T861: sign all Kernel modules with an ephemeral key #772
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As the VyOS Linux Kernel will be compiled with CONFIG_MODULE_SIG_FORCE all driver modules need to be cryptographically signed. This happens during build of the Kernel and it's 3rd party modules. Stripping the objects would remove said signature and the system will be unable to boot b/c of CONFIG_MODULE_SIG_FORCE.
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dmbaturin
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Sep 24, 2024
sarthurdev
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Sep 24, 2024
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Could you update scripts in the scrips/package-build dir? |
Will do |
The shim review board (which is the secure boot base loader) recommends using ephemeral keys when signing the Linux Kernel. This commit enables the Kernel build system to generate a one-time ephemeral key that is used to: * sign all build-in Kernel modules * sign all other out-of-tree Kernel modules The key lives in /tmp and is destroyed after the build container exits and is named: "VyOS build time autogenerated kernel key". In addition the Kernel now uses CONFIG_MODULE_SIG_FORCE. This now makes it unable to load any Kernel Module to the image that is NOT signed by the ephemeral key.
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Change Summary
The shim review board (which is the secure boot base loader) recommends using ephemeral keys when signing the Linux Kernel. This commit enables the Kernel build system to generate a one-time ephemeral key that is used to:
The key lives in
/tmpand is destroyed after the build container exits and is named:VyOS build time autogenerated kernel key.In addition the Kernel now uses
CONFIG_MODULE_SIG_FORCE. This makes it unable to load any Kernel Module to the image that is NOT signed by the ephemeral key.During system boot one will now see:
Types of changes
Related Task(s)
Related PR(s)
Component(s) name
Kernel / Boot
How to test
Checklist: