mirror of https://gerrit.osmocom.org/pysim
151 lines
4.1 KiB
Python
151 lines
4.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# Copyright (C) 2018 Vadim Yanitskiy <axilirator@gmail.com>
|
|
#
|
|
# 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
|
|
# the Free Software Foundation, either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program 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 General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
import select
|
|
import struct
|
|
import socket
|
|
import os
|
|
|
|
from pySim.transport import LinkBase
|
|
from pySim.exceptions import *
|
|
from pySim.utils import h2b, b2h
|
|
|
|
class L1CTLMessage(object):
|
|
|
|
# Every (encoded) L1CTL message has the following structure:
|
|
# - msg_length (2 bytes, net order)
|
|
# - l1ctl_hdr (packed structure)
|
|
# - msg_type
|
|
# - flags
|
|
# - padding (2 spare bytes)
|
|
# - ... payload ...
|
|
|
|
def __init__(self, msg_type, flags = 0x00):
|
|
# Init L1CTL message header
|
|
self.data = struct.pack("BBxx", msg_type, flags)
|
|
|
|
def gen_msg(self):
|
|
return struct.pack("!H", len(self.data)) + self.data
|
|
|
|
class L1CTLMessageReset(L1CTLMessage):
|
|
|
|
# L1CTL message types
|
|
L1CTL_RESET_REQ = 0x0d
|
|
L1CTL_RESET_IND = 0x07
|
|
L1CTL_RESET_CONF = 0x0e
|
|
|
|
# Reset types
|
|
L1CTL_RES_T_BOOT = 0x00
|
|
L1CTL_RES_T_FULL = 0x01
|
|
L1CTL_RES_T_SCHED = 0x02
|
|
|
|
def __init__(self, type = L1CTL_RES_T_FULL):
|
|
super(L1CTLMessageReset, self).__init__(self.L1CTL_RESET_REQ)
|
|
self.data += struct.pack("Bxxx", type)
|
|
|
|
class L1CTLMessageSIM(L1CTLMessage):
|
|
|
|
# SIM related message types
|
|
L1CTL_SIM_REQ = 0x16
|
|
L1CTL_SIM_CONF = 0x17
|
|
|
|
def __init__(self, pdu):
|
|
super(L1CTLMessageSIM, self).__init__(self.L1CTL_SIM_REQ)
|
|
self.data += pdu
|
|
|
|
class CalypsoSimLink(LinkBase):
|
|
"""Transport Link for Calypso based phones."""
|
|
|
|
def __init__(self, sock_path:str = "/tmp/osmocom_l2"):
|
|
# Make sure that a given socket path exists
|
|
if not os.path.exists(sock_path):
|
|
raise ReaderError("There is no such ('%s') UNIX socket" % sock_path)
|
|
|
|
print("Connecting to osmocon at '%s'..." % sock_path)
|
|
|
|
# Establish a client connection
|
|
self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
|
|
self.sock.connect(sock_path)
|
|
|
|
def __del__(self):
|
|
self.sock.close()
|
|
|
|
def wait_for_rsp(self, exp_len = 128):
|
|
# Wait for incoming data (timeout is 3 seconds)
|
|
s, _, _ = select.select([self.sock], [], [], 3.0)
|
|
if not s:
|
|
raise ReaderError("Timeout waiting for card response")
|
|
|
|
# Receive expected amount of bytes from osmocon
|
|
rsp = self.sock.recv(exp_len)
|
|
return rsp
|
|
|
|
def reset_card(self):
|
|
# Request FULL reset
|
|
req_msg = L1CTLMessageReset()
|
|
self.sock.send(req_msg.gen_msg())
|
|
|
|
# Wait for confirmation
|
|
rsp = self.wait_for_rsp()
|
|
rsp_msg = struct.unpack_from("!HB", rsp)
|
|
if rsp_msg[1] != L1CTLMessageReset.L1CTL_RESET_CONF:
|
|
raise ReaderError("Failed to reset Calypso PHY")
|
|
|
|
def connect(self):
|
|
self.reset_card()
|
|
|
|
def disconnect(self):
|
|
pass # Nothing to do really ...
|
|
|
|
def wait_for_card(self, timeout = None, newcardonly = False):
|
|
pass # Nothing to do really ...
|
|
|
|
def send_apdu_raw(self, pdu):
|
|
|
|
# Request FULL reset
|
|
req_msg = L1CTLMessageSIM(h2b(pdu))
|
|
self.sock.send(req_msg.gen_msg())
|
|
|
|
# Read message length first
|
|
rsp = self.wait_for_rsp(struct.calcsize("!H"))
|
|
msg_len = struct.unpack_from("!H", rsp)[0]
|
|
if msg_len < struct.calcsize("BBxx"):
|
|
raise ReaderError("Missing L1CTL header for L1CTL_SIM_CONF")
|
|
|
|
# Read the whole message then
|
|
rsp = self.sock.recv(msg_len)
|
|
|
|
# Verify L1CTL header
|
|
hdr = struct.unpack_from("BBxx", rsp)
|
|
if hdr[0] != L1CTLMessageSIM.L1CTL_SIM_CONF:
|
|
raise ReaderError("Unexpected L1CTL message received")
|
|
|
|
# Verify the payload length
|
|
offset = struct.calcsize("BBxx")
|
|
if len(rsp) <= offset:
|
|
raise ProtocolError("Empty response from SIM?!?")
|
|
|
|
# Omit L1CTL header
|
|
rsp = rsp[offset:]
|
|
|
|
# Unpack data and SW
|
|
data = rsp[:-2]
|
|
sw = rsp[-2:]
|
|
|
|
return b2h(data), b2h(sw)
|