From: Herbert Xu <herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
To: Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-bluetooth-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Johan Hedberg
<johan.hedberg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Gustavo Padovan <gustavo-THi1TnShQwVAfugRpC6u6w@public.gmane.org>,
Marcel Holtmann <marcel-kz+m5ild9QBg9hUCZPvPmw@public.gmane.org>,
linux-crypto-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: Re: Doing crypto in small stack buffers (bluetooth vs vmalloc-stack crash, etc)
Date: Wed, 22 Jun 2016 08:42:14 +0800 [thread overview]
Message-ID: <20160622004214.GA27134@gondor.apana.org.au> (raw)
In-Reply-To: <CALCETrVJzzKkRsSbgsUmVd_+ArKEgoRSVdG1tVp7CXzFoPyVgA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Tue, Jun 21, 2016 at 10:43:40AM -0700, Andy Lutomirski wrote:
>
> Is there a straightforward way that bluetooth and, potentially, other
> drivers can just do synchronous crypto in a small buffer specified by
> its virtual address? The actual cryptography part of the crypto code
> already works this way, but I can't find an API for it.
Yes, single block users should use crypto_cipher_encrypt_one, an
example would be drivers/md/dm-crypt.c.
Cheers,
--
Email: Herbert Xu <herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
WARNING: multiple messages have this Message-ID (diff)
From: Herbert Xu <herbert@gondor.apana.org.au>
To: Andy Lutomirski <luto@kernel.org>
Cc: linux-bluetooth@vger.kernel.org,
Johan Hedberg <johan.hedberg@gmail.com>,
Gustavo Padovan <gustavo@padovan.org>,
Marcel Holtmann <marcel@holtmann.org>,
linux-crypto@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Doing crypto in small stack buffers (bluetooth vs vmalloc-stack crash, etc)
Date: Wed, 22 Jun 2016 08:42:14 +0800 [thread overview]
Message-ID: <20160622004214.GA27134@gondor.apana.org.au> (raw)
In-Reply-To: <CALCETrVJzzKkRsSbgsUmVd_+ArKEgoRSVdG1tVp7CXzFoPyVgA@mail.gmail.com>
On Tue, Jun 21, 2016 at 10:43:40AM -0700, Andy Lutomirski wrote:
>
> Is there a straightforward way that bluetooth and, potentially, other
> drivers can just do synchronous crypto in a small buffer specified by
> its virtual address? The actual cryptography part of the crypto code
> already works this way, but I can't find an API for it.
Yes, single block users should use crypto_cipher_encrypt_one, an
example would be drivers/md/dm-crypt.c.
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2016-06-22 0:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-21 17:43 Doing crypto in small stack buffers (bluetooth vs vmalloc-stack crash, etc) Andy Lutomirski
[not found] ` <CALCETrVJzzKkRsSbgsUmVd_+ArKEgoRSVdG1tVp7CXzFoPyVgA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-06-22 0:42 ` Herbert Xu [this message]
2016-06-22 0:42 ` Herbert Xu
2016-06-22 0:52 ` Andy Lutomirski
2016-06-22 21:48 ` Andy Lutomirski
2016-06-22 23:45 ` Andy Lutomirski
2016-06-23 3:48 ` Herbert Xu
2016-06-23 6:41 ` Herbert Xu
2016-06-23 22:11 ` Andy Lutomirski
[not found] ` <CALCETrUWyNz91WO6O3dNb+YELeZy5q4+oTo6dLRR67P2WvBB8g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-06-23 3:37 ` Herbert Xu
2016-06-23 3:37 ` Herbert Xu
2016-06-28 12:37 George Spelvin
2016-06-28 12:37 ` George Spelvin
2016-06-28 12:42 ` Herbert Xu
2016-06-28 13:23 ` George Spelvin
2016-06-28 13:30 ` Herbert Xu
2016-06-28 14:32 ` George Spelvin
2016-06-29 2:20 ` Herbert Xu
[not found] ` <20160629022049.GA23390-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2016-06-29 12:10 ` George Spelvin
2016-06-29 12:10 ` George Spelvin
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