Fix parsing of illegal uuids with spaces

Bump advanced-security/maven-dependency-submission-action from 3.0.2 to 4.0.0

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -0,0 +1,69 @@
+name: 🐞 Bug Report
+description: Something isn't working, broken, not expected behavior
+labels: [ bug ]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This ticket is about bugs, so broken, not expected behavior. Feedback about this form is appreciated.
+  - type: textarea
+    attributes:
+      label: What happened?
+      description: What behavior is observed?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What did you expect?
+      description: What behavior is expected?
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: The actions that cause the issues. Please explain it in detail.
+  - type: input
+    attributes:
+      label: Plugin list
+      description: This can be found by running `/pl`
+      placeholder: AuthMe, ProtocolLib, ...
+  - type: input
+    attributes:
+      label: Configuration file
+      description: |
+        Link to the contents of your config.yml file.
+        You can use [GitHub](https://gist.github.com/), [Hastebin](https://hastebin.com) or similar for that.
+      placeholder: https://gist.github.com/games647/88c4439e1cd7810f21318b1b24a04ee0
+  - type: textarea
+    attributes:
+      label: Server log
+      description: The error, stacktrace or link the complete log. You can use the links above for long versions.
+      placeholder: https://www.toptal.com/developers/hastebin / https://gist.github.com/
+  - type: input
+    attributes:
+      label: Plugin version
+      description: Plugin version or build number. This can be found by running `/version plugin-name`
+      placeholder: v3.1-SNAPSHOT-570b321
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: Platform
+      description: Server software - choose your proxy software if you have multiple servers
+      options:
+        - Spigot
+        - BungeeCord
+        - Velocity
+    validations:
+      required: true
+  - type: checkboxes
+    attributes:
+      label: Relevance
+      description: Check list for previous tickets
+      options:
+        - label: |
+            I tried the [latest build](https://ci.codemc.io/job/Games647/job/FastLogin/) 
+            (build refers to development builds not necessary a release version; i.e. v1.10 is out of date)
+          required: true
+        - label: |
+            I checked for existing tickets -
+            If there are, please vote them with a thumbs reaction and not create new ones
+          required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,12 @@
+# General configuration for issue templates
+
+# Allow issues without a template
+#blank_issues_enabled: false
+
+# Extra section on creating issues to redirect to another site
+contact_links:
+  - name: 📌 Questions
+    url: https://github.com/games647/FastLogin/discussions
+    about:
+      You want to ask something - general questions. Example includes how to set it up or how it is working internally
+

.github/ISSUE_TEMPLATE/enhancement_request.yaml

@@ -0,0 +1,43 @@
+name: 💡 Enhancement request
+description: New feature or change request
+labels: [ enhancement ]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This ticket is about suggestions for a feature or particular enhancement. 
+        Feedback about this form is appreciated.
+  - type: textarea
+    attributes:
+      label: Is your feature request related to a problem? Please describe.
+      description: A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Describe the solution you'd like
+      description: A clear and concise description of what you want to happen.
+  - type: textarea
+    attributes:
+      label: Describe alternatives you've considered
+      description: A clear and concise description of any alternative solutions or features you've considered.
+  - type: dropdown
+    attributes:
+      label: Platform
+      description: Server software - choose your proxy software if you have multiple servers
+      options:
+        - Spigot
+        - BungeeCord
+        - Velocity
+        - All / Shared
+    validations:
+      required: true
+  - type: checkboxes
+    attributes:
+      label: Relevance
+      description: Check list for previous tickets
+      options:
+        - label: |
+            I checked for existing tickets -
+            If there are, please vote them with a thumbs reaction and not create new ones
+          required: true

.github/dependabot.yml

@@ -0,0 +1,35 @@
+version: 2
+
+updates:
+  # Updates for workflow files
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "monthly"
+
+  # Maven project
+  - package-ecosystem: maven
+    directory: "/"
+    schedule:
+      interval: weekly
+
+    groups:
+      production-dependencies:
+        dependency-type: "production"
+      development-dependencies:
+        dependency-type: "development"
+        exclude-patterns:
+          # Create single PR for these
+          # Plugin require special evaluation about their compatibility
+          - "com.lenis0012.bukkit:loginsecurity"
+          - "com.comphenix.protocol:ProtocolLib"
+
+    ignore:
+      # HikariCP dropped Java 8 support with 5.0
+      - dependency-name: "com.zaxxer:HikariCP"
+        update-types: ["version-update:semver-major"]
+      # SnakeYAML has breaking changes with 2.0
+      - dependency-name: "org.yaml:snakeyaml"
+        update-types: ["version-update:semver-major"]

.github/pull_request_template.md

@@ -0,0 +1,11 @@
+[//]: # (Lines in this format are considered as comments and will not be displayed.)
+
+[//]: # (If your work is in progress, please consider making a draft pull request.)
+
+### Summary of your change
+
+[//]: # (Example: motivation, enhancement)
+
+### Related issue
+
+[//]: # (Reference it using '#NUMBER'. Ex: Fixes/Related #...)

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,65 @@
+# GitHub automatic code security scanning using CodeQL
+
+# Human-readable name in the actions tab
+name: "CodeQL"
+
+on:
+  workflow_run:
+    workflows: ["Maven Build"]
+    branches: [main]
+    types:
+      - completed
+
+jobs:
+  # job i
+  analyze:
+
+    # Display name
+    name: Analyze
+
+    # Environment
+    runs-on: ubuntu-latest
+
+    timeout-minutes: ${{ (matrix.language == 'swift' && 120) || 360 }}
+
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: true
+      matrix:
+        # Languages to scan
+        language: [ 'java' ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+
+      # Setup Java
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version-file: '.java-version'
+          cache: 'maven'
+
+      # Manually start the autobuild process, because autobuild always selects Java 8 as build toolchain, but
+      # we are doing cross-crompiling from a newer Java version
+      - name: Build with Maven
+        # Extracted from autobuild
+        run: mvn package -f "pom.xml" --batch-mode -V -e -Dfindbugs.skip -Dcheckstyle.skip -Dpmd.skip=true -Dspotbugs.skip -Denforcer.skip -Dmaven.javadoc.skip -DskipTests -Dmaven.test.skip.exec -Dlicense.skip=true -Drat.skip=true -Dspotless.check.skip=true -t /home/runner/.m2/toolchains.xml
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{matrix.language}}"

.github/workflows/maven.yml

@@ -0,0 +1,47 @@
+# Automatically build, run unit and integration tests to detect errors early (CI provided by GitHub)
+# including making pull requests review easier
+
+# Human-readable name in the actions tab
+name: Maven Build
+
+# Build on every pull request regardless of the branch
+# Wiki: https://help.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  # job id
+  build_and_test:
+
+    # Environment image - always use the newest OS
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    # Run steps
+    steps:
+      # Pull changes
+      - uses: actions/checkout@v4
+
+      # Setup Java
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version-file: '.java-version'
+          cache: 'maven'
+
+      # Build and test (included in package)
+      - name: Build with Maven and test
+        # Run non-interactive, package (with compile+test),
+        # ignore snapshot updates, because they are likely to have breaking changes, enforce checksums
+        run: mvn test --batch-mode --threads 2.0C --no-snapshot-updates --strict-checksums --file pom.xml
+
+      - name: Update dependency graph
+        if: ${{ github.event_name == 'push' }}
+        uses: advanced-security/maven-dependency-submission-action@v4.0.0

.gitignore

@@ -1,8 +1,49 @@
+# Eclipse
+.classpath
+.project
+.settings/
+
+# NetBeans
+nbproject/
+nb-configuration.xml
+
+# IntelliJ
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# VSCode
+.vscode/
+
+# Maven
 target/
-pom.xml.tag
-pom.xml.releaseBackup
 pom.xml.versionsBackup
-pom.xml.next
-release.properties
-dependency-reduced-pom.xml
-buildNumber.properties
+
+# Gradle
+.gradle
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# various other potential build files
+build/
+bin/
+dist/
+manifest.mf
+*.log
+
+# Vim
+.*.sw[a-p]
+
+# virtual machine crash logs, see https://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# Mac filesystem dust
+.DS_Store
+
+# Factorypath from Visual Studio Code
+.factorypath

.java-version

@@ -0,0 +1,2 @@
+# Latest GitHub Action java release that is installed on the runners
+21

CHANGELOG.md

@@ -0,0 +1,260 @@
+### 1.11
+
+* TODO: Replace reflection with methodhandles
+
+* Use direct proxies instead of ssl factories for multiple IP-addresses
+* Remove local address check for multiple IP-addresses
+* Fix parsing of local IP-addresses
+* Fix address rotating for contacting the Mojang API
+* Optimize issue template
+* Use Instant for timestamps
+* Migrate SLF4J logging (Fixes #177)
+* Use Gson's TypeAdapter for more type safety
+* Add support for IPv6 proxies
+* Shared configuration implementation for easier maintained code
+* Use Gson for json parsing, because it's supported on all platforms and removes code duplicates
+* Clean up project code
+* Drop support for deprecated AuthMe API
+* Remove legacy database migration code
+* Drop support for RoyalAuth, because it doesn't seem to be supported anymore
+* Clean up client-server encryption -> use only one cipher per connection, simplify code
+
+### 1.10
+
+* Prevent authentication proxies
+* Drop database importer
+* More logging by default
+* Add support for HTTP proxies
+* Set the fake offline UUID on lowest priority (-> as soon as possible)
+* Remove bungee chatcolor for Bukkit to support KCauldron
+* Minor cleanup using inspections + Https
+* Increase hook delay to let ProtocolLib inject the listener
+* Drop support for old AuthMe API + Add support for new AuthMe API
+* Remove eBean util usage to make it compatible with 1.12
+* Do not try to hook into a plugin if auth plugin hook is already set using the FastLogin API
+* Automatically register accounts if they are not in the auth plugin database but in the FastLogin database
+* Update BungeeAuth dependency and use the new API. Please update your plugin if you still use the old one.
+* Remove deprecated API methods from the last version
+* Finally, update the IP column on every login
+* No duplicate session login
+* Fix timestamp parsing in newer versions of SQLite
+* Fix Spigot console command invocation sends result to in game players
+
+### 1.9
+
+* Added second attempt login -> cracked login
+* Added cracked whitelist (switch-mode -> switching to online-mode from offlinemode)
+* Added configuration to disable auto logins for 2Factor authentication
+* Added missing add-premium-other message
+* Upgrade to Java 8 -> Minimize file size
+* Refactored/Cleaned up a lot of code
+* [API] Deprecated platform specific auth-plugin. Please use AuthPlugin< platform specific player type >
+* [API] Deprecated bukkit's password generator. Please use PasswordGenerator< platform specific player type >
+* Fix ProtocolSupport autoRegister
+* Fix update username in FastLogin database after nameChange
+* Fix logging exceptions on encryption enabling
+* Fix compatibility with older ProtocolLib versions (for 1.7) because of the missing getMethodAcccessorOrNull method
+* Fix correct cracked permission for bukkit
+* A try to fix SQLite timestamp parsing
+* Drop support for LoginSecurity 1.X since 2.X seems to be stable
+* Remove the nasty UltraAuth fakeplayer workaround by using a new api method. You should UltraAuth if you have it
+
+### 1.8
+
+* Added autoIn importer
+* Added BFA importer
+* Added ElDziAuth importer
+* Fix third-party not premium player detection
+* Fix ProtocolSupport BungeeCord
+* Fix duplicate logins for BungeeAuth users
+
+### 1.7.1
+
+* Fix BungeeCord autoRegister (Fixes #46)
+* Fix ProtocolSupport auto-register
+
+### 1.7
+
+* Added support for making requests to Mojang from different IPv4 addresses
+* Added us.mcapi.com as third-party APIs to workaround rate-limits
+* Fixed NPE in BungeeCord on cracked session
+* Fixed skin applies if premium uuid is deactivated
+* Fix player entry is not saved if namechangecheck is enabled
+* Fix skin applies for third-party plugins
+* Switch to mcapi.ca for uuid lookups
+* Fix BungeeCord not setting a premium uuid
+* Fix setting skin on Cauldron
+* Fix saving on name change
+
+### 1.6.2
+
+* Fixed support for new LoginSecurity version
+
+### 1.6.1
+
+* Fix message typo in BungeeCord which created a NPE if premium-warning is activated
+
+### 1.6
+
+* Add a warning message if the user tries to invoke the premium command
+* Added missing translation if the server isn't fully started
+* Removed ProtocolLib as required dependency. You can use ProtocolSupport or BungeeCord as alternative
+* Reduce the number of worker threads from 5 to 3 in ProtocolLib
+* Process packets in ProtocolLib async/non-blocking -> better performance
+* Fixed missing translation in commands
+* Fixed cracked command not working on BungeeCord
+* Fix error if forward skins is disabled
+
+### 1.5.2
+
+* Fixed BungeeCord force logins if there is a lobby server
+* Removed cache expire in BungeeCord
+* Applies skin earlier to make it visible for other plugins listening on login events
+
+### 1.5.1
+
+* Fixed BungeeCord support by correctly saving the proxy ids
+
+### 1.5
+
+* Added localization
+* Fixed NPE on premium name check if it's pure cracked player
+* Fixed NPE in BungeeCord on cracked login for existing players
+* Fixed saving of existing cracked players
+
+### 1.4
+
+* Added Bungee setAuthPlugin method
+* Added nameChangeCheck
+* Multiple BungeeCord support
+
+### 1.3.1
+
+* Prevent thread create violation in BungeeCord
+
+### 1.3
+
+* Added support for AuthMe 3.X
+* Fixed premium logins if the server is not fully started
+* Added other command argument to /premium and /cracked
+* Added support for LogIt
+* Fixed 1.7 Minecraft support by removing guava 11+ only features -> Cauldron support
+* Fixed BungeeCord support in Cauldron
+
+### 1.2.1
+
+* Fix premium status change notification message on BungeeCord
+
+### 1.2
+
+* Fix race condition in BungeeCord
+* Fix deadlock in xAuth
+* Added API methods for plugins to set their own password generator
+* Added API methods for plugins to set their own auth plugin hook
+=> Added support for AdvancedLogin
+
+### 1.1
+
+* Make the configuration options also work under BungeeCord (premiumUUID, forwardSkin)
+* Catch configuration loading exception if it's not spigot build
+* Fix config loading for older Spigot builds
+
+### 1.0
+
+* Massive refactor to handle errors on force actions safely
+* force Methods now runs async too
+* force methods now returns a boolean to reflect if the method was successful
+* isRegistered method should now throw an exception if the plugin was unable to query the requested data
+
+### 0.8
+
+* Fixed BungeeCord support for the Bukkit module
+* Added database storage to save the premium state
+* Fix logical error on /premium (Thanks to @NorbiPeti)
+* Fixed issues with host lookup from hosts file (Thanks to @NorbiPeti)
+* Remove handshake listener because it creates errors on some systems
+
+### 0.7
+
+* Added BungeeAuth support
+* Added /premium [player] command with optional player parameter
+* Added a check if the player is already on the premium list
+* Added a forwardSkin config option
+* Added premium UUID support
+* Updated to the newest changes of Spigot
+* Removes the need of a Bukkit auth plugin if you use a bungeecord one
+* Optimize performance and thread-safety
+* Fixed BungeeCord support
+* Changed config option auto-login to auto-register to clarify the usage
+
+### 0.6
+
+* Fixed 1.9 bugs
+* Added UltraAuth support
+
+### 0.5
+
+* Added cracked command
+* Added auto-login - See config
+* Added config
+* Added isRegistered API method
+* Added forceRegister API method
+
+* Fixed CrazyLogin player data restore -> Fixes memory leaks with this plugin
+* Fixed premium name check to ProtocolSupport
+* Improved permissions management
+
+### 0.4
+
+* Added forward premium skin
+* Added plugin support for ProtocolSupport
+
+### 0.3.2
+
+* Run packet readers in a different thread (separated from the Netty I/O Thread)
+-> Improves performance
+* Fixed Plugin disable if the server is in online mode but have to be in offline mode
+
+### 0.3.1
+
+* Improved BungeeCord security
+
+### 0.3
+
+* Added BungeeCord support
+* Decrease timeout checks in order to fail faster on connection problems
+* Code style improvements
+
+### 0.2.4
+
+* Fixed NPE on invalid sessions
+* Improved security by generating a randomized serverId
+* Removed /premium [player] because it's safer for premium players who join without registration
+
+### 0.2.3
+
+* Remove useless AuthMe force-login code
+* Send a kick message to the client instead of just "Disconnect"
+* Reformat source code
+* Fix thread safety for fake start packets (Bukkit.getOfflinePlayer doesn't look like to be thread-safe)
+* Added more documentation
+
+### 0.2.2
+
+* Compile project with Java 7 :(
+
+### 0.2.1
+* A couple of security fixes (premium players cannot longer steal the account of a cracked account)
+* Added a /premium command to mark you as premium player
+
+### 0.2
+
+* Added support for CrazyLogin and LoginSecurity
+* Now minecraft version independent
+* Added debug logging
+* Code clean up
+* More state validation
+* Added better error handling
+
+### 0.1
+* First release

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 
+Copyright (c) 2015-2023 games647 and contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -19,4 +19,3 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-

README.md

@@ -1,2 +1,128 @@
 # FastLogin
-Checks if a minecraft player has a valid paid account. If so, they can skip offline authentification.
+
+Checks if a Minecraft player has a paid account (premium). If so, they can skip offline authentication (auth plugins).
+So they don't need to enter passwords. This is also called auto login (auto-login).
+
+## Features
+
+* Detect paid accounts from others
+* Automatically login paid accounts (premium)
+* Support various of auth plugins
+* Cauldron support
+* Forge/Sponge message support
+* Premium UUID support
+* Forward skins
+* Detect username changed and will update the existing database record
+* BungeeCord support
+* Auto register new premium players
+* Plugin: ProtocolSupport is supported and can be used as an alternative to ProtocolLib
+* No client modifications needed
+* Good performance by using async operations
+* Locale messages
+* Support for Bedrock players proxies through FloodGate
+
+## Issues
+
+Please use issues for bug reports, suggestions, questions and more. Please check for existing issues. Existing issues
+can be voted up by adding up vote to the original post. Closing issues means that they are marked as resolved. Comments
+are still allowed and it could be re-opened.
+
+## Development builds
+
+Development builds contain the latest changes from the Source-Code. They are bleeding edge and could introduce new bugs,
+but also include features, enhancements and bug fixes that are not yet in a released version. If you click on the left
+side on `Changes`, you can see iterative change sets leading to a specific build.
+
+You can download them from here: https://ci.codemc.org/job/Games647/job/FastLogin/
+
+***
+
+## Commands
+
+    /premium [player] Label the invoker or the argument as paid account
+    /cracked [player] Label the invoker or the argument as cracked account
+
+## Permissions
+
+    fastlogin.bukkit.command.premium
+    fastlogin.bukkit.command.cracked
+    fastlogin.command.premium.other
+    fastlogin.command.cracked.other
+
+## Placeholder
+
+This plugin supports `PlaceholderAPI` on `Spigot`. It exports the following variable
+`%fastlogin_status%`. In BungeeCord environments, the status of a player will be delivered with a delay after the player
+already successful joined the server. This takes about a couple of milliseconds. In this case the value
+will be `Unknown`.
+
+Possible values: `Premium`, `Cracked`, `Unknown`
+
+## Requirements
+
+* Java 17+ (Recommended)
+* Server software in offlinemode:
+  * Spigot (or a fork e.g. Paper) 1.8.8+
+    * Protocol plugin:
+      * [ProtocolLib 5.1+](https://www.spigotmc.org/resources/protocollib.1997/) or
+      * [ProtocolSupport](https://www.spigotmc.org/resources/protocolsupport.7201/)
+  * Latest BungeeCord (or a fork e.g. Waterfall) or Velocity
+* An auth plugin.
+
+### Supported auth plugins
+
+#### Spigot/Paper
+
+* [AdvancedLogin (Paid)](https://www.spigotmc.org/resources/advancedlogin.10510/)
+* [AuthMe (5.X)](https://dev.bukkit.org/bukkit-plugins/authme-reloaded/)
+* [CrazyLogin](https://dev.bukkit.org/bukkit-plugins/crazylogin/)
+* [LoginSecurity](https://dev.bukkit.org/bukkit-plugins/loginsecurity/)
+* [LogIt](https://github.com/games647/LogIt)
+* [UltraAuth](https://dev.bukkit.org/bukkit-plugins/ultraauth-aa/)
+* [UserLogin](https://www.spigotmc.org/resources/userlogin.80669/)
+* [xAuth](https://dev.bukkit.org/bukkit-plugins/xauth/)
+
+#### BungeeCord/Waterfall
+
+* [BungeeAuth](https://www.spigotmc.org/resources/bungeeauth.493/)
+* [BungeeAuthenticator](https://www.spigotmc.org/resources/bungeecordauthenticator.87669/)
+
+## Network requests
+
+This plugin performs network requests to:
+
+* https://api.mojang.com - retrieving uuid data to decide if we should activate premium login
+* https://sessionserver.mojang.com - verify if the player is the owner of that account
+
+***
+
+## How to install
+
+### Spigot/Paper
+
+1. Download and install ProtocolLib/ProtocolSupport
+2. Download and install FastLogin (or `FastLoginBukkit` for newer versions)
+3. Set your server in offline mode by setting the value `onlinemode` in your server.properties to false
+
+### BungeeCord/Waterfall or Velocity
+
+Install the plugin on both platforms, that is proxy (BungeeCord or Velocity) and backend server (Spigot).
+
+1. Activate proxy support in the server configuration
+   * This is often found in `spigot.yml` or `paper.yml`
+2. Restart the backend server
+3. Now there is `allowed-proxies.txt` file in the FastLogin folder of the restarted server
+    * BungeeCord: Put your `stats`-id from the BungeeCord config into this file
+    * Velocity: On plugin startup the plugin generates a `proxyId.txt` inside the plugins folder of the proxy
+4. Activate ip forwarding in your proxy config
+5. Check your database settings in the config of FastLogin on your proxy
+    * The proxies only ship with a limited set of drivers where Spigot supports more. Therefore, these are supported:
+    * BungeeCord: `com.mysql.jdbc.Driver` for MySQL/MariaDB/PostgreSQL
+    * Velocity: `fastlogin.mariadb.jdbc.Driver` for MySQL/MariaDB/PostgreSQL
+    * Note the embedded file storage SQLite is not available
+    * MySQL/MariaDB/PostgreSQL requires an external database server running. Check your server provider if there is one available
+   or install one.
+6. Set proxy and Spigot in offline mode by setting the value `onlinemode` in your `config.yml` to false
+7. You should *always* configure the firewall for your Spigot server so that it's only accessible through your proxy
+   * This is also the case without this plugin
+   * https://www.spigotmc.org/wiki/bungeecord-installation/#post-installation

bukkit/pom.xml

@@ -0,0 +1,407 @@
+<!--
+
+    SPDX-License-Identifier: MIT
+
+    The MIT License (MIT)
+
+    Copyright (c) 2015-2023 games647 and contributors
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+-->
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <properties>
+        <nettyVersion>4.1.79.Final</nettyVersion>
+    </properties>
+
+    <parent>
+        <groupId>com.github.games647</groupId>
+        <artifactId>fastlogin</artifactId>
+        <version>1.12-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <!--This has to be in lowercase because it's used by plugin.yml-->
+    <artifactId>fastlogin.bukkit</artifactId>
+    <packaging>jar</packaging>
+
+    <name>FastLoginBukkit</name>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                    <shadedArtifactAttached>false</shadedArtifactAttached>
+                    <relocations>
+                        <relocation>
+                            <pattern>org.yaml.snakeyaml</pattern>
+                            <shadedPattern>fastlogin.yaml</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>com.zaxxer.hikari</pattern>
+                            <shadedPattern>fastlogin.hikari</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>org.slf4j</pattern>
+                            <shadedPattern>fastlogin.slf4j</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>net.md_5.bungee.config</pattern>
+                            <shadedPattern>fastlogin.config</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>com.google.gson</pattern>
+                            <shadedPattern>fastlogin.gson</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>com.google.common</pattern>
+                            <shadedPattern>fastlogin.guava</shadedPattern>
+                            <excludes>
+                                <exclude>com.google.common.collect.Multimap</exclude>
+                            </excludes>
+                        </relocation>
+                        <relocation>
+                            <pattern>io.papermc.lib</pattern>
+                            <shadedPattern>fastlogin.paperlib</shadedPattern>
+                        </relocation>
+                    </relocations>
+                    <!-- Rename the service file too to let SLF4J api find our own relocated jdk logger -->
+                    <!-- Located in META-INF/services -->
+                    <transformers>
+                        <transformer
+                                implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                    </transformers>
+                    <minimizeJar>true</minimizeJar>
+                    <filters>
+                        <filter>
+                            <artifact>*:*</artifact>
+                            <excludes>
+                                <exclude>META-INF/MANIFEST.MF</exclude>
+                                <exclude>**/module-info.class</exclude>
+                            </excludes>
+                        </filter>
+                    </filters>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <!-- PaperSpigot API and PaperLib -->
+        <repository>
+            <id>papermc</id>
+            <url>https://papermc.io/repo/repository/maven-public/</url>
+        </repository>
+
+        <!-- ProtocolLib -->
+        <repository>
+            <id>dmulloy2-repo</id>
+            <url>https://repo.dmulloy2.net/repository/public/</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+
+        <!-- AuthMe Reloaded, xAuth and LoginSecurity -->
+        <repository>
+            <id>codemc-releases</id>
+            <url>https://repo.codemc.io/repository/maven-public/</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+
+        <!-- PlaceholderAPI -->
+        <repository>
+            <id>placeholderapi</id>
+            <url>https://repo.extendedclip.com/content/repositories/placeholderapi</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+
+        <!-- GitHub automatic maven builds -->
+        <repository>
+            <id>jitpack.io</id>
+            <url>https://jitpack.io</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <!--Common plugin component-->
+        <dependency>
+            <groupId>com.github.games647</groupId>
+            <artifactId>fastlogin.core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>1.33</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <!-- PaperSpigot API for correcting user cache usage -->
+        <dependency>
+            <groupId>io.papermc.paper</groupId>
+            <artifactId>paper-api</artifactId>
+            <version>1.19-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+            <!-- Use our own newer api version -->
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>com.mojang</groupId>
+            <artifactId>datafixerupper</artifactId>
+            <version>5.0.28</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Library for listening and sending Minecraft packets-->
+        <dependency>
+            <groupId>com.comphenix.protocol</groupId>
+            <artifactId>ProtocolLib</artifactId>
+            <version>5.1.0</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Changing onlinemode on login process-->
+        <dependency>
+            <groupId>com.github.ProtocolSupport</groupId>
+            <artifactId>ProtocolSupport</artifactId>
+            <!--4.29.dev after commit about API improvements-->
+            <version>master-66b494a8dd-1</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Floodgate for Xbox Live Authentication-->
+        <dependency>
+            <groupId>org.geysermc.floodgate</groupId>
+            <artifactId>api</artifactId>
+            <version>${floodgate.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- Bedrock player bridge -->
+        <dependency>
+            <groupId>org.geysermc.geyser</groupId>
+            <artifactId>core</artifactId>
+            <version>${geyser.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- We need the API, but it was excluded above -->
+        <dependency>
+            <groupId>org.geysermc.geyser</groupId>
+            <artifactId>api</artifactId>
+            <version>${geyser.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Provide premium placeholders-->
+        <dependency>
+            <groupId>me.clip</groupId>
+            <artifactId>placeholderapi</artifactId>
+            <version>2.11.5</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Login Plugins-->
+        <dependency>
+            <groupId>fr.xephi</groupId>
+            <artifactId>authme</artifactId>
+            <version>5.6.0-beta2</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>com.lenis0012.bukkit</groupId>
+            <artifactId>loginsecurity</artifactId>
+            <version>3.3.0</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>com.github.games647</groupId>
+            <artifactId>LogIt</artifactId>
+            <version>9e3581db27</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>de.luricos.bukkit</groupId>
+            <artifactId>xAuth</artifactId>
+            <version>2.6</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+            <!--These artifacts produce conflicts on downloading-->
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--No maven repository :(-->
+        <dependency>
+            <groupId>de.st_ddt.crazy</groupId>
+            <artifactId>CrazyCore</artifactId>
+            <version>10.7.7</version>
+            <optional>true</optional>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/lib/CrazyCore v10.7.7.jar</systemPath>
+        </dependency>
+
+        <dependency>
+            <groupId>de.st_ddt.crazy</groupId>
+            <artifactId>CrazyLogin</artifactId>
+            <version>7.23</version>
+            <optional>true</optional>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/lib/CrazyLogin v7.23.2.jar</systemPath>
+        </dependency>
+
+        <dependency>
+            <groupId>ultraauth</groupId>
+            <artifactId>ultraauth</artifactId>
+            <version>2.0.2</version>
+            <optional>true</optional>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/lib/UltraAuth v2.1.2.jar</systemPath>
+        </dependency>
+
+        <dependency>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcprov-jdk18on</artifactId>
+            <version>1.77</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-transport</artifactId>
+            <version>${nettyVersion}</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-codec</artifactId>
+            <version>${nettyVersion}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- Provided by the spigot, required for testing ProtocolLib -->
+        <dependency>
+            <groupId>commons-lang</groupId>
+            <artifactId>commons-lang</artifactId>
+            <version>2.6</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BukkitLoginSession.java

