From: Sai Pratyusha Magam <quic_smagam@quicinc.com>
Date: Thu, 9 May 2024 09:46:29 +0000 (+0530)
Subject: PASN: Derive KDK on AP only when both ends support SecureLTF
X-Git-Tag: hostap_2_11~40
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b745cd33efb463109f7f10e9018aaa8cb71097a7;p=thirdparty%2Fhostap.git

PASN: Derive KDK on AP only when both ends support SecureLTF

On the AP responder side, KDK was derived if the driver advertises
WPA_DRIVER_FLAGS2_SEC_LTF_AP. That is not correct, i.e., this needs to
also depend on the initiator indicating support for this in the RSNXE of
PASN authentication frame 1.

Signed-off-by: Sai Pratyusha Magam <quic_smagam@quicinc.com>
---

diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c
index 7592ba998..2d361fc59 100644
--- a/src/ap/ieee802_11.c
+++ b/src/ap/ieee802_11.c
@@ -2701,6 +2701,14 @@ static void hapd_pasn_update_params(struct hostapd_data *hapd,
 	pasn_set_akmp(pasn, rsn_data.key_mgmt);
 	pasn_set_cipher(pasn, rsn_data.pairwise_cipher);
 
+	if (pasn->derive_kdk &&
+	    !ieee802_11_rsnx_capab_len(elems.rsnxe, elems.rsnxe_len,
+				       WLAN_RSNX_CAPAB_SECURE_LTF))
+		pasn_disable_kdk_derivation(pasn);
+#ifdef CONFIG_TESTING_OPTIONS
+	if (hapd->conf->force_kdk_derivation)
+		pasn_enable_kdk_derivation(pasn);
+#endif /* CONFIG_TESTING_OPTIONS */
 	akmp = pasn_get_akmp(pasn);
 
 	if (wpa_key_mgmt_ft(akmp) && rsn_data.num_pmkid) {