Keep posting BD VUKs?

[Electrox3d]

Do these get updated anymore? is there a new way to do this? or should I keep posting cps/vuk?

thanks,

[awhitehead]

Do these get updated anymore? is there a new way to do this? or should I keep posting cps/vuk?

thanks,

Please do keep posting new CPS/VUK.

The fact that there were very few updates just underscores the fact that few people have Blu-Ray drives in their computers. At the same time, almost every day people ask for means of decrypting a Blu-Ray disk in a PlayStation, or for keys for a specific Blu-Ray title. So anything you post will be gratefully accepted, and will be useful to someone.

Thank you for all the keys you posted already.
(And no, I don't own a Blu-Ray drive myself)

[Electrox3d]

Please do keep posting new CPS/VUK.

The fact that there were very few updates just underscores the fact that few people have Blu-Ray drives in their computers. At the same time, almost every day people ask for means of decrypting a Blu-Ray disk in a PlayStation, or for keys for a specific Blu-Ray title. So anything you post will be gratefully accepted, and will be useful to someone.

Thank you for all the keys you posted already.
(And no, I don't own a Blu-Ray drive myself)

I will keep posting CPS/VUK's, but are they really helping? They're just the 32-character keys, but the key's that are needed for the config file on page 1 are 40 character keys.

Do the CPS/VUK's actually help? Or are they a waste unless I've already got them in the 40-character format?

[awhitehead]

@ moderators: Is this the apropriate thread for this discussion? maybe it should be moved out into a new thread.


I will keep posting CPS/VUK's, but are they really helping? They're just the 32-character keys, but the key's that are needed for the config file on page 1 are 40 character keys.

Do the CPS/VUK's actually help? Or are they a waste unless I've already got them in the 40-character format?

40 character string is a SHA1 hash of a file <drive letter>\AACS\CPSUnit00001.cci (If I read the source code of BackupBluRay correctly). It was discovered pretty early on that this file is not unique, and there are quite a number of different movies with different VUKs, that have the same SHA1 hash of this file.

Thus SHA1 signature currently it is close to irrelevant, since in order to successfully decrypt the movie, person has to edit their CPSkey.cfg file by hand any way and make sure that the first line with the matching SHA1 hash has the correct VUK for the disk on hand. VUK on the other hand is important, as it is VUK that is used to decrypt the title keys, and generate unencrypted content at the end. There are tools such as validatevuk.exe that anyone using a Blu-Ray VUK should probably try first, before spending time to decrypt the movie.


Since anyone attempting to decrypta movie will have to edit CPSkey.cfg by hand (as otherwise they will run into SHA1 collision between different titles), they can add in the SHA1 signature for the disk they are decrypting themselves (and it's trivial to get the BackupBluRay to output SHA1 signature if it doesn't:

Just tack on something simiar to

System.out.println("SHA1 hash: " + Utils.toHexString(keyFileHash));
after
byte[] keyFileHash = Utils.hashFile(keyFile);
in aacs/main/BackupBluRay.java and rebuild the jar
)

So to summarize: No, posting CPS/VUKs is not irrelevant, and as long as you post what movie and region it is from, in addition to the VUK itself, it should be enough for an intermediate user to figure out how to decrypt the Blu-Ray title.

[blutach]

Posts moved. Let's leave the keys thread for keys only please.

Regards

[Electrox3d]

40 character string is a SHA1 hash of a file <drive letter>\AACS\CPSUnit00001.cci (If I read the source code of BackupBluRay correctly). It was discovered pretty early on that this file is not unique, and there are quite a number of different movies with different VUKs, that have the same SHA1 hash of this file.

Thus SHA1 signature currently it is close to irrelevant, since in order to successfully decrypt the movie, person has to edit their CPSkey.cfg file by hand any way and make sure that the first line with the matching SHA1 hash has the correct VUK for the disk on hand. VUK on the other hand is important, as it is VUK that is used to decrypt the title keys, and generate unencrypted content at the end. There are tools such as validatevuk.exe that anyone using a Blu-Ray VUK should probably try first, before spending time to decrypt the movie.


Since anyone attempting to decrypta movie will have to edit CPSkey.cfg by hand (as otherwise they will run into SHA1 collision between different titles), they can add in the SHA1 signature for the disk they are decrypting themselves (and it's trivial to get the BackupBluRay to output SHA1 signature if it doesn't:

Just tack on something simiar to

System.out.println("SHA1 hash: " + Utils.toHexString(keyFileHash));
after
byte[] keyFileHash = Utils.hashFile(keyFile);
in aacs/main/BackupBluRay.java and rebuild the jar
)

So to summarize: No, posting CPS/VUKs is not irrelevant, and as long as you post what movie and region it is from, in addition to the VUK itself, it should be enough for an intermediate user to figure out how to decrypt the Blu-Ray title.


How can SHA1 hash be close to irrelevant if you don't know it? If you don't know what the SHA1 hash is, then you don't know if its a duplicate or not, therefore you don't know what hash to use in BackupBluRay.

How do people find the SHA1 hash? (There is another post about a program that gives you everything needed to decrypt, but I don't think it gives the SHA1 hash...)