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Source Code for Module smartcard.CardNames

  1  """Card Names class 
  2   
  3  __author__ = "http://www.gemalto.com" 
  4   
  5  Copyright 2001-2011 gemalto 
  6  Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com 
  7   
  8  This file is part of pyscard. 
  9   
 10  pyscard is free software; you can redistribute it and/or modify 
 11  it under the terms of the GNU Lesser General Public License as published by 
 12  the Free Software Foundation; either version 2.1 of the License, or 
 13  (at your option) any later version. 
 14   
 15  pyscard is distributed in the hope that it will be useful, 
 16  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 18  GNU Lesser General Public License for more details. 
 19   
 20  You should have received a copy of the GNU Lesser General Public License 
 21  along with pyscard; if not, write to the Free Software 
 22  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 
 23  """ 
 24  from _bsddb import DBNotFoundError 
 25  from bsddb import hashopen 
 26  from os import environ 
 27  from os.path import join 
 28  from pickle import dumps, loads, HIGHEST_PROTOCOL 
 29   
 30   
 31  from smartcard.Synchronization import Synchronization, synchronize 
 32  from smartcard.util import toBytes 
 33   
 34   
 35 -class __CardNames__(Synchronization): 
 36      """__CardNames__ inner class. 
 37   
 38      Stores card names and card types into a bsddb hash database. 
 39   
 40      The smartcard.CardNames.CardNames singleton manages the creation 
 41      of the unique instance of this class. 
 42      """ 
 43   
 44 -    def __init__(self): 
 45          Synchronization.__init__(self) 
 46          carddb_dir = environ['ALLUSERSPROFILE'] 
 47          carddb_file = 'cardnames.bdb' 
 48          carddb_file = join(carddb_dir, carddb_file) 
 49          self.db = hashopen(carddb_file, 'w') 
 50   
 51 -    def __del__(self): 
 52          self.db.sync() 
 53          self.db.close() 
 54   
 55 -    def add(self, cardname, cardtype): 
 56          self.db[cardname] = dumps(cardtype, HIGHEST_PROTOCOL) 
 57          self.db.sync() 
 58   
 59 -    def delete(self, cardname): 
 60          try: 
 61              del self.db[cardname] 
 62          except DBNotFoundError: 
 63              pass 
 64   
 65 -    def dump(self): 
 66          for k, v in self.db.iteritems(): 
 67              print k, `loads(v)` 
 68   
 69 -    def find(self, atr, reader=None): 
 70          for k, v in self.db.iteritems(): 
 71              if loads(v).matches(atr, reader): 
 72                  return k 
 73   
 74  synchronize(__CardNames__, "add delete dump find") 
 75   
 76   
 77 -class CardNames: 
 78      """The CardNames organizes cards by a unique name and an associated 
 79      smartcard.CardType.CardType.""" 
 80   
 81      """The single instance of __CardNames__""" 
 82      instance = None 
 83   
 84 -    def __init__(self): 
 85          """Constructor: create a single instance of __readergroups on 
 86          first call""" 
 87          if None == CardNames.instance: 
 88              CardNames.instance = __CardNames__() 
 89   
 90 -    def __getattr__(self, name): 
 91          """All operators redirected to inner class.""" 
 92          return getattr(self.instance, name) 
 93   
 94   
 95  if __name__ == '__main__': 
 96      from smartcard.CardType import ATRCardType 
 97   
 98      # define a card by its ATR 
 99      ct = ATRCardType([0x3B, 0x16, 0x94, 0x20, 0x02, 0x01, 0x00, 0x00, 0x0D]) 
100   
101      # create CardName 
102      cn = CardNames() 
103      cn.add("Palmera Protect V2", ct) 
104      cn.dump() 
105      print cn.find([0x3B, 0x16, 0x94, 0x20, 0x02, 0x01, 0x00, 0x00, 0x0D]) 
106      print cn.find([0x3B, 0x16, 0x94, 0x20, 0x02, 0x01, 0x00, 0x00]) 
107      cn.delete("Palmera Protect V2") 
108      print '---------' 
109      cn.dump() 
110   

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