BitLocker: Extend OpenCL password length and use common tests

[kholia]

This tries to cleanup #2728 and extend it a bit.

@e-ago Please review this pull request and make sure that I have included all your code changes. Thanks!

@e-ago I have two requests for you. First, can you please add code comments in the OpenCL kernel? Specifically, I would like to know which parts of the kernel are doing SHA-256 operations, and which parts are doing the AES-CCM operations. Second, can support for password lengths < 8 be also added?

[magnumripper]

Second, can support for password lengths < 8 be also added?

Does BitLocker allow that in real life? If it does, this is absolutely mandatory.

[kholia]

@magnumripper I am wondering about the same. I will try generating such a test vector soon on Windows 10.

[kholia]

The minimum password length seems to be 8 for BitLocker,

[e-ago]

Thank you. Yes, 8 is the minimum length.

@kholia I will make a new PR (from an updated fork) to add the comments you requested.

[magnumripper]

https://technet.microsoft.com/en-us/library/jj679890(v=ws.11).aspx
Passwords must be at least 8 characters. To configure a greater minimum length for the password, enter the desired number of characters in the Minimum password length box.

If I get that technote right, it's configurable - but even then you can't set it shorter than 8.

[kholia]

@magnumripper I agree with your interpretation of the technote.