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.

Fusee.bin with the new Pre-release of Atmoshere 1.7.0

Mimikyu · 2024-03-30T15:42:14+00:00

Hello, little problem again... I tried to update my Switch again because of the new 18.0.0 Update of Nintendo. I'm reading a lot on the Website WiiDataBase and that's how and why i wanted to update now. My problem is that i can't access my custom...

Hacking Going from FW 501 to newer?

Thread starter Exist2Resist
Start date Jun 21, 2019
Views 1,976
Replies 24

stephrk398

Well-Known Member

Member

Level 8

Jun 21, 2019

Exist2Resist said:
Yes I'm on the latest OS

Are you on 8.0, 8.0.1 or all the way to 8.1?

Exist2Resist

Member

Newcomer

Level 1

Jun 21, 2019

stephrk398 said:
Are you on 8.0, 8.0.1 or all the way to 8.1?

I went all the way to 8.1

Kafluke

Well-Known Member

Member

Level 14

Jun 21, 2019

Exist2Resist said:
I went all the way to 8.1

Why did you update? I'm on sx os using 6.1 firmware and I've downloaded new games in xci format and I haven't had to update anything. Everything works fine.

Reactions: Exist2Resist

Exist2Resist

Member

Newcomer

Level 1

Jun 21, 2019

Kafluke said:
Why did you update? I'm on sx os using 6.1 firmware and I've downloaded new games in xci format and I haven't had to update anything. Everything works fine.

I dunno, I wanted the latest. Will downgrade to 6.1 and see what happens. I'm in RCM Mode so no burnt fuses.

Last edited by Exist2Resist, Jun 21, 2019

Exist2Resist

Member

Newcomer

Level 1

Jun 21, 2019

Kafluke said:
Why did you update? I'm on sx os using 6.1 firmware and I've downloaded new games in xci format and I haven't had to update anything. Everything works fine.

Downgrading to 6.1 resolved my issue. All my games work again.