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.

duckstation for Switch

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ROM Hack Question Any way to get custom skins in Minecraft Nintendo switch edition without checkpoint

Thread starter Deleted User
Start date Feb 14, 2020
Views 15,332
Replies 7

Deleted User

Guest

Feb 14, 2020

I have the game installed onto sd card, possibly the Minecraft data on there could be extracted on a pc and edited, could that be possible?

kidkat210

Well-Known Member

Member

Level 11

Feb 16, 2020

Are you using a cfw? Just trying to cover bases here.

Deleted User

Guest

Feb 16, 2020

No because I'm on a switch lite and don't wanna get console banned again

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kidkat210 said:
Are you using a cfw? Just trying to cover bases here.

My game is in cartridge form

kidkat210

Well-Known Member

Member

Level 11

Feb 16, 2020

Then there is no way sadly

Deleted User

Guest

Feb 16, 2020

Can't people just find a way to modify the game by using the files put in the SD card??

kidkat210

Well-Known Member

Member

Level 11

Feb 16, 2020

Well for the system to read unsigned code you need cfw. You can probably find the save file in your nintendo folder but its gonna be encrypted

Deleted User

Guest

Feb 16, 2020

kidkat210 said:
Well for the system to read unsigned code you need cfw. You can probably find the save file in your nintendo folder but its gonna be encrypted

Well someone needs to make a decryptor