authentication_plug.ex
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authentication_plug.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Plugs.AuthenticationPlug do
	alias Comeonin.Pbkdf2
	import Plug.Conn
	alias Pleroma.User
	require Logger

	def init(options), do: options

	def checkpw(password, "$6" <> _ = password_hash) do
	:crypt.crypt(password, password_hash) == password_hash
	end

	def checkpw(password, "$pbkdf2" <> _ = password_hash) do
	Pbkdf2.checkpw(password, password_hash)
	end

	def checkpw(_password, _password_hash) do
	Logger.error("Password hash not recognized")
	false
	end

	def call(%{assigns: %{user: %User{}}} = conn, _), do: conn

	def call(
	%{
	assigns: %{
	auth_user: %{password_hash: password_hash} = auth_user,
	auth_credentials: %{password: password}
	}
	} = conn,
	_
	) do
	if Pbkdf2.checkpw(password, password_hash) do
	conn
	\|> assign(:user, auth_user)
	else
	conn
	end
	end

	def call(%{assigns: %{auth_credentials: %{password: _}}} = conn, _) do
	Pbkdf2.dummy_checkpw()
	conn
	end

	def call(conn, _), do: conn
	end