From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@transmeta.com>,
dean gaudet <dean-list-linux-kernel@arctic.org>,
Linux Kernel List <linux-kernel@vger.kernel.org>,
Jonathan Thackray <jthackray@zeus.com>
Subject: Re: 'native files', 'object fingerprints' [was: sendpath()]
Date: Tue, 16 Jan 2001 14:57:05 +0100 [thread overview]
Message-ID: <20010116145705.C19949@pcep-jamie.cern.ch> (raw)
In-Reply-To: <Pine.LNX.4.10.10101152056170.12667-100000@penguin.transmeta.com> <Pine.LNX.4.30.0101161020200.673-100000@elte.hu>
In-Reply-To: <Pine.LNX.4.30.0101161020200.673-100000@elte.hu>; from mingo@elte.hu on Tue, Jan 16, 2001 at 10:48:34AM +0100
Ingo Molnar wrote:
> struct native_file {
> unsigned long master_fingerprint[8];
> unsigned long file_fingerprint[8];
> struct file file;
> };
>
> 'fingerprints' are 256 bit, true random numbers. master_fingerprint is
> global to the kernel and is generated once per boot. It validates the
> pointer of the structure. The master fingerprint is never known to
> user-space.
>
> file_fingerprint is a 256-bit identifier generated for this native file.
> The file fingerprint and the (kernel) pointer to the native file is
> returned to user-space. The cryptographical safety of these 256-bit random
> numbers guarantees that no breach can occur in a reasonable period of
> time. It's in essence an 'encrypted' communication between kernel and
> user-space.
Sounds similar to the Hurd...
-- Jamie
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next prev parent reply other threads:[~2001-01-16 13:59 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-14 18:29 Is sendfile all that sexy? jamal
2001-01-14 18:50 ` Ingo Molnar
2001-01-14 19:02 ` jamal
2001-01-14 19:09 ` Ingo Molnar
2001-01-14 19:18 ` jamal
2001-01-14 20:22 ` Linus Torvalds
2001-01-14 20:38 ` Ingo Molnar
2001-01-14 21:44 ` Linus Torvalds
2001-01-14 21:49 ` Ingo Molnar
2001-01-14 21:54 ` Gerhard Mack
2001-01-14 22:40 ` Linus Torvalds
2001-01-14 22:45 ` J Sloan
2001-01-15 20:15 ` H. Peter Anvin
2001-01-15 3:43 ` Michael Peddemors
2001-01-15 13:02 ` Florian Weimer
2001-01-15 13:45 ` Tristan Greaves
2001-01-15 1:14 ` Dan Hollis
2001-01-15 15:24 ` Jonathan Thackray
2001-01-15 15:36 ` Matti Aarnio
2001-01-15 20:17 ` H. Peter Anvin
2001-01-15 16:05 ` dean gaudet
2001-01-15 18:34 ` Jonathan Thackray
2001-01-15 18:46 ` Linus Torvalds
2001-01-15 20:47 ` [patch] sendpath() support, 2.4.0-test3/-ac9 Ingo Molnar
2001-01-16 4:51 ` dean gaudet
2001-01-16 4:59 ` Linus Torvalds
2001-01-16 9:48 ` 'native files', 'object fingerprints' [was: sendpath()] Ingo Molnar
2000-01-01 2:02 ` Pavel Machek
2001-01-16 11:13 ` Andi Kleen
2001-01-16 11:26 ` Ingo Molnar
2001-01-16 11:37 ` Andi Kleen
2001-01-16 12:04 ` O_ANY [was: Re: 'native files', 'object fingerprints' [was: sendpath()]] Ingo Molnar
2001-01-16 12:09 ` Ingo Molnar
2001-01-16 12:13 ` Peter Samuelson
2001-01-16 12:33 ` Ingo Molnar
2001-01-16 14:40 ` Felix von Leitner
2001-01-16 12:34 ` Andi Kleen
2001-01-16 13:00 ` Mitchell Blank Jr
2001-01-16 13:57 ` Jamie Lokier [this message]
2001-01-16 14:27 ` 'native files', 'object fingerprints' [was: sendpath()] Felix von Leitner
2001-01-16 17:47 ` Linus Torvalds
2001-01-17 4:39 ` dean gaudet
2001-01-16 9:19 ` [patch] sendpath() support, 2.4.0-test3/-ac9 Ingo Molnar
2001-01-17 0:03 ` dean gaudet
2001-01-15 18:58 ` Is sendfile all that sexy? dean gaudet
2001-01-15 19:41 ` Ingo Molnar
2001-01-15 20:33 ` Albert D. Cahalan
2001-01-15 21:00 ` Linus Torvalds
2001-01-16 10:40 ` Felix von Leitner
2001-01-16 11:56 ` Peter Samuelson
2001-01-16 12:37 ` Ingo Molnar
2001-01-16 12:42 ` Ingo Molnar
2001-01-16 12:47 ` Felix von Leitner
2001-01-16 13:48 ` Jamie Lokier
2001-01-16 14:20 ` Felix von Leitner
2001-01-16 15:05 ` David L. Parsley
2001-01-16 15:05 ` Jakub Jelinek
2001-01-16 15:46 ` David L. Parsley
2001-01-18 14:00 ` Laramie Leavitt
2001-01-17 19:27 ` dean gaudet
2001-01-24 0:58 ` Sasi Peter
2001-01-24 8:44 ` James Sutherland
2001-01-25 10:20 ` Anton Blanchard
2001-01-25 10:58 ` Sasi Peter
2001-01-26 6:10 ` Anton Blanchard
2001-01-26 11:46 ` David S. Miller
2001-01-26 14:12 ` Anton Blanchard
2001-01-15 23:16 ` Pavel Machek
2001-01-16 13:47 ` jamal
2001-01-16 14:41 ` Pavel Machek
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