mirror of
https://github.com/PaperMC/Paper.git
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70 lines
4.1 KiB
Diff
70 lines
4.1 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 b968026728b8b4e549eed9fa9b43919c6c19eb7a..c44a15fc358c28345302b1bf37fc4b111a77fe0e 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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@@ -83,6 +83,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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private final String serverId;
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private final boolean transferred;
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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, boolean transferred) {
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this.state = ServerLoginPacketListenerImpl.State.HELLO;
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@@ -164,7 +165,7 @@ 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(StringUtil.isValidPlayerName(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(StringUtil.isValidPlayerName(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 d7bbdcc97745246718c92c9aba56d9f926897975..7406784899ba5f3575adf1ffe5e5d85ab430a841 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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@@ -676,7 +676,7 @@ 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/util/StringUtil.java b/src/main/java/net/minecraft/util/StringUtil.java
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index d3fc549a08993376c76c4ebebb788fea3f4ddf69..ae7ef47446c15b8a6878dd2d31b60cd0670eaf83 100644
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--- a/src/main/java/net/minecraft/util/StringUtil.java
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+++ b/src/main/java/net/minecraft/util/StringUtil.java
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@@ -64,7 +64,23 @@ public class StringUtil {
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}
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public static boolean isValidPlayerName(String name) {
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- return name.length() <= 16 && name.chars().filter(c -> c <= 32 || c >= 127).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 String filterText(String string) {
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