Linux kernel v4.17 added the ability to request sending control port
frames via nl80211 instead of a normal network socket. Doing this
provides the device driver with ordering information between the
control port frames and the installation of keys. This empowers it to
avoid race conditions between, for example, PTK replacement and the
sending of frame 4 of the 4-way rekeying handshake in an RSNA. The
key difference between a TX_CONTROL_PORT and normal socket send is
that the device driver will certainly get any EAPOL frames comprising
a 4-way handshake before it gets the key installation call
for the derived key. By flushing its TX buffers it can then ensure
that no pending EAPOL frames are inadvertently encrypted with a key
that the peer will not yet have installed.
Update the RSN supplicant system to use this new operation for sending
EAPOL-Key frames when the driver reports that this capability is
available; otherwise, fall back to a normal Ethernet TX.
I have tested this on DMG (11ad/ay) devices with an out-of-tree Linux
driver that does not use mac80211. Without this patch I consistently see
PTK rekeying fail if message 4/4 shares a stream with other in-flight
traffic. With this patch, and the driver updated to flush the relevant TX
queue before overwriting a PTK (knowing, now, that if there was a message
4/4 related to the key installation, it has already entered the driver
queue), rekeying is reliable.
There is still data loss surrounding key installation - this problem is
alluded to in IEEE Std 802.11-2016, 12.6.21, where extended Key ID
support is described as the eventual solution. This patch aims to at
least prevent rekeying from totally breaking the association, in a way
that works on kernels as far back as 4.17 (as per Alexander Wetzel
extended Key ID support should be possible on 5.2).
See http://lists.infradead.org/pipermail/hostap/2019-May/040089.html for
a little more context.
Signed-off-by: Brendan Jackman <brendan.jackman@bluwireless.co.uk>
If the AP advertises RSN Extension element, it has to be advertised
consistently in the unprotected (Beacon and Probe Response) and
protected (EAPOL-Key msg 3/4) frames. Verify that this is the case.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
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>
These cases are for the IEEE 802.11 Status Code and Reason Code and
those fields are unsigned 16 bit values, so use the more appropriate
type consistently. This is mainly to document the uses and to make the
source code easier to understand.
Signed-off-by: Jouni Malinen <j@w1.fi>
Allow drivers to indicate support for offloading 4-way handshake for
either IEEE 802.1X (WPA2-Enterprise; EAP) and/or WPA/WPA2-PSK
(WPA2-Personal) by splitting the WPA_DRIVER_FLAGS_4WAY_HANDSHAKE flag
into two separate flags.
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
This adds the necessary functions and callbacks to make the channel_info
driver API available to the supplicant state machine that implements the
4-way and group key handshake. This is needed for OCV.
Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be>
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>
This can be used to test replay protection. The "RESET_PN" command in
wpa_supplicant and "RESET_PN <addr>" command in hostapd resets the local
counters to zero for the last configured key. For hostapd, the address
parameter specifies which STA this operation is for or selects GTK
("ff:ff:ff:ff:ff:ff") or IGTK ("ff:ff:ff:ff:ff:ff IGTK").
This functionality is for testing purposes and included only in builds
with CONFIG_TESTING_OPTIONS=y.
Signed-off-by: Jouni Malinen <j@w1.fi>
This was originally added to allow the IEEE 802.11 protocol to be
tested, but there are no known fully functional implementations based on
this nor any known deployments of PeerKey functionality. Furthermore,
PeerKey design in the IEEE Std 802.11-2016 standard has already been
marked as obsolete for DLS and it is being considered for complete
removal in REVmd.
This implementation did not really work, so it could not have been used
in practice. For example, key configuration was using incorrect
algorithm values (WPA_CIPHER_* instead of WPA_ALG_*) which resulted in
mapping to an invalid WPA_ALG_* value for the actual driver operation.
As such, the derived key could not have been successfully set for the
link.
Since there are bugs in this implementation and there does not seem to
be any future for the PeerKey design with DLS (TDLS being the future for
DLS), the best approach is to simply delete all this code to simplify
the EAPOL-Key handling design and to get rid of any potential issues if
these code paths were accidentially reachable.
