Clear chunk on dimension switch

This should resolve chunks being leftover in instances such as server switches in proxies.

connector/src/main/java/org/geysermc/connector/network/session/cache/ChunkCache.java

@@ -67,7 +67,7 @@ public class ChunkCache {
         chunks.put(chunkPosition, geyserColumn);
     }
 
-    public GeyserColumn getChunk(int chunkX, int chunkZ)  {
+    public GeyserColumn getChunk(int chunkX, int chunkZ) {
         long chunkPosition = MathUtils.chunkPositionToLong(chunkX, chunkZ);
         return chunks.getOrDefault(chunkPosition, null);
     }
@@ -136,6 +136,19 @@ public class ChunkCache {
         chunks.remove(chunkPosition);
     }
 
+    /**
+     * Manually clears all entries in the chunk cache.
+     * The server is responsible for clearing chunk entries if out of render distance (for example) or switching dimensions,
+     * but it is the client that must clear chunks in the event of proxy switches.
+     */
+    public void clear() {
+        if (!cache) {
+            return;
+        }
+
+        chunks.clear();
+    }
+
     public int getChunkMinY() {
         return minY >> 4;
     }

connector/src/main/java/org/geysermc/connector/utils/DimensionUtils.java

@@ -60,6 +60,7 @@ public class DimensionUtils {
         int bedrockDimension = javaToBedrock(javaDimension);
         Entity player = session.getPlayerEntity();
 
+        session.getChunkCache().clear();
         session.getEntityCache().removeAllEntities();
         session.getItemFrameCache().clear();
         session.getLecternCache().clear();

connector/src/main/java/org/geysermc/connector/utils/LoginEncryptionUtils.java

@@ -57,6 +57,7 @@ import java.security.KeyPairGenerator;
 import java.security.PublicKey;
 import java.security.interfaces.ECPublicKey;
 import java.security.spec.ECGenParameterSpec;
+import java.util.Iterator;
 import java.util.UUID;
 
 public class LoginEncryptionUtils {
@@ -70,8 +71,10 @@ public class LoginEncryptionUtils {
         }
 
         ECPublicKey lastKey = null;
-        boolean validChain = false;
-        for (JsonNode node : data) {
+        boolean mojangSigned = false;
+        Iterator<JsonNode> iterator = data.iterator();
+        while (iterator.hasNext()) {
+            JsonNode node = iterator.next();
             JWSObject jwt = JWSObject.parse(node.asText());
 
             // x509 cert is expected in every claim
@@ -92,8 +95,12 @@ public class LoginEncryptionUtils {
                 return false;
             }
 
+            if (mojangSigned) {
+                return !iterator.hasNext();
+            }
+
             if (lastKey.equals(EncryptionUtils.getMojangPublicKey())) {
-                validChain = true;
+                mojangSigned = true;
             }
 
             Object payload = JSONValue.parse(jwt.getPayload().toString());
@@ -104,7 +111,7 @@ public class LoginEncryptionUtils {
             lastKey = EncryptionUtils.generateKey((String) identityPublicKey);
         }
 
-        return validChain;
+        return mojangSigned;
     }
 
     public static void encryptPlayerConnection(GeyserSession session, LoginPacket loginPacket) {