diff options
Diffstat (limited to 'lib/pleroma/web/activity_pub/object_validators')
24 files changed, 2104 insertions, 0 deletions
diff --git a/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex b/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex new file mode 100644 index 0000000..d611da0 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex @@ -0,0 +1,56 @@ +# 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.ObjectValidators.AcceptRejectValidator do + use Ecto.Schema + + alias Pleroma.Activity + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + end + + def cast_data(data) do + %__MODULE__{} + |> cast(data, __schema__(:fields)) + end + + defp validate_data(cng) do + cng + |> validate_required([:id, :type, :actor, :to, :cc, :object]) + |> validate_inclusion(:type, ["Accept", "Reject"]) + |> validate_actor_presence() + |> validate_object_presence(allowed_types: ["Follow"]) + |> validate_accept_reject_rights() + end + + def cast_and_validate(data) do + data + |> cast_data + |> validate_data + end + + def validate_accept_reject_rights(cng) do + with object_id when is_binary(object_id) <- get_field(cng, :object), + %Activity{data: %{"object" => followed_actor}} <- Activity.get_by_ap_id(object_id), + true <- followed_actor == get_field(cng, :actor) do + cng + else + _e -> + cng + |> add_error(:actor, "can't accept or reject the given activity") + end + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/add_remove_validator.ex b/lib/pleroma/web/activity_pub/object_validators/add_remove_validator.ex new file mode 100644 index 0000000..5202db7 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/add_remove_validator.ex @@ -0,0 +1,78 @@ +# 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.ObjectValidators.AddRemoveValidator do + use Ecto.Schema + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + require Pleroma.Constants + + alias Pleroma.User + + @primary_key false + + embedded_schema do + field(:target) + + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + end + + def cast_and_validate(data) do + {:ok, actor} = User.get_or_fetch_by_ap_id(data["actor"]) + + {:ok, actor} = maybe_refetch_user(actor) + + data + |> maybe_fix_data_for_mastodon(actor) + |> cast_data() + |> validate_data(actor) + end + + defp maybe_fix_data_for_mastodon(data, actor) do + # Mastodon sends pin/unpin objects without id, to, cc fields + data + |> Map.put_new("id", Pleroma.Web.ActivityPub.Utils.generate_activity_id()) + |> Map.put_new("to", [Pleroma.Constants.as_public()]) + |> Map.put_new("cc", [actor.follower_address]) + end + + defp cast_data(data) do + cast(%__MODULE__{}, data, __schema__(:fields)) + end + + defp validate_data(changeset, actor) do + changeset + |> validate_required([:id, :target, :object, :actor, :type, :to, :cc]) + |> validate_inclusion(:type, ~w(Add Remove)) + |> validate_actor_presence() + |> validate_collection_belongs_to_actor(actor) + |> validate_object_presence() + end + + defp validate_collection_belongs_to_actor(changeset, actor) do + validate_change(changeset, :target, fn :target, target -> + if target == actor.featured_address do + [] + else + [target: "collection doesn't belong to actor"] + end + end) + end + + defp maybe_refetch_user(%User{featured_address: address} = user) when is_binary(address) do + {:ok, user} + end + + defp maybe_refetch_user(%User{ap_id: ap_id}) do + Pleroma.Web.ActivityPub.Transmogrifier.upgrade_user_from_ap_id(ap_id) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex b/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex new file mode 100644 index 0000000..c2c7ba1 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex @@ -0,0 +1,123 @@ +# 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.ObjectValidators.AnnounceValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.Object + alias Pleroma.User + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.Utils + alias Pleroma.Web.ActivityPub.Visibility + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + require Pleroma.Constants + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + + field(:context, :string) + field(:published, ObjectValidators.DateTime) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + data = + data + |> fix() + + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, data) do + struct + |> cast(data, __schema__(:fields)) + end + + defp fix(data) do + data = + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_activity_addressing() + + with %Object{} = object <- Object.normalize(data["object"]) do + data + |> CommonFixes.fix_activity_context(object) + |> CommonFixes.fix_object_action_recipients(object) + else + _ -> data + end + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Announce"]) + |> validate_required([:id, :type, :object, :actor, :to, :cc]) + |> validate_actor_presence() + |> validate_object_presence() + |> validate_existing_announce() + |> validate_announcable() + end + + defp validate_announcable(cng) do + with actor when is_binary(actor) <- get_field(cng, :actor), + object when is_binary(object) <- get_field(cng, :object), + %User{} = actor <- User.get_cached_by_ap_id(actor), + %Object{} = object <- Object.get_cached_by_ap_id(object), + false <- Visibility.is_public?(object) do + same_actor = object.data["actor"] == actor.ap_id + recipients = get_field(cng, :to) ++ get_field(cng, :cc) + local_public = Utils.as_local_public() + + is_public = + Enum.member?(recipients, Pleroma.Constants.as_public()) or + Enum.member?