Commit graph

88 commits

Author SHA1 Message Date
Jouni Malinen
3c2fbe9f56 Discard unencrypted EAPOL-EAP when TK is set and PMF is enabled
RSN design is supposed to encrypt all Data frames, including EAPOL
frames, once the TK has been configured. However, there are deployed
implementations that do not really follow this design and there are
various examples from the older uses of EAPOL frame where those frames
were not encrypted. As such, strict filtering of unencrypted EAPOL
frames might results in undesired interoperation issues.

However, some of the most important cases of missing EAPOL frame
encryption should be possible to handle without causing too significant
issues. These are for cases where an attacker could potentially cause an
existing association to be dropped when PMF is used. EAP-Request is one
potential candidate for such attacks since that frame could be used to
initiate a new EAP authentication and the AP/Authenticator might not
allow that to complete or a large number of EAP-Request frames could be
injected to exceed the maximum number of EAP frames. Such an attack
could result in the station ending up disconnecting or at minimum,
getting into somewhat mismatching state with the AP.

Drop EAPOL-EAP frames when it is known that it was not encrypted but
should have been and when PMF is enabled. While it would be correct to
drop this even without PMF, that does not provide any significant
benefit since it is trivial to force disconnection in no-PMF cases. It
should also be noted that not all drivers provide information about the
encryption status of the EAPOL frames and this change has no impact with
drivers that do not indicate whether the frame was encrypted.

Signed-off-by: Jouni Malinen <j@w1.fi>
2022-05-07 21:37:08 +03:00
Jouni Malinen
18c0ac8901 Provide information about the encryption status of received EAPOL frames
This information was already available from the nl80211 control port RX
path, but it was not provided to upper layers within wpa_supplicant and
hostapd. It can be helpful, so parse the information from the driver
event.

Signed-off-by: Jouni Malinen <j@w1.fi>
2022-05-07 21:37:03 +03:00
Johannes Berg
1d0d8888af build: Make more library things common
We don't really need to duplicate more of this, so just
move the lib.rules include to the end and do more of the
stuff that's common anyway there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-10-12 20:20:35 +03:00
Johannes Berg
f4b3d14e97 build: Make a common library build
Derive the library name from the directory name, and let each
library Makefile only declare the objects that are needed.

This reduces duplicate code for the ar call. While at it, also
pretty-print that call.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-10-12 20:20:20 +03:00
Johannes Berg
87098d3324 build: Put archive files into build/ folder too
This is something I hadn't previously done, but there are
cases where it's needed, e.g., building 'wlantest' and then
one of the tests/fuzzing/*/ projects, they use a different
configuration (fuzzing vs. not fuzzing).

Perhaps more importantly, this gets rid of the last thing
that was dumped into the source directories, apart from
the binaries themselves.

Note that due to the use of thin archives, this required
building with absolute paths.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-10-11 11:16:00 +03:00
Johannes Berg
722138cd25 build: Put object files into build/ folder
Instead of building in the source tree, put most object
files into the build/ folder at the root, and put each
thing that's being built into a separate folder.

This then allows us to build hostapd and wpa_supplicant
(or other combinations) without "make clean" inbetween.

For the tests keep the objects in place for now (and to
do that, add the build rule) so that we don't have to
rewrite all of that with $(call BUILDOBJS,...) which is
just noise there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-10-10 12:51:39 +03:00
Johannes Berg
06a6adb54e build: Use build.rules in lib.rules
Use the new build.rules in lib.rules and also unify the
clean targets to lib.rules.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-10-10 12:47:41 +03:00
Jouni Malinen
da8478a1ab EAPOL supp: Convert Boolean to C99 bool
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2020-04-24 17:06:50 +03:00
Alexander Wetzel
fa1a6aff22 Fix unicast argument for set_wep_key() from EAPOL supplicant
The unicast parameter in set_wep_key() is only expected to be set to 0
or 1. Without this patch we set unicast to 0x80 instead of 1. Since
unicast is used as boolean that is working fine but violates the
documented API.

Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
2020-03-04 23:59:49 +02:00
Jouni Malinen
200c7693c9 Make WEP functionality an optional build parameter
WEP should not be used for anything anymore. As a step towards removing
it completely, move all WEP related functionality to be within
CONFIG_WEP blocks. This will be included in builds only if CONFIG_WEP=y
is explicitly set in build configuration.

