lib/lockbox/aes_gcm.rb in lockbox-0.4.9 vs lib/lockbox/aes_gcm.rb in lockbox-0.5.0

@@ -41,14 +41,13 @@
       # If no associated data shall be used, this method must still be called with a value of ""
       # When decrypting, set it only after calling #decrypt, #key=, #iv= and #auth_tag= first.
       cipher.auth_data = associated_data || ""
 
       begin
-        if ciphertext.to_s.empty?
-          cipher.final
-        else
-          cipher.update(ciphertext) + cipher.final
-        end
+        message = String.new
+        message << cipher.update(ciphertext) unless ciphertext.to_s.empty?
+        message << cipher.final
+        message
       rescue OpenSSL::Cipher::CipherError
         fail_decryption
       end
     end