How to decrypt 3DS ROM without console?

Discussion in '3DS - Flashcards & Custom Firmwares' started by Yoshimaster96, Jun 5, 2017.

  1. Yoshimaster96
    OP

    Yoshimaster96 Advanced Member

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    How would I decrypt a 3DS ROM without an actual 3DS, one that I found online? Since almost all of the keys have been found, I'd imagine I would just use one or two of them. But which one(s)? And are there additional steps?
     
    Last edited by Yoshimaster96, Jun 5, 2017
  2. nero99

    nero99 GBAtemp Advanced Maniac

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    Not possible to do without a 3ds/2ds that is able to run decrypt9.
     
  3. Slattz

    Slattz Easygoing Fairy

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    It is with the bootrom keys. Idk how you do it, but I know it's possible using boot9's keys.
    Also OP, those key mightn't be allowed on here, you should remove the link just to be safe.
     
  4. blujay

    blujay GBATemp's Official Warthog

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    I believe @ihaveamac has a tool that supports using the keys in bootROM
     
  5. ihaveamac

    ihaveamac GBAtemp Guru

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    latest ctrtool commits include the keys from the bootrom, so decrypting the contents directly isn't necessary.
     
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  6. blujay

    blujay GBATemp's Official Warthog

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    Wait, do they include the keys or add support for bootrom keys?
     
  7. ihaveamac

    ihaveamac GBAtemp Guru

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    keys are included
     
  8. blujay

    blujay GBATemp's Official Warthog

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    I thought that was illegal but ok
     
  9. Ryccardo

    Ryccardo WiiUaboo

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    Yeah, for you Americans only :P
     
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  10. kublai

    kublai GBAtemp Regular

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    Just for clarification and questions:
    1. You can decrypt a .3SD ROM with ctrtool?
    2. Can you also convert the .3DS ROM into a .CIA to install via homebrew?
    3. is there a GUI front end for ctrtool?

    Thanks.
     
  11. blujay

    blujay GBATemp's Official Warthog

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    1. If you build it yourself
    2. By using a different application
    3. No
     
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  12. ihaveamac

    ihaveamac GBAtemp Guru

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    not in the same method as GodMode9 and similar tools, it can just read encrypted titles properly and extract decrypted contents from it.
    https://github.com/ihaveamac/3dsconv or GodMode9 on console
    not that I know of, though none of them will probably support newer versions properly yet.
     
  13. kublai

    kublai GBAtemp Regular

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    Thanks both for the useful info.