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Merge branch 'retire-mrfs' into 'develop'

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Retire MRFs DNSRBL, FODirectReply, and QuietReply

See merge request pleroma/pleroma!4330
This commit is contained in:
feld 2025-03-01 01:12:31 +00:00
commit b770850903
7 changed files with 1 additions and 521 deletions
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1
changelog.d/retire_mrfs.remove Normal file
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@ -0,0 +1 @@
Retire MRFs DNSRBL, FODirectReply, and QuietReply

5
config/config.exs
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@ -413,11 +413,6 @@ config :pleroma, :mrf_vocabulary,
accept: [],
reject: []
config :pleroma, :mrf_dnsrbl,
nameserver: "127.0.0.1",
port: 53,
zone: "bl.pleroma.com"
# threshold of 7 days
config :pleroma, :mrf_object_age,
threshold: 604_800,

146
lib/pleroma/web/activity_pub/mrf/dnsrbl_policy.ex
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@ -1,146 +0,0 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2024 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.DNSRBLPolicy do
@moduledoc """
Dynamic activity filtering based on an RBL database
This MRF makes queries to a custom DNS server which will
respond with values indicating the classification of the domain
the activity originated from. This method has been widely used
in the email anti-spam industry for very fast reputation checks.
e.g., if the DNS response is 127.0.0.1 or empty, the domain is OK
Other values such as 127.0.0.2 may be used for specific classifications.
Information for why the host is blocked can be stored in a corresponding TXT record.
This method is fail-open so if the queries fail the activites are accepted.
An example of software meant for this purpsoe is rbldnsd which can be found
at http://www.corpit.ru/mjt/rbldnsd.html or mirrored at
https://git.pleroma.social/feld/rbldnsd
It is highly recommended that you run your own copy of rbldnsd and use an
external mechanism to sync/share the contents of the zone file. This is
important to keep the latency on the queries as low as possible and prevent
your DNS server from being attacked so it fails and content is permitted.
"""
@behaviour Pleroma.Web.ActivityPub.MRF.Policy
alias Pleroma.Config
require Logger
@query_retries 1
@query_timeout 500
@impl true
def filter(%{"actor" => actor} = activity) do
actor_info = URI.parse(actor)
with {:ok, activity} <- check_rbl(actor_info, activity) do
{:ok, activity}
else
_ -> {:reject, "[DNSRBLPolicy]"}
end
end
@impl true
def filter(activity), do: {:ok, activity}
@impl true
def describe do
mrf_dnsrbl =
Config.get(:mrf_dnsrbl)
|> Enum.into(%{})
{:ok, %{mrf_dnsrbl: mrf_dnsrbl}}
end
@impl true
def config_description do
%{
key: :mrf_dnsrbl,
related_policy: "Pleroma.Web.ActivityPub.MRF.DNSRBLPolicy",
label: "MRF DNSRBL",
description: "DNS RealTime Blackhole Policy",
children: [
%{
key: :nameserver,
type: {:string},
description: "DNSRBL Nameserver to Query (IP or hostame)",
suggestions: ["127.0.0.1"]
},
%{
key: :port,
type: {:string},
description: "Nameserver port",
suggestions: ["53"]
},
%{
key: :zone,
type: {:string},
description: "Root zone for querying",
suggestions: ["bl.pleroma.com"]
}
]
}
end
defp check_rbl(%{host: actor_host}, activity) do
with false <- match?(^actor_host, Pleroma.Web.Endpoint.host()),
zone when not is_nil(zone) <- Keyword.get(Config.get([:mrf_dnsrbl]), :zone) do
query =
Enum.join([actor_host, zone], ".")
|> String.to_charlist()
rbl_response = rblquery(query)
if Enum.empty?(rbl_response) do
{:ok, activity}
else
Task.start(fn ->
reason =
case rblquery(query, :txt) do
[[result]] -> result
_ -> "undefined"
end
Logger.warning(
"DNSRBL Rejected activity from #{actor_host} for reason: #{inspect(reason)}"
)
end)
:error
end
else
_ -> {:ok, activity}
end
end
defp get_rblhost_ip(rblhost) do
case rblhost |> String.to_charlist() |> :inet_parse.address() do
{:ok, _} -> rblhost |> String.to_charlist() |> :inet_parse.address()
_ -> {:ok, rblhost |> String.to_charlist() |> :inet_res.lookup(:in, :a) |> Enum.random()}
end
end
defp rblquery(query, type \\ :a) do
config = Config.get([:mrf_dnsrbl])
case get_rblhost_ip(config[:nameserver]) do
{:ok, rblnsip} ->
:inet_res.lookup(query, :in, type,
nameservers: [{rblnsip, config[:port]}],
timeout: @query_timeout,
retry: @query_retries
)
_ ->
[]
end
end
end

