ROM Hack [Release] Monster Hunter Stories Save Editor MHSEC-G

[tadho]

@tadho
For some reason i didn't get an alert. Anyway.
I had a look at the decompiled bytecode and save related shit was heavily obfuscated. The decompiler could not even decompile without errors there. I have no idea how to properly reverse engineer that tbh.

If only someone could help me understand the assembly code in the screenshot below, I'm quite confident that I can write a script/program to mint the checksum for MHST mobile save file.

It's checkSaveData() function in lib/arm64-v8a/libMHR.so file inside the APK. I have like zero knowledge of assembly code, I can't do much here

 

[ghjfdtg]

@tadho
Do you have the Hex-rays decompiler plugin for AArch64? I was under the impression that stuff was written in Java. Did not even bother looking into the .so. Pretty funny they didn't even strip it from all symbols. With the decompiler it should be much easier.

 

[tadho]

@tadho
Do you have the Hex-rays decompiler plugin for AArch64? I was under the impression that stuff was written in Java. Did not even bother looking into the .so. Pretty funny they didn't even strip it from all symbols. With the decompiler it should be much easier.

yeah, I tried opening the .so file with Hopper and IDA warez (I guess IDA gives more information), I don't understand a single thing tho lol. I suppose most graphics-intensive Android games are written with JNI to ramp up the performance.

 

[ghjfdtg]

Just place the cursor inside the function and open a new decompiler view. Unfortunately i don't have the game data anymore. I deleted it.

 

[Xefraxciton]

So, Might I ask where the tutorial went? I'm just now trying this on for size, and have no idea where to find the important details.

 

[Xefraxciton]

Ver 0.13 Updated.

If you have the time, could I by any chance get the tutorial for this? I go to open the file, and it has disappeared. Perhaps you can help me with this?

 

[iSharingan]

So, Might I ask where the tutorial went? I'm just now trying this on for size, and have no idea where to find the important details.

Check the recent posts. I have a copy up.

 

[Xefraxciton]

Alright, cool. Now, does the tutorial show you how to upload a save by any chance?

 

[iSharingan]

Alright, cool. Now, does the tutorial show you how to upload a save by any chance?

No. There is no online editor if thats what you're thinking. You'll need to manage your save via JKSM/checkpoint with homebrew/cfw on the 3ds. Mobile is not supported at all.

 

[karikatourea]

Would it be somehow possible with this to add Navirou's outfit from the demo?
I started playing the full game directly and I don't know why I care, it annoys me a lot that it's now impossible to get. Still, I don't want to reset all those hours of my life just for that.

 

[iSharingan]

Would it be somehow possible with this to add Navirou's outfit from the demo?
I started playing the full game directly and I don't know why I care, it annoys me a lot that it's now impossible to get. Still, I don't want to reset all those hours of my life just for that.

if you're talking about on mobile, there's a tournament ruleset that gives the same rewards as the demo (rustshard, etc)

 

[karikatourea]

No, actually I'm talking about the old good traditional 3DS version.

[EDIT: I ...just got it. Huh.
Seriously, I did Google it thoroughly before asking here. By google, it was more or less impossible.
I did download the demo though, and by simply opening it and letting it create it's data, I got the outfit.
I guess I should experiment more and don't always trust Google too much ?]

 

[TKRZ_MTKRZ]

DUDE MY SAVE'S DEAD AFTER EVRY STUPID TIME I'M TRYIN' TO EDIT IT MY GAME CRASH EVERY SAVE LOAD!!!!!
IS THERE A WAY TO UNBREAK MY SAVE????

 

[JuanHecate]

After spending a lot of time and seeing that Capcom forgot update 1.3, I have a doubt, of causality there is already an MHST-SE for the Japanese version with its update 1.3? because the current one tries to use it with version 1.3 JAP and does not tell me the modification of the .sav and when I open the game in the editor's menu I do not get anything, I ask to know if the developers of the program followed up or are in that to get an update that works with 1.3

Who would say that this game after 2 years is still wanted despite its repetitive PVP as pokemon XD

 

[Maq47]

If only someone could help me understand the assembly code in the screenshot below, I'm quite confident that I can write a script/program to mint the checksum for MHST mobile save file.

It's checkSaveData() function in lib/arm64-v8a/libMHR.so file inside the APK. I have like zero knowledge of assembly code, I can't do much here

I figured out the checksum! It is a SHA-1 of the data from 0x40 to the end of the file, but the SHA-1 is separated into 4 byte chunks, and each chunk is byteswapped. @iSharingan, could you implement code to regenerate the checksum and post a PR here for it? Or anyone, really. I'll work on updating the offsets for the mobile version.

 

[Maq47]

I updated the offsets for mobile (I added Version.ANDROID, SAVE_FILE_SIZE_ANDROID, android armor, character, egg, egg fragment, item, monster, talisman, and weapon offset cases, and provided all offsets and sizes supported by the application for the 3DS). I also translated about half of the items in the Resources/idmap.txt file, and will very soon provide both "egg_dummy_template_android.bin" and "egg_null_template_android.bin" files since the Android version made egg data smaller by 0x12 bytes and monster data larger by 0x20 bytes. I currently already have the "egg_null_template_android.bin" file made, but need to make sure that my implementation of the dummy egg works properly first before pushing both files.

 

[iSharingan]

I figured out the checksum! It is a SHA-1 of the data from 0x40 to the end of the file, but the SHA-1 is separated into 4 byte chunks, and each chunk is byteswapped. @iSharingan, could you implement code to regenerate the checksum and post a PR here for it? Or anyone, really. I'll work on updating the offsets for the mobile version.

@tadho or @ghjfdtg are likely better choices, as I'm completely unfamiliar with coding checksum generators. tadho posted this earlier, so we should be in business:

If only someone could help me understand the assembly code in the screenshot below, I'm quite confident that I can write a script/program to mint the checksum for MHST mobile save file.

Also, if you like, I can share/add you to my googledocs spreadsheet where I was translating the items names (though I didn't really get any further than you have so far). By using the spreadsheet, it makes it easy to export by hiding/deleting the column with the japanese name and then copying the IDs next to the translated item names to paste into the editor's source files. also maybe enable the 'issues' tab on your github fork of the editor. I could have said this last part there if it was

 

[ghjfdtg]

I don't know C# unfortunately so i'm out. Bu it sounds easy enough. Just get a SHA1 lib (there is probably one included you can just use) and do the hashing/byte swapping stuff. It isn't hard at all.

 

[renkurogane]

Hello, TLDR: "Data expensive cant read for long"

Does OP still have the IDs for all the items, skills, genes ETC? because the google link he gave in first post is fried.

Would be grateful to get a working link.

 

[Maq47]

Also, if you like, I can share/add you to my googledocs spreadsheet where I was translating the items names (though I didn't really get any further than you have so far). By using the spreadsheet, it makes it easy to export by hiding/deleting the column with the japanese name and then copying the IDs next to the translated item names to paste into the editor's source files.

Sure. Send me a PM.

also maybe enable the 'issues' tab on your github fork of the editor. I could have said this last part there if it was

Done.

Hello, TLDR: "Data expensive cant read for long"

Does OP still have the IDs for all the items, skills, genes ETC? because the google link he gave in first post is fried.

Would be grateful to get a working link.

A working link can be found within Readme.md for my fork on my GitHub.