Mirror von
https://github.com/PaperMC/Paper.git
synchronisiert 2024-11-15 12:30:06 +01:00
89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
115 Zeilen
8.8 KiB
Diff
115 Zeilen
8.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Mon, 12 Dec 2022 12:14:03 -0800
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Subject: [PATCH] Properly track the changed item from dispense events
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diff --git a/src/main/java/net/minecraft/core/dispenser/AbstractProjectileDispenseBehavior.java b/src/main/java/net/minecraft/core/dispenser/AbstractProjectileDispenseBehavior.java
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index 155bd3d6d9c7d3cac7fd04de8210301251d1e17a..bc2e763a848b4bf7e9598ffe1ca2aa35a9af4677 100644
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--- a/src/main/java/net/minecraft/core/dispenser/AbstractProjectileDispenseBehavior.java
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+++ b/src/main/java/net/minecraft/core/dispenser/AbstractProjectileDispenseBehavior.java
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@@ -23,7 +23,7 @@ public abstract class AbstractProjectileDispenseBehavior extends DefaultDispense
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ServerLevel worldserver = pointer.level();
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Position iposition = DispenserBlock.getDispensePosition(pointer);
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Direction enumdirection = (Direction) pointer.state().getValue(DispenserBlock.FACING);
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- Projectile iprojectile = this.getProjectile(worldserver, iposition, stack);
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+ // Paper - move down
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// CraftBukkit start
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// iprojectile.shoot((double) enumdirection.getStepX(), (double) ((float) enumdirection.getStepY() + 0.1F), (double) enumdirection.getStepZ(), this.getPower(), this.getUncertainty());
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@@ -52,6 +52,7 @@ public abstract class AbstractProjectileDispenseBehavior extends DefaultDispense
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return stack;
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}
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}
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+ Projectile iprojectile = this.getProjectile(worldserver, iposition, CraftItemStack.asNMSCopy(event.getItem())); // Paper - move from above and track changed items in the dispense event
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iprojectile.shoot(event.getVelocity().getX(), event.getVelocity().getY(), event.getVelocity().getZ(), this.getPower(), this.getUncertainty());
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((Entity) iprojectile).projectileSource = new org.bukkit.craftbukkit.projectiles.CraftBlockProjectileSource(pointer.blockEntity());
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diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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index 58eccc76fe4c24c364e6c634fcca60ab771a5792..e2e1273d787536d2fe1bdbbf8af36eb5ac220599 100644
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--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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@@ -241,10 +241,14 @@ public interface DispenseItemBehavior {
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idispensebehavior.dispense(pointer, eventStack);
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return stack;
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}
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+ // Paper start - track changed items in the dispense event
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+ itemstack1 = CraftItemStack.unwrap(event.getItem()); // unwrap is safe because the stack won't be modified
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+ entitytypes = ((SpawnEggItem) itemstack1.getItem()).getType(itemstack1.getTag());
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+ // Paper end - track changed item from dispense event
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}
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try {
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- entitytypes.spawn(pointer.level(), stack, (Player) null, pointer.pos().relative(enumdirection), MobSpawnType.DISPENSER, enumdirection != Direction.UP, false);
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+ entitytypes.spawn(pointer.level(), itemstack1, (Player) null, pointer.pos().relative(enumdirection), MobSpawnType.DISPENSER, enumdirection != Direction.UP, false); // Paper - track changed item in dispense event
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} catch (Exception exception) {
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DispenseItemBehavior.LOGGER.error("Error while dispensing spawn egg from dispenser at {}", pointer.pos(), exception); // CraftBukkit - decompile error
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return ItemStack.EMPTY;
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@@ -299,10 +303,11 @@ public interface DispenseItemBehavior {
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}
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// CraftBukkit end
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+ final ItemStack newStack = CraftItemStack.unwrap(event.getItem()); // Paper - use event itemstack (unwrap is fine here because the stack won't be modified)
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Consumer<ArmorStand> consumer = EntityType.appendDefaultStackConfig((entityarmorstand) -> {
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entityarmorstand.setYRot(enumdirection.toYRot());
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- }, worldserver, stack, (Player) null);
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- ArmorStand entityarmorstand = (ArmorStand) EntityType.ARMOR_STAND.spawn(worldserver, stack.getTag(), consumer, blockposition, MobSpawnType.DISPENSER, false, false);
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+ }, worldserver, newStack, (Player) null); // Paper - track changed items in the dispense event
