Messages in this thread | | | Subject | Re: [PATCH v9 5/8] KEYS: Introduce link restriction for machine keys | From | Mimi Zohar <> | Date | Sun, 09 Jan 2022 17:42:09 -0500 |
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On Wed, 2022-01-05 at 18:50 -0500, Eric Snowberg wrote: > Introduce a new link restriction that includes the trusted builtin, > secondary and machine keys. The restriction is based on the key to be > added being vouched for by a key in any of these three keyrings. > > With the introduction of the machine keyring, the end-user may choose to > trust Machine Owner Keys (MOK) within the kernel. If they have chosen to > trust them, the .machine keyring will contain these keys. If not, the > machine keyring will always be empty. Update the restriction check to > allow the secondary trusted keyring and ima keyring to also trust > machine keys.
As suggested the Kconfig in "[PATCH v9 2/8] integrity: Introduce a Linux keyring called machine" only loads the platform keys onto the .machine keyring, when IMA_KEYRINGS_PERMIT_SIGNED_BY_BUILTIN_OR_SECONDARY is not enabled. The last sentence needs to be updated to reflect v9.
thanks,
Mimi
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