linux-kernel - Re: [PATCH v3 3/3] selftests/tdx: Test GetQuote TDX attestation feature

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 22 Jun 2023 23:44:54 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     "Williams, Dan J" <dan.j.williams@...el.com>,
        "Aktas, Erdem" <erdemaktas@...gle.com>
CC:     "corbet@....net" <corbet@....net>, "Du, Fan" <fan.du@...el.com>,
        "shuah@...nel.org" <shuah@...nel.org>,
        "Luck, Tony" <tony.luck@...el.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "brijesh.singh@....com" <brijesh.singh@....com>,
        "dionnaglaze@...gle.com" <dionnaglaze@...gle.com>,
        "qinkun@...che.org" <qinkun@...che.org>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "wander@...hat.com" <wander@...hat.com>,
        "atishp@...osinc.com" <atishp@...osinc.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "chongc@...gle.com" <chongc@...gle.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "dhowells@...hat.com" <dhowells@...hat.com>,
        "Yu, Guorui" <guorui.yu@...ux.alibaba.com>,
        "x86@...nel.org" <x86@...nel.org>
Subject: Re: [PATCH v3 3/3] selftests/tdx: Test GetQuote TDX attestation
 feature

On Thu, 2023-06-22 at 16:31 -0700, Erdem Aktas wrote:
> So while I like the suggested direction, I am not sure how much it is
> possible to come up with a common ABI even with just only for 2
> vendors (AMD and Intel) without doing spec changes which is a multi
> year effort imho.

I don't want to intervene the discussion around whether this direction is
correct or not, however I want to say request_key() may not be the right place
to fit Quote (or remote verifiable data blob in general for attestation).

> request_key(coco_quote, "description", "<uuencoded tdreport>")

Although both key and Quote are data blob in some way, Quote certainly is not a
key but have much more information.  The man page of request_key() seems to
suggest it's just for key:

       request_key - request a key from the kernel's key management
       facility

So IMHO using request_key() to fit Quote may cause bigger confusion.