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Obfuscation


Mine215

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Hello! I recently lost all the source code to a mod I have been working on and no longer can edit its code. I was lucky and found a version of the mod compiled (in a JAR file) which I then used with luyten to decompile and attempt to use. The problem now is that a lot of the methods are now obfuscated. I was wondering if there was anything I could do to deobfuscate my own code? I know that forge does it when decompiling mc but I want to do it after mc has been decomplied. Is there a task to run for that? Thanks in advance!

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Hello there, depending on the version of forge/minecraft there is a csv file provided in forge which contains mappings (i.e. obfuscated method name A = not obfuscated method name). You could then use a framework like javassist to remap the method calls/field accesses using this info (or do it manually using something like notepad++ with the replace in files function). Either way this is a lot of work not gonna lie your probably better off just rewriting your mod you should still be able to copy half of your stuff over so it should be a reasonably quick process.

 

There used to be a way to do this using mcp but the last time I attempted any such things is probably 6 years ago for < Minecraft 1.4 not sure if these tools still exist and to what extend they can still be made to do this.

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Just now, UXELDUXEL said:

Hello there, depending on the version of forge/minecraft there is a csv file provided in forge which contains mappings (i.e. obfuscated method name A = not obfuscated method name). You could then use a framework like javassist to remap the method calls/field accesses using this info (or do it manually using something like notepad++ with the replace in files function). Either way this is a lot of work not gonna lie your probably better off just rewriting your mod you should still be able to copy half of your stuff over so it should be a reasonably quick process.

 

There used to be a way to do this using mcp but the last time I attempted any such things is probably 6 years ago for < Minecraft 1.4 not sure if these tools still exist and to what extend they can still be made to do this.

Funny thing is I found those CSV files and I am using them right now! They are working pretty well except they are missing a few functions that I cant seem to find. Other than that I managed to deobfuscate a large portion. Do you have any suggestions for finding these missing mappings?

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No this CSV file is the only thing I have ever used.

Altho I have not looked for further mappings.

I am not developing mods myself, I fix mods that other people made mainly so they can be actually used in a server.

So i don't really have a need to see the full source code of a mod.

I only need to find the portion that buggy (or has you know, remote code execution exploits...) and then fix it using whatever means necesarry.

 

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