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Date: Fri, 16 Feb 2024 16:44:22 +0000
From: Matthew Wilcox <willy@infradead.org>
To: Petr Tesarik <petrtesarik@huaweicloud.com>
Cc: Dave Hansen <dave.hansen@intel.com>,
	Petr =?utf-8?B?VGVzYcWZw61r?= <petr@tesarici.cz>,
	Jonathan Corbet <corbet@lwn.net>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>,
	Oleg Nesterov <oleg@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>, Xin Li <xin3.li@intel.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Kees Cook <keescook@chromium.org>,
	"Masami Hiramatsu (Google)" <mhiramat@kernel.org>,
	Pengfei Xu <pengfei.xu@intel.com>,
	Josh Poimboeuf <jpoimboe@kernel.org>, Ze Gao <zegao2021@gmail.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Kai Huang <kai.huang@intel.com>,
	David Woodhouse <dwmw@amazon.co.uk>,
	Brian Gerst <brgerst@gmail.com>, Jason Gunthorpe <jgg@ziepe.ca>,
	Joerg Roedel <jroedel@suse.de>,
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	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	Roberto Sassu <roberto.sassu@huaweicloud.com>,
	David Howells <dhowells@redhat.com>,
	Petr Tesarik <petr.tesarik1@huawei-partners.com>
Subject: Re: [RFC 6/8] KEYS: PGP data parser
Message-ID: <Zc-Q5pVHjngq9lpX@casper.infradead.org>
References: <fb4a40c7-af9a-406a-95ab-406595f3ffe5@intel.com>
 <20240216152435.1575-1-petrtesarik@huaweicloud.com>
 <20240216152435.1575-7-petrtesarik@huaweicloud.com>
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In-Reply-To: <20240216152435.1575-7-petrtesarik@huaweicloud.com>

On Fri, Feb 16, 2024 at 04:24:33PM +0100, Petr Tesarik wrote:
> From: David Howells <dhowells@redhat.com>
> 
> Implement a PGP data parser for the crypto key type to use when
> instantiating a key.
> 
> This parser attempts to parse the instantiation data as a PGP packet
> sequence (RFC 4880) and if it parses okay, attempts to extract a public-key
> algorithm key or subkey from it.

I don't understand why we want to do this in-kernel instead of in
userspace and then pass in the actual key.