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Source Code for Module smartcard.pcsc.PCSCReaderGroups

  1  """PCSCReaderGroups organizes smartcard readers as groups. 
  2   
  3  __author__ = "gemalto 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   
 25  from smartcard.scard import * 
 26  from smartcard.reader.ReaderGroups import readergroups, innerreadergroups 
 27  from smartcard.pcsc.PCSCExceptions import * 
 28   
 29   
 30 -class pcscinnerreadergroups(innerreadergroups): 
 31      """Smartcard PCSC readers groups inner class. 
 32   
 33      The PCSCReaderGroups singleton manages the creation of the unique 
 34      instance of this class. 
 35      """ 
 36   
 37 -    def __init__(self, initlist=None): 
 38          """Constructor.""" 
 39          innerreadergroups.__init__(self, initlist) 
 40          self.unremovablegroups = ['SCard$DefaultReaders'] 
 41   
 42 -    def getreadergroups(self): 
 43          """ Returns the list of smartcard reader groups. 
 44   
 45          import smartcard 
 46          print smartcard.reader_groups() 
 47          """ 
 48          innerreadergroups.getreadergroups(self) 
 49   
 50          hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER) 
 51          if hresult != 0: 
 52              raise EstablishContextException(hresult) 
 53          hresult, readers = SCardListReaderGroups(hcontext) 
 54          if hresult != 0: 
 55              raise ListReadersException(hresult) 
 56          hresult = SCardReleaseContext(hcontext) 
 57          if hresult != 0: 
 58              raise ReleaseContextException(hresult) 
 59          return readers 
 60   
 61 -    def addreadergroup(self, newgroup): 
 62          """Add a reader group""" 
 63   
 64          innerreadergroups.addreadergroup(self, newgroup) 
 65   
 66          hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER) 
 67          if 0 != hresult: 
 68              raise error, 'Failed to establish context: ' + SCardGetErrorMessage(hresult) 
 69          try: 
 70              hresult = SCardIntroduceReaderGroup(hcontext, newgroup) 
 71              if 0 != hresult: 
 72                  raise error, 'Unable to introduce reader group: ' + SCardGetErrorMessage(hresult) 
 73          finally: 
 74              hresult = SCardReleaseContext(hcontext) 
 75              if 0 != hresult: 
 76                  raise error, 'Failed to release context: ' + SCardGetErrorMessage(hresult) 
 77   
 78 -    def removereadergroup(self, group): 
 79          """Remove a reader group""" 
 80   
 81          innerreadergroups.removereadergroup(self, group) 
 82   
 83          hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER) 
 84          if 0 != hresult: 
 85              raise error, 'Failed to establish context: ' + SCardGetErrorMessage(hresult) 
 86          try: 
 87              hresult = SCardForgetReaderGroup(hcontext, group) 
 88              if hresult != 0: 
 89                  raise error, 'Unable to forget reader group: ' + SCardGetErrorMessage(hresult) 
 90          finally: 
 91              hresult = SCardReleaseContext(hcontext) 
 92              if 0 != hresult: 
 93                  raise error, 'Failed to release context: ' + SCardGetErrorMessage(hresult) 
 94   
 95   
 96 -class PCSCReaderGroups(readergroups): 
 97      """PCSC readers groups.""" 
 98   
 99      """The single instance of __readergroups""" 
100      instance = None 
101   
102      """Constructor: create a single instance of __readergroups on first call""" 
103   
104 -    def __init__(self, initlist=None): 
105          if None == PCSCReaderGroups.instance: 
106              PCSCReaderGroups.instance = pcscinnerreadergroups(initlist) 
107   
108      """All operators redirected to inner class.""" 
109   
110 -    def __getattr__(self, name): 
111          return getattr(self.instance, name) 
112   
113   
114  if __name__ == '__main__': 
115      print PCSCReaderGroups() 
116   

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