From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Dreeam <61569423+Dreeam-qwq@users.noreply.github.com>
Date: Wed, 12 Oct 2022 14:36:58 -0400
Subject: [PATCH] Remove Mojang username check


diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index badb262810effd22ca1ba021a1e746a777a19cbc..9baf55e9c3259aed431022a50c12d4f215c3ed80 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -253,10 +253,10 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
     public void handleHello(ServerboundHelloPacket packet) {
         // Gale start - JettPack - reduce array allocations
         Validate.validState(this.state == ServerLoginPacketListenerImpl.State.HELLO, "Unexpected hello packet", ArrayConstants.emptyObjectArray);
-        Validate.validState(ServerLoginPacketListenerImpl.isValidUsername(packet.name()), "Invalid characters in username", ArrayConstants.emptyObjectArray);
+        if (!org.dreeam.leaf.LeafConfig.removeMojangUsernameCheck) Validate.validState(ServerLoginPacketListenerImpl.isValidUsername(packet.name()), "Invalid characters in username", ArrayConstants.emptyObjectArray); // Leaf - Remove Mojang's username check
         // Gale end - JettPack - reduce array allocations
         // Paper start - validate usernames
-        if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode() && io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.performUsernameValidation) {
+        if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode() && io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.performUsernameValidation && !org.dreeam.leaf.LeafConfig.removeMojangUsernameCheck) { // Leaf - Remove Mojang's username check
             if (!this.iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation && !validateUsername(packet.name())) {
                 ServerLoginPacketListenerImpl.this.disconnect("Failed to verify username!");
                 return;
diff --git a/src/main/java/org/dreeam/leaf/LeafConfig.java b/src/main/java/org/dreeam/leaf/LeafConfig.java
index 80a196442edbc6b4eb44bb6a405100871aea2f6a..1e9a440d790bdd521c58dfc9c1575e2759006d02 100644
--- a/src/main/java/org/dreeam/leaf/LeafConfig.java
+++ b/src/main/java/org/dreeam/leaf/LeafConfig.java
@@ -169,7 +169,11 @@ public class LeafConfig {
         serverModName = getString("server-mod-name", serverModName);
     }
 
+    public static boolean removeMojangUsernameCheck = true;
     private static void removal() {
+        removeMojangUsernameCheck = getBoolean("remove-Mojang-username-check", removeMojangUsernameCheck,
+                "Remove username check of Mojang",
+                "enabling all characters as username");
     }
 
     public static boolean enableAsyncMobSpawning = true;