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ef0e5a642d
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: 9ae3f10f SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API 48c0c547 PR-786: Add methods to get sounds from entities CraftBukkit Changes: 5cc9c022a SPIGOT-7152: Handle hand item changing during air interact event 4ffa1acf6 SPIGOT-7154: Players get kicked when interacting with a conversation 4daa21123 SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API e5d6a9bbf PR-1100: Add methods to get sounds from entities b7e9f1c8b SPIGOT-7146: Reduce use of Material switch in ItemMeta Spigot Changes: 4c157bb4 Rebuild patches
212 lines
12 KiB
Diff
212 lines
12 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..5de2dabbc076a9482b1d6c299f1cff74313af74e
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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 +1,74 @@
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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 byte MAX_SUPPORTED_FORWARDING_VERSION = MODERN_FORWARDING_WITH_KEY_V2;
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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/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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index 2f0b2d0f3a3dc02076cee9ab5e6dd6ab931143e3..bf488013e45b9ab97568e587f4dad899498b2f73 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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@@ -67,6 +67,7 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
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private ProfilePublicKey.Data profilePublicKeyData;
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public String hostname = ""; // CraftBukkit - add field
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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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@@ -300,6 +301,16 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
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this.state = ServerLoginPacketListenerImpl.State.KEY;
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this.connection.send(new ClientboundHelloPacket("", this.server.getKeyPair().getPublic().getEncoded(), this.nonce));
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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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@@ -413,6 +424,12 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
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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.getRawAddress()).getAddress(); // Paper
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@@ -461,6 +478,60 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
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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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+ // We should already have this, but, we'll read it out anyway
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+ //noinspection NonStrictComparisonCanBeEquality
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+ if (version >= com.destroystokyo.paper.proxy.VelocityProxy.MODERN_FORWARDING_WITH_KEY_V2) {
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+ final ProfilePublicKey.Data forwardedKeyData = com.destroystokyo.paper.proxy.VelocityProxy.readForwardedKey(buf);
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+ final UUID signer = com.destroystokyo.paper.proxy.VelocityProxy.readSignerUuidOrElse(buf, this.gameProfile.getId());
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+ if (this.profilePublicKeyData == null) {
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+ try {
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+ ServerLoginPacketListenerImpl.validatePublicKey(forwardedKeyData, signer, this.server.getServiceSignatureValidator(), this.server.enforceSecureProfile());
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+ this.profilePublicKeyData = forwardedKeyData;
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+ } catch (ProfilePublicKey.ValidationException err) {
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+ this.disconnect("Unable to validate forwarded player key");
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+ }
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+ }
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+ }
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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 3c9ba17cd0f016a21f56c6b6f8861c512734637a..b443aba38258f501f8f00be6b055f07b709277c4 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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@@ -784,7 +784,7 @@ 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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