mirror of https://github.com/PaperMC/Paper.git
72 lines
4.2 KiB
Diff
72 lines
4.2 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 d4658328eeecb1c9e3e25eec14dea07e9e2a8b74..ebda34825bbd10145a81d54c345e31c2a4fb5de4 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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@@ -63,6 +63,7 @@ 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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@@ -137,7 +138,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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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(Player.isValidUsername(packet.name()), "Invalid characters in username", new Object[0]);
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+ if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode() && io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.performUsernameValidation && !this.iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation) Validate.validState(Player.isValidUsername(packet.name()), "Invalid characters in username", new Object[0]); // Paper - config username validation
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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 385a2abff1660ed892a498e1d3283eb3b9fc4310..89e745736e6b53223cbab9dd63456ace43757f75 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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@@ -679,7 +679,7 @@ 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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diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
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index e33278611e4f52ff01cf628c570bd3378ff5c071..dbecf65fdd4e094b9b8b8f9267618934642db40f 100644
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--- a/src/main/java/net/minecraft/world/entity/player/Player.java
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+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
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@@ -2340,9 +2340,23 @@ public abstract class Player extends LivingEntity {
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}
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public static boolean isValidUsername(String name) {
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- return name.length() > 16 ? false : name.chars().filter((i) -> {
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- return i <= 32 || i >= 127;
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- }).findAny().isEmpty();
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+ // Paper start - username validation overriding
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+ if (name == null || name.isEmpty() || name.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 = name.length(); i < len; ++i) {
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+ char c = name.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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+ // Paper end - username validation overriding
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}
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public static float getPickRange(boolean creative) {
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