@@ -0,0 +1,124 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import com.github.games647.craftapi.model.skin.SkinProperty;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Optional;
+
+/**
+ * Represents a client connecting to the server.
+ * <p>
+ * This session is invalid if the player disconnects or the login was successful
+ */
+public class BukkitLoginSession extends LoginSession {
+
+    private static final byte[] EMPTY_ARRAY = {};
+
+    private final byte[] verifyToken;
+
+    private final ClientPublicKey clientPublicKey;
+
+    private boolean verified;
+
+    private SkinProperty skinProperty;
+
+    public BukkitLoginSession(String username, byte[] verifyToken, ClientPublicKey publicKey, boolean registered,
+                              StoredProfile profile) {
+        super(username, registered, profile);
+
+        this.clientPublicKey = publicKey;
+        this.verifyToken = verifyToken.clone();
+    }
+
+    //available for BungeeCord
+    public BukkitLoginSession(String username, boolean registered) {
+        this(username, EMPTY_ARRAY, null, registered, null);
+    }
+
+    //cracked player
+    public BukkitLoginSession(String username, StoredProfile profile) {
+        this(username, EMPTY_ARRAY, null, false, profile);
+    }
+
+    //ProtocolSupport
+    public BukkitLoginSession(String username, boolean registered, StoredProfile profile) {
+        this(username, EMPTY_ARRAY, null, registered, profile);
+    }
+
+    /**
+     * Gets the verify-token the server sent to the client.
+     * <p>
+     * Empty if it's a BungeeCord connection
+     *
+     * @return verify token from the server
+     */
+    public synchronized byte[] getVerifyToken() {
+        return verifyToken.clone();
+    }
+
+    @Nullable
+    public ClientPublicKey getClientPublicKey() {
+        return clientPublicKey;
+    }
+
+    /**
+     * @return premium skin if available
+     */
+    public synchronized Optional<SkinProperty> getSkin() {
+        return Optional.ofNullable(skinProperty);
+    }
+
+    /**
+     * Sets the premium skin property which was retrieved by the session server
+     * @param skinProperty premium skin
+     */
+    public synchronized void setSkinProperty(SkinProperty skinProperty) {
+        this.skinProperty = skinProperty;
+    }
+
+    /**
+     * Sets whether the player has a premium (paid account) account and valid session
+     *
+     * @param verified whether the player has valid session
+     */
+    public synchronized void setVerified(boolean verified) {
+        this.verified = verified;
+    }
+
+    /**
+     * Get whether the player has a premium (paid account) account and valid session
+     *
+     * @return whether the player has a valid session
+     */
+    public synchronized boolean isVerified() {
+        return verified;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BukkitScheduler.java

@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import com.github.games647.fastlogin.core.AsyncScheduler;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import org.slf4j.Logger;
+
+import java.util.concurrent.Executor;
+
+public class BukkitScheduler extends AsyncScheduler {
+
+    private final Executor syncExecutor;
+
+    public BukkitScheduler(Plugin plugin, Logger logger) {
+        super(logger, command -> Bukkit.getScheduler().runTaskAsynchronously(plugin, command));
+
+        syncExecutor = task -> Bukkit.getScheduler().runTask(plugin, task);
+    }
+
+    public Executor getSyncExecutor() {
+        return syncExecutor;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BungeeManager.java

@@ -0,0 +1,236 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import com.github.games647.fastlogin.bukkit.listener.BungeeListener;
+import com.github.games647.fastlogin.core.message.ChannelMessage;
+import com.github.games647.fastlogin.core.message.LoginActionMessage;
+import com.github.games647.fastlogin.core.message.NamespaceKey;
+import com.google.common.io.ByteArrayDataOutput;
+import com.google.common.io.ByteStreams;
+import org.bukkit.Bukkit;
+import org.bukkit.Server;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.messaging.PluginMessageRecipient;
+
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+import java.util.stream.Stream;
+
+import static com.github.games647.fastlogin.core.message.ChangePremiumMessage.CHANGE_CHANNEL;
+import static com.github.games647.fastlogin.core.message.SuccessMessage.SUCCESS_CHANNEL;
+import static java.util.stream.Collectors.toSet;
+
+public class BungeeManager {
+
+    private static final String LEGACY_FILE_NAME = "proxy-whitelist.txt";
+    private static final String FILE_NAME = "allowed-proxies.txt";
+
+    //null if proxies allowed list is empty so bungeecord support is disabled
+    private Set<UUID> proxyIds;
+
+    private final FastLoginBukkit plugin;
+    private boolean enabled;
+
+    private final Collection<UUID> firedJoinEvents = new HashSet<>();
+
+    public BungeeManager(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    public void cleanup() {
+        //remove old blocked status
+        Bukkit.getOnlinePlayers().forEach(player -> player.removeMetadata(plugin.getName(), plugin));
+    }
+
+    public void sendPluginMessage(PluginMessageRecipient player, ChannelMessage message) {
+        if (player != null) {
+            ByteArrayDataOutput dataOutput = ByteStreams.newDataOutput();
+            message.writeTo(dataOutput);
+
+            NamespaceKey channel = new NamespaceKey(plugin.getName(), message.getChannelName());
+            player.sendPluginMessage(plugin, channel.getCombinedName(), dataOutput.toByteArray());
+        }
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    public void initialize() {
+        enabled = detectProxy();
+
+        if (enabled) {
+            proxyIds = loadBungeeCordIds();
+            if (proxyIds.isEmpty()) {
+                plugin.getLog().info("No valid IDs found. Minecraft proxy support cannot work in the current state");
+            }
+
+            registerPluginChannels();
+            plugin.getLog().info("Found enabled proxy configuration");
+            plugin.getLog().info("Remember to follow the proxy guide to complete your setup");
+        } else {
+            plugin.getLog().warn("Disabling Minecraft proxy configuration. Assuming direct connections from now on.");
+        }
+    }
+
+    private boolean isProxySupported(String className, String fieldName)
+        throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException {
+        return Class.forName(className).getDeclaredField(fieldName).getBoolean(null);
+    }
+
+    private boolean isVelocityEnabled()
+        throws NoSuchFieldException, IllegalArgumentException, IllegalAccessException, ClassNotFoundException,
+        NoSuchMethodException, InvocationTargetException {
+        try {
+            Class<?> globalConfig = Class.forName("io.papermc.paper.configuration.GlobalConfiguration");
+            Object global = globalConfig.getDeclaredMethod("get").invoke(null);
+            Object proxiesConfiguration = global.getClass().getDeclaredField("proxies").get(global);
+
+            Field velocitySectionField = proxiesConfiguration.getClass().getDeclaredField("velocity");
+            Object velocityConfig = velocitySectionField.get(proxiesConfiguration);
+
+            return velocityConfig.getClass().getDeclaredField("enabled").getBoolean(velocityConfig);
+        } catch (ClassNotFoundException classNotFoundException) {
+            // try again using the older Paper configuration, because the old class file still exists in newer versions
+            if (isProxySupported("com.destroystokyo.paper.PaperConfig", "velocitySupport")) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private boolean detectProxy() {
+        try {
+            if (isProxySupported("org.spigotmc.SpigotConfig", "bungee")) {
+                return true;
+            }
+        } catch (ClassNotFoundException classNotFoundException) {
+            // leave stacktrace for class not found out
+            plugin.getLog().warn("Cannot check for BungeeCord support: {}", classNotFoundException.getMessage());
+        } catch (NoSuchFieldException | IllegalAccessException ex) {
+            plugin.getLog().warn("Cannot check for BungeeCord support", ex);
+        }
+
+        try {
+            return isVelocityEnabled();
+        } catch (ClassNotFoundException classNotFoundException) {
+            plugin.getLog().warn("Cannot check for Velocity support in Paper: {}", classNotFoundException.getMessage());
+        } catch (NoSuchFieldException | IllegalAccessException | NoSuchMethodException | InvocationTargetException ex) {
+            plugin.getLog().warn("Cannot check for Velocity support in Paper", ex);
+        }
+
+        return false;
+    }
+
+    private void registerPluginChannels() {
+        Server server = Bukkit.getServer();
+
+        // check for incoming messages from the bungeecord version of this plugin
+        String groupId = plugin.getName();
+        String forceChannel = NamespaceKey.getCombined(groupId, LoginActionMessage.FORCE_CHANNEL);
+        server.getMessenger().registerIncomingPluginChannel(plugin, forceChannel, new BungeeListener(plugin));
+
+        // outgoing
+        String successChannel = new NamespaceKey(groupId, SUCCESS_CHANNEL).getCombinedName();
+        String changeChannel = new NamespaceKey(groupId, CHANGE_CHANNEL).getCombinedName();
+        server.getMessenger().registerOutgoingPluginChannel(plugin, successChannel);
+        server.getMessenger().registerOutgoingPluginChannel(plugin, changeChannel);
+    }
+
+    private Set<UUID> loadBungeeCordIds() {
+        Path proxiesFile = plugin.getPluginFolder().resolve(FILE_NAME);
+        Path legacyFile = plugin.getPluginFolder().resolve(LEGACY_FILE_NAME);
+        try {
+            if (Files.notExists(proxiesFile)) {
+                if (Files.exists(legacyFile)) {
+                    Files.move(legacyFile, proxiesFile);
+                }
+
+                if (Files.notExists(legacyFile)) {
+                    Files.createFile(proxiesFile);
+                }
+            }
+
+            Files.deleteIfExists(legacyFile);
+            try (Stream<String> lines = Files.lines(proxiesFile)) {
+                return lines.map(String::trim).map(UUID::fromString).collect(toSet());
+            }
+        } catch (IOException ex) {
+            plugin.getLog().error("Failed to read proxies", ex);
+        } catch (Exception ex) {
+            plugin.getLog().error("Failed to retrieve proxy Id. Disabling BungeeCord support", ex);
+        }
+
+        return Collections.emptySet();
+    }
+
+    public boolean isProxyAllowed(UUID proxyId) {
+        return proxyIds != null && proxyIds.contains(proxyId);
+    }
+
+    /**
+     * Mark the event to be fired including the task delay.
+     *
+     * @param player joining player
+     */
+    public synchronized void markJoinEventFired(Player player) {
+        firedJoinEvents.add(player.getUniqueId());
+    }
+
+    /**
+     * Check if the event fired including with the task delay. This necessary to restore the order of processing the
+     * BungeeCord messages after the PlayerJoinEvent fires including the delay.
+     * <p>
+     * If the join event fired, the delay exceeded, but it ran earlier and couldn't find the recently started login
+     * session. If not fired, we can start a new force login task. This will still match the requirement that we wait
+     * a certain time after the player join event fired.
+     *
+     * @param player joining player
+     * @return event fired including delay
+     */
+    public synchronized boolean didJoinEventFired(Player player) {
+        return firedJoinEvents.contains(player.getUniqueId());
+    }
+
+    /**
+     * Player quit clean up
+     *
+     * @param player joining player
+     */
+    public synchronized void cleanup(Player player) {
+        firedJoinEvents.remove(player.getUniqueId());
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/FastLoginBukkit.java

@@ -0,0 +1,334 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import com.comphenix.protocol.ProtocolLibrary;
+import com.github.games647.fastlogin.bukkit.command.CrackedCommand;
+import com.github.games647.fastlogin.bukkit.command.PremiumCommand;
+import com.github.games647.fastlogin.bukkit.listener.ConnectionListener;
+import com.github.games647.fastlogin.bukkit.listener.PaperCacheListener;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.ProtocolLibListener;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.SkinApplyListener;
+import com.github.games647.fastlogin.bukkit.listener.protocolsupport.ProtocolSupportListener;
+import com.github.games647.fastlogin.bukkit.task.DelayedAuthHook;
+import com.github.games647.fastlogin.core.CommonUtil;
+import com.github.games647.fastlogin.core.PremiumStatus;
+import com.github.games647.fastlogin.core.hooks.bedrock.BedrockService;
+import com.github.games647.fastlogin.core.hooks.bedrock.FloodgateService;
+import com.github.games647.fastlogin.core.hooks.bedrock.GeyserService;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.PlatformPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.PluginManager;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.geysermc.floodgate.api.FloodgateApi;
+import org.geysermc.geyser.GeyserImpl;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+
+import java.net.InetSocketAddress;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+/**
+ * This plugin checks if a player has a paid account and if so tries to skip offline mode authentication.
+ */
+public class FastLoginBukkit extends JavaPlugin implements PlatformPlugin<CommandSender> {
+
+    //1 minutes should be enough as a timeout for bad internet connection (Server, Client and Mojang)
+    private final ConcurrentMap<String, BukkitLoginSession> loginSession = CommonUtil.buildCache(1, -1);
+    private final Map<UUID, PremiumStatus> premiumPlayers = new ConcurrentHashMap<>();
+    private final Logger logger;
+
+    private boolean serverStarted;
+    private BungeeManager bungeeManager;
+    private final BukkitScheduler scheduler;
+    private FastLoginCore<Player, CommandSender, FastLoginBukkit> core;
+    private FloodgateService floodgateService;
+    private GeyserService geyserService;
+
+    private PremiumPlaceholder premiumPlaceholder;
+
+    public FastLoginBukkit() {
+        this.logger = CommonUtil.initializeLoggerService(getLogger());
+        this.scheduler = new BukkitScheduler(this, logger);
+    }
+
+    @Override
+    public void onEnable() {
+        core = new FastLoginCore<>(this);
+        core.load();
+
+        if (getServer().getOnlineMode()) {
+            //we need to require offline to prevent a loginSession request for an offline player
+            logger.error("Server has to be in offline mode");
+            setEnabled(false);
+            return;
+        }
+
+        if (!initializeFloodgate()) {
+            setEnabled(false);
+        }
+
+        bungeeManager = new BungeeManager(this);
+        bungeeManager.initialize();
+
+        PluginManager pluginManager = getServer().getPluginManager();
+        if (bungeeManager.isEnabled()) {
+            markInitialized();
+        } else {
+            if (!core.setupDatabase()) {
+                setEnabled(false);
+                return;
+            }
+
+            if (pluginManager.isPluginEnabled("ProtocolSupport")) {
+                pluginManager.registerEvents(new ProtocolSupportListener(this, core.getAntiBot()), this);
+            } else if (pluginManager.isPluginEnabled("ProtocolLib")) {
+                ProtocolLibListener.register(this, core.getAntiBot(), core.getConfig().getBoolean("verifyClientKeys"));
+
+                //if server is using paper - we need to set the skin at pre login anyway, so no need for this listener
+                if (!isPaper() && getConfig().getBoolean("forwardSkin")) {
+                    pluginManager.registerEvents(new SkinApplyListener(this), this);
+                }
+            } else {
+                logger.warn("Either ProtocolLib or ProtocolSupport have to be installed if you don't use BungeeCord");
+                setEnabled(false);
+                return;
+            }
+        }
+
+        //delay dependency setup because we load the plugin very early where plugins are initialized yet
+        getServer().getScheduler().runTaskLater(this, new DelayedAuthHook(this), 5L);
+
+        pluginManager.registerEvents(new ConnectionListener(this), this);
+
+        //if server is using paper - we need to add one more listener to correct the user cache usage
+        if (isPaper()) {
+            pluginManager.registerEvents(new PaperCacheListener(this), this);
+        }
+
+        //register commands using a unique name
+        Optional.ofNullable(getCommand("premium")).ifPresent(c -> c.setExecutor(new PremiumCommand(this)));
+        Optional.ofNullable(getCommand("cracked")).ifPresent(c -> c.setExecutor(new CrackedCommand(this)));
+
+        if (pluginManager.isPluginEnabled("PlaceholderAPI")) {
+            premiumPlaceholder = new PremiumPlaceholder(this);
+            premiumPlaceholder.register();
+        }
+    }
+
+    private boolean initializeFloodgate() {
+        if (getServer().getPluginManager().getPlugin("Geyser-Spigot") != null) {
+            geyserService = new GeyserService(GeyserImpl.getInstance(), core);
+        }
+
+        if (getServer().getPluginManager().getPlugin("floodgate") != null) {
+            floodgateService = new FloodgateService(FloodgateApi.getInstance(), core);
+
+            // Check Floodgate config values and return
+            return floodgateService.isValidFloodgateConfigString("autoLoginFloodgate")
+                    && floodgateService.isValidFloodgateConfigString("allowFloodgateNameConflict");
+        }
+
+        return true;
+    }
+
+    @Override
+    public void onDisable() {
+        loginSession.clear();
+        premiumPlayers.clear();
+
+        if (core != null) {
+            core.close();
+        }
+
+        if (bungeeManager != null) {
+            bungeeManager.cleanup();
+        }
+
+        if (premiumPlaceholder != null && getServer().getPluginManager().isPluginEnabled("PlaceholderAPI")) {
+            try {
+                premiumPlaceholder.unregister();
+            } catch (Exception | NoSuchMethodError exception) {
+                logger.error("Failed to unregister placeholder", exception);
+            }
+        }
+
+        if (getServer().getPluginManager().isPluginEnabled("ProtocolLib")) {
+            ProtocolLibrary.getProtocolManager().getAsynchronousManager().unregisterAsyncHandlers(this);
+        }
+    }
+
+    public FastLoginCore<Player, CommandSender, FastLoginBukkit> getCore() {
+        return core;
+    }
+
+    /**
+     * Gets a thread-safe map about players which are connecting to the server are being checked to be premium (paid
+     * account)
+     *
+     * @return a thread-safe loginSession map
+     */
+    public ConcurrentMap<String, BukkitLoginSession> getLoginSessions() {
+        return loginSession;
+    }
+
+    public BukkitLoginSession getSession(InetSocketAddress address) {
+        String id = getSessionId(address);
+        return loginSession.get(id);
+    }
+
+    public String getSessionId(InetSocketAddress address) {
+        return address.getAddress().getHostAddress() + ':' + address.getPort();
+    }
+
+    public void putSession(InetSocketAddress address, BukkitLoginSession session) {
+        String id = getSessionId(address);
+        loginSession.put(id, session);
+    }
+
+    public void removeSession(InetSocketAddress address) {
+        String id = getSessionId(address);
+        loginSession.remove(id);
+    }
+
+    public Map<UUID, PremiumStatus> getPremiumPlayers() {
+        return premiumPlayers;
+    }
+
+    /**
+     * Fetches the premium status of an online player.
+     * {@snippet :
+     * // Bukkit's players object after successful authentication i.e. PlayerJoinEvent
+     * // except for proxies like BungeeCord and Velocity where the details are sent delayed (1-2 seconds)
+     * Player player;
+     * PremiumStatus status = JavaPlugin.getPlugin(FastLoginBukkit.class).getStatus(player.getUniqueId());
+     * switch (status) {
+     *     case CRACKED:
+     *         // player is offline
+     *         break;
+     *     case PREMIUM:
+     *         // account is premium and player passed the verification
+     *         break;
+     *     case UNKNOWN:
+     *         // no record about this player
+     * }
+     * }
+     *
+     * @param onlinePlayer player that is currently online player (play state)
+     * @return the online status or unknown if an error happened, the player isn't online or BungeeCord doesn't send
+     * us the status message yet (This means you cannot check the login status on the PlayerJoinEvent).
+     */
+    public @NotNull PremiumStatus getStatus(@NotNull UUID onlinePlayer) {
+        return premiumPlayers.getOrDefault(onlinePlayer, PremiumStatus.UNKNOWN);
+    }
+
+    /**
+     * Wait before the server is fully started. This is workaround, because connections right on startup are not
+     * injected by ProtocolLib
+     *
+     * @return true if ProtocolLib can now intercept packets
+     */
+    public boolean isServerFullyStarted() {
+        return serverStarted;
+    }
+
+    public void markInitialized() {
+        this.serverStarted = true;
+    }
+
+    public BungeeManager getBungeeManager() {
+        return bungeeManager;
+    }
+
+    @Override
+    public Path getPluginFolder() {
+        return getDataFolder().toPath();
+    }
+
+    @Override
+    public Logger getLog() {
+        return logger;
+    }
+
+    @Override
+    public BukkitScheduler getScheduler() {
+        return scheduler;
+    }
+
+    @Override
+    public void sendMessage(CommandSender receiver, String message) {
+        receiver.sendMessage(message);
+    }
+
+    /**
+     * Checks if a plugin is installed on the server
+     *
+     * @param name the name of the plugin
+     * @return true if the plugin is installed
+     */
+    @Override
+    public boolean isPluginInstalled(String name) {
+        // the plugin may be enabled after FastLogin, so isPluginEnabled() won't work here
+        return Bukkit.getServer().getPluginManager().getPlugin(name) != null;
+    }
+
+    public FloodgateService getFloodgateService() {
+        return floodgateService;
+    }
+
+    public GeyserService getGeyserService() {
+        return geyserService;
+    }
+
+    @Override
+    public BedrockService<?> getBedrockService() {
+        if (floodgateService != null) {
+            return floodgateService;
+        }
+        return geyserService;
+    }
+
+    private boolean isPaper() {
+        return isClassAvailable("com.destroystokyo.paper.PaperConfig").isPresent()
+                || isClassAvailable("io.papermc.paper.configuration.Configuration").isPresent();
+    }
+
+    private Optional<Class<?>> isClassAvailable(String clazzName) {
+        try {
+            return Optional.of(Class.forName(clazzName));
+        } catch (ClassNotFoundException e) {
+            return Optional.empty();
+        }
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/InetUtils.java

@@ -0,0 +1,63 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import java.net.InetAddress;
+
+public final class InetUtils {
+
+    private InetUtils() {
+        // Utility
+    }
+
+    /**
+     * Verifies if the given IP address is from the local network
+     *
+     * @param address IP address
+     * @return true if address is from local network or even from the device itself (loopback)
+     */
+    public static boolean isLocalAddress(InetAddress address) {
+        // Loopback addresses like 127.0.* (IPv4) or [::1] (IPv6)
+        return address.isLoopbackAddress()
+                // Example: 10.0.0.0, 172.16.0.0, 192.168.0.0, fec0::/10 (deprecated)
+                // Ref: https://en.wikipedia.org/wiki/IP_address#Private_addresses
+                || address.isSiteLocalAddress()
+                // Example: 169.254.0.0/16, fe80::/10
+                // Ref: https://en.wikipedia.org/wiki/IP_address#Address_autoconfiguration
+                || address.isLinkLocalAddress()
+                // non deprecated unique site-local that java doesn't check yet -> fc00::/7
+                || isIPv6UniqueSiteLocal(address);
+    }
+
+    private static boolean isIPv6UniqueSiteLocal(InetAddress address) {
+        // ref: https://en.wikipedia.org/wiki/Unique_local_address
+
+        // currently undefined but could be used in the near future fc00::/8
+        return (address.getAddress()[0] & 0xFF) == 0xFC
+                // in use for unique site-local fd00::/8
+                || (address.getAddress()[0] & 0xFF) == 0xFD;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/PremiumPlaceholder.java

@@ -0,0 +1,84 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collections;
+import java.util.List;
+
+public class PremiumPlaceholder extends PlaceholderExpansion {
+
+    private static final String PLACEHOLDER_VARIABLE = "status";
+
+    private final FastLoginBukkit plugin;
+
+    public PremiumPlaceholder(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean persist() {
+        return true;
+    }
+
+    @Override
+    public @NotNull List<String> getPlaceholders() {
+        return Collections.singletonList(PLACEHOLDER_VARIABLE);
+    }
+
+    @Override
+    public String onRequest(OfflinePlayer player, @NotNull String identifier) {
+        // player is null if offline
+        if (player != null && PLACEHOLDER_VARIABLE.equals(identifier)) {
+            return plugin.getStatus(player.getUniqueId()).getReadableName();
+        }
+
+        return null;
+    }
+
+    @Override
+    public @NotNull String getIdentifier() {
+        return plugin.getName();
+    }
+
+    @Override
+    public String getRequiredPlugin() {
+        return plugin.getName();
+    }
+
+    @Override
+    public @NotNull String getAuthor() {
+        return String.join(", ", plugin.getDescription().getAuthors());
+    }
+
+    @Override
+    public @NotNull String getVersion() {
+        return plugin.getDescription().getVersion();
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/command/CrackedCommand.java

@@ -0,0 +1,115 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.command;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.event.BukkitFastLoginPremiumToggleEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import static com.github.games647.fastlogin.core.shared.event.FastLoginPremiumToggleEvent.PremiumToggleReason;
+
+public class CrackedCommand extends ToggleCommand {
+
+    public CrackedCommand(FastLoginBukkit plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             String[] args) {
+        if (args.length == 0) {
+            onCrackedSelf(sender);
+        } else {
+            onCrackedOther(sender, command, args);
+        }
+
+        return true;
+    }
+
+    private void onCrackedSelf(CommandSender sender) {
+        if (isConsole(sender)) {
+            return;
+        }
+
+        if (forwardCrackedCommand(sender, sender.getName())) {
+            return;
+        }
+
+        // todo: load async if
+        StoredProfile profile = plugin.getCore().getStorage().loadProfile(sender.getName());
+        if (profile.isPremium()) {
+            plugin.getCore().sendLocaleMessage("remove-premium", sender);
+
+            profile.setPremium(false);
+            profile.setId(null);
+            plugin.getScheduler().runAsync(() -> {
+                plugin.getCore().getStorage().save(profile);
+                plugin.getServer().getPluginManager().callEvent(
+                        new BukkitFastLoginPremiumToggleEvent(profile, PremiumToggleReason.COMMAND_OTHER));
+            });
+        } else {
+            plugin.getCore().sendLocaleMessage("not-premium", sender);
+        }
+    }
+
+    private void onCrackedOther(CommandSender sender, Command command, String[] args) {
+        if (!hasOtherPermission(sender, command)) {
+            return;
+        }
+
+        if (forwardCrackedCommand(sender, args[0])) {
+            return;
+        }
+
+        //todo: load async
+        StoredProfile profile = plugin.getCore().getStorage().loadProfile(args[0]);
+        if (profile == null) {
+            sender.sendMessage("Error occurred");
+            return;
+        }
+
+        //existing player is already cracked
+        if (profile.isSaved() && !profile.isPremium()) {
+            plugin.getCore().sendLocaleMessage("not-premium-other", sender);
+        } else {
+            plugin.getCore().sendLocaleMessage("remove-premium", sender);
+
+            profile.setPremium(false);
+            plugin.getScheduler().runAsync(() -> {
+                plugin.getCore().getStorage().save(profile);
+                plugin.getServer().getPluginManager().callEvent(
+                        new BukkitFastLoginPremiumToggleEvent(profile, PremiumToggleReason.COMMAND_OTHER));
+            });
+        }
+    }
+
+    private boolean forwardCrackedCommand(CommandSender sender, String target) {
+        return forwardBungeeCommand(sender, target, false);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/command/PremiumCommand.java

@@ -0,0 +1,130 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.command;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.event.BukkitFastLoginPremiumToggleEvent;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPremiumToggleEvent.PremiumToggleReason;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Let users activate fast login by command. This only be accessible if
+ * the user has access to its account. So we can make sure that not another
+ * person with a paid account and the same username can steal their account.
+ */
+public class PremiumCommand extends ToggleCommand {
+
+    public PremiumCommand(FastLoginBukkit plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             String[] args) {
+        if (args.length == 0) {
+            onPremiumSelf(sender);
+        } else {
+            onPremiumOther(sender, command, args);
+        }
+
+        return true;
+    }
+
+    private void onPremiumSelf(CommandSender sender) {
+        if (isConsole(sender)) {
+            return;
+        }
+
+        if (forwardPremiumCommand(sender, sender.getName())) {
+            return;
+        }
+
+        UUID id = ((Player) sender).getUniqueId();
+        if (plugin.getConfig().getBoolean("premium-warning") && !plugin.getCore().getPendingConfirms().contains(id)) {
+            sender.sendMessage(plugin.getCore().getMessage("premium-warning"));
+            plugin.getCore().getPendingConfirms().add(id);
+            return;
+        }
+
+        plugin.getCore().getPendingConfirms().remove(id);
+        //todo: load async
+        StoredProfile profile = plugin.getCore().getStorage().loadProfile(sender.getName());
+        if (profile.isPremium()) {
+            plugin.getCore().sendLocaleMessage("already-exists", sender);
+        } else {
+            //todo: resolve uuid
+            profile.setPremium(true);
+            plugin.getScheduler().runAsync(() -> {
+                plugin.getCore().getStorage().save(profile);
+                plugin.getServer().getPluginManager().callEvent(
+                        new BukkitFastLoginPremiumToggleEvent(profile, PremiumToggleReason.COMMAND_SELF));
+            });
+
+            plugin.getCore().sendLocaleMessage("add-premium", sender);
+        }
+    }
+
+    private void onPremiumOther(CommandSender sender, Command command, String[] args) {
+        if (!hasOtherPermission(sender, command)) {
+            return;
+        }
+
+        if (forwardPremiumCommand(sender, args[0])) {
+            return;
+        }
+
+        //todo: load async
+        StoredProfile profile = plugin.getCore().getStorage().loadProfile(args[0]);
+        if (profile == null) {
+            plugin.getCore().sendLocaleMessage("player-unknown", sender);
+            return;
+        }
+
+        if (profile.isPremium()) {
+            plugin.getCore().sendLocaleMessage("already-exists-other", sender);
+        } else {
+            //todo: resolve uuid
+            profile.setPremium(true);
+            plugin.getScheduler().runAsync(() -> {
+                plugin.getCore().getStorage().save(profile);
+                plugin.getServer().getPluginManager().callEvent(
+                        new BukkitFastLoginPremiumToggleEvent(profile, PremiumToggleReason.COMMAND_OTHER));
+            });
+
+            plugin.getCore().sendLocaleMessage("add-premium-other", sender);
+        }
+    }
+
+    private boolean forwardPremiumCommand(CommandSender sender, String target) {
+        return forwardBungeeCommand(sender, target, true);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/command/ToggleCommand.java

@@ -0,0 +1,93 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.command;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.message.ChangePremiumMessage;
+import com.github.games647.fastlogin.core.message.ChannelMessage;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.messaging.PluginMessageRecipient;
+
+import java.util.Optional;
+
+public abstract class ToggleCommand implements CommandExecutor {
+
+    protected final FastLoginBukkit plugin;
+
+    public ToggleCommand(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    protected boolean hasOtherPermission(CommandSender sender, Command cmd) {
+        if (sender.hasPermission(cmd.getPermission() + ".other")) {
+            return true;
+        }
+
+        plugin.getCore().sendLocaleMessage("no-permission", sender);
+        return false;
+    }
+
+    protected boolean forwardBungeeCommand(CommandSender sender, String target, boolean activate) {
+        if (plugin.getBungeeManager().isEnabled()) {
+            sendBungeeActivateMessage(sender, target, activate);
+            plugin.getCore().sendLocaleMessage("wait-on-proxy", sender);
+            return true;
+        }
+
+        return false;
+    }
+
+    protected boolean isConsole(CommandSender sender) {
+        if (sender instanceof Player) {
+            return false;
+        }
+
+        //console or command block
+        sender.sendMessage(plugin.getCore().getMessage("no-console"));
+        return true;
+    }
+
+    protected void sendBungeeActivateMessage(CommandSender invoker, String target, boolean activate) {
+        if (invoker instanceof PluginMessageRecipient) {
+            ChannelMessage message = new ChangePremiumMessage(target, activate, true);
+            plugin.getBungeeManager().sendPluginMessage((PluginMessageRecipient) invoker, message);
+        } else {
+            Optional<? extends Player> optPlayer = Bukkit.getServer().getOnlinePlayers().stream().findFirst();
+            if (!optPlayer.isPresent()) {
+                plugin.getLog().info("No player online to send a plugin message to the proxy");
+                return;
+            }
+
+            Player sender = optPlayer.get();
+            ChannelMessage message = new ChangePremiumMessage(target, activate, false);
+            plugin.getBungeeManager().sendPluginMessage(sender, message);
+        }
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/event/BukkitFastLoginAutoLoginEvent.java

