Hand Shaker

⚠️ This project requires to be set up on both sides, client and server side ⚠️

🤝 HandShaker 7.0.0 (alpha) Wiki is there!

📋 What is HandShaker?

HandShaker is a cross-platform mod/plugin verification system for Minecraft servers and clients. It enables servers to detect which mods players are running and enforce mod restrictions with customizable policies.

🎯 Core Functionality

• Fabric/Neoforge Client → Sends your active mod list to the server upon join
• Paper/Fabric/NeoForge Server → Validates mod lists against configured rules and enforces restrictions
• Multi-platform Support → Works across Fabric, Paper, and NeoForge
• Cryptographic Integrity → Prevents tampered or self-compiled HandShaker mods
• Flexible Configuration → Per-mod rules: Required, Allowed, or Blacklisted

✨ Key Features

| Feature | Description |
| ——————————- | ——————————————————————- |
| 🔐 Per-Mod Configuration | Individually set mod allowance to Required, Allowed, or Blacklisted |
| 🚫 Customizable Enforcement | Configurable kick messages and auto-ban capabilities |
| 📊 Player History Database | Store and query player mod histories |
| 👀 Player Mod Viewing | Administrators can see other players’ mod lists |
| ✔️ Integrity Verification | Cryptographic signatures prevent spoofed mod reports |
| 🔐 Custom Actions | Allows to setup custom events (commands) for triggered mods |

🏗️ Platform Comparison

✅ Supported/Working
⚠️ Issues/Unsupported
❌ Unsupported/Broken

| Features | Paper (1.x – 6.x) | Fabric (2.x – 6.x) | NeoForge (6.x+) |
| ————————– |:—————————-:|:———————–:|:—————:|
| Integrity Checking | ✅ 6.x+
⚠️ 3.x – 5.x
| ✅ 6.x+
⚠️ 3.x – 5.x | ✅ 6.0.0+ |
| Configurable Rules | ✅ 6.0.0+ | ✅ 6.0.0+ | ✅ 6.0.0+ |
| Database Storage | ✅ 5.0.0+ | ✅ 5.0.0+ | ✅ 6.0.0+ |
| GeyserMC/Floodgate | ✅ 5.2.0+ | ✅ 5.2.0+ | ❌ |
| Permissions | ✅ 5.0.0+ | ✅ 5.0.0+ | ❌ |
| Folia Compatibility | ✅ 6.0.0+ | ❌ | ❌ |
| Clickable text in chat | ✅ | ❌ | ❌ |

🚀 Quick Start

Commands

Installation

1. Download the appropriate mod/plugin for your platform:

• Fabric Client: Place JAR in mods/ folder
• Paper Server: Place JAR in plugins/ folder
• NeoForge Client: Place JAR in mods/ folder

1. Configure the mod/plugin

Basic Configuration

config: v4

# Behavior: "strict" - Force requires client-side mod or "vanilla" allow also non-mod clients
behavior: strict

# Integrity Mode: "signed" or "dev" - allow unsigned mods (if you are building own client/server fork)
integrity-mode: signed

# Whitelist mode: true = only allowed mods (inside whitelisted.yml), false = allowed by default.
# To work properly set "mods-whitelisted-enabled" must be true
whitelist: false

# Allow Bedrock players
allow-bedrock-players: false

# Player Database: Store and track player mod history (requires playerdb to be enabled)
playerdb-enabled: false

# Mod List Toggles: Enable/disable each mod list without losing configuration
mods-required-enabled: true
mods-blacklisted-enabled: true
mods-whitelisted-enabled: true

# Kick Messages - customize as needed (use {mod} for mod name)
messages:
  kick: "You are using a blacklisted mod: {mod}. Please remove it to join this server."
  no-handshake: "To connect to this server please download 'Hand-shaker' mod."
  missing-whitelist: "You are missing required mods: {mod}. Please install them to join this server."
  invalid-signature: "Invalid client signature. Please use the official HandShaker client mod."

  ban: "You have been banned for using a blacklisted mod: {mod}."
  bedrock: "Bedrock players are not allowed on this server."
  # custom messages for actions can be added here
  # placeholders are {mod} - mod which triggered, {player}
  test_action: "Hi, {player}! You are using {mod}! Thanks for using it!"

actions:
# System actions (Uses hardcoded functions, not recomended to copy these)
  kick:
    commands:
      - "kick {player} {messages.kick}"

  ban:
    commands:
      - "ban {player} {messages.ban}"
    log: true
    
  log:
    missing: "{player} tried to join but missing required mod/mods: {mod}"
    blacklisted: "{player} tried to join with blacklisted mod/mods: {mod}"

# Examples of custom actions
# placeholders are {mod} - mod which triggered, {player}, {messages.name_from_config.yml}

  test_action:
    commands:
      - "msg {player} {messages.test_action}"
      - "give {player} minecraft:diamond 1"
      - "say Say Hello to {player}, who is using {mod}!"

  watchdog:
    commands:
      - "ac increase_alert_level {player} 1000"

📝 Permissions

| Permission | Description | Default |
| ——————- | ———————— | ——– |
| handshaker.admin | Access to admin commands | Operator |
| handshaker.bypass | Bypass mod restrictions | False |

🎮 Supported Versions

| Loader | Versions | Status | Versions | Status |
| ———— | ———————– | ———– | ——– | ——- |
| Fabric | 1.21 – 1.21.10, 1.21.11 | ✅ Supported | N/A | N/A |
| Paper | 1.21+ | ✅ Supported | N/A | N/A |
| NeoForge | 1.21 – 1.21.10, 1.21.11 | ✅ Supported | 1.20.1 | Planned |

📚 Documentation

• 📖 Full Wiki
• ⬇️ Installation Guide
• ⚙️ Configuration Guide
• 💬 Commands Reference
• 🔨 Building from Source
• 📋 Changelog

Roadmap

• More QoL features

🤝 Contributing

Issues, pull requests, and suggestions are welcome! Check the GitHub repository for contribution guidelines.