(recipients, local_public) + + cond do + same_actor && is_public -> + cng + |> add_error(:actor, "can not announce this object publicly") + + !same_actor -> + cng + |> add_error(:actor, "can not announce this object") + + true -> + cng + end + else + _ -> cng + end + end + + defp validate_existing_announce(cng) do + actor = get_field(cng, :actor) + object = get_field(cng, :object) + + if actor && object && Utils.get_existing_announce(actor, %{data: %{"id" => object}}) do + cng + |> add_error(:actor, "already announced this object") + |> add_error(:object, "already announced by this actor") + else + cng + end + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex b/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex new file mode 100644 index 0000000..2d9b8ba --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex @@ -0,0 +1,70 @@ +# 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.ObjectValidators.AnswerValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + import Ecto.Changeset + + @primary_key false + @derive Jason.Encoder + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + end + end + + field(:name, :string) + field(:inReplyTo, ObjectValidators.ObjectID) + field(:attributedTo, ObjectValidators.ObjectID) + field(:context, :string) + + # TODO: Remove actor on objects + field(:actor, ObjectValidators.ObjectID) + end + + def cast_and_apply(data) do + data + |> cast_data() + |> apply_action(:insert) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, data) do + data = + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_object_defaults() + + struct + |> cast(data, __schema__(:fields)) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Answer"]) + |> validate_required([:id, :inReplyTo, :name, :attributedTo, :actor]) + |> CommonValidations.validate_any_presence([:cc, :to]) + |> CommonValidations.validate_fields_match([:actor, :attributedTo]) + |> CommonValidations.validate_actor_presence() + |> CommonValidations.validate_host_match() + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex b/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex new file mode 100644 index 0000000..2670e3f --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex @@ -0,0 +1,109 @@ +# 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.ObjectValidators.ArticleNotePageValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + alias Pleroma.Web.ActivityPub.Transmogrifier + + import Ecto.Changeset + + @primary_key false + @derive Jason.Encoder + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + object_fields() + status_object_fields() + end + end + + field(:replies, {:array, ObjectValidators.ObjectID}, default: []) + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + defp fix_url(%{"url" => url} = data) when is_bitstring(url), do: data + defp fix_url(%{"url" => url} = data) when is_map(url), do: Map.put(data, "url", url["href"]) + defp fix_url(data), do: data + + defp fix_tag(%{"tag" => tag} = data) when is_list(tag) do + Map.put(data, "tag", Enum.filter(tag, &is_map/1)) + end + + defp fix_tag(%{"tag" => tag} = data) when is_map(tag), do: Map.put(data, "tag", [tag]) + defp fix_tag(data), do: Map.drop(data, ["tag"]) + + defp fix_replies(%{"replies" => %{"first" => %{"items" => replies}}} = data) + when is_list(replies), + do: Map.put(data, "replies", replies) + + defp fix_replies(%{"replies" => %{"items" => replies}} = data) when is_list(replies), + do: Map.put(data, "replies", 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 + + def fix_attachments(%{"attachment" => attachment} = data) when is_map(attachment), + do: Map.put(data, "attachment", [attachment]) + + def fix_attachments(data), do: data + + defp fix(data) do + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_object_defaults() + |> fix_url() + |> fix_tag() + |> fix_replies() + |> fix_attachments() + |> Transmogrifier.fix_emoji() + |> Transmogrifier.fix_content_map() + end + + def changeset(struct, data) do + data = fix(data) + + struct + |> cast(data, __schema__(:fields) -- [:attachment, :tag]) + |> cast_embed(:attachment) + |> cast_embed(:tag) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Article", "Note", "Page"]) + |> validate_required([:id, :actor, :attributedTo, :type, :context]) + |> CommonValidations.validate_any_presence([:cc, :to]) + |> CommonValidations.validate_fields_match([:actor, :attributedTo]) + |> CommonValidations.validate_actor_presence() + |> CommonValidations.validate_host_match() + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex new file mode 100644 index 0000000..398020b --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex @@ -0,0 +1,96 @@ +# 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.ObjectValidators.AttachmentValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + + import Ecto.Changeset + + @primary_key false + embedded_schema do + field(:id, :string) + field(:type, :string) + field(:mediaType, ObjectValidators.MIME, default: "application/octet-stream") + field(:name, :string) + field(:blurhash, :string) + + embeds_many :url, UrlObjectValidator, primary_key: false do + field(:type, :string) + field(:href, ObjectValidators.Uri) + field(:mediaType, ObjectValidators.MIME, default: "application/octet-stream") + field(:width, :integer) + field(:height, :integer) + end + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, data) do + data = + data + |> fix_media_type() + |> fix_url() + + struct + |> cast(data, [:id, :type, :mediaType, :name, :blurhash]) + |> cast_embed(:url, with: &url_changeset/2, required: true) + |> validate_inclusion(:type, ~w[Link Document Audio Image Video]) + |> validate_required([:type, :mediaType]) + end + + def url_changeset(struct, data) do + data = fix_media_type(data) + + struct + |> cast(data, [:type, :href, :mediaType, :width, :height]) + |> validate_inclusion(:type, ["Link"]) + |> validate_required([:type, :href, :mediaType]) + end + + def fix_media_type(data) do + Map.put_new(data, "mediaType", data["mimeType"] || "application/octet-stream") + end + + defp handle_href(href, mediaType, data) do + [ + %{ + "href" => href, + "type" => "Link", + "mediaType" => mediaType, + "width" => data["width"], + "height" => data["height"] + } + ] + end + + defp fix_url(data) do + cond do + is_binary(data["url"]) -> + Map.put(data, "url", handle_href(data["url"], data["mediaType"], data)) + + is_binary(data["href"]) and data["url"] == nil -> + Map.put(data, "url", handle_href(data["href"], data["mediaType"], data)) + + true -> + data + end + end + + defp validate_data(cng) do + cng + |> validate_inclusion(:type, ~w[Document Audio Image Video]) + |> validate_required([:mediaType, :type]) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex new file mode 100644 index 0000000..671a7ef --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex @@ -0,0 +1,120 @@ +# 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.ObjectValidators.AudioVideoValidator do + use Ecto.Schema + + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + alias Pleroma.Web.ActivityPub.Transmogrifier + + import Ecto.Changeset + + @primary_key false + @derive Jason.Encoder + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + object_fields() + status_object_fields() + end + end + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + defp find_attachment(url) do + mpeg_url = + Enum.find(url, fn + %{"mediaType" => mime_type, "tag" => tags} when is_list(tags) -> + mime_type == "application/x-mpegURL" + + _ -> + false + end) + + url + |> Enum.concat(mpeg_url["tag"] || []) + |> Enum.find(fn + %{"mediaType" => mime_type} -> String.starts_with?