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hostapd: Activate Simultaneous Authentication of Equals (SAE)

This build the full openssl and wolfssl versions with SAE support which
is the main part of WPA3 PSK.

This needs elliptic curve cryptography which is only provided by these
two external cryptographic libraries and not by the internal
implementation.

The WPA3_Specification_v1.0.pdf file says that in SAE only mode
Protected Management Frames (PMF) is required, in mixed mode with
WPA2-PSK PMF should be required for clients using SAE, and optional for
clients using WPA2-PSK. The defaults are set now accordingly.

This increases the ipkg size by 8.515 Bytes.
Old: 394.026 Bytes
New: 402.541 Bytes

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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hauke committed Oct 3, 2018
1 parent a1ad114 commit 4a009a16d2e87da3cd0b994934d3c3b76ca0455b
@@ -97,11 +97,11 @@ endif

ifeq ($(LOCAL_VARIANT),full)
ifeq ($(SSL_VARIANT),openssl)
DRIVER_MAKEOPTS += CONFIG_TLS=openssl
DRIVER_MAKEOPTS += CONFIG_TLS=openssl CONFIG_SAE=y
TARGET_LDFLAGS += -lcrypto -lssl
endif
ifeq ($(SSL_VARIANT),wolfssl)
DRIVER_MAKEOPTS += CONFIG_TLS=wolfssl CONFIG_WPS_NFC=1
DRIVER_MAKEOPTS += CONFIG_TLS=wolfssl CONFIG_WPS_NFC=1 CONFIG_SAE=y
TARGET_LDFLAGS += -lwolfssl
endif
endif
@@ -37,11 +37,26 @@ hostapd_append_wep_key() {
}

hostapd_append_wpa_key_mgmt() {
local auth_type="$(echo $auth_type | tr 'a-z' 'A-Z')"
local auth_type_l="$(echo $auth_type | tr 'a-z' 'A-Z')"

append wpa_key_mgmt "WPA-$auth_type"
[ "${ieee80211r:-0}" -gt 0 ] && append wpa_key_mgmt "FT-${auth_type}"
[ "${ieee80211w:-0}" -gt 0 ] && append wpa_key_mgmt "WPA-${auth_type}-SHA256"
case "$auth_type" in
psk|eap)
append wpa_key_mgmt "WPA-$auth_type_l"
[ "${ieee80211r:-0}" -gt 0 ] && append wpa_key_mgmt "FT-${auth_type_l}"
[ "${ieee80211w:-0}" -gt 0 ] && append wpa_key_mgmt "WPA-${auth_type_l}-SHA256"
;;
sae)
append wpa_key_mgmt "SAE"
[ "${ieee80211r:-0}" -gt 0 ] && append wpa_key_mgmt "FT-SAE"
;;
psk-sae)
append wpa_key_mgmt "WPA-PSK"
[ "${ieee80211r:-0}" -gt 0 ] && append wpa_key_mgmt "FT-PSK"
[ "${ieee80211w:-0}" -gt 0 ] && append wpa_key_mgmt "WPA-PSK-SHA256"
append wpa_key_mgmt "SAE"
[ "${ieee80211r:-0}" -gt 0 ] && append wpa_key_mgmt "FT-SAE"
;;
esac
}

hostapd_add_log_config() {
@@ -209,6 +224,8 @@ hostapd_common_add_bss_config() {
config_add_int mcast_rate
config_add_array basic_rate
config_add_array supported_rates

config_add_boolean sae_require_mfp
}

hostapd_set_bss_options() {
@@ -230,7 +247,7 @@ hostapd_set_bss_options() {
macfilter ssid wmm uapsd hidden short_preamble rsn_preauth \
iapp_interface eapol_version dynamic_vlan ieee80211w nasid \
acct_server acct_secret acct_port acct_interval \
bss_load_update_period chan_util_avg_period
bss_load_update_period chan_util_avg_period sae_require_mfp

set_default isolate 0
set_default maxassoc 0
@@ -284,6 +301,18 @@ hostapd_set_bss_options() {
append bss_conf "radius_acct_interim_interval=$acct_interval" "$N"
}

case "$auth_type" in
sae)
set_default ieee80211w 2
set_default sae_require_mfp 1
;;
psk-sae)
set_default ieee80211w 1
set_default sae_require_mfp 1
;;
esac
[ -n "$sae_require_mfp" ] && append bss_conf "sae_require_mfp=$sae_require_mfp" "$N"

local vlan_possible=""

case "$auth_type" in
@@ -293,7 +322,7 @@ hostapd_set_bss_options() {
# with WPS enabled, we got to be in unconfigured state.
wps_not_configured=1
;;
psk)
psk|sae|psk-sae)
json_get_vars key wpa_psk_file
if [ ${#key} -lt 8 ]; then
wireless_setup_vif_failed INVALID_WPA_PSK
@@ -709,7 +738,7 @@ wpa_supplicant_add_network() {
hostapd_append_wep_key network_data
append network_data "wep_tx_keyidx=$wep_keyidx" "$N$T"
;;
psk)
psk|sae|psk-sae)
local passphrase

if [ "$_w_mode" != "mesh" ]; then
@@ -26,6 +26,10 @@ static inline int has_feature(const char *feat)
#ifdef CONFIG_ACS
if (!strcmp(feat, "acs"))
return 1;
#endif
#ifdef CONFIG_SAE
if (!strcmp(feat, "sae"))
return 1;
#endif
return 0;
}

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