@@ -0,0 +1,78 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.event;
+
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.shared.event.FastLoginAutoLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+public class BukkitFastLoginAutoLoginEvent extends Event implements FastLoginAutoLoginEvent, Cancellable {
+
+    private static final HandlerList HANDLERS = new HandlerList();
+    private final LoginSession session;
+    private final StoredProfile profile;
+    private boolean cancelled;
+
+    public BukkitFastLoginAutoLoginEvent(LoginSession session, StoredProfile profile) {
+        super(true);
+
+        this.session = session;
+        this.profile = profile;
+    }
+
+    @Override
+    public LoginSession getSession() {
+        return session;
+    }
+
+    @Override
+    public StoredProfile getProfile() {
+        return profile;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/event/BukkitFastLoginPreLoginEvent.java

@@ -0,0 +1,73 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.event;
+
+import com.github.games647.fastlogin.core.shared.LoginSource;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+public class BukkitFastLoginPreLoginEvent extends Event implements FastLoginPreLoginEvent {
+
+    private static final HandlerList HANDLERS = new HandlerList();
+    private final String username;
+    private final LoginSource source;
+    private final StoredProfile profile;
+
+    public BukkitFastLoginPreLoginEvent(String username, LoginSource source, StoredProfile profile) {
+        super(true);
+
+        this.username = username;
+        this.source = source;
+        this.profile = profile;
+    }
+
+    @Override
+    public String getUsername() {
+        return username;
+    }
+
+    @Override
+    public LoginSource getSource() {
+        return source;
+    }
+
+    @Override
+    public StoredProfile getProfile() {
+        return profile;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/event/BukkitFastLoginPremiumToggleEvent.java

@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.event;
+
+import com.github.games647.fastlogin.core.shared.event.FastLoginPremiumToggleEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+public class BukkitFastLoginPremiumToggleEvent extends Event implements FastLoginPremiumToggleEvent {
+
+    private static final HandlerList HANDLERS = new HandlerList();
+    private final StoredProfile profile;
+    private final PremiumToggleReason reason;
+
+    public BukkitFastLoginPremiumToggleEvent(StoredProfile profile, PremiumToggleReason reason) {
+        super(true);
+        this.profile = profile;
+        this.reason = reason;
+    }
+
+    @Override
+    public StoredProfile getProfile() {
+        return profile;
+    }
+
+    @Override
+    public PremiumToggleReason getReason() {
+        return reason;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/hook/AuthMeHook.java

@@ -0,0 +1,114 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import fr.xephi.authme.api.v3.AuthMeApi;
+import fr.xephi.authme.events.RestoreSessionEvent;
+import fr.xephi.authme.process.Management;
+import fr.xephi.authme.process.register.executors.ApiPasswordRegisterParams;
+import fr.xephi.authme.process.register.executors.RegistrationMethod;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+
+import java.lang.reflect.Field;
+
+/**
+ * GitHub: <a href="https://github.com/Xephi/AuthMeReloaded/">...</a>
+ * <p>
+ * Project page:
+ * <p>
+ * Bukkit: <a href="https://dev.bukkit.org/bukkit-plugins/authme-reloaded/">...</a>
+ * <p>
+ * Spigot: <a href="https://www.spigotmc.org/resources/authme-reloaded.6269/">...</a>
+ */
+public class AuthMeHook implements AuthPlugin<Player>, Listener {
+
+    private final FastLoginBukkit plugin;
+
+    private final AuthMeApi authmeAPI;
+    private Management authmeManagement;
+
+    public AuthMeHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+        this.authmeAPI = AuthMeApi.getInstance();
+
+        if (plugin.getCore().getConfig().getBoolean("respectIpLimit", false)) {
+            try {
+                Field managementField = this.authmeAPI.getClass().getDeclaredField("management");
+                managementField.setAccessible(true);
+                this.authmeManagement = (Management) managementField.get(this.authmeAPI);
+            } catch (NoSuchFieldException | IllegalAccessException exception) {
+                this.authmeManagement = null;
+            }
+        }
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onSessionRestore(RestoreSessionEvent restoreSessionEvent) {
+        Player player = restoreSessionEvent.getPlayer();
+
+        BukkitLoginSession session = plugin.getSession(player.spigot().getRawAddress());
+        if (session != null && session.isVerified()) {
+            restoreSessionEvent.setCancelled(true);
+        }
+    }
+
+    @Override
+    public boolean forceLogin(Player player) {
+        if (authmeAPI.isAuthenticated(player)) {
+            plugin.getLog().warn(ALREADY_AUTHENTICATED, player);
+            return false;
+        }
+
+        //skips registration and login
+        authmeAPI.forceLogin(player);
+        return true;
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        return authmeAPI.isRegistered(playerName);
+    }
+
+    @Override
+    //this automatically login the player too
+    public boolean forceRegister(Player player, String password) {
+        //if we have the management - we can trigger register with IP limit checks
+        if (authmeManagement != null) {
+            authmeManagement.performRegister(RegistrationMethod.PASSWORD_REGISTRATION,
+                    ApiPasswordRegisterParams.of(player, password, true));
+        } else {
+            authmeAPI.forceRegister(player, password);
+        }
+
+        return true;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/hook/CrazyLoginHook.java

@@ -0,0 +1,140 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import de.st_ddt.crazylogin.CrazyLogin;
+import de.st_ddt.crazylogin.data.LoginPlayerData;
+import de.st_ddt.crazylogin.databases.CrazyLoginDataDatabase;
+import de.st_ddt.crazylogin.listener.PlayerListener;
+import de.st_ddt.crazylogin.metadata.Authenticated;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import java.util.Optional;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+/**
+ * GitHub: <a href="https://github.com/ST-DDT/CrazyLogin">...</a>
+ * <p>
+ * Project page:
+ * <p>
+ * Bukkit: <a href="https://dev.bukkit.org/server-mods/crazylogin/">...</a>
+ */
+public class CrazyLoginHook implements AuthPlugin<Player> {
+
+    private final FastLoginBukkit plugin;
+
+    private final CrazyLogin crazyLoginPlugin;
+    private final PlayerListener playerListener;
+
+    public CrazyLoginHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+
+        crazyLoginPlugin = CrazyLogin.getPlugin();
+        playerListener = getListener();
+    }
+
+    @Override
+    public boolean forceLogin(Player player) {
+        //not thread-safe operation
+        Future<Optional<LoginPlayerData>> future = Bukkit.getScheduler().callSyncMethod(plugin, () -> {
+            LoginPlayerData playerData = crazyLoginPlugin.getPlayerData(player);
+            if (playerData != null) {
+                //mark the account as logged in
+                playerData.setLoggedIn(true);
+
+                String ip = player.getAddress().getAddress().getHostAddress();
+//this should be done after login to restore the inventory, show players, prevent potential memory leaks...
+//from: https://github.com/ST-DDT/CrazyLogin/blob/master/src/main/java/de/st_ddt/crazylogin/CrazyLogin.java#L1948
+                playerData.resetLoginFails();
+                player.setFireTicks(0);
+
+                if (playerListener != null) {
+                    playerListener.removeMovementBlocker(player);
+                    playerListener.disableHidenInventory(player);
+                    playerListener.disableSaveLogin(player);
+                    playerListener.unhidePlayer(player);
+                }
+
+//loginFailuresPerIP.remove(IP);
+//illegalCommandUsesPerIP.remove(IP);
+//tempBans.remove(IP);
+                playerData.addIP(ip);
+                player.setMetadata("Authenticated", new Authenticated(crazyLoginPlugin, player));
+                crazyLoginPlugin.unregisterDynamicHooks();
+                return Optional.of(playerData);
+            }
+
+            return Optional.empty();
+        });
+
+        try {
+            Optional<LoginPlayerData> result = future.get().filter(LoginPlayerData::isLoggedIn);
+            if (result.isPresent()) {
+                //SQL-Queries should run async
+                crazyLoginPlugin.getCrazyDatabase().saveWithoutPassword(result.get());
+                return true;
+            }
+        } catch (InterruptedException | ExecutionException ex) {
+            plugin.getLog().error("Failed to forceLogin player: {}", player, ex);
+            return false;
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        return crazyLoginPlugin.getPlayerData(playerName) != null;
+    }
+
+    @Override
+    public boolean forceRegister(Player player, String password) {
+        CrazyLoginDataDatabase crazyDatabase = crazyLoginPlugin.getCrazyDatabase();
+
+        //this executes a sql query and accesses only thread safe collections, so we can run it async
+        LoginPlayerData playerData = crazyLoginPlugin.getPlayerData(player.getName());
+        if (playerData == null) {
+            //create a fake account - this will be saved to the database with the password=FAILEDLOADING
+            //user cannot log in with that password unless the admin uses plain text
+            //this automatically marks the player as logged in
+            crazyDatabase.save(new LoginPlayerData(player));
+            return forceLogin(player);
+        }
+
+        return false;
+    }
+
+    protected PlayerListener getListener() {
+        FieldAccessor accessor = Accessors.getFieldAccessor(crazyLoginPlugin.getClass(), PlayerListener.class, true);
+        return (PlayerListener) accessor.get(crazyLoginPlugin);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/hook/LogItHook.java

@@ -0,0 +1,81 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import io.github.lucaseasedup.logit.CancelledState;
+import io.github.lucaseasedup.logit.LogItCore;
+import io.github.lucaseasedup.logit.account.Account;
+import io.github.lucaseasedup.logit.session.SessionManager;
+import org.bukkit.entity.Player;
+
+import java.time.Instant;
+
+/**
+ * GitHub: <a href="https://github.com/XziomekX/LogIt">...</a>
+ * <p>
+ * Project page:
+ * <p>
+ * Bukkit: Unknown
+ * <p>
+ * Spigot: Unknown
+ */
+public class LogItHook implements AuthPlugin<Player> {
+
+    private final FastLoginBukkit plugin;
+
+    public LogItHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean forceLogin(Player player) {
+        SessionManager sessionManager = LogItCore.getInstance().getSessionManager();
+        if (sessionManager.isSessionAlive(player)) {
+            plugin.getLog().warn(ALREADY_AUTHENTICATED, player);
+            return false;
+        }
+
+        return sessionManager.startSession(player) == CancelledState.NOT_CANCELLED;
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        return LogItCore.getInstance().getAccountManager().isRegistered(playerName);
+    }
+
+    @Override
+    public boolean forceRegister(Player player, String password) {
+        Account account = new Account(player.getName());
+        account.changePassword(password);
+
+        Instant now = Instant.now();
+        account.setLastActiveDate(now.getEpochSecond());
+        account.setRegistrationDate(now.getEpochSecond());
+        return LogItCore.getInstance().getAccountManager().insertAccount(account) == CancelledState.NOT_CANCELLED;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/hook/LoginSecurityHook.java

@@ -0,0 +1,77 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import com.lenis0012.bukkit.loginsecurity.LoginSecurity;
+import com.lenis0012.bukkit.loginsecurity.session.AuthService;
+import com.lenis0012.bukkit.loginsecurity.session.PlayerSession;
+import com.lenis0012.bukkit.loginsecurity.session.action.LoginAction;
+import com.lenis0012.bukkit.loginsecurity.session.action.RegisterAction;
+import org.bukkit.entity.Player;
+
+/**
+ * GitHub: <a href="https://github.com/lenis0012/LoginSecurity-2">...</a>
+ * <p>
+ * Project page:
+ * <p>
+ * Bukkit: <a href="https://dev.bukkit.org/bukkit-plugins/loginsecurity/">...</a>
+ * <p>
+ * Spigot: <a href="https://www.spigotmc.org/resources/loginsecurity.19362/">...</a>
+ */
+public class LoginSecurityHook implements AuthPlugin<Player> {
+
+    private final FastLoginBukkit plugin;
+
+    public LoginSecurityHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean forceLogin(Player player) {
+        PlayerSession session = LoginSecurity.getSessionManager().getPlayerSession(player);
+        if (session.isAuthorized()) {
+            plugin.getLog().warn(ALREADY_AUTHENTICATED, player);
+            return true;
+        }
+
+        return session.isAuthorized()
+                || session.performAction(new LoginAction(AuthService.PLUGIN, plugin)).isSuccess();
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        PlayerSession session = LoginSecurity.getSessionManager().getOfflineSession(playerName);
+        return session.isRegistered();
+    }
+
+    @Override
+    public boolean forceRegister(Player player, String password) {
+        PlayerSession session = LoginSecurity.getSessionManager().getPlayerSession(player);
+        return session.performAction(new RegisterAction(AuthService.PLUGIN, plugin, password)).isSuccess();
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/hook/UltraAuthHook.java

@@ -0,0 +1,85 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import ultraauth.api.UltraAuthAPI;
+import ultraauth.managers.PlayerManager;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+/**
+ * Project page:
+ * <p>
+ * Bukkit: <a href="https://dev.bukkit.org/bukkit-plugins/ultraauth-aa/">...</a>
+ * <p>
+ * Spigot: <a href="https://www.spigotmc.org/resources/ultraauth.17044/">...</a>
+ */
+public class UltraAuthHook implements AuthPlugin<Player> {
+
+    private final FastLoginBukkit plugin;
+
+    public UltraAuthHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean forceLogin(Player player) {
+        //not thread-safe
+        Future<Boolean> future = Bukkit.getScheduler().callSyncMethod(plugin, () -> {
+            if (UltraAuthAPI.isAuthenticated(player)) {
+                plugin.getLog().warn(ALREADY_AUTHENTICATED, player);
+                return false;
+            }
+
+            UltraAuthAPI.authenticatedPlayer(player);
+            return UltraAuthAPI.isAuthenticated(player);
+        });
+
+        try {
+            return future.get();
+        } catch (InterruptedException | ExecutionException ex) {
+            plugin.getLog().error("Failed to forceLogin player: {}", player, ex);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        return UltraAuthAPI.isRegisterd(playerName);
+    }
+
+    @Override
+    public boolean forceRegister(Player player, String password) {
+        UltraAuthAPI.setPlayerPasswordOnline(player, password);
+        //the register method silents any exception so check if our entry was saved
+        return PlayerManager.getInstance().checkPlayerPassword(player, password) && forceLogin(player);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/hook/XAuthHook.java

@@ -0,0 +1,110 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import de.luricos.bukkit.xAuth.xAuth;
+import de.luricos.bukkit.xAuth.xAuthPlayer;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+/**
+ * GitHub: <a href="https://github.com/LycanDevelopment/xAuth/">...</a>
+ * <p>
+ * Project page:
+ * <p>
+ * Bukkit: <a href="https://dev.bukkit.org/bukkit-plugins/xauth/">...</a>
+ */
+public class XAuthHook implements AuthPlugin<Player> {
+
+    private final xAuth xAuthPlugin = xAuth.getPlugin();
+    private final FastLoginBukkit plugin;
+
+    public XAuthHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean forceLogin(Player player) {
+        //not thread-safe
+        Future<Boolean> future = Bukkit.getScheduler().callSyncMethod(plugin, () -> {
+            xAuthPlayer xAuthPlayer = xAuthPlugin.getPlayerManager().getPlayer(player);
+            if (xAuthPlayer != null) {
+                if (xAuthPlayer.isAuthenticated()) {
+                    plugin.getLog().warn(ALREADY_AUTHENTICATED, player);
+                    return false;
+                }
+
+                //we checked that the player is premium (paid account)
+                xAuthPlayer.setPremium(true);
+
+                //unprotect the inventory, op status...
+                return xAuthPlugin.getPlayerManager().doLogin(xAuthPlayer);
+            }
+
+            return false;
+        });
+
+        try {
+            return future.get();
+        } catch (InterruptedException | ExecutionException ex) {
+            plugin.getLog().error("Failed to forceLogin player: {}", player, ex);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        //this will load the player if it's not in the cache
+        xAuthPlayer xAuthPlayer = xAuthPlugin.getPlayerManager().getPlayer(playerName);
+        return xAuthPlayer != null && xAuthPlayer.isRegistered();
+    }
+
+    @Override
+    public boolean forceRegister(Player player, final String password) {
+        //not thread-safe
+        Future<Boolean> future = Bukkit.getScheduler().callSyncMethod(xAuthPlugin, () -> {
+            xAuthPlayer xAuthPlayer = xAuthPlugin.getPlayerManager().getPlayer(player);
+            //this should run async because the plugin executes a sql query, but the method
+            //accesses non thread-safe collections :(
+            return xAuthPlayer != null
+                    && xAuthPlugin.getAuthClass(xAuthPlayer).adminRegister(player.getName(), password, null);
+
+        });
+
+        try {
+            //login in the player after registration
+            return future.get() && forceLogin(player);
+        } catch (InterruptedException | ExecutionException ex) {
+            plugin.getLog().error("Failed to forceRegister player: {}", player, ex);
+            return false;
+        }
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/BungeeListener.java

@@ -0,0 +1,137 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener;
+
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.task.ForceLoginTask;
+import com.github.games647.fastlogin.core.PremiumStatus;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import com.github.games647.fastlogin.core.message.LoginActionMessage;
+import com.github.games647.fastlogin.core.message.LoginActionMessage.Type;
+import com.google.common.io.ByteArrayDataInput;
+import com.google.common.io.ByteStreams;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.messaging.PluginMessageListener;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Responsible for receiving messages from a BungeeCord instance.
+ * <p>
+ * This class also receives the plugin message from the bungeecord version of this plugin in order to get notified if
+ * the connection is in online mode.
+ */
+public class BungeeListener implements PluginMessageListener {
+
+    private final FastLoginBukkit plugin;
+
+    public BungeeListener(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public void onPluginMessageReceived(@NotNull String channel, Player player, byte[] message) {
+        ByteArrayDataInput dataInput = ByteStreams.newDataInput(message);
+
+        LoginActionMessage loginMessage = new LoginActionMessage();
+        loginMessage.readFrom(dataInput);
+
+        plugin.getLog().debug("Received plugin message {}", loginMessage);
+
+        Player targetPlayer = player;
+        if (!loginMessage.getPlayerName().equals(player.getName())) {
+            targetPlayer = Bukkit.getPlayerExact(loginMessage.getPlayerName());
+        }
+
+        if (targetPlayer == null) {
+            plugin.getLog().warn("Force action player {} not found", loginMessage.getPlayerName());
+            return;
+        }
+
+        // fail if target player is blocked because already authenticated or wrong bungeecord id
+        if (targetPlayer.hasMetadata(plugin.getName())) {
+            plugin.getLog().warn("Received message {} from a blocked player {}", loginMessage, targetPlayer);
+        } else {
+            UUID sourceId = loginMessage.getProxyId();
+            if (plugin.getBungeeManager().isProxyAllowed(sourceId)) {
+                readMessage(targetPlayer, loginMessage);
+            } else {
+                plugin.getLog().warn("Received proxy id: {} that doesn't exist in the proxy file", sourceId);
+            }
+        }
+    }
+
+    private void readMessage(Player player, LoginActionMessage message) {
+        String playerName = message.getPlayerName();
+        Type type = message.getType();
+
+        plugin.getLog().info("Player info {} command for {} from proxy", type, playerName);
+        if (type == Type.LOGIN) {
+            onLoginMessage(player, playerName);
+        } else if (type == Type.REGISTER) {
+            onRegisterMessage(player, playerName);
+        } else if (type == Type.CRACKED) {
+            //we don't start a force login task here so update it manually
+            plugin.getPremiumPlayers().put(player.getUniqueId(), PremiumStatus.CRACKED);
+        }
+    }
+
+    private void onLoginMessage(Player player, String playerName) {
+        BukkitLoginSession playerSession = new BukkitLoginSession(playerName, true);
+        startLoginTaskIfReady(player, playerSession);
+    }
+
+    private void onRegisterMessage(Player player, String playerName) {
+        Bukkit.getScheduler().runTaskAsynchronously(plugin, () -> {
+            AuthPlugin<Player> authPlugin = plugin.getCore().getAuthPluginHook();
+            try {
+                //we need to check if the player is registered on Bukkit too
+                if (authPlugin == null || !authPlugin.isRegistered(playerName)) {
+                    BukkitLoginSession playerSession = new BukkitLoginSession(playerName, false);
+                    startLoginTaskIfReady(player, playerSession);
+                }
+            } catch (Exception ex) {
+                plugin.getLog().error("Failed to query isRegistered for player: {}", player, ex);
+            }
+        });
+    }
+
+    private void startLoginTaskIfReady(Player player, BukkitLoginSession session) {
+        session.setVerified(true);
+        plugin.putSession(player.spigot().getRawAddress(), session);
+
+        // only start a new login task if the join event fired earlier. This event then didn't
+        boolean result = plugin.getBungeeManager().didJoinEventFired(player);
+        plugin.getLog().info("Delaying force login until join event fired?: {}", result);
+        if (result) {
+            Runnable forceLoginTask = new ForceLoginTask(plugin.getCore(), player, session);
+            Bukkit.getScheduler().runTaskAsynchronously(plugin, forceLoginTask);
+        }
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/ConnectionListener.java

@@ -0,0 +1,122 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener;
+
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.task.FloodgateAuthTask;
+import com.github.games647.fastlogin.bukkit.task.ForceLoginTask;
+import com.github.games647.fastlogin.core.hooks.bedrock.FloodgateService;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerLoginEvent;
+import org.bukkit.event.player.PlayerLoginEvent.Result;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.metadata.Metadatable;
+import org.geysermc.floodgate.api.player.FloodgatePlayer;
+
+/**
+ * This listener tells authentication plugins weather the player has a premium account. So the
+ * plugin can skip authentication.
+ */
+public class ConnectionListener implements Listener {
+
+    private static final long DELAY_LOGIN = 20L / 2;
+
+    private final FastLoginBukkit plugin;
+
+    public ConnectionListener(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST)
+    public void onPlayerLogin(PlayerLoginEvent loginEvent) {
+        removeBlockedStatus(loginEvent.getPlayer());
+        if (loginEvent.getResult() == Result.ALLOWED && !plugin.isServerFullyStarted()) {
+            loginEvent.disallow(Result.KICK_OTHER, plugin.getCore().getMessage("not-started"));
+        }
+    }
+
+    @EventHandler(ignoreCancelled = true)
+    public void onPlayerJoin(PlayerJoinEvent joinEvent) {
+        Player player = joinEvent.getPlayer();
+
+        Bukkit.getScheduler().runTaskLater(plugin, () -> {
+            delayForceLogin(player);
+            // delay the login process to let auth plugins initialize the player
+            // Magic number however as there is no direct event from those plugins
+        }, DELAY_LOGIN);
+    }
+
+    private void delayForceLogin(Player player) {
+        // session exists so the player is ready for force login
+        // cases: Paper (firing BungeeCord message before PlayerJoinEvent) or not running BungeeCord and already
+        // having the login session from the login process
+        BukkitLoginSession session = plugin.getSession(player.spigot().getRawAddress());
+
+        if (session == null) {
+            // Floodgate players usually don't have a session at this point
+            // exception: if force login by bungee message had been delayed
+            FloodgateService floodgateService = plugin.getFloodgateService();
+            if (floodgateService != null) {
+                FloodgatePlayer floodgatePlayer = floodgateService.getBedrockPlayer(player.getUniqueId());
+                if (floodgatePlayer != null) {
+                    Runnable floodgateAuthTask = new FloodgateAuthTask(plugin.getCore(), player, floodgatePlayer);
+                    Bukkit.getScheduler().runTaskAsynchronously(plugin, floodgateAuthTask);
+                    return;
+                }
+            }
+
+            String sessionId = plugin.getSessionId(player.spigot().getRawAddress());
+            plugin.getLog().info("No on-going login session for player: {} with ID {}. ", player, sessionId);
+            plugin.getLog().info("Setups using Minecraft proxies will start delayed "
+                + "when the command from the proxy is received");
+        } else {
+            Runnable forceLoginTask = new ForceLoginTask(plugin.getCore(), player, session);
+            Bukkit.getScheduler().runTaskAsynchronously(plugin, forceLoginTask);
+        }
+
+        plugin.getBungeeManager().markJoinEventFired(player);
+    }
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent quitEvent) {
+        Player player = quitEvent.getPlayer();
+
+        removeBlockedStatus(player);
+        plugin.getCore().getPendingConfirms().remove(player.getUniqueId());
+        plugin.getPremiumPlayers().remove(player.getUniqueId());
+        plugin.getBungeeManager().cleanup(player);
+    }
+
+    private void removeBlockedStatus(Metadatable player) {
+        player.removeMetadata(plugin.getName(), plugin);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/PaperCacheListener.java

@@ -0,0 +1,66 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener;
+
+import com.destroystokyo.paper.profile.ProfileProperty;
+import com.github.games647.craftapi.model.skin.Textures;
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.AsyncPlayerPreLoginEvent;
+import org.bukkit.event.player.AsyncPlayerPreLoginEvent.Result;
+
+public class PaperCacheListener implements Listener {
+
+    private final FastLoginBukkit plugin;
+
+    public PaperCacheListener(final FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    //if paper is used - player skin must be set at pre login, otherwise user cache is used
+    // user cache makes premium name change basically impossible
+    public void onAsyncPlayerPreLogin(AsyncPlayerPreLoginEvent event) {
+        if (event.getLoginResult() != Result.ALLOWED) {
+            return;
+        }
+
+        // event gives us only IP, not the port, so we need to loop through all the sessions
+        for (BukkitLoginSession session : plugin.getLoginSessions().values()) {
+            if (!event.getName().equals(session.getUsername())) {
+                continue;
+            }
+
+            session.getSkin().ifPresent(skin -> event.getPlayerProfile().setProperty(new ProfileProperty(Textures.KEY,
+                    skin.getValue(), skin.getSignature())));
+            break;
+        }
+    }
+
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/EncryptionUtil.java

@@ -0,0 +1,226 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.google.common.hash.Hasher;
+import com.google.common.hash.Hashing;
+import com.google.common.io.Resources;
+import com.google.common.primitives.Longs;
+import lombok.val;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+import java.io.IOException;
+import java.math.BigInteger;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.security.InvalidKeyException;
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.Signature;
+import java.security.SignatureException;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.X509EncodedKeySpec;
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Base64;
+import java.util.Base64.Encoder;
+import java.util.Random;
+import java.util.UUID;
+
+/**
+ * Encryption and decryption minecraft util for connection between servers
+ * and paid Minecraft account clients.
+ */
+final class EncryptionUtil {
+
+    public static final int VERIFY_TOKEN_LENGTH = 4;
+    public static final String KEY_PAIR_ALGORITHM = "RSA";
+
+    private static final int RSA_LENGTH = 2_048;
+
+    private static final PublicKey MOJANG_SESSION_KEY;
+    private static final int LINE_LENGTH = 76;
+    private static final Encoder KEY_ENCODER = Base64.getMimeEncoder(
+            LINE_LENGTH, "\n".getBytes(StandardCharsets.UTF_8)
+    );
+    private static final int MILLISECOND_SIZE = 8;
+    private static final int UUID_SIZE = 2 * MILLISECOND_SIZE;
+
+    static {
+        try {
+            MOJANG_SESSION_KEY = loadMojangSessionKey();
+        } catch (IOException | NoSuchAlgorithmException | InvalidKeySpecException ex) {
+            throw new RuntimeException("Failed to load Mojang session key", ex);
+        }
+    }
+
+    private EncryptionUtil() {
+        throw new RuntimeException("No instantiation of utility classes allowed");
+    }
+
+    /**
+     * Generate an RSA key pair
+     *
+     * @return The RSA key pair.
+     */
+    public static KeyPair generateKeyPair() {
+        try {
+            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(KEY_PAIR_ALGORITHM);
+
+            keyPairGenerator.initialize(RSA_LENGTH);
+            return keyPairGenerator.generateKeyPair();
+        } catch (NoSuchAlgorithmException nosuchalgorithmexception) {
+            // Should be existing in every vm
+            throw new ExceptionInInitializerError(nosuchalgorithmexception);
+        }
+    }
+
+    /**
+     * Generate a random token. This is used to verify that we are communicating with the same player
+     * in a login session.
+     *
+     * @param random random generator
+     * @return a token with 4 bytes long
+     */
+    public static byte[] generateVerifyToken(Random random) {
+        byte[] token = new byte[VERIFY_TOKEN_LENGTH];
+        random.nextBytes(token);
+        return token;
+    }
+
+    /**
+     * Generate the server id based on client and server data.
+     *
+     * @param serverId     session for the current login attempt
+     * @param sharedSecret shared secret between the client and the server
+     * @param publicKey    public key of the server
+     * @return the server id formatted as a hexadecimal string.
+     */
+    public static String getServerIdHashString(String serverId, SecretKey sharedSecret, PublicKey publicKey) {
+        byte[] serverHash = getServerIdHash(serverId, publicKey, sharedSecret);
+        return (new BigInteger(serverHash)).toString(16);
+    }
+
+    /**
+     * Decrypts the content and extracts the key spec.
+     *
+     * @param privateKey private server key
+     * @param sharedKey  the encrypted shared key
+     * @return shared secret key
+     */
+    public static SecretKey decryptSharedKey(PrivateKey privateKey, byte[] sharedKey)
+            throws NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException,
+            BadPaddingException, InvalidKeyException {
+        return new SecretKeySpec(decrypt(privateKey, sharedKey), "AES");
+    }
+
+    public static boolean verifyClientKey(ClientPublicKey clientKey, Instant verifyTimestamp, UUID premiumId)
+            throws NoSuchAlgorithmException, InvalidKeyException, SignatureException {
+        if (clientKey.isExpired(verifyTimestamp)) {
+            return false;
+        }
+
+        Signature verifier = Signature.getInstance("SHA1withRSA");
+        // key of the signer
+        verifier.initVerify(MOJANG_SESSION_KEY);
+        verifier.update(toSignable(clientKey, premiumId));
+        return verifier.verify(clientKey.signature());
+    }
+
+    private static byte[] toSignable(ClientPublicKey clientPublicKey, UUID ownerPremiumId) {
+        if (ownerPremiumId == null) {
+            long expiry = clientPublicKey.expiry().toEpochMilli();
+            String encoded = KEY_ENCODER.encodeToString(clientPublicKey.key().getEncoded());
+            return (expiry + "-----BEGIN RSA PUBLIC KEY-----\n" + encoded + "\n-----END RSA PUBLIC KEY-----\n")
+                    .getBytes(StandardCharsets.US_ASCII);
+        }
+
+        byte[] keyData = clientPublicKey.key().getEncoded();
+        return ByteBuffer.allocate(keyData.length + UUID_SIZE + MILLISECOND_SIZE)
+                .putLong(ownerPremiumId.getMostSignificantBits())
+                .putLong(ownerPremiumId.getLeastSignificantBits())
+                .putLong(clientPublicKey.expiry().toEpochMilli())
+                .put(keyData)
+                .array();
+    }
+
+    public static boolean verifyNonce(byte[] expected, PrivateKey decryptionKey, byte[] encryptedNonce)
+            throws NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException,
+            BadPaddingException, InvalidKeyException {
+        byte[] decryptedNonce = decrypt(decryptionKey, encryptedNonce);
+        return Arrays.equals(expected, decryptedNonce);
+    }
+
+    public static boolean verifySignedNonce(byte[] nonce, PublicKey clientKey, long signatureSalt, byte[] signature)
+            throws NoSuchAlgorithmException, InvalidKeyException, SignatureException {
+        Signature verifier = Signature.getInstance("SHA256withRSA");
+        // key of the signer
+        verifier.initVerify(clientKey);
+
+        verifier.update(nonce);
+        verifier.update(Longs.toByteArray(signatureSalt));
+        return verifier.verify(signature);
+    }
+
+    private static PublicKey loadMojangSessionKey()
+            throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
+        val keyUrl = FastLoginBukkit.class.getClassLoader().getResource("yggdrasil_session_pubkey.der");
+        val keyData = Resources.toByteArray(keyUrl);
+        val keySpec = new X509EncodedKeySpec(keyData);
+
+        return KeyFactory.getInstance("RSA").generatePublic(keySpec);
+    }
+
+    private static byte[] decrypt(PrivateKey key, byte[] data)
+            throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException,
+            IllegalBlockSizeException, BadPaddingException {
+        Cipher cipher = Cipher.getInstance(key.getAlgorithm());
+        cipher.init(Cipher.DECRYPT_MODE, key);
+        return cipher.doFinal(data);
+    }
+
+    private static byte[] getServerIdHash(String sessionId, PublicKey publicKey, SecretKey sharedSecret) {
+        @SuppressWarnings("deprecation")
+        Hasher hasher = Hashing.sha1().newHasher();
+
+        hasher.putBytes(sessionId.getBytes(StandardCharsets.ISO_8859_1));
+        hasher.putBytes(sharedSecret.getEncoded());
+        hasher.putBytes(publicKey.getEncoded());
+
+        return hasher.hash().asBytes();
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/NameCheckTask.java

