Got tired of not being able to update my BIOS via the BMC on my Supermicro boxes. Apparently this wasn’t a well kept secret. Thanks to Peter for this and sorry he had such a bad time, but good news is it’s now an easy fix. His post is here. Below if you just want to run it in a shell. Thanks Nick. Replace the beef with your actual MAC address.
echo -n 'BAADDEADBEEF' | xxd -r -p | openssl dgst -sha1 -mac HMAC -macopt hexkey:8544E3B47ECA58F9583043F8 | awk '{print $2}' | cut -c 1-24