git.squeep.com Git - akkoma/blob - lib/pleroma/captcha/kocaptcha.ex

   1 defmodule Pleroma.Captcha.Kocaptcha do
   2   alias Pleroma.Captcha.Service
   3   @behaviour Service
   4
   5   @ets __MODULE__.Ets
   6
   7   @impl Service
   8   def new() do
   9     endpoint = Pleroma.Config.get!([__MODULE__, :endpoint])
  10     case HTTPoison.get(endpoint <> "/new") do
  11       {:error, _} ->
  12         %{error: "Kocaptcha service unavailable"}
  13       {:ok, res} ->
  14         json_resp = Poison.decode!(res.body)
  15
  16         token = json_resp["token"]
  17
  18         true = :ets.insert(@ets, {token, json_resp["md5"]})
  19
  20         %{type: :kocaptcha, token: token, url: endpoint <> json_resp["url"]}
  21     end
  22   end
  23
  24   @impl Service
  25   def validate(token, captcha) do
  26     with false <- is_nil(captcha),
  27          [{^token, saved_md5}] <- :ets.lookup(@ets, token),
  28          true <- (:crypto.hash(:md5, captcha) |> Base.encode16) == String.upcase(saved_md5) do
  29       # Clear the saved value
  30       :ets.delete(@ets, token)
  31
  32       true
  33     else
  34       _ -> false
  35     end
  36   end
  37 end