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

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Betcha real tired of people asking if this work with Sky3DS.
Anyway, thank you for making this tutorial!
 

Agent Moose

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I tried to decrypt my mario kart 7 backup with rxTools 2.5.2 and it said it finished but I didn't see any extra files on the sd card. What files would be created?
 

medoli900

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I'm trying to rebuild Fantasy Life with 3DS Rebuilder, but when I choose the game in the gateway menu, it does nothing aside from stopping the swirling icons for a second. It does not recognize the exheader, so I have to add the information manually. The serial is CTR-P-AFLE, but I do not know the logo.
 

wiibomb

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hi, I was trying to decrypt my dump of MH4U, I was going through this step:

Put in the root of your SD Card :
- rxTool.dat
- slot0x25KeyX.bin (If your SysNand is 7.X or higher, your slot0x25KeyX.bin is useless)
- YourRom.3ds (or named as you want)
Launch the WebBrowser, erase cookies and data, and go to this URL:

http://dukesrg.no-ip.org/3ds/go/?rxTool.dat

but when I enter the URL the browser simply says that an error ocurred and doesn't load the rxTool.dat, can someone please help me?

I'm trying to access this through Sysnand on 4.5 (is that ok?) and the slot0x25KeyX.bin is the exact one from the package (does slot0x25KeyX.bin need any change?)

EDIT: I just tried to access the original url: http://launch.rxTools.net and it seems to be working by using the options given to me there, hope someone confirms this is ok

EDIT2: yeah, in the end working with just the other URL was perfect, everything was perfectly decrypted
 
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wiibomb

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I can not use 3DSExplorer open the .bcma file
It show me ‘This file is unsupported’...

I think that's a type or ARC file, you cannot open that with 3DS explorer, yo need to find another program for that.

----

I'm trying to rebuild my decrypted rom with the method of the tutorial, but when I put the rom into the gateway it just goes black when I enter, no 3ds logo or anything, i saw others had this problems, but I cannot find any kind of solution, yet, any help?

I didn't even edit it, I just want to make a test to make it work with the original files
 

Asia81

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I think that's a type or ARC file, you cannot open that with 3DS explorer, yo need to find another program for that.

----

I'm trying to rebuild my decrypted rom with the method of the tutorial, but when I put the rom into the gateway it just goes black when I enter, no 3ds logo or anything, i saw others had this problems, but I cannot find any kind of solution, yet, any help?

I didn't even edit it, I just want to make a test to make it work with the original files
If you made your game CARD2 with 3DSBuilder, try to make it CARD1
My BravelyDefaultUncensored is not working in CARD2
 

wiibomb

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If you made your game CARD2 with 3DSBuilder, try to make it CARD1
My BravelyDefaultUncensored is not working in CARD2
I'm trying to rebuild Monster Hunter 4 Ultimate, which I think is card2 by default, I thought it would be like that, but I'll try to do that, thanks for your reply
 

wiibomb

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MH4U is CARD1...
true.. I was mixing it up.. sorry

and well, after the rebuilding process from the 3DS builder, it finally loads the 3DS logo, but soonish after that, the screen just goes black forever... amy be any thoughts about what could be happening? I saw that the black screen was somewhat more common after the 3DS logo
 

wiibomb

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there is something weird, the .3ds rom after the process of the 3DS builder seems to be smaller than the normal rom

the normal one is 2.690.232 KB, while the one I build with the files is 2.658.016 KB... about 30MB of difference in data...
 

medoli900

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there is something weird, the .3ds rom after the process of the 3DS builder seems to be smaller than the normal rom

the normal one is 2.690.232 KB, while the one I build with the files is 2.658.016 KB... about 30MB of difference in data...
This is surely due to the fact that your ROM editing take less place in the ROM.

I still have my problem about Fantasy Life tough. I'm trying with the old rsf way, but then it is kinda hard since your tutorial does not cover it since you've updated it.
 

wiibomb

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This is surely due to the fact that your ROM editing take less place in the ROM.

I still have my problem about Fantasy Life tough. I'm trying with the old rsf way, but then it is kinda hard since your tutorial does not cover it since you've updated it.

the thing is, I didn't do anything, I need to rebuild the same files decrypted from the rom, I did absolutely no editing of anything..

why don't you try the method described here for the rebuilding?
 

medoli900

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I wrote some days ago that it does not work. I did not receive any reply since then.

Are you comparing the size of the untrim ROM with the size of the recompiled one? Because the recompiled one is, if I'm not mistaken, trimmed.
 

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