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SAE-PK: Select SAE-PK network over SAE without PK

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If there is an acceptable BSS with SAE-PK enabled in the same ESS,
select that over a BSS that does not enable SAE-PK when the network
profile uses automatic SAE-PK selection.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2020-06-07 16:49:07 +03:00 committed by Jouni Malinen
parent d654ca24de
commit 5f48d36b4a
1 changed files with 59 additions and 0 deletions
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59
wpa_supplicant/events.c
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@ -1083,6 +1083,51 @@ static int disabled_freq(struct wpa_supplicant *wpa_s, int freq)
}
static bool wpa_scan_res_ok(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
const u8 *match_ssid, size_t match_ssid_len,
struct wpa_bss *bss, struct wpa_blacklist *e,
bool debug_print);
#ifdef CONFIG_SAE_PK
static bool sae_pk_acceptable_bss_with_pk(struct wpa_supplicant *wpa_s,
struct wpa_bss *orig_bss,
struct wpa_ssid *ssid,
const u8 *match_ssid,
size_t match_ssid_len)
{
struct wpa_bss *bss;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
struct wpa_blacklist *e;
const u8 *ie;
u8 rsnxe_capa = 0;
if (bss == orig_bss)
continue;
ie = wpa_bss_get_ie(bss, WLAN_EID_RSNX);
if (ie && ie[1] >= 1)
rsnxe_capa = ie[2];
if (!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK)))
continue;
/* TODO: Could be more thorough in checking what kind of
* signal strength or throughput estimate would be acceptable
* compared to the originally selected BSS. */
if (bss->est_throughput < 2000)
return false;
e = wpa_blacklist_get(wpa_s, bss->bssid);
if (wpa_scan_res_ok(wpa_s, ssid, match_ssid, match_ssid_len,
bss, e, 0))
return true;
}
return false;
}
#endif /* CONFIG_SAE_PK */
static bool wpa_scan_res_ok(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
const u8 *match_ssid, size_t match_ssid_len,
struct wpa_bss *bss, struct wpa_blacklist *e,
@ -1392,6 +1437,20 @@ skip_assoc_disallow:
}
#endif /* CONFIG_DPP */
#ifdef CONFIG_SAE_PK
if (ssid->sae_pk == SAE_PK_MODE_AUTOMATIC &&
wpa_key_mgmt_sae(ssid->key_mgmt) &&
ssid->sae_password && sae_pk_valid_password(ssid->sae_password) &&
!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK)) &&
sae_pk_acceptable_bss_with_pk(wpa_s, bss, ssid, match_ssid,
match_ssid_len)) {
if (debug_print)
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - another acceptable BSS with SAE-PK in the same ESS");
return false;
}
#endif /* CONFIG_SAE_PK */
/* Matching configuration found */
return true;
}