Add partial support for decrypting captures with connections
established using FT BSS Transition (IEEE 802.11r).
FT BSS Transition decryption comes with the following limitations:
- Only FT-PSK is supported.
- Keys can only be derived from the FT 4-way handshake messages.
- Roaming is not supported.
Break out the PRF and KDF functionality from the PMK to PTK
derivation functions and make them separate utility functions
implemented as defined in the IEEE 802.11 standard.
This change is done in preparation for supporting additional
AKMS where the key derivation functions can be reused to derive
other type of keys.
The function to construct AAD is same for both CCMP and GCMP so move
it to a new internal utility c file for later use by both
implementations.
Change-Id: I8c8ffe0f492d5860e2bcd266b4d936383598b47e
Reviewed-on: https://code.wireshark.org/review/36358
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Moshe Kaplan