@@ -0,0 +1,118 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.events.PacketEvent;
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.event.BukkitFastLoginPreLoginEvent;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.github.games647.fastlogin.core.shared.JoinManagement;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+import java.security.PublicKey;
+import java.util.Random;
+
+public class NameCheckTask extends JoinManagement<Player, CommandSender, ProtocolLibLoginSource>
+    implements Runnable {
+
+    private final FastLoginBukkit plugin;
+    private final PacketEvent packetEvent;
+
+    private final ClientPublicKey clientKey;
+    private final PublicKey serverKey;
+
+    private final Random random;
+
+    private final Player player;
+    private final String username;
+
+    public NameCheckTask(FastLoginBukkit plugin, Random random, Player player, PacketEvent packetEvent,
+                         String username, ClientPublicKey clientKey, PublicKey serverKey) {
+        super(plugin.getCore(), plugin.getCore().getAuthPluginHook(), plugin.getBedrockService());
+
+        this.plugin = plugin;
+        this.packetEvent = packetEvent;
+        this.clientKey = clientKey;
+        this.serverKey = serverKey;
+        this.random = random;
+        this.player = player;
+        this.username = username;
+    }
+
+    @Override
+    public void run() {
+        try {
+            super.onLogin(username, new ProtocolLibLoginSource(player, random, serverKey, clientKey));
+        } finally {
+            ProtocolLibrary.getProtocolManager().getAsynchronousManager().signalPacketTransmission(packetEvent);
+        }
+    }
+
+    @Override
+    public FastLoginPreLoginEvent callFastLoginPreLoginEvent(String username, ProtocolLibLoginSource source,
+                                                             StoredProfile profile) {
+        BukkitFastLoginPreLoginEvent event = new BukkitFastLoginPreLoginEvent(username, source, profile);
+        plugin.getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
+    //Minecraft server implementation
+    //https://github.com/bergerkiller/CraftSource/blob/master/net.minecraft.server/LoginListener.java#L161
+    @Override
+    public void requestPremiumLogin(ProtocolLibLoginSource source, StoredProfile profile,
+                                    String username, boolean registered) {
+        try {
+            source.enableOnlinemode();
+        } catch (Exception ex) {
+            plugin.getLog().error("Cannot send encryption packet. Falling back to cracked login for: {}", profile, ex);
+            return;
+        }
+
+        String ip = player.getAddress().getAddress().getHostAddress();
+        core.getPendingLogin().put(ip + username, new Object());
+
+        byte[] verify = source.getVerifyToken();
+        ClientPublicKey clientKey = source.getClientKey();
+
+        BukkitLoginSession playerSession = new BukkitLoginSession(username, verify, clientKey, registered, profile);
+        plugin.putSession(player.getAddress(), playerSession);
+        //cancel only if the player has a paid account otherwise login as normal offline player
+        synchronized (packetEvent.getAsyncMarker().getProcessingLock()) {
+            packetEvent.setCancelled(true);
+        }
+    }
+
+    @Override
+    public void startCrackedSession(ProtocolLibLoginSource source, StoredProfile profile, String username) {
+        BukkitLoginSession loginSession = new BukkitLoginSession(username, profile);
+        plugin.putSession(player.getAddress(), loginSession);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java

@@ -0,0 +1,329 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.events.PacketAdapter;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.injector.PacketFilterManager;
+import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import com.comphenix.protocol.utility.MinecraftVersion;
+import com.comphenix.protocol.wrappers.BukkitConverters;
+import com.comphenix.protocol.wrappers.Converters;
+import com.comphenix.protocol.wrappers.WrappedGameProfile;
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.github.games647.fastlogin.core.antibot.AntiBotService;
+import com.github.games647.fastlogin.core.antibot.AntiBotService.Action;
+import com.mojang.datafixers.util.Either;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandler;
+import io.netty.util.AttributeKey;
+import lombok.val;
+import org.bukkit.entity.Player;
+import org.geysermc.floodgate.api.player.FloodgatePlayer;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import java.net.InetSocketAddress;
+import java.security.InvalidKeyException;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+import java.security.PublicKey;
+import java.security.SecureRandom;
+import java.security.SignatureException;
+import java.time.Instant;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.Function;
+
+import static com.comphenix.protocol.PacketType.Login.Client.ENCRYPTION_BEGIN;
+import static com.comphenix.protocol.PacketType.Login.Client.START;
+
+public class ProtocolLibListener extends PacketAdapter {
+
+    private final FastLoginBukkit plugin;
+    private final PlayerInjectionHandler handler;
+
+    //just create a new once on plugin enable. This used for verify token generation
+    private final SecureRandom random = new SecureRandom();
+    private final KeyPair keyPair = EncryptionUtil.generateKeyPair();
+    private final AntiBotService antiBotService;
+
+    private final boolean verifyClientKeys;
+
+    public ProtocolLibListener(FastLoginBukkit plugin, AntiBotService antiBotService, boolean verifyClientKeys) {
+        //run async in order to not block the server, because we are making api calls to Mojang
+        super(params()
+                .plugin(plugin)
+                .types(START, ENCRYPTION_BEGIN)
+                .optionAsync());
+
+        this.plugin = plugin;
+        this.antiBotService = antiBotService;
+        this.verifyClientKeys = verifyClientKeys;
+        this.handler = getHandler();
+    }
+
+    public static void register(FastLoginBukkit plugin, AntiBotService antiBotService, boolean verifyClientKeys) {
+        // they will be created with a static builder, because otherwise it will throw a NoClassDefFoundError
+        // TODO: make synchronous processing, but do web or database requests async
+        ProtocolLibrary.getProtocolManager()
+                .getAsynchronousManager()
+                .registerAsyncHandler(new ProtocolLibListener(plugin, antiBotService, verifyClientKeys))
+                .start();
+    }
+
+    @Override
+    public void onPacketReceiving(PacketEvent packetEvent) {
+        if (packetEvent.isCancelled()
+                || plugin.getCore().getAuthPluginHook() == null
+                || !plugin.isServerFullyStarted()) {
+            return;
+        }
+
+        plugin.getLog().info("New packet {} from {}", packetEvent.getPacketType(), packetEvent.getPlayer());
+
+        Player sender = packetEvent.getPlayer();
+        PacketType packetType = packetEvent.getPacketType();
+        if (packetType == START) {
+
+            if (plugin.getFloodgateService() != null) {
+                boolean success = processFloodgateTasks(packetEvent);
+                // don't continue execution if the player was kicked by Floodgate
+                if (!success) {
+                    return;
+                }
+            }
+
+            PacketContainer packet = packetEvent.getPacket();
+
+            InetSocketAddress address = sender.getAddress();
+            String username = getUsername(packet);
+
+            Action action = antiBotService.onIncomingConnection(address, username);
+            switch (action) {
+                case Ignore:
+                    // just ignore
+                    return;
+                case Block:
+                    String message = plugin.getCore().getMessage("kick-antibot");
+                    sender.kickPlayer(message);
+                    break;
+                case Continue:
+                default:
+                    //player.getName() won't work at this state
+                    onLoginStart(packetEvent, sender, username);
+                    break;
+            }
+        } else {
+            onEncryptionBegin(packetEvent, sender);
+        }
+    }
+
+    private void onEncryptionBegin(PacketEvent packetEvent, Player sender) {
+        byte[] sharedSecret = packetEvent.getPacket().getByteArrays().read(0);
+
+        BukkitLoginSession session = plugin.getSession(sender.getAddress());
+        if (session == null) {
+            plugin.getLog().warn("Profile {} tried to send encryption response at invalid state", sender.getAddress());
+            sender.kickPlayer(plugin.getCore().getMessage("invalid-request"));
+        } else {
+            byte[] expectedVerifyToken = session.getVerifyToken();
+            if (verifyNonce(sender, packetEvent.getPacket(), session.getClientPublicKey(), expectedVerifyToken)) {
+                packetEvent.getAsyncMarker().incrementProcessingDelay();
+
+                Runnable verifyTask = new VerifyResponseTask(
+                        plugin, packetEvent, sender, session, sharedSecret, keyPair
+                );
+                plugin.getScheduler().runAsync(verifyTask);
+            } else {
+                sender.kickPlayer(plugin.getCore().getMessage("invalid-verify-token"));
+            }
+        }
+    }
+
+    private boolean verifyNonce(Player sender, PacketContainer packet,
+                                ClientPublicKey clientPublicKey, byte[] expectedToken) {
+        try {
+            if (new MinecraftVersion(1, 19, 0).atOrAbove()
+                    && !new MinecraftVersion(1, 19, 3).atOrAbove()) {
+                Either<byte[], ?> either = packet.getSpecificModifier(Either.class).read(0);
+                if (clientPublicKey == null) {
+                    Optional<byte[]> left = either.left();
+                    if (!left.isPresent()) {
+                        plugin.getLog().error("No verify token sent if requested without player signed key {}", sender);
+                        return false;
+                    }
+
+                    return EncryptionUtil.verifyNonce(expectedToken, keyPair.getPrivate(), left.get());
+                } else {
+                    Optional<?> optSignatureData = either.right();
+                    if (!optSignatureData.isPresent()) {
+                        plugin.getLog().error("No signature given to sent player signing key {}", sender);
+                        return false;
+                    }
+
+                    Object signatureData = optSignatureData.get();
+                    long salt = FuzzyReflection.getFieldValue(signatureData, Long.TYPE, true);
+                    byte[] signature = FuzzyReflection.getFieldValue(signatureData, byte[].class, true);
+
+                    PublicKey publicKey = clientPublicKey.key();
+                    return EncryptionUtil.verifySignedNonce(expectedToken, publicKey, salt, signature);
+                }
+            } else {
+                byte[] nonce = packet.getByteArrays().read(1);
+                return EncryptionUtil.verifyNonce(expectedToken, keyPair.getPrivate(), nonce);
+            }
+        } catch (NoSuchAlgorithmException | InvalidKeyException | SignatureException | NoSuchPaddingException
+                 | IllegalBlockSizeException | BadPaddingException signatureEx) {
+            plugin.getLog().error("Invalid signature from player {}", sender, signatureEx);
+            return false;
+        }
+    }
+
+    private void onLoginStart(PacketEvent packetEvent, Player player, String username) {
+        //this includes ip:port. Should be unique for an incoming login request with a timeout of 2 minutes
+        String sessionKey = player.getAddress().toString();
+
+        //remove old data every time on a new login in order to keep the session only for one person
+        plugin.removeSession(player.getAddress());
+
+        PacketContainer packet = packetEvent.getPacket();
+        Optional<ClientPublicKey> clientKey;
+        if (new MinecraftVersion(1, 19, 3).atOrAbove()) {
+            // public key sent separate
+            clientKey = Optional.empty();
+        } else {
+            val profileKey = packet.getOptionals(BukkitConverters.getWrappedPublicKeyDataConverter())
+                    .optionRead(0);
+
+            clientKey = profileKey.flatMap(Function.identity()).flatMap(data -> {
+                Instant expires = data.getExpireTime();
+                PublicKey key = data.getKey();
+                byte[] signature = data.getSignature();
+                return Optional.of(ClientPublicKey.of(expires, key, signature));
+            });
+
+            // start reading from index 1, because 0 is already used by the public key
+            Optional<UUID> sessionUUID = packet.getOptionals(Converters.passthrough(UUID.class)).readSafely(1);
+            if (verifyClientKeys && sessionUUID.isPresent() && clientKey.isPresent()
+                    && verifyPublicKey(clientKey.get(), sessionUUID.get())) {
+                // missing or incorrect
+                // expired always not allowed
+                player.kickPlayer(plugin.getCore().getMessage("invalid-public-key"));
+                plugin.getLog().warn("Invalid public key from player {}", username);
+                return;
+            }
+        }
+
+
+        plugin.getLog().trace("GameProfile {} with {} connecting", sessionKey, username);
+
+        packetEvent.getAsyncMarker().incrementProcessingDelay();
+        Runnable nameCheckTask = new NameCheckTask(
+                plugin, random, player, packetEvent, username, clientKey.orElse(null), keyPair.getPublic()
+        );
+        plugin.getScheduler().runAsync(nameCheckTask);
+    }
+
+    private boolean verifyPublicKey(ClientPublicKey clientKey, UUID sessionPremiumUUID) {
+        try {
+            return EncryptionUtil.verifyClientKey(clientKey, Instant.now(), sessionPremiumUUID);
+        } catch (SignatureException | InvalidKeyException | NoSuchAlgorithmException ex) {
+            return false;
+        }
+    }
+
+    private String getUsername(PacketContainer packet) {
+        WrappedGameProfile profile = packet.getGameProfiles().readSafely(0);
+        if (profile == null) {
+            return packet.getStrings().read(0);
+        }
+
+        //player.getName() won't work at this state
+        return profile.getName();
+    }
+
+    private static PlayerInjectionHandler getHandler() {
+        PacketFilterManager manager = (PacketFilterManager) ProtocolLibrary.getProtocolManager();
+        FieldAccessor accessor = Accessors.getFieldAccessor(manager.getClass(), PlayerInjectionHandler.class, true);
+        return (PlayerInjectionHandler) accessor.get(manager);
+    }
+
+    private FloodgatePlayer getFloodgatePlayer(Player player) {
+        Channel channel = handler.getChannel(player);
+        AttributeKey<FloodgatePlayer> floodgateAttribute = AttributeKey.valueOf("floodgate-player");
+        return channel.attr(floodgateAttribute).get();
+    }
+
+    /**
+     * Reimplementation of the tasks injected Floodgate in ProtocolLib that are not run due to a bug
+     * @see <a href="https://github.com/GeyserMC/Floodgate/issues/143">Issue Floodgate#143</a>
+     * @see <a href="https://github.com/GeyserMC/Floodgate/blob/5d5713ed9e9eeab0f4abdaa9cf5cd8619dc1909b/spigot/src/main/java/org/geysermc/floodgate/addon/data/SpigotDataHandler.java#L121-L175">Floodgate/SpigotDataHandler</a>
+     * @param packetEvent the PacketEvent that won't be processed by Floodgate
+     * @return false if the player was kicked
+     */
+    private boolean processFloodgateTasks(PacketEvent packetEvent) {
+        PacketContainer packet = packetEvent.getPacket();
+        Player player = packetEvent.getPlayer();
+        FloodgatePlayer floodgatePlayer = getFloodgatePlayer(player);
+        if (floodgatePlayer == null) {
+            return true;
+        }
+
+        // kick the player, if necessary
+        Channel channel = handler.getChannel(packetEvent.getPlayer());
+        AttributeKey<String> kickMessageAttribute = AttributeKey.valueOf("floodgate-kick-message");
+        String kickMessage = channel.attr(kickMessageAttribute).get();
+        if (kickMessage != null) {
+            player.kickPlayer(kickMessage);
+            return false;
+        }
+
+        // add prefix
+        String username = floodgatePlayer.getCorrectUsername();
+        if (packet.getGameProfiles().size() > 0) {
+            packet.getGameProfiles().write(0,
+                    new WrappedGameProfile(floodgatePlayer.getCorrectUniqueId(), username));
+        } else {
+            packet.getStrings().write(0, username);
+        }
+
+        // remove real Floodgate data handler
+        ChannelHandler floodgateHandler = channel.pipeline().get("floodgate_data_handler");
+        channel.pipeline().remove(floodgateHandler);
+
+        return true;
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibLoginSource.java

@@ -0,0 +1,135 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.ProtocolManager;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.reflect.StructureModifier;
+import com.comphenix.protocol.wrappers.WrappedChatComponent;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.github.games647.fastlogin.core.shared.LoginSource;
+import org.bukkit.entity.Player;
+
+import java.net.InetSocketAddress;
+import java.security.PublicKey;
+import java.util.Arrays;
+import java.util.Random;
+
+import static com.comphenix.protocol.PacketType.Login.Server.DISCONNECT;
+import static com.comphenix.protocol.PacketType.Login.Server.ENCRYPTION_BEGIN;
+
+class ProtocolLibLoginSource implements LoginSource {
+
+    private final Player player;
+
+    private final Random random;
+
+    private final ClientPublicKey clientKey;
+    private final PublicKey publicKey;
+
+    private final String serverId = "";
+    private byte[] verifyToken;
+
+    ProtocolLibLoginSource(Player player, Random random, PublicKey serverPublicKey, ClientPublicKey clientKey) {
+        this.player = player;
+        this.random = random;
+        this.publicKey = serverPublicKey;
+        this.clientKey = clientKey;
+    }
+
+    @Override
+    public void enableOnlinemode() {
+        verifyToken = EncryptionUtil.generateVerifyToken(random);
+
+        /*
+         * Packet Information: https://wiki.vg/Protocol#Encryption_Request
+         *
+         * ServerID="" (String) key=public server key verifyToken=random 4 byte array
+         */
+        PacketContainer newPacket = new PacketContainer(ENCRYPTION_BEGIN);
+
+        newPacket.getStrings().write(0, serverId);
+        StructureModifier<PublicKey> keyModifier = newPacket.getSpecificModifier(PublicKey.class);
+        int verifyField = 0;
+        if (keyModifier.getFields().isEmpty()) {
+            // Since 1.16.4 this is now a byte field
+            newPacket.getByteArrays().write(0, publicKey.getEncoded());
+            verifyField++;
+        } else {
+            keyModifier.write(0, publicKey);
+        }
+
+        newPacket.getByteArrays().write(verifyField, verifyToken);
+
+        //serverId is an empty string
+        ProtocolLibrary.getProtocolManager().sendServerPacket(player, newPacket);
+    }
+
+    @Override
+    public void kick(String message) {
+        ProtocolManager protocolManager = ProtocolLibrary.getProtocolManager();
+
+        PacketContainer kickPacket = new PacketContainer(DISCONNECT);
+        kickPacket.getChatComponents().write(0, WrappedChatComponent.fromText(message));
+
+        try {
+            //send kick packet at login state
+            //the normal event.getPlayer.kickPlayer(String) method does only work at play state
+            protocolManager.sendServerPacket(player, kickPacket);
+        } finally {
+            //tell the server that we want to close the connection
+            player.kickPlayer("Disconnect");
+        }
+    }
+
+    @Override
+    public InetSocketAddress getAddress() {
+        return player.getAddress();
+    }
+
+    public ClientPublicKey getClientKey() {
+        return clientKey;
+    }
+
+    public String getServerId() {
+        return serverId;
+    }
+
+    public byte[] getVerifyToken() {
+        return verifyToken.clone();
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getSimpleName() + '{'
+            + "player=" + player
+            + ", random=" + random
+            + ", serverId='" + serverId + '\''
+            + ", verifyToken=" + Arrays.toString(verifyToken)
+            + '}';
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/SkinApplyListener.java

@@ -0,0 +1,73 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.comphenix.protocol.wrappers.WrappedGameProfile;
+import com.comphenix.protocol.wrappers.WrappedSignedProperty;
+import com.github.games647.craftapi.model.skin.Textures;
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerLoginEvent;
+import org.bukkit.event.player.PlayerLoginEvent.Result;
+
+public class SkinApplyListener implements Listener {
+
+    private final FastLoginBukkit plugin;
+
+    public SkinApplyListener(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @EventHandler(priority = EventPriority.LOW)
+    //run this on the loginEvent to let skins plugins see the skin like in normal Minecraft behaviour
+    public void onPlayerLogin(PlayerLoginEvent loginEvent) {
+        if (loginEvent.getResult() != Result.ALLOWED) {
+            return;
+        }
+
+        Player player = loginEvent.getPlayer();
+
+        //go through every session, because player.getAddress is null
+        //loginEvent.getAddress is just a InetAddress not InetSocketAddress, so not unique enough
+        for (BukkitLoginSession session : plugin.getLoginSessions().values()) {
+            if (session.getUsername().equals(player.getName())) {
+                session.getSkin().ifPresent(skin -> applySkin(player, skin.getValue(), skin.getSignature()));
+                break;
+            }
+        }
+    }
+
+    private void applySkin(Player player, String skinData, String signature) {
+        WrappedGameProfile gameProfile = WrappedGameProfile.fromPlayer(player);
+
+        WrappedSignedProperty skin = WrappedSignedProperty.fromValues(Textures.KEY, skinData, signature);
+        gameProfile.getProperties().put(Textures.KEY, skin);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/VerifyResponseTask.java

@@ -0,0 +1,330 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.injector.packet.PacketRegistry;
+import com.comphenix.protocol.injector.temporary.TemporaryPlayerFactory;
+import com.comphenix.protocol.reflect.EquivalentConverter;
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.ConstructorAccessor;
+import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import com.comphenix.protocol.utility.MinecraftVersion;
+import com.comphenix.protocol.wrappers.BukkitConverters;
+import com.comphenix.protocol.wrappers.Converters;
+import com.comphenix.protocol.wrappers.WrappedChatComponent;
+import com.comphenix.protocol.wrappers.WrappedGameProfile;
+import com.comphenix.protocol.wrappers.WrappedProfilePublicKey.WrappedProfileKeyData;
+import com.github.games647.craftapi.model.auth.Verification;
+import com.github.games647.craftapi.model.skin.SkinProperty;
+import com.github.games647.craftapi.resolver.MojangResolver;
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.InetUtils;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import lombok.val;
+import org.bukkit.entity.Player;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.security.GeneralSecurityException;
+import java.security.Key;
+import java.security.KeyPair;
+import java.security.PrivateKey;
+import java.util.Arrays;
+import java.util.Optional;
+import java.util.UUID;
+
+import static com.comphenix.protocol.PacketType.Login.Client.START;
+import static com.comphenix.protocol.PacketType.Login.Server.DISCONNECT;
+
+public class VerifyResponseTask implements Runnable {
+
+    private static final String ENCRYPTION_CLASS_NAME = "MinecraftEncryption";
+    private static final Class<?> ENCRYPTION_CLASS;
+    private static final String ADDRESS_VERIFY_WARNING = "This indicates the use of reverse-proxy like HAProxy, "
+            + "TCPShield, BungeeCord, Velocity, etc. "
+            + "By default (configurable in the config) this plugin requests Mojang to verify the connecting IP "
+            + "to this server with the one used to log into Minecraft to prevent MITM attacks. In "
+            + "order to work this security feature, the actual client IP needs to be forwarding "
+            + "(keyword IP forwarding). This process will also be useful for other server "
+            + "features like IP banning, so that it doesn't ban the proxy IP.";
+
+    static {
+        ENCRYPTION_CLASS = MinecraftReflection.getMinecraftClass(
+                "util." + ENCRYPTION_CLASS_NAME, ENCRYPTION_CLASS_NAME
+        );
+    }
+
+    private final FastLoginBukkit plugin;
+    private final PacketEvent packetEvent;
+    private final KeyPair serverKey;
+
+    private final Player player;
+
+    private final BukkitLoginSession session;
+
+    private final byte[] sharedSecret;
+
+    private static Method encryptMethod;
+    private static Method cipherMethod;
+
+    public VerifyResponseTask(FastLoginBukkit plugin, PacketEvent packetEvent,
+                              Player player, BukkitLoginSession session,
+                              byte[] sharedSecret, KeyPair keyPair) {
+        this.plugin = plugin;
+        this.packetEvent = packetEvent;
+        this.player = player;
+        this.session = session;
+        this.sharedSecret = Arrays.copyOf(sharedSecret, sharedSecret.length);
+        this.serverKey = keyPair;
+    }
+
+    @Override
+    public void run() {
+        try {
+            verifyResponse(session);
+        } finally {
+            //this is a fake packet; it shouldn't be sent to the server
+            synchronized (packetEvent.getAsyncMarker().getProcessingLock()) {
+                packetEvent.setCancelled(true);
+            }
+
+            ProtocolLibrary.getProtocolManager().getAsynchronousManager().signalPacketTransmission(packetEvent);
+        }
+    }
+
+    private void verifyResponse(BukkitLoginSession session) {
+        PrivateKey privateKey = serverKey.getPrivate();
+
+        SecretKey loginKey;
+        try {
+            loginKey = EncryptionUtil.decryptSharedKey(privateKey, sharedSecret);
+        } catch (GeneralSecurityException securityEx) {
+            disconnect("error-kick", "Cannot decrypt received contents", securityEx);
+            return;
+        }
+
+        try {
+            if (!enableEncryption(loginKey)) {
+                return;
+            }
+        } catch (Exception ex) {
+            disconnect("error-kick", "Cannot decrypt received contents", ex);
+            return;
+        }
+
+        String serverId = EncryptionUtil.getServerIdHashString("", loginKey, serverKey.getPublic());
+
+        String requestedUsername = session.getRequestUsername();
+        InetSocketAddress socketAddress = player.getAddress();
+        try {
+            MojangResolver resolver = plugin.getCore().getResolver();
+            InetAddress address = socketAddress.getAddress();
+            Optional<Verification> response = resolver.hasJoined(requestedUsername, serverId, address);
+            if (response.isPresent()) {
+                encryptConnection(session, requestedUsername, response.get());
+            } else {
+                //user tried to fake an authentication
+                disconnect(
+                        "invalid-session",
+                        "Session server rejected incoming connection for GameProfile {} ({}). Possible reasons are"
+                                + "1) Client IP address contacting Mojang and server during server join were different "
+                                + "(Do you use a reverse proxy? -> Enable IP forwarding, "
+                                + "or disable the feature in the config). "
+                                + "2) Player is offline, but tried to bypass the authentication"
+                                + "3) Client uses an outdated username for connecting (Fix: Restart client)",
+                        requestedUsername, address
+                );
+
+                if (InetUtils.isLocalAddress(address)) {
+                    plugin.getLog().warn(
+                            "The incoming request for player {} uses a local IP address",
+                            requestedUsername
+                    );
+                    plugin.getLog().warn(ADDRESS_VERIFY_WARNING);
+                } else {
+                    plugin.getLog().warn("If you think this is an error, please verify that the incoming "
+                            + "IP address {} is not associated with a server hosting company.", address);
+                    plugin.getLog().warn(ADDRESS_VERIFY_WARNING);
+                }
+            }
+        } catch (IOException ioEx) {
+            disconnect("error-kick", "Failed to connect to session server", ioEx);
+        }
+    }
+
+    private void encryptConnection(BukkitLoginSession session, String requestedUsername, Verification verification) {
+        plugin.getLog().info("Profile {} has a verified premium account", requestedUsername);
+        String realUsername = verification.getName();
+        if (realUsername == null) {
+            disconnect("invalid-session", "Username field null for {}", requestedUsername);
+            return;
+        }
+
+        SkinProperty[] properties = verification.getProperties();
+        if (properties.length > 0) {
+            session.setSkinProperty(properties[0]);
+        }
+
+        session.setVerifiedUsername(realUsername);
+        session.setUuid(verification.getId());
+        session.setVerified(true);
+
+        setPremiumUUID(session.getUuid());
+        receiveFakeStartPacket(realUsername, session.getClientPublicKey(), session.getUuid());
+    }
+
+    private void setPremiumUUID(UUID premiumUUID) {
+        if (plugin.getConfig().getBoolean("premiumUuid") && premiumUUID != null) {
+            try {
+                Object networkManager = getNetworkManager();
+                //https://github.com/bergerkiller/CraftSource/blob/master/net.minecraft.server/NetworkManager.java#L69
+
+                Class<?> managerClass = networkManager.getClass();
+                FieldAccessor accessor = Accessors.getFieldAccessorOrNull(managerClass, "spoofedUUID", UUID.class);
+                accessor.set(networkManager, premiumUUID);
+            } catch (Exception exc) {
+                plugin.getLog().error("Error setting premium uuid of {}", player, exc);
+            }
+        }
+    }
+
+    //try to get the networkManager from ProtocolLib
+    private Object getNetworkManager() throws ClassNotFoundException {
+        Object injectorContainer = TemporaryPlayerFactory.getInjectorFromPlayer(player);
+
+        // ChannelInjector
+        Class<?> injectorClass = Class.forName("com.comphenix.protocol.injector.netty.Injector");
+        Object rawInjector = FuzzyReflection.getFieldValue(injectorContainer, injectorClass, true);
+
+        Class<?> rawInjectorClass = rawInjector.getClass();
+        FieldAccessor accessor = Accessors.getFieldAccessorOrNull(rawInjectorClass, "networkManager", Object.class);
+        return accessor.get(rawInjector);
+    }
+
+    private boolean enableEncryption(SecretKey loginKey) throws IllegalArgumentException {
+        plugin.getLog().info("Enabling onlinemode encryption for {}", player.getAddress());
+        // Initialize method reflections
+        if (encryptMethod == null) {
+            Class<?> networkManagerClass = MinecraftReflection.getNetworkManagerClass();
+
+            try {
+                // Try to get the old (pre MC 1.16.4) encryption method
+                encryptMethod = FuzzyReflection.fromClass(networkManagerClass)
+                        .getMethodByParameters("a", SecretKey.class);
+            } catch (IllegalArgumentException exception) {
+                // Get the new encryption method
+                encryptMethod = FuzzyReflection.fromClass(networkManagerClass)
+                        .getMethodByParameters("a", Cipher.class, Cipher.class);
+
+                // Get the needed Cipher helper method (used to generate ciphers from login key)
+                cipherMethod = FuzzyReflection.fromClass(ENCRYPTION_CLASS)
+                        .getMethodByParameters("a", int.class, Key.class);
+            }
+        }
+
+        try {
+            Object networkManager = this.getNetworkManager();
+
+            // If cipherMethod is null - use old encryption (pre MC 1.16.4), otherwise use the new cipher one
+            if (cipherMethod == null) {
+                // Encrypt/decrypt packet flow, this behaviour is expected by the client
+                encryptMethod.invoke(networkManager, loginKey);
+            } else {
+                // Create ciphers from login key
+                Object decryptionCipher = cipherMethod.invoke(null, Cipher.DECRYPT_MODE, loginKey);
+                Object encryptionCipher = cipherMethod.invoke(null, Cipher.ENCRYPT_MODE, loginKey);
+
+                // Encrypt/decrypt packet flow, this behaviour is expected by the client
+                encryptMethod.invoke(networkManager, decryptionCipher, encryptionCipher);
+            }
+        } catch (Exception ex) {
+            disconnect("error-kick", "Couldn't enable encryption", ex);
+            return false;
+        }
+
+        return true;
+    }
+
+    private void disconnect(String reasonKey, String logMessage, Object... arguments) {
+        plugin.getLog().error(logMessage, arguments);
+        kickPlayer(plugin.getCore().getMessage(reasonKey));
+    }
+
+    private void kickPlayer(String reason) {
+        PacketContainer kickPacket = new PacketContainer(DISCONNECT);
+        kickPacket.getChatComponents().write(0, WrappedChatComponent.fromText(reason));
+        //send kick packet at login state
+        //the normal event.getPlayer.kickPlayer(String) method does only work at play state
+        ProtocolLibrary.getProtocolManager().sendServerPacket(player, kickPacket);
+        //tell the server that we want to close the connection
+        player.kickPlayer("Disconnect");
+    }
+
+    //fake a new login packet in order to let the server handle all the other stuff
+    private void receiveFakeStartPacket(String username, ClientPublicKey clientKey, UUID uuid) {
+        PacketContainer startPacket;
+        if (new MinecraftVersion(1, 20, 2).atOrAbove()) {
+            startPacket = new PacketContainer(START);
+            startPacket.getStrings().write(0, username);
+            startPacket.getUUIDs().write(0, uuid);
+        } else if (new MinecraftVersion(1, 19, 3).atOrAbove()) {
+            startPacket = new PacketContainer(START);
+            startPacket.getStrings().write(0, username);
+            startPacket.getOptionals(Converters.passthrough(UUID.class)).write(0, Optional.of(uuid));
+        } else if (new MinecraftVersion(1, 19, 0).atOrAbove()) {
+            startPacket = new PacketContainer(START);
+            startPacket.getStrings().write(0, username);
+
+            EquivalentConverter<WrappedProfileKeyData> converter = BukkitConverters.getWrappedPublicKeyDataConverter();
+            val wrappedKey = Optional.ofNullable(clientKey).map(key ->
+                    new WrappedProfileKeyData(clientKey.expiry(), clientKey.key(), clientKey.signature())
+            );
+
+            startPacket.getOptionals(converter).write(0, wrappedKey);
+        } else {
+            //uuid is ignored by the packet definition
+            WrappedGameProfile fakeProfile = new WrappedGameProfile(UUID.randomUUID(), username);
+
+            Class<?> profileHandleType = fakeProfile.getHandleType();
+            Class<?> packetHandleType = PacketRegistry.getPacketClassFromType(START);
+            ConstructorAccessor startCons = Accessors.getConstructorAccessorOrNull(packetHandleType, profileHandleType);
+            startPacket = new PacketContainer(START, startCons.invoke(fakeProfile.getHandle()));
+        }
+
+        //we don't want to handle our own packets so ignore filters
+        ProtocolLibrary.getProtocolManager().receiveClientPacket(player, startPacket, false);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/packet/ClientPublicKey.java

