All the "Failed to decrypt frame" debug prints were confusing since
those were not supposed to be shown unless there were one or more real
TKs available. The recently added check for zero TK added these notes
for that case which is not really correct, so get rid of them.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This makes it easier to analyze certain encryption issues. Also print
out an error at the default INFO debug verbosity with the frame number.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Previously, missing CCMP protection on Robust Management frames was
reported based on the STA having indicated MFPC=1. That is not accurate
since the AP/BSS may have MFPC=0. Report this failure only if both the
AP and STA have indicated MFPC=1, i.e., when PMF has been negotiated for
the association.
Signed-off-by: Jouni Malinen <j@w1.fi>
If no Beacon or Probe Response frame has been seen in the capture, use
the IEs from EAPOL-Key msg 3/4 to set up BSS information.
Signed-off-by: Jouni Malinen <j@w1.fi>
The previous implementation tried to update STA IE information based on
EAPOL-Key msg 2/4 to be able to handle captures that do not include the
(Re)Association Request frame. This was not sufficient (OSEN was not
included) and was done too late (the parsed information is needed for
PMK-to-PTK derivation).
Move the IE update step to happen before trying to derive the PTK if no
(Re)Association Request frame has been seen.
Signed-off-by: Jouni Malinen <j@w1.fi>
Fetch the BIGTK from EAPOL-Key msg 3/4 and use it to validate MME in
Beacon frames when the AP uses Beacon protection.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
wlantest build did not define build options to determine key management
values for SAE, OWE, and DPP. Add those and the needed SHA512 functions
to be able to decrypt sniffer captures with PMK available from an
external source.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Allow option (command line argument -e) to capture Ethernet headers
instead of IEEE 802.11 so that wlantest can be used as a replacement for
tcpdump/dumpcap for capturing.
Signed-off-by: Jouni Malinen <j@w1.fi>
This allows Data frames to be fully processed for the case where VLAN
tags are used on the wireless link.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Hardcode this to be defined and remove the separate build options for
PMF since this functionality is needed with large number of newer
protocol extensions and is also something that should be enabled in all
WPA2/WPA3 networks.
Signed-off-by: Jouni Malinen <j@w1.fi>
Track PMK-R0/PMK-R0-Name from the initial mobility domain association
and derive PMK-R1/PTK when the station uses FT protocol. This allows
frames from additional roaming cases to be decrypted.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
If a sniffer capture does not include FCS for each frame, but may
included frames with invalid FCS, it would be possible for wlantest to
try to decrypt the first received frame and fail (e.g., due to CCMP MIC
mismatch) because that particular frame was corrupted and then ignore
the following retry of that frame as a duplicate even if that retry has
different payload (e.g., if its reception did not show corruption).
Work around this by skipping duplicate frame detection immediately
following a decryption failure.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
DPP allows Diffie-Hellman exchange to be used for PFS in PTK derivation.
This requires an additional Z.x (x coordinate of the DH shared secret)
to be passed to wpa_pmk_to_ptk(). This commit adds that to the function
and updates all the callers to pass NULL,0 for that part in preparation
of the DPP specific changes to start using this.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Commit aab6612836 ('wlantest: Search
bss/sta entry more thoroughly for 4-address frames') allowed wlantest to
find a STA entry in this type of cases, but it was still possible for
that STA entry to be the one that has no derived PTK while the STA entry
for the other side of the link might have the derived PTK available.
Extend this BSS/STA selection mechanism to use sta->ptk_set to determine
which STA entry is more useful for decryption, i.e., select the one with
a known PTK.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Previous design worked for the case where only one of the devices was
beaconing, but failed in one direction to find the PTK if both devices
beaconed. Fix this by checking the A1/A2 fields in both directions if
the first pick fails to find the sta entry.
