:godmode: Godmode9 :godmode:

A full access file browser for the 3DS console

GodMode9 is a full access file browser for the Nintendo 3DS console, giving you access to your SD card and to the FAT partitons inside your SysNAND and EmuNAND. Among other functionality (see below), you can copy, delete, rename files and create folders. A write permission system prevents you from doing dangerous stuff without noticing and forces you to enter unlock sequences for confirmation.

Warning

This is powerful stuff, but precautions are taken so you don't accidentially damage the filesystem of your console. The write permissions system protects you by providing warnings and forces you to enter an unlock sequence for enabling write permissions. It is not possible to overwrite or modify any important stuff without such unlock sequences and it is not possible to accidentially unlock something.

After unlocking write permissions on SysNAND, any writing change to your CTRNAND can result in a brick (still recoverable via A9LH). Writing changes to your TWLN partition can lead to a partial brick, leading to your console not being able to run DSiWare / DS cartridges anymore. If you unlock the A9LH write permission, you are able to overwrite and remove the A9LH installation in your system, which allows you to full brick your console (in that case, only recoverable via hardmod).

As always, be smart, keep backups, just to be safe.

What you can do with GodMode9

With the possibilites GodMode9 provides not everything may be obvious at first glance. So, for your convenience a (incomplete!) list of what GodMode9 can do follows below.

• Manage files on all your data storages: You wouldn't have expected this, right? Included are all standard file operations such as copy, delete, rename files and create folders. Use the L button to mark multiple files and apply file operations to multiple files at once.
• Make screenshots: Press R+L anywhere. Screenshots are in BMP format.
• Use multiple panes: Press R+left|right. This enables you to stay in one location in the first pane and open another in the second pane.
• Search drives and folders: Just press R+A on the drive / folder you want to search.
• Format your SD card / setup a RedNAND: Press the HOME button, select SD format menu. This also allows to setup a RedNAND on your SD card. You will get a warning prompt and an unlock sequence before any operation starts.
• Run it without an SD card / unmount the SD card: If no SD card is found, you will be offered to run without the SD card. You can also unmount and remount your SD card from the file system root at any point.
• Direct access to SD installed contents: Just take a look inside the A:/B: drives. One the fly crypto is taken care for, you can access this the same as any other content.
• Build CIAs from NCCH / NCSD (.3DS) / TMD (installed contents): Press A on the file you want converted, the option will be shown. Installed contents are found (among others) in 1:/titles/(SysNAND) and A:/titles/(SD installed). Where applicable, you will also be able to generate legit CIAs. Note: this works also from a file search.
• Decrypt and verify NCCH / NCSD / CIA / TMD / FIRM images: Options are found inside the A button menu. You will be able to decrypt to the standard output directory or (where applicable) in place.
• Batch mode for the above two operations: Just select multiple files of the same type via the L button, then press the A button on one of the selected files.
• Access any file inside NCCH / NCSD / CIA / FIRM images: Just mount the file via the A button menu and browse to the file you want.
• Generate XORpads for any NAND partition: Take a look inside the X: drive. You can use these XORpads for decryption of encrypted NAND images on PC. Additional tools such as 3dsFAT16Tool are required on PC.
• Directly mount and access NAND dumps or standard FAT images: Just press the A button on these files to get the option. You can only mount NAND dumps from the same console.
• Restore / dump NAND partitions or even full NANDs: Just take a look into the S: (or E:/ I:) drive. This is done the same as any other file operation.
• Compare and verify files: Press the A button on the first file, select Calculate SHA-256. Do the same for the second file. If the two files are identical, you will get a message about them being identical. On the SDCARD drive (0:) you can also write a SHA file, so you can check for any modifications at a later point.
• Hexview and hexedit any file: Press the A button on a file and select Show in Hexeditor. A button again enables edit mode, hold the A button and press arrow buttons to edit bytes. You will get an additional confirmation prompt to take over changes. Take note that for certain file, write permissions can't be enabled.
• Inject a file to another file: Put exactly one file (the file to be injected from) into the clipboard (via the Y button). Press A on the file to be injected to. There will be an option to inject the first file into it.

How to run this / entry points

GodMode9 can be built to run from a number of entry points, descriptions are below. Note that you need to be on or below 3DS firmware version v9.2 or have ARM9loaderhax installed for any of these to work. All entrypoint files are included in the release archive.