@@ -0,0 +1,55 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib.packet;
+
+import lombok.Value;
+import lombok.experimental.Accessors;
+
+import java.security.PublicKey;
+import java.time.Instant;
+import java.util.Base64;
+import java.util.StringJoiner;
+
+@Accessors(fluent = true)
+@Value(staticConstructor = "of")
+public class ClientPublicKey {
+    Instant expiry;
+    PublicKey key;
+    byte[] signature;
+
+    public boolean isExpired(Instant verifyTimestamp) {
+        return !verifyTimestamp.isBefore(expiry);
+    }
+
+    @Override
+    public String toString() {
+        return new StringJoiner(", ", ClientPublicKey.class.getSimpleName() + '[', "]")
+                .add("expiry=" + expiry)
+                .add("key=" + Base64.getEncoder().encodeToString(key.getEncoded()))
+                .add("signature=" + Base64.getEncoder().encodeToString(signature))
+                .toString();
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocolsupport/ProtocolLoginSource.java

@@ -0,0 +1,66 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocolsupport;
+
+import com.github.games647.fastlogin.core.shared.LoginSource;
+import protocolsupport.api.events.PlayerLoginStartEvent;
+
+import java.net.InetSocketAddress;
+
+public class ProtocolLoginSource implements LoginSource {
+
+    private final PlayerLoginStartEvent loginStartEvent;
+
+    public ProtocolLoginSource(PlayerLoginStartEvent loginStartEvent) {
+        this.loginStartEvent = loginStartEvent;
+    }
+
+    @Override
+    public void enableOnlinemode() {
+        loginStartEvent.setOnlineMode(true);
+    }
+
+    @Override
+    public void kick(String message) {
+        loginStartEvent.denyLogin(message);
+    }
+
+    @Override
+    public InetSocketAddress getAddress() {
+        return loginStartEvent.getConnection().getRawAddress();
+    }
+
+    public PlayerLoginStartEvent getLoginStartEvent() {
+        return loginStartEvent;
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getSimpleName() + '{'
+            + "loginStartEvent=" + loginStartEvent
+            + '}';
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocolsupport/ProtocolSupportListener.java

@@ -0,0 +1,139 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocolsupport;
+
+import com.github.games647.craftapi.UUIDAdapter;
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.event.BukkitFastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.antibot.AntiBotService;
+import com.github.games647.fastlogin.core.antibot.AntiBotService.Action;
+import com.github.games647.fastlogin.core.shared.JoinManagement;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import protocolsupport.api.events.ConnectionCloseEvent;
+import protocolsupport.api.events.PlayerLoginStartEvent;
+import protocolsupport.api.events.PlayerProfileCompleteEvent;
+
+import java.net.InetSocketAddress;
+import java.util.Optional;
+
+public class ProtocolSupportListener extends JoinManagement<Player, CommandSender, ProtocolLoginSource>
+        implements Listener {
+
+    private final FastLoginBukkit plugin;
+    private final AntiBotService antiBotService;
+
+    public ProtocolSupportListener(FastLoginBukkit plugin, AntiBotService antiBotService) {
+        super(plugin.getCore(), plugin.getCore().getAuthPluginHook(), plugin.getBedrockService());
+
+        this.plugin = plugin;
+        this.antiBotService = antiBotService;
+    }
+
+    @EventHandler
+    public void onLoginStart(PlayerLoginStartEvent loginStartEvent) {
+        if (loginStartEvent.isLoginDenied() || plugin.getCore().getAuthPluginHook() == null) {
+            return;
+        }
+
+        String username = loginStartEvent.getConnection().getProfile().getName();
+        InetSocketAddress address = loginStartEvent.getConnection().getRawAddress();
+        plugin.getLog().info("Incoming login request for {} from {}", username, address);
+
+        Action action = antiBotService.onIncomingConnection(address, username);
+        switch (action) {
+            case Ignore:
+                // just ignore
+                return;
+            case Block:
+                String message = plugin.getCore().getMessage("kick-antibot");
+                loginStartEvent.denyLogin(message);
+                break;
+            case Continue:
+            default:
+                //remove old data every time on a new login in order to keep the session only for one person
+                plugin.removeSession(address);
+
+                ProtocolLoginSource source = new ProtocolLoginSource(loginStartEvent);
+                super.onLogin(username, source);
+                break;
+        }
+    }
+
+    @EventHandler
+    public void onConnectionClosed(ConnectionCloseEvent closeEvent) {
+        InetSocketAddress address = closeEvent.getConnection().getRawAddress();
+        plugin.removeSession(address);
+    }
+
+    @EventHandler
+    public void onPropertiesResolve(PlayerProfileCompleteEvent profileCompleteEvent) {
+        InetSocketAddress address = profileCompleteEvent.getConnection().getRawAddress();
+
+        BukkitLoginSession session = plugin.getSession(address);
+
+        if (session != null && profileCompleteEvent.getConnection().getProfile().isOnlineMode()) {
+            session.setVerified(true);
+
+            if (!plugin.getConfig().getBoolean("premiumUuid")) {
+                String username = Optional.ofNullable(profileCompleteEvent.getForcedName())
+                        .orElse(profileCompleteEvent.getConnection().getProfile().getName());
+                profileCompleteEvent.setForcedUUID(UUIDAdapter.generateOfflineId(username));
+            }
+        }
+    }
+
+    @Override
+    public FastLoginPreLoginEvent callFastLoginPreLoginEvent(String username, ProtocolLoginSource source,
+                                                             StoredProfile profile) {
+        BukkitFastLoginPreLoginEvent event = new BukkitFastLoginPreLoginEvent(username, source, profile);
+        plugin.getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
+    @Override
+    public void requestPremiumLogin(ProtocolLoginSource source, StoredProfile profile, String username,
+                                    boolean registered) {
+        source.enableOnlinemode();
+
+        String ip = source.getAddress().getAddress().getHostAddress();
+        plugin.getCore().getPendingLogin().put(ip + username, new Object());
+
+        BukkitLoginSession playerSession = new BukkitLoginSession(username, registered, profile);
+        plugin.putSession(source.getAddress(), playerSession);
+    }
+
+    @Override
+    public void startCrackedSession(ProtocolLoginSource source, StoredProfile profile, String username) {
+        BukkitLoginSession loginSession = new BukkitLoginSession(username, profile);
+        plugin.putSession(source.getAddress(), loginSession);
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/DelayedAuthHook.java

@@ -0,0 +1,124 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.task;
+
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.hook.AuthMeHook;
+import com.github.games647.fastlogin.bukkit.hook.CrazyLoginHook;
+import com.github.games647.fastlogin.bukkit.hook.LogItHook;
+import com.github.games647.fastlogin.bukkit.hook.LoginSecurityHook;
+import com.github.games647.fastlogin.bukkit.hook.UltraAuthHook;
+import com.github.games647.fastlogin.bukkit.hook.XAuthHook;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+
+import java.lang.reflect.Constructor;
+import java.util.Arrays;
+import java.util.List;
+
+public class DelayedAuthHook implements Runnable {
+
+    private final FastLoginBukkit plugin;
+
+    public DelayedAuthHook(FastLoginBukkit plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public void run() {
+        boolean hookFound = isHookFound();
+        if (plugin.getBungeeManager().isEnabled()) {
+            plugin.getLog().info("BungeeCord setting detected. No auth plugin is required");
+        } else if (!hookFound) {
+            plugin.getLog().warn("No auth plugin were found by this plugin "
+                    + "(other plugins could hook into this after the initialization of this plugin)"
+                    + "and BungeeCord is deactivated. "
+                    + "Either one or both of the checks have to pass in order to use this plugin");
+        }
+
+        if (hookFound) {
+            plugin.markInitialized();
+        }
+    }
+
+    private boolean isHookFound() {
+        return plugin.getCore().getAuthPluginHook() != null || registerHooks();
+    }
+
+    private boolean registerHooks() {
+        AuthPlugin<Player> authPluginHook = getAuthHook();
+        if (authPluginHook == null) {
+            //run this check for exceptions (errors) and not found plugins
+            plugin.getLog().warn("No support offline Auth plugin found. ");
+            return false;
+        }
+
+        if (authPluginHook instanceof Listener) {
+            Bukkit.getPluginManager().registerEvents((Listener) authPluginHook, plugin);
+        }
+
+        if (plugin.getCore().getAuthPluginHook() == null) {
+            plugin.getLog().info("Hooking into auth plugin: {}", authPluginHook.getClass().getSimpleName());
+            plugin.getCore().setAuthPluginHook(authPluginHook);
+        }
+
+        return true;
+    }
+
+    private AuthPlugin<Player> getAuthHook() {
+        try {
+            List<Class<? extends AuthPlugin<Player>>> hooks = Arrays.asList(AuthMeHook.class,
+                    CrazyLoginHook.class, LogItHook.class, LoginSecurityHook.class, UltraAuthHook.class,
+                    XAuthHook.class);
+
+            for (Class<? extends AuthPlugin<Player>> clazz : hooks) {
+                String pluginName = clazz.getSimpleName();
+                pluginName = pluginName.substring(0, pluginName.length() - "Hook".length());
+                //uses only member classes which uses AuthPlugin interface (skip interfaces)
+                if (Bukkit.getPluginManager().isPluginEnabled(pluginName)) {
+                    //check only for enabled plugins. A single plugin could be disabled by plugin managers
+                    return newInstance(clazz);
+                }
+            }
+        } catch (ReflectiveOperationException ex) {
+            plugin.getLog().error("Couldn't load the auth hook class", ex);
+        }
+
+        return null;
+    }
+
+    protected AuthPlugin<Player> newInstance(Class<? extends AuthPlugin<Player>> clazz)
+            throws ReflectiveOperationException {
+        try {
+            Constructor<? extends AuthPlugin<Player>> cons = clazz.getDeclaredConstructor(FastLoginBukkit.class);
+            return cons.newInstance(plugin);
+        } catch (NoSuchMethodException noMethodEx) {
+            return clazz.getDeclaredConstructor().newInstance();
+        }
+    }
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/FloodgateAuthTask.java

@@ -0,0 +1,71 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.task;
+
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.FloodgateManagement;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.geysermc.floodgate.api.player.FloodgatePlayer;
+
+import java.net.InetSocketAddress;
+import java.util.UUID;
+
+public class FloodgateAuthTask extends FloodgateManagement<Player, CommandSender, BukkitLoginSession, FastLoginBukkit> {
+
+    public FloodgateAuthTask(FastLoginCore<Player, CommandSender, FastLoginBukkit> core, Player player,
+                             FloodgatePlayer floodgatePlayer) {
+        super(core, player, floodgatePlayer);
+    }
+
+    @Override
+    protected void startLogin() {
+        BukkitLoginSession session = new BukkitLoginSession(player.getName(), isRegistered, profile);
+
+        // enable auto login based on the value of 'autoLoginFloodgate' in config.yml
+        session.setVerified(isAutoAuthAllowed(autoLoginFloodgate));
+
+        // run login task
+        Runnable forceLoginTask = new ForceLoginTask(core.getPlugin().getCore(), player, session);
+        Bukkit.getScheduler().runTaskAsynchronously(core.getPlugin(), forceLoginTask);
+    }
+
+    protected String getName(Player player) {
+        return player.getName();
+    }
+
+    protected UUID getUUID(Player player) {
+        return player.getUniqueId();
+    }
+
+    protected InetSocketAddress getAddress(Player player) {
+        return player.getAddress();
+    }
+
+}

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/task/ForceLoginTask.java

@@ -0,0 +1,108 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.task;
+
+import com.github.games647.fastlogin.bukkit.BukkitLoginSession;
+import com.github.games647.fastlogin.bukkit.FastLoginBukkit;
+import com.github.games647.fastlogin.bukkit.event.BukkitFastLoginAutoLoginEvent;
+import com.github.games647.fastlogin.core.PremiumStatus;
+import com.github.games647.fastlogin.core.message.SuccessMessage;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.ForceLoginManagement;
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.shared.event.FastLoginAutoLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.metadata.FixedMetadataValue;
+
+import java.util.concurrent.ExecutionException;
+
+public class ForceLoginTask extends ForceLoginManagement<Player, CommandSender, BukkitLoginSession, FastLoginBukkit> {
+
+    public ForceLoginTask(FastLoginCore<Player, CommandSender, FastLoginBukkit> core, Player player,
+                          BukkitLoginSession session) {
+        super(core, player, session);
+    }
+
+    @Override
+    public void run() {
+        // block this target player for BungeeCord ID brute force attacks
+        FastLoginBukkit plugin = core.getPlugin();
+        player.setMetadata(core.getPlugin().getName(), new FixedMetadataValue(plugin, true));
+
+        if (session != null && !session.getUsername().equals(player.getName())) {
+            String playerName = player.getName();
+            plugin.getLog().warn("Player username {} is not matching session {}", playerName, session.getUsername());
+            return;
+        }
+
+        super.run();
+
+        PremiumStatus status = PremiumStatus.CRACKED;
+        if (isOnlineMode()) {
+            status = PremiumStatus.PREMIUM;
+        }
+
+        plugin.getPremiumPlayers().put(player.getUniqueId(), status);
+    }
+
+    @Override
+    public FastLoginAutoLoginEvent callFastLoginAutoLoginEvent(LoginSession session, StoredProfile profile) {
+        BukkitFastLoginAutoLoginEvent event = new BukkitFastLoginAutoLoginEvent(session, profile);
+        core.getPlugin().getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
+    @Override
+    public void onForceActionSuccess(LoginSession session) {
+        if (core.getPlugin().getBungeeManager().isEnabled()) {
+            core.getPlugin().getBungeeManager().sendPluginMessage(player, new SuccessMessage());
+        }
+    }
+
+    @Override
+    public String getName(Player player) {
+        return player.getName();
+    }
+
+    @Override
+    public boolean isOnline(Player player) {
+        try {
+            //the player-list isn't thread-safe
+            return Bukkit.getScheduler().callSyncMethod(core.getPlugin(), player::isOnline).get();
+        } catch (InterruptedException | ExecutionException ex) {
+            core.getPlugin().getLog().error("Failed to perform thread-safe online check for {}", player, ex);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean isOnlineMode() {
+        return session.isVerified();
+    }
+}

bukkit/src/main/resources/plugin.yml

@@ -0,0 +1,65 @@
+# project data for Bukkit in order to register our plugin with all it's components
+# ${-} are variables from Maven (pom.xml) which will be replaced after the build
+name: ${project.parent.name}
+version: ${project.version}-${git.commit.id.abbrev}
+main: ${project.groupId}.${project.artifactId}.${project.name}
+
+# meta data for plugin managers
+authors: [games647, 'https://github.com/games647/FastLogin/graphs/contributors']
+description: |
+    ${project.description}
+website: ${project.url}
+dev-url: ${project.url}
+
+# This plugin doesn't have to be transformed for compatibility with Minecraft >= 1.13
+api-version: '1.13'
+
+softdepend:
+    # We depend on either ProtocolLib or ProtocolSupport
+    - ProtocolSupport
+    - ProtocolLib
+    # Premium variable
+    - PlaceholderAPI
+    # Bedrock Player Bridge
+    - Geyser-Spigot
+    - floodgate
+    # Auth plugins
+    - AuthMe
+    - LoginSecurity
+    - SodionAuth
+    - xAuth
+    - LogIt
+    - UltraAuth
+    - CrazyLogin
+
+commands:
+    ${project.parent.name}:
+        description: 'Label the invoker as premium'
+        aliases: [prem, premium, loginfast]
+        usage: /<command> [player]
+        permission: ${project.artifactId}.command.premium
+
+    cracked:
+        description: 'Label the invoker or the player specified as cracked if marked premium before'
+        aliases: [unpremium]
+        usage: /<command> [player]
+        permission: ${project.artifactId}.command.cracked
+
+permissions:
+    ${project.artifactId}.command.premium:
+        description: 'Label themselves as premium'
+        default: true
+
+    ${project.artifactId}.command.premium.other:
+        description: 'Label others as premium'
+        children:
+            ${project.artifactId}.command.premium: true
+
+    ${project.artifactId}.command.cracked:
+        description: 'Label themselves as cracked'
+        default: true
+
+    ${project.artifactId}.command.cracked.other:
+        description: 'Label others as cracked'
+        children:
+            ${project.artifactId}.command.cracked: true

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/FastLoginBukkitTest.java

@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import com.github.games647.fastlogin.core.CommonUtil;
+import lombok.val;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class FastLoginBukkitTest {
+
+    @Test
+    void testRGB() {
+        val message = "&x00002a00002b&lText";
+        val msg = CommonUtil.translateColorCodes(message);
+        assertEquals(msg, "§x00002a00002b§lText");
+
+        val components = TextComponent.fromLegacyText(msg);
+        val expected = "{\"bold\":true,\"color\":\"#00a00b\",\"text\":\"Text\"}";
+        assertEquals(ComponentSerializer.toString(components), expected);
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/ReflectionTest.java

@@ -0,0 +1,43 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit;
+
+import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import fr.xephi.authme.api.v3.AuthMeApi;
+import fr.xephi.authme.process.Management;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class ReflectionTest {
+
+    @Test
+    void testAuthMeManagementField() {
+        FieldAccessor accessor = Accessors.getFieldAccessor(AuthMeApi.class, Management.class, true);
+        assertNotNull(accessor.getField());
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/hook/CrazyLoginHookTest.java

@@ -0,0 +1,44 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.hook;
+
+import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import de.st_ddt.crazylogin.CrazyLogin;
+import de.st_ddt.crazylogin.listener.PlayerListener;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class CrazyLoginHookTest {
+
+    @Test
+    void testPlayerListener() {
+        FieldAccessor accessor = Accessors.getFieldAccessor(CrazyLogin.class, PlayerListener.class, true);
+        assertNotNull(accessor.getField());
+    }
+
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/listener/protocollib/Base64Adapter.java

@@ -0,0 +1,49 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import lombok.val;
+
+import java.io.IOException;
+import java.util.Base64;
+
+public class Base64Adapter extends TypeAdapter<byte[]> {
+
+    @Override
+    public void write(JsonWriter out, byte[] value) throws IOException {
+        val encoded = Base64.getEncoder().encodeToString(value);
+        out.value(encoded);
+    }
+
+    @Override
+    public byte[] read(JsonReader in) throws IOException {
+        String encoded = in.nextString();
+        return Base64.getDecoder().decode(encoded);
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/listener/protocollib/EncryptionUtilTest.java

@@ -0,0 +1,298 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.github.games647.fastlogin.bukkit.listener.protocollib.SignatureTestData.SignatureData;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.google.common.hash.Hashing;
+import lombok.val;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.GeneralSecurityException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+import java.security.PublicKey;
+import java.security.SignatureException;
+import java.security.interfaces.RSAPublicKey;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.UUID;
+import java.util.concurrent.ThreadLocalRandom;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class EncryptionUtilTest {
+
+    @Test
+    void testVerifyToken() {
+        val random = ThreadLocalRandom.current();
+        byte[] token = EncryptionUtil.generateVerifyToken(random);
+
+        assertAll(
+                () -> assertNotNull(token),
+                () -> assertEquals(token.length, 4)
+        );
+    }
+
+    @Test
+    void testServerKey() {
+        KeyPair keyPair = EncryptionUtil.generateKeyPair();
+
+        Key privateKey = keyPair.getPrivate();
+        assertEquals(privateKey.getAlgorithm(), "RSA");
+
+        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
+        assertEquals(publicKey.getAlgorithm(), "RSA");
+
+        // clients accept larger values than the standard vanilla server, but we shouldn't crash them
+        assertAll(
+                () -> assertTrue(publicKey.getModulus().bitLength() >= 1024),
+                () -> assertTrue(publicKey.getModulus().bitLength() < 8192)
+        );
+    }
+
+    @Test
+    void testExpiredClientKey() throws Exception {
+        val clientKey = ResourceLoader.loadClientKey("client_keys/valid_public_key.json");
+
+        // Client expires at the exact second mentioned, so use it for verification
+        val expiredTimestamp = clientKey.expiry();
+        assertFalse(EncryptionUtil.verifyClientKey(clientKey, expiredTimestamp, null));
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            // expiration date changed should make the signature invalid while still being not expired
+            "client_keys/invalid_wrong_expiration.json",
+            // changed public key no longer corresponding to the signature
+            "client_keys/invalid_wrong_key.json",
+            // signature modified no longer corresponding to key and expiration date
+            "client_keys/invalid_wrong_signature.json"
+    })
+    void testInvalidClientKey(String clientKeySource) throws Exception {
+        val clientKey = ResourceLoader.loadClientKey(clientKeySource);
+        Instant expireTimestamp = clientKey.expiry().minus(5, ChronoUnit.HOURS);
+
+        assertFalse(EncryptionUtil.verifyClientKey(clientKey, expireTimestamp, null));
+    }
+
+    @Test
+    void testValidClientKey() throws Exception {
+        val clientKey = ResourceLoader.loadClientKey("client_keys/valid_public_key.json");
+        val verificationTimestamp = clientKey.expiry().minus(5, ChronoUnit.HOURS);
+
+        assertTrue(EncryptionUtil.verifyClientKey(clientKey, verificationTimestamp, null));
+    }
+
+    @Test
+    void testValid191ClientKey() throws Exception {
+        val clientKey = ResourceLoader.loadClientKey("client_keys/valid_public_key_19_1.json");
+        val verificationTimestamp = clientKey.expiry().minus(5, ChronoUnit.HOURS);
+
+        val ownerPremiumId = UUID.fromString("0aaa2c13-922a-411b-b655-9b8c08404695");
+        assertTrue(EncryptionUtil.verifyClientKey(clientKey, verificationTimestamp, ownerPremiumId));
+    }
+
+    @Test
+    void testIncorrect191ClientOwner() throws Exception {
+        val clientKey = ResourceLoader.loadClientKey("client_keys/valid_public_key_19_1.json");
+        val verificationTimestamp = clientKey.expiry().minus(5, ChronoUnit.HOURS);
+
+        val ownerPremiumId = UUID.fromString("61699b2e-d327-4a01-9f1e-0ea8c3f06bc6");
+        assertFalse(EncryptionUtil.verifyClientKey(clientKey, verificationTimestamp, ownerPremiumId));
+    }
+
+    @Test
+    void testDecryptSharedSecret() throws Exception {
+        KeyPair serverPair = EncryptionUtil.generateKeyPair();
+        val serverPK = serverPair.getPublic();
+
+        SecretKey secretKey = generateSharedKey();
+        byte[] encryptedSecret = encrypt(serverPK, secretKey.getEncoded());
+
+        SecretKey decryptSharedKey = EncryptionUtil.decryptSharedKey(serverPair.getPrivate(), encryptedSecret);
+        assertEquals(decryptSharedKey, secretKey);
+    }
+
+    private static byte[] encrypt(PublicKey receiverKey, byte... message)
+            throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
+            IllegalBlockSizeException, BadPaddingException {
+        val encryptCipher = Cipher.getInstance(receiverKey.getAlgorithm());
+        encryptCipher.init(Cipher.ENCRYPT_MODE, receiverKey);
+        return encryptCipher.doFinal(message);
+    }
+
+    private static SecretKeySpec generateSharedKey() {
+        // according to wiki.vg 16 bytes long
+        byte[] sharedKey = new byte[16];
+        ThreadLocalRandom.current().nextBytes(sharedKey);
+        // shared key is to be used for the AES/CFB8 stream cipher to encrypt the traffic
+        // therefore the encryption/decryption has to be AES
+        return new SecretKeySpec(sharedKey, "AES");
+    }
+
+    @Test
+    void testServerIdHash() throws Exception {
+        val serverId = "";
+        val sharedSecret = generateSharedKey();
+        val serverPK = ResourceLoader.loadClientKey("client_keys/valid_public_key.json").key();
+
+        String sessionHash = getServerHash(serverId, sharedSecret, serverPK);
+        assertEquals(EncryptionUtil.getServerIdHashString(serverId, sharedSecret, serverPK), sessionHash);
+    }
+
+    private static String getServerHash(@SuppressWarnings("SameParameterValue") CharSequence serverId,
+                                        SecretKey sharedSecret, PublicKey serverPK) {
+        // https://wiki.vg/Protocol_Encryption#Client
+        // sha1 := Sha1()
+        // sha1.update(ASCII encoding of the server id string from Encryption Request)
+        // sha1.update(shared secret)
+        // sha1.update(server's encoded public key from Encryption Request)
+        // hash := sha1.hexdigest() # String of hex characters
+        @SuppressWarnings("deprecation")
+        val hasher = Hashing.sha1().newHasher();
+        hasher.putString(serverId, StandardCharsets.US_ASCII);
+        hasher.putBytes(sharedSecret.getEncoded());
+        hasher.putBytes(serverPK.getEncoded());
+        //  It works by treating the sha1 output bytes as one large integer in two's complement and then printing the
+        //  integer in base 16, placing a minus sign if the interpreted number is negative.
+        // reference: 
+        // https://github.com/SpigotMC/BungeeCord/blob/ff5727c5ef9c0b56ad35f9816ae6bd660b622cf0/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java#L456
+        return new BigInteger(hasher.hash().asBytes()).toString(16);
+    }
+
+    @Test
+    void testServerIdHashWrongSecret() throws Exception {
+        val serverId = "";
+        val sharedSecret = generateSharedKey();
+        val serverPK = ResourceLoader.loadClientKey("client_keys/valid_public_key.json").key();
+
+        String sessionHash = getServerHash(serverId, sharedSecret, serverPK);
+        assertNotEquals(EncryptionUtil.getServerIdHashString("", generateSharedKey(), serverPK), sessionHash);
+    }
+
+    @Test
+    void testServerIdHashWrongServerKey() {
+        val serverId = "";
+        val sharedSecret = generateSharedKey();
+        val serverPK = EncryptionUtil.generateKeyPair().getPublic();
+
+        String sessionHash = getServerHash(serverId, sharedSecret, serverPK);
+        val wrongPK = EncryptionUtil.generateKeyPair().getPublic();
+        assertNotEquals(EncryptionUtil.getServerIdHashString("", sharedSecret, wrongPK), sessionHash);
+    }
+
+    @Test
+    void testValidSignedNonce() throws Exception {
+        ClientPublicKey clientKey = ResourceLoader.loadClientKey("client_keys/valid_public_key.json");
+        SignatureTestData testData = SignatureTestData.fromResource("signature/valid_signature.json");
+        assertTrue(verifySignedNonce(testData, clientKey));
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "signature/incorrect_nonce.json",
+            "signature/incorrect_salt.json",
+            "signature/incorrect_signature.json",
+    })
+    void testIncorrectNonce(String signatureSource) throws Exception {
+        ClientPublicKey clientKey = ResourceLoader.loadClientKey("client_keys/valid_public_key.json");
+        SignatureTestData testData = SignatureTestData.fromResource(signatureSource);
+        assertFalse(verifySignedNonce(testData, clientKey));
+    }
+
+    @Test
+    void testWrongPublicKeySigned() throws Exception {
+        // load a different public key
+        ClientPublicKey clientKey = ResourceLoader.loadClientKey("client_keys/invalid_wrong_key.json");
+        SignatureTestData testData = SignatureTestData.fromResource("signature/valid_signature.json");
+        assertFalse(verifySignedNonce(testData, clientKey));
+    }
+
+    private static boolean verifySignedNonce(SignatureTestData testData, ClientPublicKey clientKey)
+            throws NoSuchAlgorithmException, InvalidKeyException, SignatureException {
+        PublicKey clientPublicKey = clientKey.key();
+
+        byte[] nonce = testData.getNonce();
+        SignatureData signature = testData.getSignature();
+        long salt = signature.getSalt();
+        return EncryptionUtil.verifySignedNonce(nonce, clientPublicKey, salt, signature.getSignature());
+    }
+
+    @Test
+    void testNonce() throws Exception {
+        byte[] expected = {1, 2, 3, 4};
+        val serverKey = EncryptionUtil.generateKeyPair();
+        val encryptedNonce = encrypt(serverKey.getPublic(), expected);
+
+        assertTrue(EncryptionUtil.verifyNonce(expected, serverKey.getPrivate(), encryptedNonce));
+    }
+
+    @Test
+    void testNonceIncorrect() throws Exception {
+        byte[] expected = {1, 2, 3, 4};
+        val serverKey = EncryptionUtil.generateKeyPair();
+
+        // flipped first character
+        val encryptedNonce = encrypt(serverKey.getPublic(), new byte[]{0, 2, 3, 4});
+        assertFalse(EncryptionUtil.verifyNonce(expected, serverKey.getPrivate(), encryptedNonce));
+    }
+
+    @Test
+    void testNonceFailedDecryption() throws Exception {
+        byte[] expected = {1, 2, 3, 4};
+        val serverKey = EncryptionUtil.generateKeyPair();
+        // generate a new keypair that is different
+        val encryptedNonce = encrypt(EncryptionUtil.generateKeyPair().getPublic(), expected);
+
+        assertThrows(GeneralSecurityException.class,
+                () -> EncryptionUtil.verifyNonce(expected, serverKey.getPrivate(), encryptedNonce)
+        );
+    }
+
+    @Test
+    void testNonceIncorrectEmpty() {
+        byte[] expected = {1, 2, 3, 4};
+        val serverKey = EncryptionUtil.generateKeyPair();
+        byte[] encryptedNonce = {};
+
+        assertThrows(GeneralSecurityException.class,
+                () -> EncryptionUtil.verifyNonce(expected, serverKey.getPrivate(), encryptedNonce)
+        );
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ResourceLoader.java