(mime_type, ["video/", "audio/"]) + %{"mimeType" => mime_type} -> String.starts_with?(mime_type, ["video/", "audio/"]) + _ -> false + end) + end + + defp fix_url(%{"url" => url} = data) when is_list(url) do + attachment = find_attachment(url) + + link_element = + Enum.find(url, fn + %{"mediaType" => "text/html"} -> true + %{"mimeType" => "text/html"} -> true + _ -> false + end) + + data + |> Map.put("attachment", [attachment]) + |> Map.put("url", link_element["href"]) + end + + defp fix_url(data), do: data + + defp fix_content(%{"mediaType" => "text/markdown", "content" => content} = data) + when is_binary(content) do + content = + content + |> Pleroma.Formatter.markdown_to_html() + |> Pleroma.HTML.filter_tags() + + Map.put(data, "content", content) + end + + defp fix_content(data), do: data + + defp fix(data) do + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_object_defaults() + |> Transmogrifier.fix_emoji() + |> fix_url() + |> fix_content() + end + + def changeset(struct, data) do + data = fix(data) + + struct + |> cast(data, __schema__(:fields) -- [:attachment, :tag]) + |> cast_embed(:attachment, required: true) + |> cast_embed(:tag) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Audio", "Video"]) + |> validate_required([:id, :actor, :attributedTo, :type, :context]) + |> CommonValidations.validate_any_presence([:cc, :to]) + |> CommonValidations.validate_fields_match([:actor, :attributedTo]) + |> CommonValidations.validate_actor_presence() + |> CommonValidations.validate_host_match() + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/block_validator.ex b/lib/pleroma/web/activity_pub/object_validators/block_validator.ex new file mode 100644 index 0000000..0de87a2 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/block_validator.ex @@ -0,0 +1,43 @@ +# 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.ObjectValidators.BlockValidator do + use Ecto.Schema + + alias Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + import Ecto.Changeset + + @primary_key false + @derive Jason.Encoder + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + end + + def cast_data(data) do + %__MODULE__{} + |> cast(data, __schema__(:fields)) + end + + defp validate_data(cng) do + cng + |> validate_required([:id, :type, :actor, :to, :cc, :object]) + |> validate_inclusion(:type, ["Block"]) + |> CommonValidations.validate_actor_presence() + |> CommonValidations.validate_actor_presence(field_name: :object) + end + + def cast_and_validate(data) do + data + |> cast_data + |> validate_data + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex b/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex new file mode 100644 index 0000000..efae48c --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex @@ -0,0 +1,129 @@ +# 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.ObjectValidators.ChatMessageValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.User + alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.Transmogrifier, only: [fix_emoji: 1] + + @primary_key false + @derive Jason.Encoder + + embedded_schema do + field(:id, ObjectValidators.ObjectID, primary_key: true) + field(:to, ObjectValidators.Recipients, default: []) + field(:type, :string) + field(:content, ObjectValidators.SafeText) + field(:actor, ObjectValidators.ObjectID) + field(:published, ObjectValidators.DateTime) + field(:emoji, ObjectValidators.Emoji, default: %{}) + + embeds_one(:attachment, AttachmentValidator) + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + def fix(data) do + data + |> fix_emoji() + |> fix_attachment() + |> Map.put_new("actor", data["attributedTo"]) + end + + # Throws everything but the first one away + def fix_attachment(%{"attachment" => [attachment | _]} = data) do + data + |> Map.put("attachment", attachment) + end + + def fix_attachment(data), do: data + + def changeset(struct, data) do + data = fix(data) + + struct + |> cast(data, List.delete(__schema__(:fields), :attachment)) + |> cast_embed(:attachment) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["ChatMessage"]) + |> validate_required([:id, :actor, :to, :type, :published]) + |> validate_content_or_attachment() + |> validate_length(:to, is: 1) + |> validate_length(:content, max: Pleroma.Config.get([:instance, :remote_limit])) + |> validate_local_concern() + end + + def validate_content_or_attachment(cng) do + attachment = get_field(cng, :attachment) + + if attachment do + cng + else + cng + |> validate_required([:content]) + end + end + + @doc """ + Validates the following + - If both users are in our system + - If at least one of the users in this ChatMessage is a local user + - If the recipient is not blocking the actor + - If the recipient is explicitly not accepting chat messages + """ + def validate_local_concern(cng) do + with actor_ap <- get_field(cng, :actor), + {_, %User{} = actor} <- {:find_actor, User.get_cached_by_ap_id(actor_ap)}, + {_, %User{} = recipient} <- + {:find_recipient, User.get_cached_by_ap_id(get_field(cng, :to) |> hd())}, + {_, false} <- {:not_accepting_chats?, recipient.accepts_chat_messages == false}, + {_, false} <- {:blocking_actor?, User.blocks?(recipient, actor)}, + {_, true} <- {:local?, Enum.any?