tree befc88c0ab3c8e2d82cd593f01dcceb3c52e0822
parent 37df134b3b1ffc2f8013aae5bc22fa4e51c250a2
author Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be> 1506651771 +0200
committer Glen Kuhne <kuh@google.com> 1507833380 -0700

Prevent installation of an all-zero TK

Properly track whether a PTK has already been installed to the driver
and the TK part cleared from memory. This prevents an attacker from
trying to trick the client into installing an all-zero TK.

This fixes the earlier fix in commit
ad00d64e7d8827b3cebd665a0ceb08adabf15e1e ('Fix TK configuration to the
driver in EAPOL-Key 3/4 retry case') which did not take into account
possibility of an extra message 1/4 showing up between retries of
message 3/4.

Bug: 65245581
Test: Wifi Integration suite
Merged-In: If3e736da9a822635551b72074e8f7c3f4d921e87
Change-Id: If3e736da9a822635551b72074e8f7c3f4d921e87
Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be>
Signed-off-by: Glen Kuhne <kuh@google.com>