@@ -0,0 +1,97 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.github.games647.fastlogin.bukkit.listener.protocollib.packet.ClientPublicKey;
+import com.google.common.io.Resources;
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import org.bouncycastle.util.io.pem.PemObject;
+import org.bouncycastle.util.io.pem.PemReader;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyFactory;
+import java.security.NoSuchAlgorithmException;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+import java.time.Instant;
+import java.util.Base64;
+
+public class ResourceLoader {
+
+    public static RSAPrivateKey parsePrivateKey(String keySpec)
+        throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
+        try (
+            Reader reader = new StringReader(keySpec);
+            PemReader pemReader = new PemReader(reader)
+        ) {
+            PemObject pemObject = pemReader.readPemObject();
+            byte[] content = pemObject.getContent();
+            KeySpec privateKeySpec = new PKCS8EncodedKeySpec(content);
+
+            KeyFactory factory = KeyFactory.getInstance("RSA");
+            return (RSAPrivateKey) factory.generatePrivate(privateKeySpec);
+        }
+    }
+
+    protected static ClientPublicKey loadClientKey(String path)
+        throws NoSuchAlgorithmException, IOException, InvalidKeySpecException {
+        URL keyUrl = Resources.getResource(path);
+
+        String lines = Resources.toString(keyUrl, StandardCharsets.US_ASCII);
+        JsonObject object = new Gson().fromJson(lines, JsonObject.class);
+
+        Instant expires = Instant.parse(object.getAsJsonPrimitive("expires_at").getAsString());
+        String key = object.getAsJsonPrimitive("key").getAsString();
+        RSAPublicKey publicKey = parsePublicKey(key);
+
+        byte[] signature = Base64.getDecoder().decode(object.getAsJsonPrimitive("signature").getAsString());
+        return ClientPublicKey.of(expires, publicKey, signature);
+    }
+
+    private static RSAPublicKey parsePublicKey(String keySpec)
+        throws IOException, InvalidKeySpecException, NoSuchAlgorithmException {
+        try (
+            Reader reader = new StringReader(keySpec);
+            PemReader pemReader = new PemReader(reader)
+        ) {
+            PemObject pemObject = pemReader.readPemObject();
+            byte[] content = pemObject.getContent();
+            KeySpec pubKeySpec = new X509EncodedKeySpec(content);
+
+            KeyFactory factory = KeyFactory.getInstance("RSA");
+            return (RSAPublicKey) factory.generatePublic(pubKeySpec);
+        }
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/listener/protocollib/SignatureTestData.java

@@ -0,0 +1,73 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.google.common.io.Resources;
+import com.google.gson.Gson;
+import com.google.gson.annotations.JsonAdapter;
+import lombok.val;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+public class SignatureTestData {
+
+    public static SignatureTestData fromResource(String resourceName) throws IOException {
+        val keyUrl = Resources.getResource(resourceName);
+        val encodedSignature = Resources.toString(keyUrl, StandardCharsets.US_ASCII);
+
+        return new Gson().fromJson(encodedSignature, SignatureTestData.class);
+    }
+
+    @JsonAdapter(Base64Adapter.class)
+    private byte[] nonce;
+
+    private SignatureData signature;
+
+    public byte[] getNonce() {
+        return nonce;
+    }
+
+    public SignatureData getSignature() {
+        return signature;
+    }
+
+    public static class SignatureData {
+
+        private long salt;
+
+        @JsonAdapter(Base64Adapter.class)
+        private byte[] signature;
+
+        public long getSalt() {
+            return salt;
+        }
+
+        public byte[] getSignature() {
+            return signature;
+        }
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/listener/protocollib/VerifyResponseTaskTest.java

@@ -0,0 +1,66 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.listener.protocollib;
+
+import com.comphenix.protocol.injector.packet.PacketRegistry;
+import com.comphenix.protocol.reflect.accessors.Accessors;
+import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import org.bukkit.Bukkit;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedStatic;
+
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mockStatic;
+
+class VerifyResponseTaskTest {
+
+    private static final String NETTY_INJECTOR_CLASS =
+            "com.comphenix.protocol.injector.netty.channel.NettyChannelInjector";
+
+    @Test
+    void getNetworkManagerReflection() throws ClassNotFoundException {
+        try (
+                MockedStatic<Bukkit> bukkitMock = mockStatic(Bukkit.class);
+                MockedStatic<MinecraftReflection> reflectionMock = mockStatic(MinecraftReflection.class);
+                MockedStatic<PacketRegistry> registryMock = mockStatic(PacketRegistry.class)
+        ) {
+            bukkitMock.when(Bukkit::getVersion).thenReturn("git-Bukkit-18fbb24 (MC: 1.17)");
+            reflectionMock.when(MinecraftReflection::getMinecraftPackage).thenReturn("xyz");
+            reflectionMock.when(MinecraftReflection::getEnumProtocolClass).thenReturn(Object.class);
+
+            registryMock.when(() -> PacketRegistry.tryGetPacketClass(any())).thenReturn(Optional.empty());
+            
+            
+            Class<?> injectorClass = Class.forName(NETTY_INJECTOR_CLASS);
+            FieldAccessor accessor = Accessors.getFieldAccessorOrNull(injectorClass, "networkManager", Object.class);
+            assertNotNull(accessor.getField());
+        }
+    }
+}

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/task/DelayedAuthHookTest.java

@@ -0,0 +1,60 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bukkit.task;
+
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import lombok.val;
+import org.bukkit.entity.Player;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class DelayedAuthHookTest {
+
+    @Test
+    void createNewReflectiveInstance() throws ReflectiveOperationException {
+        val authHook = new DelayedAuthHook(null);
+        assertNotNull(authHook.newInstance(DummyHook.class));
+    }
+
+    public static class DummyHook implements AuthPlugin<Player> {
+
+        @Override
+        public boolean forceLogin(Player player) {
+            return false;
+        }
+
+        @Override
+        public boolean forceRegister(Player player, String password) {
+            return false;
+        }
+
+        @Override
+        public boolean isRegistered(String playerName) throws Exception {
+            return false;
+        }
+    }
+}

bukkit/src/test/java/integration/README.md

@@ -0,0 +1,53 @@
+# Integration tests for authentication
+
+## Description
+
+Projects require integration tests in order to check against errors that could only occur if connected to other
+components. However, they are heavier in terms of performance and require a more complex setup. Unit tests often make
+use of fake, mock, stubs, etc. implementations to test the unit in isolation and thus could hide issues across
+boundaries of a unit. Nevertheless, both are not replacement for each other.
+
+## Usage in this project
+
+The authentication system is a core component, so it requires some kind of testing. Here we are going to
+spin up a Spigot server and test with the supported authentication schemes against the implementation of MCProtocolLib.
+
+### Goals
+
+* OS platform independent
+* Reproducible, but not fixed to a specific image hash
+    * This is a dev container, so fixing it to feature/major version is enough instead of a version fixed by hash
+* Improve container spin up
+    * E.g. Remove/Reduce world generation
+
+### Note on automation
+
+The simplest solution it to use the official Mojang session and authentication servers. However, this would require
+a spare Minecraft account. Mocking the auth servers would be a solution to avoid this.
+
+## Related
+
+Interest blog article about integration tests and why they are necessary.
+https://software.rajivprab.com/2019/04/28/rethinking-software-testing-perspectives-from-the-world-of-hardware/
+
+## Issues
+
+### Slow startup
+
+Tried a lot of optimizations like only loading a single world without the nether or the end. However, there the startup
+is still slow. If you have any ideas on how to tune the startup parameters of the Minecraft server or the JVM
+itself to reduce the startup time, please suggest it.
+
+### Checkpoint
+
+An idea to optimize the time is to use CRIU (checkpoint and restore). So to save the process at a certain stage and
+restore all data multiple times. This could cause a lot of issues like open files have to be present. However, the
+impact is significant and since it runs inside the container all files, pids (pid=1) should be matching. Potential
+checkpoint locations are:
+
+* Direct before loading the plugins
+  * Likely before binding the port to prevent issues
+* After loading the libraries
+
+Nevertheless, the current state requires to run it with root and the Java support is currently still in progress.
+

bukkit/src/test/resources/client_keys/README.md

@@ -0,0 +1,27 @@
+# About
+
+This contains test resources for the unit tests. The files are extracted from the Minecraft directory with slight
+modifications. The files are found in `$MINECRAFT_HOME$/profilekeys/`, where `$MINECRAFT_HOME$` represents the
+OS-dependent minecraft folder.
+
+**Notable the files in this folder do not contain the private key information. It should be explicitly
+stripped before including it.**
+
+## Minecraft folder
+
+* Windows: `%appdata%\.minecraft`
+* Linux: `/home/username/.minecraft`
+* Mac: `~/Library/Application Support/minecraft`
+
+## Directory structure
+
+* `valid_public_key.json`: Extracted from the actual file
+* `invalid_wrong_expiration.json`: Changed the expiration date
+* `invalid_wrong_key.json`: Modified public key while keeping the RSA structure valid
+* `invalid_wrong_signature.json`: Changed a character in the public key signature
+
+## File content
+
+* `expires_at`: Expiration date
+* `key`: Public key from the original file out of `public_key.key`
+* `signature`: Mojang signed signature of this public key

bukkit/src/test/resources/client_keys/invalid_wrong_expiration.json

@@ -0,0 +1,5 @@
+{
+    "expires_at": "2022-06-20T07:31:47.318722344Z",
+    "key": "-----BEGIN RSA PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApd3ZxDhcRWWru1XEBke6uYqmbnS2Oxyk\nOMj+QDKrkwUqhVJYciyXGsMx46Mgr/KIoGCcokP5OtIxc6+69/ZLqJ9PvM81kLIxAqyvfBMKMGjP\n376LgxTF1FeDpbe5zXaNRxfmnvQhS5YTLbzgk36qWVjqxJMG4VLVmh7RV5zWsb7XlckZb2zRHM2Y\nMHbEC+ggX+l6zQyfG1KK0MH5k+O6b0xD0rv1wm24sLOesTXH6RZG8cNE3ofdnavxjFodTOnra6w1\naiVcoUTdEPSS86wQwq9j0YCcAKOwMXsqbk9NhpujrdyJ94dev+ELwkNS7P0pPrcfiyFTQeJCZTXz\nJB36MwIDAQAB\n-----END RSA PUBLIC KEY-----\n",
+    "signature": "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"
+}

bukkit/src/test/resources/client_keys/invalid_wrong_key.json

@@ -0,0 +1,5 @@
+{
+    "expires_at": "2022-06-20T08:31:47.318722344Z",
+    "key": "-----BEGIN RSA PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoOv23jt2QPyab6bPRBwH2ggmzQU3I+xmDpi3X5ZB5Em/4uzyZqNVLJc0gShpk0XsdoB28Nq1bPxczOTBxuXi3rg5ax5gL+iymDSU27DLM8s/33lOofzGPJUEQGKlFm0QelDKZ/q5Y/9inHE3hEJKf7h0tnmGahXFmZSF/nRz9GHnfSYpjtDr9bsZOzQuLhHXT5E4ksNRTFW41h0MlZ1qOhO+NiiVgk7LmgVYiV7RRbgO8U6RaCEqg5n28Ewo6QtzB+DF4NTDeu3E9BLH5G0npdUrVNhdRUWCFDmH6n9hqSIz2J7o6GvWqEvp0h9e/3qtLsoS60hnQXunrcWcPaEIYQIDAQAB\n-----END RSA PUBLIC KEY-----\n",
+    "signature": "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"
+}

bukkit/src/test/resources/client_keys/invalid_wrong_signature.json

@@ -0,0 +1,5 @@
+{
+    "expires_at": "2022-06-20T08:31:47.318722344Z",
+    "key": "-----BEGIN RSA PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApd3ZxDhcRWWru1XEBke6uYqmbnS2Oxyk\nOMj+QDKrkwUqhVJYciyXGsMx46Mgr/KIoGCcokP5OtIxc6+69/ZLqJ9PvM81kLIxAqyvfBMKMGjP\n376LgxTF1FeDpbe5zXaNRxfmnvQhS5YTLbzgk36qWVjqxJMG4VLVmh7RV5zWsb7XlckZb2zRHM2Y\nMHbEC+ggX+l6zQyfG1KK0MH5k+O6b0xD0rv1wm24sLOesTXH6RZG8cNE3ofdnavxjFodTOnra6w1\naiVcoUTdEPSS86wQwq9j0YCcAKOwMXsqbk9NhpujrdyJ94dev+ELwkNS7P0pPrcfiyFTQeJCZTXz\nJB36MwIDAQAB\n-----END RSA PUBLIC KEY-----\n",
+    "signature": "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"
+}

bukkit/src/test/resources/client_keys/valid_public_key.json

@@ -0,0 +1,5 @@
+{
+    "expires_at": "2022-06-20T08:31:47.318722344Z",
+    "key": "-----BEGIN RSA PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApd3ZxDhcRWWru1XEBke6uYqmbnS2Oxyk\nOMj+QDKrkwUqhVJYciyXGsMx46Mgr/KIoGCcokP5OtIxc6+69/ZLqJ9PvM81kLIxAqyvfBMKMGjP\n376LgxTF1FeDpbe5zXaNRxfmnvQhS5YTLbzgk36qWVjqxJMG4VLVmh7RV5zWsb7XlckZb2zRHM2Y\nMHbEC+ggX+l6zQyfG1KK0MH5k+O6b0xD0rv1wm24sLOesTXH6RZG8cNE3ofdnavxjFodTOnra6w1\naiVcoUTdEPSS86wQwq9j0YCcAKOwMXsqbk9NhpujrdyJ94dev+ELwkNS7P0pPrcfiyFTQeJCZTXz\nJB36MwIDAQAB\n-----END RSA PUBLIC KEY-----\n",
+    "signature": "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"
+}

bukkit/src/test/resources/client_keys/valid_public_key_19_1.json

@@ -0,0 +1,5 @@
+{
+  "expires_at": "2022-07-29T12:57:39.011Z",
+  "key": "-----BEGIN RSA PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtYOUXdid0c09/eYoseLf8qG9fKQ/G2DY9wlSyEZaFMflwZ8ZpLFYigxzfaimpT3A5cbFIdIH2W2sYl5PwsKSs128GBh/rxXUEZlLkIkS+EfxyuMp9ITclxAjCqvFgfJbZHugtB9Ofi6knCEEgjFwMDh2efdpOXkCxtHuPFfnVzDJBbHWdlCCtJesMAnA2jCT7CqCwsi7sW2QxuTarqHP/cHKiBeBIu/SngGUB6eWmvAwERW5x2D+O26w8Z5sQCND3xQ4D868RALiPNG94TyKoJV+jKi0tTUmjGGs/1ksbSGDQb5xqIH0NYKZhoZrczYPNmJX4k7g5BA5RHX8AGORaQIDAQAB\n-----END RSA PUBLIC KEY-----\n",
+  "signature": "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"
+}

bukkit/src/test/resources/signature/README.md

@@ -0,0 +1,16 @@
+# About
+
+This contains test resources for the unit tests. Files in this folder include pre-made cryptographic signatures.
+
+## Directory structure
+
+* `valid_signature.json`: Extracted using packet extract from an actual authentication
+* `incorrect_nonce.json`: Different nonce token simulating that the server expected a different token than signed
+* `incorrect_salt.json`: Salt sent is different to the content signed by the signature (changed salt field)
+* `incorrect_signature.json`: Changed signature
+
+## File content
+
+* `nonce`: Server generated nonce token
+* `salt`: Client generated random token that will be signed
+* `signature`: Nonce and salt signed using the client key from `valid_public_key.json`

bukkit/src/test/resources/signature/incorrect_nonce.json

@@ -0,0 +1,7 @@
+{
+    "nonce": "galNig\u003d\u003d",
+    "signature": {
+        "signature": "JlXAUtIGDjxUOnF5vkg/NUEN2wlzXcqADyYIw2WRTb5hgKwIgxyUPO5v/2M7xU3hxz2Zf0iYHM97h8qNMGQ43cLgfVH9VWZ1kGMuOby2LNSb6nDaMzm0b02ftThaWOWj9kJXbR8fN7qdpB+28t2CTW5ILT+2AZYI/Sn8gFFR+LvJJt1ENMfEj2ZIIkHecpNBuKyLz1aDCZ5BEASSLfAqHEAA3dpHV1DIgzfpO6xwo7bVFDtcBEeusl/Nc3KyGyT8sDFTsZWgitgz53xNKrZUK8Q2BaJfP0zrGAX36rpYURJSVD0AtI1ic9s5aG+OFUC1YhLXb/1cDv37ZjHcdV2ppw\u003d\u003d",
+        "salt": -2985008842905108412
+    }
+}

bukkit/src/test/resources/signature/incorrect_salt.json

@@ -0,0 +1,7 @@
+{
+    "nonce": "GalNig\u003d\u003d",
+    "signature": {
+        "signature": "JlXAUtIGDjxUOnF5vkg/NUEN2wlzXcqADyYIw2WRTb5hgKwIgxyUPO5v/2M7xU3hxz2Zf0iYHM97h8qNMGQ43cLgfVH9VWZ1kGMuOby2LNSb6nDaMzm0b02ftThaWOWj9kJXbR8fN7qdpB+28t2CTW5ILT+2AZYI/Sn8gFFR+LvJJt1ENMfEj2ZIIkHecpNBuKyLz1aDCZ5BEASSLfAqHEAA3dpHV1DIgzfpO6xwo7bVFDtcBEeusl/Nc3KyGyT8sDFTsZWgitgz53xNKrZUK8Q2BaJfP0zrGAX36rpYURJSVD0AtI1ic9s5aG+OFUC1YhLXb/1cDv37ZjHcdV2ppw\u003d\u003d",
+        "salt": -1985008842905108412
+    }
+}

bukkit/src/test/resources/signature/incorrect_signature.json

@@ -0,0 +1,7 @@
+{
+    "nonce": "GalNig\u003d\u003d",
+    "signature": {
+        "signature": "jlXAUtIGDjxUOnF5vkg/NUEN2wlzXcqADyYIw2WRTb5hgKwIgxyUPO5v/2M7xU3hxz2Zf0iYHM97h8qNMGQ43cLgfVH9VWZ1kGMuOby2LNSb6nDaMzm0b02ftThaWOWj9kJXbR8fN7qdpB+28t2CTW5ILT+2AZYI/Sn8gFFR+LvJJt1ENMfEj2ZIIkHecpNBuKyLz1aDCZ5BEASSLfAqHEAA3dpHV1DIgzfpO6xwo7bVFDtcBEeusl/Nc3KyGyT8sDFTsZWgitgz53xNKrZUK8Q2BaJfP0zrGAX36rpYURJSVD0AtI1ic9s5aG+OFUC1YhLXb/1cDv37ZjHcdV2ppw\u003d\u003d",
+        "salt": -2985008842905108412
+    }
+}

bukkit/src/test/resources/signature/valid_signature.json

@@ -0,0 +1,7 @@
+{
+    "nonce": "GalNig\u003d\u003d",
+    "signature": {
+        "signature": "JlXAUtIGDjxUOnF5vkg/NUEN2wlzXcqADyYIw2WRTb5hgKwIgxyUPO5v/2M7xU3hxz2Zf0iYHM97h8qNMGQ43cLgfVH9VWZ1kGMuOby2LNSb6nDaMzm0b02ftThaWOWj9kJXbR8fN7qdpB+28t2CTW5ILT+2AZYI/Sn8gFFR+LvJJt1ENMfEj2ZIIkHecpNBuKyLz1aDCZ5BEASSLfAqHEAA3dpHV1DIgzfpO6xwo7bVFDtcBEeusl/Nc3KyGyT8sDFTsZWgitgz53xNKrZUK8Q2BaJfP0zrGAX36rpYURJSVD0AtI1ic9s5aG+OFUC1YhLXb/1cDv37ZjHcdV2ppw\u003d\u003d",
+        "salt": -2985008842905108412
+    }
+}

bungee/pom.xml

@@ -0,0 +1,215 @@
+<!--
+
+    SPDX-License-Identifier: MIT
+
+    The MIT License (MIT)
+
+    Copyright (c) 2015-2023 games647 and contributors
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+-->
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.github.games647</groupId>
+        <artifactId>fastlogin</artifactId>
+        <version>1.12-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <!--This has to be in lowercase because it's used by plugin.yml-->
+    <artifactId>fastlogin.bungee</artifactId>
+    <packaging>jar</packaging>
+
+    <!--Represents the main plugin-->
+    <name>FastLoginBungee</name>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <minimizeJar>true</minimizeJar>
+
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                    <shadedArtifactAttached>false</shadedArtifactAttached>
+                    <artifactSet>
+                        <excludes>
+                            <!--Those classes are already present in BungeeCord version-->
+                            <exclude>net.md-5:bungeecord-config</exclude>
+                            <exclude>com.google.code.gson:gson</exclude>
+                            <exclude>com.google.guava:guava</exclude>
+                        </excludes>
+                    </artifactSet>
+                    <relocations>
+                        <relocation>
+                            <pattern>com.zaxxer.hikari</pattern>
+                            <shadedPattern>fastlogin.hikari</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>org.slf4j</pattern>
+                            <shadedPattern>fastlogin.slf4j</shadedPattern>
+                        </relocation>
+                    </relocations>
+                    <!-- Rename the service file too to let SLF4J api find our own relocated jdk logger -->
+                    <!-- Located in META-INF/services -->
+                    <transformers>
+                        <transformer
+                                implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                    </transformers>
+                    <filters>
+                        <filter>
+                            <artifact>*:*</artifact>
+                            <excludes>
+                                <exclude>META-INF/MANIFEST.MF</exclude>
+                                <exclude>**/module-info.class</exclude>
+                            </excludes>
+                        </filter>
+                    </filters>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>codemc-repo</id>
+            <url>https://repo.codemc.io/repository/maven-public/</url>
+        </repository>
+
+        <repository>
+            <id>jitpack.io</id>
+            <url>https://jitpack.io</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <!--Common plugin component-->
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>fastlogin.core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <!--BungeeCord with also the part outside the API-->
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-proxy</artifactId>
+            <version>1.19-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+            <!-- Use our own newer api version -->
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>mysql</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>net.md-5</groupId>
+                    <artifactId>bungeecord-native</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>net.md-5</groupId>
+                    <artifactId>bungeecord-query</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>net.md-5</groupId>
+                    <artifactId>bungeecord-slf4j</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.apache.maven</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.apache.maven.resolver</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Floodgate for Xbox Live Authentication-->
+        <dependency>
+            <groupId>org.geysermc.floodgate</groupId>
+            <artifactId>api</artifactId>
+            <version>${floodgate.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- Bedrock player bridge -->
+        <dependency>
+            <groupId>org.geysermc.geyser</groupId>
+            <artifactId>core</artifactId>
+            <version>${geyser.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- We need the API, but it was excluded above -->
+        <dependency>
+            <groupId>org.geysermc.geyser</groupId>
+            <artifactId>api</artifactId>
+            <version>${geyser.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Login plugin-->
+        <dependency>
+            <groupId>me.vik1395</groupId>
+            <artifactId>BungeeAuth</artifactId>
+            <version>1.4</version>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/lib/BungeeAuth-1.4.jar</systemPath>
+        </dependency>
+    </dependencies>
+</project>

bungee/src/main/java/com/github/games647/fastlogin/bungee/BungeeLoginSession.java

@@ -0,0 +1,68 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee;
+
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+
+public class BungeeLoginSession extends LoginSession {
+
+    private boolean alreadySaved;
+    private boolean alreadyLogged;
+
+    public BungeeLoginSession(String username, boolean registered, StoredProfile profile) {
+        super(username, registered, profile);
+    }
+
+    public synchronized void setRegistered(boolean registered) {
+        this.registered = registered;
+    }
+
+    public synchronized boolean isAlreadySaved() {
+        return alreadySaved;
+    }
+
+    public synchronized void setAlreadySaved(boolean alreadySaved) {
+        this.alreadySaved = alreadySaved;
+    }
+
+    public synchronized boolean isAlreadyLogged() {
+        return alreadyLogged;
+    }
+
+    public synchronized void setAlreadyLogged(boolean alreadyLogged) {
+        this.alreadyLogged = alreadyLogged;
+    }
+
+    @Override
+    public synchronized String toString() {
+        return this.getClass().getSimpleName() + '{'
+            + "alreadySaved=" + alreadySaved
+            + ", alreadyLogged=" + alreadyLogged
+            + ", registered=" + registered
+            + "} " + super.toString();
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/BungeeLoginSource.java

@@ -0,0 +1,78 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee;
+
+import com.github.games647.fastlogin.core.shared.LoginSource;
+import net.md_5.bungee.api.ChatColor;
+import net.md_5.bungee.api.chat.ComponentBuilder;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.api.event.PreLoginEvent;
+
+import java.net.InetSocketAddress;
+
+public class BungeeLoginSource implements LoginSource {
+
+    private final PendingConnection connection;
+    private final PreLoginEvent preLoginEvent;
+
+    public BungeeLoginSource(PendingConnection connection, PreLoginEvent preLoginEvent) {
+        this.connection = connection;
+        this.preLoginEvent = preLoginEvent;
+    }
+
+    @Override
+    public void enableOnlinemode() {
+        connection.setOnlineMode(true);
+    }
+
+    @Override
+    public void kick(String message) {
+        preLoginEvent.setCancelled(true);
+
+        if (message == null) {
+            preLoginEvent.setCancelReason(new ComponentBuilder("Kicked").color(ChatColor.WHITE).create());
+        } else {
+            preLoginEvent.setCancelReason(TextComponent.fromLegacyText(message));
+        }
+    }
+
+    @Override
+    public InetSocketAddress getAddress() {
+        return connection.getAddress();
+    }
+
+    public PendingConnection getConnection() {
+        return connection;
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getSimpleName() + '{'
+            + "connection=" + connection
+            + '}';
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/FastLoginBungee.java

