WPA3 support (LP: #2023238)

[daniloegea]

Related to https://bugs.launchpad.net/netplan/+bug/2023238

Description

The following wpa_supplicant configuration is required to connect to a WPA3 network:

network={
	ssid="WPA3-Network"
	psk="abcdefgh"
	key_mgmt=SAE
	ieee80211w=2
}

From the wpa_supplicant.conf manual:

# SAE = Simultaneous authentication of equals; pre-shared key/password -based
#	authentication with stronger security than WPA-PSK especially when using
#	not that strong password; a.k.a. WPA3-Personal
...
...
# ieee80211w: whether management frame protection is enabled
# 0 = disabled (default unless changed with the global pmf parameter)
# 1 = optional
# 2 = required
# The most common configuration options for this based on the PMF (protected
# management frames) certification program are:
# PMF enabled: ieee80211w=1 and key_mgmt=WPA-EAP WPA-EAP-SHA256
# PMF required: ieee80211w=2 and key_mgmt=WPA-EAP-SHA256
# (and similarly for WPA-PSK and WPA-PSK-SHA256 if WPA2-Personal is used)
# WPA3-Personal-only mode: ieee80211w=2 and key_mgmt=SAE

It was tested with a WPA3 only network configured with hostapd using both renderers.

The integration with Network Manager (netplan everywhere) was also tested.

Checklist

• Runs make check successfully.
• Retains 100% code coverage (make check-coverage).
• New/changed keys in YAML format are documented.
• (Optional) Adds example YAML for new feature.
• (Optional) Closes an open bug in Launchpad.

[slyon]

Thanks, LGTM!

I left one little inline comment, which we might want to resolve before merging.

[slyon]

FTR: See #402 for WPA3 Enterprise