This changes some parts of IOS (actually just ES) to reuse more crypto
code from IOSC or Common::AES.
TicketReader still returns the title key directly as opposed to having
ES use IOSC directly to avoid duplicating the title key IV stuff.
Side effects:
* A nasty unbounded array access bug is now fixed.
* ES_Decrypt/ES_Encrypt now returns sane results for keys other than
the SD key.
* Titles with a Korean ticket can now be decrypted properly.
And in the future, we can look into implementing ioctlv 0x3c and 0x3d
now that we have the proper "infra" for IOSC calls.
This moves all the byte swapping utilities into a header named Swap.h.
A dedicated header is much more preferable here due to the size of the
code itself. In general usage throughout the codebase, CommonFuncs.h was
generally only included for these functions anyway. These being in their
own header avoids dumping the lesser used utilities into scope. As well
as providing a localized area for more utilities related to byte
swapping in the future (should they be needed). This also makes it nicer
to identify which files depend on the byte swapping utilities in
particular.
Since this is a completely new header, moving the code uncovered a few
indirect includes, as well as making some other inclusions unnecessary.
Eventually, netplay will be able to use the host's NAND, but this could
still be useful in some cases; for TAS it definitely makes sense to have
a way to avoid using any preexisting NAND.
In terms of implementation: remove D_WIIUSER_IDX, which was just WIIROOT
+ "/", as well as some other indices which are pointless to have as
separate variables rather than just using the actual path (fixed, since
they're actual Wii NAND paths) at the call site. Then split off
D_SESSION_WIIROOT_IDX, which can point to the dummy NAND directory, from
D_WIIROOT_IDX, which always points to the "real" one the user
configured.
