linux-kernel - Re: [PATCH v5] KEYS: encrypted: Instantiate key with user-provided decrypted data

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Message-ID: <YhPzwOREseaU3RA5@iki.fi>
Date:   Mon, 21 Feb 2022 21:19:12 +0100
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     Yael Tzur <yaelt@...gle.com>, linux-integrity@...r.kernel.org,
        jejb@...ux.ibm.com, corbet@....net, dhowells@...hat.com,
        jmorris@...ei.org, serge@...lyn.com, keyrings@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v5] KEYS: encrypted: Instantiate key with user-provided
 decrypted data

On Mon, Feb 21, 2022 at 12:11:22AM -0500, Mimi Zohar wrote:
> On Tue, 2022-02-15 at 09:19 -0500, Yael Tzur wrote:
> > For availability and performance reasons master keys often need to be
> > released outside of a Key Management Service (KMS) to clients. It
> > would be beneficial to provide a mechanism where the
> > wrapping/unwrapping of data encryption keys (DEKs) is not dependent
> > on a remote call at runtime yet security is not (or only minimally)
> > compromised. Master keys could be securely stored in the Kernel and
> > be used to wrap/unwrap keys from Userspace.
> > 
> > The encrypted.c class supports instantiation of encrypted keys with
> > either an already-encrypted key material, or by generating new key
> > material based on random numbers. This patch defines a new datablob
> > format: [<format>] <master-key name> <decrypted data length>
> > <decrypted data> that allows to inject and encrypt user-provided
> > decrypted data. The decrypted data must be hex-ascii encoded.
> > 
> > Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
> > Signed-off-by: Yael Tzur <yaelt@...gle.com>
> 
> Thanks,  Yael.
> 
> This patch is now queued in the #next-integrity-testing branch.
> 
> -- 
> thanks,
> 
> Mimi
> 

Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>

BR, Jarkko