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Add depth limit to Component deserializer (1.19.4) (#84)

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* Add depth limit to Component deserializer

* Make depth limit configurable; increase placeholder penalty
This commit is contained in:
Luna
2023-05-31 20:18:11 -03:00
committed by GitHub
parent ae17467c1b
commit cbfc1beb6a
11 changed files with 166 additions and 105 deletions
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163
patches/server/0047-Add-depth-limit-to-Component-deserializer.patch Normal file
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@ -0,0 +1,163 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Luna <lunahatesgogle@gmail.com>
Date: Wed, 31 May 2023 18:14:00 -0300
Subject: [PATCH] Add depth limit to Component deserializer
diff --git a/src/main/java/me/totalfreedom/scissors/ScissorsConfig.java b/src/main/java/me/totalfreedom/scissors/ScissorsConfig.java
index 39b56ca496ed7369ead21805d476c2b813fcdd1d..9659cff6412584190ff0c32e01f602de4ff7d3b3 100644
--- a/src/main/java/me/totalfreedom/scissors/ScissorsConfig.java
+++ b/src/main/java/me/totalfreedom/scissors/ScissorsConfig.java
@@ -87,8 +87,8 @@ public class ScissorsConfig
config.options().header(HEADER);
config.options().copyDefaults(true);
- version = getInt("config-version", 4);
- set("config-version", 4);
+ version = getInt("config-version", 5);
+ set("config-version", 5);
readConfig(ScissorsConfig.class, null);
}
@@ -175,6 +175,12 @@ public class ScissorsConfig
excludePlayersFromNbtComponents = getBoolean("excludePlayersFromNbtComponents", false);
}
+ public static int componentDepthLimit = 128;
+ private static void componentDepthLimit()
+ {
+ componentDepthLimit = getInt("componentDepthLimit", 128);
+ }
+
private static void set(String path, Object val)
{
config.set(path, val);
diff --git a/src/main/java/net/minecraft/network/chat/Component.java b/src/main/java/net/minecraft/network/chat/Component.java
index 9c2c22ee548ad77f0912698f33de5f467f32fb7f..ba2879b25e59290ab81501458414a417c121ed03 100644
--- a/src/main/java/net/minecraft/network/chat/Component.java
+++ b/src/main/java/net/minecraft/network/chat/Component.java
@@ -26,6 +26,7 @@ import java.util.List;
import java.util.Map.Entry;
import java.util.Optional;
import javax.annotation.Nullable;
+import me.totalfreedom.scissors.ScissorsConfig; // Scissors
import net.minecraft.ChatFormatting;
import net.minecraft.Util;
import net.minecraft.network.chat.contents.BlockDataSource;
@@ -44,6 +45,7 @@ import net.minecraft.util.GsonHelper;
import net.minecraft.util.LowerCaseEnumTypeAdapterFactory;
// CraftBukkit start
import com.google.common.collect.Streams;
+import java.util.regex.Pattern; // Scissors
import java.util.stream.Stream;
// CraftBukkit end
@@ -254,10 +256,16 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
throw new IllegalStateException("Couldn't get field 'lineStart' for JsonReader", nosuchfieldexception);
}
});
+ private static final Pattern PLACEHOLDER_PATTERN = Pattern.compile("%[0-9]+\\$s"); // Scissors
public Serializer() {}
- public MutableComponent deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+ // Scissors start
+ private MutableComponent deserialize(JsonElement jsonelement, JsonDeserializationContext jsondeserializationcontext, int depth) throws JsonParseException {
+ if (depth > ScissorsConfig.componentDepthLimit) {
+ throw new JsonParseException("Depth limit exceeded");
+ }
+
if (jsonelement.isJsonPrimitive()) {
return Component.literal(jsonelement.getAsString());
} else {
@@ -266,18 +274,16 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
if (!jsonelement.isJsonObject()) {
if (jsonelement.isJsonArray()) {
JsonArray jsonarray = jsonelement.getAsJsonArray();
- // Scissors start
if (jsonarray.size() <= 0) {
throw new JsonParseException("Unexpected empty array of components");
}
- // Scissors end
ichatmutablecomponent = null;
