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Thu, 19 Aug 2021 15:23:32 +0000 Content-Type: text/plain; charset=utf-8 Subject: Re: [PATCH v4 00/12] Enroll kernel keys thru MOK From: Eric Snowberg In-Reply-To: Date: Thu, 19 Aug 2021 09:23:20 -0600 Cc: keyrings@vger.kernel.org, linux-integrity , David Woodhouse , Herbert Xu , "David S . Miller" , James Morris , "Serge E . Hallyn" , keescook@chromium.org, gregkh@linuxfoundation.org, torvalds@linux-foundation.org, scott.branden@broadcom.com, weiyongjun1@huawei.com, nayna@linux.ibm.com, ebiggers@google.com, ardb@kernel.org, Lakshmi Ramasubramanian , lszubowi@redhat.com, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-security-module@vger.kernel.org, James Bottomley , pjones@redhat.com, "konrad.wilk@oracle.com" , Patrick Uiterwijk Content-Transfer-Encoding: quoted-printable Message-Id: <91B1FE51-C6FC-4ADF-B05A-B1E59E20132E@oracle.com> References: <20210819002109.534600-1-eric.snowberg@oracle.com> To: Mimi Zohar , Jarkko Sakkinen , David Howells X-Mailer: Apple Mail (2.3273) X-ClientProxiedBy: BYAPR05CA0059.namprd05.prod.outlook.com (2603:10b6:a03:74::36) To CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2606:b400:2001:92:8000::1af] (2606:b400:8024:1010::17c6) by BYAPR05CA0059.namprd05.prod.outlook.com (2603:10b6:a03:74::36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4457.5 via Frontend Transport; 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Each end-user may use this kernel in entirely different >>> ways. Some downstream kernels have chosen to always trust platform key= s >>> within the Linux trust boundary for kernel module signing. These >>> kernels have no way of using digital signature base IMA appraisal. >>>=20 >>> This series introduces a new Linux kernel keyring containing the Machin= e >>> Owner Keys (MOK) called .mok. It also adds a new MOK variable to shim. >>=20 >> I would name it as ".machine" because it is more "re-usable" name, e.g. >> could be used for similar things as MOK. ".mok" is a bad name because >> it binds directly to a single piece of user space software. >=20 > Nayna previously said, > "I believe the underlying source from where CA keys are loaded might va= ry=20 > based on the architecture (".mok" is UEFI specific.). The key part is=20 > that this new keyring should contain only CA keys which can be later=20 > used to vouch for user keys loaded onto IMA or secondary keyring at=20 > runtime. It would be good to have a "ca" in the name, like .xxxx-ca,=20 > where xxxx can be machine, owner, or system. I prefer .system-ca." >=20 > The CA keys on the MOK db is simply the first root of trust being > defined, but other roots of trust are sure to follow. For this reason, > I agree naming the new keyring "mok" should be avoided. As I said previously, I=E2=80=99m open to renaming, I just would like to ha= ve an=20 agreement on the new name before changing everything. The current proposed= =20 names I have heard are =E2=80=9C.machine" and ".system-ca". Is there a pre= ference=20 the maintainers feel is appropriate? If so, please let me know and I=E2=80= =99ll=20 rename it. Thanks.