Darling: Darling shell not working with Ubuntu 18.04

[jmexe]

Tried to run darling shell and got the error message:

modprobe: ERROR: could not insert 'darling_mach': Operation not permitted
Failed to load the kernel module

OS: Ubuntu 18.04.3 LTS x86_64
Kernel: 5.0.0-37-generic

Any idea how could I fix it? Thanks!

[bjorn3]

Did you run

make lkm
sudo make lkm_install

when installing? Also is secure boot disabled? Ubuntu doesn't allow loading unsigned kernel modules when secure boot is enabled.

[jmexe]

Thanks @bjorn3 ! Disabling secure boot makes it work.

[TheBrokenRail]

You can run it with secure boot if you sign the kernel module manually:

# Generate Key
openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -days 36500 -subj "/CN=Darling LKM/"
# Enroll Key
sudo mokutil --import MOK.der
# Sign Module
sudo kmodsign sha512 MOK.priv MOK.der /lib/modules/$(uname -r)/extra/darling-mach.ko
# Reboot System and Enroll Key

[ahyattdev]

Thanks @TheBrokenRail, added that to the wiki https://wiki.darlinghq.org/build_instructions#secure_boot

[TheBrokenRail]

It also seems to be signed automatically when using the DEB package.