104 lines
2.8 KiB
Elixir
104 lines
2.8 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Plugs.HTTPSecurityPlug do
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alias Pleroma.Config
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import Plug.Conn
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def init(opts), do: opts
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def call(conn, _options) do
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if Config.get([:http_security, :enabled]) do
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conn
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|> merge_resp_headers(headers())
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|> maybe_send_sts_header(Config.get([:http_security, :sts]))
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else
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conn
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end
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end
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defp headers do
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referrer_policy = Config.get([:http_security, :referrer_policy])
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report_uri = Config.get([:http_security, :report_uri])
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headers = [
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{"x-xss-protection", "1; mode=block"},
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{"x-permitted-cross-domain-policies", "none"},
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{"x-frame-options", "DENY"},
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{"x-content-type-options", "nosniff"},
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{"referrer-policy", referrer_policy},
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{"x-download-options", "noopen"},
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{"content-security-policy", csp_string() <> ";"}
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]
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if report_uri do
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report_group = %{
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"group" => "csp-endpoint",
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"max-age" => 10_886_400,
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"endpoints" => [
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%{"url" => report_uri}
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]
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}
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headers ++ [{"reply-to", Jason.encode!(report_group)}]
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else
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headers
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end
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end
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defp csp_string do
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scheme = Config.get([Pleroma.Web.Endpoint, :url])[:scheme]
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static_url = Pleroma.Web.Endpoint.static_url()
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websocket_url = Pleroma.Web.Endpoint.websocket_url()
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report_uri = Config.get([:http_security, :report_uri])
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connect_src = "connect-src 'self' #{static_url} #{websocket_url}"
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connect_src =
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if Mix.env() == :dev do
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connect_src <> " http://localhost:3035/"
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else
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connect_src
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end
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script_src =
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if Mix.env() == :dev do
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"script-src 'self' 'unsafe-eval'"
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else
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"script-src 'self'"
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end
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main_part = [
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"default-src 'none'",
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"base-uri 'self'",
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"frame-ancestors 'none'",
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"img-src 'self' data: https:",
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"media-src 'self' https:",
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"style-src 'self' 'unsafe-inline'",
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"font-src 'self'",
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"manifest-src 'self'",
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connect_src,
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script_src
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]
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report = if report_uri, do: ["report-uri #{report_uri}; report-to csp-endpoint"], else: []
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insecure = if scheme == "https", do: ["upgrade-insecure-requests"], else: []
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(main_part ++ report ++ insecure)
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|> Enum.join("; ")
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end
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defp maybe_send_sts_header(conn, true) do
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max_age_sts = Config.get([:http_security, :sts_max_age])
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max_age_ct = Config.get([:http_security, :ct_max_age])
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merge_resp_headers(conn, [
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{"strict-transport-security", "max-age=#{max_age_sts}; includeSubDomains"},
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{"expect-ct", "enforce, max-age=#{max_age_ct}"}
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])
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end
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defp maybe_send_sts_header(conn, _), do: conn
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end
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