@@ -0,0 +1,216 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee;
+
+import com.github.games647.fastlogin.bungee.hook.BungeeAuthHook;
+import com.github.games647.fastlogin.bungee.listener.ConnectListener;
+import com.github.games647.fastlogin.bungee.listener.PluginMessageListener;
+import com.github.games647.fastlogin.core.AsyncScheduler;
+import com.github.games647.fastlogin.core.CommonUtil;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import com.github.games647.fastlogin.core.hooks.bedrock.BedrockService;
+import com.github.games647.fastlogin.core.hooks.bedrock.FloodgateService;
+import com.github.games647.fastlogin.core.hooks.bedrock.GeyserService;
+import com.github.games647.fastlogin.core.message.ChangePremiumMessage;
+import com.github.games647.fastlogin.core.message.ChannelMessage;
+import com.github.games647.fastlogin.core.message.NamespaceKey;
+import com.github.games647.fastlogin.core.message.SuccessMessage;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.PlatformPlugin;
+import com.google.common.collect.MapMaker;
+import com.google.common.io.ByteArrayDataOutput;
+import com.google.common.io.ByteStreams;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.connection.Server;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.api.plugin.Plugin;
+import net.md_5.bungee.api.plugin.PluginManager;
+import net.md_5.bungee.api.scheduler.GroupedThreadFactory;
+import org.geysermc.floodgate.api.FloodgateApi;
+import org.geysermc.geyser.GeyserImpl;
+import org.slf4j.Logger;
+
+import java.nio.file.Path;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * BungeeCord version of FastLogin. This plugin keeps track on online mode connections.
+ */
+public class FastLoginBungee extends Plugin implements PlatformPlugin<CommandSender> {
+
+    private final ConcurrentMap<PendingConnection, BungeeLoginSession> session = new MapMaker().weakKeys().makeMap();
+
+    private FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core;
+    private AsyncScheduler scheduler;
+    private FloodgateService floodgateService;
+    private GeyserService geyserService;
+    private Logger logger;
+
+    @Override
+    public void onEnable() {
+        logger = CommonUtil.initializeLoggerService(getLogger());
+        scheduler = new AsyncScheduler(logger, task -> getProxy().getScheduler().runAsync(this, task));
+
+        core = new FastLoginCore<>(this);
+        core.load();
+        if (!core.setupDatabase()) {
+            return;
+        }
+
+        if (isPluginInstalled("floodgate")) {
+            floodgateService = new FloodgateService(FloodgateApi.getInstance(), core);
+        }
+
+        if (isPluginInstalled("Geyser-BungeeCord")) {
+            geyserService = new GeyserService(GeyserImpl.getInstance(), core);
+        }
+
+        //events
+        PluginManager pluginManager = getProxy().getPluginManager();
+
+        Listener connectListener = new ConnectListener(this, core.getAntiBot());
+        pluginManager.registerListener(this, connectListener);
+        pluginManager.registerListener(this, new PluginMessageListener(this));
+
+        //this is required to listen to incoming messages from the server
+        getProxy().registerChannel(NamespaceKey.getCombined(getName(), ChangePremiumMessage.CHANGE_CHANNEL));
+        getProxy().registerChannel(NamespaceKey.getCombined(getName(), SuccessMessage.SUCCESS_CHANNEL));
+
+        registerHook();
+    }
+
+    @Override
+    public void onDisable() {
+        if (core != null) {
+            core.close();
+        }
+    }
+
+    public FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> getCore() {
+        return core;
+    }
+
+    public ConcurrentMap<PendingConnection, BungeeLoginSession> getSession() {
+        return session;
+    }
+
+    private void registerHook() {
+        try {
+            List<Class<? extends AuthPlugin<ProxiedPlayer>>> hooks = Collections.singletonList(
+                    BungeeAuthHook.class
+            );
+
+            for (Class<? extends AuthPlugin<ProxiedPlayer>> clazz : hooks) {
+                String pluginName = clazz.getSimpleName();
+                pluginName = pluginName.substring(0, pluginName.length() - "Hook".length());
+                //uses only member classes which uses AuthPlugin interface (skip interfaces)
+                Plugin plugin = getProxy().getPluginManager().getPlugin(pluginName);
+                if (plugin != null) {
+                    logger.info("Hooking into auth plugin: {}", pluginName);
+                    core.setAuthPluginHook(
+                            clazz.getDeclaredConstructor(FastLoginBungee.class).newInstance(this));
+                    break;
+                }
+            }
+        } catch (ReflectiveOperationException ex) {
+            logger.error("Couldn't load the auth hook class", ex);
+        }
+    }
+
+    public void sendPluginMessage(Server server, ChannelMessage message) {
+        if (server != null) {
+            ByteArrayDataOutput dataOutput = ByteStreams.newDataOutput();
+            message.writeTo(dataOutput);
+
+            NamespaceKey channel = new NamespaceKey(getName(), message.getChannelName());
+            server.sendData(channel.getCombinedName(), dataOutput.toByteArray());
+        }
+    }
+
+    @Override
+    public String getName() {
+        return getDescription().getName();
+    }
+
+    @Override
+    public Path getPluginFolder() {
+        return getDataFolder().toPath();
+    }
+
+    @Override
+    public Logger getLog() {
+        return logger;
+    }
+
+    @Override
+    public void sendMessage(CommandSender receiver, String message) {
+        receiver.sendMessage(TextComponent.fromLegacyText(message));
+    }
+
+    @Override
+    @SuppressWarnings("deprecation")
+    public ThreadFactory getThreadFactory() {
+        return new ThreadFactoryBuilder()
+                .setNameFormat(getName() + " Pool Thread #%1$d")
+                //Hikari create daemons by default
+                .setDaemon(true)
+                .setThreadFactory(new GroupedThreadFactory(this, getName()))
+                .build();
+    }
+
+    @Override
+    public AsyncScheduler getScheduler() {
+        return scheduler;
+    }
+
+    @Override
+    public boolean isPluginInstalled(String name) {
+        return getProxy().getPluginManager().getPlugin(name) != null;
+    }
+
+    public FloodgateService getFloodgateService() {
+        return floodgateService;
+    }
+
+    public GeyserService getGeyserService() {
+        return geyserService;
+    }
+
+    @Override
+    public BedrockService<?> getBedrockService() {
+        if (floodgateService != null) {
+            return floodgateService;
+        }
+        return geyserService;
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/event/BungeeFastLoginAutoLoginEvent.java

@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.event;
+
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.shared.event.FastLoginAutoLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import net.md_5.bungee.api.plugin.Cancellable;
+import net.md_5.bungee.api.plugin.Event;
+
+public class BungeeFastLoginAutoLoginEvent extends Event implements FastLoginAutoLoginEvent, Cancellable {
+
+    private final LoginSession session;
+    private final StoredProfile profile;
+    private boolean cancelled;
+
+    public BungeeFastLoginAutoLoginEvent(LoginSession session, StoredProfile profile) {
+        this.session = session;
+        this.profile = profile;
+    }
+
+    @Override
+    public LoginSession getSession() {
+        return session;
+    }
+
+    @Override
+    public StoredProfile getProfile() {
+        return profile;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/event/BungeeFastLoginPreLoginEvent.java

@@ -0,0 +1,59 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.event;
+
+import com.github.games647.fastlogin.core.shared.LoginSource;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import net.md_5.bungee.api.plugin.Event;
+
+public class BungeeFastLoginPreLoginEvent extends Event implements FastLoginPreLoginEvent {
+
+    private final String username;
+    private final LoginSource source;
+    private final StoredProfile profile;
+
+    public BungeeFastLoginPreLoginEvent(String username, LoginSource source, StoredProfile profile) {
+        this.username = username;
+        this.source = source;
+        this.profile = profile;
+    }
+
+    @Override
+    public String getUsername() {
+        return username;
+    }
+
+    @Override
+    public LoginSource getSource() {
+        return source;
+    }
+
+    @Override
+    public StoredProfile getProfile() {
+        return profile;
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/event/BungeeFastLoginPremiumToggleEvent.java

@@ -0,0 +1,51 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.event;
+
+import com.github.games647.fastlogin.core.shared.event.FastLoginPremiumToggleEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import net.md_5.bungee.api.plugin.Event;
+
+public class BungeeFastLoginPremiumToggleEvent extends Event implements FastLoginPremiumToggleEvent {
+
+    private final StoredProfile profile;
+    private final PremiumToggleReason reason;
+
+    public BungeeFastLoginPremiumToggleEvent(StoredProfile profile, PremiumToggleReason reason) {
+        this.profile = profile;
+        this.reason = reason;
+    }
+
+    @Override
+    public StoredProfile getProfile() {
+        return profile;
+    }
+
+    @Override
+    public PremiumToggleReason getReason() {
+        return reason;
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/hook/BungeeAuthHook.java

@@ -0,0 +1,65 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.hook;
+
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.core.hooks.AuthPlugin;
+import me.vik1395.BungeeAuth.Main;
+import me.vik1395.BungeeAuthAPI.RequestHandler;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+
+/**
+ * GitHub:
+ * <a href="https://github.com/vik1395/BungeeAuth-Minecraft">...</a>
+ * <p>
+ * Project page:
+ * <p>
+ * Spigot:
+ * <a href="https://www.spigotmc.org/resources/bungeeauth.493/">...</a>
+ */
+public class BungeeAuthHook implements AuthPlugin<ProxiedPlayer> {
+
+    private final RequestHandler requestHandler = new RequestHandler();
+
+    public BungeeAuthHook(FastLoginBungee plugin) {
+    }
+
+    @Override
+    public boolean forceLogin(ProxiedPlayer player) {
+        String playerName = player.getName();
+        return Main.plonline.contains(playerName) || requestHandler.forceLogin(playerName);
+    }
+
+    @Override
+    public boolean isRegistered(String playerName) {
+        return requestHandler.isRegistered(playerName);
+    }
+
+    @Override
+    public boolean forceRegister(ProxiedPlayer player, String password) {
+        return requestHandler.forceRegister(player, password);
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/listener/ConnectListener.java

@@ -0,0 +1,225 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.listener;
+
+import com.github.games647.craftapi.UUIDAdapter;
+import com.github.games647.fastlogin.bungee.BungeeLoginSession;
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.bungee.task.AsyncPremiumCheck;
+import com.github.games647.fastlogin.bungee.task.FloodgateAuthTask;
+import com.github.games647.fastlogin.bungee.task.ForceLoginTask;
+import com.github.games647.fastlogin.core.antibot.AntiBotService;
+import com.github.games647.fastlogin.core.antibot.AntiBotService.Action;
+import com.github.games647.fastlogin.core.hooks.bedrock.FloodgateService;
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import com.google.common.base.Throwables;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.connection.Server;
+import net.md_5.bungee.api.event.LoginEvent;
+import net.md_5.bungee.api.event.PlayerDisconnectEvent;
+import net.md_5.bungee.api.event.PreLoginEvent;
+import net.md_5.bungee.api.event.ServerConnectedEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.connection.InitialHandler;
+import net.md_5.bungee.connection.LoginResult;
+import net.md_5.bungee.event.EventHandler;
+import net.md_5.bungee.event.EventPriority;
+import net.md_5.bungee.protocol.Property;
+import org.geysermc.floodgate.api.player.FloodgatePlayer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.reflect.Field;
+import java.net.InetSocketAddress;
+import java.util.UUID;
+
+/**
+ * Enables online mode logins for specified users and sends plugin message to the Bukkit version of this plugin in
+ * order to clear that the connection is online mode.
+ */
+public class ConnectListener implements Listener {
+
+    private static final String UUID_FIELD_NAME = "uniqueId";
+    protected static final MethodHandle UNIQUE_ID_SETTER;
+
+    static {
+        MethodHandle setHandle = null;
+        try {
+            Lookup lookup = MethodHandles.lookup();
+
+            Class.forName("net.md_5.bungee.connection.InitialHandler");
+
+            Field uuidField = InitialHandler.class.getDeclaredField(UUID_FIELD_NAME);
+            uuidField.setAccessible(true);
+            setHandle = lookup.unreflectSetter(uuidField);
+        } catch (ReflectiveOperationException reflectiveOperationException) {
+            Logger logger = LoggerFactory.getLogger(ConnectListener.class);
+            logger.error(
+                    "Cannot find Bungee initial handler; Disabling premium UUID and skin won't work.",
+                    reflectiveOperationException
+            );
+        }
+
+        UNIQUE_ID_SETTER = setHandle;
+    }
+
+    private final FastLoginBungee plugin;
+    private final AntiBotService antiBotService;
+    private final Property[] emptyProperties = {};
+
+    public ConnectListener(FastLoginBungee plugin, AntiBotService antiBotService) {
+        this.plugin = plugin;
+        this.antiBotService = antiBotService;
+    }
+
+    @EventHandler
+    public void onPreLogin(PreLoginEvent preLoginEvent) {
+        PendingConnection connection = preLoginEvent.getConnection();
+        if (preLoginEvent.isCancelled()) {
+            return;
+        }
+
+        InetSocketAddress address = preLoginEvent.getConnection().getAddress();
+        String username = connection.getName();
+
+        plugin.getLog().info("Incoming login request for {} from {}", username, connection.getSocketAddress());
+
+        Action action = antiBotService.onIncomingConnection(address, username);
+        switch (action) {
+            case Ignore:
+                // just ignore
+                return;
+            case Block:
+                String message = plugin.getCore().getMessage("kick-antibot");
+                preLoginEvent.setCancelReason(TextComponent.fromLegacyText(message));
+                preLoginEvent.setCancelled(true);
+                break;
+            case Continue:
+            default:
+                preLoginEvent.registerIntent(plugin);
+                Runnable asyncPremiumCheck = new AsyncPremiumCheck(plugin, preLoginEvent, connection, username);
+                plugin.getScheduler().runAsync(asyncPremiumCheck);
+                break;
+        }
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST)
+    public void onLogin(LoginEvent loginEvent) {
+        if (loginEvent.isCancelled()) {
+            return;
+        }
+
+        //use the login event instead of the post login event in order to send the login success packet to the client
+        //with the offline uuid this makes it possible to set the skin then
+        PendingConnection connection = loginEvent.getConnection();
+        if (connection.isOnlineMode()) {
+            LoginSession session = plugin.getSession().get(connection);
+
+            UUID verifiedUUID = connection.getUniqueId();
+            String verifiedUsername = connection.getName();
+            session.setUuid(verifiedUUID);
+            session.setVerifiedUsername(verifiedUsername);
+
+            StoredProfile playerProfile = session.getProfile();
+            playerProfile.setId(verifiedUUID);
+
+            // BungeeCord will do this automatically so override it on disabled option
+            if (UNIQUE_ID_SETTER != null) {
+                InitialHandler initialHandler = (InitialHandler) connection;
+
+                if (!plugin.getCore().getConfig().get("premiumUuid", true)) {
+                    setOfflineId(initialHandler, verifiedUsername);
+                }
+
+                if (!plugin.getCore().getConfig().get("forwardSkin", true)) {
+                    // this is null on offline mode
+                    LoginResult loginProfile = initialHandler.getLoginProfile();
+                    loginProfile.setProperties(emptyProperties);
+                }
+            }
+        }
+    }
+
+    protected void setOfflineId(InitialHandler connection, String username) {
+        try {
+            UUID oldPremiumId = connection.getUniqueId();
+            UUID offlineUUID = UUIDAdapter.generateOfflineId(username);
+
+            // BungeeCord only allows setting the UUID in PreLogin events and before requesting online mode
+            // However if online mode is requested, it will override previous values
+            // So we have to do it with reflection
+            UNIQUE_ID_SETTER.invokeExact(connection, offlineUUID);
+
+            String format = "Overridden UUID from {} to {} (based of {}) on {}";
+            plugin.getLog().info(format, oldPremiumId, offlineUUID, username, connection);
+        } catch (Exception ex) {
+            plugin.getLog().error("Failed to set offline uuid of {}", username, ex);
+        } catch (Throwable throwable) {
+            // throw remaining exceptions like out of memory that we shouldn't handle ourselves
+            Throwables.throwIfUnchecked(throwable);
+        }
+    }
+
+    @EventHandler
+    public void onServerConnected(ServerConnectedEvent serverConnectedEvent) {
+        ProxiedPlayer player = serverConnectedEvent.getPlayer();
+        Server server = serverConnectedEvent.getServer();
+
+        FloodgateService floodgateService = plugin.getFloodgateService();
+        if (floodgateService != null) {
+            FloodgatePlayer floodgatePlayer = floodgateService.getBedrockPlayer(player.getUniqueId());
+            if (floodgatePlayer != null) {
+                Runnable floodgateAuthTask = new FloodgateAuthTask(plugin.getCore(), player, floodgatePlayer, server);
+                plugin.getScheduler().runAsync(floodgateAuthTask);
+                return;
+            }
+        }
+
+        BungeeLoginSession session = plugin.getSession().get(player.getPendingConnection());
+        if (session == null) {
+            return;
+        }
+
+        // delay sending force command, because Paper will process the login event asynchronously
+        // In this case it means that the force command (plugin message) is already received and processed while
+        // player is still in the login phase and reported to be offline.
+        Runnable loginTask = new ForceLoginTask(plugin.getCore(), player, server, session);
+        plugin.getScheduler().runAsync(loginTask);
+    }
+
+    @EventHandler
+    public void onDisconnect(PlayerDisconnectEvent disconnectEvent) {
+        ProxiedPlayer player = disconnectEvent.getPlayer();
+        plugin.getSession().remove(player.getPendingConnection());
+        plugin.getCore().getPendingConfirms().remove(player.getUniqueId());
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/listener/PluginMessageListener.java

@@ -0,0 +1,140 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.listener;
+
+import com.github.games647.fastlogin.bungee.BungeeLoginSession;
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.bungee.task.AsyncToggleMessage;
+import com.github.games647.fastlogin.core.hooks.bedrock.FloodgateService;
+import com.github.games647.fastlogin.core.message.ChangePremiumMessage;
+import com.github.games647.fastlogin.core.message.NamespaceKey;
+import com.github.games647.fastlogin.core.message.SuccessMessage;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import com.google.common.io.ByteArrayDataInput;
+import com.google.common.io.ByteStreams;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.connection.Server;
+import net.md_5.bungee.api.event.PluginMessageEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.event.EventHandler;
+
+import java.util.Arrays;
+
+public class PluginMessageListener implements Listener {
+
+    private final FastLoginBungee plugin;
+
+    private final String successChannel;
+    private final String changeChannel;
+
+    public PluginMessageListener(FastLoginBungee plugin) {
+        this.plugin = plugin;
+
+        this.successChannel = new NamespaceKey(plugin.getName(), SuccessMessage.SUCCESS_CHANNEL).getCombinedName();
+        this.changeChannel = new NamespaceKey(plugin.getName(), ChangePremiumMessage.CHANGE_CHANNEL).getCombinedName();
+    }
+
+    @EventHandler
+    public void onPluginMessage(PluginMessageEvent pluginMessageEvent) {
+        String channel = pluginMessageEvent.getTag();
+        if (pluginMessageEvent.isCancelled() || !channel.startsWith(plugin.getName().toLowerCase())) {
+            return;
+        }
+
+        //the client shouldn't be able to read the messages in order to know something about server internal states
+        //moreover the client shouldn't be able to fake a running premium check by sending the result message
+        pluginMessageEvent.setCancelled(true);
+
+        if (!(pluginMessageEvent.getSender() instanceof Server)) {
+            //check if the message is sent from the server
+            return;
+        }
+
+        //so that we can safely process this in the background
+        byte[] data = Arrays.copyOf(pluginMessageEvent.getData(), pluginMessageEvent.getData().length);
+        ProxiedPlayer forPlayer = (ProxiedPlayer) pluginMessageEvent.getReceiver();
+
+        plugin.getScheduler().runAsync(() -> readMessage(forPlayer, channel, data));
+    }
+
+    private void readMessage(ProxiedPlayer forPlayer, String channel, byte[] data) {
+        FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core = plugin.getCore();
+
+        ByteArrayDataInput dataInput = ByteStreams.newDataInput(data);
+        if (successChannel.equals(channel)) {
+            onSuccessMessage(forPlayer);
+        } else if (changeChannel.equals(channel)) {
+            ChangePremiumMessage changeMessage = new ChangePremiumMessage();
+            changeMessage.readFrom(dataInput);
+
+            String playerName = changeMessage.getPlayerName();
+            boolean isSourceInvoker = changeMessage.isSourceInvoker();
+            if (changeMessage.shouldEnable()) {
+                if (playerName.equals(forPlayer.getName()) && plugin.getCore().getConfig().get("premium-warning", true)
+                        && !core.getPendingConfirms().contains(forPlayer.getUniqueId())) {
+                    String message = core.getMessage("premium-warning");
+                    forPlayer.sendMessage(TextComponent.fromLegacyText(message));
+                    core.getPendingConfirms().add(forPlayer.getUniqueId());
+                    return;
+                }
+
+                core.getPendingConfirms().remove(forPlayer.getUniqueId());
+                Runnable task = new AsyncToggleMessage(core, forPlayer, playerName, true, isSourceInvoker);
+                plugin.getScheduler().runAsync(task);
+            } else {
+                Runnable task = new AsyncToggleMessage(core, forPlayer, playerName, false, isSourceInvoker);
+                plugin.getScheduler().runAsync(task);
+            }
+        }
+    }
+
+    private void onSuccessMessage(ProxiedPlayer forPlayer) {
+        boolean shouldPersist = forPlayer.getPendingConnection().isOnlineMode();
+
+        FloodgateService floodgateService = plugin.getFloodgateService();
+        if (!shouldPersist && floodgateService != null) {
+            // always save floodgate players to lock this username
+            shouldPersist = floodgateService.isBedrockPlayer(forPlayer.getUniqueId());
+        }
+
+        if (shouldPersist) {
+            //bukkit module successfully received and force logged in the user
+            //update only on success to prevent corrupt data
+            BungeeLoginSession loginSession = plugin.getSession().get(forPlayer.getPendingConnection());
+            StoredProfile playerProfile = loginSession.getProfile();
+            loginSession.setRegistered(true);
+
+            if (!loginSession.isAlreadySaved()) {
+                playerProfile.setPremium(true);
+                plugin.getCore().getStorage().save(playerProfile);
+                loginSession.setAlreadySaved(true);
+            }
+        }
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/task/AsyncPremiumCheck.java

@@ -0,0 +1,91 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.task;
+
+import com.github.games647.fastlogin.bungee.BungeeLoginSession;
+import com.github.games647.fastlogin.bungee.BungeeLoginSource;
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.bungee.event.BungeeFastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.shared.JoinManagement;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPreLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.PreLoginEvent;
+
+public class AsyncPremiumCheck extends JoinManagement<ProxiedPlayer, CommandSender, BungeeLoginSource>
+        implements Runnable {
+
+    private final FastLoginBungee plugin;
+    private final PreLoginEvent preLoginEvent;
+
+    private final String username;
+    private final PendingConnection connection;
+
+    public AsyncPremiumCheck(FastLoginBungee plugin, PreLoginEvent preLoginEvent, PendingConnection connection,
+                             String username) {
+        super(plugin.getCore(), plugin.getCore().getAuthPluginHook(), plugin.getBedrockService());
+
+        this.plugin = plugin;
+        this.preLoginEvent = preLoginEvent;
+        this.connection = connection;
+        this.username = username;
+    }
+
+    @Override
+    public void run() {
+        plugin.getSession().remove(connection);
+
+        try {
+            super.onLogin(username, new BungeeLoginSource(connection, preLoginEvent));
+        } finally {
+            preLoginEvent.completeIntent(plugin);
+        }
+    }
+
+    @Override
+    public FastLoginPreLoginEvent callFastLoginPreLoginEvent(String username, BungeeLoginSource source,
+                                                             StoredProfile profile) {
+        return plugin.getProxy().getPluginManager()
+                .callEvent(new BungeeFastLoginPreLoginEvent(username, source, profile));
+    }
+
+    @Override
+    public void requestPremiumLogin(BungeeLoginSource source, StoredProfile profile,
+                                    String username, boolean registered) {
+        source.enableOnlinemode();
+        plugin.getSession().put(source.getConnection(), new BungeeLoginSession(username, registered, profile));
+
+        String ip = source.getAddress().getAddress().getHostAddress();
+        plugin.getCore().getPendingLogin().put(ip + username, new Object());
+    }
+
+    @Override
+    public void startCrackedSession(BungeeLoginSource source, StoredProfile profile, String username) {
+        plugin.getSession().put(source.getConnection(), new BungeeLoginSession(username, false, profile));
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/task/AsyncToggleMessage.java

@@ -0,0 +1,107 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.task;
+
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.bungee.event.BungeeFastLoginPremiumToggleEvent;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.event.FastLoginPremiumToggleEvent.PremiumToggleReason;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+
+public class AsyncToggleMessage implements Runnable {
+
+    private final FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core;
+    private final ProxiedPlayer sender;
+    private final String targetPlayer;
+    private final boolean toPremium;
+    private final boolean isPlayerSender;
+
+    public AsyncToggleMessage(FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core,
+             ProxiedPlayer sender, String playerName, boolean toPremium, boolean playerSender) {
+        this.core = core;
+        this.sender = sender;
+        this.targetPlayer = playerName;
+        this.toPremium = toPremium;
+        this.isPlayerSender = playerSender;
+    }
+
+    @Override
+    public void run() {
+        if (toPremium) {
+            activatePremium();
+        } else {
+            turnOffPremium();
+        }
+    }
+
+    private void turnOffPremium() {
+        StoredProfile playerProfile = core.getStorage().loadProfile(targetPlayer);
+        //existing player is already cracked
+        if (playerProfile.isSaved() && !playerProfile.isPremium()) {
+            sendMessage("not-premium");
+            return;
+        }
+
+        playerProfile.setPremium(false);
+        playerProfile.setId(null);
+        core.getStorage().save(playerProfile);
+        PremiumToggleReason reason = (!isPlayerSender || !sender.getName().equalsIgnoreCase(playerProfile.getName()))
+            ? PremiumToggleReason.COMMAND_OTHER : PremiumToggleReason.COMMAND_SELF;
+        core.getPlugin().getProxy().getPluginManager().callEvent(
+                new BungeeFastLoginPremiumToggleEvent(playerProfile, reason));
+        sendMessage("remove-premium");
+    }
+
+    private void activatePremium() {
+        StoredProfile playerProfile = core.getStorage().loadProfile(targetPlayer);
+        if (playerProfile.isPremium()) {
+            sendMessage("already-exists");
+            return;
+        }
+
+        playerProfile.setPremium(true);
+        core.getStorage().save(playerProfile);
+        PremiumToggleReason reason = (!isPlayerSender || !sender.getName().equalsIgnoreCase(playerProfile.getName()))
+            ? PremiumToggleReason.COMMAND_OTHER : PremiumToggleReason.COMMAND_SELF;
+        core.getPlugin().getProxy().getPluginManager().callEvent(
+                new BungeeFastLoginPremiumToggleEvent(playerProfile, reason));
+        sendMessage("add-premium");
+    }
+
+    private void sendMessage(String localeId) {
+        String message = core.getMessage(localeId);
+        if (isPlayerSender) {
+            sender.sendMessage(TextComponent.fromLegacyText(message));
+        } else {
+            CommandSender console = ProxyServer.getInstance().getConsole();
+            console.sendMessage(TextComponent.fromLegacyText(message));
+        }
+    }
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/task/FloodgateAuthTask.java

@@ -0,0 +1,77 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.task;
+
+import com.github.games647.fastlogin.bungee.BungeeLoginSession;
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.FloodgateManagement;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.connection.Server;
+import org.geysermc.floodgate.api.player.FloodgatePlayer;
+
+import java.net.InetSocketAddress;
+import java.util.UUID;
+
+public class FloodgateAuthTask
+        extends FloodgateManagement<ProxiedPlayer, CommandSender, BungeeLoginSession, FastLoginBungee> {
+
+    private final Server server;
+
+    public FloodgateAuthTask(FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core, ProxiedPlayer player,
+            FloodgatePlayer floodgatePlayer, Server server) {
+        super(core, player, floodgatePlayer);
+        this.server = server;
+    }
+
+    @Override
+    protected void startLogin() {
+        BungeeLoginSession session = new BungeeLoginSession(player.getName(), isRegistered, profile);
+        core.getPlugin().getSession().put(player.getPendingConnection(), session);
+
+        // run login task
+        Runnable forceLoginTask = new ForceLoginTask(core.getPlugin().getCore(), player, server, session,
+                isAutoAuthAllowed(autoLoginFloodgate));
+        core.getPlugin().getScheduler().runAsync(forceLoginTask);
+    }
+
+    @Override
+    protected String getName(ProxiedPlayer player) {
+        return player.getName();
+    }
+
+    @Override
+    protected UUID getUUID(ProxiedPlayer player) {
+        return player.getUniqueId();
+    }
+
+    @Override
+    protected InetSocketAddress getAddress(ProxiedPlayer player) {
+        return player.getAddress();
+    }
+
+}

bungee/src/main/java/com/github/games647/fastlogin/bungee/task/ForceLoginTask.java

