In the course of discussion of my proposed resolution for CID 408,
I said I could not find spec text that says that you discard unicast
robust Management frames that don't have a valid MIC.
The best I can find (for CCMP; presumably it's similar for GCMP) is:
12.5.2.4.2 CCM recipient processing
CCM recipient processing checks the authentication and integrity of the frame body and the AAD as well as decrypting the frame body. A MIC check
is performed by comparing the received MIC with a MIC calculated as described in 12.5.2.3 (CCMP cryptographic encapsulation). The plaintext is returned only if the MIC check is successful.
12.5.2.4.3 Decrypted CCMP MPDU
The decapsulation process succeeds when the calculated MIC (as described in 12.5.2.3 (CCMP cryptographic encapsulation)) matches the MIC value
obtained from decrypting the received encrypted MPDU. The original MPDU header is concatenated with the plaintext data resulting from the successful CCM recipient processing to create the plaintext MPDU.
but neither of these have an actual "shall". Am I missing something?
Thanks,
Mark
--
Mark RISON, Standards Architect, WLAN English/Esperanto/Français
Samsung Cambridge Solution Centre Tel: +44 1223 434600
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