cert-to-efi-sig-list(1) tool for converting openssl certificates to EFI signature lists


cert-to-efi-sig-list [,-g <guid>/] ,<crt file> <efi sig list file>/


Take an input X509 certificate (in PEM format) and convert it to an EFI signature list file containing only that single certificate


-g <guid>
Use <guid> as the owner of the signature. If this is not supplied, an all zero guid will be used


To take a standard X509 certificate in PEM format and produce an output EFI signature list file, simply do

cert-to-efi-sig-list PK.crt PK.esl

Note that the format of EFI signature list files is such that they can simply be concatenated to produce a file with multiple signatures:

cat PK1.esl PK2.esl > PK.esl

If your platform has a setup mode key manipulation ability, the keys will often only be displayed by GUID, so using the -g option to give your keys recognisable GUIDs will be useful if you plan to manage lots of keys.