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SPIGOT-4325: Validate coordinate arguments in Chunk/ChunkSnapshot

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This commit is contained in:
md_5 2018-08-29 07:44:36 +10:00
parent a1ab86d8cb
commit 3831ae621f
2 changed files with 26 additions and 0 deletions
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9
src/main/java/org/bukkit/craftbukkit/CraftChunk.java
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@ -1,5 +1,6 @@
package org.bukkit.craftbukkit;
import com.google.common.base.Preconditions;
import java.lang.ref.WeakReference;
import java.util.Arrays;
@ -69,6 +70,8 @@ public class CraftChunk implements Chunk {
}
public Block getBlock(int x, int y, int z) {
validateChunkCoordinates(x, y, z);
return new CraftBlock(worldServer, new BlockPosition((this.x << 4) | x, y, (this.z << 4) | z));
}
@ -275,6 +278,12 @@ public class CraftChunk implements Chunk {
return temps;
}
static void validateChunkCoordinates(int x, int y, int z) {
Preconditions.checkArgument(0 <= x && x <= 15, "x out of range (expected 0-15, got %s)", x);
Preconditions.checkArgument(0 <= y && y <= 255, "y out of range (expected 0-255, got %s)", y);
Preconditions.checkArgument(0 <= z && z <= 15, "z out of range (expected 0-15, got %s)", z);
}
static {
Arrays.fill(emptySkyLight, (byte) 0xFF);
}

17
src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
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@ -1,5 +1,6 @@
package org.bukkit.craftbukkit;
import com.google.common.base.Preconditions;
import org.bukkit.ChunkSnapshot;
import org.bukkit.Material;
import org.bukkit.block.Biome;
@ -57,38 +58,54 @@ public class CraftChunkSnapshot implements ChunkSnapshot {
@Override
public Material getBlockType(int x, int y, int z) {
CraftChunk.validateChunkCoordinates(x, y, z);
return CraftMagicNumbers.getMaterial(blockids[y >> 4].a(x, y & 0xF, z).getBlock());
}
@Override
public final BlockData getBlockData(int x, int y, int z) {
CraftChunk.validateChunkCoordinates(x, y, z);
return CraftBlockData.fromData(blockids[y >> 4].a(x, y & 0xF, z));
}
@Override
public final int getData(int x, int y, int z) {
CraftChunk.validateChunkCoordinates(x, y, z);
return CraftMagicNumbers.toLegacyData(blockids[y >> 4].a(x, y & 0xF, z));
}
public final int getBlockSkyLight(int x, int y, int z) {
CraftChunk.validateChunkCoordinates(x, y, z);
int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
return (skylight[y >> 4][off] >> ((x & 1) << 2)) & 0xF;
}
public final int getBlockEmittedLight(int x, int y, int z) {
CraftChunk.validateChunkCoordinates(x, y, z);
int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
return (emitlight[y >> 4][off] >> ((x & 1) << 2)) & 0xF;
}
public final int getHighestBlockYAt(int x, int z) {
CraftChunk.validateChunkCoordinates(x, 0, z);
return hmap.a(x, z);
}
public final Biome getBiome(int x, int z) {
CraftChunk.validateChunkCoordinates(x, 0, z);
return CraftBlock.biomeBaseToBiome(biome[z << 4 | x]);
}
public final double getRawBiomeTemperature(int x, int z) {
CraftChunk.validateChunkCoordinates(x, 0, z);
return biomeTemp[z << 4 | x];
}