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=-7.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,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 0A43DC433DB for ; Wed, 23 Dec 2020 15:59:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEE28224D3 for ; Wed, 23 Dec 2020 15:59:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727293AbgLWP7o (ORCPT ); Wed, 23 Dec 2020 10:59:44 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:13168 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726390AbgLWP7o (ORCPT ); Wed, 23 Dec 2020 10:59:44 -0500 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0BNFYIXJ164382; Wed, 23 Dec 2020 10:59:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=l5X8xjAD1dP6zpYhqiITFqXrFCYkdR6RvNjSajXqmto=; b=RcNKM70XW4uaMsN9+WSEEIVN1L+fTGd1wJGDbnZgSng+9UAkDQGzyDHtjGKH/fQSNqRG jR7X/f4P1fcqe81bhMDxuLXlLFu/LXbDypQN+wQuKCC3vpDuTSu4tmEXJ/syjzR8oqQ/ v8Plu/U/4sVtq2bgqGaz3YNPlfG1/rb1VVUQSZq9dTUqKEt3x/Gh+IJZTxZIM5HEzJTY YI/pg7EDWfDIyvRdG4KPJIsiE6c/6sBmwR1hx0HxbTA0JPzGNRIhdvWAZRkOVdo3UobM FghOWJabooY10dBZtljdQkikb/Gw3MgOPxZnXBIh4Ag7DOCRZpT2KBp4ik/IhB/S0Ey1 hg== Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0a-001b2d01.pphosted.com with ESMTP id 35m7xx9p0y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Dec 2020 10:58:59 -0500 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0BNFvjfS003618; Wed, 23 Dec 2020 15:58:59 GMT Received: from b01cxnp22034.gho.pok.ibm.com (b01cxnp22034.gho.pok.ibm.com [9.57.198.24]) by ppma04dal.us.ibm.com with ESMTP id 35m62n195c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Dec 2020 15:58:59 +0000 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0BNFwwZr35324350 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 23 Dec 2020 15:58:58 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 585D3124052; Wed, 23 Dec 2020 15:58:58 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 159B112405A; Wed, 23 Dec 2020 15:58:58 +0000 (GMT) Received: from [9.80.231.19] (unknown [9.80.231.19]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 23 Dec 2020 15:58:57 +0000 (GMT) Subject: Re: [PATCH RESEND v4 1/1] tpm: add sysfs exports for all banks of PCR registers To: "Elliott, Robert (Servers)" , James Bottomley , "linux-integrity@vger.kernel.org" Cc: Mimi Zohar , Jarkko Sakkinen , "linux-api@vger.kernel.org" References: <20201129223022.5153-1-James.Bottomley@HansenPartnership.com> <20201129223022.5153-2-James.Bottomley@HansenPartnership.com> From: Ken Goldman Message-ID: Date: Wed, 23 Dec 2020 10:58:58 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2020-12-23_07:2020-12-23,2020-12-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 mlxscore=0 lowpriorityscore=0 clxscore=1011 priorityscore=1501 bulkscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012230115 Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On 11/30/2020 5:50 PM, Elliott, Robert (Servers) wrote: > Yes, they are in > * TCG PC Client Platform TPM Profile Specification for TPM 2.0 > Version 1.05, Revision 14, 4 September 2020 > * Trusted Platform Module Library Part 2: Structures > Family 2.0, Level 00 Revision 1.59, 8 November 2019 > > I don't know if anyone has started implementing SHA-3 for PCRs. AFIAK, no for SHA-3 Generally, TPM vendors do not implement optional features. Since applications cannot use them if they want interoperability, it increases the TPM cost with no perceived benefit. SHA-384, ECC NIST-P384, and RSA-3072 recently became mandatory.