ROM Hack MHX DLC Encryption

[Deleted member 369977]

Seems like Capcom has changed it! Two days later, damn!

I can make a new key for MHX. Wait a second.

--------------------- MERGED ---------------------------

http://pastebin.com/PLWzWs3j

 

[WeberFlux]

I can make a new key for MHX. Wait a second.

THANKS A LOT

I can make a new key for MHX. Wait a second.

--------------------- MERGED ---------------------------

http://pastebin.com/PLWzWs3j

THANKS A LOT!!! LOVE U!

 

[moghedien]

I finally figured out how exactly the game gets the key from the server. I'm working on making a homebrew app that can get the new keys for all regions. So you wont need NTR any more but unfortunately you'll still need homebrew access.

 

[kenshinjeff]

Very nice

 

[moghedien]

So, bad news... they finally blocked the ability to proxy in quests
They added signatures to the DLC.

They could have solved it long ago without even needing to update the game but Capcom likes to make things more complicated then they need to be, lol.

 

[Deleted member 369977]

So, bad news... they finally blocked the ability to proxy in quests
They added signatures to the DLC.

They could have solved it long ago without even needing to update the game but Capcom likes to make things more complicated then they need to be, lol.

When is the signature checked? When the quest is being downloaded?
And is the signature stored in the savefiles and checked again when you try to post the quest?

The game should have the code required to check the signature.

 

[moghedien]

When is the signature checked? When the quest is being downloaded?
And is the signature stored in the savefiles and checked again when you try to post the quest?

The game should have the code required to check the signature and thus we could make our own signatures.

It's only checked when it's downloaded, so we'll still be able to add custom quests directly to a save file using homebrew. And the signatures are made with 2048-bit RSA public/private key crypto. There's no way you'll ever be able to forge them (unless you happen to have a quantum computer).

 

[Deleted member 369977]

It's only checked when it's downloaded, so we'll still be able to add custom quests directly to a save file using homebrew. And the signatures are made with 2048-bit RSA public/private key crypto. There's no way you'll ever be able to forge them (unless you happen to have a quantum computer).

Yeah, I read something wrong when first answering. I made an edit to my original post. ( Brainfart.. ._. )

 

[moghedien]

I updated mhef with support for MHGen, including the "get_mhx_key.py" script. Since the key changes so often, I removed it from the code and you'll have to provide it as an argument when encrypting/decrypting now.
I'm still working on the homebrew app to get the keys, but hopefully I can finish it this weekend.

Edit: Here's the current keys if anyone needs them:
MHX JPN key = 3s8DywfYpz3gB9oeb0viLNanUCtRM92hOXwWFqXUf5yxPOiaJigjy3Tm
MHGen USA key = N3uExdqeA6r8jusbnN7mBRVWS8qe9sDaLe6viEVG
MHGen EUR key = Xx9WzvFbJ5j3UxM6s2Q4bwYcG3vSmpX7H5eNuWQy

 

[moghedien]

Also just added signature verification in the "dev" branch. Not much use but it's there for reference.

 

[HYC]

Hi Moghedien, may i have the latest of MHX JPN Key ？ Thanks guy.

 

[Deleted member 369977]

Hi Moghedien, may i have the latest of MHX JPN Key ？ Thanks guy.

http://pastebin.com/SY4mKVqa

 

[HYC]

Thanks imthe666st, It's worked

 

[moghedien]

I finally got it working! The new version of my MHX Data Manager homebrew application lets you get the encryption keys from all regions
That means you don't need CFW (just homebrew) and you don't even need any of the games to get the keys!

 

[HYC]

Really...? i will try it soon, thanks moghedien

--------------------- MERGED ---------------------------

moghedien, can you show the step how to get the key from your mhx data manager ? coz just see the files, i'm confuse. thanks a lot

 

[moghedien]

Really...? i will try it soon, thanks moghedien

--------------------- MERGED ---------------------------

moghedien, can you show the step how to get the key from your mhx data manager ? coz just see the files, i'm confuse. thanks a lot

When you use the "Get Encryption Keys" options it saves them to the "/3ds/mhx_data_manager/key/" folder. There should be a file for each region named "jpn.log", "eur.log", and "usa.log" and they're just text files. Open them in notepad or whatever.

 

[HYC]

When you use the "Get Encryption Keys" options it saves them to the "/3ds/mhx_data_manager/key/" folder. There should be a file for each region named "jpn.log", "eur.log", and "usa.log" and they're just text files. Open them in notepad or whatever.

So you mean, all procedure is control by your mhx data manager's command files using computer ? Is it need to install others software to use my 3ds link the server

 

[moghedien]

So you mean, all procedure is control by your mhx data manager's command files using computer ? Is it need to install others software to use my 3ds link the server

You need to run MHX Data Manager on your 3DS, then use the "Get Encryption Keys" option which will dump the keys to your SD card (in the "/3ds/mhx_data_manager/key/" folder). Then you can use those keys with mhef.

Also if you already have the quests in your save file, you can just use MHX Data Manager to export them from your save file and they're already decrypted.

 

[HYC]

After this procedure, i also can direct to get the key (exp: J7AoRSYGnw4PeBiI0DZLunPu1eGHQHHi1mQeRTc7ljSJp40wNLw9S8Pg) like that with the sametime ? Thanks guys

 

[moghedien]

After this procedure, i also can direct to get the key (exp: J7AoRSYGnw4PeBiI0DZLunPu1eGHQHHi1mQeRTc7ljSJp40wNLw9S8Pg) like that with the sametime ? Thanks guys

If I'm understanding your question, yes.