Iterator iterator = jsonarray.iterator();
while (iterator.hasNext()) {
JsonElement jsonelement1 = (JsonElement) iterator.next();
- MutableComponent ichatmutablecomponent1 = this.deserialize(jsonelement1, jsonelement1.getClass(), jsondeserializationcontext);
+ MutableComponent ichatmutablecomponent1 = this.deserialize(jsonelement1, jsondeserializationcontext, depth + 1);
if (ichatmutablecomponent == null) {
ichatmutablecomponent = ichatmutablecomponent1;
@@ -301,12 +307,17 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
s = GsonHelper.getAsString(jsonobject, "translate");
String s1 = GsonHelper.getAsString(jsonobject, "fallback", (String) null);
+ // Penalize depth for placeholders in translate & fallback
+ long translate_placeholders = PLACEHOLDER_PATTERN.matcher(s).results().count();
+ long fallback_placeholders = s1 != null ? PLACEHOLDER_PATTERN.matcher(s1).results().count() : 0;
+ int penalty = (int)Math.max(translate_placeholders, fallback_placeholders) * 12;
+
if (jsonobject.has("with")) {
JsonArray jsonarray1 = GsonHelper.getAsJsonArray(jsonobject, "with");
Object[] aobject = new Object[jsonarray1.size()];
for (int i = 0; i < aobject.length; ++i) {
- aobject[i] = Serializer.unwrapTextArgument(this.deserialize(jsonarray1.get(i), type, jsondeserializationcontext));
+ aobject[i] = Serializer.unwrapTextArgument(this.deserialize(jsonarray1.get(i), jsondeserializationcontext, depth + 1 + penalty));
}
ichatmutablecomponent = Component.translatableWithFallback(s, s1, aobject);
@@ -322,7 +333,7 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
ichatmutablecomponent = Component.score(GsonHelper.getAsString(jsonobject1, "name"), GsonHelper.getAsString(jsonobject1, "objective"));
} else if (jsonobject.has("selector")) {
- Optional<Component> optional = this.parseSeparator(type, jsondeserializationcontext, jsonobject);
+ Optional<Component> optional = this.parseSeparator(jsondeserializationcontext, jsonobject, depth + 1);
ichatmutablecomponent = Component.selector(GsonHelper.getAsString(jsonobject, "selector"), optional);
} else if (jsonobject.has("keybind")) {
@@ -333,7 +344,7 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
}
s = GsonHelper.getAsString(jsonobject, "nbt");
- Optional<Component> optional1 = this.parseSeparator(type, jsondeserializationcontext, jsonobject);
+ Optional<Component> optional1 = this.parseSeparator(jsondeserializationcontext, jsonobject, depth + 1);
boolean flag = GsonHelper.getAsBoolean(jsonobject, "interpret", false);
Object object;
@@ -360,7 +371,7 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
}
for (int j = 0; j < jsonarray2.size(); ++j) {
- ichatmutablecomponent.append((Component) this.deserialize(jsonarray2.get(j), type, jsondeserializationcontext));
+ ichatmutablecomponent.append((Component) this.deserialize(jsonarray2.get(j), jsondeserializationcontext, depth + 1));
}
}
@@ -370,6 +381,11 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
}
}
+ public MutableComponent deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+ return this.deserialize(jsonelement, jsondeserializationcontext, 1);
+ }
+ // Scissors end
+
private static Object unwrapTextArgument(Object text) {
if (text instanceof Component) {
Component ichatbasecomponent = (Component) text;
@@ -388,8 +404,10 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
return text;
}
- private Optional<Component> parseSeparator(Type type, JsonDeserializationContext context, JsonObject json) {
- return json.has("separator") ? Optional.of(this.deserialize(json.get("separator"), type, context)) : Optional.empty();
+ // Scissors start
+ private Optional<Component> parseSeparator(JsonDeserializationContext context, JsonObject json, int depth) {
+ return json.has("separator") ? Optional.of(this.deserialize(json.get("separator"), context, depth + 1)) : Optional.empty();
+ // Scissors end
}
private void serializeStyle(Style style, JsonObject json, JsonSerializationContext context) {