man pages on WPA are updated in 4.3 current.
You can use the following procedure from the command line to tell your interface (call it
ral0 for the purpose of the example) to connect using WPA.
Step 1 Generate wpapsk as
Code:
$ wpa-psk <Your SSID> <Your passphrase>
Step 2
Code:
# ifconfig ral0 wpa wpapsk 0xa5499c66926f5b9679c... (where this hexadecimal number is output of the step one)
Code:
dhclient ral0 (if your access point issues leases as DHCP server)