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Fix regex usage in MRF (#254)

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fixes #235
fixes #228

Co-authored-by: FloatingGhost <hannah@coffee-and-dreams.uk>
Reviewed-on: AkkomaGang/akkoma#254
This commit is contained in:
floatingghost 2022-11-06 23:50:32 +00:00
parent 5123b3a5dd
commit 31ad09010e
5 changed files with 72 additions and 56 deletions
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4
CHANGELOG.md
View file

@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
## Unreleased
## UPGRADE NOTES
- Change your instance blocks to remove any `*.` prefixes. `example.com` will block `*.example.com` by default now
## Added
- Officially supported docker release
- Ability to remove followers unilaterally without a block
@ -14,6 +17,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
## Changes
- Follows no longer override domain blocks, a domain block is final
- Deletes are now the lowest priority to publish and will be handled after creates
- Domain blocks are now subdomain-matches by default
## Fixed
- Registrations via ldap are now compatible with the latest OTP24

11
lib/pleroma/web/activity_pub/mrf.ex
View file

@ -149,9 +149,18 @@ 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/
def subdomain_regex(domain) do
~r/^(.+\.)?#{Regex.escape(domain)}$/i
end
@spec subdomains_regex([String.t()]) :: [Regex.t()]
def subdomains_regex(domains) when is_list(domains) do
for domain <- domains, do: ~r(^#{String.replace(domain, "*.", "(.*\\.)*")}$)i
Enum.map(domains, &subdomain_regex/1)
end
@spec subdomain_match?([Regex.t()], String.t()) :: boolean()

9
test/pleroma/user_test.exs
View file

@ -444,7 +444,9 @@ test "it sends a welcome message if it is set" do
end
setup do:
clear_config(:mrf_simple,
clear_config(
[:mrf_simple],
%{
media_removal: [],
media_nsfw: [],
federated_timeline_removal: [],
@ -455,6 +457,7 @@ test "it sends a welcome message if it is set" do
avatar_removal: [],
banner_removal: [],
reject_deletes: []
}
)
setup do:
@ -1324,7 +1327,7 @@ test "does not block domain with same end if wildcard added" do
collateral_user =
insert(:user, %{ap_id: "https://another-awful-and-rude-instance.com/user/bully"})
{:ok, user} = User.block_domain(user, "*.awful-and-rude-instance.com")
{:ok, user} = User.block_domain(user, "awful-and-rude-instance.com")
refute User.blocks?(user, collateral_user)
end
@ -1342,7 +1345,7 @@ test "blocks domain with wildcard for subdomain" do
user_domain = insert(:user, %{ap_id: "https://awful-and-rude-instance.com/user/bully"})
{:ok, user} = User.block_domain(user, "*.awful-and-rude-instance.com")
{:ok, user} = User.block_domain(user, "awful-and-rude-instance.com")
assert User.blocks?(user, user_from_subdomain)
assert User.blocks?(user, user_with_two_subdomains)

