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From pvolcko@concentric.net Wed, 11 Aug 1999 10:11:28 -0400
Date: Wed, 11 Aug 1999 10:11:28 -0400
From: Paul Volcko pvolcko@concentric.net
Subject: [LinuxDVD] CSS decryption

Both the lists have calmed down considerably in the last couple 
weeks. I was wondering if there was any work being done still to 
reverse engineer the CSS decryption routines. Last I heard the 
assembly had been converted to C and that it had broken in the 
process (and that that was being worked on), but I haven't seen 
anything about it since. Anyone know whats happening with it or 
what software was being RE'd?

Paul Volcko
LSDVD Project

From mpav@purdue.edu Wed, 11 Aug 1999 10:11:55 -0500 (EST)
Date: Wed, 11 Aug 1999 10:11:55 -0500 (EST)
From: Matthew R. Pavlovich mpav@purdue.edu
Subject: [LinuxDVD] CSS decryption

> Anyone know whats happening with it or 
> what software was being RE'd?
> 

Openprojects went down last week and they are still rebuilding. The css
code has been converted to C and it has been tested to work. 

The cdrom patch has been the focus of recent work. The goal is to get the
DVD ioctrl's in kernel 2.4, and it looks like it is going to happen.

Matt

From axboe@image.dk Wed, 11 Aug 1999 17:27:08 +0200
Date: Wed, 11 Aug 1999 17:27:08 +0200
From: Jens Axboe axboe@image.dk
Subject: [Livid-dev] Re: [LinuxDVD] CSS decryption

On Wed, Aug 11 1999, Matthew R. Pavlovich wrote:
> The cdrom patch has been the focus of recent work. The goal is to get the
> DVD ioctrl's in kernel 2.4, and it looks like it is going to happen.

Yes, it has happened. The 2.3.13 kernel contains much of it,
minus the latest fixes. But I'll update it and keep the
kernel current.

-- 
* Jens Axboe <axboe@image.dk>
* Linux CD-ROM Maintainer
* http://www.kernel.dk

From pvolcko@concentric.net Wed, 11 Aug 1999 11:36:13 -0400
Date: Wed, 11 Aug 1999 11:36:13 -0400
From: Paul Volcko pvolcko@concentric.net
Subject: [LinuxDVD] CSS decryption

> Openprojects went down last week and they are still rebuilding. The css
> code has been converted to C and it has been tested to work. 

Okay, thats cool. 

> The cdrom patch has been the focus of recent work. The goal is to get the
> DVD ioctrl's in kernel 2.4, and it looks like it is going to happen.

Does anyone know what the software was that helped produce the 
CSS authentication code thats been published thus far? Has 
anything been heard from the guy who released it, specifically is he 
still working on it?

Good to see the ioctl's getting into the new kernel. I'm planning on 
testing out the patches in the next few days on my SCSI based 
system to see how things are working. I won't be able to put any 
time toward debugging and coding for it though as I'm busy with the 
LSDVD stuff. I'll report my success or problems with the patches 
though. They are meant to work with SCSI drives, correct?

Paul Volcko
LSDVD

From derek@spider.com Wed, 11 Aug 1999 17:53:51 +0100
Date: Wed, 11 Aug 1999 17:53:51 +0100
From: Derek Fawcus derek@spider.com
Subject: [LinuxDVD] CSS decryption

On Wed, Aug 11, 1999 at 11:36:13AM -0400, Paul Volcko wrote:
> > Openprojects went down last week and they are still rebuilding. The css
> > code has been converted to C and it has been tested to work. 
> 
> Okay, thats cool. 

There's a copy at www.eyrie.demon.co.uk/css/ if you want to see it.

One change is needed with the above stuff (it's behind the CVS), and
that is to change .key1 and .key2 in a couple of changes to .key in some
of the test programs. It's fairly obvious when it fails to compile with
the latest version of the cdrom patches.

> > The cdrom patch has been the focus of recent work. The goal is to get the
> > DVD ioctrl's in kernel 2.4, and it looks like it is going to happen.
> 
> Does anyone know what the software was that helped produce the 
> CSS authentication code thats been published thus far? Has 
> anything been heard from the guy who released it, specifically is he 
> still working on it?

No and No. I've heard a squeak that someone may be playing with the
actual data decryption stuff but so far not seen any function code.

> Good to see the ioctl's getting into the new kernel. I'm planning on 
> testing out the patches in the next few days on my SCSI based 
> system to see how things are working.

I'd be curious to see what sort of AGID values you get, and if two
consecutive runs give different AGIDs. On the ATAPI devide I've been
using I always get the same AGID value (3) returned to me.

DF
-- 
Derek Fawcus derek@spider.com
Spider Software Ltd. +44 (0) 131 475 7034

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