86b9eec8f0
The WPA3 and Wi-Fi Enhanced Open Deployment and Implementation Guide v1.1 §2.4 (Tables 6 and 7) defines WPA3-Personal Compatibility Mode: the AP advertises a legacy-looking RSNE (WPA-PSK, CCMP-128, PMF Disabled) while RSN Override Elements layered on top expose SAE and, on EHT, SAE-EXT-KEY. WPA2-only STAs and STAs that ignore RSN Overriding associate unchanged; modern STAs pick up the stronger WPA3 AKM via RSNOE or RSNO2E. Only the pairwise cipher differs between elements: RSNE and RSNOE advertise CCMP-128, RSNO2E advertises GCMP-256 (EHT only). Group data (CCMP-128) and group management cipher (BIP-CMAC-128) are the same in all three per Tables 6/7, so hostapd's BSS-wide group_cipher and group_mgmt_cipher singletons produce the spec-correct values. Unlike WPA3-Personal Transition Mode (sae-mixed), which puts PSK and SAE together in the main RSNE with PMF Capable, Compatibility Mode keeps the main RSNE strictly WPA2-shaped so clients that choke on a mixed AKM list or PMF=Capable still see a pure WPA2 BSS. The trade- off is that clients without RSN Overriding support never pick up SAE. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> Link: https://github.com/openwrt/openwrt/pull/23009 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> |
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