Homebrew Discussion Confirmed: Mario All Stars 3D Collection have 3 emulators

RyanB · Sep 16, 2020

Okay, I did a bit of testing. What someone said earlier is correct, exe, full, and media are completely useless. Only DOLHASH is important. If we can figure out how to get the correct hash for that, then that'll be the next step towards emulating GameCube games on the Switch.
The game crashes if DOLHASH is edited, but does not care if exe, full, or media are edited. I believe these might be leftover files from compilation.

GatoFiestero · Sep 16, 2020

Nerdtendo said:
I mean have we only tried sha-1 so far? Maybe we're using the wrong method

This:

D3fau4 said:
I said that but nobody understood:

Also the nro have the dolhash hardcode but patched that and i still dont working.

and exe, full and media i think is never checked. (i dont found references to that)

Deleted User · Sep 16, 2020

Nerdtendo said:
I mean have we only tried sha-1 so far? Maybe we're using the wrong method

People have been using a tool that checks in all kinds of ways. None have matched so far. Not SHA-1, not MD5, and not a few others.

Basketto · Sep 16, 2020

RyanB said:
Working on replacing GCM files at the moment. I don't recall who said that removing the first 100 bytes of the file should generate the same dolhash, but for me its generating something completely different.
Full GCM hash = 651AF1295D6874102B276A264B0DA37AB38303F7
100 byte removed hash = 5C211DBA8C35CE0C6ADAAC48D4296D3812250B7C
Official hashes:
"hash": {
"exe": "f4425036b50590ea5c9357580abe922decf72012",
"media": "763cae402272dd4fc428f45238c3ae040d6cb1a2",
"full": "b23b9b9ee9365e26f8159c36ae80981412bf7372"
}
dolhash: 4e10808fdbd8a8beefab38163bb43a5002f60d63

i think it was *bits* not bytes.

RyanB · Sep 16, 2020

StarGazerTom said:
People have been using a tool that checks in all kinds of ways. None have matched so far. Not SHA-1, not MD5, and not a few others.

It's probably a custom hash that Nintendo made and would require reverse engineering to figure out how it is decrypted.

Basketto said:
i think it was *bits* not bytes.

They said bytes.

Kirby567fan · Sep 16, 2020

D3fau4 said:
I said that but nobody understood:

Also the nro have the dolhash hardcode but patched that and i still dont working.

and exe, full and media i think is never checked. (i dont found references to that).
soooooooooooooooooo
as someone said in previous post these jsons are the minimum requirements

rom.json:

Code:

{ "UID": "MarioSunshine", "DolHash": null, // this does not matter "ROM": [ "rom:/MarioSunshine/Super_Mario_Sunshine_Stardust-trimmed.gcm" // editable ] }

MarioSunshine.config:

Code:

{ "Hagi" : { "Boot" : { "LoadBios" : false } } }

MarioSunshine.json

Code:

{ "Info": { "GCM": { "Name": "Super Mario Sunshine", // editable "CountryCode": "EU", // editable "GameID": "GMSP", "DVD": 0, "ROMVersion": 0, "GCMID": "GMSP.0.0" // editable }, "Hashes": {}, // this does not matter "UID": "MarioSunshine", "ShortName": "MarioSunshine" // editable }, "Mxic": { } // this does not matter }

Can I ask you how did you get the .dol file, the one I have still doesnt give the correct results for some reason.

D3fau4 · Sep 16, 2020

Kirby567fan said:
Can I ask you how did you get the .dol file, the one I have still doesnt give the correct results for some reason.

is just a normal iso, you can use any tool to extract gcm/iso files.
I am especially using a tool called "GameCube Files Tools 1.7.0"

Edit:

I don't know why I think people are ignoring my post asking himself questions that I have already answered

Basketto · Sep 16, 2020

RyanB said:
It's probably a custom hash that Nintendo made and would require reverse engineering to figure out how it is decrypted.

They said bytes.

ah they did too, apologies. No idea why the results are varied in that case.

Kirby567fan · Sep 16, 2020

D3fau4 said:
is just a normal iso, you can use any tool to extract gcm/iso files.
I am especially using a tool called "GameCube Files Tools 1.7.0"

Thanks for your answer!

SecureBoot · Sep 16, 2020

RyanB said:
It's probably a custom hash that Nintendo made and would require reverse engineering to figure out how it is decrypted.

They said bytes.

Is that something you figure out or brute force? I have a computer to share.

Deleted User · Sep 16, 2020

Wonder what would happen if you used all the same files from the built in iso, EXCEPT for swapping out the boot.dol file from a legacy gcm.

D3fau4 · Sep 16, 2020

StarGazerTom said:
Wonder what would happen if you used all the same files from the built in iso, EXCEPT for swapping out the boot.dol file from a legacy gcm.

crash screen

Deleted User · Sep 16, 2020

D3fau4 said:
crash screen

damn.

Tagg7 · Sep 16, 2020

Nerdtendo said:
Is that something you figure out or brute force? I have a computer to share.

It would be impossible to brute force from just one or even a handful of hashes. We'd have to reverse engineer the code that is checking the hashes to either bypass it or detect how the hash is computed.

Deleted User · Sep 16, 2020

Could be quicker to use Yuzu and IDA for slowing shit down, seeing what's happening when and where.

RyanB · Sep 16, 2020

Tagg7 said:
It would be impossible to brute force from just one or even a handful of hashes. We'd have to reverse engineer the code that is checking the hashes to either bypass it or detect how the hash is computed.

Unless we're all missing something obvious, this is the only option that remains and work should start on that immediately. I'll take a look at doing it tomorrow but I don't have much experience in reverse engineering Nintendo Switch executable formats.

Deleted User · Sep 16, 2020

*facepalm*

@D3fau4 If you look at your sha-1, there is number "3" added to it, while in code, it seem to stop at "6". But they werdly look very same.

D3fau4 · Sep 16, 2020

romain337 said:
*facepalm*

@D3fau4 If you look at your sha-1, there is number "3" added to it, while in code, it seem to stop at "6". But they werdly look very same.

nope is just ida:

SecureBoot · Sep 16, 2020

RyanB said:
Unless we're all missing something obvious, this is the only option that remains and work should start on that immediately. I'll take a look at doing it tomorrow but I don't have much experience in reverse engineering Nintendo Switch executable formats.

Well I have no idea how to do any sort of reverse engineering so you have a leg up on me

Deleted User · Sep 16, 2020

If I could extract the files without needing my switch (in another house, in storage), I'd try my hand at helping out. Anyone know how to extract the files without a switch? Google provides very little.

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