%all.entities; ]> $Date: 2023-01-17 14:15:46 +0000 (Tue, 17 Jan 2023) $ VBoxManage-modifynvram 1 VBoxManage-modifynvram List and modify the NVRAM content of a virtual machine &product-name; VBoxManage modifynvram uuid|vmname inituefivarstore VBoxManage modifynvram uuid|vmname enrollmssignatures VBoxManage modifynvram uuid|vmname enrollorclpk VBoxManage modifynvram uuid|vmname enrollpk --platform-key=filename --owner-uuid=uuid VBoxManage modifynvram uuid|vmname listvars VBoxManage modifynvram uuid|vmname queryvar --name=name --filename=filename VBoxManage modifynvram uuid|vmname deletevar --name=name --owner-uuid=uuid VBoxManage modifynvram uuid|vmname changevar --name=name --filename=filename The "modifynvram" commands are for experts who want to inspect and modify the UEFI variable store of a virtual machine. Any mistakes done here can bring the virtual machine in a non working state. The subcommands of modifynvram all operate on a running virtual machine: uuid|vmname Either the UUID or the name (case sensitive) of a VM. Iniitalizes the UEFI variable store to a default state. Any previous existing variable store is deleted. Use with extreme caution! Enrolls the default Microsoft KEK and DB signatures required for UEFI secure boot. Enrolls the default platform key provided by Oracle required for UEFI secure boot. Enrolls a custom platform key provided by the user required for UEFI secure boot. The following commands use openssl to generate a new platform key: $ openssl req -new -x509 -newkey rsa:2048 -keyout PK.key -out PK.crt $ openssl x509 -in PK.crt -out PK.cer -outform DER --platform-key=filename The platform key provided as a DER encoded X.509 signature. --owner-uuid=uuid The UUID identifying the owner of the platform key. Lists all UEFI variables in the virtual machines's store along with their owner UUID. Queries the content of a given UEFI variable identified by its name. --name=name UEFI variable name to query. --filename=filename Where to store the content of the variable upon success. This is optional, if omitted the content will be dumped to the terminal as a hex dump. Deletes the given variable identified by its name and owner UUID. --name=name UEFI variable name to delete. --owner-uuid=uuid The UUID identifying the owner of the variable to delete. Changes the UEFI variable content to the one form the given file. --name=name UEFI variable name to change the data for. --filename=filename The file to read the data from.