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+ ArmorStand entityarmorstand = (ArmorStand) EntityType.ARMOR_STAND.spawn(worldserver, newStack.getTag(), consumer, blockposition, MobSpawnType.DISPENSER, false, false); // Paper - track changed items in the dispense event
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if (entityarmorstand != null) {
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if (shrink) stack.shrink(1); // Paper - actually handle here
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@@ -582,7 +587,7 @@ public interface DispenseItemBehavior {
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}
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SmallFireball entitysmallfireball = new SmallFireball(worldserver, d0, d1, d2, event.getVelocity().getX(), event.getVelocity().getY(), event.getVelocity().getZ());
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- entitysmallfireball.setItem(itemstack1);
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+ entitysmallfireball.setItem(CraftItemStack.unwrap(event.getItem())); // Paper - track changed items in the dispense event (unwrap is save cause setItem already copies)
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entitysmallfireball.projectileSource = new org.bukkit.craftbukkit.projectiles.CraftBlockProjectileSource(pointer.blockEntity());
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worldserver.addFreshEntity(entitysmallfireball);
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@@ -628,6 +633,7 @@ public interface DispenseItemBehavior {
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int y = blockposition.getY();
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int z = blockposition.getZ();
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BlockState iblockdata = worldserver.getBlockState(blockposition);
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+ ItemStack dispensedItem = stack; // Paper - track changed item from the dispense event
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// Paper start - correctly check if the bucket place will succeed
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/* Taken from SolidBucketItem#emptyContents */
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boolean willEmptyContentsSolidBucketItem = dispensiblecontaineritem instanceof net.minecraft.world.item.SolidBucketItem && worldserver.isInWorldBounds(blockposition) && iblockdata.isAir();
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@@ -657,12 +663,15 @@ public interface DispenseItemBehavior {
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}
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}
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- dispensiblecontaineritem = (DispensibleContainerItem) CraftItemStack.asNMSCopy(event.getItem()).getItem();
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+ // Paper start - track changed item from dispense event
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+ dispensedItem = CraftItemStack.unwrap(event.getItem()); // unwrap is safe here as the stack isn't mutated
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+ dispensiblecontaineritem = (DispensibleContainerItem) dispensedItem.getItem();
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+ // Paper end - track changed item from dispense event
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}
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// CraftBukkit end
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if (dispensiblecontaineritem.emptyContents((Player) null, worldserver, blockposition, (BlockHitResult) null)) {
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- dispensiblecontaineritem.checkExtraContent((Player) null, worldserver, stack, blockposition);
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+ dispensiblecontaineritem.checkExtraContent((Player) null, worldserver, dispensedItem, blockposition); // Paper - track changed item from dispense event
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// CraftBukkit start - Handle stacked buckets
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Item item = Items.BUCKET;
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stack.shrink(1);
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diff --git a/src/main/java/net/minecraft/core/dispenser/ShulkerBoxDispenseBehavior.java b/src/main/java/net/minecraft/core/dispenser/ShulkerBoxDispenseBehavior.java
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index 6f2adf2334e35e8a617a4ced0c1af2abf32bbd8d..cb308808906a8cdb127df8284e106e00553473ca 100644
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--- a/src/main/java/net/minecraft/core/dispenser/ShulkerBoxDispenseBehavior.java
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+++ b/src/main/java/net/minecraft/core/dispenser/ShulkerBoxDispenseBehavior.java
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@@ -57,7 +57,12 @@ public class ShulkerBoxDispenseBehavior extends OptionalDispenseItemBehavior {
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// CraftBukkit end
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try {
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- this.setSuccess(((BlockItem) item).place(new DirectionalPlaceContext(pointer.level(), blockposition, enumdirection, stack, enumdirection1)).consumesAction());
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+ // Paper start - track changed items in the dispense event
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+ this.setSuccess(((BlockItem) item).place(new DirectionalPlaceContext(pointer.level(), blockposition, enumdirection, CraftItemStack.asNMSCopy(event.getItem()), enumdirection1)).consumesAction());
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+ if (this.isSuccess()) {
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+ stack.shrink(1); // vanilla shrink is in the place function above, manually handle it here
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+ }
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+ // Paper end - track changed items in the dispense event
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} catch (Exception exception) {
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ShulkerBoxDispenseBehavior.LOGGER.error("Error trying to place shulker box at {}", blockposition, exception);
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}
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