linux-kernel - Re: [PATCH v4 2/2] certs: Add support for using elliptic curve keys for signing modules

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Message-ID: <e5baf1bbc6aa454c2a708d85d73fdc2f3470bf16.camel@linux.ibm.com>
Date:   Mon, 31 May 2021 12:12:35 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Stefan Berger <stefanb@...ux.ibm.com>, jeyu@...nel.org,
        keyrings@...r.kernel.org, dhowells@...hat.com, jarkko@...nel.org
Cc:     nayna@...ux.ibm.com, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] certs: Add support for using elliptic curve keys
 for signing modules

On Fri, 2021-04-23 at 11:12 -0400, Stefan Berger wrote:
> Add support for using elliptic curve keys for signing modules. It uses
> a NIST P384 (secp384r1) key if the user chooses an elliptic curve key
> and will have ECDSA support built into the kernel.
> 
> Note: A developer choosing an ECDSA key for signing modules should still
> delete the signing key (rm certs/signing_key.*) when building an older
> version of a kernel that only supports RSA keys. Unless kbuild automati-
> cally detects and generates a new kernel module key, ECDSA-signed kernel
> modules will fail signature verification.
> 
> Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>

Tested-by: Mimi Zohar <zohar@...ux.ibm.com>