68
test/pleroma/web/activity_pub/mrf/simple_policy_test.exs
View file

@ -46,8 +46,8 @@ test "has a matching host" do
end
test "match with wildcard domain" do
clear_config([:mrf_simple, :media_removal], [{"*.remote.instance", "Whatever reason"}])
media_message = build_media_message()
clear_config([:mrf_simple, :media_removal], [{"remote.instance", "Whatever reason"}])
media_message = build_media_message("sub.remote.instance")
local_message = build_local_message()
assert SimplePolicy.filter(media_message) ==
@ -81,8 +81,8 @@ test "has a matching host" do
end
test "match with wildcard domain" do
clear_config([:mrf_simple, :media_nsfw], [{"*.remote.instance", "yeah yeah"}])
media_message = build_media_message()
clear_config([:mrf_simple, :media_nsfw], [{"remote.instance", "yeah yeah"}])
media_message = build_media_message("sub.remote.instance")
local_message = build_local_message()
assert SimplePolicy.filter(media_message) ==
@ -92,9 +92,9 @@ test "match with wildcard domain" do
end
end
defp build_media_message do
defp build_media_message(domain \\ "remote.instance") do
%{
"actor" => "https://remote.instance/users/bob",
"actor" => "https://#{domain}/users/bob",
"type" => "Create",
"object" => %{
"attachment" => [%{}],
@ -124,8 +124,8 @@ test "has a matching host" do
end
test "match with wildcard domain" do
clear_config([:mrf_simple, :report_removal], [{"*.remote.instance", "suya"}])
report_message = build_report_message()
clear_config([:mrf_simple, :report_removal], [{"remote.instance", "suya"}])
report_message = build_report_message("sub.remote.instance")
local_message = build_local_message()
assert {:reject, _} = SimplePolicy.filter(report_message)
@ -133,9 +133,9 @@ test "match with wildcard domain" do
end
end
defp build_report_message do
defp build_report_message(domain \\ "remote.instance") do
%{
"actor" => "https://remote.instance/users/bob",
"actor" => "https://#{domain}/users/bob",
"type" => "Flag"
}
end
@ -143,7 +143,7 @@ defp build_report_message do
describe "when :federated_timeline_removal" do
test "is empty" do
clear_config([:mrf_simple, :federated_timeline_removal], [])
{_, ftl_message} = build_ftl_actor_and_message()
{_, ftl_message} = build_ftl_actor_and_message("https://remote.instance/users/bob")
local_message = build_local_message()
assert SimplePolicy.filter(ftl_message) == {:ok, ftl_message}
@ -151,7 +151,7 @@ test "is empty" do
end
test "has a matching host" do
{actor, ftl_message} = build_ftl_actor_and_message()
{actor, ftl_message} = build_ftl_actor_and_message("https://remote.instance/users/bob")
ftl_message_actor_host =
ftl_message
@ -172,7 +172,7 @@ test "has a matching host" do
end
test "match with wildcard domain" do
{actor, ftl_message} = build_ftl_actor_and_message()
{actor, ftl_message} = build_ftl_actor_and_message("https://sub.remote.instance/users/bob")
ftl_message_actor_host =
ftl_message
@ -181,7 +181,7 @@ test "match with wildcard domain" do
|> Map.fetch!(:host)
clear_config([:mrf_simple, :federated_timeline_removal], [
{"*." <> ftl_message_actor_host, "owo"}
{ftl_message_actor_host, "owo"}
])
local_message = build_local_message()
@ -196,7 +196,7 @@ test "match with wildcard domain" do
end
test "has a matching host but only as:Public in to" do
{_actor, ftl_message} = build_ftl_actor_and_message()
{_actor, ftl_message} = build_ftl_actor_and_message("https://remote.instance/users/bob")
ftl_message_actor_host =
ftl_message
@ -253,8 +253,8 @@ test "obfuscates domains listed in :transparency_obfuscate_domains" do
end
end
defp build_ftl_actor_and_message do
actor = insert(:user)
defp build_ftl_actor_and_message(ap_id) do
actor = insert(:user, ap_id: ap_id)
{actor,
%{
@ -282,9 +282,9 @@ test "activity has a matching host" do
end
test "activity matches with wildcard domain" do
clear_config([:mrf_simple, :reject], [{"*.remote.instance", ""}])
clear_config([:mrf_simple, :reject], [{"remote.instance", ""}])
remote_message = build_remote_message()
remote_message = build_remote_message("sub.remote.instance")
assert {:reject, _} = SimplePolicy.filter(remote_message)
end
@ -325,7 +325,7 @@ test "reject by URI object" do
describe "when :followers_only" do
test "is empty" do
clear_config([:mrf_simple, :followers_only], [])
{_, ftl_message} = build_ftl_actor_and_message()
{_, ftl_message} = build_ftl_actor_and_message("https://remote.instance/users/alice")
local_message = build_local_message()
assert SimplePolicy.filter(ftl_message) == {:ok, ftl_message}
@ -412,10 +412,10 @@ test "activity has a matching host" do
end
test "activity matches with wildcard domain" do
clear_config([:mrf_simple, :accept], [{"*.remote.instance", ""}])
clear_config([:mrf_simple, :accept], [{"remote.instance", ""}])
local_message = build_local_message()
remote_message = build_remote_message()
remote_message = build_remote_message("sub.remote.instance")
assert SimplePolicy.filter(local_message) == {:ok, local_message}
assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
@ -457,9 +457,9 @@ test "has a matching host" do
end
test "match with wildcard domain" do
clear_config([:mrf_simple, :avatar_removal], [{"*.remote.instance", ""}])
clear_config([:mrf_simple, :avatar_removal], [{"remote.instance", ""}])
remote_user = build_remote_user()
remote_user = build_remote_user("sub.remote.instance")
{:ok, filtered} = SimplePolicy.filter(remote_user)
refute filtered["icon"]
@ -493,9 +493,9 @@ test "has a matching host" do
end
test "match with wildcard domain" do
clear_config([:mrf_simple, :banner_removal], [{"*.remote.instance", ""}])
clear_config([:mrf_simple, :banner_removal], [{"remote.instance", ""}])
remote_user = build_remote_user()
remote_user = build_remote_user("sub.remote.instance")
{:ok, filtered} = SimplePolicy.filter(remote_user)
refute filtered["image"]
@ -553,10 +553,10 @@ test "it rejects the deletion" do
end
describe "when :reject_deletes match with wildcard domain" do
setup do: clear_config([:mrf_simple, :reject_deletes], [{"*.remote.instance", ""}])
setup do: clear_config([:mrf_simple, :reject_deletes], [{"remote.instance", ""}])
test "it rejects the deletion" do
deletion_message = build_remote_deletion_message()
deletion_message = build_remote_deletion_message("sub.remote.instance")
assert {:reject, _} = SimplePolicy.filter(deletion_message)
end
@ -570,13 +570,13 @@ defp build_local_message do
}
end
defp build_remote_message do
%{"actor" => "https://remote.instance/users/bob"}
defp build_remote_message(domain \\ "remote.instance") do
%{"actor" => "https://#{domain}/users/bob"}
end
defp build_remote_user do
defp build_remote_user(domain \\ "remote.instance") do
%{
"id" => "https://remote.instance/users/bob",
"id" => "https://#{domain}/users/bob",
"icon" => %{
"url" => "http://example.com/image.jpg",
"type" => "Image"
@ -589,10 +589,10 @@ defp build_remote_user do
}
end
defp build_remote_deletion_message do
defp build_remote_deletion_message(domain \\ "remote.instance") do
%{
"type" => "Delete",
"actor" => "https://remote.instance/users/bob"
"actor" => "https://#{domain}/users/bob"
}
end
end

