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diff --git a/lib/pleroma/captcha/native.ex b/lib/pleroma/captcha/native.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Captcha.Native do
+  alias Pleroma.Captcha.Service
+  @behaviour Service
+
+  @impl Service
+  def new do
+    case Captcha.get() do
+      :error ->
+        %{error: :captcha_error}
+
+      {:ok, answer_data, img_binary} ->
+        %{
+          type: :native,
+          token: token(),
+          url: "data:image/png;base64," <> Base.encode64(img_binary),
+          answer_data: answer_data
+        }
+    end
+  end
+
+  @impl Service
+  def validate(_token, captcha, captcha) when not is_nil(captcha), do: :ok
+  def validate(_token, _captcha, _answer), do: {:error, :invalid}
+
+  defp token do
+    10
+    |> :crypto.strong_rand_bytes()
+    |> Base.url_encode64(padding: false)
+  end
+end