Date: Thu, 19 Apr 2001 14:09:23 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: Jamie Bowden <ragnar@sysabend.org> Cc: freebsd-multimedia@FreeBSD.ORG Subject: Re: DVD drive. Message-ID: <20010419140923.A2284@Odin.AC.HMC.Edu> In-Reply-To: <Pine.BSF.4.10.10104191356190.84385-100000@moo.sysabend.org>; from ragnar@sysabend.org on Thu, Apr 19, 2001 at 01:59:38PM -0700 References: <20010419135144.A27643@Odin.AC.HMC.Edu> <Pine.BSF.4.10.10104191356190.84385-100000@moo.sysabend.org>
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[Trimmed -mobile as irrelavent.] On Thu, Apr 19, 2001 at 01:59:38PM -0700, Jamie Bowden wrote: > Maybe I'm just confused. I'm trying to use Charles Hannum's efdtt util to > access the file. > > >From the source: > > /* Usage is: cat title-key scrambled.vob | efdtt >clear.vob */ > > So what's going on here, is that I need something else just to read the > scrambled vob off the disc, beforce efdtt can unscramble it? I can only > assume the title key the the long string in the disc.id file. If someone > has an actual reference on how to use this, I'd really appreciate a > pointer. Yup, you're confused. ;-) There's hardware locking in the driver you must circumvent. That's what css-auth is for. I believe you just need to use css-auth to get the data off the disk and then any player will play it. The title key is actually encoded on the disk using player keys (many of which are unassigned). The player uses it's key to decode the title key which is used by code like efdtt to decode the stream into an MPEG2 stream. One of the things that the MPAA was pissed about in decss is that it stole a player key from XING (who violated their license agreement with the DVD-CCA by not hiding the key at all). It turns out that you don't need a player key though because the crypto used is so totally lame that you can just break it in a couple of minutes. -- Brooks -- Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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