Signed-off-by: Jouni Malinen <j@w1.fi>
2020-02-29 17:45:25 +02:00
Alexander Wetzel
1f90a49d02 STA: Allow PTK rekeying without Ext KeyID to be disabled as a workaround
Rekeying a pairwise key using only keyid 0 (PTK0 rekey) has many broken
implementations and should be avoided when using or interacting with
one. The effects can be triggered by either end of the connection and
range from hardly noticeable disconnects over long connection freezes up
to leaking clear text MPDUs.

To allow affected users to mitigate the issues, add a new configuration
option "wpa_deny_ptk0_rekey" to replace all PTK0 rekeys with fast
reconnects.

Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
2020-02-23 13:05:19 +02:00
Jouni Malinen
bc0634da4a Pass full struct to peer certificate callbacks
This makes it easier to add new information to the callbacks without
having to modify each callback function type in EAPOL and EAP code every
time.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2019-06-14 23:10:50 +03:00
Jouni Malinen
673631b8a3 More robust timer_tick_enabled tracking
Do not set sm->timer_tick_enabled if the eloop_register_timeout() call
fails so that the next attempt to enable the timer in
eapol_enable_timer_tick() can try to recover from unexpected eloop
failures. This should not really be needed in practical use cases, but
certain out-of-memory test cases can trigger allocation failure in
eloop_register_timeout() and if that happens, the previous EAPOL
supplicant state machine implementation got pretty much completely stuck
for any operation needing the timer.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2019-03-13 23:33:41 +02:00
Srikanth Marepalli
bd88ed60fa eap_proxy: Fix memory leaks when using eap_peer_erp_init()
The external session_id and emsk from eap_proxy_get_eap_session_id() and
eap_proxy_get_emsk() need to be freed consistently in all code paths
within eap_peer_erp_init() and outside it in the case ERP is not
initialized.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2018-09-21 21:34:08 +03:00
Ahmed ElArabawy
45f7574d31 Propagate the EAP method error code
In the current implementation, upon an EAP method failure, followed by
an EAP failure, the EAP Status is propagated up in wpa_supplicant with a
general failure parameter string "failure". This parameter is used for a
notification on the dbus.

This commit reports the EAP method failure error code in a separate
callback.

The solution in this commit is generic to all EAP methods, and can be
used by any method that need to pass its error code. However, this
commit only implements the reporting for EAP-SIM and EAP-AKA methods
where the Notification Code (in AT_NOTIFICATION) is used as the method
specific error code value.

Signed-off-by: Ahmed ElArabawy <arabawy@google.com>
2018-03-31 11:57:33 +03:00
Vidyullatha Kanchanapally
b5db6e5dc4 eap_proxy: Support multiple SIMs in get_imsi()
This allows the eap_proxy mechanism to be used with multiple SIMs by
following the configured sim_num to index which SIM to use for when
fetching the IMSI through eap_proxy.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-06-06 03:42:32 +03:00
Vidyullatha Kanchanapally
0020876514 eap_proxy: Build realm from IMSI for proxy based EAP methods
For proxy based EAP methods, the EAP identity is constructed in
eap_proxy layer from IMSI when required. Realm information from identity
is used to do ERP eventually, hence construct the realm for proxy based
methods from IMSI in core wpa_supplicant to enable the ERP use case.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-06-06 03:41:23 +03:00
Vidyullatha Kanchanapally
8696e61702 eap_proxy: Add support for deriving ERP information
This commit adds support for deriving ERP key information in EAP Proxy
based EAP method implementations.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-06-05 08:04:52 +03:00
Vidyullatha Kanchanapally
15def72fab ERP: External control of ERP key information
This allows ERP keys to be managed by external entities, e.g., when
offloading FILS shared key authentication to a driver.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-04-07 18:46:13 +03:00
Jouni Malinen
21fda4ee72 RSN: Fix pre-authentication EAPOL-Start startPeriod configuration
The RSN pre-authentication case ended up ignoring the initial
startPeriod value and delayed EAPOL-Start message by two seconds. Fix
this by forcing the first EAPOL-Start message to be sent when running
pre-authentication.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-02-20 12:48:04 +02:00
Jouni Malinen
e01cf2afc9 Define eapol_sm_get_eap_proxy_imsi() only with CONFIG_EAP_PROXY=y
This function is called only from locations within ifdef
CONFIG_EAP_PROXY, so there is no need to try to cover the not-defined
case here and the function can simply be removed completely if
CONFIG_EAP_PROXY=y is not used.

