anchor.diff:  
   %%% Use fake engine rsa implementation
   sign_verify_fake(Alg, Sha, KeySign, KeyVerify) ->
  +    ct:log("~p:~p  sign_verify_fake ~p~n Sha = ~p~n KeySign = ~p~n KeyVerify = ~p~n",
  +           [?MODULE, ?LINE, Alg, Sha, KeySign, KeyVerify]),
       case pubkey_alg_supported(Alg) of
           true ->
               PlainText = <<"Fake me!">>,
  
positive.code: init_per_group(engine_fakes_rsa, Config) ->
      case crypto:info_lib() of
          [{<<"OpenSSL">>,LibVer,_}] when is_integer(LibVer), LibVer >= 16#10100000 ->
              group_load_engine(Config,  []);
          _ ->
              {skip, "Too low OpenSSL cryptolib version"}
      end;
  
negative.code:     case load_storage_engine(Config, ExcludeMthds) of
          {ok, E} ->
              KeyDir = key_dir(Config),
              ct:log("storage engine ~p loaded.~nKeyDir = ~p", [E,KeyDir]),
              [{storage_engine,E}, {storage_dir,KeyDir} | Config];
          {error, notexist} ->
              {skip, "OTP Test engine not found"};
  