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Reverse Engineering Supermicro IPMI.
Supermicro enforces a vendor-lock in on BIOS updates via IPMI, even though they publish the update files for free here. The only free alternative is to time-travel to 1995 and boot from a DOS disk to supply the update. All other options (including the Supermicro Server Manager) require a license.
```sh
echo -n 'bmc-mac' | xxd -r -p | openssl dgst -sha1 -mac HMAC -macopt hexkey:8544E3B47ECA58F9583043F8 | awk '{print $2}' | cut -c 1-24
```
References that helped
I want to point out previous research work which helped me a lot.
- Getting a root shell on the IPMI
- binwalk Firmware Analysis Tool
