akkoma/lib/pleroma/web/activity_pub/mrf.ex
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Support elixir1.15
OTP builds to 1.15

Changelog entry

Ensure policies are fully loaded

Fix :warn

use main branch for linkify

Fix warn in tests

Migrations for phoenix 1.17

Revert "Migrations for phoenix 1.17"

This reverts commit 6a3b2f15b7.

Oban upgrade

Add default empty whitelist

mix format

limit test to amd64

OTP 26 tests for 1.15

use OTP_VERSION tag

baka

just 1.15

Massive deps update

Update locale, deps

Mix format

shell????

multiline???

?

max cases 1

use assert_recieve

don't put_env in async tests

don't async conn/fs tests

mix format

FIx some uploader issues

Fix tests
2023-08-03 17:44:09 +01:00

259 lines
7.6 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF do
require Logger
@behaviour Pleroma.Web.ActivityPub.MRF.PipelineFiltering
@mrf_config_descriptions [
%{
group: :pleroma,
key: :mrf,
tab: :mrf,
label: "MRF",
type: :group,
description: "General MRF settings",
children: [
%{
key: :policies,
type: [:module, {:list, :module}],
description:
"A list of MRF policies enabled. Module names are shortened (removed leading `Pleroma.Web.ActivityPub.MRF.` part), but on adding custom module you need to use full name.",
suggestions: {:list_behaviour_implementations, Pleroma.Web.ActivityPub.MRF.Policy}
},
%{
key: :transparency,
label: "MRF transparency",
type: :boolean,
description:
"Make the content of your Message Rewrite Facility settings public (via nodeinfo)"
},
%{
key: :transparency_exclusions,
label: "MRF transparency exclusions",
type: {:list, :tuple},
key_placeholder: "instance",
value_placeholder: "reason",
description:
"Exclude specific instance names from MRF transparency. The use of the exclusions feature will be disclosed in nodeinfo as a boolean value. You can also provide a reason for excluding these instance names. The instances and reasons won't be publicly disclosed.",
suggestions: [
"exclusion.com"
]
},
%{
key: :transparency_obfuscate_domains,
label: "MRF domain obfuscation",
type: {:list, :string},
description:
"Obfuscate domains in MRF transparency. This is useful if the domain you're blocking contains words you don't want displayed, but still want to disclose the MRF settings.",
suggestions: [
"badword.com"
]
}
]
}
]
@default_description %{
label: "",
description: ""
}
@required_description_keys [:key, :related_policy]
def filter_one(policy, %{"type" => type} = message)
when type in ["Undo", "Block", "Delete"] and
policy != Pleroma.Web.ActivityPub.MRF.SimplePolicy do
{:ok, message}
end
def filter_one(policy, message) do
Code.ensure_loaded!(policy)
should_plug_history? =
if function_exported?(policy, :history_awareness, 0) do
policy.history_awareness()
else
:manual
end
|> Kernel.==(:auto)
if not should_plug_history? do
policy.filter(message)
else
main_result = policy.filter(message)
with {_, {:ok, main_message}} <- {:main, main_result},
{_,
%{
"formerRepresentations" => %{
"orderedItems" => [_ | _]
}
}} = {_, object} <- {:object, message["object"]},
{_, {:ok, new_history}} <-
{:history,
Pleroma.Object.Updater.for_each_history_item(
object["formerRepresentations"],
object,
fn item ->
with {:ok, filtered} <- policy.filter(Map.put(message, "object", item)) do
{:ok, filtered["object"]}
else
e -> e
end
end
)} do
{:ok, put_in(main_message, ["object", "formerRepresentations"], new_history)}
else
{:main, _} -> main_result
{:object, _} -> main_result
{:history, e} -> e
