72 lines
1.7 KiB
Elixir
72 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Captcha.Kocaptcha do
|
|
alias Calendar.DateTime
|
|
|
|
alias Pleroma.Captcha.Service
|
|
@behaviour Service
|
|
|
|
@ets __MODULE__.Ets
|
|
|
|
@impl Service
|
|
def new() do
|
|
endpoint = Pleroma.Config.get!([__MODULE__, :endpoint])
|
|
|
|
case Tesla.get(endpoint <> "/new") do
|
|
{:error, _} ->
|
|
%{error: "Kocaptcha service unavailable"}
|
|
|
|
{:ok, res} ->
|
|
json_resp = Poison.decode!(res.body)
|
|
|
|
token = json_resp["token"]
|
|
|
|
true =
|
|
:ets.insert(
|
|
@ets,
|
|
{token, json_resp["md5"], DateTime.now_utc() |> DateTime.Format.unix()}
|
|
)
|
|
|
|
%{type: :kocaptcha, token: token, url: endpoint <> json_resp["url"]}
|
|
end
|
|
end
|
|
|
|
@impl Service
|
|
def validate(token, captcha) do
|
|
with false <- is_nil(captcha),
|
|
[{^token, saved_md5, _}] <- :ets.lookup(@ets, token),
|
|
true <- :crypto.hash(:md5, captcha) |> Base.encode16() == String.upcase(saved_md5) do
|
|
# Clear the saved value
|
|
:ets.delete(@ets, token)
|
|
|
|
true
|
|
else
|
|
_ -> false
|
|
end
|
|
end
|
|
|
|
@impl Service
|
|
def cleanup() do
|
|
seconds_retained = Pleroma.Config.get!([Pleroma.Captcha, :seconds_retained])
|
|
# If the time in ETS is less than current_time - seconds_retained, then the time has
|
|
# already passed
|
|
delete_after =
|
|
DateTime.subtract!(DateTime.now_utc(), seconds_retained) |> DateTime.Format.unix()
|
|
|
|
:ets.select_delete(
|
|
@ets,
|
|
[
|
|
{
|
|
{:_, :_, :"$1"},
|
|
[{:<, :"$1", {:const, delete_after}}],
|
|
[true]
|
|
}
|
|
]
|
|
)
|
|
|
|
:ok
|
|
end
|
|
end
|