1. ashtonmachchine

    OP ashtonmachchine Member
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    Hi Peeps! Any know if there is a way to make this possible?
     
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  2. Asia81

    Asia81 GBAtemp Guru
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    I was going to ask the same.
    I would like playing in 4k 60fps on PC, then transfer the save to the switch to play the extra-content.
    I didn't try and search to do it yet, but I hope it's possible.
     
  3. codychaosx

    codychaosx GBAtemp Advanced Fan
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    I'm really interested in this as well. I stopped playing on PC a ways back, but I would like to finish on my switch if it's possible :P
     
  4. juins

    juins GBAtemp Advanced Fan
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    bump, any new findings?
     
  5. unknowndatax

    unknowndatax Advanced Member
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    It's possible to transfer saves, but the PC version and Switch version does its encryption/decryption a little differently with the keys also being different.
     
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  6. rocky_2016

    rocky_2016 Advanced Member
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    could this is possible? it's like 2 different games, not just a port because i see the director told that their team rebuild it completely so it can be called as a remake
     
    Last edited by rocky_2016, Oct 28, 2019
  7. unknowndatax

    unknowndatax Advanced Member
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    If you want to check out the differences, I've attached my encryption/decryption tool. I've also attached the source code. This tool does not fix the checksum on the save, but when I have more time, I can update it.

    Edit 1 (10-29-19):
    I've updated the tool to get the checksum. You still have to fix it yourself.

    Code:
    Switch checksum location:
    File Size - 0x0c
    
    PC checksum location:
    0x04
    
     

    Attached Files:

    Last edited by unknowndatax, Oct 30, 2019
  8. xtremegamer

    xtremegamer Member
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    How do we fix it ourselves? I'm a little lost, sorry
     
  9. unknowndatax

    unknowndatax Advanced Member
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    Make sure to pick the correct platform for your save or it will not work since the keys are different.

    1) Decrypt the save
    2) Click "Get Checksum" and choose the decrypted save
    3) A message box will pop up with the checksum, write it down.
    4) In a hex editor replace what you were given, in the message box, and replace it at the address provided. (PC = 0x04, Switch = File size - 0xc)
    5) Encrypt the save
     
  10. olembet

    olembet Advanced Member
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    no, switch is superior version! so, no
     
  11. juins

    juins GBAtemp Advanced Fan
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    has @unknowndatax method worked for anyone? each time i attempt this all i get is no savefiles in the game on switch, as if its the first time game is loaded

    can anyone provide clearer instructions please, im a bit confused
     
  12. Blue

    Blue GBAtemp Addict
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    it doesn't look like it's a working tool to convert saves, just an encryption/decryption tool.
     
  13. juins

    juins GBAtemp Advanced Fan
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    so.. just to confirm 100%
    this doesnt actually convert saves at all? I thought it found the checksum so you could convert manually
     
  14. unknowndatax

    unknowndatax Advanced Member
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    The program will just Encrypt, Decrypt, and show the checksum of the save. You will have to manually convert the save to your desired platform. I was just only interested in the protection of the save and released a program so someone else interested in making an editor and/or converter can.
     
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  15. juins

    juins GBAtemp Advanced Fan
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    ah i see. ty for the clarification
     
  16. ctn

    ctn Member
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    Doing it manually got a little tedious, so I made a change to the app from @unknowndatax to save the checksum before encryption.
     

    Attached Files:

  17. PeregrineX

    PeregrineX Newbie
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    Hi, sorry to reply so much later. Just to confirm, if I follow these 5 steps above, does the save get converted? Ie. If I chance from 0x04 to 0xc will my save file become a switch save file?
     
  18. MegaMagikarp

    MegaMagikarp Advanced Member
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    Wow, you wrote that all yourself?
    The crypto is actually just AES...
     
  19. unknowndatax

    unknowndatax Advanced Member
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    At the time, IDA was acting up so I couldn't turn the ASM to C.I decided to translate it to C++ to improve my ASM translation skills. It was only when I finished the program and tried to optimize it a few weeks later did I realize it was AES-256 ECB 0 IV.
     
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  20. ashtonmachchine

    OP ashtonmachchine Member
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    Has anyone successfully converted their PC save file to the switch with this method?
     
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