# Minecraft Launcher by AnjoCaido

Reverse engineering of `Minecraft Launcher by AnjoCaido.exe`.

## Contents

```
MinecraftSP.jar   original payload jar (copied from the Wine temp dir)
extracted/        48 unpacked .class files
decompiled/       11 readable .java files (CFR 0.152)
cfr.jar           decompiler tool used (from Maven Central)
```

## Decompile again

```
java -jar cfr.jar extracted/net/minecraft/*.class \
     extracted/anjocaido/console/*.class \
     extracted/anjocaido/minecraftmanager/*.class \
     --outputdir decompiled
```

Note: CFR refuses the jar archive directly, decompile from the extracted class tree instead.

## Codebase

A repack of the 2010-2011 classic Mojang launcher (v12.2 era) with AnjoCaido additions.

- `net.minecraft` (original Mojang classes)
  - `MinecraftLauncher` entry point, heap check, relaunches itself with `-Xmx1024m`
  - `LoginForm` username only login, no server auth, remembers name in `lastlogin` (PBE encrypted, hard coded key `passwordfile`)
  - `LauncherFrame` main window
  - `GameUpdater` downloads from `http://s3.amazonaws.com/MinecraftDownload/` (long dead Mojang CDN, so updates and force update fail today)
  - `Launcher` embeds the game applet
  - `MinecraftUtil` working directory and OS detection
- `anjocaido.console`
  - `OutputConsole` game output window
- `anjocaido.minecraftmanager`
  - `MinecraftBackupManager` "Backup Manager" button: zips and restores `.minecraft` saves and game directories
  - `BackupUtil`, `Zipper` helpers
- `SevenZip/` bundled third party LZMA SDK, not part of the launcher code

## Security notes

Decompiled sources contain no suspicious code. Network access is limited to old Mojang endpoints (`s3.amazonaws.com`, `www.minecraft.net`) and a link to the author's YouTube channel.