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https://gitea.osmocom.org/sim-card/pysim.git
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Eric Wild
515925228d
TS 102 221 section 7.3.1.1.4 clause 4b lets the card answer a case #4 command TPDU with a 62xx/63xx warning, upon which the terminal sends a dummy GET RESPONSE to obtain the 61xx that announces the response length. __send_apdu_T0() applies that unconditionally, to the status word that terminates a GET RESPONSE... That is not "redundant", as per GPC v2.3.1 section 11.4.3.2 table 11-38 GP GET STATUS (80 F2) answers 6310 "more data available", meaning reissue the command as get next occurrence(s) with P2 bit 1 set (11.4.2.2 table 11-34), so for example a paginated registry listing exchange looks like this: 84f22000024f00 => 61e4 first match, e4 bytes waiting 84c00000e4 => <page 1> 6310 more matches pending 84c0000000 => 6982 <- unsolicited, card rejects it The card rejects the unsolicited GET RESPONSE with 6982, our SCP02 session breaks, and the next command fail with 6985. The 6310 never reaches ADF_SD.get_status() either, so the pagination loop exits after page 1 and prints a sliently truncated listing. Observed with a SJA5. Fix by turning clause 4b würgaround into what it should be: a one shot reaction to the SW returned for the command TPDU. While at it, stop ADF_SD.get_status() from silently returning a truncated registry: it treated every status word other than 6310 as "nothing more to report". 6A88 is now the explicit empty result and anything else raises, so a partial listing can no longer silently pass. Adds unit tests for all of that so we dont break basic T0 things. Change-Id: I10f8afa8dd5623a49a6a0e7132607b3a1fad2d8c
68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
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""" pySim: Exceptions
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"""
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#
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# Copyright (C) 2009-2010 Sylvain Munaut <tnt@246tNt.com>
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# Copyright (C) 2021 Harald Welte <laforge@osmocom.org>
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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 NoCardError(Exception):
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"""No card was found in the reader."""
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class ProtocolError(Exception):
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"""Some kind of protocol level error interfacing with the card."""
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class ReaderError(Exception):
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"""Some kind of general error with the card reader."""
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class SwMatchError(Exception):
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"""Raised when an operation specifies an expected SW but the actual SW from
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the card doesn't match."""
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def __init__(self, sw_actual: str, sw_expected, rs=None):
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"""
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Args:
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sw_actual : the SW we actually received from the card (4 hex digits)
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sw_expected : the SW we expected to receive from the card (4 hex digits),
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or a list of acceptable ones
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rs : interpreter class to convert SW to string
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"""
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self.sw_actual = sw_actual
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self.sw_expected = '/'.join(sw_expected) if isinstance(sw_expected, (list, tuple)) else sw_expected
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self.rs = rs
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@property
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def description(self):
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if self.rs and self.rs.lchan[0]:
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r = self.rs.lchan[0].interpret_sw(self.sw_actual)
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if r:
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return "%s - %s" % (r[0], r[1])
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return ''
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def __str__(self):
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description = self.description
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if description:
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description = ": " + description
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else:
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description = "."
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return "SW match failed! Expected %s and got %s%s" % (self.sw_expected, self.sw_actual, description)
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