make 2fa UI less awful

[akkoma] / lib / pleroma / web / plugs / http_security_plug.ex

diff --git a/lib/pleroma/web/plugs/http_security_plug.ex b/lib/pleroma/web/plugs/http_security_plug.ex
index 43b075447e71cb37858f88243baf4b44aa6c45fe..5f0b775bea9e1025b28bdbc03111308743f7c02a 100644 (file)
--- a/lib/pleroma/web/plugs/http_security_plug.ex
+++ b/lib/pleroma/web/plugs/http_security_plug.ex
@@ -13,7 +13,7 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
   def call(conn, _options) do
     if Config.get([:http_security, :enabled]) do
       conn
-      |> merge_resp_headers(headers())
+      |> merge_resp_headers(headers(conn))
       |> maybe_send_sts_header(Config.get([:http_security, :sts]))
     else
       conn
@@ -36,19 +36,19 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
     end
   end
 
-  def headers do
+  @spec headers(Plug.Conn.t()) :: [{String.t(), String.t()}]
+  def headers(conn) do
     referrer_policy = Config.get([:http_security, :referrer_policy])
     report_uri = Config.get([:http_security, :report_uri])
     custom_http_frontend_headers = custom_http_frontend_headers()
 
     headers = [
-      {"x-xss-protection", "1; mode=block"},
+      {"x-xss-protection", "0"},
       {"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(conn)},
       {"permissions-policy", "interest-cohort=()"}
     ]
 
@@ -76,21 +76,20 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
 
   static_csp_rules = [
     "default-src 'none'",
-    "base-uri 'self'",
+    "base-uri 'none'",
     "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
+  defp csp_string(conn) do
     scheme = Config.get([Pleroma.Web.Endpoint, :url])[:scheme]
     static_url = Pleroma.Web.Endpoint.static_url()
     websocket_url = Pleroma.Web.Endpoint.websocket_url()
     report_uri = Config.get([:http_security, :report_uri])
-
+    %{assigns: %{csp_nonce: nonce}} = conn
+    nonce_tag = "nonce-" <> nonce
     img_src = "img-src 'self' data: blob:"
     media_src = "media-src 'self'"
 
@@ -104,18 +103,22 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
         {[img_src, " https:"], [media_src, " https:"]}
       end
 
-    connect_src = if Config.get([:media_proxy, :enabled]) do
-      sources = build_csp_multimedia_source_list()
-      ["connect-src 'self' blob: ", static_url, ?\s, websocket_url, ?\s, sources]
-    else
-      ["connect-src 'self' blob: ", static_url, ?\s, websocket_url]
-    end
+    connect_src =
+      if Config.get([:media_proxy, :enabled]) do
+        sources = build_csp_multimedia_source_list()
+        ["connect-src 'self' blob: ", static_url, ?\s, websocket_url, ?\s, sources]
+      else
+        ["connect-src 'self' blob: ", static_url, ?\s, websocket_url]
+      end
+
+    style_src = "style-src 'self' 'unsafe-inline'"
+    font_src = "font-src 'self' data:"
 
     script_src =
       if Config.get(:env) == :dev do
-        "script-src 'self' 'unsafe-eval'"
+        "script-src 'self' 'unsafe-eval' '#{nonce_tag}'"
       else
-        "script-src 'self'"
+        "script-src 'self' '#{nonce_tag}'"
       end
 
     report = if report_uri, do: ["report-uri ", report_uri, ";report-to csp-endpoint"]
@@ -126,6 +129,8 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
     |> add_csp_param(media_src)
     |> add_csp_param(connect_src)
     |> add_csp_param(script_src)
+    |> add_csp_param(font_src)
+    |> add_csp_param(style_src)
     |> add_csp_param(insecure)
     |> add_csp_param(report)
     |> :erlang.iolist_to_binary()
@@ -236,11 +241,9 @@ your instance and your users via malicious posts:
 
   defp maybe_send_sts_header(conn, true) do
     max_age_sts = Config.get([:http_security, :sts_max_age])
-    max_age_ct = Config.get([:http_security, :ct_max_age])
 
     merge_resp_headers(conn, [
-      {"strict-transport-security", "max-age=#{max_age_sts}; includeSubDomains"},
-      {"expect-ct", "enforce, max-age=#{max_age_ct}"}
+      {"strict-transport-security", "max-age=#{max_age_sts}; includeSubDomains; preload"}
     ])
   end