Merge branch 'fix/gts-federation' into 'develop'

GoToSocial federation fixes

See merge request pleroma/pleroma!3725
This commit is contained in:
tusooa 2022-09-05 01:10:34 +00:00
commit f8afba95b2
5 changed files with 82 additions and 17 deletions

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@ -10,17 +10,14 @@ defmodule Pleroma.Signature do
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
@known_suffixes ["/publickey", "/main-key"]
def key_id_to_actor_id(key_id) do
uri =
URI.parse(key_id)
key_id
|> URI.parse()
|> Map.put(:fragment, nil)
uri =
if not is_nil(uri.path) and String.ends_with?(uri.path, "/publickey") do
Map.put(uri, :path, String.replace(uri.path, "/publickey", ""))
else
uri
end
|> remove_suffix(@known_suffixes)
maybe_ap_id = URI.to_string(uri)
@ -36,6 +33,16 @@ defmodule Pleroma.Signature do
end
end
defp remove_suffix(uri, [test | rest]) do
if not is_nil(uri.path) and String.ends_with?(uri.path, test) do
Map.put(uri, :path, String.replace(uri.path, test, ""))
else
remove_suffix(uri, rest)
end
end
defp remove_suffix(uri, []), do: uri
def fetch_public_key(conn) do
with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
{:ok, actor_id} <- key_id_to_actor_id(kid),

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@ -63,7 +63,10 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidator do
defp fix_replies(%{"replies" => %{"items" => replies}} = data) when is_list(replies),
do: Map.put(data, "replies", replies)
defp fix_replies(%{"replies" => replies} = data) when is_bitstring(replies),
# TODO: Pleroma does not have any support for Collections at the moment.
# If the `replies` field is not something the ObjectID validator can handle,
# the activity/object would be rejected, which is bad behavior.
defp fix_replies(%{"replies" => replies} = data) when not is_list(replies),
do: Map.drop(data, ["replies"])
defp fix_replies(data), do: data

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@ -25,21 +25,58 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do
end
end
defp validate_signature(conn, request_target) do
# Newer drafts for HTTP signatures now use @request-target instead of the
# old (request-target). We'll now support both for incoming signatures.
conn =
conn
|> put_req_header("(request-target)", request_target)
|> put_req_header("@request-target", request_target)
HTTPSignatures.validate_conn(conn)
end
defp validate_signature(conn) do
# This (request-target) is non-standard, but many implementations do it
# this way due to a misinterpretation of
# https://datatracker.ietf.org/doc/html/draft-cavage-http-signatures-06
# "path" was interpreted as not having the query, though later examples
# show that it must be the absolute path + query. This behavior is kept to
# make sure most software (Pleroma itself, Mastodon, and probably others)
# do not break.
request_target = String.downcase("#{conn.method}") <> " #{conn.request_path}"
# This is the proper way to build the @request-target, as expected by
# many HTTP signature libraries, clarified in the following draft:
# https://www.ietf.org/archive/id/draft-ietf-httpbis-message-signatures-11.html#section-2.2.6
# It is the same as before, but containing the query part as well.
proper_target = request_target <> "?#{conn.query_string}"
cond do
# Normal, non-standard behavior but expected by Pleroma and more.
validate_signature(conn, request_target) ->
true
# Has query string and the previous one failed: let's try the standard.
conn.query_string != "" ->
validate_signature(conn, proper_target)
# If there's no query string and signature fails, it's rotten.
true ->
false
end
end
defp maybe_assign_valid_signature(conn) do
if has_signature_header?(conn) do
# set (request-target) header to the appropriate value
# we also replace the digest header with the one we computed
request_target = String.downcase("#{conn.method}") <> " #{conn.request_path}"
# we replace the digest header with the one we computed in DigestPlug
conn =
conn
|> put_req_header("(request-target)", request_target)
|> case do
case conn do
%{assigns: %{digest: digest}} = conn -> put_req_header(conn, "digest", digest)
conn -> conn
end
assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
assign(conn, :valid_signature, validate_signature(conn))
else
Logger.debug("No signature header!")
conn

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@ -109,6 +109,11 @@ defmodule Pleroma.SignatureTest do
{:ok, "https://example.com/users/1234"}
end
test "it deduces the actor id for gotoSocial" do
assert Signature.key_id_to_actor_id("https://example.com/users/1234/main-key") ==
{:ok, "https://example.com/users/1234"}
end
test "it calls webfinger for 'acct:' accounts" do
with_mock(Pleroma.Web.WebFinger,
finger: fn _ -> %{"ap_id" => "https://gensokyo.2hu/users/raymoo"} end

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@ -103,4 +103,17 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidatorTest
%{valid?: true} = ArticleNotePageValidator.cast_and_validate(note)
end
test "a Note without replies/first/items validates" do
insert(:user, ap_id: "https://mastodon.social/users/emelie")
note =
"test/fixtures/tesla_mock/status.emelie.json"
|> File.read!()
|> Jason.decode!()
|> pop_in(["replies", "first", "items"])
|> elem(1)
%{valid?: true} = ArticleNotePageValidator.cast_and_validate(note)
end
end