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akkoma/lib/pleroma/captcha/kocaptcha.ex

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Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Captcha.Kocaptcha do
alias Pleroma.Captcha.Service
@behaviour Service
@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 = Jason.decode!(res.body)
%{
type: :kocaptcha,
token: json_resp["token"],
url: endpoint <> json_resp["url"],
answer_data: json_resp["md5"]
}
end
end
@impl Service
def validate(_token, captcha, answer_data) do
# Here the token is unsed, because the unencrypted captcha answer is just passed to method
if not is_nil(captcha) and
:crypto.hash(:md5, captcha) |> Base.encode16() == String.upcase(answer_data),
do: :ok,
else: {:error, :invalid}
end
end