Signed-off-by: Jouni Malinen <j@w1.fi>
2017-02-19 12:28:33 +02:00
Jouni Malinen
95de34a10a Remove trailing whitespace
Signed-off-by: Jouni Malinen <j@w1.fi>
2016-12-28 14:31:42 +02:00
Purushottam Kushwaha
a6f3761f7d eap_proxy: Add support for SIM state change indication from eap_proxy
This registers a new callback to indicate change in SIM state. This
helps to do some clean up (more specifically pmksa_flush) based on the
state change of the SIM. Without this, the reconnection using the cached
PMKSA could happen though the SIM is changed.

Currently eap_proxy_sim_state corresponds to only SIM_STATE_ERROR. This
can be further extended.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-12-19 22:21:07 +02:00
Jouni Malinen
de57d87353 ERP: Make eap_peer_finish() callable
This is needed for FILS to process EAP-Finish/Re-auth.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-22 18:26:00 +03:00
Jouni Malinen
c28767e11c ERP: Make eap_peer_erp_reauth_start() available
This needs to be callable through the EAPOL supplicant wrappers to allow
FILS implementation to use ERP.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-22 18:25:50 +03:00
Jouni Malinen
25eb7fcbb4 Fix EAPOL reauth after FT protocol or offloaded PMKSA cache use
The EAP peer state machine moved from IDLE to FAILURE state when the
EAPOL Authenticator triggered reauthentication with an
EAP-Request/Identity in a case where the associated started with FT
protocol or offloaded PMKSA cache use (4-way handshake using a
previously acquired PMK). This happened due to the altSuccess=TRUE
setting being left behind and not cleared when processing the restart of
authentication. Fix this by clearing altAccept and eapSuccess when going
through SUPP_PAE RESTART state.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-11-19 21:16:18 +02:00
Jouni Malinen
7cb53ded11 Add build option to remove all internal RC4 uses
The new CONFIG_NO_RC4=y build option can be used to remove all internal
hostapd and wpa_supplicant uses of RC4. It should be noted that external
uses (e.g., within a TLS library) do not get disabled when doing this.

This removes capability of supporting WPA/TKIP, dynamic WEP keys with
IEEE 802.1X, WEP shared key authentication, and MSCHAPv2 password
changes.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-08-02 16:52:56 +03:00
Jouni Malinen
c8a15753eb Send EAPOL-Start on HELD->CONNECTING transition
Previously, only CONNECTING->CONNECTING case ended up sending out an
EAPOL-Start frame to avoid sending the unnecessary initial EAPOL-Start.
However, this optimization prevented new EAPOL-Start from being
initiated when leaving the HELD state. Allow that case to trigger
immediate EAPOL-Start transmission to speed up connection.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-07-07 19:25:31 +03:00
Mikael Kanstrup
8b423edbd3 Declare all read only data structures as const
By analysing objdump output some read only structures were found in
.data section. To help compiler further optimize code declare these
as const.

Signed-off-by: Mikael Kanstrup <mikael.kanstrup@sonymobile.com>
2015-04-25 17:33:06 +03:00
Jouni Malinen
46c3befe24 tests: Add eapol-fuzzer
This program can be used to run fuzzing tests for areas related to EAPOL
frame parsing and processing on the supplicant side.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-04-22 11:44:19 +03:00
Sunil Dutt
dd5c155e2e eap_proxy: Callback to notify any updates from eap_proxy
This commit introduces a callback to notify any configuration updates
from the eap_proxy layer. This is used to trigger re-reading of IMSI and
MNC length.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-03-02 12:47:20 +02:00
Jouni Malinen
ba4226130e Simplify eapol_sm_notify_pmkid_attempt()
Drop the unneeded 'attempt' argument. This was originally used for
indicating an aborted PMKID caching attempt, but a fix in 2006 removed
the only such user and since that time, only attempt == 1 has been used.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-01-28 13:09:31 +02:00
Jouni Malinen
993a865407 Add eap_session_id to wpa_supplicant STATUS output
This makes the current EAP Session-Id available for external programs.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-01-28 13:09:31 +02:00
Jouni Malinen
d07d3fbda2 Add peer certificate alt subject name information to EAP events
A new "CTRL-EVENT-EAP-PEER-ALT depth=<i> <alt name>" event is now used
to provide information about server certificate chain alternative
subject names for upper layers, e.g., to make it easier to configure
constraints on the server certificate. For example:
CTRL-EVENT-EAP-PEER-ALT depth=0 DNS:server.example.com

