readme

README.md

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+# 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.