ISMAIL MASSERAN
77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
"""Card service abstract class.
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A card service is a class providings specific smart card functionality,
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e.g. a GSM file system or an Open Platform loader. CardService is an
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abstract class from which concrete card services are derived. A concrete
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card service is almost always smart card operating system specific.
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The card service performs its specific smart card functionality by accessing
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the smartcard with a CardConnection.
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__author__ = "https://www.gemalto.com/"
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Copyright 2001-2012 gemalto
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Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com
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This file is part of pyscard.
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pyscard is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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pyscard is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with pyscard; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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"""
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class CardService:
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"""Card service abstract class."""
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def __init__(self, connection, cardname=None):
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"""Construct a new card service and bind to a smart card in a reader.
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@param connection: the CardConnection used to access the smart card
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"""
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self.connection = connection
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self.cardname = cardname
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def __del__(self):
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"""Destructor. Disconnect card and destroy card service resources."""
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self.__exit__(None, None, None)
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def __enter__(self):
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"""Enter the runtime context."""
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return self
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def __exit__(self, exc_type, exc_value, exc_traceback):
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"""Exit the runtime context and disconnect + release the PC/SC context."""
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self.connection.disconnect()
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self.connection.release()
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return False
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@staticmethod
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def supports(cardname):
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"""Returns True if the cardname is supported by the card service."""
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if __name__ == "__main__":
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# Small sample illustrating the use of CardService.
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SELECT = [0xA0, 0xA4, 0x00, 0x00, 0x02]
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DF_TELECOM = [0x7F, 0x10]
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from smartcard.System import readers
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cc = readers()[0].createConnection()
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cs = CardService(cc)
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cs.connection.connect()
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data, sw1, sw2 = cs.connection.transmit(SELECT + DF_TELECOM)
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print(f"{sw1:X} {sw2:X}")
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cs.connection.disconnect()
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cs.connection.release()
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