([actor, recipient], & &1.local)} do + cng + else + {:blocking_actor?, true} -> + cng + |> add_error(:actor, "actor is blocked by recipient") + + {:not_accepting_chats?, true} -> + cng + |> add_error(:to, "recipient does not accept chat messages") + + {:local?, false} -> + cng + |> add_error(:actor, "actor and recipient are both remote") + + {:find_actor, _} -> + cng + |> add_error(:actor, "can't find user") + + {:find_recipient, _} -> + cng + |> add_error(:to, "can't find user") + end + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fields.ex b/lib/pleroma/web/activity_pub/object_validators/common_fields.ex new file mode 100644 index 0000000..7b60c13 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/common_fields.ex @@ -0,0 +1,67 @@ +# 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.ObjectValidators.CommonFields do + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator + alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator + + # Activities and Objects, except (Create)ChatMessage + defmacro message_fields do + quote bind_quoted: binding() do + field(:type, :string) + field(:id, ObjectValidators.ObjectID, primary_key: true) + + field(:to, ObjectValidators.Recipients, default: []) + field(:cc, ObjectValidators.Recipients, default: []) + field(:bto, ObjectValidators.Recipients, default: []) + field(:bcc, ObjectValidators.Recipients, default: []) + end + end + + defmacro activity_fields do + quote bind_quoted: binding() do + field(:object, ObjectValidators.ObjectID) + field(:actor, ObjectValidators.ObjectID) + end + end + + # All objects except Answer and CHatMessage + defmacro object_fields do + quote bind_quoted: binding() do + field(:content, :string) + + field(:published, ObjectValidators.DateTime) + field(:updated, ObjectValidators.DateTime) + field(:emoji, ObjectValidators.Emoji, default: %{}) + embeds_many(:attachment, AttachmentValidator) + end + end + + # Basically objects that aren't ChatMessage and Answer + defmacro status_object_fields do + quote bind_quoted: binding() do + # TODO: Remove actor on objects + field(:actor, ObjectValidators.ObjectID) + field(:attributedTo, ObjectValidators.ObjectID) + + embeds_many(:tag, TagValidator) + + field(:name, :string) + field(:summary, :string) + + field(:context, :string) + + field(:sensitive, :boolean, default: false) + field(:replies_count, :integer, default: 0) + field(:like_count, :integer, default: 0) + field(:announcement_count, :integer, default: 0) + field(:inReplyTo, ObjectValidators.ObjectID) + field(:url, ObjectValidators.Uri) + + field(:likes, {:array, ObjectValidators.ObjectID}, default: []) + field(:announcements, {:array, ObjectValidators.ObjectID}, default: []) + end + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex new file mode 100644 index 0000000..add46d5 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex @@ -0,0 +1,79 @@ +# 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.ObjectValidators.CommonFixes do + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.Object + alias Pleroma.Object.Containment + alias Pleroma.User + alias Pleroma.Web.ActivityPub.Transmogrifier + alias Pleroma.Web.ActivityPub.Utils + + def cast_and_filter_recipients(message, field, follower_collection, field_fallback \\ []) do + {:ok, data} = ObjectValidators.Recipients.cast(message[field] || field_fallback) + + data = + Enum.reject(data, fn x -> + String.ends_with?(x, "/followers") and x != follower_collection + end) + + Map.put(message, field, data) + end + + def fix_object_defaults(data) do + context = + Utils.maybe_create_context( + data["context"] || data["conversation"] || data["inReplyTo"] || data["id"] + ) + + %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["attributedTo"]) + + data + |> Map.put("context", context) + |> cast_and_filter_recipients("to", follower_collection) + |> cast_and_filter_recipients("cc", follower_collection) + |> cast_and_filter_recipients("bto", follower_collection) + |> cast_and_filter_recipients("bcc", follower_collection) + |> Transmogrifier.fix_implicit_addressing(follower_collection) + end + + def fix_activity_addressing(activity) do + %User{follower_address: follower_collection} = User.get_cached_by_ap_id(activity["actor"]) + + activity + |> cast_and_filter_recipients("to", follower_collection) + |> cast_and_filter_recipients("cc", follower_collection) + |> cast_and_filter_recipients("bto", follower_collection) + |> cast_and_filter_recipients("bcc", follower_collection) + |> Transmogrifier.fix_implicit_addressing(follower_collection) + end + + def fix_actor(data) do + actor = + data + |> Map.put_new("actor", data["attributedTo"]) + |> Containment.get_actor() + + data + |> Map.put("actor", actor) + |> Map.put("attributedTo", actor) + end + + def fix_activity_context(data, %Object{data: %{"context" => object_context}}) do + data + |> Map.put("context", object_context) + end + + def fix_object_action_recipients(%{"actor" => actor} = data, %Object{data: %{"actor" => actor}}) do + to = ((data["to"] || []) -- [actor]) |> Enum.uniq() + + Map.put(data, "to", to) + end + + def fix_object_action_recipients(data, %Object{data: %{"actor" => actor}}) do + to = ((data["to"] || []) ++ [actor]) |> Enum.uniq() + + Map.put(data, "to", to) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/common_validations.ex b/lib/pleroma/web/activity_pub/object_validators/common_validations.ex new file mode 100644 index 0000000..1c5b1a0 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/common_validations.ex @@ -0,0 +1,150 @@ +# 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.ObjectValidators.CommonValidations do + import Ecto.Changeset + + alias Pleroma.Activity + alias Pleroma.Object + alias Pleroma.User + + @spec validate_any_presence(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t() + def validate_any_presence(cng, fields) do + non_empty = + fields + |> Enum.map(fn field -> get_field(cng, field) end) + |> Enum.any?