88 lines
4.6 KiB
Diff
88 lines
4.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
|
|
Date: Sat, 1 Jan 2022 05:19:37 -0800
|
|
Subject: [PATCH] Validate usernames
|
|
|
|
|
|
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
index d5aa95846e7f52108a03e3731023527281b21d73..1d3cc8836d2ccbec4a8660f86501be35c76e8b0b 100644
|
|
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
@@ -493,6 +493,12 @@ public class PaperConfig {
|
|
set("settings.unsupported-settings.allow-tnt-duplication", null);
|
|
}
|
|
|
|
+ public static boolean performUsernameValidation;
|
|
+ private static void performUsernameValidation() {
|
|
+ performUsernameValidation = getBoolean("settings.unsupported-settings.perform-username-validation", true);
|
|
+ }
|
|
+
|
|
+
|
|
public static int playerAutoSaveRate = -1;
|
|
public static int maxPlayerAutoSavePerTick = 10;
|
|
private static void playerAutoSaveRate() {
|
|
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
|
|
index 33a29890435d6065a2cc4f8e8bf8209c01d5d114..bb70d2b4d284727aa5dc88dd99534d09c2e38657 100644
|
|
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
|
|
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
|
|
@@ -65,6 +65,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
|
|
private ServerPlayer delayedAcceptPlayer;
|
|
public String hostname = ""; // CraftBukkit - add field
|
|
private int velocityLoginMessageId = -1; // Paper - Velocity support
|
|
+ public boolean iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation = false; // Paper - username validation overriding
|
|
|
|
public ServerLoginPacketListenerImpl(MinecraftServer server, Connection connection) {
|
|
this.state = ServerLoginPacketListenerImpl.State.HELLO;
|
|
@@ -230,10 +231,38 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
|
|
// Paper end
|
|
}
|
|
|
|
+ // Paper start - validate usernames
|
|
+ public static boolean validateUsername(String in) {
|
|
+ if (in == null || in.isEmpty() || in.length() > 16) {
|
|
+ return false;
|
|
+ }
|
|
+
|
|
+ for (int i = 0, len = in.length(); i < len; ++i) {
|
|
+ char c = in.charAt(i);
|
|
+
|
|
+ if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || (c == '_' || c == '.')) {
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ return false;
|
|
+ }
|
|
+
|
|
+ return true;
|
|
+ }
|
|
+ // Paper end - validate usernames
|
|
+
|
|
@Override
|
|
public void handleHello(ServerboundHelloPacket packet) {
|
|
Validate.validState(this.state == ServerLoginPacketListenerImpl.State.HELLO, "Unexpected hello packet", new Object[0]);
|
|
this.gameProfile = packet.getGameProfile();
|
|
+ // Paper start - validate usernames
|
|
+ if (com.destroystokyo.paper.PaperConfig.isProxyOnlineMode() && com.destroystokyo.paper.PaperConfig.performUsernameValidation) {
|
|
+ if (!this.iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation && !validateUsername(this.gameProfile.getName())) {
|
|
+ ServerLoginPacketListenerImpl.this.disconnect("Failed to verify username!");
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+ // Paper end - validate usernames
|
|
if (this.server.usesAuthentication() && !this.connection.isMemoryConnection()) {
|
|
this.state = ServerLoginPacketListenerImpl.State.KEY;
|
|
this.connection.send(new ClientboundHelloPacket("", this.server.getKeyPair().getPublic().getEncoded(), this.nonce));
|
|
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
|
|
index fe9810c3b908339ca050ed832c2e67d62cc97b0b..cd08f9b16c065be8f0eacaeba51d3e72d332daf9 100644
|
|
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
|
|
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
|
|
@@ -707,7 +707,7 @@ public abstract class PlayerList {
|
|
|
|
for (int i = 0; i < this.players.size(); ++i) {
|
|
entityplayer = (ServerPlayer) this.players.get(i);
|
|
- if (entityplayer.getUUID().equals(uuid)) {
|
|
+ if (entityplayer.getUUID().equals(uuid) || (com.destroystokyo.paper.PaperConfig.isProxyOnlineMode() && entityplayer.getGameProfile().getName().equalsIgnoreCase(gameprofile.getName()))) { // Paper - validate usernames
|
|
list.add(entityplayer);
|
|
}
|
|
}
|