Messages in this thread | | | Subject | Re: [PATCH v3 02/11] evm: Load EVM key in ima_load_x509() to avoid appraisal | From | Mimi Zohar <> | Date | Wed, 02 Dec 2020 12:27:34 -0500 |
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On Wed, 2020-11-11 at 10:22 +0100, Roberto Sassu wrote: > Public keys do not need to be appraised by IMA as the restriction on the > IMA/EVM keyrings ensures that a key can be loaded only if it is signed with > a key in the primary or secondary keyring.
Let's clean this up a bit. - The public builtin keys ... - IMA/EVM trusted keyrings ... - on the builtin or secondary keyrings
> However, when evm_load_x509() is called, appraisal is already enabled and > a valid IMA signature must be added to the EVM key to pass verification. > > Since the restriction is applied on both IMA and EVM keyrings, it is safe
and update: - IMA and EVM trusted keyrings
> to disable appraisal also when the EVM key is loaded. This patch calls > evm_load_x509() inside ima_load_x509() if CONFIG_IMA_LOAD_X509 is defined.
, which crosses the normal IMA and EVM boundary,
thanks,
Mimi
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