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recipients fixes/hardening for CreateGenericValidator

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Haelwenn (lanodan) Monnier 2020-09-10 19:45:42 +02:00
parent c944932674
commit 641184fc7a
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4 changed files with 82 additions and 49 deletions
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13
lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
View file

@ -15,22 +15,27 @@ def cast(object) when is_binary(object) do
def cast(object) when is_map(object) do
case ObjectID.cast(object) do
{:ok, data} -> {:ok, data}
{:ok, data} -> {:ok, [data]}
_ -> :error
end
end
def cast(data) when is_list(data) do
data =
data
|> Enum.reduce_while({:ok, []}, fn element, {:ok, list} ->
|> Enum.reduce_while([], fn element, list ->
case ObjectID.cast(element) do
{:ok, id} ->
{:cont, {:ok, [id | list]}}
{:cont, [id | list]}
_ ->
{:cont, {:ok, list}}
{:cont, list}
end
end)
|> Enum.sort()
|> Enum.uniq()
{:ok, data}
end
def cast(data) do

34
lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
View file

@ -9,37 +9,39 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes do
alias Pleroma.Web.ActivityPub.Transmogrifier
alias Pleroma.Web.ActivityPub.Utils
def cast_recipients(message, field, field_fallback \\ []) do
{:ok, data} = ObjectValidators.Recipients.cast(message[field] || field_fallback)
Map.put(message, field, data)
end
def fix_object_defaults(data) do
%{data: %{"id" => context}, id: context_id} =
Utils.create_context(data["context"] || data["conversation"])
%User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["attributedTo"])
{:ok, to} = ObjectValidators.Recipients.cast(data["to"] || [])
{:ok, cc} = ObjectValidators.Recipients.cast(data["cc"] || [])
data
|> Map.put("context", context)
|> Map.put("context_id", context_id)
|> Map.put("to", to)
|> Map.put("cc", cc)
|> cast_recipients("to")
|> cast_recipients("cc")
|> cast_recipients("bto")
|> cast_recipients("bcc")
|> Transmogrifier.fix_explicit_addressing(follower_collection)
|> Transmogrifier.fix_implicit_addressing(follower_collection)
end
defp fix_activity_recipients(activity, field, object) do
{:ok, data} = ObjectValidators.Recipients.cast(activity[field] || object[field])
Map.put(activity, field, data)
end
def fix_activity_defaults(activity, meta) do
object = meta[:object_data] || %{}
def fix_activity_addressing(activity, _meta) do
%User{follower_address: follower_collection} = User.get_cached_by_ap_id(activity["actor"])
activity
|> fix_activity_recipients("to", object)
|> fix_activity_recipients("cc", object)
|> fix_activity_recipients("bto", object)
|> fix_activity_recipients("bcc", object)
|> cast_recipients("to")
|> cast_recipients("cc")
|> cast_recipients("bto")
|> cast_recipients("bcc")
|> Transmogrifier.fix_explicit_addressing(follower_collection)
|> Transmogrifier.fix_implicit_addressing(follower_collection)
end
def fix_actor(data) do

