diff options
Diffstat (limited to 'patches/server/0976-Prevent-sending-oversized-item-data-in-equipment-and.patch')
| -rw-r--r-- | patches/server/0976-Prevent-sending-oversized-item-data-in-equipment-and.patch | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/patches/server/0976-Prevent-sending-oversized-item-data-in-equipment-and.patch b/patches/server/0976-Prevent-sending-oversized-item-data-in-equipment-and.patch new file mode 100644 index 0000000000..077dab00a8 --- /dev/null +++ b/patches/server/0976-Prevent-sending-oversized-item-data-in-equipment-and.patch @@ -0,0 +1,228 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Nassim Jahnke <[email protected]> +Date: Wed, 1 Dec 2021 12:36:25 +0100 +Subject: [PATCH] Prevent sending oversized item data in equipment and metadata + +Co-authored-by: Jake Potrebic <[email protected]> + +diff --git a/src/main/java/io/papermc/paper/util/DataSanitizationUtil.java b/src/main/java/io/papermc/paper/util/DataSanitizationUtil.java +new file mode 100644 +index 0000000000000000000000000000000000000000..e9436f8a73ee0a02096d66e14d73edaae28d5a41 +--- /dev/null ++++ b/src/main/java/io/papermc/paper/util/DataSanitizationUtil.java +@@ -0,0 +1,100 @@ ++package io.papermc.paper.util; ++ ++import java.util.ArrayList; ++import java.util.List; ++import java.util.concurrent.atomic.AtomicBoolean; ++import java.util.function.UnaryOperator; ++import net.minecraft.network.RegistryFriendlyByteBuf; ++import net.minecraft.network.codec.StreamCodec; ++import net.minecraft.world.item.ItemStack; ++import net.minecraft.world.item.Items; ++import net.minecraft.world.item.component.BundleContents; ++import net.minecraft.world.item.component.ChargedProjectiles; ++import net.minecraft.world.item.component.ItemContainerContents; ++import org.checkerframework.checker.nullness.qual.NonNull; ++import org.checkerframework.framework.qual.DefaultQualifier; ++ ++@DefaultQualifier(NonNull.class) ++public final class DataSanitizationUtil { ++ ++ private static final ThreadLocal<DataSanitizer> DATA_SANITIZER = ThreadLocal.withInitial(DataSanitizer::new); ++ ++ public static DataSanitizer start(final boolean sanitize) { ++ final DataSanitizer sanitizer = DATA_SANITIZER.get(); ++ if (sanitize) { ++ sanitizer.start(); ++ } ++ return sanitizer; ++ } ++ ++ public static final StreamCodec<RegistryFriendlyByteBuf, ChargedProjectiles> CHARGED_PROJECTILES = codec(ChargedProjectiles.STREAM_CODEC, DataSanitizationUtil::sanitizeChargedProjectiles); ++ public static final StreamCodec<RegistryFriendlyByteBuf, BundleContents> BUNDLE_CONTENTS = codec(BundleContents.STREAM_CODEC, DataSanitizationUtil::sanitizeBundleContents); ++ public static final StreamCodec<RegistryFriendlyByteBuf, ItemContainerContents> CONTAINER = codec(ItemContainerContents.STREAM_CODEC, contents -> ItemContainerContents.EMPTY); ++ ++ private static ChargedProjectiles sanitizeChargedProjectiles(final ChargedProjectiles projectiles) { ++ if (projectiles.isEmpty()) { ++ return projectiles; ++ } ++ final List<ItemStack> items = projectiles.getItems(); ++ final List<ItemStack> sanitized = new ArrayList<>(); ++ for (int i = 0; i < Math.min(items.size(), 3); i++) { ++ // we want to preserve item type as vanilla client can change visuals based on type ++ sanitized.add(new ItemStack(items.get(i).getItemHolder())); ++ } ++ return ChargedProjectiles.of(sanitized); ++ } ++ ++ private static BundleContents sanitizeBundleContents(final BundleContents contents) { ++ // Bundles change their texture based on their fullness. ++ int sizeUsed = 0; ++ for (final ItemStack item : contents.items()) { ++ final int scale = 64 / item.getMaxStackSize(); ++ sizeUsed += scale * item.getCount(); ++ } ++ // Now we add a single fake item that uses the same amount of slots as all other items. ++ final List<ItemStack> items = new ArrayList<>(); ++ items.add(new ItemStack(Items.PAPER, sizeUsed)); ++ return new BundleContents(items); ++ } ++ ++ private static <B, A> StreamCodec<B, A> codec(final StreamCodec<B, A> delegate, final UnaryOperator<A> sanitizer) { ++ return new DataSanitizationCodec<>(delegate, sanitizer); ++ } ++ ++ private record DataSanitizationCodec<B, A>(StreamCodec<B, A> delegate, UnaryOperator<A> sanitizer) implements