linux-kernel - Re: [PATCH 5/8] KEYS: Provide software public key query function [ver #2]

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Date:	Fri, 24 Jun 2016 13:06:02 +0100
From:	David Howells <dhowells@...hat.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	dhowells@...hat.com,
	Mat Martineau <mathew.j.martineau@...ux.intel.com>,
	dwmw2@...radead.org, tadeusz.struk@...el.com,
	linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	Christoph Hellwig <hch@....de>,
	"Theodore Ts'o" <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	James Morris <jmorris@...ei.org>
Subject: Re: [PATCH 5/8] KEYS: Provide software public key query function [ver #2]

Herbert Xu <herbert@...dor.apana.org.au> wrote:

> IOW exporting the raw RSA might make sense because the key may
> not be visible to user-space, or that the RSA might be implemented
> in hardware offload, but there is no sane reason to export pkcs1pad.

The problem is that if I'm to produce consistency with, say, the TPM
interface, then I have to deal in wrapped/padded data - leastways as far as I
can tell from reading the docs.

David