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Old 18th January 2007, 11:56   #921  |  Link
Nomadic
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New version BackupHDDVD-GUI
changes:
- Decrypting file in separate thread (as yet one!)
- Progress bar while decrypting
- Minor fixes
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Old 18th January 2007, 12:04   #922  |  Link
hajj_3
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nomadic, what does this mean??

" Decrypting file in separate thread (as yet one!)"

thanks.
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Old 18th January 2007, 12:07   #923  |  Link
Nomadic
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that not to freeze an interface in the process of decoding
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Old 18th January 2007, 12:11   #924  |  Link
jokin
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Sendspace Mirror for updated GUI

Also,

1. Maybe you can have it list files and allow one to select certain files to decrypt. (File mode and a disc mode)

2. Make a button to stop or pause decryption?

Thanks for the great work.
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Old 18th January 2007, 13:55   #925  |  Link
Obveron
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Quote:
Originally Posted by madshi View Post
I don't have a HDCP compatible graphics card, so I'm thinking about using BackupHDDVD to be able to play my HD DVD discs. Now my question is:

Can I find out the keys of my own HD DVD discs by checking WinDVD memory without having a HDCP compatible graphics card? Or won't WinDVD have the keys in memory if I don't have a HDCP compatible graphics card?

Thanks!
I would also like to know the answer to this question.
From the following post from Muslix64, it seems that he was able to retrieve keys without a HDCP capable video card... But I can't be sure.
Quote:
Originally Posted by muslix64 View Post
But when I realized the 2 software players on windows don't allowed me to play the movie at all, because my video card is not HDCP compliant and because I have a HD monitor plugged with DVI interface, I started to get mad... This is not what we can call "fair use"! So I decide to decrypt that movie.
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Old 18th January 2007, 14:05   #926  |  Link
He-Man
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Quote:
Originally Posted by Touffi View Post
Second question, BackupHDDVD seems to work with Volume Unique Keys only, so what are the Variants used for ? Section 3.5 states that Title Key is computed with this formula : Kt = AES-128D(Ku, Kte). Kte being the encrypted Title Key and Ku "one of the volume unique keys defined in Section 3.3". Section 3.3 explains how to compute Volume Unique Keys (Kvu) and Volume Unique Keys Variants (Kvvu). So that would mean that we can feed BackupHDDVD either with a Kvu or au Kvvu and that you only need one of them to decrypt Title Keys ?

Well, I'm confused
Here's an article discussing Volume Variant Unique Keys, maybe this will be to some help?
AACS: Sequence Keys and Tracing: http://www.freedom-to-tinker.com/?p=1110

Last edited by He-Man; 18th January 2007 at 14:12.
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Old 18th January 2007, 14:30   #927  |  Link
Touffi
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Quote:
Originally Posted by He-Man View Post
Here's an article discussing Volume Variant Unique Keys, maybe this will be to some help?
AACS: Sequence Keys and Tracing: http://www.freedom-to-tinker.com/?p=1110
Great reading

I went to this site yesterday while googling but this post hadn't been published yet
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Old 18th January 2007, 16:54   #928  |  Link
The_ByteMaster
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Quote:
Originally Posted by He-Man View Post
Here's an article discussing Volume Variant Unique Keys, maybe this will be to some help?
AACS: Sequence Keys and Tracing: http://www.freedom-to-tinker.com/?p=1110
From the article:
"The effect of this is that the movie will look slightly different, depending on which player was used to decrypt it."

So depending on your player, Han will shoot first, or not?

I'm only kidding of course, it stands to reason the differences wouldn't be noticable to the human eye. This will just result in a cat-and-mouse game between Fair Use people who compromise players (nab required decryption keys from memory) and the content providers. It doesn't really matter if you only get updates say a couple of times per year, as long as those updates work with all currently available discs.

Once a future version of BackupHDDVD encounters a P-EVOB which needs SKB processing it perhaps will just consult the file SKBDB.cfg to get the required keys.

