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Merge pull request #36 from TehRainbowGuy/invalid-name-fix

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Prevent handshake spam from invalid names.
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md-5 2013-04-13 19:45:07 -07:00
commit 2d9c1669e4
1 changed files with 50 additions and 0 deletions
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CraftBukkit-Patches/0039-Prevent-handshake-spam-from-invalid-names.patch Normal file
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@ -0,0 +1,50 @@
From d8a60325ae53f811ad456e3b0738de3ccd02360e Mon Sep 17 00:00:00 2001
From: Benjamin James Harrison-Sims <tehrainbowguy@gmail.com>
Date: Sun, 14 Apr 2013 03:08:51 +0100
Subject: [PATCH] Prevent handshake spam from invalid names.
diff --git a/src/main/java/net/minecraft/server/Packet2Handshake.java b/src/main/java/net/minecraft/server/Packet2Handshake.java
index 343af93..aa6609b 100644
--- a/src/main/java/net/minecraft/server/Packet2Handshake.java
+++ b/src/main/java/net/minecraft/server/Packet2Handshake.java
@@ -1,5 +1,7 @@
package net.minecraft.server;
+import org.bukkit.craftbukkit.Spigot;
+
import java.io.DataInputStream;
import java.io.DataOutputStream;
@@ -19,6 +21,7 @@ public class Packet2Handshake extends Packet {
this.b = a(datainputstream, 16);
this.c = a(datainputstream, 255);
this.d = datainputstream.readInt();
+ if(!Spigot.validName.matcher(this.b).matches()) throw new IOException("Invalid name!"); // Spigot
}
public void a(DataOutputStream dataoutputstream) throws IOException { // CraftBukkit - throws IOException
diff --git a/src/main/java/org/bukkit/craftbukkit/Spigot.java b/src/main/java/org/bukkit/craftbukkit/Spigot.java
index 504bd8b..5bf5c10 100644
--- a/src/main/java/org/bukkit/craftbukkit/Spigot.java
+++ b/src/main/java/org/bukkit/craftbukkit/Spigot.java
@@ -9,6 +9,8 @@ import org.bukkit.configuration.file.YamlConfiguration;
import java.util.List;
import java.util.logging.Level;
+import java.util.regex.Pattern;
+
import net.minecraft.server.EntityPlayer;
import org.bukkit.Bukkit;
import org.spigotmc.Metrics;
@@ -25,6 +27,7 @@ public class Spigot {
private static Metrics metrics;
public static List<String> bungeeIPs;
public static int textureResolution = 16;
+ public static final Pattern validName = Pattern.compile("^[a-zA-Z0-9_]{3,16}$");
public static void initialize(CraftServer server, SimpleCommandMap commandMap, YamlConfiguration configuration) {
commandMap.register("bukkit", new org.bukkit.craftbukkit.command.TicksPerSecondCommand("tps"));
--
1.8.2.1