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9147456fc9
Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing CraftBukkit Changes: ab8ace685 SPIGOT-7236: Bone meal doesn't increase use statistic 7dcb59b8e Avoid switch on material in previous commit Spigot Changes: 19641c75 SPIGOT-7235: World.Spigot#strikeLightningEffect doesn't do anything
71 lines
3.7 KiB
Diff
71 lines
3.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sat, 1 Jan 2022 05:19:37 -0800
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Subject: [PATCH] Validate usernames
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diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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index b6dc42aef6458b0c09007bb0e13048b99531f8c0..7e8401a05905775f7209abb1269e24aad409af50 100644
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--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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@@ -60,6 +60,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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private final String serverId;
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@Nullable
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private ServerPlayer delayedAcceptPlayer;
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+ public boolean iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation = false; // Paper - username validation overriding
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public ServerLoginPacketListenerImpl(MinecraftServer server, Connection connection) {
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this.state = ServerLoginPacketListenerImpl.State.HELLO;
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@@ -212,10 +213,38 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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// Paper end
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}
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+ // Paper start - validate usernames
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+ public static boolean validateUsername(String in) {
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+ if (in == null || in.isEmpty() || in.length() > 16) {
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+ return false;
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+ }
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+
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+ for (int i = 0, len = in.length(); i < len; ++i) {
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+ char c = in.charAt(i);
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+
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+ if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || (c == '_' || c == '.')) {
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+ continue;
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+ }
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+
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+ return false;
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+ }
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+
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+ return true;
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+ }
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+ // Paper end - validate usernames
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+
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@Override
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public void handleHello(ServerboundHelloPacket packet) {
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Validate.validState(this.state == ServerLoginPacketListenerImpl.State.HELLO, "Unexpected hello packet", new Object[0]);
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Validate.validState(ServerLoginPacketListenerImpl.isValidUsername(packet.name()), "Invalid characters in username", new Object[0]);
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+ // Paper start - validate usernames
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+ if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode() && io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.performUsernameValidation) {
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+ if (!this.iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation && !validateUsername(packet.name())) {
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+ ServerLoginPacketListenerImpl.this.disconnect("Failed to verify username!");
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+ return;
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+ }
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+ }
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+ // Paper end - validate usernames
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GameProfile gameprofile = this.server.getSingleplayerProfile();
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if (gameprofile != null && packet.name().equalsIgnoreCase(gameprofile.getName())) {
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diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
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index 3bc06377d022f6a3f6e0c2129640b6b9e04054f9..d7a5d6e548e6239f3f5a26303e03b657fc2ec8f5 100644
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--- a/src/main/java/net/minecraft/server/players/PlayerList.java
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+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
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@@ -652,7 +652,7 @@ public abstract class PlayerList {
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for (int i = 0; i < this.players.size(); ++i) {
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entityplayer = (ServerPlayer) this.players.get(i);
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- if (entityplayer.getUUID().equals(uuid)) {
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+ if (entityplayer.getUUID().equals(uuid) || (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode() && entityplayer.getGameProfile().getName().equalsIgnoreCase(gameprofile.getName()))) { // Paper - validate usernames
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list.add(entityplayer);
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}
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}
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