StreamCodec<B, A> { ++ ++ @Override ++ public @NonNull A decode(final @NonNull B buf) { ++ return this.delegate.decode(buf); ++ } ++ ++ @Override ++ public void encode(final @NonNull B buf, final @NonNull A value) { ++ if (!DATA_SANITIZER.get().value().get()) { ++ this.delegate.encode(buf, value); ++ } else { ++ this.delegate.encode(buf, this.sanitizer.apply(value)); ++ } ++ } ++ } ++ ++ public record DataSanitizer(AtomicBoolean value) implements AutoCloseable { ++ ++ public DataSanitizer() { ++ this(new AtomicBoolean(false)); ++ } ++ ++ public void start() { ++ this.value.compareAndSet(false, true); ++ } ++ ++ @Override ++ public void close() { ++ this.value.compareAndSet(true, false); ++ } ++ } ++ ++ private DataSanitizationUtil() { ++ } ++ ++} +diff --git a/src/main/java/net/minecraft/core/component/DataComponents.java b/src/main/java/net/minecraft/core/component/DataComponents.java +index c9aef759c1485da753e820f9b509117ca50a31e4..60757f8df706cba92350d73503b73913cff3bcfc 100644 +--- a/src/main/java/net/minecraft/core/component/DataComponents.java ++++ b/src/main/java/net/minecraft/core/component/DataComponents.java +@@ -138,10 +138,10 @@ public class DataComponents { + "map_post_processing", builder -> builder.networkSynchronized(MapPostProcessing.STREAM_CODEC) + ); + public static final DataComponentType<ChargedProjectiles> CHARGED_PROJECTILES = register( +- "charged_projectiles", builder -> builder.persistent(ChargedProjectiles.CODEC).networkSynchronized(ChargedProjectiles.STREAM_CODEC).cacheEncoding() ++ "charged_projectiles", builder -> builder.persistent(ChargedProjectiles.CODEC).networkSynchronized(io.papermc.paper.util.DataSanitizationUtil.CHARGED_PROJECTILES).cacheEncoding() // Paper - sanitize charged projectiles + ); + public static final DataComponentType<BundleContents> BUNDLE_CONTENTS = register( +- "bundle_contents", builder -> builder.persistent(BundleContents.CODEC).networkSynchronized(BundleContents.STREAM_CODEC).cacheEncoding() ++ "bundle_contents", builder -> builder.persistent(BundleContents.CODEC).networkSynchronized(io.papermc.paper.util.DataSanitizationUtil.BUNDLE_CONTENTS).cacheEncoding() // Paper - sanitize bundle contents + ); + public static final DataComponentType<PotionContents> POTION_CONTENTS = register( + "potion_contents", builder -> builder.persistent(PotionContents.CODEC).networkSynchronized(PotionContents.STREAM_CODEC).cacheEncoding() +@@ -208,7 +208,7 @@ public class DataComponents { + "pot_decorations", builder -> builder.persistent(PotDecorations.CODEC).networkSynchronized(PotDecorations.STREAM_CODEC).cacheEncoding() + ); + public static final DataComponentType<ItemContainerContents> CONTAINER = register( +- "container", builder -> builder.persistent(ItemContainerContents.CODEC).networkSynchronized(ItemContainerContents.STREAM_CODEC).cacheEncoding() ++ "container", builder -> builder.persistent(ItemContainerContents.CODEC).networkSynchronized(io.papermc.paper.util.DataSanitizationUtil.CONTAINER).cacheEncoding() // Paper - sanitize container contents + ); + public static final DataComponentType<BlockItemStateProperties> BLOCK_STATE = register( + "block_state", builder -> builder.persistent(BlockItemStateProperties.CODEC).networkSynchronized(BlockItemStateProperties.STREAM_CODEC).cacheEncoding() +diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEntityDataPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEntityDataPacket.java +index 59c1c103545f04fd35e6932df64a9910a1d74cd7..56bde49e6b7790155b032d0be40961d566ab89e9 100644 +--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEntityDataPacket.java ++++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEntityDataPacket.java +@@ -19,9 +19,11 @@ public record ClientboundSetEntityDataPacket(int id, List<SynchedEntityData.Data + } + + private static void pack(List<SynchedEntityData.DataValue<?>> trackedValues, RegistryFriendlyByteBuf buf) { ++ try (var ignored = io.papermc.paper.util.DataSanitizationUtil.start(true)) { // Paper - data sanitization + for (SynchedEntityData.DataValue<?