usage: virt-fw-sigdb [-h] [-i FILE] [-o FILE] [--add-cert GUID FILE] [--add-hash GUID HASH] [-x]
                     [-p]

options:
  -h, --help            show this help message and exit
  -i FILE, --input FILE
                        read efi sigdb FILE
  -o FILE, --output FILE
                        write efi sigdb FILE.
  --add-cert GUID FILE  add x509 cert to sigdb, loaded in pem format from FILE and with owner
                        GUID, can be specified multiple times
  --add-hash GUID HASH  add sha256 hash to sigdb, with owner GUID, can be specified multiple times
  -x, --extract         extract certificates
  -p, --print           print sigdb