(fn + nil -> false + [] -> false + _ -> true + end) + + if non_empty do + cng + else + fields + |> Enum.reduce(cng, fn field, cng -> + cng + |> add_error(field, "none of #{inspect(fields)} present") + end) + end + end + + @spec validate_actor_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t() + def validate_actor_presence(cng, options \\ []) do + field_name = Keyword.get(options, :field_name, :actor) + + cng + |> validate_change(field_name, fn field_name, actor -> + case User.get_cached_by_ap_id(actor) do + %User{is_active: false} -> + [{field_name, "user is deactivated"}] + + %User{} -> + [] + + _ -> + [{field_name, "can't find user"}] + end + end) + end + + @spec validate_object_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t() + def validate_object_presence(cng, options \\ []) do + field_name = Keyword.get(options, :field_name, :object) + allowed_types = Keyword.get(options, :allowed_types, false) + + cng + |> validate_change(field_name, fn field_name, object_id -> + object = Object.get_cached_by_ap_id(object_id) || Activity.get_by_ap_id(object_id) + + cond do + !object -> + [{field_name, "can't find object"}] + + object && allowed_types && object.data["type"] not in allowed_types -> + [{field_name, "object not in allowed types"}] + + true -> + [] + end + end) + end + + @spec validate_object_or_user_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t() + def validate_object_or_user_presence(cng, options \\ []) do + field_name = Keyword.get(options, :field_name, :object) + options = Keyword.put(options, :field_name, field_name) + + actor_cng = + cng + |> validate_actor_presence(options) + + object_cng = + cng + |> validate_object_presence(options) + + if actor_cng.valid?, do: actor_cng, else: object_cng + end + + @spec validate_host_match(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t() + def validate_host_match(cng, fields \\ [:id, :actor]) do + if same_domain?(cng, fields) do + cng + else + fields + |> Enum.reduce(cng, fn field, cng -> + cng + |> add_error(field, "hosts of #{inspect(fields)} aren't matching") + end) + end + end + + @spec validate_fields_match(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t() + def validate_fields_match(cng, fields) do + if map_unique?(cng, fields) do + cng + else + fields + |> Enum.reduce(cng, fn field, cng -> + cng + |> add_error(field, "Fields #{inspect(fields)} aren't matching") + end) + end + end + + defp map_unique?(cng, fields, func \\ & &1) do + Enum.reduce_while(fields, nil, fn field, acc -> + value = + cng + |> get_field(field) + |> func.() + + case {value, acc} do + {value, nil} -> {:cont, value} + {value, value} -> {:cont, value} + _ -> {:halt, false} + end + end) + end + + @spec same_domain?(Ecto.Changeset.t(), [atom()]) :: boolean() + def same_domain?(cng, fields \\ [:actor, :object]) do + map_unique?(cng, fields, fn value -> URI.parse(value).host end) + end + + # This figures out if a user is able to create, delete or modify something + # based on the domain and superuser status + @spec validate_modification_rights(Ecto.Changeset.t(), atom()) :: Ecto.Changeset.t() + def validate_modification_rights(cng, privilege) do + actor = User.get_cached_by_ap_id(get_field(cng, :actor)) + + if User.privileged?(actor, privilege) || same_domain?(cng) do + cng + else + cng + |> add_error(:actor, "is not allowed to modify object") + end + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex new file mode 100644 index 0000000..b299647 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex @@ -0,0 +1,96 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +# NOTES +# - Can probably be a generic create validator +# - doesn't embed, will only get the object id +defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateChatMessageValidator do + use Ecto.Schema + alias Pleroma.EctoType.ActivityPub.ObjectValidators + + alias Pleroma.Object + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + activity_fields() + end + end + + field(:id, ObjectValidators.ObjectID, primary_key: true) + field(:type, :string) + field(:to, ObjectValidators.Recipients, default: []) + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_data(data) do + cast(%__MODULE__{}, data, __schema__(:fields)) + end + + def cast_and_validate(data, meta \\ []) do + cast_data(data) + |> validate_data(meta) + end + + defp validate_data(cng, meta) do + cng + |> validate_required([:id, :actor, :to, :type, :object]) + |> validate_inclusion(:type, ["Create"]) + |> validate_actor_presence() + |> validate_recipients_match(meta) + |> validate_actors_match(meta) + |> validate_object_nonexistence() + end + + def validate_object_nonexistence(cng) do + cng + |> validate_change(:object, fn :object, object_id -> + if Object.get_cached_by_ap_id(object_id) do + [{:object, "The object to create already exists"}] + else + [] + end + end) + end + + def validate_actors_match(cng, meta) do + object_actor = meta[:object_data]["actor"] + + cng + |> validate_change(:actor, fn :actor, actor -> + if actor == object_actor do + [] + else + [{:actor, "Actor doesn't match with object actor"}] + end + end) + end + + def validate_recipients_match(cng, meta) do + object_recipients = meta[:object_data]["to"] || [] + + cng + |> validate_change(:to, fn :to, recipients -> + activity_set = MapSet.new(recipients) + object_set = MapSet.new(object_recipients) + + if MapSet.equal?