Hello guys, this is my first post here! I just got a MIG Switch card out of curiosity and I was tinkering with it. For those who don't know, it's used by placing XCI dumps as well as other game specific bin files in the sd card of the MIG Switch, and are obtained from the original cartridge by using an app like nxdumptool. Two of these bin files are mandatory to get the game to boot: Initial Data.bin and Certificate.bin. They stay the same for every cartridge of a specific game. Now, if you want to use an XCI dump from a shady website it's impossible to get it to work without those files. By using the Certificate.bin from another game it has no problem, but this does not count for the Initial Data.bin. So I looked for a way to obtain this Initial Data from an XCI file and read a bit of the XCI file documentation from switchbrew dot org. Here's what I understood so far: The Switch checks if the cartridge is valid by doing a challenge–response authentication on the Initial Data. The Package ID is contained both on the XCI and the Initial Data, on positions 0x110 and 0x0 respectively. The Initial Data hash is on the XCI at position 0x160. It is calculated by doing a SHA-256 hash on the full Initial Data content. So I was wondering, is there a way to to construct a functional Initial Data file starting from an XCI dump? I also tried a reverse approach by editing the Package ID in the Initial Data from another game, generating the Initial Data hash and putting it in the XCI file but is not enough to get the Switch believe it's a real game. Sorry if this may seem stupid but let me know what you think.

Hacking Question My Sysnand is clean ?

Thread starter Jeyseto
Start date Oct 26, 2019
Views 1,303
Replies 6

Jeyseto

Member

Newcomer

Oct 26, 2019

Hello everyone !
I launched hekate for the first time yesterday. and i had a problem with my pc and the backup of my sysnand ..
I used a CFW only in Emunand.
For you, the Sysnand in my swich is clean?

Hayato213

Newcomer

Member

Level 28

Oct 26, 2019

If you ever ran CFW on sysnand then it is not clean.

Jeyseto

Member

Newcomer

Level 1

Oct 26, 2019

Ok and if i have never ran CFW on sysnand it's ok ?

Hayato213

Newcomer

Member

Level 28

Oct 27, 2019

That is correct as long CFW has never been launch on Horizon OS via Sysnand.

Jeyseto

Member

Newcomer

Level 1

Oct 27, 2019

Great ! Thank's for all ! I will do a new back up now ^^

Jeyseto

Member

Newcomer

Level 1

Oct 27, 2019

Another question,
In this configuration, if i eject my sd card, if ran on OFW with my sysnand. Can i play online ?

Can i backup sysnand, inject modified save and restore the sysnand with modified save ?

Hayato213

Newcomer

Member

Level 28

Oct 27, 2019

Jeyseto said:
Another question,
In this configuration, if i eject my sd card, if ran on OFW with my sysnand. Can i play online ?

Can i backup sysnand, inject modified save and restore the sysnand with modified save ?

As long you don't launch CFW on your sysnand you can play online, there is a long guide to inject save into your sysnand but it is not worth the time.