OBFHELPERS (#4733)

Spigot-Server-Patches/0209-Fix-exploit-that-allowed-colored-signs-to-be-created.patch

@@ -5,16 +5,27 @@ Subject: [PATCH] Fix exploit that allowed colored signs to be created
 
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index b92449c7035ebb330eb3aaa48e91a6d0b3873c5c..e72a519645e9383c989fc3ad8059c1c88c1b6382 100644
+index 453128ea031cea72d3fd57fb64938bd20aa1e7f3..32076076b39b6c408b0ee95afb7ef11b71e373dc 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
-@@ -2631,7 +2631,8 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2631,7 +2631,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
              String[] lines = new String[4];
  
              for (int i = 0; i < list.size(); ++i) {
 -                lines[i] = EnumChatFormat.a(new ChatComponentText(EnumChatFormat.a((String) list.get(i))).getString());
-+                // Paper TODO(Proximyst): Add obfhelper when 1.16.4 runs
++                lines[i] = SharedConstants.filterAllowedChatCharacters(list.get(i)); // Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
-+                lines[i] = SharedConstants.a(list.get(i)); // Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
              }
              SignChangeEvent event = new SignChangeEvent((org.bukkit.craftbukkit.block.CraftBlock) player.getWorld().getBlockAt(x, y, z), this.server.getPlayer(this.player), lines);
              this.server.getPluginManager().callEvent(event);
+diff --git a/src/main/java/net/minecraft/server/SharedConstants.java b/src/main/java/net/minecraft/server/SharedConstants.java
+index 9663e8c10662c9660964afda62d8a65812fae69d..470690dbe19db1622eca44f6801ece37d7ad7426 100644
+--- a/src/main/java/net/minecraft/server/SharedConstants.java
++++ b/src/main/java/net/minecraft/server/SharedConstants.java
+@@ -19,6 +19,7 @@ public class SharedConstants {
+         return c0 != 167 && c0 >= ' ' && c0 != 127;
+     }
+ 
++    public static String filterAllowedChatCharacters(String input) { return a(input); } // Paper - OBFHELPER
+     public static String a(String s) {
+         StringBuilder stringbuilder = new StringBuilder();
+         char[] achar = s.toCharArray();

Spigot-Server-Patches/0327-Limit-Client-Sign-length-more.patch

@@ -22,7 +22,7 @@ it only impacts data sent from the client.
 Set -DPaper.maxSignLength=XX to change limit or -1 to disable
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index b1faac1e2465cdae624ca5d8d999db3cdedfe3de..fccde94e0ccd0964a051383bd1fc38d7b5967cd4 100644
+index aca3aae216308544e527a6325b9a02a9a05c2551..040ed989dcfc59c8cb58d81070ea9c6cd493e47d 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -110,6 +110,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
@@ -33,10 +33,11 @@ index b1faac1e2465cdae624ca5d8d999db3cdedfe3de..fccde94e0ccd0964a051383bd1fc38d7
      private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
  
      public PlayerConnection(MinecraftServer minecraftserver, NetworkManager networkmanager, EntityPlayer entityplayer) {
-@@ -2696,8 +2697,18 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2696,7 +2697,17 @@ public class PlayerConnection implements PacketListenerPlayIn {
              String[] lines = new String[4];
  
              for (int i = 0; i < list.size(); ++i) {
+-                lines[i] = SharedConstants.filterAllowedChatCharacters(list.get(i)); // Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
 +                // Paper start - cap line length - modified clients can send longer data than normal
 +                String currentLine = list.get(i);
 +                if (MAX_SIGN_LINE_LENGTH > 0 && currentLine.length() > MAX_SIGN_LINE_LENGTH) {
@@ -47,9 +48,7 @@ index b1faac1e2465cdae624ca5d8d999db3cdedfe3de..fccde94e0ccd0964a051383bd1fc38d7
 +                    }
 +                }
 +                // Paper end
-                 // Paper TODO(Proximyst): Add obfhelper when 1.16.4 runs
++                lines[i] = SharedConstants.filterAllowedChatCharacters(currentLine); // Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
--                lines[i] = SharedConstants.a(list.get(i)); // Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
-+                lines[i] = SharedConstants.a(currentLine); // Paper - Replaced with anvil color stripping method to stop exploits that allow colored signs to be created.
              }
              SignChangeEvent event = new SignChangeEvent((org.bukkit.craftbukkit.block.CraftBlock) player.getWorld().getBlockAt(x, y, z), this.server.getPlayer(this.player), lines);
              this.server.getPluginManager().callEvent(event);