For now the BackupHDDVD modders can just check for the presence of AACS/SKB.AACS and AACS/SKF.AACS: "no SKBF and no SKF shall be present on a HD DVD-Video ROM medium which contains no P-EVOB with Sequence Key Sections."
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Old 18th January 2007, 16:55   #929  |  Link
jokin
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With the newest version of the GUI I get this error on 4 discs.
Could not find keyFile "O:\aacs\VTKF.AACS". Aborting...
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Old 18th January 2007, 17:18   #930  |  Link
NghtShd
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Quote:
Originally Posted by Ábudos View Post
Here's what I found:

01 = D32238519C4DA3BD395348B3E50B274E
02 = 92946B88A06967661B8491B18E488BF7
03 = 9810826ECB07414312CBA26245823942
04 = DD96EF42FF22B228EE9284DCB6180C43
05 = 2D81BC9FBB80FB5D25ED53616C9A0E79
06 = 9F269E568097C7CCD83BAD3511D82BA7
07 = 5E465FF6144864A0D23AE3CB776A15BC
08 = 8902AC657C91297DB03C21285FDD5B5D
09 = 7418D2A78417D093665321BED1790EF1
10 = 8DA3FBCC6E585DF13C28418EB2D10283
11 = FC087EBBC632EFBE4F48158009CF4E7D
Thanks very much, Ábudos. Setting up the decryption in C# is a bit different than in Java.

Update:
Somehow I had put the wrong volume key in my test CFG file. Everything looks good now that I fixed that. Thanks again for your help.

Last edited by NghtShd; 18th January 2007 at 18:07. Reason: updated info
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Old 18th January 2007, 18:41   #931  |  Link
muslix64
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The date field

By now, some people may wonder "Why did he put a date field in the keydb.cfg?"
Even if this field seems useless for now, it will be very usefull in the future. When revocation and, may be other countermesures will kick in, it will be usefull.
Movies manufatured in a certain time frame may have special features, we never know...

So I strongly suggest you to use the date field now to prepare for the future...
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Old 18th January 2007, 18:44   #932  |  Link
evdberg
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Hi Musli-X64 ... I wonder more why you write 0x7F to the MSB of VOBU_EndAddress? This value is correct in the original files, so why change it? I know you did some experimenting and it *seemed* to fix the 'nav chain problem', as you call it, but it also may cause new problems (see reported problems on this forum).
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Old 18th January 2007, 18:50   #933  |  Link
muslix64
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You are right. Try to play a evo file with PowerDVD without that fix. It do a lot of frame skipping. This is a PowerDVD problem, so this fix is just a workaround a player problem.
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Old 18th January 2007, 18:53   #934  |  Link
Coderjoe
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Quote:
Originally Posted by muslix64 View Post
By now, some people may wonder "Why did he put a date field in the keydb.cfg?"
Even if this field seems useless for now, it will be very usefull in the future. When revocation and, may be other countermesures will kick in, it will be usefull.
I don't really think revocation matters. Kvu and Kt are both after the revocation steps (from the version of the specs I have read, anyway). The only place the revocation currently matters is in WinDVD or PowerDVD, where everyone is currently snatching the keys from.
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Old 18th January 2007, 18:57   #935  |  Link
muslix64
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But, may be other countermesures we don't even think of, will kick in sooner or later. It's always usefull to know the manufaturing date of a movie.
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Old 18th January 2007, 19:17   #936  |  Link
evdberg
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Quote:
This is a PowerDVD problem, so this fix is just a workaround a player problem.
I assume you mean it is a specific problem of PowerDVD 6.5? Did you also try V7.2? Or do you have the same problem as I do that V7.2 is bitching that your system is not qualified to play HD-DVD?
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Old 18th January 2007, 19:22   #937  |  Link
hajj_3
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muslix64, what do you think about the GUI version of 1.00. any ideas how the IME can be fixed?? you havent posted in a few days, there has been alot of development since then.

Last edited by hajj_3; 18th January 2007 at 20:44.
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Old 18th January 2007, 20:40   #938  |  Link
muslix64
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@evdberg
Yes it's a bug with 6.5. I don't have V7.2. may be it work well with 7.2

@hajj_3
I did not try the GUI version yet. I'm not working on IME bug. I think you have to remove some sub streams in the stream, but I leave that to demuxing experts. I'm more into crypto than media format stuff.

This is a player bug, not a BackupHDDVD bug. The decryption works fine.

Did someone was able to play a movie with IME so far?

Last edited by muslix64; 18th January 2007 at 20:43.
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Old 18th January 2007, 20:42   #939  |  Link
noclip
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Muslix: Do you have a SourceForge account? PM me your username and I will add you as a developer.
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Old 18th January 2007, 20:47   #940  |  Link
muslix64
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Thanks noclip. But I leave that to serious coders. I'm good at proof of concept software, not production grade software.
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