[Release] .Net 3DS Toolkit - Extract and Repack 3DS ROMs (and CIAs)

Yes, it worked! But I had to build to Decrypted CXI (.3ds), then "verify and fix" in GM9, before it allowed me to convert it to cia and finally install it.
Building directly to Decrypted cia (shouldn't it be Encrypted..?) generates an invalid cia that cannot be salvaged.

 

Yes as long as it works
A question, if I modify files in the "decrypted banner" folder, are the changes taken into account when I rebuild the game?
Or is that folder just for convenience and not used on rebuild?

 

Is there a way to repack it as decrypted CXI? I just dumped all my games/updates/DLCs on 3DS to use with Citra, so I'm trying to merge all of them (CXI would be preferrable since its an exclusive format)

 

There is a version for Python3 from the quick installation tool. Any .3ds or .cia file we will drag on the _citra.py and in the _citra folder will appear .cxi files

 

No luck, the program closes as soon as I drag a file or folder (Tried with .cxi and renamed them to .cia, no use to at least throw an error) into _citra.py/_install.py.
DotNet 3DS Toolkit also thinks something's missing and doesn't allow me to rebuild to any format, not even rebuilding to .cia and re-extracting on the 3DS. I get "open file X:\!Emulators\!Updates\Super Smash Bros\game/HeaderExeFS.bin failed", same error for Header NCCH1.bin, NCCH2.bin, NCCH6.bin and NCCH7.bin. When trying to rebuild as .cxi/.3ds I get "NCCH header not found. This can happen if you extracted a CXI and are trying to rebuild a decrypted CCI. Try rebuilding as a key-0 encrypted CCI instead" which is exactly the case, but how'd I go about converting key-0 .3ds to .cxi? Or do I re-extract all games as .CIA and try rebuilding as .cxi instead?
Here's what my folder looks like:

 

I hope someone can help out to have this amended.

For all the newbies looking into merging updates into the full game for usage in Citra I'd like to share my 24h-newbie findings.
Btw, yes, I know Citra can install .cia updates.

Regardless of the error and hang when handling updates tool seems to extract all the files.
I have successfully extracted .3ds ROM and .cia update and merged them afterwords following instructions here:
community.citra-emu. org /t/need-help-trying-to-rebuild-cxi-file-along-with-game-update/2910/5
Those were the only instructions I was able to find for this goal.

My only change was renaming ExeFS\icon.icn to icon.bin and copying it over along with code.bin so icon gets updated as well, as it's the case with Pokemon Ultra Sun v1.2 EUR.
My other working example was TriForce Heroes v2.1.0 EUR. Regarding the Title ID part, after following instructions at:
github. com /ihaveamac/3DS-rom-tools/wiki/Edit-title-ID-with-extracted-NCCH-header-and-ExHeader
Title ID turned out to be the same in the .3ds and .cia files for both games so I had nothing to do with it.

Both newly built .3ds files boot fine in Citra, with proper version number displayed in-game.
I've got no clue if any of the remaining files should be carried over as well.

@evandixon Would be great if you could implement option for trimming.

 

i want to repack Pokemon X, but i got an error:
ERROR: open file C:\Users\john\Desktop\STORAGE\3DS Editor\Pokemon X\HeaderNCCH2.bin failed
ERROR: create file failed
ERROR: open file C:\Users\john\Desktop\STORAGE\3DS Editor\Pokemon X\HeaderNCCH6.bin failed
ERROR: create file failed

 

How long does it take to build a file as Decrypted CCI. The folder from which im building is solidly big (5.8 GB) but i feel like it takes way to long. It also showed me this error. Previously the Error /Exheader.bin was not found occured. I added said file but it clearly sparked a new problem. Should i remove all of these files? Is it just fine like it is and will just take some time?
Exception Details:
System.IO.FileNotFoundException: Die Datei "C:\Users\leonb\OneDrive\Desktop\fates randomizer\Fates Randomizer Beta 5-1\StoreFE\ExeFS\banner.bin" konnte nicht gefunden werden.

 

CCI/3DS it has maximum 5 NCCH partitions

0 Game Executable (the most important!!!)
1 Manual
2 Download Play Child container
6 New3DS Update Data
7 Old3DS Update Data


ERROR: open HeaderNCCH2.bin
ERROR: open HeaderNCCH6.bin

Means that "Download Play Child container" and "New3DS Update Data" are not in this image CCI/3DS