53
lib/pleroma/web/activity_pub/mrf/fo_direct_reply.ex
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@ -1,53 +0,0 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2024 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.FODirectReply do
@moduledoc """
FODirectReply alters the scope of replies to activities which are Followers Only to be Direct. The purpose of this policy is to prevent broken threads for followers of the reply author because their response was to a user that they are not also following.
"""
alias Pleroma.Object
alias Pleroma.User
alias Pleroma.Web.ActivityPub.Visibility
@behaviour Pleroma.Web.ActivityPub.MRF.Policy
@impl true
def filter(
%{
"type" => "Create",
"to" => to,
"object" => %{
"actor" => actor,
"type" => "Note",
"inReplyTo" => in_reply_to
}
} = activity
) do
with true <- is_binary(in_reply_to),
%User{follower_address: followers_collection, local: true} <- User.get_by_ap_id(actor),
%Object{} = in_reply_to_object <- Object.get_by_ap_id(in_reply_to),
"private" <- Visibility.get_visibility(in_reply_to_object) do
direct_to = to -- [followers_collection]
updated_activity =
activity
|> Map.put("cc", [])
|> Map.put("to", direct_to)
|> Map.put("directMessage", true)
|> put_in(["object", "cc"], [])
|> put_in(["object", "to"], direct_to)
{:ok, updated_activity}
else
_ -> {:ok, activity}
end
end
@impl true
def filter(activity), do: {:ok, activity}
@impl true
def describe, do: {:ok, %{}}
end

60
lib/pleroma/web/activity_pub/mrf/quiet_reply.ex
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@ -1,60 +0,0 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.QuietReply do
@moduledoc """
QuietReply alters the scope of activities from local users when replying by enforcing them to be "Unlisted" or "Quiet Public". This delivers the activity to all the expected recipients and instances, but it will not be published in the Federated / The Whole Known Network timelines. It will still be published to the Home timelines of the user's followers and visible to anyone who opens the thread.
"""
require Pleroma.Constants
alias Pleroma.User
@behaviour Pleroma.Web.ActivityPub.MRF.Policy
@impl true
def history_awareness, do: :auto
@impl true
def filter(
%{
"type" => "Create",
"to" => to,
"cc" => cc,
"object" => %{
"actor" => actor,
"type" => "Note",
"inReplyTo" => in_reply_to
}
} = activity
) do
with true <- is_binary(in_reply_to),
false <- match?([], cc),
%User{follower_address: followers_collection, local: true} <-
User.get_by_ap_id(actor) do
updated_to =
to
|> Kernel.++([followers_collection])
|> Kernel.--([Pleroma.Constants.as_public()])
updated_cc = [Pleroma.Constants.as_public()]
updated_activity =
activity
|> Map.put("to", updated_to)
|> Map.put("cc", updated_cc)
|> put_in(["object", "to"], updated_to)
|> put_in(["object", "cc"], updated_cc)
{:ok, updated_activity}
else
_ -> {:ok, activity}
end
end
@impl true
def filter(activity), do: {:ok, activity}
@impl true
def describe, do: {:ok, %{}}
end

