Date: Wed, 14 Feb 2007 16:21:38 -0600
From: Michael Halcrow <mhalcrow@us.ibm.com>
To: David Howells <dhowells@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>, akpm@linux-foundation.org,
       herbert.xu@redhat.com, linux-kernel@vger.kernel.org, davej@redhat.com,
       arjan@infradead.org, linux-crypto@vger.kernel.org
Subject: Re: [PATCH 0/6] MODSIGN: Kernel module signing
Message-ID: <20070214222138.GB4884@us.ibm.com>
Reply-To: Michael Halcrow <mhalcrow@us.ibm.com>
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On Wed, Feb 14, 2007 at 09:59:37PM +0000, David Howells wrote:
> Michael Halcrow <mhalcrow@us.ibm.com> wrote:
> 
> > Right now, eCryptfs just delegates its modular exponentiation
> > operations to a userspace daemon. If RSA ever finds its way into the
> > kernel, I might tweak eCryptfs to use that instead for some of the
> > public key operations.
> 
> Am I right in thinking that RSA uses many of the same MPI lib bits
> as DSA?

I would imagine so. Assuming we aren't having to hassle with key
generation (eCryptfs takes care of that in userspace), then RSA is,
more or less, a^b mod c (mpi_mulpowm() and friends).

Mike
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