Added option for limiting password length.

src/main/java/org/samo_lego/simpleauth/commands/ChangepwCommand.java

@@ -55,6 +55,18 @@ public class ChangepwCommand {
             return 0;
         }
         else if (AuthHelper.checkPass(player.getUuidAsString(), oldPass.toCharArray())) {
+            if(newPass.length() < SimpleAuth.config.main.minPasswordChars) {
+                player.sendMessage(new LiteralText(
+                        String.format(SimpleAuth.config.lang.minPasswordChars, SimpleAuth.config.main.minPasswordChars)
+                ));
+                return 0;
+            }
+            else if(newPass.length() > SimpleAuth.config.main.maxPasswordChars && SimpleAuth.config.main.maxPasswordChars != -1) {
+                player.sendMessage(new LiteralText(
+                        String.format(SimpleAuth.config.lang.maxPasswordChars, SimpleAuth.config.main.maxPasswordChars)
+                ));
+                return 0;
+            }
             SimpleAuth.db.update(
                     player.getUuidAsString(),
                     null,

src/main/java/org/samo_lego/simpleauth/commands/LoginCommand.java

@@ -44,7 +44,6 @@ public class LoginCommand {
             return 0;
         }
         else if(SimpleAuth.deauthenticatedUsers.get(player) >= maxLoginTries && maxLoginTries != -1) {
-            SimpleAuth.deauthenticatePlayer(player);
             player.networkHandler.disconnect(loginTriesExceeded);
             return 0;
         }
@@ -60,7 +59,6 @@ public class LoginCommand {
         }
         // Kicking the player out
         else if(maxLoginTries == 1) {
-            SimpleAuth.deauthenticatePlayer(player);
             player.networkHandler.disconnect(wrongPassword);
             return 0;
         }

src/main/java/org/samo_lego/simpleauth/commands/RegisterCommand.java

@@ -7,7 +7,6 @@ import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.text.LiteralText;
 import net.minecraft.text.Text;
 import org.samo_lego.simpleauth.SimpleAuth;
-import org.samo_lego.simpleauth.utils.AuthConfig;
 import org.samo_lego.simpleauth.utils.AuthHelper;
 
 import static com.mojang.brigadier.arguments.StringArgumentType.getString;
@@ -50,6 +49,18 @@ public class RegisterCommand {
             return 0;
         }
         else if(pass1.equals(pass2)) {
+            if(pass1.length() < SimpleAuth.config.main.minPasswordChars) {
+                player.sendMessage(new LiteralText(
+                        String.format(SimpleAuth.config.lang.minPasswordChars, SimpleAuth.config.main.minPasswordChars)
+                ));
+                return 0;
+            }
+            else if(pass1.length() > SimpleAuth.config.main.maxPasswordChars && SimpleAuth.config.main.maxPasswordChars != -1) {
+                player.sendMessage(new LiteralText(
+                        String.format(SimpleAuth.config.lang.maxPasswordChars, SimpleAuth.config.main.maxPasswordChars)
+                ));
+                return 0;
+            }
             String hash = AuthHelper.hashPass(pass1.toCharArray());
             if (SimpleAuth.db.registerUser(player.getUuidAsString(), source.getName(), hash)) {
                 SimpleAuth.authenticatePlayer(player, registerSuccess);

src/main/java/org/samo_lego/simpleauth/utils/AuthConfig.java

@@ -66,6 +66,9 @@ public class AuthConfig {
         public String globalPassword = null;
         // Tries to rescue players if they are stuck inside a portal on logging in
         public boolean tryPortalRescue = true;
+        // Minimum and maximum length of password. Set -1 to disable max chars
+        public int minPasswordChars = 4;
+        public int maxPasswordChars = -1;
     }
     public static class LangConfig {
         public String enterPassword = "§6You need to enter your password!";
@@ -90,6 +93,8 @@ public class AuthConfig {
         public String accountDeleted = "§aYour account was successfully deleted!";
         public String configurationReloaded = "§aConfiguration file was reloaded successfully.";
         public String successfulPortalRescue = "§aYou were rescued from nether portal successfully!";
+        public String maxPasswordChars = "§6Password can be at most %d characters long!";
+        public String minPasswordChars = "§6Password needs to be at least %d characters long!";
     }
     private static final Logger LOGGER = LogManager.getLogger();
     private static final Gson gson = new GsonBuilder()