@@ -0,0 +1,130 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.task;
+
+import com.github.games647.fastlogin.bungee.BungeeLoginSession;
+import com.github.games647.fastlogin.bungee.FastLoginBungee;
+import com.github.games647.fastlogin.bungee.event.BungeeFastLoginAutoLoginEvent;
+import com.github.games647.fastlogin.core.message.ChannelMessage;
+import com.github.games647.fastlogin.core.message.LoginActionMessage;
+import com.github.games647.fastlogin.core.message.LoginActionMessage.Type;
+import com.github.games647.fastlogin.core.shared.FastLoginCore;
+import com.github.games647.fastlogin.core.shared.ForceLoginManagement;
+import com.github.games647.fastlogin.core.shared.LoginSession;
+import com.github.games647.fastlogin.core.shared.event.FastLoginAutoLoginEvent;
+import com.github.games647.fastlogin.core.storage.StoredProfile;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.connection.Server;
+
+import java.util.UUID;
+
+public class ForceLoginTask
+        extends ForceLoginManagement<ProxiedPlayer, CommandSender, BungeeLoginSession, FastLoginBungee> {
+
+    private final Server server;
+
+    //treat player as if they had a premium account, even when they don't
+    //use for Floodgate auto login/register
+    private final boolean forcedOnlineMode;
+
+    public ForceLoginTask(FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core,
+                          ProxiedPlayer player, Server server, BungeeLoginSession session, boolean forcedOnlineMode) {
+        super(core, player, session);
+
+        this.server = server;
+        this.forcedOnlineMode = forcedOnlineMode;
+    }
+
+    public ForceLoginTask(FastLoginCore<ProxiedPlayer, CommandSender, FastLoginBungee> core, ProxiedPlayer player,
+            Server server, BungeeLoginSession session) {
+        this(core, player, server, session, false);
+    }
+
+    @Override
+    public void run() {
+        if (session == null) {
+            return;
+        }
+
+        super.run();
+
+        if (!isOnlineMode()) {
+            session.setAlreadySaved(true);
+        }
+    }
+
+    @Override
+    public boolean forceLogin(ProxiedPlayer player) {
+        if (session.isAlreadyLogged()) {
+            return true;
+        }
+
+        session.setAlreadyLogged(true);
+        return super.forceLogin(player);
+    }
+
+    @Override
+    public FastLoginAutoLoginEvent callFastLoginAutoLoginEvent(LoginSession session, StoredProfile profile) {
+        return core.getPlugin().getProxy().getPluginManager()
+                .callEvent(new BungeeFastLoginAutoLoginEvent(session, profile));
+    }
+
+    @Override
+    public boolean forceRegister(ProxiedPlayer player) {
+        return session.isAlreadyLogged() || super.forceRegister(player);
+    }
+
+    @Override
+    public void onForceActionSuccess(LoginSession session) {
+        //sub channel name
+        Type type = Type.LOGIN;
+        if (session.needsRegistration()) {
+            type = Type.REGISTER;
+        }
+
+        UUID proxyId = UUID.fromString(ProxyServer.getInstance().getConfig().getUuid());
+        ChannelMessage loginMessage = new LoginActionMessage(type, player.getName(), proxyId);
+
+        core.getPlugin().sendPluginMessage(server, loginMessage);
+    }
+
+    @Override
+    public String getName(ProxiedPlayer player) {
+        return player.getName();
+    }
+
+    @Override
+    public boolean isOnline(ProxiedPlayer player) {
+        return player.isConnected();
+    }
+
+    @Override
+    public boolean isOnlineMode() {
+        return forcedOnlineMode || player.getPendingConnection().isOnlineMode();
+    }
+}

bungee/src/main/resources/bungee.yml

@@ -0,0 +1,21 @@
+# project data for BungeeCord
+# This file will be prioritised over plugin.yml which can be also used for Bungee
+# This make it easy to combine BungeeCord and Bukkit support in one plugin
+name: ${project.parent.name}
+# ${-} will be automatically replaced by Maven
+main: ${project.groupId}.${project.artifactId}.${project.name}
+
+version: ${project.version}-${git.commit.id.abbrev}
+author: games647, https://github.com/games647/FastLogin/graphs/contributors
+
+softDepends:
+    # BungeeCord auth plugins
+    - BungeeAuth
+    - BungeeCordAuthenticatorBungee
+    - SodionAuth
+    # Bedrock Player Bridge
+    - Geyser-BungeeCord
+    - floodgate
+
+description: |
+    ${project.description}

bungee/src/test/java/com/github/games647/fastlogin/bungee/listener/ConnectListenerTest.java

@@ -0,0 +1,57 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.bungee.listener;
+
+import net.md_5.bungee.BungeeCord;
+import net.md_5.bungee.conf.Configuration;
+import net.md_5.bungee.connection.InitialHandler;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Field;
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.mock;
+
+class ConnectListenerTest {
+
+    @Test
+    void testUUIDSetter() throws Throwable {
+        BungeeCord proxyMock = mock(BungeeCord.class);
+        BungeeCord.setInstance(proxyMock);
+        
+        Configuration configMock = mock(Configuration.class);
+        Field configField = proxyMock.getClass().getField("config");
+        configField.setAccessible(true);
+        configField.set(proxyMock, configMock);
+
+        InitialHandler handler = new InitialHandler(proxyMock, null);
+
+        UUID expectedUUID = UUID.randomUUID();
+        ConnectListener.UNIQUE_ID_SETTER.invokeExact(handler, expectedUUID);
+        assertEquals(expectedUUID, handler.getUniqueId());
+    }
+}

checkstyle.xml

@@ -0,0 +1,233 @@
+<?xml version="1.0"?>
+<!--
+
+    SPDX-License-Identifier: MIT
+
+    The MIT License (MIT)
+
+    Copyright (c) 2015-2023 games647 and contributors
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+-->
+<!DOCTYPE module PUBLIC
+          "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+          "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+
+  Checkstyle configuration that checks the sun coding conventions from:
+
+    - the Java Language Specification at
+      https://docs.oracle.com/javase/specs/jls/se11/html/index.html
+
+    - the Sun Code Conventions at https://www.oracle.com/java/technologies/javase/codeconventions-contents.html
+
+    - the Javadoc guidelines at
+      https://www.oracle.com/technical-resources/articles/java/javadoc-tool.html
+
+    - the JDK Api documentation https://docs.oracle.com/en/java/javase/11/
+
+    - some best practices
+
+  Checkstyle is very configurable. Be sure to read the documentation at
+  https://checkstyle.org (or in your downloaded distribution).
+
+  Most Checks are configurable, be sure to consult the documentation.
+
+  To completely disable a check, just comment it out or delete it from the file.
+  To suppress certain violations please review suppression filters.
+
+  Finally, it is worth reading the documentation.
+
+-->
+
+<module name="Checker">
+  <!--
+      If you set the basedir property below, then all reported file
+      names will be relative to the specified directory. See
+      https://checkstyle.org/config.html#Checker
+
+      <property name="basedir" value="${basedir}"/>
+  -->
+  <property name="severity" value="error"/>
+
+  <property name="fileExtensions" value="java, properties, xml"/>
+
+  <!-- Excludes all 'module-info.java' files              -->
+  <!-- See https://checkstyle.org/config_filefilters.html -->
+  <module name="BeforeExecutionExclusionFileFilter">
+    <property name="fileNamePattern" value="module\-info\.java$"/>
+  </module>
+
+  <!-- https://checkstyle.org/config_filters.html#SuppressionFilter -->
+  <module name="SuppressionFilter">
+    <property name="file" value="${org.checkstyle.sun.suppressionfilter.config}"
+              default="checkstyle-suppressions.xml" />
+    <property name="optional" value="true"/>
+  </module>
+
+  <!-- Checks that a package-info.java file exists for each package.     -->
+  <!-- See https://checkstyle.org/config_javadoc.html#JavadocPackage -->
+  <!--<module name="JavadocPackage"/>-->
+
+  <!-- Checks whether files end with a new line.                        -->
+  <!-- See https://checkstyle.org/config_misc.html#NewlineAtEndOfFile -->
+  <module name="NewlineAtEndOfFile"/>
+
+  <!-- Checks that property files contain the same keys.         -->
+  <!-- See https://checkstyle.org/config_misc.html#Translation -->
+  <module name="Translation"/>
+
+  <!-- Checks for Size Violations.                    -->
+  <!-- See https://checkstyle.org/config_sizes.html -->
+  <module name="FileLength"/>
+  <module name="LineLength">
+    <property name="max" value="120"/>
+    <property name="fileExtensions" value="java"/>
+    <property name="ignorePattern" value="^ *\* *@see.+$"/>
+  </module>
+
+  <!-- Checks for whitespace                               -->
+  <!-- See https://checkstyle.org/config_whitespace.html -->
+  <module name="FileTabCharacter"/>
+
+  <!-- Miscellaneous other checks.                   -->
+  <!-- See https://checkstyle.org/config_misc.html -->
+  <module name="RegexpSingleline">
+    <property name="format" value="\s+$"/>
+    <property name="minimum" value="0"/>
+    <property name="maximum" value="0"/>
+    <property name="message" value="Line has trailing spaces."/>
+  </module>
+
+  <!-- Checks for Headers                                -->
+  <!-- See https://checkstyle.org/config_header.html   -->
+  <!-- <module name="Header"> -->
+  <!--   <property name="headerFile" value="${checkstyle.header.file}"/> -->
+  <!--   <property name="fileExtensions" value="java"/> -->
+  <!-- </module> -->
+
+  <module name="TreeWalker">
+
+    <!-- Checks for Javadoc comments.                     -->
+    <!-- See https://checkstyle.org/config_javadoc.html -->
+    <module name="InvalidJavadocPosition"/>
+    <module name="JavadocMethod"/>
+    <!--<module name="JavadocType"/>-->
+    <!--<module name="JavadocVariable"/>-->
+    <!--<module name="JavadocStyle"/>-->
+    <!--<module name="MissingJavadocMethod"/>-->
+
+    <!-- Checks for Naming Conventions.                  -->
+    <!-- See https://checkstyle.org/config_naming.html -->
+    <module name="ConstantName"/>
+    <module name="LocalFinalVariableName"/>
+    <module name="LocalVariableName"/>
+    <module name="MemberName"/>
+    <module name="MethodName"/>
+    <module name="PackageName"/>
+    <module name="ParameterName"/>
+    <module name="StaticVariableName"/>
+    <module name="TypeName"/>
+
+    <!-- Checks for imports                              -->
+    <!-- See https://checkstyle.org/config_imports.html -->
+    <module name="AvoidStarImport"/>
+    <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
+    <module name="RedundantImport"/>
+    <module name="UnusedImports">
+      <property name="processJavadoc" value="false"/>
+    </module>
+
+    <!-- Checks for Size Violations.                    -->
+    <!-- See https://checkstyle.org/config_sizes.html -->
+    <module name="MethodLength"/>
+    <module name="ParameterNumber"/>
+
+    <!-- Checks for whitespace                               -->
+    <!-- See https://checkstyle.org/config_whitespace.html -->
+    <module name="EmptyForIteratorPad"/>
+    <module name="GenericWhitespace"/>
+    <module name="MethodParamPad"/>
+    <module name="NoWhitespaceAfter"/>
+    <module name="NoWhitespaceBefore"/>
+    <module name="OperatorWrap"/>
+    <module name="ParenPad"/>
+    <module name="TypecastParenPad"/>
+    <module name="WhitespaceAfter"/>
+    <module name="WhitespaceAround"/>
+
+    <!-- Modifier Checks                                    -->
+    <!-- See https://checkstyle.org/config_modifier.html -->
+    <module name="ModifierOrder"/>
+    <module name="RedundantModifier"/>
+
+    <!-- Checks for blocks. You know, those {}'s         -->
+    <!-- See https://checkstyle.org/config_blocks.html -->
+    <module name="AvoidNestedBlocks"/>
+    <module name="EmptyBlock"/>
+    <module name="LeftCurly"/>
+    <module name="NeedBraces"/>
+    <module name="RightCurly"/>
+
+    <!-- Checks for common coding problems               -->
+    <!-- See https://checkstyle.org/config_coding.html -->
+    <module name="EmptyStatement"/>
+    <module name="EqualsHashCode"/>
+    <module name="IllegalInstantiation"/>
+    <module name="InnerAssignment"/>
+    <!--<module name="MagicNumber"/>-->
+    <module name="MissingSwitchDefault"/>
+    <module name="MultipleVariableDeclarations"/>
+    <module name="SimplifyBooleanExpression"/>
+    <module name="SimplifyBooleanReturn"/>
+
+    <!-- Checks for class design                         -->
+    <!-- See https://checkstyle.org/config_design.html -->
+    <!--<module name="DesignForExtension"/>-->
+    <module name="FinalClass"/>
+    <module name="HideUtilityClassConstructor"/>
+    <module name="InterfaceIsType"/>
+
+    <!-- Miscellaneous other checks.                   -->
+    <!-- See https://checkstyle.org/config_misc.html -->
+    <module name="ArrayTypeStyle"/>
+    <!--<module name="FinalParameters"/>-->
+<!--    <module name="TodoComment"/>-->
+    <module name="UpperEll"/>
+
+    <!-- https://checkstyle.org/config_filters.html#SuppressionXpathFilter -->
+    <module name="SuppressionXpathFilter">
+      <property name="file" value="${org.checkstyle.sun.suppressionxpathfilter.config}"
+                default="checkstyle-xpath-suppressions.xml" />
+      <property name="optional" value="true"/>
+    </module>
+
+    <!-- Suppress filters via comments -->
+    <!-- https://stackoverflow.com/a/4023351/9767089 -->
+    <module name="SuppressionCommentFilter">
+      <property name="offCommentFormat" value="CHECKSTYLE.OFF\: ([\w\|]+)"/>
+      <property name="onCommentFormat" value="CHECKSTYLE.ON\: ([\w\|]+)"/>
+      <property name="checkFormat" value="$1"/>
+    </module>
+
+  </module>
+
+</module>

core/pom.xml

@@ -0,0 +1,208 @@
+<!--
+
+    SPDX-License-Identifier: MIT
+
+    The MIT License (MIT)
+
+    Copyright (c) 2015-2023 games647 and contributors
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+-->
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.github.games647</groupId>
+        <artifactId>fastlogin</artifactId>
+        <version>1.12-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>fastlogin.core</artifactId>
+    <packaging>jar</packaging>
+
+    <name>FastLoginCore</name>
+
+    <repositories>
+        <repository>
+            <id>luck-repo</id>
+            <url>https://ci.lucko.me/plugin/repository/everything/</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+        <repository>
+            <id>codemc-repo</id>
+            <url>https://repo.codemc.io/repository/maven-public/</url>
+        </repository>
+        <!-- Floodgate -->
+        <repository>
+            <id>opencollab-snapshot</id>
+            <url>https://repo.opencollab.dev/maven-snapshots/</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+        </repository>
+    </repositories>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.3.0</version>
+                <configuration>
+                    <archive>
+                        <manifestEntries>
+                            <Automatic-Module-Name>com.github.games647.fastlogin.core</Automatic-Module-Name>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <!-- Libraries that we shade into the project -->
+
+        <!--Database pooling-->
+        <dependency>
+            <groupId>com.zaxxer</groupId>
+            <artifactId>HikariCP</artifactId>
+            <version>4.0.3</version>
+            <exclusions>
+                <!-- HikariCP uses an old version of this API that has a typo in the service interface -->
+                <!-- We will use the api provided by the jdk14 dependency -->
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Logging framework implements slf4j which is required by hikari-->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-jdk14</artifactId>
+            <version>2.0.11</version>
+        </dependency>
+
+        <!-- snakeyaml is present in Bungee, Spigot, Cauldron, so we could use this independent implementation -->
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-config</artifactId>
+            <version>1.19-R0.1-SNAPSHOT</version>
+        </dependency>
+
+        <!--Floodgate for Xbox Live Authentication-->
+        <dependency>
+            <groupId>org.geysermc.floodgate</groupId>
+            <artifactId>api</artifactId>
+            <version>${floodgate.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- Bedrock player bridge -->
+        <dependency>
+            <groupId>org.geysermc.geyser</groupId>
+            <artifactId>core</artifactId>
+            <version>${geyser.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- We need the API, but it was excluded above -->
+        <dependency>
+            <groupId>org.geysermc.geyser</groupId>
+            <artifactId>api</artifactId>
+            <version>${geyser.version}</version>
+            <scope>provided</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!--Common component for contacting the Mojang API-->
+        <dependency>
+            <groupId>com.github.games647</groupId>
+            <artifactId>craftapi</artifactId>
+            <version>0.6.2</version>
+        </dependency>
+
+        <!-- APIs we can use because they are available in all platforms (Spigot, Bungee, Velocity) -->
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <!-- Old version for velocity -->
+            <version>25.1-jre</version>
+            <!-- Exclude compile time dependencies not marked as such on upstream  -->
+            <exclusions>
+                <exclusion>
+                    <groupId>com.google.code.findbugs</groupId>
+                    <artifactId>jsr305</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.checkerframework</groupId>
+                    <artifactId>checker-qual</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>com.google.errorprone</groupId>
+                    <artifactId>error_prone_annotations</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>com.google.j2objc</groupId>
+                    <artifactId>j2objc-annotations</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>animal-sniffer-annotations</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.10.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.xerial</groupId>
+            <artifactId>sqlite-jdbc</artifactId>
+            <version>[3.36,)</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

core/src/main/java/com/github/games647/fastlogin/core/AsyncScheduler.java

@@ -0,0 +1,75 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core;
+
+import org.slf4j.Logger;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * This limits the number of threads that are used at maximum. Thread creation can be very heavy for the CPU and
+ * context switching between threads too. However, we need many threads for blocking HTTP and database calls.
+ * Nevertheless, this number can be further limited, because the number of actually working database threads
+ * is limited by the size of our database pool. The goal is to separate concerns into processing and blocking only
+ * threads.
+ */
+public class AsyncScheduler {
+
+    private static final int MAX_CAPACITY = 1024;
+
+    //todo: single thread for delaying and scheduling tasks
+    private final Logger logger;
+
+    // 30 threads are still too many - the optimal solution is to separate into processing and blocking threads
+    // where processing threads could only be max number of cores while blocking threads could be minimized using
+    // non-blocking I/O and a single event executor
+    private final Executor processingPool;
+
+    private final AtomicInteger currentlyRunning = new AtomicInteger();
+
+    public AsyncScheduler(Logger logger, Executor processingPool) {
+        this.logger = logger;
+        this.processingPool = processingPool;
+    }
+
+    public CompletableFuture<Void> runAsync(Runnable task) {
+        return CompletableFuture.runAsync(() -> process(task), processingPool).exceptionally(error -> {
+            logger.warn("Error occurred on thread pool", error);
+            return null;
+        });
+    }
+
+    private void process(Runnable task) {
+        currentlyRunning.incrementAndGet();
+        try {
+            task.run();
+        } finally {
+            currentlyRunning.getAndDecrement();
+        }
+    }
+}

core/src/main/java/com/github/games647/fastlogin/core/CommonUtil.java

@@ -0,0 +1,116 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core;
+
+import com.google.common.cache.CacheBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.jul.JDK14LoggerAdapter;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+
+public final class CommonUtil {
+
+    private static final char COLOR_CHAR = '&';
+    private static final char TRANSLATED_CHAR = '§';
+
+    public static <K, V> ConcurrentMap<K, V> buildCache(int expireAfterWrite, int maxSize) {
+        CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
+
+        if (expireAfterWrite > 0) {
+            builder.expireAfterWrite(expireAfterWrite, TimeUnit.MINUTES);
+        }
+
+        if (maxSize > 0) {
+            builder.maximumSize(maxSize);
+        }
+
+        return builder.<K, V>build().asMap();
+    }
+
+    public static String translateColorCodes(String rawMessage) {
+        char[] chars = rawMessage.toCharArray();
+        for (int i = 0; i < chars.length - 1; i++) {
+            if (chars[i] == COLOR_CHAR && "x0123456789AaBbCcDdEeFfKkLlMmNnOoRr".indexOf(chars[i + 1]) > -1) {
+                chars[i] = TRANSLATED_CHAR;
+                chars[i + 1] = Character.toLowerCase(chars[i + 1]);
+            }
+        }
+
+        return new String(chars);
+    }
+
+    /**
+     * This creates a SLF4J logger. In the process it initializes the SLF4J service provider. This method looks
+     * for the provider in the plugin jar instead of in the server jar when creating a Logger. The provider is only
+     * initialized once, so this method should be called early.
+     * <p>
+     * The provider is bound to the service class `SLF4JServiceProvider`. Relocating this class makes it available
+     * for exclusive own usage. Other dependencies will use the relocated service too, and therefore will find the
+     * initialized provider.
+     *
+     * @param parent JDK logger
+     * @return slf4j logger
+     */
+    public static Logger initializeLoggerService(java.util.logging.Logger parent) {
+        // set the class loader to the plugin one to find our own SLF4J provider in the plugin jar and not in the global
+        ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
+
+        ClassLoader pluginLoader = CommonUtil.class.getClassLoader();
+        Thread.currentThread().setContextClassLoader(pluginLoader);
+
+        // Trigger provider search
+        LoggerFactory.getLogger(parent.getName()).info("Initialize logging service");
+        try {
+            parent.setLevel(Level.ALL);
+            return createJDKLogger(parent);
+        } catch (IllegalAccessException | InstantiationException | InvocationTargetException
+                 | NoSuchMethodException reflectEx) {
+            parent.log(Level.WARNING, "Cannot create slf4j logging adapter", reflectEx);
+            parent.log(Level.WARNING, "Creating logger instance manually...");
+            return LoggerFactory.getLogger(parent.getName());
+        } finally {
+            // restore previous class loader
+            Thread.currentThread().setContextClassLoader(oldLoader);
+        }
+    }
+
+    protected static JDK14LoggerAdapter createJDKLogger(java.util.logging.Logger parent)
+            throws NoSuchMethodException, InstantiationException, IllegalAccessException, InvocationTargetException {
+        Class<JDK14LoggerAdapter> adapterClass = JDK14LoggerAdapter.class;
+        Constructor<JDK14LoggerAdapter> cons = adapterClass.getDeclaredConstructor(java.util.logging.Logger.class);
+        cons.setAccessible(true);
+        return cons.newInstance(parent);
+    }
+
+    private CommonUtil() {
+        throw new RuntimeException("No instantiation of utility classes allowed");
+    }
+}

core/src/main/java/com/github/games647/fastlogin/core/PremiumStatus.java

@@ -0,0 +1,45 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core;
+
+public enum PremiumStatus {
+
+    PREMIUM("Premium"),
+
+    CRACKED("Cracked"),
+
+    UNKNOWN("Unknown");
+
+    private final String readableName;
+
+    PremiumStatus(String readableName) {
+        this.readableName = readableName;
+    }
+
+    public String getReadableName() {
+        return readableName;
+    }
+}

core/src/main/java/com/github/games647/fastlogin/core/ProxyAgnosticMojangResolver.java

@@ -0,0 +1,81 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core;
+
+import com.github.games647.craftapi.model.auth.Verification;
+import com.github.games647.craftapi.resolver.MojangResolver;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.InetAddress;
+import java.util.Optional;
+
+/**
+ * An extension to {@link MojangResolver} which allows connection using transparent reverse proxies.
+ * The significant difference is that unlike MojangResolver from the CraftAPI implementation, which sends the
+ * "ip" parameter when the hostIp parameter is an IPv4 address, but skips it for IPv6, this implementation leaves out
+ * the "ip" parameter also for IPv4, effectively enabling transparent proxies to work.
+ *
+ * @author games647, Enginecrafter77
+ */
+public class ProxyAgnosticMojangResolver extends MojangResolver {
+
+    private static final String HOST = "sessionserver.mojang.com";
+
+    /**
+     * A formatting string containing a URL used to call the {@code hasJoined} method on mojang session servers.
+     * <p>
+     * Formatting parameters:
+     * 1. The username of the player in question
+     * 2. The serverId of this server
+     */
+    public static final String ENDPOINT = "https://" + HOST + "/session/minecraft/hasJoined?username=%s&serverId=%s";
+
+    @Override
+    public Optional<Verification> hasJoined(String username, String serverHash, InetAddress hostIp)
+        throws IOException {
+        String url = String.format(ENDPOINT, username, serverHash);
+
+        HttpURLConnection conn = this.getConnection(url);
+        int responseCode = conn.getResponseCode();
+
+        Verification verification = null;
+
+        // Mojang session servers send HTTP 204 (NO CONTENT) when the authentication seems invalid
+        // If that's not our case, the authentication is valid, and so we can parse the response.
+        if (responseCode != HttpURLConnection.HTTP_NO_CONTENT) {
+            verification = this.parseRequest(conn, this::parseVerification);
+        }
+
+        return Optional.ofNullable(verification);
+    }
+
+    // Functional implementation of InputStreamAction, used in hasJoined method in parseRequest call
+    protected Verification parseVerification(InputStream input) throws IOException {
+        return this.readJson(input, Verification.class);
+    }
+}

core/src/main/java/com/github/games647/fastlogin/core/antibot/AntiBotService.java

@@ -0,0 +1,62 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core.antibot;
+
+import org.slf4j.Logger;
+
+import java.net.InetSocketAddress;
+
+public class AntiBotService {
+
+    private final Logger logger;
+
+    private final RateLimiter rateLimiter;
+    private final Action limitReachedAction;
+
+    public AntiBotService(Logger logger, RateLimiter rateLimiter, Action limitReachedAction) {
+        this.logger = logger;
+
+        this.rateLimiter = rateLimiter;
+        this.limitReachedAction = limitReachedAction;
+    }
+
+    public Action onIncomingConnection(InetSocketAddress clientAddress, String username) {
+        if (!rateLimiter.tryAcquire()) {
+            logger.warn("Anti-Bot join limit - Ignoring {}", clientAddress);
+            return limitReachedAction;
+        }
+
+        return Action.Continue;
+    }
+
+    public enum Action {
+        Ignore,
+
+        Block,
+
+        Continue
+    }
+}

core/src/main/java/com/github/games647/fastlogin/core/antibot/RateLimiter.java

@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core.antibot;
+
+@FunctionalInterface
+public interface RateLimiter {
+
+    boolean tryAcquire();
+}

core/src/main/java/com/github/games647/fastlogin/core/antibot/TickingRateLimiter.java

@@ -0,0 +1,152 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core.antibot;
+
+import com.google.common.base.Ticker;
+
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Limit the number of requests with a maximum size. Each requests expire after the specified time making it available
+ * for another request.
+ */
+public class TickingRateLimiter implements RateLimiter {
+
+    private final Ticker ticker;
+
+    // amount of milliseconds to expire
+    private final long expireTime;
+
+    // total request limit
+    private final int requestLimit;
+
+    private final Deque<TimeRecord> records;
+    private int totalRequests;
+
+    public TickingRateLimiter(Ticker ticker, int maxLimit, long expireTime) {
+        this.ticker = ticker;
+
+        this.requestLimit = maxLimit;
+        this.expireTime = expireTime;
+
+        records = new ArrayDeque<>(10);
+    }
+
+    /**
+     * Ask if access is allowed. If so register the request.
+     *
+     * @return true if allowed - false otherwise without any side effects
+     */
+    @Override
+    public boolean tryAcquire() {
+        // current time millis is not monotonic - it can jump back depending on user choice or NTP
+        long nowMilli = ticker.read() / 1_000_000;
+        synchronized (this) {
+            // having synchronized will limit the amount of concurrency a lot
+            TimeRecord oldest = records.peekFirst();
+            if (oldest != null && oldest.hasExpired(nowMilli)) {
+                records.pop();
+                totalRequests -= oldest.getRequestCount();
+            }
+
+            // total requests reached block any further requests
+            if (totalRequests >= requestLimit) {
+                return false;
+            }
+
+            TimeRecord latest = records.peekLast();
+            if (latest == null) {
+                // empty list - add new record
+                records.add(new TimeRecord(nowMilli, expireTime));
+                totalRequests++;
+                return true;
+            }
+
+            int res = latest.compareTo(nowMilli);
+            if (res < 0) {
+                // now is before than the record means time jumps
+                throw new IllegalStateException("Time jumped back");
+            }
+
+            if (res == 0) {
+                // same minute record
+                latest.hit();
+                totalRequests++;
+                return true;
+            }
+
+            // now is one minute newer
+            records.add(new TimeRecord(nowMilli, expireTime));
+            totalRequests++;
+            return true;
+        }
+    }
+
+    private static class TimeRecord implements Comparable<TimeRecord> {
+
+        private final long firstMinuteRecord;
+        private final long expireTime;
+        private int count;
+
+        TimeRecord(long firstMinuteRecord, long expireTime) {
+            this.firstMinuteRecord = firstMinuteRecord;
+            this.expireTime = expireTime;
+            this.count = 1;
+        }
+
+        public void hit() {
+            count++;
+        }
+
+        public int getRequestCount() {
+            return count;
+        }
+
+        public boolean hasExpired(long now) {
+            return firstMinuteRecord + expireTime <= now;
+        }
+
+        public int compareTo(long other) {
+            if (other < firstMinuteRecord) {
+                // other is earlier
+                return -1;
+            }
+
+            if (other > firstMinuteRecord + TimeUnit.MINUTES.toMillis(1)) {
+                return +1;
+            }
+
+            return 0;
+        }
+
+        @Override
+        public int compareTo(TimeRecord other) {
+            return compareTo(other.firstMinuteRecord);
+        }
+    }
+}

core/src/main/java/com/github/games647/fastlogin/core/hooks/AuthPlugin.java

@@ -0,0 +1,87 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core.hooks;
+
+/**
+ * Represents a supporting authentication plugin in BungeeCord and Bukkit/Spigot/... servers
+ *
+ * @param <P> either {@link org.bukkit.entity.Player} for Bukkit or {@link net.md_5.bungee.api.connection.ProxiedPlayer}
+ *           for BungeeCord
+ */
+public interface AuthPlugin<P> {
+
+    String ALREADY_AUTHENTICATED = "Player {} is already authenticated. Cancelling force login.";
+
+    /**
+     * Login the premium (paid account) player after the player joined successfully the server.
+     * <p>
+     * <strong>This operation will be performed async while the player successfully
+     * joined the server.</strong>
+     *
+     * @param player the player that needs to be logged in
+     * @return if the operation was successful
+     */
+    boolean forceLogin(P player);
+
+    /**
+     * Forces a register in order to protect the paid account.
+     * <p>
+     * <strong>This operation will be performed async while the player successfully
+     * joined the server.</strong>
+     * <p>
+     * After a successful registration the player should be logged
+     * in too.
+     * <p>
+     * The method will be called only for premium accounts.
+     * So it's recommended to set additionally premium property
+     * if possible.
+     * <p>
+     * Background: If we don't register an account, cracked players
+     * could steal the unregistered account from the paid
+     * player account
+     *
+     * @param player the premium account
+     * @param password a strong random generated password
+     * @return if the operation was successful
+     */
+    boolean forceRegister(P player, String password);
+
+    /**
+     * Checks whether an account exists for this player name.
+     * <p>
+     * This check should check if a cracked player account exists,
+     * so we can be sure the premium player doesn't steal the account
+     * of that player.
+     * <p>
+     * This operation will be performed async while the player is
+     * connecting.
+     *
+     * @param playerName player name
+     * @return if the player has an account
+     * @throws Exception if an error occurred
+     */
+    boolean isRegistered(String playerName) throws Exception;
+}

core/src/main/java/com/github/games647/fastlogin/core/hooks/DefaultPasswordGenerator.java

@@ -0,0 +1,50 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.github.games647.fastlogin.core.hooks;
+
+import java.security.SecureRandom;
+import java.util.Random;
+import java.util.stream.IntStream;
+
+public class DefaultPasswordGenerator<P> implements PasswordGenerator<P> {
+
+    private static final int PASSWORD_LENGTH = 8;
+    private static final char[] PASSWORD_CHARACTERS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+            .toCharArray();
+
+    private final Random random = new SecureRandom();
+
+    @Override
+    public String getRandomPassword(P player) {
+        StringBuilder generatedPassword = new StringBuilder(8);
+        IntStream.rangeClosed(1, PASSWORD_LENGTH)
+                .map(i -> random.nextInt(PASSWORD_CHARACTERS.length - 1))
+                .mapToObj(pos -> PASSWORD_CHARACTERS[pos])
+                .forEach(generatedPassword::append);
+
+        return generatedPassword.toString();
+    }
+}