58
lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
View file

@ -10,8 +10,10 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
alias Pleroma.EctoType.ActivityPub.ObjectValidators
alias Pleroma.Object
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
alias Pleroma.Web.ActivityPub.Transmogrifier
import Ecto.Changeset
@ -23,6 +25,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
field(:type, :string)
field(:to, ObjectValidators.Recipients, default: [])
field(:cc, ObjectValidators.Recipients, default: [])
field(:bto, ObjectValidators.Recipients, default: [])
field(:bcc, ObjectValidators.Recipients, default: [])
field(:object, ObjectValidators.ObjectID)
field(:expires_at, ObjectValidators.DateTime)
@ -54,29 +58,38 @@ def changeset(struct, data) do
|> cast(data, __schema__(:fields))
end
defp fix_context(data, meta) do
if object = meta[:object_data] do
Map.put_new(data, "context", object["context"])
else
# CommonFixes.fix_activity_addressing adapted for Create specific behavior
defp fix_addressing(data, object) do
%User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["actor"])
data
end
|> CommonFixes.cast_recipients("to", object["to"])
|> CommonFixes.cast_recipients("cc", object["cc"])
|> CommonFixes.cast_recipients("bto", object["bto"])
|> CommonFixes.cast_recipients("bcc", object["bcc"])
|> Transmogrifier.fix_explicit_addressing(follower_collection)
|> Transmogrifier.fix_implicit_addressing(follower_collection)
end
defp fix(data, meta) do
def fix(data, meta) do
object = meta[:object_data]
data
|> fix_context(meta)
|> CommonFixes.fix_actor()
|> CommonFixes.fix_activity_defaults(meta)
|> Map.put_new("context", object["context"])
|> fix_addressing(object)
end
defp validate_data(cng, meta) do
object = meta[:object_data]
cng
|> validate_required([:actor, :type, :object])
|> validate_required([:actor, :type, :object, :to, :cc])
|> validate_inclusion(:type, ["Create"])
|> CommonValidations.validate_actor_presence()
|> CommonValidations.validate_any_presence([:to, :cc])
|> validate_actors_match(meta)
|> validate_context_match(meta)
|> validate_actors_match(object)
|> validate_context_match(object)
|> validate_addressing_match(object)
|> validate_object_nonexistence()
|> validate_object_containment()
end
@ -108,8 +121,8 @@ def validate_object_nonexistence(cng) do
end)
end
def validate_actors_match(cng, meta) do
attributed_to = meta[:object_data]["attributedTo"] || meta[:object_data]["actor"]
def validate_actors_match(cng, object) do
attributed_to = object["attributedTo"] || object["actor"]
cng
|> validate_change(:actor, fn :actor, actor ->
@ -121,7 +134,7 @@ def validate_actors_match(cng, meta) do
end)
end
def validate_context_match(cng, %{object_data: %{"context" => object_context}}) do
def validate_context_match(cng, %{"context" => object_context}) do
cng
|> validate_change(:context, fn :context, context ->
if context == object_context do
@ -132,5 +145,18 @@ def validate_context_match(cng, %{object_data: %{"context" => object_context}})
end)
end
def validate_context_match(cng, _), do: cng
def validate_addressing_match(cng, object) do
[:to, :cc, :bcc, :bto]
|> Enum.reduce(cng, fn field, cng ->
object_data = object[to_string(field)]
validate_change(cng, field, fn field, data ->
if data == object_data do
[]
else
[{field, "field doesn't match with object (#{inspect(object_data)})"}]
end
end)
end)
end
end

12
test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
View file

@ -171,8 +171,8 @@ test "it works for incoming notices" do
assert data["to"] == ["https://www.w3.org/ns/activitystreams#Public"]
assert data["cc"] == [
"http://mastodon.example.org/users/admin/followers",
"http://localtesting.pleroma.lol/users/lain"
"http://localtesting.pleroma.lol/users/lain",
"http://mastodon.example.org/users/admin/followers"
]
assert data["actor"] == "http://mastodon.example.org/users/admin"
@ -185,8 +185,8 @@ test "it works for incoming notices" do
assert object_data["to"] == ["https://www.w3.org/ns/activitystreams#Public"]
assert object_data["cc"] == [
"http://mastodon.example.org/users/admin/followers",
"http://localtesting.pleroma.lol/users/lain"
"http://localtesting.pleroma.lol/users/lain",
"http://mastodon.example.org/users/admin/followers"
]
assert object_data["actor"] == "http://mastodon.example.org/users/admin"
@ -350,8 +350,8 @@ test "it correctly processes messages with non-array to field" do
assert {:ok, activity} = Transmogrifier.handle_incoming(data)
assert [
"http://mastodon.example.org/users/admin/followers",
"http://localtesting.pleroma.lol/users/lain"
"http://localtesting.pleroma.lol/users/lain",
"http://mastodon.example.org/users/admin/followers"
] == activity.data["cc"]
assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["to"]