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

catlover007 · 2024-04-22T04:06:40+00:00

duckstation is an excellent Playstation 1 emulator by Stenzek. It has a very good compabiility and it is quite performant. It also supports all kinds of enhancements such as high resolution rendering and PGXP which can lessen the "wobble" and...

SARC Tool - A tool for extracting/packing SARC/SZS files | GBAtemp.net

AboodXD

I hack NSMB games, and other shiz.

Member

Level 12

Jul 1, 2018

SARC Tool v0.3
A tool for extracting/packing SARC/SZS files

Code:

Usage:
  main [option...] file/folder

Packing Options:
 -o <output>           output file name (Optional)
 -little               output will be in little endian if this is used
 -compress <level>     Yaz0 (SZS) compress the output with the specified level(0-9) (If unsure, use 1)
                       0: No compression (Fastest)
                       9: Best compression (Slowest)

Download.
Source code (GitHub).

Examples:

Extracting an szs file named "test.szs":
Code:
```
main test.szs
```
Extracting a sarc file named "test.sarc":
Code:
```
main test.sarc
```
Packing a folder named "test" as a big endian (Wii U) sarc file:
Code:
```
main test
```
Packing a folder named "test" as a little endian (3DS / Switch) sarc file:
Code:
```
main -little test
```
Packing a folder named "test" as a big endian (Wii U) sarc file with the file name "test2.sarc":
Code:
```
main -o test2.sarc test
```
Packing a folder named "test" as a big endian (Wii U) szs file using level 9 (best/slowest compression):
Code:
```
main -compress 9 test
```
Packing a folder named "test" as a little endian (3DS / Switch) szs file using level 9 (best/slowest compression):
Code:
```
main -little -compress 9 test
```
Packing a folder named "test" as a big endian (Wii U) szs file with the file name "test2.szs", using level 9 (best/slowest compression):
Code:
```
main -compress 9 -o test2.szs test
```

ROM Hack RELEASE SARC Tool - A tool for extracting/packing SARC/SZS files

I hack NSMB games, and other shiz.

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