In addition, select the proper rsc value (rsc_tods vs. rsc_fromds) based
on A2 (TA) value for ToDS+FromDS frames to avoid reporting incorrect
replay issues.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
wlantest used to ignore RSN/WPA/OSEN element in (Re)Association Request
frame if no Beacon frame had been seen from the AP before the
association exchange. This could result in not being able to derive keys
properly. Work around this by skipping that step if the BSS entry is not
yet complete.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
The length of the TK is available within struct wpa_ptk, so there is no
need to try to maintain it separately in wlantest.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This changes wlantest behavior to mark CCMP/TKIP replays for more cases
in case a device is resetting its TSC. Previously, the RSC check got
cleared on the first marked replay and the following packets were not
marked as replays if they continued incrementing the PN even if that PN
was below the highest value received with this key at some point in the
past.
Signed-off-by: Jouni Malinen <j@w1.fi>
This covers the case where 4-address Data frames are exchanged between
an AP and an associated station.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This part is missing from IEEE Std 802.11ai-2016, but the lack of DHss
here means there would not be proper PFS for the case where PMKSA
caching is used with FILS SK+PFS authentication. This was not really the
intent of the FILS design and that issue was fixed during REVmd work
with the changes proposed in
https://mentor.ieee.org/802.11/dcn/17/11-17-0906-04-000m-fils-fixes.docx
that add DHss into FILS-Key-Data (and PTK, in practice) derivation for
the PMKSA caching case so that a unique ICK, KEK, and TK are derived
even when using the same PMK.
Note: This is not backwards compatible, i.e., this breaks PMKSA caching
with FILS SK+PFS if only STA or AP side implementation is updated.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Try to derive PTK when FILS shared key authentication is used without
PFS. The list of available PMKs is interpreted as rMSK for this purpose
and PMK and PTK is derived from that. If the resulting PTK (KEK) can be
used to decrypt the encrypted parts of (Re)Association Request/Response
frames, mark the PTK as derived so that encrypted frames during the
association can be decrypted. In addition, write a decrypted version of
the (Re)Association Request/Response frames into the output file.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
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 was only written to pcapng files if both pcap and pcapng writing
was requested. Fix this for the case where only a pcapng file is being
written.
Signed-off-by: Jouni Malinen <j@w1.fi>
This leads to cleaner code overall, and also reduces the size
of the hostapd and wpa_supplicant binaries (in hwsim test build
on x86_64) by about 2.5 and 3.5KiB respectively.
The mechanical conversions all over the code were done with
the following spatch:
@@
expression SIZE, SRC;
expression a;
@@
-a = os_malloc(SIZE);
+a = os_memdup(SRC, SIZE);
<...
if (!a) {...}
...>
-os_memcpy(a, SRC, SIZE);
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The new AEAD AKM option in FILS sets the MIC bit in EAPOL-Key frames to
0 for some ciphers, so the determination of EAPOL-Key frame types needs
changes to work with these cases.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Suite B 192-bit addition from IEEE Std 802.11ac-2013 replaced the
previous fixed length Key MIC field with a variable length field. That
change was addressed with an addition of a new struct defined for the
second MIC length. This is not really scalable and with FILS coming up
with a zero-length MIC case for AEAD, a more thorough change to support
variable length MIC is needed.
Remove the Key MIC and Key Data Length fields from the struct
wpa_eapol_key and find their location based on the MIC length
information (which is determined by the AKMP). This change allows the
separate struct wpa_eapol_key_192 to be removed since struct
wpa_eapol_key will now include only the fixed length fields that are
shared with all EAPOL-Key cases in IEEE Std 802.11.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This allows the CRC-32 routine to be shared for other purposes in
addition to the WEP/TKIP/FCS within wlantest.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
There is no strong need for pulling in linux/if_ether.h here since all
that is needed if ETH_P_IP and we already cover multiple other ETH_P_*
values in utils/common.h.
Signed-off-by: Jouni Malinen <j@w1.fi>
The addition operator is of higher precedence than the ternary
conditional and the construction here needs to use parentheses to
calculate the buffer length properly when generating test frames with
BIP protection.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This makes it easier to do live parsing of captured pcap files from
wlantest without having to rename and restart the capture file. Packet
writes are flushed to disk after each packet if -N is included in the
command line.
Signed-off-by: Jouni Malinen <j@w1.fi>
This adds minimal support for deriving keys for FT-PSK to allow the
initial mobility domain association to be analyzed in more detail.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
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>
