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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: 01aa02eb PR-858: Add LivingEntity#playHurtAnimation() 9421320f PR-884: Refinements to new ban API for improved compatibility and correctness 37a60b45 SPIGOT-6455, SPIGOT-7030, PR-750: Improve ban API 4eeb174b All smithing inventories are now the new smithing inventory f2bb168e PR-880: Add methods to get/set FallingBlock CancelDrop e7a807fa PR-879: Add Player#sendHealthUpdate() 692b8e96 SPIGOT-7370: Remove float value conversion in plugin.yml 2d033390 SPIGOT-7403: Add direct API for waxed signs 16a08373 PR-876: Add missing Raider API and 'no action ticks' CraftBukkit Changes: b60a95c8c PR-1189: Add LivingEntity#playHurtAnimation() 95c335c63 PR-1226: Fix VehicleEnterEvent not being called for certain entities 0a0fc3bee PR-1227: Refinements to new ban API for improved compatibility and correctness 0d0b1e5dc Revert bad change to PathfinderGoalSit causing all cats to sit 648196070 SPIGOT-6455, SPIGOT-7030, PR-1054: Improve ban API 31fe848d6 All smithing inventories are now the new smithing inventory 9a919a143 SPIGOT-7416: SmithItemEvent not firing in Smithing Table 9f64f0d22 PR-1221: Add methods to get/set FallingBlock CancelDrop 3be9ac171 PR-1220: Add Player#sendHealthUpdate() c1279f775 PR-1209: Clean up various patches c432e4397 Fix Raider#setCelebrating() implementation 504d96665 SPIGOT-7403: Add direct API for waxed signs c68c1f1b3 PR-1216: Add missing Raider API and 'no action ticks' 85b89c3dd Increase outdated build delay Spigot Changes: 9ebce8af Rebuild patches 64b565e6 Rebuild patches
228 lines
13 KiB
Diff
228 lines
13 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andrew Steinborn <git@steinborn.me>
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Date: Mon, 8 Oct 2018 14:36:14 -0400
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Subject: [PATCH] Add Velocity IP Forwarding Support
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While Velocity supports BungeeCord-style IP forwarding, it is not secure. Users
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have a lot of problems setting up firewalls or setting up plugins like IPWhitelist.
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Further, the BungeeCord IP forwarding protocol still retains essentially its original
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form, when there is brand new support for custom login plugin messages in 1.13.
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Velocity's modern IP forwarding uses an HMAC-SHA256 code to ensure authenticity
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of messages, is packed into a binary format that is smaller than BungeeCord's
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forwarding, and is integrated into the Minecraft login process by using the 1.13
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login plugin message packet.
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diff --git a/src/main/java/com/destroystokyo/paper/proxy/VelocityProxy.java b/src/main/java/com/destroystokyo/paper/proxy/VelocityProxy.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..c4934979b1ed85bfc4f8d9e6f8848b2beaad95c3
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/proxy/VelocityProxy.java
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@@ -0,0 +1,75 @@
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+package com.destroystokyo.paper.proxy;
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+
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+import io.papermc.paper.configuration.GlobalConfiguration;
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+import com.google.common.net.InetAddresses;
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+import com.mojang.authlib.GameProfile;
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+import com.mojang.authlib.properties.Property;
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+import java.net.InetAddress;
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+import java.security.InvalidKeyException;
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+import java.security.MessageDigest;
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+import java.security.NoSuchAlgorithmException;
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+import java.util.UUID;
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+
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+import javax.crypto.Mac;
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+import javax.crypto.spec.SecretKeySpec;
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+import net.minecraft.network.FriendlyByteBuf;
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+import net.minecraft.resources.ResourceLocation;
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+import net.minecraft.world.entity.player.ProfilePublicKey;
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+
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+public class VelocityProxy {
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+ private static final int SUPPORTED_FORWARDING_VERSION = 1;
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+ public static final int MODERN_FORWARDING_WITH_KEY = 2;
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+ public static final int MODERN_FORWARDING_WITH_KEY_V2 = 3;
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+ public static final int MODERN_LAZY_SESSION = 4;
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+ public static final byte MAX_SUPPORTED_FORWARDING_VERSION = MODERN_LAZY_SESSION;
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+ public static final ResourceLocation PLAYER_INFO_CHANNEL = new ResourceLocation("velocity", "player_info");
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+
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+ public static boolean checkIntegrity(final FriendlyByteBuf buf) {
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+ final byte[] signature = new byte[32];
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+ buf.readBytes(signature);
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+
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+ final byte[] data = new byte[buf.readableBytes()];
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+ buf.getBytes(buf.readerIndex(), data);
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+
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+ try {
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+ final Mac mac = Mac.getInstance("HmacSHA256");
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+ mac.init(new SecretKeySpec(GlobalConfiguration.get().proxies.velocity.secret.getBytes(java.nio.charset.StandardCharsets.UTF_8), "HmacSHA256"));
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+ final byte[] mySignature = mac.doFinal(data);
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+ if (!MessageDigest.isEqual(signature, mySignature)) {
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+ return false;
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+ }
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+ } catch (final InvalidKeyException | NoSuchAlgorithmException e) {
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+ throw new AssertionError(e);
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+ }
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+
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+ return true;
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+ }
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+
