src/java.base/share/classes/sun/security/ssl/HandshakeMessage.java

8180643 Illegal handshake message

*** 77,86 ****
--- 77,89 ----
  
      /* Class and subclass dynamic debugging support */
      public static final Debug debug = Debug.getInstance("ssl");
  
      // enum HandshakeType:
+     //
+     // Please update the isUnsupported() method accordingly if the handshake
+     // types get updated in the future.
      static final byte   ht_hello_request          = 0;      // RFC 5246
      static final byte   ht_client_hello           = 1;      // RFC 5246
      static final byte   ht_server_hello           = 2;      // RFC 5246
      static final byte   ht_hello_verify_request   = 3;      // RFC 6347
      static final byte   ht_new_session_ticket     = 4;      // RFC 4507
*** 128,137 ****
--- 131,158 ----
              b = newarray;
          }
          return b;
      }
  
+     static boolean isUnsupported(byte handshakeType) {
+         return (handshakeType != ht_hello_request) &&
+                (handshakeType != ht_client_hello) &&
+                (handshakeType != ht_server_hello) &&
+                (handshakeType != ht_hello_verify_request) &&
+                (handshakeType != ht_new_session_ticket) &&
+                (handshakeType != ht_certificate) &&
+                (handshakeType != ht_server_key_exchange) &&
+                (handshakeType != ht_certificate_request) &&
+                (handshakeType != ht_server_hello_done) &&
+                (handshakeType != ht_certificate_verify) &&
+                (handshakeType != ht_client_key_exchange) &&
+                (handshakeType != ht_finished) &&
+                (handshakeType != ht_certificate_url) &&
+                (handshakeType != ht_certificate_status) &&
+                (handshakeType != ht_supplemental_data);
+     }
+ 
      private static byte[] genPad(int b, int count) {
          byte[] padding = new byte[count];
          Arrays.fill(padding, (byte)b);
          return padding;
      }