end
end
end
def filter(policies, %{} = message) do
policies
|> Enum.reduce({:ok, message}, fn
policy, {:ok, message} -> filter_one(policy, message)
_, error -> error
end)
end
def filter(%{} = object), do: get_policies() |> filter(object)
@impl true
def pipeline_filter(%{} = message, meta) do
object = meta[:object_data]
ap_id = message["object"]
if object && ap_id do
with {:ok, message} <- filter(Map.put(message, "object", object)) do
meta = Keyword.put(meta, :object_data, message["object"])
{:ok, Map.put(message, "object", ap_id), meta}
else
{err, message} -> {err, message, meta}
end
else
{err, message} = filter(message)
{err, message, meta}
end
end
def get_policies do
Pleroma.Config.get([:mrf, :policies], [])
|> get_policies()
|> Enum.concat([
Pleroma.Web.ActivityPub.MRF.HashtagPolicy,
Pleroma.Web.ActivityPub.MRF.InlineQuotePolicy,
Pleroma.Web.ActivityPub.MRF.NormalizeMarkup,
Pleroma.Web.ActivityPub.MRF.DirectMessageDisabledPolicy
])
|> Enum.uniq()
end
defp get_policies(policy) when is_atom(policy), do: [policy]
defp get_policies(policies) when is_list(policies), do: policies
defp get_policies(_), do: []
# Matches the following:
# - https://baddomain.net
# - https://extra.baddomain.net/
# Does NOT match the following:
# - https://maybebaddomain.net/
# *.baddomain.net
def subdomain_regex("*." <> domain), do: subdomain_regex(domain)
# baddomain.net
def subdomain_regex(domain) do
if String.ends_with?(domain, ".*") do
~r/^(.+\.)?#{Regex.escape(String.replace_suffix(domain, ".*", ""))}\.(.+)$/i
else
~r/^(.+\.)?#{Regex.escape(domain)}$/i
end
end
@spec subdomains_regex([String.t()]) :: [Regex.t()]
def subdomains_regex(domains) when is_list(domains) do
Enum.map(domains, &subdomain_regex/1)
end
@spec subdomain_match?([Regex.t()], String.t()) :: boolean()
def subdomain_match?(domains, host) do
Enum.any?(domains, fn domain -> Regex.match?(domain, host) end)
end
@spec instance_list_from_tuples([{String.t(), String.t()}]) :: [String.t()]
def instance_list_from_tuples(list) do
Enum.map(list, fn {instance, _} -> instance end)
end
def describe(policies) do
{:ok, policy_configs} =
policies
|> Enum.reduce({:ok, %{}}, fn
policy, {:ok, data} ->
{:ok, policy_data} = policy.describe()
{:ok, Map.merge(data, policy_data)}
_, error ->
error
end)
mrf_policies =
get_policies()
|> Enum.map(fn policy -> to_string(policy) |> String.split(".") |> List.last() end)
exclusions = Pleroma.Config.get([:mrf, :transparency_exclusions])
base =
%{
mrf_policies: mrf_policies,
exclusions: length(exclusions) > 0
}
|> Map.merge(policy_configs)
{:ok, base}
end
def describe, do: get_policies() |> describe()
def config_descriptions do
Pleroma.Web.ActivityPub.MRF.Policy
|> Pleroma.Docs.Generator.list_behaviour_implementations()
|> config_descriptions()
end
def config_descriptions(policies) do
Enum.reduce(policies, @mrf_config_descriptions, fn policy, acc ->
if function_exported?(policy, :config_description, 0) do
description =
@default_description
|> Map.merge(policy.config_description)
|> Map.put(:group, :pleroma)
|> Map.put(:tab, :mrf)
|> Map.put(:type, :group)
if Enum.all?(@required_description_keys, &Map.has_key?(description, &1)) do
[description | acc]
else
Logger.warning(
"#{policy} config description doesn't have one or all required keys #{inspect(@required_description_keys)}"
)
acc
end
else
Logger.debug(
"#{policy} is excluded from config descriptions, because does not implement `config_description/0` method."
)
acc
end
end)
end
end