documentation/docs/void-desktop-setup/post-installation/secure-boot.md
2023-08-27 12:29:25 +02:00

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# Secure boot
Secure boot is sometimes a necessity when working with a windows dual boot on laptops and also an extra layer of protection for your system.
For linux to work with secureboot it's necessary to enroll keys using sbctl.
```
# xbps-install -Sy sbctl sbsigntool
```
Then to create keys, enroll them and sign the executables with it.
```
# sbctl create-keys
# sbctl enroll-keys
# sbctl sign -s /boot/EFI/Boot/BOOTX64.EFI
# sbctl sign -s /boot/EFI/gummiboot/gummibootx64.efi
# sbctl sign -s /boot/vmlinuz-<version>
```
If you get an error with enrolling the keys it might be necessary to add the `--microsoft` flag.
Then to check if it worked.
```
# sbctl verify
```
The kernels can automatically be signed after an update thanks to the `sbsigntool` package. Configure it `/etc/default/sbsigntool-kernel-hook` and change the options:
```
SBSIGN_EFI_KERNEL=1
EFI_KEY_FILE=/usr/share/secureboot/keys/db/db.key
EFI_CERT_FILE=/usr/share/secureboot/keys/db/db.pem
```
> Don't forget to turn on secureboot in your bios!
To check if your system is actually using secureboot run:
```
$ sbctl status
```