Spigot-Server-Patches/0511-Fix-Per-World-Difficulty-Remembering-Difficulty.patch

@@ -63,10 +63,10 @@ index 1175f23558fe694bfb77dd478b0a3ec15109dd9b..1439b874b9a825ea605c15aaacaecaed
      }
  
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index bf052016d7ca4d2012bafe86909f4d581498d403..0c1b4932f14e58bc6d418cf20f23e7915525430b 100644
+index d224bdc5bf05e3688467dab1dd22f722445ebc6a..3c989cdbbdf95f4629445a6b4d22a8ad8dcc958a 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
-@@ -2873,7 +2873,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2872,7 +2872,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
      public void a(PacketPlayInDifficultyChange packetplayindifficultychange) {
          PlayerConnectionUtils.ensureMainThread(packetplayindifficultychange, this, this.player.getWorldServer());
          if (this.player.k(2) || this.isExemptPlayer()) {

Spigot-Server-Patches/0549-Brand-support.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Brand support
 
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index 3dc5b0279f4c50138e7f85b8aff182b6ed2e2c61..f6c04946aa752b9db4e0c81dbb74334618c955ad 100644
+index 789a41b900640add7adbc216c65a4133e54e88b0..72a3f0219c5c29229d75357db37d569615e8e43d 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -5,6 +5,7 @@ import com.google.common.primitives.Doubles;
@@ -25,7 +25,7 @@ index 3dc5b0279f4c50138e7f85b8aff182b6ed2e2c61..f6c04946aa752b9db4e0c81dbb743346
      public PlayerConnection(MinecraftServer minecraftserver, NetworkManager networkmanager, EntityPlayer entityplayer) {
          this.minecraftServer = minecraftserver;
          this.networkManager = networkmanager;
-@@ -2832,6 +2835,8 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2831,6 +2834,8 @@ public class PlayerConnection implements PacketListenerPlayIn {
      private static final MinecraftKey CUSTOM_REGISTER = new MinecraftKey("register");
      private static final MinecraftKey CUSTOM_UNREGISTER = new MinecraftKey("unregister");
  
@@ -34,7 +34,7 @@ index 3dc5b0279f4c50138e7f85b8aff182b6ed2e2c61..f6c04946aa752b9db4e0c81dbb743346
      @Override
      public void a(PacketPlayInCustomPayload packetplayincustompayload) {
          PlayerConnectionUtils.ensureMainThread(packetplayincustompayload, this, this.player.getWorldServer());
-@@ -2859,6 +2864,16 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2858,6 +2863,16 @@ public class PlayerConnection implements PacketListenerPlayIn {
              try {
                  byte[] data = new byte[packetplayincustompayload.data.readableBytes()];
                  packetplayincustompayload.data.readBytes(data);
@@ -51,7 +51,7 @@ index 3dc5b0279f4c50138e7f85b8aff182b6ed2e2c61..f6c04946aa752b9db4e0c81dbb743346
                  server.getMessenger().dispatchIncomingMessage(player.getBukkitEntity(), packetplayincustompayload.tag.toString(), data);
              } catch (Exception ex) {
                  PlayerConnection.LOGGER.error("Couldn\'t dispatch custom payload", ex);
-@@ -2868,6 +2883,12 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2867,6 +2882,12 @@ public class PlayerConnection implements PacketListenerPlayIn {
  
      }