This is the command efi-updatevar that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
efi-updatevar - tool for updating secure variables
SYNOPSIS
efi-updatevar: [-a] [-e] [-d <list>[-<entry>]] [-k <key>] [-g <guid>] [-b <file>|-f
<file>|-c file] <var>
DESCRIPTION
Takes a variety of input files and adds them to one of the UEFI secure boot signature or
key databases.
Note that the efivarfs filesystem must be mounted somewhere on the box and efi-updatevars
must have the ability to write to the files (this usually means it must run as root).
Manipulate the UEFI key database via the efivarfs filesystem
OPTIONS
-a append a value to the variable instead of replacing it
-e use EFI Signature List instead of signed update (only works in Setup Mode
-b <binfile>
Add hash of <binfile> to the signature list
-f <file>
Add or Replace the key file (.esl or .auth) to the <var>
-c <file>
Add or Replace the x509 certificate to the <var> (with <guid> if provided)
-g <guid>
Optional <guid> for the X509 Certificate
-k <key>
Secret key file for authorising User Mode updates
-d <list>[-<entry>]
Delete the signature list <list> (or just a single <entry> within the list)
EXAMPLES
Assuming you own your own platform key and have the PK.auth and noPK.auth files which go
with it, you can programmatically move the system out of User Mode by doing
efi-updatevar -f noPK.auth PK
and put it back again with
efi-updatevar -f PK.auth PK
To add the hash of an efi binary bin.efi to db in Setup Mode do
efi-updatevar -b bin.efi db
And to append an EFI signature list append.esl to db in Setup Mode do
efi-updatevar -a -e append.esl db
To add your key (KEK.crt) to the Key Exchange Key in User Mode, assuming the private part
of the platform key is in PK.key, do
efi-updatevar -a -c KEK.crt -k PK.key KEK
To add certificate DB.crt to db in User Mode assuming the private part of the Key Exchange
Key (KEK) is in KEK.key do
efi-updatevar -a -c DB.crt -k KEK.key db
To replace the old platform key (PK) with a new one in newPK.crt in User Mode assuming the
private part of the old platform key is in PK.key, do
efi-updatevar -c newPK.crt -k PK.key db
To delete the private key, tipping the platform from User Mode to Setup Mode, do
efi-updatevar -d 0 -k PK.key PK
And to put the private key back again (in Setup Mode) do
efi-updatevar -c PK.crt -k PK.key PK
Use efi-updatevar online using onworks.net services
