The Supermicro keys are:
HSDC Private Key: 39 CB 2A 1A 3D 74 8F F1 DE E4 6B 87
OOB Private Key: 85 44 E3 B4 7E CA 58 F9 58 30 43 F8


Reverse engineering:
Twitter use @Kleissner - https://peterkleissner.com/2018/05/27/reverse-engineering-supermicro-ipmi/ - Reverse Engineering Supermicro IPMI

Perl script:
Twitter user @astraleureka - Perl script for IPMI license
bwachter @ github.com - https://github.com/bwachter/supermicro-ipmi-key - Improved Perl script for IPMI license (usage: supermicro-ipmi-key AA:BB:CC:DD:EE:FF)

Python3 script:
Twitter user @dal000 - https://pud.se/~dal/smkeygen/ - Python3 script for IPMI license

Linux terminal command:
Twitter user @maniacnl - Linux terminal command for IPMI license
Anonymous @ techblog.jeppson.org - https://techblog.jeppson.org/2018/12/generate-supermicro-ipmi-license/ - Dash edition of Linux terminal command

Bash shell script:
Twitter user @zanejchua - https://cryptii.com/pipes/QiZmdA - Online generator for IPMI license
sixbux @ virtuallifestyle.nl - https://www.virtuallifestyle.nl/2016/08/better-way-update-supermicro-bios-via-ipmi/ - Bash shell script for IPMI license
Brian @ virtuallifestyle.nl - https://www.virtuallifestyle.nl/2016/08/better-way-update-supermicro-bios-via-ipmi/ - Bash  shell script for IPMI license (mod edition)
Robert @ virtuallifestyle.nl - https://www.virtuallifestyle.nl/2016/08/better-way-update-supermicro-bios-via-ipmi/ - Bash  shell script for IPMI license (activate.sh edition; need ipmitool installed, and sum required in current directory)
jeroen @ wiert.me - https://wiert.me/2020/09/14/supermicro-bios-update-youtube/ - Bash shell script for IPMI license (alternate edition)