mirror of
https://github.com/PaperMC/Paper.git
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90fe0d58a5
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: 897a0a23 SPIGOT-5753: Back PotionType by a minecraft registry 255b2aa1 SPIGOT-7080: Add World#locateNearestBiome ff984826 Remove javadoc.io doc links CraftBukkit Changes: 71b0135cc SPIGOT-5753: Back PotionType by a minecraft registry a6bcb8489 SPIGOT-7080: Add World#locateNearestBiome ad0e57434 SPIGOT-7502: CraftMetaItem - cannot deserialize BlockStateTag b3efca57a SPIGOT-6400: Use Mockito instead of InvocationHandler 38c599f9d PR-1272: Only allow one entity in CraftItem instead of two f065271ac SPIGOT-7498: ChunkSnapshot.getBlockEmittedLight() gets 64 blocks upper in Overworld Spigot Changes: e0e223fe Remove javadoc.io doc links
71 lines
3.8 KiB
Diff
71 lines
3.8 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 58321faf05c9fbeaf4b417e2749b190ad2a33f60..52f1fcbe104e75e4413e90e77bfc0a93294dd1c6 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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@@ -61,6 +61,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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public GameProfile authenticatedProfile; // Paper - public
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private final String serverId;
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private ServerPlayer player; // CraftBukkit
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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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@@ -132,10 +133,38 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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return this.requestedUsername != null ? this.requestedUsername + " (" + s + ")" : s;
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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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this.requestedUsername = packet.name();
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GameProfile gameprofile = this.server.getSingleplayerProfile();
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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 c493f883940819913f0cecb5e374fe94123df24c..d5d83e605a33d2edd1c7c0ef7cfa8af35e22dcc9 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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@@ -660,7 +660,7 @@ 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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