lib/ably/util/crypto.rb in ably-1.2.4 vs lib/ably/util/crypto.rb in ably-1.2.6

@@ -81,11 +81,11 @@
       cipher = openssl_cipher
       cipher.encrypt
       cipher.key = key
       iv = encrypt_options[:iv] || fixed_iv || cipher.random_iv
       cipher.iv = iv
-
-      iv << cipher.update(payload) << cipher.final
+      iv << cipher.update(payload) unless payload.empty?
+      iv << cipher.final
     end
 
     # Decrypt payload using configured Cipher
     #
     # @param [String] encrypted_payload_with_iv  the encrypted payload to be decrypted