• A9LH & Brahma: Copy GodMode9.bin to somewhere on your SD card and run it via either Brahma or arm9loaderhax. Brahma derivatives / loaders (such as BrahmaLoader, BootCTR and CTR Boot Manager) and A9LH chainloaders (such as Luma3DS and BootCTR9) will work with this as well. Build this with make a9lh.
• Homebrew Launcher: Copy GodMode9.3dsx & GodMode9.smdh into /3DS/GodMode9 on your SD card. Run this via Smealums Homebrew Launcher, Mashers Grid Launcher or any other compatible software. Build this with make brahma.
• CakeHax Browser: Copy GodMode9.dat to the root of your SD card. You can then run it via http://dukesrg.github.io/?GodMode9.dat from your 3DS browser. Build this via make cakehax.
• CakeHax MSET: Copy GodMode9.dat to the root of your SD card and GodMode9.nds to anywhere on the SD card. You can then run it either via MSET and GodMode9.nds. Build this via make cakerop.
• Gateway Browser Exploit: Copy Launcher.dat to your SD card root and run this via http://go.gateway-3ds.com/ from your 3DS browser. Build this with make gateway. Please note: this entrypoint is deprecated. While it may still work at the present time with little to no problems, bugs will no more be fixed and it may be completely removed at a later time. Use CakeHax instead.

If you are a developer and you are building this, you may also just run make release to build all files at once. To build SafeMode9 (a bricksafe variant of GodMode9, with smaller functionality) instead of GodMode9, compile with make MODE=safe. For additional customization, you may also choose the internal font via make FONT=6X10, make FONT=ACORN, make FONT=GB and make FONT=ORIG.

Support files

For certain functionality, GodMode9 may need 'support files'. Support files can be placed into either 0:/(the SD root folder), 0:/files9/ or 1:/rw/files9/ (all locations will work). Support files contain additional information that is required in decryption operations. A list of support files, and what they do, is found below. Please don't ask for support files - find them yourself.

• aeskeydb.bin: This should contain 0x25keyX, 0x18keyX and 0x1BkeyX to enable decryption of 7x / Secure3 / Secure4 encrypted NCCH files and 0x11key95 / 0x11key96 for FIRM decrypt support. As an alternative (not recommended), legacy slot0x??key?.bin files are also supported. It can be created from your existing slot0x??key?.binfiles in Decrypt9 via the 'Build Key Database' feature.
• seeddb.bin: This file is required to decrypt and mount seed encrypted NCCHs and CIAs if the seed in question is not installed to your NAND. Note that your seeddb.bin must also contain the seed for the specific game you need to decrypt.
• otp.bin: This file is console-unique and is required - on entrypoints other than A9LH - for decryption of the 'secret' sector 0x96 on N3DS (and O3DS with a9lh installed). Refer to this guide for instructions on how to get your own otp.bin file.
• sector0x96.bin / secret_sector.bin : A copy of the decrypted, untouched (non-a9lh) secret sector. This is required for decryption of the encrypted ARM9 section of N3DS FIRMs. It is not required for anything else. As an alternative you can also provide the required keys inside your aeskeydb.bin.
• encTitleKeys.bin / decTitleKeys.bin: These files are optional and provide titlekeys, which are required to create updatable CIAs from NCCH / NCSD files. CIAs created without these files will still work, but won't be updatable from eShop.

License

You may use this under the terms of the GNU General Public License GPL v2 or under the terms of any later revisions of the GPL. Refer to the provided LICENSE.txt file for further information.

Credits

This tool would not have been possible without the help of numerous people. Thanks go to...

• Archshift, for providing the base project infrastructure
• Normmatt, for sdmmc.c / sdmmc.h and gamecart code
• Cha(N), Kane49, and all other FatFS contributors for FatFS
• SciResM for helping me figure out RomFS
• b1l1s for helping me figure out A9LH compatibility
• Gelex and AuroraWright for helping me figure out various things
• dark_samus for the new 6x10 font and help on various things
• WinterMute and YodaDaCoda for help testing DSi cart dumping
• Al3x_10m, Supster131, imanoob, Kasher_CS and all other fearless testers
• Shadowhand for being awesome and hosting my nightlies
• The fine folks on freenode #Cakey
• All 3dbrew.org editors
• Everyone I possibly forgot, if you think you deserve to be mentioned, just contact me!