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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_1 autolearn=unavailable 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 D9895C433FF for ; Fri, 2 Aug 2019 01:42:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BAA1E206A3 for ; Fri, 2 Aug 2019 01:42:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731569AbfHBBmb (ORCPT ); Thu, 1 Aug 2019 21:42:31 -0400 Received: from out30-130.freemail.mail.aliyun.com ([115.124.30.130]:39435 "EHLO out30-130.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731411AbfHBBmb (ORCPT ); Thu, 1 Aug 2019 21:42:31 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04446;MF=zhang.jia@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0TYR759._1564710146; Received: from ali-6c96cfd98fb5.local(mailfrom:zhang.jia@linux.alibaba.com fp:SMTPD_---0TYR759._1564710146) by smtp.aliyun-inc.com(127.0.0.1); Fri, 02 Aug 2019 09:42:27 +0800 Subject: Re: [PATCH] ima: Allow to import the blacklisted cert signed by secondary CA cert To: Mimi Zohar , dhowells@redhat.com, dmitry.kasatkin@gmail.com Cc: keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, "Mark D. Baushke" , Petko Manolov References: <1564622625-112173-1-git-send-email-zhang.jia@linux.alibaba.com> <1564700229.11223.9.camel@linux.ibm.com> From: Jia Zhang Message-ID: Date: Fri, 2 Aug 2019 09:42:26 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <1564700229.11223.9.camel@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: On 2019/8/2 上午6:57, Mimi Zohar wrote: > Hi Jia, > > On Thu, 2019-08-01 at 09:23 +0800, Jia Zhang wrote: >> Similar to .ima, the cert imported to .ima_blacklist is able to be >> authenticated by a secondary CA cert. >> >> Signed-off-by: Jia Zhang > > The IMA blacklist, which is defined as experimental for a reason, was > upstreamed prior to the system blacklist.  Any reason you're not using > the system blacklist?  Before making this sort of change, I'd like > some input from others. In our trusted cloud service, the IMA private key is controlled by tenant for some reason. Some unprofessional operations made by tenant may lead to the leakage of IMA private key. So the need for importing the blacklisted is necessary，without system/kexec reboot, on the contrary, the system blacklist needs a kernel rebuild and system/kexec reboot, without runtime and fine-grained control. The secondary CA cert has a similar story, but it is not controlled by tenant. It is always imported during system/kexec boot to serve importing IMA trusted cert and IMA blacklisted cert. Jia > > thanks, > > Mimi >