AuthCore

AuthCore is a secure authentication mod for Fabric 1.21.1 servers. It is designed to replace unstable login systems by providing player registration, login, local SQLite storage, and BCrypt password hashing.

It is a server-side-only mod: players do not need to install it on their clients.

Features

• Player account registration.
• Secure login system.
• Password changes.
• BCrypt password hashing.
• Local SQLite database.
• Configurable login timeout.
• Safe disconnection after the timeout expires.
• ActionBar instructions and countdown.
• Configurable Spanish messages.
• Blocks movement, interactions, items, attacks, blocks, and damage before login.
• Administrator commands.
• Compatible with Fabric 1.21.1 and Java 21.

Player Commands

Example:

/register MySecurePassword MySecurePassword
/login MySecurePassword
/changepassword MySecurePassword AnotherSecurePassword AnotherSecurePassword

Administrator Commands

These commands require permission level 4. For now, the target player must be online.

Configuration

On its first server start, AuthCore creates:

config/authcore.properties
config/authcore.db

authcore.properties lets you configure the login timeout and all Spanish messages. The authcore.db database stores registered accounts and their BCrypt password hashes.

Example:

login.timeout-seconds=60
messages.login-prompt=Inicia sesion con /login <contrasena>. Tiempo: {seconds}s
messages.register-prompt=Registrate con /register <contrasena> <confirmacion>. Tiempo: {seconds}s

After editing the configuration, restart the server or run:

/auth reload

Installation

1. Install Fabric Loader for Minecraft 1.21.1.
2. Install a Fabric API version compatible with 1.21.1.
3. Use Java 21.
4. Copy authcore-0.1.0.jar into the server's mods folder.
5. Remove any other authentication mod that may conflict with AuthCore.
6. Start the server.

AuthCore was built to provide a stable, secure, and extensible authentication foundation for Fabric servers.