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netdev: relax requirement for OWE AKM in assoc reply

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Some APs don't include the RSNE in the associate reply during
the OWE exchange. This causes IWD to be incompatible since it has
a hard requirement on the AKM being included.

This relaxes the requirement for the AKM and instead warns if it
is not included.

Below is an example of an association reply without the RSN element

IEEE 802.11 Association Response, Flags: ........
     Type/Subtype: Association Response (0x0001)
     Frame Control Field: 0x1000
     .000 0000 0011 1100 = Duration: 60 microseconds
     Receiver address: 64:c4:03:88:ff:26
     Destination address: 64:c4:03:88:ff:26
     Transmitter address: fc:34:97:2b:1b:48
     Source address: fc:34:97:2b:1b:48
     BSS Id: fc:34:97:2b:1b:48
     .... .... .... 0000 = Fragment number: 0
     0001 1100 1000 .... = Sequence number: 456
IEEE 802.11 wireless LAN
     Fixed parameters (6 bytes)
     Tagged parameters (196 bytes)
         Tag: Supported Rates 6(B), 9, 12(B), 18, 24(B), 36, 48, 54, [Mbit/sec]
         Tag: RM Enabled Capabilities (5 octets)
         Tag: Extended Capabilities (11 octets)
         Ext Tag: HE Capabilities (IEEE Std 802.11ax/D3.0)
         Ext Tag: HE Operation (IEEE Std 802.11ax/D3.0)
         Ext Tag: MU EDCA Parameter Set
         Ext Tag: HE 6GHz Band Capabilities
         Ext Tag: OWE Diffie-Hellman Parameter
             Tag Number: Element ID Extension (255)
             Ext Tag length: 51
             Ext Tag Number: OWE Diffie-Hellman Parameter (32)
             Group: 384-bit random ECP group (20)
             Public Key: 14ba9d8abeb2ecd5d95e6c12491b16489d1bcc303e7a7fbd…
         Tag: Vendor Specific: Broadcom
         Tag: Vendor Specific: Microsoft Corp.: WMM/WME: Parameter Element

Reported-By: Wen Gong <quic_wgong@quicinc.com>
Tested-By: Wen Gong <quic_wgong@quicinc.com>
This commit is contained in:
James Prestwood 2023-07-13 07:42:37 -07:00 committed by Denis Kenzior
parent 7418c5fd3c
commit b736f07e2e
1 changed files with 6 additions and 2 deletions
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8
src/netdev.c
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@ -2911,11 +2911,15 @@ process_resp_ies:
}
if (netdev->owe_sm) {
if (!owe_dh || !owe_akm_found) {
l_error("OWE DH element/RSN not found");
if (!owe_dh) {
l_error("OWE DH element not found");
goto deauth;
}
if (!owe_akm_found)
l_warn("OWE AKM was not included in the RSNE. "
"This AP is out of spec!");
if (L_WARN_ON(owe_process_dh_ie(netdev->owe_sm, owe_dh,
owe_dh_len) != 0))
goto deauth;