Currently, this includes DNS, EMAIL, and URI components from the
certificates. Similar information is priovided to D-Bus Certification
signal in the new altsubject argument which is a string array of these
items.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-01-14 15:45:18 +02:00
Jouni Malinen
d85e1fc8a5 Check os_snprintf() result more consistently - automatic 1
This converts os_snprintf() result validation cases to use
os_snprintf_error() where the exact rule used in os_snprintf_error() was
used. These changes were done automatically with spatch using the
following semantic patch:

@@
identifier E1;
expression E2,E3,E4,E5,E6;
statement S1;
@@

(
  E1 = os_snprintf(E2, E3, ...);
|
  int E1 = os_snprintf(E2, E3, ...);
|
  if (E5)
	E1 = os_snprintf(E2, E3, ...);
  else
	E1 = os_snprintf(E2, E3, ...);
|
  if (E5)
	E1 = os_snprintf(E2, E3, ...);
  else if (E6)
	E1 = os_snprintf(E2, E3, ...);
  else
	E1 = 0;
|
  if (E5) {
	...
	E1 = os_snprintf(E2, E3, ...);
  } else {
	...
	return -1;
  }
|
  if (E5) {
	...
	E1 = os_snprintf(E2, E3, ...);
  } else if (E6) {
	...
	E1 = os_snprintf(E2, E3, ...);
  } else {
	...
	return -1;
  }
|
  if (E5) {
	...
	E1 = os_snprintf(E2, E3, ...);
  } else {
	...
	E1 = os_snprintf(E2, E3, ...);
  }
)
? os_free(E4);
- if (E1 < 0 || \( E1 >= E3 \| (size_t) E1 >= E3 \| (unsigned int) E1 >= E3 \| E1 >= (int) E3 \))
+ if (os_snprintf_error(E3, E1))
(
  S1
|
{ ... }
)

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-12-08 11:42:07 +02:00
Jouni Malinen
65d9a5e254 ERP: Add wpa_supplicant ERP_FLUSH ctrl_iface command
This can be used to flush all the ERP keys.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-12-04 12:16:29 +02:00
Jouni Malinen
02a8d45ace ERP: Add support for ERP on EAP peer
Derive rRK and rIK on EAP peer if ERP is enabled. The new wpa_supplicant
network configuration parameter erp=1 can now be used to configure the
EAP peer to derive EMSK, rRK, and rIK at the successful completion of an
EAP authentication method. This functionality is not included in the
default build and can be enabled with CONFIG_ERP=y.

If EAP authenticator indicates support for re-authentication protocol,
initiate this with EAP-Initiate/Re-auth and complete protocol when
receiving EAP-Finish/Re-auth.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-12-04 12:16:29 +02:00
Justin Shen
3f7ac05878 WPS: Extend startWhen to 2 if peer AP supports WPS 2.0
Increase EAPOL startWhen to 2 for the case where the AP/GO has
advertised it supports WPS 2.0. This is done to make it less likely for
the EAPOL-Start frame to be sent out since that is only required for WPS
1.0. Not sending it can remove one unnecessary round trip from the EAP
exchange when the AP is going to start with EAP-Request/Identity
immediately based on the Association Request frame.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2014-10-13 12:24:17 +03:00
Jouni Malinen
07e2de3193 wpa_supplicant: Allow OpenSSL cipherlist string to be configured
The new openssl_cipher configuration parameter can be used to select
which TLS cipher suites are enabled for TLS-based EAP methods when
OpenSSL is used as the TLS library. This parameter can be used both as a
global parameter to set the default for all network blocks and as a
network block parameter to override the default for each network
profile.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-10-12 11:55:13 +03:00
Jouni Malinen
b08d5fa793 WPS: Set EAPOL workarounds dynamically based on association
Previously, the shorter startWhen value was used based on build
parameters (i.e., if WPS was enabled). This is not really ideal and the
knowledge of WPS use can be provided to the EAPOL state machine to allow
this (and similar WPS workarounds) to be done only when the association
is for the purpose of WPS.

