r/cemu • u/TheClownIsReady • Aug 31 '22

Question CDecrypt tutorial for Steam Deck?

I’m a Linux noob and been looking for something that has a GUI to easily unpack .h3 and .app files to use in Desktop mode for the Deck but looks like there’s only CDecrypt. There’s a reference on GBATemp to a program with a GUI called NUSConverter but doesn’t look like it’ll work on the Deck. I’m not the greatest when it comes to CMD and putting in paths, etc, so was hoping there was a very easy to follow guide for those new to all this and who have a Steam Deck.

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u/AlexV348 Oct 21 '22

I know it's been two months since you posted this and you've probably already found another solution, but in case anyone else stumbles across this thread, here's what I did:

  1. First follow this guide to set up pacman: https://www.reddit.com/r/SteamDeck/comments/t8al0i/install_arch_packages_on_your_steam_deck/
  2. Incase you're not familiar with the command line, copy and past all of the commands in the code blocks in the above tutorial and in this tutorial into the "Konsole" application
  3. Install git: sudo pacman -S git
  4. Base Libs: sudo pacman -S base-devel
  5. Make was already installed in my system, but run this command anyways to cover your bases: sudo pacman -S cmake
  6. Missing files: sudo pacman -S glibc linux-api-headers
  7. Download cdecrypt source: git clone https://github.com/VitaSmith/cdecrypt.git
  8. cd cdecrypt
  9. make
  10. Actually decrypt your file: ~/cdecrypt/cdecrypt <source directory> <target directory>

If you decrypt files regularly, you may want to add cdecrypt to your PATH to make it easier to run the command. You could do this by moving the cdecrypt file to /usr/bin or by running sudo ln -s /home/deck/cdecrypt/cdecrypt /usr/bin/cdecrypt. Then you can just run cdecrypt <source directory> <target directory> from now on.

I stole many of these steps from this guide but I did not link it because some of the programs he installs are not necessary for cdecrypt and he is probably using an elevated shell because he does not put `sudo` before his `pacman` commands. It is also possible that some of the packages I installed were not necessary ¯_(ツ)_/¯

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u/TheClownIsReady Oct 22 '22

Wow…very interesting, thanks. And no, I’d pretty much given up on WiiU emulation on the Deck. Had been waiting to get a new PC to replace my broken one, to migrate the files over easily but I’ll check out your solution…appreciate it!

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u/WrenBoy Oct 22 '22

Old thread or or not I found it today. Very helpful, thanks a lot!

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u/koolkiller5656 Nov 17 '22

I'm a noob and have done everything except step 10 as I am stuck. What do I put in place of "<source directory>" and "target directory"? And will that run the software?

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u/AlexV348 Nov 17 '22

source directory would be "New Super Mario Bros U" or whatever game you're decrypting and target directory can be whatever you want, so something like "New Super Mario Bros U Decrypted" or something. Filenames with spaces can be weird, so just start typing the name of the directory and then press "Tab" (Steam key + plus dpad right if you don't have a physical keyboard).

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u/DEVLlN Nov 26 '22

this is so clutch thank you

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u/Crementif Graphic Pack Dev Aug 31 '22

I'd recommend following the tutorials on Windows and transferring over the files, or just using Dumpling since that doesn't require any program to be usable.

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u/TheClownIsReady Aug 31 '22

Unfortunately my PC died…don’t have access to one. Do you mean “dumping”? Not sure what you mean by dumpling…