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+ public static InetAddress readAddress(final FriendlyByteBuf buf) {
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+ return InetAddresses.forString(buf.readUtf(Short.MAX_VALUE));
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+ }
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+
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+ public static GameProfile createProfile(final FriendlyByteBuf buf) {
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+ final GameProfile profile = new GameProfile(buf.readUUID(), buf.readUtf(16));
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+ readProperties(buf, profile);
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+ return profile;
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+ }
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+
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+ private static void readProperties(final FriendlyByteBuf buf, final GameProfile profile) {
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+ final int properties = buf.readVarInt();
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+ for (int i1 = 0; i1 < properties; i1++) {
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+ final String name = buf.readUtf(Short.MAX_VALUE);
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+ final String value = buf.readUtf(Short.MAX_VALUE);
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+ final String signature = buf.readBoolean() ? buf.readUtf(Short.MAX_VALUE) : null;
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+ profile.getProperties().put(name, new Property(name, value, signature));
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+ }
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+ }
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+
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+ public static ProfilePublicKey.Data readForwardedKey(FriendlyByteBuf buf) {
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+ return new ProfilePublicKey.Data(buf);
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+ }
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+
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+ public static UUID readSignerUuidOrElse(FriendlyByteBuf buf, UUID orElse) {
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+ return buf.readBoolean() ? buf.readUUID() : orElse;
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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index 8115cf64a30b6438721769df6045e1b77acf88ce..9f422cbeaa52b3e6a0a27af4f8ad4ddb7808483f 100644
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--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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@@ -274,13 +274,20 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
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server.enablePlugins(org.bukkit.plugin.PluginLoadOrder.STARTUP);
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// CraftBukkit end
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+ // Paper start
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+ boolean usingProxy = org.spigotmc.SpigotConfig.bungee || io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled;
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+ String proxyFlavor = (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled) ? "Velocity" : "BungeeCord";
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+ String proxyLink = (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled) ? "https://docs.papermc.io/velocity/security" : "http://www.spigotmc.org/wiki/firewall-guide/";
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+ // Paper end
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if (!this.usesAuthentication()) {
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DedicatedServer.LOGGER.warn("**** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!");
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DedicatedServer.LOGGER.warn("The server will make no attempt to authenticate usernames. Beware.");
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// Spigot start
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- if (org.spigotmc.SpigotConfig.bungee) {
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- DedicatedServer.LOGGER.warn("Whilst this makes it possible to use BungeeCord, unless access to your server is properly restricted, it also opens up the ability for hackers to connect with any username they choose.");
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- DedicatedServer.LOGGER.warn("Please see http://www.spigotmc.org/wiki/firewall-guide/ for further information.");
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+ // Paper start
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+ if (usingProxy) {
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+ DedicatedServer.LOGGER.warn("Whilst this makes it possible to use " + proxyFlavor + ", unless access to your server is properly restricted, it also opens up the ability for hackers to connect with any username they choose.");
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+ DedicatedServer.LOGGER.warn("Please see " + proxyLink + " for further information.");
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+ // Paper end
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} else {
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DedicatedServer.LOGGER.warn("While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.");
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}
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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 3fcd7bfdb8945b276c94a263e9da6b85ce470366..3431b1132e55c53cda7cf47f021f23068b63322d 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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@Nullable
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private ServerPlayer delayedAcceptPlayer;
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public boolean iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation = false; // Paper - username validation overriding
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+ private int velocityLoginMessageId = -1; // Paper - Velocity support
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public ServerLoginPacketListenerImpl(MinecraftServer server, Connection connection) {
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this.state = ServerLoginPacketListenerImpl.State.HELLO;
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@@ -256,6 +257,16 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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this.state = ServerLoginPacketListenerImpl.State.KEY;
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this.connection.send(new ClientboundHelloPacket("", this.server.getKeyPair().getPublic().getEncoded(), this.challenge));
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} else {
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+ // Paper start - Velocity support
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+ if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled) {
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+ this.velocityLoginMessageId = java.util.concurrent.ThreadLocalRandom.current().nextInt();
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+ net.minecraft.network.FriendlyByteBuf buf = new net.minecraft.network.FriendlyByteBuf(io.netty.buffer.Unpooled.buffer());
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+ buf.writeByte(com.destroystokyo.paper.proxy.VelocityProxy.MAX_SUPPORTED_FORWARDING_VERSION);
