sysmocom/suites/encryption/lib/testlib.py

#!/usr/bin/env python3
from osmo_gsm_tester.testenv import *

def encryption_test_setup_run(enable_auth, algo):
    hlr = tenv.hlr()
    bts = tenv.bts()
    mgw_msc = tenv.mgw()
    mgw_bsc = tenv.mgw()
    stp = tenv.stp()
    msc = tenv.msc(hlr, mgw_msc, stp)
    bsc = tenv.bsc(msc, mgw_bsc, stp)
    ms = tenv.modem()

    print('start network...')
    msc.set_authentication(enable_auth)
    msc.set_encryption(algo)
    bsc.set_encryption(algo)
    hlr.start()
    stp.start()
    msc.start()
    mgw_msc.start()
    mgw_bsc.start()
    bsc.bts_add(bts)
    bsc.start()
    bts.start()
    wait(bsc.bts_is_connected, bts)

    ms.log_info()
    good_ki = ms.ki()
    bad_ki = ("%1X" % (int(good_ki[0], 16) ^ 0x01)) + good_ki[1:]

    print('KI changed: ' + good_ki + " => " + bad_ki)
    ms.set_ki(bad_ki)
    hlr.subscriber_add(ms)
    if enable_auth:
        print('Attempt connection with wrong KI...')
        ms.connect(msc.mcc_mnc())

        sleep(40) # TODO: read pcap or CTRL interface and look for Rejected? (gsm_a.dtap.msg_mm_type == 0x04)
        print('Asserting modem did not register')
        # FIXME: this can fail because ofono qmi signals registered before being accepted by network. See OS#2458
        # assert not ms.is_registered(msc.mcc_mnc())
        assert not msc.subscriber_attached(ms)

        hlr.subscriber_delete(ms)
        print('KI changed: ' + bad_ki + " => " + good_ki)
        ms.set_ki(good_ki)
        hlr.subscriber_add(ms, ms.msisdn())
        print('Attempt connection with correct KI...')
    else:
        print('Attempt connection with wrong KI, should work as it is not used...')
    ms.connect(msc.mcc_mnc())
    wait(ms.is_registered, msc.mcc_mnc())
    wait(msc.subscriber_attached, ms)