16
test/pleroma/web/activity_pub/mrf_test.exs
View file

@ -9,8 +9,8 @@ defmodule Pleroma.Web.ActivityPub.MRFTest do
test "subdomains_regex/1" do
assert MRF.subdomains_regex(["unsafe.tld", "*.unsafe.tld"]) == [
~r/^unsafe.tld$/i,
~r/^(.*\.)*unsafe.tld$/i
~r/^(.+\.)?unsafe\.tld$/i,
~r/^(.+\.)?\*\.unsafe\.tld$/i
]
end
@ -18,7 +18,7 @@ test "subdomains_regex/1" do
test "common domains" do
regexes = MRF.subdomains_regex(["unsafe.tld", "unsafe2.tld"])
assert regexes == [~r/^unsafe.tld$/i, ~r/^unsafe2.tld$/i]
assert regexes == [~r/^(.+\.)?unsafe\.tld$/i, ~r/^(.+\.)?unsafe2\.tld$/i]
assert MRF.subdomain_match?(regexes, "unsafe.tld")
assert MRF.subdomain_match?(regexes, "unsafe2.tld")
@ -27,9 +27,9 @@ test "common domains" do
end
test "wildcard domains with one subdomain" do
regexes = MRF.subdomains_regex(["*.unsafe.tld"])
regexes = MRF.subdomains_regex(["unsafe.tld"])
assert regexes == [~r/^(.*\.)*unsafe.tld$/i]
assert regexes == [~r/^(.+\.)?unsafe\.tld$/i]
assert MRF.subdomain_match?(regexes, "unsafe.tld")
assert MRF.subdomain_match?(regexes, "sub.unsafe.tld")
@ -38,9 +38,9 @@ test "wildcard domains with one subdomain" do
end
test "wildcard domains with two subdomains" do
regexes = MRF.subdomains_regex(["*.unsafe.tld"])
regexes = MRF.subdomains_regex(["unsafe.tld"])
assert regexes == [~r/^(.*\.)*unsafe.tld$/i]
assert regexes == [~r/^(.+\.)?unsafe\.tld$/i]
assert MRF.subdomain_match?(regexes, "unsafe.tld")
assert MRF.subdomain_match?(regexes, "sub.sub.unsafe.tld")
@ -51,7 +51,7 @@ test "wildcard domains with two subdomains" do
test "matches are case-insensitive" do
regexes = MRF.subdomains_regex(["UnSafe.TLD", "UnSAFE2.Tld"])
assert regexes == [~r/^UnSafe.TLD$/i, ~r/^UnSAFE2.Tld$/i]
assert regexes == [~r/^(.+\.)?UnSafe\.TLD$/i, ~r/^(.+\.)?UnSAFE2\.Tld$/i]
assert MRF.subdomain_match?(regexes, "UNSAFE.TLD")
assert MRF.subdomain_match?(regexes, "UNSAFE2.TLD")