speedy11cz / mcrpx

MCRPX is a tool to extract files from Minecraft: Java Edition resource packs into selected directory. It can also bypass corrupted resource packs, used by servers to protect their resource packs.

MineCraft Resource Pack eXtractor (MCRPX)

MCRPX is a tool to extract files from Minecraft: Java Edition resource packs into selected directory. It can also bypass corrupted resource packs, used by servers to protect their resource packs.

Download

MCRPX can be downloaded here.

How it works

It uses same method as Minecraft to load resource packs. Because Minecraft must be able to load corrupted resource packs, this allows us to extract them too.

How to use

This tool can be used only in GUI (recommended) or in CLI. You need to have Java 17 or higher installed on your computer.

Building

For building this project, you need JDK 17 or newer. Then, just run script gradlew build in project directory. You can find compiled JAR files in */build/libs directories.

Warning

Despite the fact that this tool allows extracting corrupted resource packs, please note that the content may be subject to copyright. Use this tool at your own risk.

mcrpx's Issues

Well

I don't see the point of this. You are contributing in helping people to steal/modify other people's work. Your repo says it itself: "It can bypass corrupted resource packs, used by servers to protect their resource packs.", so why making this tool? You made it even though you knew it was bad, and it is really disrespectful towards the work of people.

I'm myself using the corruption method to protect my resource packs, and knowing that people can just use this tool to steal my work is really discouraging.

ZIP_Read: corrupt zip file: invalid entry size

It extracts a few folders and images and then stops.

Improve resource pack decryption against "directory" obfuscation.

Description

MCRPX cannot handle resource packs produced by PackSquash (version after 2023-09-24 commit) with enabled obfuscation on disregard level.

Cause

On 2023-09-24, PackSquash improved resource pack encryption by obfuscating certain files and treating them as directories (see attached screenshots).

Steps to recreate

1. Download the latest PackSquash program artifact from GitHub Actions (not from "Releases" page!);
2. Download or/and extract any valid Minecraft resource pack in desired directory;
3. Create a new options file with .toml extension, then copy these settings:

pack_directory = "HERE_GOES_YOUR_RESOURCE_PACK_DIRECTORY"
size_increasing_zip_obfuscation = true
zip_spec_conformance_level = "disregard"

Replace HERE_GOES_YOUR_RESOURCE_PACK_DIRECTORY with your extracted resource pack directory and save the options file.

4. Open a terminal, go to the PackSquash program directory, run packsquash.exe "PATH_TO_OPTIONS_FILE.TOML". Replace PATH_TO_OPTIONS_FILE.TOML with your options file name;
5. Run MCPRX and try to extract encrypted resource pack.

Intended behavior

MCPRX exports encrypted resource pack.

Observed behavior

MCPRX throws an error: "Invalid input file! Must be resource pack or Minecraft jar file".

Screenshots

No any decryptions in RP

No any decryptions in RP. The process goes well, but nothing changes in my test RP that i'm encrypted by encryptmypack.com.
Can you explain how to decrypt some packs???

Improve