validate command

i know the file is a mess i will make it more modular later mabe

src/main/java/land/chipmunk/chipmunkmod/Configuration.java

@@ -2,16 +2,32 @@ package land.chipmunk.chipmunkmod;
 
 import land.chipmunk.chipmunkmod.data.BlockArea;
 import net.minecraft.util.math.BlockPos;
+import lombok.AllArgsConstructor;
 
 public class Configuration {
   public CommandManager commands = new CommandManager();
   public CommandCore core = new CommandCore();
+  public Bots bots = new Bots();
 
-  public class CommandManager {
+  public static class CommandManager {
     public String prefix = ".";
   }
 
-  public class CommandCore {
+  public static class CommandCore {
     public BlockArea relativeArea = new BlockArea(new BlockPos(0, 0, 0), new BlockPos(15, 0, 15));
   }
+
+  public static class Bots {
+    public BotInfo hbot = new BotInfo("#", null);
+    public BotInfo sbot = new BotInfo(":", null);
+    public BotInfo chipmunk = new BotInfo("'", null);
+    public BotInfo chomens = new BotInfo("*", null);
+    public BotInfo kittycorp = new BotInfo("^", null);
+  }
+
+  @AllArgsConstructor
+  public static class BotInfo {
+    public String prefix;
+    public String key;
+  }
 }

src/main/java/land/chipmunk/chipmunkmod/command/CommandManager.java

@@ -70,5 +70,6 @@ public class CommandManager {
     TestCommand.register(dispatcher);
     CoreCommand.register(dispatcher);
     UsernameCommand.register(dispatcher);
+    ValidateCommand.register(dispatcher);
   }
 }

