72 lines
1.7 KiB
Elixir
72 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Captcha.Kocaptcha do
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alias Calendar.DateTime
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alias Pleroma.Captcha.Service
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@behaviour Service
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@ets __MODULE__.Ets
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@impl Service
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def new() do
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endpoint = Pleroma.Config.get!([__MODULE__, :endpoint])
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case Tesla.get(endpoint <> "/new") do
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{:error, _} ->
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%{error: "Kocaptcha service unavailable"}
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{:ok, res} ->
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json_resp = Poison.decode!(res.body)
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token = json_resp["token"]
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true =
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:ets.insert(
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@ets,
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{token, json_resp["md5"], DateTime.now_utc() |> DateTime.Format.unix()}
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)
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%{type: :kocaptcha, token: token, url: endpoint <> json_resp["url"]}
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end
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end
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@impl Service
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def validate(token, captcha) do
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with false <- is_nil(captcha),
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[{^token, saved_md5, _}] <- :ets.lookup(@ets, token),
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true <- :crypto.hash(:md5, captcha) |> Base.encode16() == String.upcase(saved_md5) do
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# Clear the saved value
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:ets.delete(@ets, token)
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true
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else
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_ -> false
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end
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end
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@impl Service
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def cleanup() do
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seconds_retained = Pleroma.Config.get!([Pleroma.Captcha, :seconds_retained])
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# If the time in ETS is less than current_time - seconds_retained, then the time has
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# already passed
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delete_after =
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DateTime.subtract!(DateTime.now_utc(), seconds_retained) |> DateTime.Format.unix()
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:ets.select_delete(
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@ets,
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[
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{
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{:_, :_, :"$1"},
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[{:<, :"$1", {:const, delete_after}}],
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[true]
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}
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]
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)
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:ok
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end
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end
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