Hacking Nintendo Switch's encrypted persistent file

[Impossible_Igntiz]

I'm working on a uncensored mod for the Sakura games that are officially ported to the Nintendo Switch, been having alot of issues getting those titles specifically to work, copying and pasting doesn't work off the bat as their file/folder directory structure is very completely different to the Windows PC version's files... so i'd found out that the Switch's gallery .rpy file match that of the PC version with mention of adult folder and it's related .png files but of course that section goes disabled in-game and by just copying it doesn't work as it crashes the game automatically.

So i'd figure, if i could edit the persistent file from the Switch version and have the flag set it to True maybe then it can read it finally but one single problem is that the file is completely unreadable and i'm guessing it's encrypted somehow in someway....

Please to anybody that's more knowledgeable in this field can unencrypt it? Also if possible, can anyone take a look at ratacommon as well too? Thank You

 

[masagrator]

Looking by eye persistent is compressed with zlib. No encryption seems to be in use.

The same with file in ratacommon starting at 0x2E, before that is a header which I assume has compressed and decompressed size included.

 

[Impossible_Igntiz]

Looking by eye persistent is compressed with zlib. No encryption seems to be in use.

The same with file in ratacommon starting at 0x2E, before that is a header which I assume has compressed and decompressed size included.

oh okay so it does in fact did used zlib compression in someway, would just normal decompression with any of the tools available could crack it open?

For right now, i'm gonna try using the hacBrewPack to re-pack the files with included adult files and see if i could get any sorta success with that.

 

[masagrator]

In case of persistent standard zlib executable should be enough.
With second file issue complicates as you can easily decompress it by just deleting header, but compressing it back requires from you to put updated header to new file.

 

[Impossible_Igntiz]

In case of persistent standard zlib executable should be enough.
With second file issue complicates as you can easily decompress it by just deleting header, but compressing it back requires from you to put updated header to new file.

alright i'll keep that in mind, thank you very much! btw, re-creating the game via hacBrewPack refuse to boot the game.

is there anything you might know what i did wrong on my end?

this company sure knows what they're doing sheesh! it's not like anyone could easily get access to such files normally compared to the PC original...

 

[masagrator]

alright i'll keep that in mind, thank you very much! btw, re-creating the game via hacBrewPack refuse to boot the game.

is there anything you might know what i did wrong on my end?

this company sure knows what they're doing sheesh! it's not like anyone could easily get access to such files normally compared to the PC original...

Don't repack game. There is no logical reason (except one I guess which is not legal - make installable patch to reduce mod size) to use it when LayeredFS exists.

 

[Impossible_Igntiz]

Don't repack game. There is no logical reason (except one I guess which is not legal - make installable patch to reduce mod size) to use it when LayeredFS exists.

I tried many times doing so with LayeredFS but those .rpy & .rpyc are the majority of it's cause for it to not boot everytime.

 

[masagrator]

I tried many times doing so with LayeredFS but those .rpy & .rpyc are the majority of it's cause for it to not boot everytime.

And repacking won't change that. Issue lays elsewhere

 

[Impossible_Igntiz]

And repacking won't change that. Issue lays elsewhere

it's something they used, i'm completely out of options at the moment.... I guess extensive hacking is required for these ports and since no one seems interested right now i guess i'll have to give up for now

Thank you for helping out regardless, very appreciate it!

 

[Impossible_Igntiz]

I hink i may know how they're doing the file reading stuff, check this last file out whenever you can.

Every game i have, has this ~INDEX file included in all their releases.

this one is from Sakura MMO

 

[masagrator]

I hink i may know how they're doing the file reading stuff, check this last file out whenever you can.

Every game i have, has this ~INDEX file included in all their releases.

this one is from Sakura MMO

This is just file list.

 

[Impossible_Igntiz]

This is just file list.

I know, i was saying that this file list could be a hint as to how the game reads the files in it's directory and why the game crashes perhaps.