(activity_set, object_set) do + [] + else + [{:to, "Recipients don't match with object recipients"}] + end + end) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex new file mode 100644 index 0000000..2395abf --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex @@ -0,0 +1,161 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +# Code based on CreateChatMessageValidator +# NOTES +# - doesn't embed, will only get the object id +defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do + use Ecto.Schema + + 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 + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + + field(:expires_at, ObjectValidators.DateTime) + + # Should be moved to object, done for CommonAPI.Utils.make_context + field(:context, :string) + end + + def cast_data(data, meta \\ []) do + data = fix(data, meta) + + %__MODULE__{} + |> changeset(data) + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_and_validate(data, meta \\ []) do + data + |> cast_data(meta) + |> validate_data(meta) + end + + def changeset(struct, data) do + struct + |> cast(data, __schema__(:fields)) + end + + # 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 + |> CommonFixes.cast_and_filter_recipients("to", follower_collection, object["to"]) + |> CommonFixes.cast_and_filter_recipients("cc", follower_collection, object["cc"]) + |> CommonFixes.cast_and_filter_recipients("bto", follower_collection, object["bto"]) + |> CommonFixes.cast_and_filter_recipients("bcc", follower_collection, object["bcc"]) + |> Transmogrifier.fix_implicit_addressing(follower_collection) + end + + def fix(data, meta) do + object = meta[:object_data] + + data + |> CommonFixes.fix_actor() + |> Map.put("context", object["context"]) + |> fix_addressing(object) + end + + defp validate_data(cng, meta) do + object = meta[:object_data] + + cng + |> validate_required([:actor, :type, :object, :to, :cc]) + |> validate_inclusion(:type, ["Create"]) + |> CommonValidations.validate_actor_presence() + |> validate_actors_match(object) + |> validate_context_match(object) + |> validate_addressing_match(object) + |> validate_object_nonexistence() + |> validate_object_containment() + end + + def validate_object_containment(cng) do + actor = get_field(cng, :actor) + + cng + |> validate_change(:object, fn :object, object_id -> + %URI{host: object_id_host} = URI.parse(object_id) + %URI{host: actor_host} = URI.parse(actor) + + if object_id_host == actor_host do + [] + else + [{:object, "The host of the object id doesn't match with the host of the actor"}] + end + end) + end + + def validate_object_nonexistence(cng) do + cng + |> validate_change(:object, fn :object, object_id -> + if Object.get_cached_by_ap_id(object_id) do + [{:object, "The object to create already exists"}] + else + [] + end + end) + end + + def validate_actors_match(cng, object) do + attributed_to = object["attributedTo"] || object["actor"] + + cng + |> validate_change(:actor, fn :actor, actor -> + if actor == attributed_to do + [] + else + [{:actor, "Actor doesn't match with object attributedTo"}] + end + end) + end + + def validate_context_match(cng, %{"context" => object_context}) do + cng + |> validate_change(:context, fn :context, context -> + if context == object_context do + [] + else + [{:context, "context field not matching between Create and object (#{object_context})"}] + end + end) + end + + 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 diff --git a/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex b/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex new file mode 100644 index 0000000..4d8502a --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex @@ -0,0 +1,87 @@ +# 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.ObjectValidators.DeleteValidator do + use Ecto.Schema + + alias Pleroma.Activity + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.User + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + + field(:deleted_activity_id, ObjectValidators.ObjectID) + end + + def cast_data(data) do + %__MODULE__{} + |> cast(data, __schema__(:fields)) + end + + def add_deleted_activity_id(cng) do + object = + cng + |> get_field(:object) + + with %Activity{id: id} <- Activity.get_create_by_object_ap_id(object) do + cng + |> put_change(:deleted_activity_id, id) + else + _ -> cng + end + end + + @deletable_types ~w{ + Answer + Article + Audio + ChatMessage + Event + Note + Page + Question + Tombstone + Video + } + defp validate_data(cng) do + cng + |> validate_required([:id, :type, :actor, :to, :cc, :object]) + |> validate_inclusion(:type, ["Delete"]) + |> validate_delete_actor(:actor) + |> validate_modification_rights(:messages_delete) + |> validate_object_or_user_presence(allowed_types: @deletable_types) + |> add_deleted_activity_id() + end + + def do_not_federate?(cng) do + !same_domain?(cng) + end + + def cast_and_validate(data) do + data + |> cast_data + |> validate_data + end + + defp validate_delete_actor(cng, field_name) do + validate_change(cng, field_name, fn field_name, actor -> + case User.get_cached_by_ap_id(actor) do + %User{} -> [] + _ -> [{field_name, "can't find user"}] + end + end) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex b/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex new file mode 100644 index 0000000..0858281 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex @@ -0,0 +1,101 @@ +# 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.ObjectValidators.EmojiReactValidator do + use Ecto.Schema + + alias Pleroma.Object + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + + field(:context, :string) + field(:content, :string) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + data = + data + |> fix() + + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, data) do + struct + |> cast(data, __schema__(:fields)) + end + + defp fix(data) do + data = + data + |> fix_emoji_qualification() + |> CommonFixes.fix_actor() + |> CommonFixes.fix_activity_addressing() + + with %Object{} = object <- Object.normalize(data["object"]) do + data + |> CommonFixes.fix_activity_context(object) + |> CommonFixes.fix_object_action_recipients(object) + else + _ -> data + end + end + + defp fix_emoji_qualification(%{"content" => emoji} = data) do + new_emoji = Pleroma.Emoji.fully_qualify_emoji(emoji) + + cond do + Pleroma.Emoji.is_unicode_emoji?(emoji) -> + data + + Pleroma.Emoji.is_unicode_emoji?(new_emoji) -> + data |> Map.put("content", new_emoji) + + true -> + data + end + end + + defp fix_emoji_qualification(data), do: data + + defp validate_emoji(cng) do + content = get_field(cng, :content) + + if Pleroma.Emoji.is_unicode_emoji?