def filter(object), do: {:ok, object}
+ defp obfuscate(string) when is_binary(string) do
+ string
+ |> to_charlist()
+ |> Enum.with_index()
+ |> Enum.map(fn
+ {?., _index} ->
+ ?.
+
+ {char, index} ->
+ if 3 <= index && index < String.length(string) - 3, do: ?*, else: char
+ end)
+ |> to_string()
+ end
+
+ defp maybe_obfuscate(host, obfuscations) do
+ if MRF.subdomain_match?(obfuscations, host) do
+ obfuscate(host)
+ else
+ host
+ end
+ end
+
@impl true
def describe do
exclusions = Config.get([:mrf, :transparency_exclusions]) |> MRF.instance_list_from_tuples()
- mrf_simple =
+ obfuscations =
+ Config.get([:mrf, :transparency_obfuscate_domains], []) |> MRF.subdomains_regex()
+
+ mrf_simple_excluded =
Config.get(:mrf_simple)
- |> Enum.map(fn {k, v} -> {k, Enum.reject(v, fn {v, _} -> v in exclusions end)} end)
- |> Enum.map(fn {k, v} ->
- {k, Enum.map(v, fn {i, r} -> %{"instance" => i, "reason" => r} end)}
+ |> Enum.map(fn {rule, instances} ->
+ {rule, Enum.reject(instances, fn {host, _} -> host in exclusions end)}
+ end)
+
+ mrf_simple =
+ mrf_simple_excluded
+ |> Enum.map(fn {rule, instances} ->
+ {rule, Enum.map(instances, fn {host, _} -> maybe_obfuscate(host, obfuscations) end)}
+ end)
+ |> Map.new()
+
+ # This is for backwards compatibility. We originally didn't sent
+ # extra info like a reason why an instance was rejected/quarantined/etc.
+ # Because we didn't want to break backwards compatibility it was decided
+ # to add an extra "info" key.
+ mrf_simple_info =
+ mrf_simple_excluded
+ |> Enum.map(fn {rule, instances} ->
+ {rule, Enum.reject(instances, fn {_, reason} -> reason == "" end)}
+ end)
+ |> Enum.reject(fn {_, instances} -> instances == [] end)
+ |> Enum.map(fn {rule, instances} ->
+ instances =
+ instances
+ |> Enum.map(fn {host, reason} ->
+ {maybe_obfuscate(host, obfuscations), %{"reason" => reason}}
+ end)
+ |> Map.new()
+
+ {rule, instances}
end)
- |> Enum.into(%{})
+ |> Map.new()
- {:ok, %{mrf_simple: mrf_simple}}
+ {:ok, %{mrf_simple: mrf_simple, mrf_simple_info: mrf_simple_info}}
end
@impl true