Make a difference between a decrypt error and an exception

bungee/src/main/java/org/geysermc/floodgate/addon/data/BungeeProxyDataHandler.java

@@ -128,6 +128,10 @@ public class BungeeProxyDataHandler extends ChannelInboundHandlerAdapter {
 
             switch (result.getResultType()) {
                 case EXCEPTION:
+                    ctx.channel().attr(kickMessageAttribute)
+                            .set(Constants.INTERNAL_ERROR_MESSAGE);
+                    break;
+                case DECRYPT_ERROR:
                     ctx.channel().attr(kickMessageAttribute)
                             .set(config.getDisconnect().getInvalidKey());
                     break;

common/src/main/java/org/geysermc/floodgate/player/FloodgateHandshakeHandler.java

@@ -180,7 +180,7 @@ public final class FloodgateHandshakeHandler {
                 formatException.printStackTrace();
 
                 throw callHandlerAndReturnResult(
-                        ResultType.EXCEPTION,
+                        ResultType.DECRYPT_ERROR,
                         channel, null, hostname
                 );
             } catch (Exception exception) {
@@ -203,6 +203,8 @@ public final class FloodgateHandshakeHandler {
                 return (HandshakeResult) error;
             }
 
+            error.printStackTrace();
+
             return callHandlerAndReturnResult(
                     ResultType.EXCEPTION,
                     channel, null, hostname
@@ -298,6 +300,7 @@ public final class FloodgateHandshakeHandler {
     public enum ResultType {
         EXCEPTION,
         NOT_FLOODGATE_DATA,
+        DECRYPT_ERROR,
         INVALID_DATA_LENGTH,
         TIMESTAMP_DENIED,
         SUCCESS

common/src/main/java/org/geysermc/floodgate/util/Constants.java

@@ -52,6 +52,9 @@ public final class Constants {
     public static final String TIMESTAMP_DENIED_MESSAGE =
             "Something isn't right with this data." +
             " Try logging in again or contact a server administrator if the issue persists.";
+    public static final String INTERNAL_ERROR_MESSAGE =
+            "An internal error happened while handling Floodgate data." + 
+            " Try logging in again or contact a server administrator if the issue persists.";
 
 
     public static final int HANDSHAKE_PACKET_ID = 0;

spigot/src/main/java/org/geysermc/floodgate/addon/data/SpigotDataHandler.java

@@ -94,6 +94,10 @@ public final class SpigotDataHandler extends ChannelInboundHandlerAdapter {
                     case SUCCESS:
                         break;
                     case EXCEPTION:
+                        logger.info(Constants.INTERNAL_ERROR_MESSAGE);
+                        ctx.close();
+                        return true;
+                    case DECRYPT_ERROR:
                         logger.info(config.getDisconnect().getInvalidKey());
                         ctx.close();
                         return true;

velocity/src/main/java/org/geysermc/floodgate/addon/data/VelocityProxyDataHandler.java

@@ -128,6 +128,10 @@ public final class VelocityProxyDataHandler extends ChannelInboundHandlerAdapter
                 case SUCCESS:
                     break;
                 case EXCEPTION:
+                    ctx.channel().attr(kickMessageAttribute)
+                            .set(Constants.INTERNAL_ERROR_MESSAGE);
+                    return;
+                case DECRYPT_ERROR:
                     ctx.channel().attr(kickMessageAttribute)
                             .set(config.getDisconnect().getInvalidKey());
                     return;