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+ net.minecraft.network.protocol.login.ClientboundCustomQueryPacket packet1 = new net.minecraft.network.protocol.login.ClientboundCustomQueryPacket(this.velocityLoginMessageId, com.destroystokyo.paper.proxy.VelocityProxy.PLAYER_INFO_CHANNEL, buf);
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+ this.connection.send(packet1);
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+ return;
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+ }
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+ // Paper end
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// Spigot start
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// Paper start - Cache authenticator threads
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authenticatorPool.execute(new Runnable() {
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@@ -363,6 +374,12 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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public class LoginHandler {
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public void fireEvents() throws Exception {
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+ // Paper start - Velocity support
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+ if (ServerLoginPacketListenerImpl.this.velocityLoginMessageId == -1 && io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled) {
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+ disconnect("This server requires you to connect with Velocity.");
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+ return;
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+ }
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+ // Paper end
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String playerName = ServerLoginPacketListenerImpl.this.gameProfile.getName();
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java.net.InetAddress address = ((java.net.InetSocketAddress) ServerLoginPacketListenerImpl.this.connection.getRemoteAddress()).getAddress();
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java.net.InetAddress rawAddress = ((java.net.InetSocketAddress) connection.channel.remoteAddress()).getAddress(); // Paper
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@@ -411,6 +428,47 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
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// Spigot end
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public void handleCustomQueryPacket(ServerboundCustomQueryPacket packet) {
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+ // Paper start - Velocity support
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+ if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled && packet.getTransactionId() == this.velocityLoginMessageId) {
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+ net.minecraft.network.FriendlyByteBuf buf = packet.getData();
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+ if (buf == null) {
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+ this.disconnect("This server requires you to connect with Velocity.");
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+ return;
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+ }
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+
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+ if (!com.destroystokyo.paper.proxy.VelocityProxy.checkIntegrity(buf)) {
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+ this.disconnect("Unable to verify player details");
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+ return;
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+ }
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+
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+ int version = buf.readVarInt();
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+ if (version > com.destroystokyo.paper.proxy.VelocityProxy.MAX_SUPPORTED_FORWARDING_VERSION) {
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+ throw new IllegalStateException("Unsupported forwarding version " + version + ", wanted upto " + com.destroystokyo.paper.proxy.VelocityProxy.MAX_SUPPORTED_FORWARDING_VERSION);
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+ }
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+
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+ java.net.SocketAddress listening = this.connection.getRemoteAddress();
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+ int port = 0;
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+ if (listening instanceof java.net.InetSocketAddress) {
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+ port = ((java.net.InetSocketAddress) listening).getPort();
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+ }
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+ this.connection.address = new java.net.InetSocketAddress(com.destroystokyo.paper.proxy.VelocityProxy.readAddress(buf), port);
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+
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+ this.gameProfile = com.destroystokyo.paper.proxy.VelocityProxy.createProfile(buf);
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+
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+ //TODO Update handling for lazy sessions, might not even have to do anything?
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+
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+ // Proceed with login
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+ authenticatorPool.execute(() -> {
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+ try {
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+ new LoginHandler().fireEvents();
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+ } catch (Exception ex) {
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+ disconnect("Failed to verify username!");
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+ server.server.getLogger().log(java.util.logging.Level.WARNING, "Exception verifying " + gameProfile.getName(), ex);
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+ }
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+ });
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+ return;
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+ }
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+ // Paper end
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this.disconnect(Component.translatable("multiplayer.disconnect.unexpected_query_response"));
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index 295d6bec7b2fc943197b315ebd09b159ea670a79..7f955f8a42b6c917dbd6f3533927a7295c1c5e20 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -800,7 +800,7 @@ public final class CraftServer implements Server {
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@Override
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public long getConnectionThrottle() {
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// Spigot Start - Automatically set connection throttle for bungee configurations
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- if (org.spigotmc.SpigotConfig.bungee) {
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+ if (org.spigotmc.SpigotConfig.bungee || io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled) { // Paper - Velocity support
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return -1;
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} else {
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return this.configuration.getInt("settings.connection-throttle");
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