From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 11 Mar 2025 09:15:56 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from <barebox-bounces+lore=pengutronix.de@lists.infradead.org>) id 1trumL-00CbBP-1a for lore@lore.pengutronix.de; Tue, 11 Mar 2025 09:15:56 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <barebox-bounces+lore=pengutronix.de@lists.infradead.org>) id 1trumK-000809-BD for lore@pengutronix.de; Tue, 11 Mar 2025 09:15:56 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NUIWbDbBaFnS7vSrPQoXRy+KMm2NpOKRt+7P0iAgIsE=; b=MQG8BOiVaGIW0PMl+udPQmCHh/ +8zCD5bUkxXREtJczeTJcWsmAVapto46Tuo59zlyi7V/g3Zu4AqWNfe1qCznF9fzNiwgiEOrEw4R0 znDccdB3v0Wn6rBTukjbI5En1d78otoLmKpgc34aJ4mka6LNF1xpwvWE4SbeKZdcIILIYpxEaOo6G SxggvSEkzofPuBpvJM/Si7JWeU0sddEg6lPImCdHF0+qliv5l0GVWwMjN4TWriWdETL6c9xnlK25/ S8QC7IxPjrteYVqH+r+nn+zju6JAQJZnrxCl5SVi8Aof3ZDLTCx/xUmj734f9ptnkfC0xnrkRz7GF H6pcxAlg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1trulq-00000004ybS-29sC; Tue, 11 Mar 2025 08:15:26 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1trujM-00000004y5S-3P8X for barebox@lists.infradead.org; Tue, 11 Mar 2025 08:12:54 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <sha@pengutronix.de>) id 1trujL-0007Wg-En; Tue, 11 Mar 2025 09:12:51 +0100 Received: from pty.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::c5]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from <sha@pengutronix.de>) id 1trujL-0059C6-0r; Tue, 11 Mar 2025 09:12:51 +0100 Received: from sha by pty.whiteo.stw.pengutronix.de with local (Exim 4.96) (envelope-from <sha@pengutronix.de>) id 1trujL-007fzI-0U; Tue, 11 Mar 2025 09:12:51 +0100 Date: Tue, 11 Mar 2025 09:12:51 +0100 From: Sascha Hauer <s.hauer@pengutronix.de> To: Marco Felsch <m.felsch@pengutronix.de> Cc: "open list:BAREBOX" <barebox@lists.infradead.org> Message-ID: <Z8_wg9fWKN4s0vrd@pengutronix.de> References: <20250228-am625-secure-v1-0-4002488ff5ed@pengutronix.de> <20250310174058.t3rsxws6syxz2rqp@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250310174058.t3rsxws6syxz2rqp@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250311_011252_849083_02D9E872 X-CRM114-Status: GOOD ( 19.92 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: <barebox.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/barebox>, <mailto:barebox-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/barebox/> List-Post: <mailto:barebox@lists.infradead.org> List-Help: <mailto:barebox-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/barebox>, <mailto:barebox-request@lists.infradead.org?subject=subscribe> Sender: "barebox" <barebox-bounces@lists.infradead.org> X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.3 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH 00/13] am625: support secure loading of full barebox X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On Mon, Mar 10, 2025 at 06:40:58PM +0100, Marco Felsch wrote: > Hi Sascha, > > On 25-02-28, Sascha Hauer wrote: > > On K3 SoCs only a small barebox is loaded by the ROM into SRAM. This > > barebox then loads the full barebox from SD/eMMC or USB DFU. In a secure > > boot environment the full barebox must be authenticated. This series > > implements two ways for accomplishing this. > > > > First way is to utilize the ROM API to authenticate images. The other > > way is to compile a secure hash into the first stage binary and check > > if the full barebox image matches the hash. Using the ROM API means > > different first stage and second stage images can be combined whereas > > hashing binds specific builds together avoiding mix and match attacks. > > before having a closer look on your patchset, do we really want to have > the 2nd case to be available? Yes, as explained to avoid mix-and-match attacks. > If we really want the 2nd case to be > available we should bound it to CONFIG_INSECURE (if not already done). Ok, will do. Sascha -- 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 |