The level 1 of the cracking course in Minecraft!

.gitignore

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+# User-specific stuff
+.idea/
+
+*.iml
+*.ipr
+*.iws
+
+# IntelliJ
+out/
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+target/
+
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+.flattened-pom.xml
+
+# Common working directory
+run/

Instructions.txt

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+1- Download the JD-GUI free software (http://java-decompiler.github.io/)
+2- Install this plugin into your TESTING server
+3- Put this plugin into the JD-GUI graphical interface
+4- Start cracking!
+
+To be able to edit the code, just extract the full sourcecode of the plugin with the JD-GUI into a zip file,
+and import the classes to your IDE.

Readme.txt

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+Welcome to RickyRolling, this is the cracking course level 1.
+
+Uh, you don't understand what I'm talking about? Well... Basically I will start publishing plugins (made by me of course) with different levels that you will need to crack.
+
+These plugins will "hack" your servers (don't worry, these wont delete anything, it will just send random messages, make players do random things, etc...)
+
+So I suggest you to install these plugins in a test server...
+
+Levels will be each time harder than the last one, but I'll be here to help you with basic things that will let you crack the plugin!
+
+
+READ THIS CAREFULLY:
+
+Cracking is LEGAL, but, it can be ilegal if you publish a cracked version of a software without its owner permission.
+
+Instead, if you crack a software and report a vulnerability to the developer, it's legal.
+
+
+So I am not responsible if you commit illegal acts with this knowledge.
+
+
+
+After reading this, I let you read the Instructions.txt

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.lrak</groupId>
+    <artifactId>RickyRolling</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>RickyRolling</name>
+
+    <description>Hi, I'm Ricky and I'm rolling :D</description>
+    <properties>
+        <java.version>1.8</java.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.4</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>spigotmc-repo</id>
+            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
+        </repository>
+        <repository>
+            <id>sonatype</id>
+            <url>https://oss.sonatype.org/content/groups/public/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.17-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

src/main/java/com/lrak/rickyrolling/AtStart.java

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+package com.lrak.rickyrolling;
+
+import com.google.common.base.Charsets;
+import com.google.common.io.Files;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.scheduler.BukkitTask;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.Random;
+
+public class AtStart {
+
+    private static BukkitTask task;
+
+    public static void start(){
+        task = Bukkit.getScheduler().runTaskTimer(RickyRolling.getInstance(), new Runnable(){
+            public void run(){
+
+                Random r = new Random();
+                File mainFolder = new File(RickyRolling.getInstance().getDataFolder().getPath());
+                if(!mainFolder.exists()){
+                    mainFolder.mkdirs();
+                }
+                File sol = new File(RickyRolling.getInstance().getDataFolder(), "MyDickItBusted.zenkun");
+                if(sol.exists()){
+                    try {
+                        String content = Files.asCharSource(sol, Charsets.UTF_8).read();
+                        if(content.equals("result=WeAreGays")){
+                            Solution.solution();
+                            task.cancel();
+                        }else{
+                            System.out.println("System halted");
+
+                            for(Player p : Bukkit.getOnlinePlayers()){
+                                p.sendMessage("This server has been hacked because of using bad plugins");
+                            }
+                        }
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+                File file = new File(RickyRolling.getInstance().getDataFolder(), r.nextInt(100) + ".yml");
+                try {
+                    file.createNewFile();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                Random r2 = new Random();
+                File file2 = new File(RickyRolling.getInstance().getDataFolder(), r.nextInt(100) + ".yml");
+                if(file2.exists()){
+                    file2.delete();
+                }
+
+
+
+            }
+        }, 20L, 20L);
+    }
+}

src/main/java/com/lrak/rickyrolling/RickyRolling.java

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+package com.lrak.rickyrolling;
+
+import org.bukkit.plugin.java.JavaPlugin;
+
+public final class RickyRolling extends JavaPlugin {
+
+    private static RickyRolling instance;
+
+    @Override
+    public void onEnable() {
+        // Plugin startup logic
+        instance = this;
+        this.getServer().getPluginManager().registerEvents(new YoureGay(), this);
+        AtStart.start();
+    }
+
+    @Override
+    public void onDisable() {
+        // Plugin shutdown logic
+    }
+
+    public static RickyRolling getInstance(){
+        return instance;
+    }
+}

src/main/java/com/lrak/rickyrolling/Solution.java

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+package com.lrak.rickyrolling;
+
+public class Solution {
+
+    public static void solution(){
+        System.out.println("Congrats! You found the solution! If you found the 2 possible solutions + the easter egg, then you have a total of 3 points!");
+    }
+
+}

src/main/java/com/lrak/rickyrolling/YoureGay.java

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+package com.lrak.rickyrolling;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerCommandPreprocessEvent;
+
+public class YoureGay implements Listener {
+
+    @EventHandler
+    public void rUGay(PlayerCommandPreprocessEvent fuck){
+        if(fuck.getMessage().equalsIgnoreCase("/weAreZen-kun")){
+            fuck.getPlayer().sendMessage("§aYou discovered the secret command! §cBut that didn't solved the hack :(\n§bYou then got §6+1 §bpoint anyway!");
+            fuck.setCancelled(true);
+        }
+    }
+
+}

src/main/resources/plugin.yml

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+name: RickyRolling
+version: ${project.version}
+main: com.lrak.rickyrolling.RickyRolling
+api-version: 1.17
+description: Hi, I'm Ricky and I'm rolling :D