X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fplugs%2Fhttp_security_plug.ex;h=c363b193b8573fc290000c4b4ebc47882506bf3d;hb=9c672ecbb5d4477cd16d2139a2cb66d3923ac5c8;hp=057553e2414757eaed4fd40f96774dc7af2babb9;hpb=0534463cef059d1af1e90007e13e27207876dd9f;p=akkoma
diff --git a/lib/pleroma/plugs/http_security_plug.ex b/lib/pleroma/plugs/http_security_plug.ex
index 057553e24..c363b193b 100644
--- a/lib/pleroma/plugs/http_security_plug.ex
+++ b/lib/pleroma/plugs/http_security_plug.ex
@@ -1,11 +1,13 @@
# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors
+# Copyright © 2017-2020 Pleroma Authors
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Plugs.HTTPSecurityPlug do
alias Pleroma.Config
import Plug.Conn
+ require Logger
+
def init(opts), do: opts
def call(conn, _options) do
@@ -20,52 +22,193 @@ defmodule Pleroma.Plugs.HTTPSecurityPlug do
defp headers do
referrer_policy = Config.get([:http_security, :referrer_policy])
+ report_uri = Config.get([:http_security, :report_uri])
- [
+ headers = [
{"x-xss-protection", "1; mode=block"},
{"x-permitted-cross-domain-policies", "none"},
{"x-frame-options", "DENY"},
{"x-content-type-options", "nosniff"},
{"referrer-policy", referrer_policy},
{"x-download-options", "noopen"},
- {"content-security-policy", csp_string() <> ";"}
+ {"content-security-policy", csp_string()}
]
+
+ if report_uri do
+ report_group = %{
+ "group" => "csp-endpoint",
+ "max-age" => 10_886_400,
+ "endpoints" => [
+ %{"url" => report_uri}
+ ]
+ }
+
+ [{"reply-to", Jason.encode!(report_group)} | headers]
+ else
+ headers
+ end
end
+ static_csp_rules = [
+ "default-src 'none'",
+ "base-uri 'self'",
+ "frame-ancestors 'none'",
+ "style-src 'self' 'unsafe-inline'",
+ "font-src 'self'",
+ "manifest-src 'self'"
+ ]
+
+ @csp_start [Enum.join(static_csp_rules, ";") <> ";"]
+
defp csp_string do
scheme = Config.get([Pleroma.Web.Endpoint, :url])[:scheme]
- websocket_url = String.replace(Pleroma.Web.Endpoint.static_url(), "http", "ws")
+ static_url = Pleroma.Web.Endpoint.static_url()
+ websocket_url = Pleroma.Web.Endpoint.websocket_url()
+ report_uri = Config.get([:http_security, :report_uri])
+
+ img_src = "img-src 'self' data: blob:"
+ media_src = "media-src 'self'"
+
+ # Strict multimedia CSP enforcement only when MediaProxy is enabled
+ {img_src, media_src} =
+ if Config.get([:media_proxy, :enabled]) &&
+ !Config.get([:media_proxy, :proxy_opts, :redirect_on_failure]) do
+ sources = build_csp_multimedia_source_list()
+ {[img_src, sources], [media_src, sources]}
+ else
+ {[img_src, " https:"], [media_src, " https:"]}
+ end
+
+ connect_src = ["connect-src 'self' blob: ", static_url, ?\s, websocket_url]
connect_src =
- if Mix.env() == :dev do
- "connect-src 'self' http://localhost:3035/ " <> websocket_url
+ if Config.get(:env) == :dev do
+ [connect_src, " http://localhost:3035/"]
else
- "connect-src 'self' " <> websocket_url
+ connect_src
end
script_src =
- if Mix.env() == :dev do
+ if Config.get(:env) == :dev do
"script-src 'self' 'unsafe-eval'"
else
"script-src 'self'"
end
- [
- "default-src 'none'",
- "base-uri 'self'",
- "frame-ancestors 'none'",
- "img-src 'self' data: https:",
- "media-src 'self' https:",
- "style-src 'self' 'unsafe-inline'",
- "font-src 'self'",
- "manifest-src 'self'",
- connect_src,
- script_src,
- if scheme == "https" do
- "upgrade-insecure-requests"
- end
- ]
- |> Enum.join("; ")
+ report = if report_uri, do: ["report-uri ", report_uri, ";report-to csp-endpoint"]
+ insecure = if scheme == "https", do: "upgrade-insecure-requests"
+
+ @csp_start
+ |> add_csp_param(img_src)
+ |> add_csp_param(media_src)
+ |> add_csp_param(connect_src)
+ |> add_csp_param(script_src)
+ |> add_csp_param(insecure)
+ |> add_csp_param(report)
+ |> :erlang.iolist_to_binary()
+ end
+
+ defp build_csp_from_whitelist([], acc), do: acc
+
+ defp build_csp_from_whitelist([last], acc) do
+ [build_csp_param_from_whitelist(last) | acc]
+ end
+
+ defp build_csp_from_whitelist([head | tail], acc) do
+ build_csp_from_whitelist(tail, [[?\s, build_csp_param_from_whitelist(head)] | acc])
+ end
+
+ # TODO: use `build_csp_param/1` after removing support bare domains for media proxy whitelist
+ defp build_csp_param_from_whitelist("http" <> _ = url) do
+ build_csp_param(url)
+ end
+
+ defp build_csp_param_from_whitelist(url), do: url
+
+ defp build_csp_multimedia_source_list do
+ media_proxy_whitelist =
+ [:media_proxy, :whitelist]
+ |> Config.get()
+ |> build_csp_from_whitelist([])
+
+ captcha_method = Config.get([Pleroma.Captcha, :method])
+ captcha_endpoint = Config.get([captcha_method, :endpoint])
+
+ base_endpoints =
+ [
+ [:media_proxy, :base_url],
+ [Pleroma.Upload, :base_url],
+ [Pleroma.Uploaders.S3, :public_endpoint]
+ ]
+ |> Enum.map(&Config.get/1)
+
+ [captcha_endpoint | base_endpoints]
+ |> Enum.map(&build_csp_param/1)
+ |> Enum.reduce([], &add_source(&2, &1))
+ |> add_source(media_proxy_whitelist)
+ end
+
+ defp add_source(iodata, nil), do: iodata
+ defp add_source(iodata, []), do: iodata
+ defp add_source(iodata, source), do: [[?\s, source] | iodata]
+
+ defp add_csp_param(csp_iodata, nil), do: csp_iodata
+
+ defp add_csp_param(csp_iodata, param), do: [[param, ?;] | csp_iodata]
+
+ defp build_csp_param(nil), do: nil
+
+ defp build_csp_param(url) when is_binary(url) do
+ %{host: host, scheme: scheme} = URI.parse(url)
+
+ if scheme do
+ [scheme, "://", host]
+ end
+ end
+
+ def warn_if_disabled do
+ unless Config.get([:http_security, :enabled]) do
+ Logger.warn("
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+ izAotX7777777777777777777777777777777777777777Y7n92:
+ .;CoIIIIIUAA666666699999ZZZZZZZZZZZZZZZZZZZZ6ov.
+
+HTTP Security is disabled. Please re-enable it to prevent users from attacking
+your instance and your users via malicious posts:
+
+ config :pleroma, :http_security, enabled: true
+ ")
+ end
end
defp maybe_send_sts_header(conn, true) do