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=-12.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=ham 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 EFF59C4707C for ; Fri, 21 May 2021 17:53:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8C83613DB for ; Fri, 21 May 2021 17:53:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234021AbhEURzO (ORCPT ); Fri, 21 May 2021 13:55:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231520AbhEURzO (ORCPT ); Fri, 21 May 2021 13:55:14 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4CFCC061574; Fri, 21 May 2021 10:53:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Mime-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=yZoMVVrCgWMQPG+5/4X1TgD+dl9bptktASa7ifmXvlA=; b=sa9UNRf2U/1NgXwKuam+BrzD/Q CqNlobUXMdeTASsolGhI3AhnEt7QiLLanEA9A9vw2TTRul9JVatDwfJdFFQezbTRnMxN+uZOEIKB+ 3fvLQIMLPOEdIp17M3x/IYlIMWXhDDet2dw7FEBB4xq6YJk/7n2UM5sZCL3qQazXjDohRuHwXk/b3 vv3gz75/FH0SJFfjyUKcsx3Qei7GZfO5LhJPGaDWlWtYb4BDDFS/y1YKJqyZiBSDQNgaVitFo+ikm kC2MFe4LKvTUSYfIuSr0j+4xTvdL76Oy7ZVvd6SrVWDB+h465G8NPHP2Lulhttkm0/mU5sMtZCQ9Q 6g9rFzGg==; Received: from [2001:8b0:10b:1::3ae] (helo=u3832b3a9db3152.ant.amazon.com) by bombadil.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lk9LJ-00HKn5-3X; Fri, 21 May 2021 17:53:49 +0000 Message-ID: <2f786037cf125393758c6b7be36d55c5ff01f2c6.camel@infradead.org> Subject: Re: [PATCH 0/4] Trusted Key policy for TPM 2.0 From: David Woodhouse To: James Bottomley , linux-integrity@vger.kernel.org Cc: Mimi Zohar , Jarkko Sakkinen , keyrings@vger.kernel.org, David Howells Date: Fri, 21 May 2021 18:53:46 +0100 In-Reply-To: <9244313e34910f17664a6a0320e5b96b4e80d56d.camel@HansenPartnership.com> References: <20210521004401.4167-1-James.Bottomley@HansenPartnership.com> <49bf69d011373f339a21bb61183b135babb6edc8.camel@infradead.org> <57728f2272f26b8ca9e58a8fdac112ec0440e9f6.camel@HansenPartnership.com> <646c272b64912d9d5c9c3c7fdc304ad01772365c.camel@infradead.org> <25e874bfd1d33ebd2dc774b9ab2d47285a2f4d07.camel@HansenPartnership.com> <9244313e34910f17664a6a0320e5b96b4e80d56d.camel@HansenPartnership.com> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-F4x4qBAjiIcYla+ML/so" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org --=-F4x4qBAjiIcYla+ML/so Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2021-05-21 at 09:17 -0700, James Bottomley wrote: > I'm not so sure we want to encourage that. The persistent handle space > is really limited in TPM 2.0. We just ran into a real world situation > where the TPM ran out after a handful. It was an application that > loaded files into persistent handles ("because it's easier") and then > made use of them ... we're currently fixing it not to use persistent > handles because it doesn't need to. Makes sense. We should fix StrongSwan then, because they're doing the same thing. https://wiki.strongswan.org/projects/strongswan/wiki/TpmPlugin Of course, if we document the file format and make it ubiquitously supported (including making an OpenSSL *provider* to replace the obsolete ENGINEs, and chasing it into GnuTLS in=20 https://gitlab.com/gnutls/gnutls/-/issues/594 ), that will go a long way towards encouraging applications to use keys wrapped in files instead of NVRAM... --=-F4x4qBAjiIcYla+ML/so Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCECow ggUcMIIEBKADAgECAhEA4rtJSHkq7AnpxKUY8ZlYZjANBgkqhkiG9w0BAQsFADCBlzELMAkGA1UE BhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgG A1UEChMRQ09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhl 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