From: David Woodhouse <dwmw2@infradead.org>
To: Stephan Mueller <smueller@chronox.de>
Cc: Marcel Holtmann <marcel@holtmann.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
linux-crypto@vger.kernel.org,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org, David Howells <dhowells@redhat.com>
Subject: Re: [PATCH v2 0/5] crypto: add algif_akcipher user space API
Date: Wed, 28 Oct 2015 08:15:16 +0900 [thread overview]
Message-ID: <1445987716.3405.127.camel@infradead.org> (raw)
In-Reply-To: <9859277.cZClo5B21s@tauon.atsec.com>
[-- Attachment #1: Type: text/plain, Size: 1250 bytes --]
On Tue, 2015-10-27 at 11:50 +0100, Stephan Mueller wrote:
>
> >expose that critically limited API to userspace. We need to expose an
> >API which supports hardware keys, and basically that means using the
> >kernel's key subsystem.
>
> Agreed. But at the same time, that interface should be able to support the use
> case where the software wants to be in control (just take OpenSSL as the
> simple example where you can add an engine for the Linux kernel backed RSA
> operation).
Absolutely. The interface needs to support *both*.
I've spent a lot of time chasing through userspace stacks, fixing
broken assumptions that we will *always* have the actual key material
in a file — and making libraries and applications accept PKCS#11 URIs
referring to keys in hardware as well as filenames.
I am violently opposed to exposing an API from the kernel which makes
that *same* fundamental mistake, and ties its users to using *only*
software keys.
FROM THE BEGINNING, users of this new API should be able to cope with
the fact that they might not *have* the key material, and that they
might simply be referring to a key which exists elsewhere. Such as in
the TPM, or within an SGX software enclave.
--
dwmw2
[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5691 bytes --]
next prev parent reply other threads:[~2015-10-27 23:15 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-18 10:44 [PATCH v2 0/5] crypto: add algif_akcipher user space API Stephan Mueller
2015-10-18 10:45 ` [PATCH v2 1/5] MPI: fix off by one in mpi_read_raw_from_sgl Stephan Mueller
2015-10-19 23:25 ` Tadeusz Struk
2015-10-20 14:20 ` Herbert Xu
2015-10-18 10:46 ` [PATCH v2 2/5] crypto: AF_ALG -- add sign/verify API Stephan Mueller
2015-10-18 10:47 ` [PATCH v2 3/5] crypto: AF_ALG -- add setpubkey setsockopt call Stephan Mueller
2015-10-30 8:16 ` Marcel Holtmann
2015-10-30 8:42 ` Stephan Mueller
2015-10-18 10:48 ` [PATCH v2 4/5] crypto: AF_ALG -- add asymmetric cipher interface Stephan Mueller
2015-10-18 10:49 ` [PATCH v2 5/5] crypto: algif_akcipher - enable compilation Stephan Mueller
2015-10-19 1:32 ` [PATCH v2 0/5] crypto: add algif_akcipher user space API Herbert Xu
2015-10-19 7:14 ` Stephan Mueller
2015-10-19 7:27 ` Herbert Xu
2015-10-27 4:54 ` Marcel Holtmann
2015-10-27 9:12 ` Stephan Mueller
2015-10-27 9:19 ` David Woodhouse
2015-10-27 10:50 ` Stephan Mueller
2015-10-27 23:15 ` David Woodhouse [this message]
2015-10-27 23:35 ` Stephan Mueller
2015-10-27 23:43 ` David Woodhouse
2015-10-27 23:47 ` Stephan Mueller
2015-10-28 0:37 ` David Woodhouse
2015-10-28 1:18 ` Stephan Mueller
2015-10-28 1:36 ` David Woodhouse
2015-10-28 0:46 ` Marcel Holtmann
2015-10-28 1:29 ` Stephan Mueller
2015-10-28 2:56 ` Marcel Holtmann
2015-10-28 10:12 ` Stephan Mueller
2015-10-27 15:16 ` Tadeusz Struk
2015-12-14 18:06 ` Tadeusz Struk
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1445987716.3405.127.camel@infradead.org \
--to=dwmw2@infradead.org \
--cc=dhowells@redhat.com \
--cc=herbert@gondor.apana.org.au \
--cc=linux-api@vger.kernel.org \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marcel@holtmann.org \
--cc=smueller@chronox.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).