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.

Tutorial

editing Save data for Fallout Shelter

dump your save file drop and drag Vault1.sav into this website https://rakion99.github.io/shelter-editor/#shelter

restore save and profit

Reactions: OctolingRift, Pistakilla, OkazakiTheOtaku and 2 others

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Pistakilla

Member

Newcomer

Level 2

Jun 11, 2018

I already cheated it on my phone, but it's cool nevertheless. Thanks!

OctolingRift

Well-Known Member

Member

Level 2

Jun 12, 2018

Thanks!

Reactions: Naked_Snake

MrKlon

Member

Newcomer

Level 2

Jun 12, 2018

idk if its just my save but it says padding corrupt. i dumped my save with checkpoint

sammikins_th3_kitt3n

♾️Neurodivergent🏳️‍⚧️trans🍼crinklefur

Member

Level 10

Jun 19, 2018

how did you guys edit your saves? i just got a padding corrupt error

Naked_Snake

Constant Miscreant

Member

Level 9

Jun 19, 2018

Use the website I linked

sammikins_th3_kitt3n

♾️Neurodivergent🏳️‍⚧️trans🍼crinklefur

Member

Level 10

Jun 19, 2018

--------------------- MERGED ---------------------------

https://ibb.co/hR1Osy

Naked_Snake

Constant Miscreant

Member

Level 9

Jun 20, 2018

I have no idea worked for me as soon as it went live and I played it for 5 minutes than dumped my save, has there been an update since it has launched

sammikins_th3_kitt3n

♾️Neurodivergent🏳️‍⚧️trans🍼crinklefur

Member

Level 10

Jun 20, 2018

I don’t think there has been an update, as my switch says the game is at 1.00
Maybe FTP is messing with the file

Naked_Snake

Constant Miscreant

Member

Level 9

Jun 20, 2018

I dumped mine with checkpoint and manually copied it to my pc

MrKlon

Member

Newcomer

Level 2

Jun 22, 2018

i didnt use ftp i took my sd card out of the switch
il try a fresh dump i guess

Deleted User

Guest

Aug 23, 2018

i did this before and sometimes you have to edit it but not too much because the save file will get bigger than the file on your switch so it wont import for some reason