From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54650C43460 for ; Thu, 1 Apr 2021 10:29:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 19300610F8 for ; Thu, 1 Apr 2021 10:29:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234202AbhDAK2i (ORCPT ); Thu, 1 Apr 2021 06:28:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234378AbhDAK2O (ORCPT ); Thu, 1 Apr 2021 06:28:14 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C182C06178A for ; Thu, 1 Apr 2021 03:28:13 -0700 (PDT) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=[IPv6:::1]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1lRuYc-0003tP-E8; Thu, 01 Apr 2021 12:28:10 +0200 Subject: Re: [PATCH v1 0/3] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys To: Richard Weinberger Cc: Jarkko Sakkinen , horia geanta , Mimi Zohar , aymen sghaier , Herbert Xu , davem , James Bottomley , kernel , David Howells , James Morris , "Serge E. Hallyn" , Steffen Trumtrar , Udit Agarwal , Jan Luebbe , david , Franck Lenormand , Sumit Garg , linux-integrity , "open list, ASYMMETRIC KEYS" , Linux Crypto Mailing List , linux-kernel , LSM References: <897df7dd-83a1-3e3e-1d9f-5a1adfd5b2fb@pengutronix.de> <1263763932.139584.1617272457698.JavaMail.zimbra@nod.at> From: Ahmad Fatoum Message-ID: <27d7d3fa-5df8-1880-df21-200de31cc629@pengutronix.de> Date: Thu, 1 Apr 2021 12:28:08 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <1263763932.139584.1617272457698.JavaMail.zimbra@nod.at> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: a.fatoum@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-security-module@vger.kernel.org Precedence: bulk List-ID: Hello, On 01.04.21 12:20, Richard Weinberger wrote: > Ahmad, > > ----- Ursprüngliche Mail ----- >> Von: "Ahmad Fatoum" >>> I'm pretty sure with minimal changes it will work with your recent approach too. >> >> I am using dmsetup directly in my project. I am not familiar with cryptsetup >> plain. What benefits do you see with this over direct dmsetup? > > cryptsetup is the de-facto standard to setup encrypted block devices. > There is a lot of existing tooling around cryptsetup already (systemd, etc..), Do you mean systemd-cryptsetup? It looks to me like it's just a way to supply the keyphrase. With trusted keys and a keyphrase unknown to userspace, this won't work. > so being able to use CAAM keys for dm-crypt with cryptsetup seems natural to me. > Plain mode allows setting up dm-crypt without LUKS. I don't (yet) see the utility of it without LUKS. Perhaps a command dump on how to do the same I did with dmsetup, but with cryptsetup plain instead could help me to see the benefits? Cheers, Ahmad > > Thanks, > //richard > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |