConnection.py is in python-pyscard 1.9.6-2.
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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 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | """The CardConnection abstract class manages connections with a card and
apdu transmission.
__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.CardConnectionEvent import CardConnectionEvent
from smartcard.Observer import Observable
class CardConnection(Observable):
"""Card connection abstract class.
Known subclasses: smartcard.pcsc.PCSCCardConnection
"""
T0_protocol = 0x00000001
T1_protocol = 0x00000002
RAW_protocol = 0x00010000
T15_protocol = 0x00000008
def __init__(self, reader):
"""Construct a new card connection.
@param reader: name of the reader in which the smartcard to connect
to is located.
"""
Observable.__init__(self)
self.reader = reader
self.errorcheckingchain = None
self.defaultprotocol = CardConnection.T0_protocol |\
CardConnection.T1_protocol
def __del__(self):
"""Connect to card."""
pass
def addSWExceptionToFilter(self, exClass):
"""Add a status word exception class to be filtered.
@param exClass: the class to filter, e.g.
L{smartcard.sw.SWException.WarningProcessingException}
Filtered exceptions will not be raised when encountered in the
error checking chain."""
if None != self.errorcheckingchain:
self.errorcheckingchain[0].addFilterException(exClass)
def addObserver(self, observer):
"""Add a CardConnection observer."""
Observable.addObserver(self, observer)
def deleteObserver(self, observer):
"""Remove a CardConnection observer."""
Observable.deleteObserver(self, observer)
def connect(self, protocol=None, mode=None, disposition=None):
"""Connect to card.
@param protocol: a bit mask of the protocols to use, from
L{CardConnection.T0_protocol}, L{CardConnection.T1_protocol},
L{CardConnection.RAW_protocol}, L{CardConnection.T15_protocol}
@param mode: SCARD_SHARE_SHARED (default), SCARD_SHARE_EXCLUSIVE or
SCARD_SHARE_DIRECT
@param disposition: SCARD_LEAVE_CARD (default), SCARD_RESET_CARD,
SCARD_UNPOWER_CARD or SCARD_EJECT_CARD
"""
Observable.setChanged(self)
Observable.notifyObservers(self, CardConnectionEvent('connect'))
def disconnect(self):
"""Disconnect from card."""
Observable.setChanged(self)
Observable.notifyObservers(self, CardConnectionEvent('disconnect'))
def getATR(self):
"""Return card ATR"""
pass
def getProtocol(self):
"""Return bit mask for the protocol of connection, or None if no
protocol set. The return value is a bit mask of
CardConnection.T0_protocol, CardConnection.T1_protocol,
CardConnection.RAW_protocol, CardConnection.T15_protocol
"""
return self.defaultprotocol
def getReader(self):
"""Return card connection reader"""
return self.reader
def setErrorCheckingChain(self, errorcheckingchain):
"""Add an error checking chain.
@param errorcheckingchain: a smartcard.sw.ErrorCheckingChain object The
error checking strategies in errorchecking chain will be tested
with each received response APDU, and a
smartcard.sw.SWException.SWException will be raised upon
error."""
self.errorcheckingchain = errorcheckingchain
def setProtocol(self, protocol):
"""Set protocol for card connection.
@param protocol: a bit mask of CardConnection.T0_protocol,
CardConnection.T1_protocol, CardConnection.RAW_protocol,
CardConnection.T15_protocol e.g.
setProtocol(CardConnection.T1_protocol |
CardConnection.T0_protocol) """
self.defaultprotocol = protocol
def transmit(self, bytes, protocol=None):
"""Transmit an apdu. Internally calls doTransmit() class method
and notify observers upon command/response APDU events.
Subclasses must override the doTransmit() class method.
@param bytes: list of bytes to transmit
@param protocol: the transmission protocol, from
CardConnection.T0_protocol,
CardConnection.T1_protocol, or
CardConnection.RAW_protocol
"""
Observable.setChanged(self)
Observable.notifyObservers(self,
CardConnectionEvent(
'command',
[bytes, protocol]))
data, sw1, sw2 = self.doTransmit(bytes, protocol)
Observable.setChanged(self)
Observable.notifyObservers(self,
CardConnectionEvent(
'response',
[data, sw1, sw2]))
if None != self.errorcheckingchain:
self.errorcheckingchain[0](data, sw1, sw2)
return data, sw1, sw2
def doTransmit(self, bytes, protocol):
"""Performs the command APDU transmission.
Subclasses must override this method for implementing apdu
transmission."""
pass
def control(self, controlCode, bytes=[]):
"""Send a control command and buffer. Internally calls doControl()
class method and notify observers upon command/response events.
Subclasses must override the doControl() class method.
@param controlCode: command code
@param bytes: list of bytes to transmit
"""
Observable.setChanged(self)
Observable.notifyObservers(self,
CardConnectionEvent(
'command',
[controlCode, bytes]))
data = self.doControl(controlCode, bytes)
Observable.setChanged(self)
Observable.notifyObservers(self,
CardConnectionEvent(
'response',
data))
if None != self.errorcheckingchain:
self.errorcheckingchain[0](data)
return data
def doControl(self, controlCode, bytes):
"""Performs the command control.
Subclasses must override this method for implementing control."""
pass
def getAttrib(self, attribId):
"""return the requested attribute
@param attribId: attribute id like SCARD_ATTR_VENDOR_NAME
"""
Observable.setChanged(self)
Observable.notifyObservers(self,
CardConnectionEvent(
'attrib',
[attribId]))
data = self.doGetAttrib(attribId)
if None != self.errorcheckingchain:
self.errorcheckingchain[0](data)
return data
def doGetAttrib(self, attribId):
"""Performs the command get attrib.
Subclasses must override this method for implementing get attrib."""
pass
def __enter__(self):
"""Enter the runtime context.
"""
return self
def __exit__(self, type, value, traceback):
"""Exit the runtime context trying to disconnect.
"""
self.disconnect()
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