(content) do + cng + else + cng + |> add_error(:content, "must be a single character emoji") + end + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["EmojiReact"]) + |> validate_required([:id, :type, :object, :actor, :context, :to, :cc, :content]) + |> validate_actor_presence() + |> validate_object_presence() + |> validate_emoji() + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex new file mode 100644 index 0000000..ab204f6 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex @@ -0,0 +1,71 @@ +# 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.ObjectValidators.EventValidator do + use Ecto.Schema + + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + alias Pleroma.Web.ActivityPub.Transmogrifier + + import Ecto.Changeset + + @primary_key false + @derive Jason.Encoder + + # Extends from NoteValidator + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + object_fields() + status_object_fields() + end + end + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + defp fix(data) do + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_object_defaults() + |> Transmogrifier.fix_emoji() + end + + def changeset(struct, data) do + data = fix(data) + + struct + |> cast(data, __schema__(:fields) -- [:attachment, :tag]) + |> cast_embed(:attachment) + |> cast_embed(:tag) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Event"]) + |> validate_required([:id, :actor, :attributedTo, :type, :context]) + |> CommonValidations.validate_any_presence([:cc, :to]) + |> CommonValidations.validate_fields_match([:actor, :attributedTo]) + |> CommonValidations.validate_actor_presence() + |> CommonValidations.validate_host_match() + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex b/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex new file mode 100644 index 0000000..b3ca5b6 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex @@ -0,0 +1,44 @@ +# 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.ObjectValidators.FollowValidator do + use Ecto.Schema + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + + field(:state, :string, default: "pending") + end + + def cast_data(data) do + %__MODULE__{} + |> cast(data, __schema__(:fields)) + end + + defp validate_data(cng) do + cng + |> validate_required([:id, :type, :actor, :to, :cc, :object]) + |> validate_inclusion(:type, ["Follow"]) + |> validate_inclusion(:state, ~w{pending reject accept}) + |> validate_actor_presence() + |> validate_actor_presence(field_name: :object) + end + + def cast_and_validate(data) do + data + |> cast_data + |> validate_data + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/like_validator.ex b/lib/pleroma/web/activity_pub/object_validators/like_validator.ex new file mode 100644 index 0000000..bdc4d71 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/like_validator.ex @@ -0,0 +1,84 @@ +# 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.ObjectValidators.LikeValidator do + use Ecto.Schema + + alias Pleroma.Object + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.Utils + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + + field(:context, :string) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + data = + data + |> fix() + + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, data) do + struct + |> cast(data, __schema__(:fields)) + end + + defp fix(data) do + data = + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_activity_addressing() + + with %Object{} = object <- Object.normalize(data["object"]) do + data + |> CommonFixes.fix_activity_context(object) + |> CommonFixes.fix_object_action_recipients(object) + else + _ -> data + end + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Like"]) + |> validate_required([:id, :type, :object, :actor, :context, :to, :cc]) + |> validate_actor_presence() + |> validate_object_presence() + |> validate_existing_like() + end + + defp validate_existing_like(%{changes: %{actor: actor, object: object}} = cng) do + if Utils.get_existing_like(actor, %{data: %{"id" => object}}) do + cng + |> add_error(:actor, "already liked this object") + |> add_error(:object, "already liked by this actor") + else + cng + end + end + + defp validate_existing_like(cng), do: cng +end diff --git a/lib/pleroma/web/activity_pub/object_validators/question_options_validator.ex b/lib/pleroma/web/activity_pub/object_validators/question_options_validator.ex new file mode 100644 index 0000000..541945f --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/question_options_validator.ex @@ -0,0 +1,37 @@ +# 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.ObjectValidators.QuestionOptionsValidator do + use Ecto.Schema + + import Ecto.Changeset + + @primary_key false + + embedded_schema do + field(:name, :string) + + embeds_one :replies, Replies, primary_key: false do + field(:totalItems, :integer) + field(:type, :string) + end + + field(:type, :string) + end + + def changeset(struct, data) do + struct + |> cast(data, [:name, :type]) + |> cast_embed(:replies, with: &replies_changeset/2) + |> validate_inclusion(:type, ["Note"]) + |> validate_required([:name, :type]) + end + + def replies_changeset(struct, data) do + struct + |> cast(data, [:totalItems, :type]) + |> validate_inclusion(:type, ["Collection"]) + |> validate_required([:type]) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex new file mode 100644 index 0000000..ce33051 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex @@ -0,0 +1,90 @@ +# 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.ObjectValidators.QuestionValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes + alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + alias Pleroma.Web.ActivityPub.ObjectValidators.QuestionOptionsValidator + alias Pleroma.Web.ActivityPub.Transmogrifier + + import Ecto.Changeset + + @primary_key false + @derive Jason.Encoder + + # Extends from NoteValidator + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + object_fields() + status_object_fields() + end + end + + field(:closed, ObjectValidators.DateTime) + field(:voters, {:array, ObjectValidators.ObjectID}, default: []) + embeds_many(:anyOf, QuestionOptionsValidator) + embeds_many(:oneOf, QuestionOptionsValidator) + end + + def cast_and_apply(data) do + data + |> cast_data + |> apply_action(:insert) + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + defp fix_closed(data) do + cond do + is_binary(data["closed"]) -> data + is_binary(data["endTime"]) -> Map.put(data, "closed", data["endTime"]) + true -> Map.drop(data, ["closed"]) + end + end + + defp fix(data) do + data + |> CommonFixes.fix_actor() + |> CommonFixes.fix_object_defaults() + |> Transmogrifier.fix_emoji() + |> fix_closed() + end + + def changeset(struct, data) do + data = fix(data) + + struct + |> cast(data, __schema__(:fields) -- [:anyOf, :oneOf, :attachment, :tag]) + |> cast_embed(:attachment) + |> cast_embed(:anyOf) + |> cast_embed(:oneOf) + |> cast_embed(:tag) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Question"]) + |> validate_required([:id, :actor, :attributedTo, :type, :context]) + |> CommonValidations.validate_any_presence([:cc, :to]) + |> CommonValidations.validate_fields_match([:actor, :attributedTo]) + |> CommonValidations.validate_actor_presence() + |> CommonValidations.validate_any_presence([:oneOf, :anyOf]) + |> CommonValidations.validate_host_match() + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/tag_validator.ex b/lib/pleroma/web/activity_pub/object_validators/tag_validator.ex new file mode 100644 index 0000000..9f15f19 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/tag_validator.ex @@ -0,0 +1,77 @@ +# 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.ObjectValidators.TagValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + + import Ecto.Changeset + + @primary_key false + embedded_schema do + # Common + field(:type, :string) + field(:name, :string) + + # Mention, Hashtag + field(:href, ObjectValidators.Uri) + + # Emoji + embeds_one :icon, IconObjectValidator, primary_key: false do + field(:type, :string) + field(:url, ObjectValidators.Uri) + end + + field(:updated, ObjectValidators.DateTime) + field(:id, ObjectValidators.Uri) + end + + def cast_and_validate(data) do + data + |> cast_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, %{"type" => "Mention"} = data) do + struct + |> cast(data, [:type, :name, :href]) + |> validate_required([:type, :href]) + end + + def changeset(struct, %{"type" => "Hashtag", "name" => name} = data) do + name = + cond do + "#" <> name -> name + name -> name + end + |> String.downcase() + + data = Map.put(data, "name", name) + + struct + |> cast(data, [:type, :name, :href]) + |> validate_required([:type, :name]) + end + + def changeset(struct, %{"type" => "Emoji"} = data) do + data = Map.put(data, "name", String.trim(data["name"], ":")) + + struct + |> cast(data, [:type, :name, :updated, :id]) + |> cast_embed(:icon, with: &icon_changeset/2) + |> validate_required([:type, :name, :icon]) + end + + def icon_changeset(struct, data) do + struct + |> cast(data, [:type, :url]) + |> validate_inclusion(:type, ~w[Image]) + |> validate_required([:type, :url]) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex b/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex new file mode 100644 index 0000000..f030514 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex @@ -0,0 +1,72 @@ +# 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.ObjectValidators.UndoValidator do + use Ecto.Schema + + alias Pleroma.Activity + alias Pleroma.User + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + activity_fields() + end + end + end + + def cast_and_validate(data) do + data + |> cast_data() + |> validate_data() + end + + def cast_data(data) do + %__MODULE__{} + |> changeset(data) + end + + def changeset(struct, data) do + struct + |> cast(data, __schema__(:fields)) + end + + defp validate_data(data_cng) do + data_cng + |> validate_inclusion(:type, ["Undo"]) + |> validate_required([:id, :type, :object, :actor, :to, :cc]) + |> validate_undo_actor(:actor) + |> validate_object_presence() + |> validate_undo_rights() + end + + def validate_undo_rights(cng) do + actor = get_field(cng, :actor) + object = get_field(cng, :object) + + with %Activity{data: %{"actor" => object_actor}} <- Activity.get_by_ap_id(object), + true <- object_actor != actor do + cng + |> add_error(:actor, "not the same as object actor") + else + _ -> cng + end + end + + defp validate_undo_actor(cng, field_name) do + validate_change(cng, field_name, fn field_name, actor -> + case User.get_cached_by_ap_id(actor) do + %User{} -> [] + _ -> [{field_name, "can't find user"}] + end + end) + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/update_validator.ex b/lib/pleroma/web/activity_pub/object_validators/update_validator.ex new file mode 100644 index 0000000..1e940a4 --- /dev/null +++ b/lib/pleroma/web/activity_pub/object_validators/update_validator.ex @@ -0,0 +1,64 @@ +# 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.ObjectValidators.UpdateValidator do + use Ecto.Schema + + alias Pleroma.EctoType.ActivityPub.ObjectValidators + + import Ecto.Changeset + import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations + + @primary_key false + + embedded_schema do + quote do + unquote do + import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields + message_fields() + end + end + + field(:actor, ObjectValidators.ObjectID) + # In this case, we save the full object in this activity instead of just a + # reference, so we can always see what was actually changed by this. + field(:object, :map) + end + + def cast_data(data) do + %__MODULE__{} + |> cast(data, __schema__(:fields)) + end + + defp validate_data(cng) do + cng + |> validate_required([:id, :type, :actor, :to, :cc, :object]) + |> validate_inclusion(:type, ["Update"]) + |> validate_actor_presence() + |> validate_updating_rights() + end + + def cast_and_validate(data) do + data + |> cast_data + |> validate_data + end + + # For now we only support updating users, and here the rule is easy: + # object id == actor id + def validate_updating_rights(cng) do + with actor = get_field(cng, :actor), + object = get_field(cng, :object), + {:ok, object_id} <- ObjectValidators.ObjectID.cast(object), + actor_uri <- URI.parse(actor), + object_uri <- URI.parse(object_id), + true <- actor_uri.host == object_uri.host do + cng + else + _e -> + cng + |> add_error(:object, "Can't be updated by this actor") + end + end +end |