boost ArchiveStorageDecryptor.decrypt_block with cpp implementation

[AXiX-official]

On my device loading UnityCN encrypted file via
env = UnityPy.load(“test”)
For the original Python implementation, a 10MB file takes roughly 7.8s, and a 50MB file takes roughly 30s
But the cpp implementation only takes 0.076s and 0.24s respectively.
I can provide some test files if needed
(Only tested it on windows using msvc compilation, but I guess other platforms won't have any problems with it)

[K0lb3]

The core part looks good.
I just want some changes to the Python api usage.

[AXiX-official]

In fact, while self.index has a type hint of bytes but is assigned as a bytearray
guess u mean y* instead of y# refer
If self.index is acctually a bytes obj then maybe I can use y# so I don't have to deal with buffer and reference counting I guess
However, the official documentation says that y* is the recommended way to accept binary data
So I'm not really sure which to use.

[K0lb3]

You're right, I meant y* and not y#.

Thanks for the adjustments and also again for the work.