linux-kernel - Re: [PATCH 01/11] evm: Execute evm_inode_init_security() only when the HMAC key is loaded

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Message-ID: <d4c9d5333256b17acdbe41729dd680f534266130.camel@linux.ibm.com>
Date:   Mon, 24 Aug 2020 13:45:00 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Roberto Sassu <roberto.sassu@...wei.com>, mjg59@...gle.com
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 01/11] evm: Execute evm_inode_init_security() only when
 the HMAC key is loaded

Hi Roberto,

On Fri, 2020-08-21 at 14:30 -0400, Mimi Zohar wrote:
> Sorry for the delay in reviewing these patches.   Missing from this
> patch set is a cover letter with an explanation for grouping these
> patches into a patch set, other than for convenience.  In this case, it
> would be along the lines that the original use case for EVM portable
> and immutable keys support was for a few critical files, not combined
> with an EVM encrypted key type.   This patch set more fully integrates
> the initial EVM portable and immutable signature support.

Thank you for more fully integrating the EVM portable signatures into
IMA.

" [PATCH 08/11] ima: Allow imasig requirement to be satisfied by EVM
portable signatures" equates an IMA signature to having a portable and
immutable EVM signature.  That is true in terms of signature
verification, but from an attestation perspective the "ima-sig"
template will not contain a signature.  If not the EVM signature, then
at least some other indication should be included in the measurement
list.

Are you planning on posting the associated IMA/EVM regression tests?

Mimi