Reduce the default startWhen value from 3 to 2 seconds for non-WPS case
since WPS builds have likely received most testing for the past years
with the 1 second value and there is no strong justification for forcing
the longer 3 second wait should a frame be lost or something else
require the EAPOL-Start to initiate operation after a connection.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2014-09-08 17:16:04 +03:00
Jouni Malinen
7c24f53c88 EAPOL supplicant: Use os_memcmp_const() for hash/password comparisons
This makes the implementation less likely to provide useful timing
information to potential attackers from comparisons of information
received from a remote device and private material known only by the
authorized devices.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-07-02 12:38:47 +03:00
Jouni Malinen
aa6bf6dabc eap_proxy: Check sm != NULL more consistently
While it does not look like that eapol_sm_get_key() would ever be called
with sm == NULL, the current implementation is inconsistent on whether
that is allowed or not. Check sm != NULL consistently to avoid warnings
from static analyzers.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-06-07 19:26:41 +03:00
Hu Wang
3bcfab8794 MACsec: Add define for EAPOL type MKA
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2014-05-09 20:05:28 +03:00
Hu Wang
49be483b28 Add function to fetch EAP Session-Id from EAPOL supplicant
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2014-05-09 20:05:28 +03:00
Jouni Malinen
c60ba9f7ab Skip network disabling on expected EAP failure
Some EAP methods can go through a step that is expected to fail and as
such, should not trigger temporary network disabling when processing
EAP-Failure or deauthentication. EAP-WSC for WPS was already handled as
a special case, but similar behavior is needed for EAP-FAST with
unauthenticated provisioning.

Signed-hostap: Jouni Malinen <j@w1.fi>
2014-01-08 16:42:15 +02:00
Jouni Malinen
466bcf99c3 Remove some unnecessary EAPOL port (un)authorized callbacks
If the port status did not change or would not need to get an update
after portEnabled changes, there is no need to try to set the driver to
use the same value it is already using based on the previous state.
Remove such calls to reduce number of operations during reassociation.
In addition, this cleans up the debug log by removing unnecessary
duplicated entries.

Signed-hostap: Jouni Malinen <j@w1.fi>
2014-01-02 23:49:38 +02:00
Jouni Malinen
7feff06567 Add CONFIG_CODE_COVERAGE=y option for gcov
This can be used to measure code coverage from test scripts.

Signed-hostap: Jouni Malinen <j@w1.fi>
2013-11-24 19:16:12 +02:00
Naresh Jayaram
fa56315cfc eap_proxy: Add context data pointer to the get_imsi call
This was already included in all the other calls to eap_proxy, but
somehow the get_imsi call had been forgotten.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-10-23 20:51:46 +03:00
Naresh Jayaram
07041c6f99 eap_proxy: Confirm eap_proxy initialization before reading SIM info
Trying to access the SIM card details without checking if the eap_proxy
layer has been initialized can results in a crash. Address this by
sending the request for the IMSI through eapol_supp_sm.c which can
verify that eap_proxy has been initialized.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-10-23 20:51:39 +03:00
Jouni Malinen
a5d44ac083 EAP peer: Add framework for external SIM/USIM processing
The new configuration parameter external_sim=<0/1> can now be used to
configure wpa_supplicant to use external SIM/USIM processing (e.g., GSM
authentication for EAP-SIM or UMTS authentication for EAP-AKA). The
requests and responses for such operations are sent over the ctrl_iface
CTRL-REQ-SIM and CTRL-RSP-SIM commands similarly to the existing
password query mechanism.

Changes to the EAP methods to use this new mechanism will be added in
separate commits.

Signed-hostap: Jouni Malinen <j@w1.fi>
2013-10-20 13:12:04 +03:00