src/main/java/land/chipmunk/chipmunkmod/commands/ValidateCommand.java

@@ -0,0 +1,141 @@
+package land.chipmunk.chipmunkmod.commands;
+
+import com.mojang.brigadier.Command;
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.context.CommandContext;
+import static land.chipmunk.chipmunkmod.command.CommandManager.literal;
+import static land.chipmunk.chipmunkmod.command.CommandManager.argument;
+import static com.mojang.brigadier.arguments.StringArgumentType.greedyString;
+import static com.mojang.brigadier.arguments.StringArgumentType.getString;
+import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
+import net.minecraft.text.Text;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.network.ClientPlayNetworkHandler;
+import java.util.Arrays;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import land.chipmunk.chipmunkmod.ChipmunkMod;
+import land.chipmunk.chipmunkmod.Configuration;
+import land.chipmunk.chipmunkmod.util.Hexadecimal;
+
+public class ValidateCommand {
+  private static final SimpleCommandExceptionType UNSPECIFIED_KEY = new SimpleCommandExceptionType(Text.literal("The key of the bot is unspecified (null), did you incorrectly add it to your config?"));
+
+  public static void register (CommandDispatcher<FabricClientCommandSource> dispatcher) {
+    dispatcher.register(
+      literal("validate")
+        .then(literal("hbot").then(argument("command", greedyString()).executes(c -> hbot(c))))
+        .then(literal("sbot").then(argument("command", greedyString()).executes(c -> sbot(c))))
+        // .then(literal("chipmunk").then(argument("command", greedyString()).executes(c -> chipmunk(c))))
+        .then(literal("chomens").then(argument("command", greedyString()).executes(c -> chomens(c))))
+        .then(literal("kittycorp").then(argument("command", greedyString()).executes(c -> kittycorp(c))))
+    );
+  }
+
+
+  public static int hbot (CommandContext<FabricClientCommandSource> context) throws CommandSyntaxException {
+    final Configuration.BotInfo info = ChipmunkMod.CONFIG.bots.hbot;
+    final String command = getString(context, "command");
+    final MinecraftClient client = context.getSource().getClient();
+    final ClientPlayNetworkHandler networkHandler = client.getNetworkHandler();
+
+    final String prefix = info.prefix;
+    final String key = info.key;
+    if (key == null) throw UNSPECIFIED_KEY.create();
+
+    try {
+      MessageDigest md = MessageDigest.getInstance("SHA-256");
+      String time = String.valueOf(System.currentTimeMillis() / 10000);
+      String input = command.replaceAll("&[0-9a-fklmnor]", "") + ";" + client.player.getUuidAsString() + ";" + time + ";" + key;
+      byte[] hash = md.digest(input.getBytes(StandardCharsets.UTF_8));
+      BigInteger bigInt = new BigInteger(1, Arrays.copyOfRange(hash, 0, 4));
+      String stringHash = bigInt.toString(Character.MAX_RADIX);
+
+      networkHandler.sendChatMessage(prefix + command + " " + stringHash);
+    } catch (NoSuchAlgorithmException e) {
+      throw new SimpleCommandExceptionType(Text.literal(e.getMessage())).create();
+    }
+
+    return Command.SINGLE_SUCCESS;
+  }
+
+  public static int sbot (CommandContext<FabricClientCommandSource> context) throws CommandSyntaxException {
+    final Configuration.BotInfo info = ChipmunkMod.CONFIG.bots.sbot;
+    final String command = getString(context, "command");
+    final MinecraftClient client = context.getSource().getClient();
+    final ClientPlayNetworkHandler networkHandler = client.getNetworkHandler();
+
+    final String prefix = info.prefix;
+    final String key = info.key;
+    if (key == null) throw UNSPECIFIED_KEY.create();
+
+    try {
+      MessageDigest md = MessageDigest.getInstance("SHA-256");
+      String time = String.valueOf(System.currentTimeMillis() / 20000);
+      String input = prefix + command.replaceAll("&[0-9a-fklmnorx]", "") + ";" + client.player.getName() + ";" + time + ";" + key;
+      byte[] hash = md.digest(input.getBytes(StandardCharsets.UTF_8));
+      BigInteger bigInt = new BigInteger(1, Arrays.copyOfRange(hash, 0, 4));
+      String stringHash = bigInt.toString(Character.MAX_RADIX);
+
+      networkHandler.sendChatMessage(prefix + command + " " + stringHash);
+    } catch (NoSuchAlgorithmException e) {
+      throw new SimpleCommandExceptionType(Text.literal(e.getMessage())).create();
+    }
+
+    return Command.SINGLE_SUCCESS;
+  }
+
+  public static int chomens (CommandContext<FabricClientCommandSource> context) throws CommandSyntaxException {
+    final Configuration.BotInfo info = ChipmunkMod.CONFIG.bots.chomens;
+    final String command = getString(context, "command");
+    final ClientPlayNetworkHandler networkHandler = context.getSource().getClient().getNetworkHandler();
+
+    final String prefix = info.prefix;
+    final String key = info.key;
+    if (key == null) throw UNSPECIFIED_KEY.create();
+
+    try {
+      MessageDigest md = MessageDigest.getInstance("SHA-256");
+      String time = String.valueOf(System.currentTimeMillis() / 10000);
+      String input = time + key;
+      byte[] hash = md.digest(input.getBytes(StandardCharsets.UTF_8));
+      String stringHash = Hexadecimal.encode(hash).substring(0, 16);
+
+      String[] arguments = command.split(" ");
+      networkHandler.sendChatMessage(prefix + arguments[0] + " " + stringHash + " " + String.join(" ", Arrays.copyOfRange(arguments, 1, arguments.length)));
+    } catch (NoSuchAlgorithmException e) {
+      throw new SimpleCommandExceptionType(Text.literal(e.getMessage())).create();
+    }
+
+    return Command.SINGLE_SUCCESS;
+  }
+
+  public static int kittycorp (CommandContext<FabricClientCommandSource> context) throws CommandSyntaxException {
+    final Configuration.BotInfo info = ChipmunkMod.CONFIG.bots.kittycorp;
+    final String command = getString(context, "command");
+    final ClientPlayNetworkHandler networkHandler = context.getSource().getClient().getNetworkHandler();
+
+    final String prefix = info.prefix;
+    final String key = info.key;
+    if (key == null) throw UNSPECIFIED_KEY.create();
+
+    try {
+      MessageDigest md = MessageDigest.getInstance("SHA-256");
+      String time = String.valueOf(System.currentTimeMillis() / 10000);
+      String input = prefix + command.replaceAll("&[0-9a-fklmnorx]", "") + ";" + time + ";" + key;
+      byte[] hash = md.digest(input.getBytes(StandardCharsets.UTF_8));
+      BigInteger bigInt = new BigInteger(1, Arrays.copyOfRange(hash, 0, 4));
+      String stringHash = bigInt.toString(Character.MAX_RADIX);
+
+      networkHandler.sendChatMessage(prefix + command + " " + stringHash);
+    } catch (NoSuchAlgorithmException e) {
+      throw new SimpleCommandExceptionType(Text.literal(e.getMessage())).create();
+    }
+
+    return Command.SINGLE_SUCCESS;
+  }
+}

src/main/java/land/chipmunk/chipmunkmod/util/Hexadecimal.java

@@ -0,0 +1,15 @@
+package land.chipmunk.chipmunkmod.util;
+
+public interface Hexadecimal {
+  static String encode (byte b) {
+    return "" + Character.forDigit((b >> 4) & 0xF, 16) + Character.forDigit((b & 0xF), 16);
+  }
+
+  static String encode (byte[] array) {
+    StringBuilder sb = new StringBuilder();
+    for (int i = 0; i < array.length; i++) sb.append(encode(array[i]));
+    return sb.toString();
+  }
+
+  // TODO: Decode
+}

src/main/resources/default_config.json

@@ -8,5 +8,13 @@
       "start": { "x": 0, "y": 0, "z": 0 },
       "end": { "x": 15, "y": 0, "z": 15 }
     }
+  },
+
+  "bots": {
+    "hbot": { "prefix": "#", "key": null },
+    "sbot": { "prefix": ":", "key": null },
+    "chipmunk": { "prefix": "'", "key": null },
+    "chomens": { "prefix": "*", "key": null },
+    "kittycorp": { "prefix": "^", "key": null }
   }
 }