> dataValue : trackedValues) { + dataValue.write(buf); + } ++ } // Paper - data sanitization + + buf.writeByte(255); + } +diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEquipmentPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEquipmentPacket.java +index e092a486c4041ab1cfe9e29c88d0d94528a6e9a6..3945ca04ede578121b370592482ac917f2d4cf96 100644 +--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEquipmentPacket.java ++++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetEquipmentPacket.java +@@ -19,6 +19,13 @@ public class ClientboundSetEquipmentPacket implements Packet<ClientGamePacketLis + private final List<Pair<EquipmentSlot, ItemStack>> slots; + + public ClientboundSetEquipmentPacket(int id, List<Pair<EquipmentSlot, ItemStack>> equipmentList) { ++ // Paper start - data sanitization ++ this(id, equipmentList, false); ++ } ++ private boolean sanitize = false; ++ public ClientboundSetEquipmentPacket(int id, List<Pair<EquipmentSlot, ItemStack>> equipmentList, boolean sanitize) { ++ this.sanitize = sanitize; ++ // Paper end - data sanitization + this.entity = id; + this.slots = equipmentList; + } +@@ -41,6 +48,7 @@ public class ClientboundSetEquipmentPacket implements Packet<ClientGamePacketLis + buf.writeVarInt(this.entity); + int i = this.slots.size(); + ++ try (var ignored = io.papermc.paper.util.DataSanitizationUtil.start(this.sanitize)) { // Paper - data sanitization + for (int j = 0; j < i; j++) { + Pair<EquipmentSlot, ItemStack> pair = this.slots.get(j); + EquipmentSlot equipmentSlot = pair.getFirst(); +@@ -49,6 +57,7 @@ public class ClientboundSetEquipmentPacket implements Packet<ClientGamePacketLis + buf.writeByte(bl ? k | -128 : k); + ItemStack.OPTIONAL_STREAM_CODEC.encode(buf, pair.getSecond()); + } ++ } // Paper - data sanitization + } + + @Override +diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java +index 0e7ace92522fbd4cef7b2c2b8a0f8b86c2cce192..1d849ce4e2c85f149af25318b8ffb6dcef6c6788 100644 +--- a/src/main/java/net/minecraft/server/level/ServerEntity.java ++++ b/src/main/java/net/minecraft/server/level/ServerEntity.java +@@ -349,7 +349,7 @@ public class ServerEntity { + } + + if (!list.isEmpty()) { +- sender.accept(new ClientboundSetEquipmentPacket(this.entity.getId(), list)); ++ sender.accept(new ClientboundSetEquipmentPacket(this.entity.getId(), list, true)); // Paper - data sanitization + } + ((LivingEntity) this.entity).detectEquipmentUpdatesPublic(); // CraftBukkit - SPIGOT-3789: sync again immediately after sending + } +diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java +index 60c65af218d533d53b765ba2175fed163c32c126..a0f5839719ca0ce6ed048229f074041b4f64cc97 100644 +--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java ++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java +@@ -2732,7 +2732,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl + entity.refreshEntityData(ServerGamePacketListenerImpl.this.player); + // SPIGOT-7136 - Allays + if (entity instanceof Allay) { +- ServerGamePacketListenerImpl.this.send(new ClientboundSetEquipmentPacket(entity.getId(), Arrays.stream(net.minecraft.world.entity.EquipmentSlot.values()).map((slot) -> Pair.of(slot, ((LivingEntity) entity).getItemBySlot(slot).copy())).collect(Collectors.toList()))); ++ ServerGamePacketListenerImpl.this.send(new ClientboundSetEquipmentPacket(entity.getId(), Arrays.stream(net.minecraft.world.entity.EquipmentSlot.values()).map((slot) -> Pair.of(slot, ((LivingEntity) entity).getItemBySlot(slot).copy())).collect(Collectors.toList()), true)); // Paper - sanitize + ServerGamePacketListenerImpl.this.player.containerMenu.sendAllDataToRemote(); + } + } +diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java +index 7b019553d88a4294fad1107c5f28ba3fff985d63..b5994949028bc5cd30d893a1a6b296991d8d1570 100644 +--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java ++++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java +@@ -3353,7 +3353,7 @@ public abstract class LivingEntity extends Entity implements Attackable { + } + + }); +- ((ServerLevel) this.level()).getChunkSource().broadcast(this, new ClientboundSetEquipmentPacket(this.getId(), list)); ++ ((ServerLevel) this.level()).getChunkSource().broadcast(this, new ClientboundSetEquipmentPacket(this.getId(), list, true)); // Paper - data sanitization + } + + private ItemStack getLastArmorItem(EquipmentSlot slot) { |