ISO7816_9ErrorChecker.py :  » Mobile » pyscard » pyscard-1.6.10 » smartcard » sw » Python Open Source

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Python Open Source » Mobile » pyscard 
pyscard » pyscard 1.6.10 » smartcard » sw » ISO7816_9ErrorChecker.py
"""ISO7816-9 error checker.

__author__ = "http://www.gemalto.com"

Copyright 2001-2010 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.sw.ErrorChecker import ErrorChecker
import smartcard.sw.SWExceptions

iso7816_9SW = {
    0x62:( smartcard.sw.SWExceptions.WarningProcessingException,
           { 0x82:"End of file/record reached" } ),

    0x64:( smartcard.sw.SWExceptions.ExecutionErrorException,
           { 0x00:"Execution error" } ),

    0x69:( smartcard.sw.SWExceptions.CheckingErrorException,
           { 0x82:"Security status not satisfied" } ),

    0x6A:( smartcard.sw.SWExceptions.CheckingErrorException,
           { 0x80:"Incorrect parameters in data field",
             0x84:"Not enough memory space",
             0x89:"File already exists",
             0x8A:"DF name already exists" } ),
}


class ISO7816_9ErrorChecker( ErrorChecker ):
    """ISO7816-8 error checker.

    This error checker raises the following exceptions:

    sw1 sw2
    62  82          WarningProcessingException
    64  00          ExecutionErrorException
    69  82          CheckingErrorException
    6A  80,84,89,8A CheckingErrorException

    This checker does not raise exceptions on undefined sw1 values, e.g.:

    sw1 sw2
    63  any
    6F  any

    and on undefined sw2 values, e.g.:

    sw1 sw2
    62  81 83
    64  any except 00


    Use another checker in the error checking chain, e.g., the ISO7816_4SW1ErrorChecker or
    ISO7816_4ErrorChecker, to raise exceptions on these undefined values.
    """
    def __call__( self, data, sw1, sw2 ):
        """Called to test data, sw1 and sw2 for error.

        data:       apdu response data
        sw1, sw2:   apdu data status words

        Derived classes must raise a smartcard.sw.SWException upon error."""
        if iso7816_9SW.has_key( sw1 ):
            exception, sw2dir = iso7816_9SW[sw1]
            if type(sw2dir)==type({}):
                try:
                    message = sw2dir[sw2]
                    raise exception( data, sw1, sw2, message )
                except KeyError:
                    pass


if __name__ == '__main__':
    """Small sample illustrating the use of ISO7816_9ErrorChecker."""
    ecs=ISO7816_9ErrorChecker()
    ecs( [], 0x90, 0x00 )
    ecs( [], 0x6a, 0x81 )
    try:
        ecs( [], 0x6A, 0x8A )
    except smartcard.sw.SWExceptions.CheckingErrorException, e:
        print e, "%x %x" % (e.sw1, e.sw2)
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