mirror of https://gerrit.osmocom.org/pysim
107 lines
3.4 KiB
Python
107 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
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""" pySim: PCSC reader transport link base
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"""
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from pySim.exceptions import *
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#
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# Copyright (C) 2009-2010 Sylvain Munaut <tnt@246tNt.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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class LinkBase(object):
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def wait_for_card(self, timeout=None, newcardonly=False):
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"""wait_for_card(): Wait for a card and connect to it
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timeout : Maximum wait time (None=no timeout)
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newcardonly : Should we wait for a new card, or an already
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inserted one ?
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"""
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pass
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def connect(self):
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"""connect(): Connect to a card immediately
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"""
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pass
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def disconnect(self):
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"""disconnect(): Disconnect from card
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"""
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pass
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def reset_card(self):
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"""reset_card(): Resets the card (power down/up)
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"""
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pass
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def send_apdu_raw(self, pdu):
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"""send_apdu_raw(pdu): Sends an APDU with minimal processing
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pdu : string of hexadecimal characters (ex. "A0A40000023F00")
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return : tuple(data, sw), where
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data : string (in hex) of returned data (ex. "074F4EFFFF")
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sw : string (in hex) of status word (ex. "9000")
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"""
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pass
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def send_apdu(self, pdu):
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"""send_apdu(pdu): Sends an APDU and auto fetch response data
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pdu : string of hexadecimal characters (ex. "A0A40000023F00")
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return : tuple(data, sw), where
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data : string (in hex) of returned data (ex. "074F4EFFFF")
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sw : string (in hex) of status word (ex. "9000")
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"""
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data, sw = self.send_apdu_raw(pdu)
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# When whe have sent the first APDU, the SW may indicate that there are response bytes
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# available. There are two SWs commonly used for this 9fxx (sim) and 61xx (usim), where
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# xx is the number of response bytes available.
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# See also:
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# SW1=9F: 3GPP TS 51.011 9.4.1, Responses to commands which are correctly executed
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# SW1=61: ISO/IEC 7816-4, Table 5 — General meaning of the interindustry values of SW1-SW2
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if (sw is not None) and ((sw[0:2] == '9f') or (sw[0:2] == '61')):
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pdu_gr = pdu[0:2] + 'c00000' + sw[2:4]
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data, sw = self.send_apdu_raw(pdu_gr)
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return data, sw
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def send_apdu_checksw(self, pdu, sw="9000"):
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"""send_apdu_checksw(pdu,sw): Sends an APDU and check returned SW
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pdu : string of hexadecimal characters (ex. "A0A40000023F00")
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sw : string of 4 hexadecimal characters (ex. "9000"). The
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user may mask out certain digits using a '?' to add some
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ambiguity if needed.
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return : tuple(data, sw), where
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data : string (in hex) of returned data (ex. "074F4EFFFF")
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sw : string (in hex) of status word (ex. "9000")
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"""
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rv = self.send_apdu(pdu)
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# Create a masked version of the returned status word
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sw_masked = ""
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for i in range(0, 4):
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if sw.lower()[i] == '?':
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sw_masked = sw_masked + '?'
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else:
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sw_masked = sw_masked + rv[1][i].lower()
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if sw.lower() != sw_masked:
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raise SwMatchError(rv[1], sw.lower())
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return rv
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