The SAE unit test was written when group 19 was preferred by default for
all SAE connections. However, we have now started to prefer higher
security groups. Trick the test into using group 19 by wrapping
l_ecc_supported_ike_groups implementation to return just curve 19 as a
supported curve.
ERROR: AddressSanitizer: global-buffer-overflow on address 0x000000512c08 at pc 0x00000041848d bp 0x7ffcdde71870 sp 0x7ffcdde71860
READ of size 8 at 0x000000512c08 thread T0
#0 0x41848c in print_attributes monitor/nlmon.c:6268
#1 0x42ac53 in print_message monitor/nlmon.c:6544
#2 0x438968 in nlmon_message monitor/nlmon.c:6698
#3 0x43d5e4 in nlmon_receive monitor/nlmon.c:7658
#4 0x4b3cd0 in io_callback ell/io.c:120
#5 0x4b085a in l_main_iterate ell/main.c:478
#6 0x4b0ee3 in l_main_run ell/main.c:525
#7 0x4b0ee3 in l_main_run ell/main.c:507
#8 0x4b13ac in l_main_run_with_signal ell/main.c:647
#9 0x4072fe in main monitor/main.c:811
Break up the SAE tests into two parts: testSAE and testSAE-AntiClogging
testSAE is simplified to only use two radios and a single phy managed
by hostapd. hostapd configurations are changed via the new 'set_value'
method added to hostapd utils. This allows forcing hostapd to use a
particular sae group set, or force hostapd to use SAE H2E/Hunting and
Pecking Loop for key derivation. A separate test for IKE Group 20 is no
longer required and is folded into connection_test.py
testSAE-AntiClogging is added with an environment for 5 radios instead
of 7, again with hostapd running on a single phy. 'sae_pwe' is used to
force hostapd to use SAE H2E or Hunting and Pecking for key derivation.
Both Anti-Clogging protocol variants are thus tested.
main.conf is added to both directories to force scan randomization off.
This seems to be required for hostapd to work properly on hwsim.
Instead of requiring each auth_proto to perform validation of the frames
received via rx_authenticate & rx_associate, have netdev itself perform
the mpdu validation. This is unlikely to happen anyway since the kernel
performs its own frame validation. Print a warning in case the
validation fails.
There's no reason why a change in groups would result in the
anti-clogging token becoming invalid. This might result in us needing
an extra round-trip if the peer is using countermeasures and our
requested group was deemed unsuitable.
We may receive multiple anti-clogging request messages. We memdup the
token every time, without checking whether memory for one has already
been allocated. Free the old token prior to allocating a new one.
The group was not checked at all. The specification doesn't
mention doing so specifically, but we are only likely to receive an Anti
Clogging Token Request message once we have sent our initial Commit. So
the group should be something we could have sent or might potentially be
able to use.
In case an exceptional condition occurs, handle this more consistently
by returning the following errors:
-ENOMSG -- If a message results in the retransmission timer t0 being
restarted without actually sending anything.
-EBADMSG -- If a received message is to be silently discarded without
affecting the t0 timer.
-ETIMEDOUT -- If SYNC_MAX has been exceeded
-EPROTO -- If a fatal protocol error occurred
Now that sae_verify_* methods no longer allow dropped frames though,
there's no reason to keep these checks. sae_process_commit and
sae_process_confirm will now always receive messages in their respective
state.
sae_verify_* functions were correctly marking frames to be dropped, but
were returning 0, which caused the to-be-dropped frames to be further
processed inside sae_rx_authenticate. Fix that by returning a proper
error.
Make sure to return -EAGAIN whenever a received frame from the peer
results in a retransmission. This also prevents the frame from being
mistakenly processed further in sae_rx_authenticate.
Do not try to transition to a new state from sae_send_commit /
sae_send_confirm since these methods can be called due to
retransmissions or other unexpected messages. Instead, transition to
the new state explicitly from sae_process_commit / sae_process_confirm.
SAE protocol is meant to authenticate peers simultaneously. Hence it
includes a tie-breaker provision in case both peers enter into the
Committed state and the Commit messages arrive at the respective peers
near simultaneously.
However, in the case of STA or Infrastructure mode, only one peer (STA)
would normally enter the Committed state (via Init) and the tie-breaker
provision is not needed. If this condition is detected, abort the
connection.
Also remove the uneeded group change check in process_commit.
sae_compute_pwe doesn't really depend on the state of sae_sm. Only the
curve to be used for the PWE calculation is needed. Rework the function
signature to reflect that and remove unneeded member of struct sae_sm.
ie_tlv_builder_init takes a size_t as input, yet for some reason
ie_tlv_builder_finalize takes an unsigned int argument as output. Fix
the latter to use size_t as well.
During processing of Connect events by netdev, some of these elements
might be updated even when already set. Instead of issuing
l_free/l_memdup each time, check and see whether the elements are
bitwise identical first.
Returns a template RSNX element that can be further modified by callers
to set any additional capabilities if required. wiphy will fill in
those capabilities that are driver / firmware dependent.
Most parameters set into the handshake object are actually known by the
network object itself and not station. This includes address
randomization settings, EAPoL settings, passphrase/psk/8021x settings,
etc. Since the number of these settings will only keep growing, move
the handshake setup into network itself. This also helps keep network
internals better encapsulated.
Refactor network_sync_psk to not require setting attributes into
multiple settings objects. This is in fact unnecessary as the parsed
security parameters are used everywhere else instead. Also make sure to
wipe the [Security] group first, in case any settings were invalid
during loading or otherwise invalidated.
Credentials obtained can now be either in passphrase or PSK form. Prior
to commit 7a9891dbef, passphrase credentials were always converted to
PSK form by invoking crypto_psk_from_passphrase. This was changed in
order to support WPA3 networks. Unfortunately the provisioning logic
was never properly updated. Fix that, and also try to not overwrite any
existing settings in case WSC is providing credentials for networks that
are already known.
Fixes: 7a9891dbef ("wsc: store plain text passphrase if available")
