laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/pysim/+/28963 )

Change subject: pySim.transport: Add mechanism for handling for CAT/USAT proactive cmds ......................................................................

pySim.transport: Add mechanism for handling for CAT/USAT proactive cmds

This introduces an optional argument to the LinkBase class constructor, where the application can pass an instance of a ProactiveHandler derived class in order to handle the proactive commands that the LinkBase is automatically fetching whenever the card indicates so.

Change-Id: I844504e2fc1b27ce4fc7ede20b2307e698baa0f6 --- M pySim/transport/__init__.py 1 file changed, 15 insertions(+), 4 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/63/28963/1

diff --git a/pySim/transport/__init__.py b/pySim/transport/__init__.py index 9364b07..bc18b5a 100644 --- a/pySim/transport/__init__.py +++ b/pySim/transport/__init__.py @@ -9,11 +9,11 @@

from pySim.exceptions import * from pySim.construct import filter_dict -from pySim.utils import sw_match, b2h, h2b, i2h +from pySim.utils import sw_match, b2h, h2b, i2h, Hexstr

# # Copyright (C) 2009-2010 Sylvain Munaut tnt@246tNt.com -# Copyright (C) 2021 Harald Welte laforge@osmocom.org +# Copyright (C) 2021-2022 Harald Welte laforge@osmocom.org # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -37,13 +37,22 @@ def trace_response(self, cmd, sw, resp): pass

+class ProactiveHandler(abc.ABC): + """Abstract base class representing the interface of some code that handles + the proactive commands, as returned by the card in responses to the FETCH + command.""" + @abc.abstractmethod + def receive_fetch(payload: Hexstr): + pass

class LinkBase(abc.ABC): """Base class for link/transport to card."""

- def __init__(self, sw_interpreter=None, apdu_tracer=None): + def __init__(self, sw_interpreter=None, apdu_tracer=None, + proactive_handler: Optional[ProactiveHandler]=None): self.sw_interpreter = sw_interpreter self.apdu_tracer = apdu_tracer + self.proactive_handler = proactive_handler

@abc.abstractmethod def _send_apdu_raw(self, pdu: str) -> Tuple[str, str]: @@ -137,10 +146,12 @@ """ rv = self.send_apdu(pdu)

- if sw == '9000' and sw_match(rv[1], '91xx'): + while sw == '9000' and sw_match(rv[1], '91xx'): # proactive sim as per TS 102 221 Setion 7.4.2 rv = self.send_apdu_checksw('80120000' + rv[1][2:], sw) print("FETCH: %s", rv[0]) + if self.proactive_handler: + self.proactive_handler.receive_fetch(rv[0]) if not sw_match(rv[1], sw): raise SwMatchError(rv[1], sw.lower(), self.sw_interpreter) return rv