117
test/pleroma/web/activity_pub/mrf/fo_direct_reply_test.exs
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@ -1,117 +0,0 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.FODirectReplyTest do
use Pleroma.DataCase
import Pleroma.Factory
require Pleroma.Constants
alias Pleroma.Object
alias Pleroma.Web.ActivityPub.MRF.FODirectReply
alias Pleroma.Web.CommonAPI
test "replying to followers-only/private is changed to direct" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} =
CommonAPI.post(batman, %{
status: "Has anyone seen Selina Kyle's latest selfies?",
visibility: "private"
})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman 🤤 ❤️ 🐈‍⬛",
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
expected_to = [batman.ap_id]
expected_cc = []
assert {:ok, filtered} = FODirectReply.filter(reply)
assert expected_to == filtered["to"]
assert expected_cc == filtered["cc"]
assert expected_to == filtered["object"]["to"]
assert expected_cc == filtered["object"]["cc"]
end
test "replies to unlisted posts are unmodified" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} =
CommonAPI.post(batman, %{
status: "Has anyone seen Selina Kyle's latest selfies?",
visibility: "unlisted"
})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman 🤤 ❤️ 🐈<200d>⬛",
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
assert {:ok, filtered} = FODirectReply.filter(reply)
assert match?(^filtered, reply)
end
test "replies to public posts are unmodified" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} =
CommonAPI.post(batman, %{status: "Has anyone seen Selina Kyle's latest selfies?"})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman 🤤 ❤️ 🐈<200d>⬛",
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
assert {:ok, filtered} = FODirectReply.filter(reply)
assert match?(^filtered, reply)
end
test "non-reply posts are unmodified" do
batman = insert(:user, nickname: "batman")
{:ok, post} = CommonAPI.post(batman, %{status: "To the Batmobile!"})
assert {:ok, filtered} = FODirectReply.filter(post)
assert match?(^filtered, post)
end
end

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test/pleroma/web/activity_pub/mrf/quiet_reply_test.exs
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@ -1,140 +0,0 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.QuietReplyTest do
use Pleroma.DataCase
import Pleroma.Factory
require Pleroma.Constants
alias Pleroma.Object
alias Pleroma.Web.ActivityPub.MRF.QuietReply
alias Pleroma.Web.CommonAPI
test "replying to public post is forced to be quiet" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} = CommonAPI.post(batman, %{status: "To the Batmobile!"})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [
batman.ap_id,
Pleroma.Constants.as_public()
],
"cc" => [robin.follower_address],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman Wait up, I forgot my spandex!",
"to" => [
batman.ap_id,
Pleroma.Constants.as_public()
],
"cc" => [robin.follower_address],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
expected_to = [batman.ap_id, robin.follower_address]
expected_cc = [Pleroma.Constants.as_public()]
assert {:ok, filtered} = QuietReply.filter(reply)
assert expected_to == filtered["to"]
assert expected_cc == filtered["cc"]
assert expected_to == filtered["object"]["to"]
assert expected_cc == filtered["object"]["cc"]
end
test "replying to unlisted post is unmodified" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} = CommonAPI.post(batman, %{status: "To the Batmobile!", visibility: "private"})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [batman.ap_id],
"cc" => [],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman Wait up, I forgot my spandex!",
"to" => [batman.ap_id],
"cc" => [],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
assert {:ok, filtered} = QuietReply.filter(reply)
assert match?(^filtered, reply)
end
test "replying direct is unmodified" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} = CommonAPI.post(batman, %{status: "To the Batmobile!"})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [batman.ap_id],
"cc" => [],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman Wait up, I forgot my spandex!",
"to" => [batman.ap_id],
"cc" => [],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
assert {:ok, filtered} = QuietReply.filter(reply)
assert match?(^filtered, reply)
end
test "replying followers-only is unmodified" do
batman = insert(:user, nickname: "batman")
robin = insert(:user, nickname: "robin")
{:ok, post} = CommonAPI.post(batman, %{status: "To the Batmobile!"})
reply = %{
"type" => "Create",
"actor" => robin.ap_id,
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"object" => %{
"type" => "Note",
"actor" => robin.ap_id,
"content" => "@batman Wait up, I forgot my spandex!",
"to" => [batman.ap_id, robin.follower_address],
"cc" => [],
"inReplyTo" => Object.normalize(post).data["id"]
}
}
assert {:ok, filtered} = QuietReply.filter(reply)
assert match?(^filtered, reply)
end
test "non-reply posts are unmodified" do
batman = insert(:user, nickname: "batman")
{:ok, post} = CommonAPI.post(batman, %{status: "To the Batmobile!"})
assert {:ok, filtered} = QuietReply.filter(post)
assert match?(^filtered, post)
end
end