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https://github.com/PaperMC/Paper.git
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058d7c1aa3
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 Bukkit Changes: 13eb4146 SPIGOT-5217, SPIGOT-6183: Add RespawnReason to PlayerRespawnEvent CraftBukkit Changes: 5ee3419b7 SPIGOT-5217, SPIGOT-6183: Add RespawnReason to PlayerRespawnEvent Spigot Changes: 514cf03a Rebuild patches and add RespawnReason.PLUGIN to Player#respawn
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 ed3af916dfa875dd0a5f1e730d20d11efd6419c6..cd4e76fe5b79c7d9e615b4886a568c74db757436 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 3c3e110f7caaf42783638aac74ef5e69513d1fff..c609f63a2e0deffba852f83a5990ad5150029948 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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@@ -664,7 +664,7 @@ 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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