ROM Hack [Tutorial] How to Decrypt, Extract & Rebuild 3DS|CIA|CXI Files

[Asia81]

Braindump is shitty, don't use it for romhacking in .3ds / .cia

Test Nisekoi.cxi vs Nisekoi.cia

RomFS Size (CIA) = 51,1Mb
RomFS Size (CXI) = 51,5Mb

Screenshots:

 

[Choromatsu]

Braindump is shitty, don't use it for romhacking in .3ds / .cia

Test Nisekoi.cxi vs Nisekoi.cia

RomFS Size (CIA) = 51,1Mb
RomFS Size (CXI) = 51,5Mb

Yeah, that's what I thought.
What's the best way to go about getting the RomFS folder instead of just a DecryptedRomFS.bin?

 

[Asia81]

...
You need to extract the RomFS file, then extract its contents in an ExtractedRomFS folder
Just follow the tutorial...

 

[Choromatsu]

...
You need to extract the RomFS file, then extract its contents in an ExtractedRomFS folder
Just follow the tutorial...

This is what I have in the folder after extracting:

And I assumed that the next step would be Extract data from a decrypted partition, so I run that on DecryptedRomFS.bin, and then I get this error:

Should I be doing something else? I don't see anything in the tutorial about it, which is why I was asking.

 

[Asia81]

your cia is not decrypted
and update to 5.2

 

[Choromatsu]

your cia is not decrypted
and update to 5.2

It is 5.2
So I'll try and decrypt it again, guess it didn't work the first time. Thanks!

 

[Asia81]

it's not 5.2, since it show the steps.
steps in 5.2 are hidden

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I know it's not decrypted, because your cia doesn't have the "strange date", such as 01/01/2015 when set using Decrypt9 decryption

 

[Choromatsu]

it's not 5.2, since it show the steps.
steps in 5.2 are hidden

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

I know it's not decrypted, because your cia doesn't have the "strange date", such as 01/01/2015 when set using Decrypt9 decryption

It's definitely 5.2 since I got it just this morning, actually.
I'll make sure it does so properly this time.

 

[Dylan the Tactician]

Hey, I'm using a Xenoblade Chronicles .3ds from Uncart (gasp, I know) and it DOESN'T LIKE ME. (it's a9lh uncart btw)

I can use FS1, select "Xenoblade.3ds" (what I renamed it from KTRblahblahblah), it'll extract "decryptedromfs.bin", save it, then it asks to extract it after giving this error:

Error, exheader hash mismatch. Wrong key?

I hit yes, and I get the following error:

Error, IVFC segment Corrupted
Error, RomFS corrupted

and then it says done.
HOWEVER, THIS ISN'T JUST XENOBLADE. EVERY .3DS I'VE TRIED THIS (and many other ways) WITH DOES THIS.
I'm actually on my grandma's computer atm, it's doing the same as on my laptop from earlier, which is the above.

So yeah, either this is something wrong or it's sever operator error (in which case please advise).

why does life have to hate me so much

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BTW the only reason I was using Braindump and .cxi was BECAUSE this didn't want to work, I have all the games I'm wanting to use dumped as .3ds as well

 

[Asia81]

For extract a .3ds dont use the fs1 key, but "d"

And please use a clean downloaded dump, or dump it yourself using the gateway launcher ( gw laucher make perfect dump)

 

[Dylan the Tactician]

For extract a .3ds dont use the fs1 key, but "d"

And please use a clean downloaded dump, or dump it yourself using the gateway launcher ( gw laucher make perfect dump)

I'll get gateway and try that then, but I've used D at LEAST 7 times with no success with roms that I have dumped myself with uncart.

does the world just hate me?

 

[Asia81]

be also sure your rom is decrypted
uncart and the gateway launcher dump encrypted games

 

[Dylan the Tactician]

-snip-

mind my idiocy while I go back and actually read your tutorial

 

[Dylan the Tactician]

Hey
Would a .3ds extracted from a .cia from Ciangel work just as fine? XD

(aka to lazy to rip OoT3d)

 

[dsync]

Hey there Asia81, following your tutorial and tool I managed to use BrainDump to dump a .cxi file and try to repack the untouched content to make sure the repacking success. However the game cart image doesn't shows up when I try to select it from Gateway ROM browser. Any idea as to why is this happening?

Also it seemed like Braindump cannot dump cia update file. The bottom screen simply stuck on the yellow screen.

 

[Ninoh-FOX]

some tool for edit code.bin?

 

[GalladeGuy]

some tool for edit code.bin?

IDA Pro and some knowledge of ARM Assembly.

 

[EternalSeekerX]

Guys why can't the DecryptedExHeader.bin obtained from Braindump not be used for the 3DS builder but the one got from Decrypt9 be used? Aren't they the same file? I am running the updated Braindump and it extracts the exeFS.bin, romFS.bin and the DecryptedExHeader.bin directly to the SD so I can extract and modify them normally and use the 3ds builder to get a .3ds and then convert to .cia and I can install this using FBI on my cfw sysnand 11 right?

 

[Stoned]

Use HackPack from Asia and the Decrypt9

 

[DarkMeowstic]

I tried the same process with two of my decrypted .3ds roms, with two different versions of HackingToolkit (4.3 and 5.2) but it doesn't extract anything!
It "extracts" too much fast (I can't even read the extracting process).