From: Eric Biggers <ebiggers@kernel.org>
To: Mimi Zohar <zohar@linux.ibm.com>
Cc: linux-integrity@vger.kernel.org, Stefan Berger <stefanb@linux.ibm.com>
Subject: Re: [PATCH 1/3] ima: Define asymmetric_verify_v3() to verify IMA sigv3 signatures
Date: Mon, 30 Mar 2026 13:13:36 -0700 [thread overview]
Message-ID: <20260330201336.GE4303@sol> (raw)
In-Reply-To: <20260324203929.2475782-2-zohar@linux.ibm.com>
On Tue, Mar 24, 2026 at 04:39:27PM -0400, Mimi Zohar wrote:
> + * IMA signature version 3 disambiguates the data that is signed by
> + * indirectly signing the hash of the ima_file_id structure data.
The right way to think about it is that it's the ima_file_id itself that
is being signed and verified, and taking the hash of it is only a
workaround for legacy algorithms that can only sign and verify hashes.
With modern algorithms like Ed25519 and ML-DSA that accept
arbitrary-length messages, that workaround won't be needed.
- Eric
next prev parent reply other threads:[~2026-03-30 20:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-24 20:39 [PATCH 0/3] ima: add regular file data hash support for sigv3 Mimi Zohar
2026-03-24 20:39 ` [PATCH 1/3] ima: Define asymmetric_verify_v3() to verify IMA sigv3 signatures Mimi Zohar
2026-03-30 20:13 ` Eric Biggers [this message]
2026-04-05 9:46 ` Mimi Zohar
2026-03-24 20:39 ` [PATCH 2/3] ima: add regular file data hash signature version 3 support Mimi Zohar
2026-03-24 20:39 ` [PATCH 3/3] ima: add support to require IMA sigv3 signatures Mimi Zohar
2026-03-25 0:15 ` [PATCH 0/3] ima: add regular file data hash support for sigv3 Stefan Berger
2026-03-30 20:16 ` Eric Biggers
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