The supplicant config generator emitted the phase2 directive as
phase2="auth=${auth}" for every PEAP/TTLS/FAST configuration. That is
wrong whenever the configured inner method is an EAP method: for
auth='EAP-MSCHAPV2' it produced phase2="auth=EAP-MSCHAPV2", which
wpa_supplicant rejects with:
TLS: Unsupported Phase2 EAP method 'EAP-MSCHAPV2'
breaking WPA-Enterprise clients that use an EAP inner method.
Mirror the shell config generator (hostapd.sh): strip the "EAP-" prefix
and pick the phase2 prefix from the method type, i.e. "autheap=" for a
tunneled EAP method with TTLS and "auth=" for a non-EAP method or a
full "auth=..." spec provided by the user.
Fixes: https://github.com/openwrt/openwrt/issues/24086
Fixes: c92ded2f6e ("wifi-scripts: fix EAP STA support in supplicant config generation")
Assisted-by: Claude:claude-opus-4-8
Link: https://github.com/openwrt/openwrt/pull/24088
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>