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LoginMe

A lightweight authentication plugin for cracked/offline-mode Minecraft servers. Supports Bukkit, Spigot, Paper, Purpur, Folia, BungeeCord, Waterfall, and Velocity — all in a single JAR.

Features

• Register and login system with /register and /login
• Passwords hashed with SHA-256 + random salt per player — never stored in plaintext
• Offline session cache — players don't need to re-login after briefly disconnecting
• Full movement, chat, and command restrictions until authenticated
• Blindness effect applied to unauthenticated players
• Login timeout on proxy (auto-kick if not logged in within X seconds)
• Session sharing — login once at the proxy, stays logged in across all backend servers
• No external database required — uses a simple flat file (players.dat)

Compatibility

Minecraft version: 1.21.1+

Installation

Standalone (Paper/Spigot only, no proxy): Drop LoginMe.jar into your server's plugins/ folder and restart.

With proxy (BungeeCord / Velocity): Drop LoginMe.jar into both the proxy plugins/ folder and every backend server's plugins/ folder. The proxy handles authentication and shares the session to backend servers automatically.

Commands

Configuration

Located at plugins/LoginMe/config.yml:

prefix: "&7[&bLoginMe&7] "

# How long to keep a session after a player disconnects
# Supports: s (seconds), m (minutes), h (hours), d (days)
offline-cache-duration: "5m"

# Proxy only: kick player if not logged in within this time after joining
login-timeout: "60s"

messages:
  login-success: "&aLogin successful!"
  already-logged-in: "&cYou are already logged in!"
  not-registered: "&cYou are not registered! Use /register <password> <confirm>"
  login-usage: "&cUsage: /login <password>"
  wrong-password: "&cWrong password!"
  register-success: "&aRegister successful!"
  already-registered: "&cYou are already registered! Use /login <password>"
  register-usage: "&cUsage: /register <password> <confirm>"
  password-mismatch: "&cPasswords do not match!"
  please-login: "&ePlease login with /login <password>"
  please-register: "&ePlease register with /register <password> <confirm>"
  must-login-first: "&cYou must login first!"
  must-login-chat: "&cYou must login first to chat!"
  login-timeout: "&cLogin timeout! Please reconnect and login."

titles:
  login-success: "&aLogin Successful!"
  login-success-subtitle: "&7Welcome back!"
  register-success: "&aRegister Successful!"
  register-success-subtitle: "&7Please login with /login <password>"

All messages support & color codes.

Data Storage

Player data is stored in plugins/LoginMe/players.dat. Each entry contains the player's UUID alongside a randomly generated salt and SHA-256 hash of their password. The file is human-readable but should not be edited manually.

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