Get rid of brute forcing file seed

[Donkie]

Currently the file seed is attempted to be brute forced if the decrypt fails. I can't imagine this is how it's actually done in the engine. Figure out how to do this properly.

Bruteforcing added here: c68a32f

[thraidh]

According to a shapes unlocker script found on the internet, it seems that the key number is N-13, if N does not work.
Using the FileHeader.cs conventions the unlocker script does:
If b1==5 and b2==32: seed=b3-13
else if (b1==0 or b1==1) and b3==128: seed=b2-13
The script would set b2=0 for the first case and b3=0 for the second and write back those and the seed, so I guess those are the flags indicating the locked shapes.
Since I don't have any DLCs I cannot verify any of this.

[Donkie]

Thank you, I will look into that

[kbrandwijk]

If I'm not mistaken, that's FS19 and FS17 DLC logic, respectively.