Signed-off-by: Jouni Malinen <j@w1.fi>
This new AKM is used with DPP when using the signed Connector to derive
a PMK. Since the KCK, KEK, and MIC lengths are variable within a single
AKM, this needs number of additional changes to get the PMK length
delivered to places that need to figure out the lengths of the PTK
components.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
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>
Add support for setting and deleting PMKSA cache entries based on FILS Cache
Identifer. Also additionally add support for sending PMK as part of
SET_PMKSA to enable driver to derive keys in case of FILS shared key
offload using PMKSA caching.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This allows PMKSA cache entries for FILS-enabled BSSs to be shared
within an ESS when the BSSs advertise the same FILS Cache Identifier
value.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
The new FILS-HLP-RX control interface event is now used to report
received FILS HLP responses from (Re)Association Response frame as a
response to the HLP requests configured with FILS_HLP_REQ_ADD.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Previously, SIM state change with SIM_STATE_ERROR cleared all PMKSA
entries (including non-SIM networks). Limit this to networks which use
SIM-based authentication methods to avoid unnecessarily removal of PMKSA
entries.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
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>
These allow external program to monitor PMKSA cache updates in
preparation to enable external persistent storage of PMKSA cache.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This adds support for optional functionality to validate server
certificate chain in TLS-based EAP methods in an external program.
wpa_supplicant control interface is used to indicate when such
validation is needed and what the result of the external validation is.
This external validation can extend or replace the internal validation.
When ca_cert or ca_path parameter is set, the internal validation is
used. If these parameters are omitted, only the external validation is
used. It needs to be understood that leaving those parameters out will
disable most of the validation steps done with the TLS library and that
configuration is not really recommend.
By default, the external validation is not used. It can be enabled by
addingtls_ext_cert_check=1 into the network profile phase1 parameter.
When enabled, external validation is required through the CTRL-REQ/RSP
mechanism similarly to other EAP authentication parameters through the
control interface.
The request to perform external validation is indicated by the following
event:
CTRL-REQ-EXT_CERT_CHECK-<id>:External server certificate validation needed for SSID <ssid>
Before that event, the server certificate chain is provided with the
CTRL-EVENT-EAP-PEER-CERT events that include the cert=<hexdump>
parameter. depth=# indicates which certificate is in question (0 for the
server certificate, 1 for its issues, and so on).
The result of the external validation is provided with the following
command:
CTRL-RSP-EXT_CERT_CHECK-<id>:<good|bad>
It should be noted that this is currently enabled only for OpenSSL (and
BoringSSL/LibreSSL). Due to the constraints in the library API, the
validation result from external processing cannot be reported cleanly
with TLS alert. In other words, if the external validation reject the
server certificate chain, the pending TLS handshake is terminated
without sending more messages to the server.
Signed-off-by: Jouni Malinen <j@w1.fi>
Number of places were calling functions that are not included in
CONFIG_NO_WPA=y build anymore. Comment out such calls. In addition, pull
in SHA1 and MD5 for config_internal.c, if needed.
Signed-off-by: Jouni Malinen <j@w1.fi>
Some APs may send RSC octets in EAPOL-Key message 3 of 4-Way Handshake
or in EAPOL-Key message 1 of Group Key Handshake in the opposite byte
order (or by some other corrupted way). Thus, after a successful
EAPOL-Key exchange the TSC values of received multicast packets, such as
DHCP, don't match the RSC one and as a result these packets are dropped
on replay attack TSC verification. An example of such AP is Sapido
RB-1732.
Work around this by setting RSC octets to 0 on GTK installation if the
AP RSC value is identified as a potentially having the byte order issue.
This may open a short window during which older (but valid)
group-addressed frames could be replayed. However, the local receive
counter will be updated on the first received group-addressed frame and
the workaround is enabled only if the common invalid cases are detected,
so this workaround is acceptable as not decreasing security
significantly. The wpa_rsc_relaxation global configuration property
allows the GTK RSC workaround to be disabled if it's not needed.
Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Previously, it was possible for the set_key() handler to be used with
WPA_ALG_PMK even if the driver did not indicate support for key
management offload. While this is not really supposed to result in any
difference, it makes the debug logs somewhat confusing. Avoid that by
using driver capability flag for key management offload as an additional
condition for setting the PMK.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
The new network profile parameter mem_only_psk=1 can be used to specify
that the PSK/passphrase for that network is requested over the control
interface (ctrl_iface or D-Bus) similarly to the EAP network parameter
requests. The PSK/passphrase can then be configured temporarily in a way
that prevents it from getting stored to the configuration file.
For example:
Event:
CTRL-REQ-PSK_PASSPHRASE-0:PSK or passphrase needed for SSID test-wpa2-psk
Response:
CTRL-RSP-PSK_PASSPHRASE-0:"qwertyuiop"
Note: The response value uses the same encoding as the psk network
profile parameter, i.e., passphrase is within double quotation marks.
Signed-off-by: Jouni Malinen <j@w1.fi>
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>
This modifies struct wpa_ptk to allow the length of KCK and KEK to be
stored. This is needed to allow longer keys to be used, e.g., with
Suite B 192-bit level.
Signed-off-by: Jouni Malinen <j@w1.fi>
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>
This makes it easier for upper layer applications to get information
regarding the server certificate without having to use a special
certificate probing connection. This provides both the SHA256 hash of
the certificate (to be used with ca_cert="hash://server/sha256/<hash>",
if desired) and the full DER encoded X.509 certificate so that upper
layer applications can parse and display the certificate easily or
extract fields from it for purposes like configuring an altsubject_match
or domain_suffix_match.
