[PATCHv7 2/8] FT: New RRB message format

[Nicolas Cavallari]

On 22/04/2017 10:46, Michael Braun wrote:
> Convert FT RRB into a new TLV based format. Use AES-SIV as AEAD cipher
> to protect the messages.
> 
> This needs at least 32 byte long keys. These can be provided either
> by a config file change or letting a KDF derive the 32 byte key used
> from the 16 byte key given.
> 
> This breaks backward compatibility, i.e., hostapd needs to be updated on
> all APs at the same time to allow FT to remain functional.
> 
> Signed-off-by: Michael Braun <michael-dev at fami-braun.de>

Hello,

This commit and 1/8 breaks the build of wpa_supplicant if one enables
CONFIG_IEEE80211R_AP, since you forgot to update the wpa_supplicant
build system.  The build failure look like this:

../src/ap/wpa_auth_ft.o: In function `wpa_ft_rrb_encrypt':
wpa_supplicant/../src/ap/wpa_auth_ft.c:298: undefined reference to
`aes_siv_encrypt'
../src/ap/wpa_auth_ft.o: In function `wpa_ft_rrb_decrypt':
wpa_supplicant/../src/ap/wpa_auth_ft.c:96: undefined reference to
`aes_siv_decrypt'
collect2: error: ld returned 1 exit status

It is also possible that it does not work at runtime, since you added
initialization code in hostapd and not in wpa_supplicant. At first
glance, it seems wpa_supplicant does not have a hostapd_interfaces
structure, and hapd->iface->interfaces seems to be NULL.

In my case, CONFIG_IEEE80211R_AP was enabled by accident, so disabling
it fixes it.  But i think this issue deserve a fix.