Hacking [Tutorial] How to Decrypt 3DS Roms for Dummies

[Ryanrocks462]

Hi guys!

I will describe an easy method for decrypting 3ds Roms.
IMPORTANT: Must Have a 3ds on Version 4.1-4.5
NEEDED FILES:
1. All Here in Zip file https://mega.co.nz/#!i0UhDRzR!vE1scmiuhRL9sKo6IhgrsbJSxgHZLpqlQIdJyvkIW84
Decrypting the Rom
0. First thing: Get a 3DS Rom... I will be using Mario Kart 7

1. - Drag rom onto ctrKeyGen and you will get a ncchinfo.bin

2. - Place ncchinfo.bin on root of SD Card with the Dumper/Launcher.dat

3. - Run on 3DS(system settings - other settings - profile - nintendo ds profile) and it will generate xorpads... use the Xorpad with the ''RomFS0''.xorpad in the name

4. - Use 3DS explorer and open the Rom/game and click Romfs.bin and save it ''Encrypted''

5. - Rename the Xorpad from CTP-GameID-Romfs0.xorpad to Romfs.xorpad

6. - Put Romfs.bin and Romfs.xorpad inside the 'workdir' folder.

7. - Run the batch file 1-decrypt.bat (just double click)

8. - Run the batch file 2-extract-romfs.bat (just double click)

9. - Complete, Rom fully Decrypted and ripped

Heres a video showing you incase you still need some help

 

[Huntereb]

Thanks, I'm gonna bookmark this for when I actually have a use for decrypting roms.

 

[NyaakoXD]

Now, if only there was an encryptor that works and lets modified roms be playable on Gateway/GW clones.

 

[Huntereb]

Now, if only there was an encryptor that works and lets modified roms be playable on Gateway/GW clones.

If only there was a publicly released way.

 

[endoverend]

What does decrypting ROMs accomplish? What can you do with a decrypted ROM?

 

[Ryanrocks462]

What does decrypting ROMs accomplish? What can you do with a decrypted ROM?

Play the audio files such as in mk7 no kart sounds in music direct rip and extract the Textures make custom tracks etc

 

[andibad]

What does decrypting ROMs accomplish? What can you do with a decrypted ROM?

1. get audio file
2. get text file and other specific game config file.
3. get models and sprite
4. just for fun =P

 

[CollosalPokemon]

Now, if only there was an encryptor that works and lets modified roms be playable on Gateway/GW clones.

It's been publicly possible to re-encrypt modified roms and use them on Gateway for over a month now. MT-Card joined that recently too. The other clones don't have homebrew support so they can't use modified roms, and they probably won't get support for quite a while if ever (at least at this rate).

I showed a PoC on September 4, but it became publicly possible to modify 3ds roms and use them as soon as the decryptor was released (August 29).

What I showed on September 4 is here :
http://gbatemp.net/threads/release-3ds_ctr_decryptor-void.370684/page-32#post-5091989

Since then there have been multiple users who have done modifications to other games. No one has released a 1-click noob tool because...well...I forgot why. I guess anyone capable is too lazy and frankly it's not hard if you understand the CCI format. I was thinking of making a public tool for it until I heard someone else was making one.

 

[Steena]

What about translations? That wouldn't still be possible?

 

[alepman90]

What about translations? That wouldn't still be possible?

same question,even though i think homebrew channel probably well make it possible.

 

[Orcastraw]

Translations would be possible when repacking tools are released.

 

[Vappy]

I was thinking of making a public tool for it until I heard someone else was making one.

I guess everyone who considered making a public tool heard someone else had the same plan and followed the same line of thought as you.

 

[pLaYeR^^]

Every time i start the 2-extract-romfs.bat i get an error. The 1-decrypt.bat works fine. Somebody know what the problem could be?

 

[Ryanrocks462]

Every time i start the 2-extract-romfs.bat i get an error. The 1-decrypt.bat works fine. Somebody know what the problem could be? View attachment 11327

which game are you trying to decrypt?

 

[pLaYeR^^]

which game are you trying to decrypt?

Mario Kart 7

 

[gtaking112]

Any word on decrypting roms with the 7.xx crypto?

 

[_eyCaRambA_]

Any word on decrypting roms with the 7.xx crypto?

Quite a few people are able to do it but there is no public way as of now sadly...

 

[Ryanrocks462]

Mario Kart 7

thats weird it should be fine then umm try redownloading the zip or re-extraxting the romfs.bin from 3dsexplorer

 

[gamesquest1]

Mario Kart 7

did you xor the romfs to get the decrypted romFS

 

[pLaYeR^^]

did you xor the romfs to get the decrypted romFS

I just press romfs.bin and save it, like in the video.