The old behavior can be configured by adding cert_in_cb=0 to
wpa_supplicant configuration file.
Signed-off-by: Jouni Malinen <j@w1.fi>
The supplicant code does not try to control the actual channel of the
radio at any point. It simply passes the target peer and channel
parameters to the driver. It's the driver's responsibility to
periodically initiate TDLS channel-switch operations when TDLS
channel-switching is enabled.
Allow enable/disable operations to be invoked via the control interface.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
The send_eapol() callback was used by driver_test.c, but with that
removed, there is no remaining users of the alternative EAPOL frame
transmitting mechanism in wpa_supplicant, i.e., all remaining driver
interfaces use l2_packet instead. Remove the send_eapol() to get rid of
unused code.
Signed-off-by: Jouni Malinen <j@w1.fi>
This reduced number of unnecessarily duplicated driver interface
callback functions for sending Action frames by using the more generic
send_action() instead of FT specific send_ft_action().
Signed-off-by: Jouni Malinen <j@w1.fi>
This commit introduces a QCA vendor command and event to provide an
option to use extended versions of the nl80211 connect/roam operations
in a way that allows drivers to offload key management operations to the
driver/firmware.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
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>
The new ext_eapol_frame_io parameter can be used to configure hostapd
and wpa_supplicant to use control interface for receiving and
transmitting EAPOL frames. This makes it easier to implement automated
test cases for protocol testing. This functionality is included only in
CONFIG_TESTING_OPTIONS=y builds.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Relying on qos qosinfo is not enough, as it can be 0 for WMM enabled
peers that don't support U-APSD. Further, some peers don't even contain
this IE (Google Nexus 5), but do contain the WMM IE during setup.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Some drivers need to know the initiator of a TDLS connection in order
to generate a correct TDLS mgmt packet. It is used to determine
the link identifier IE. Pass this information to the driver.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
An interoperability issue with a deployed AP has been identified where
the connection fails due to that AP failing to operate correctly if
PMKID is included in the Association Request frame. To work around this,
allow EAPOL-Start packet to be transmitted on startWhen reaching 0 even
when trying to use PMKSA caching. In practice, this allows fallback to
full EAP authentication if the AP/Authenticator takes more than 1-2
seconds to initiate 4-way handshake for PMKSA caching or full EAP
authentication if there was no PMKSA cache match.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
While framing the TDLS Setup Confirmation frame, the driver needs to
know if the TDLS peer is VHT/HT/WMM capable and thus shall construct the
VHT/HT operation / WMM parameter elements accordingly. Supplicant
determines if the TDLS peer is VHT/HT/WMM capable based on the presence
of the respective IEs in the received TDLS Setup Response frame.
The host driver should not need to parse the received TDLS Response
frame and thus, should be able to rely on the supplicant to indicate
the capability of the peer through additional flags while transmitting
the TDLS Setup Confirmation frame through tdls_mgmt operations.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This new mechanism allows P2P Client to request an IPv4 address from the
GO as part of the 4-way handshake to avoid use of DHCP exchange after
4-way handshake. If the new mechanism is used, the assigned IP address
is shown in the P2P-GROUP-STARTED event on the client side with
following new parameters: ip_addr, ip_mask, go_ip_addr. The assigned IP
address is included in the AP-STA-CONNECTED event on the GO side as a
new ip_addr parameter. The IP address is valid for the duration of the
association.
The IP address pool for this new mechanism is configured as global
wpa_supplicant configuration file parameters ip_addr_go, ip_addr_mask,
ip_addr_star, ip_addr_end. For example:
ip_addr_go=192.168.42.1
ip_addr_mask=255.255.255.0
ip_addr_start=192.168.42.2
ip_addr_end=192.168.42.100
DHCP mechanism is expected to be enabled at the same time to support P2P
Devices that do not use the new mechanism. The easiest way of managing
the IP addresses is by splitting the IP address range into two parts and
assign a separate range for wpa_supplicant and DHCP server.
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
The information of the peer's supported channel and operating class
is required for the driver to do TDLS off channel operations with a
compatible peer. Pass this information to the driver when the peer
station is getting added.
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
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>
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>
This can be useful for some test cases, so allow wpa_supplicant to be
built with special test functionality to expose the current (last
configured) GTK. This is disabled by default and can be enabled by
adding following line into .config:
CFLAGS += -DCONFIG_TESTING_GET_GTK
The GTK can then be fetched with "wpa_cli get gtk".
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
The use of AID=1 for the nl80211 dummy STA case is specific to the
driver (cfg80211), so better move this into the driver wrapper instead
of generic TDLS implementation.
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
