# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# 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
{"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
]
}
- headers ++ [{"reply-to", Jason.encode!(report_group)}]
+ [{"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]
static_url = Pleroma.Web.Endpoint.static_url()
websocket_url = Pleroma.Web.Endpoint.websocket_url()
report_uri = Config.get([:http_security, :report_uri])
- connect_src = "connect-src 'self' #{static_url} #{websocket_url}"
+ img_src = "img-src 'self' data: blob:"
+ media_src = "media-src 'self'"
+
+ {img_src, media_src} =
+ if Config.get([:media_proxy, :enabled]) &&
+ !Config.get([:media_proxy, :proxy_opts, :redirect_on_failure]) do
+ sources = get_proxy_and_attachment_sources()
+ {[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 Pleroma.Config.get(:env) == :dev do
- connect_src <> " http://localhost:3035/"
+ [connect_src, " http://localhost:3035/"]
else
connect_src
end
"script-src 'self'"
end
- main_part = [
- "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
- ]
-
- report = if report_uri, do: ["report-uri #{report_uri}; report-to csp-endpoint"], else: []
+ 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
- insecure = if scheme == "https", do: ["upgrade-insecure-requests"], else: []
+ defp get_proxy_and_attachment_sources do
+ media_proxy_whitelist =
+ Enum.reduce(Config.get([:media_proxy, :whitelist]), [], fn host, acc ->
+ add_source(acc, host)
+ end)
+
+ media_proxy_base_url =
+ if Config.get([:media_proxy, :base_url]),
+ do: URI.parse(Config.get([:media_proxy, :base_url])).host
+
+ upload_base_url =
+ if Config.get([Pleroma.Upload, :base_url]),
+ do: URI.parse(Config.get([Pleroma.Upload, :base_url])).host
+
+ s3_endpoint =
+ if Config.get([Pleroma.Upload, :uploader]) == Pleroma.Uploaders.S3,
+ do: URI.parse(Config.get([Pleroma.Uploaders.S3, :public_endpoint])).host
+
+ []
+ |> add_source(media_proxy_base_url)
+ |> add_source(upload_base_url)
+ |> add_source(s3_endpoint)
+ |> add_source(media_proxy_whitelist)
+ end
- (main_part ++ report ++ insecure)
- |> Enum.join("; ")
+ defp add_source(iodata, nil), 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]
+
+ def warn_if_disabled do
+ unless Config.get([:http_security, :enabled]) do
+ Logger.warn("
+ .i;;;;i.
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+ i7i ... .#MM@M@C. .....:71i
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+ .nC. ..... IMMMQ..,::::::,.,czX.
+ .ct: ....... .ZMMMI..,:::::::,,:76Y.
+ c2: ......,i..Y$M@t..:::::::,,..inZY
+ vov ......:ii..c$MBc..,,,,,,,,,,..iI9i
+ i9Y ......iii:..7@MA,..,,,,,,,,,....;AA:
+ iIS. ......:ii::..;@MI....,............;Ez.
+ .I9. ......:i::::...8M1..................C0z.
+ .z9; ......:i::::,.. .i:...................zWX.
+ vbv ......,i::::,,. ................. :AQY
+ c6Y. .,...,::::,,..:t0@@QY. ................ :8bi
+ :6S. ..,,...,:::,,,..EMMMMMMI. ............... .;bZ,
+ :6o, .,,,,..:::,,,..i#MMMMMM#v................. YW2.
+ .n8i ..,,,,,,,::,,,,.. tMMMMM@C:.................. .1Wn
+ 7Uc. .:::,,,,,::,,,,.. i1t;,..................... .UEi
+ 7C...::::::::::::,,,,.. .................... vSi.
+ ;1;...,,::::::,......... .................. Yz:
+ v97,......... .voC.
+ 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
projects / akkoma / blobdiff