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Compact JSON-LD signed incoming activities (#17426) 

Co-authored-by: Puck Meerburg <puck@puck.moe>
gh/stable
Claire 2022-02-03 14:07:29 +01:00 committed by GitHub
parent d0d15bf49c
commit d1ecc323e7
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 66 additions and 49 deletions
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54
app/helpers/context_helper.rb 100644
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@ -0,0 +1,54 @@
# frozen_string_literal: true
module ContextHelper
NAMED_CONTEXT_MAP = {
activitystreams: 'https://www.w3.org/ns/activitystreams',
security: 'https://w3id.org/security/v1',
}.freeze
CONTEXT_EXTENSION_MAP = {
manually_approves_followers: { 'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers' },
sensitive: { 'sensitive' => 'as:sensitive' },
hashtag: { 'Hashtag' => 'as:Hashtag' },
moved_to: { 'movedTo' => { '@id' => 'as:movedTo', '@type' => '@id' } },
also_known_as: { 'alsoKnownAs' => { '@id' => 'as:alsoKnownAs', '@type' => '@id' } },
emoji: { 'toot' => 'http://joinmastodon.org/ns#', 'Emoji' => 'toot:Emoji' },
featured: { 'toot' => 'http://joinmastodon.org/ns#', 'featured' => { '@id' => 'toot:featured', '@type' => '@id' }, 'featuredTags' => { '@id' => 'toot:featuredTags', '@type' => '@id' } },
property_value: { 'schema' => 'http://schema.org#', 'PropertyValue' => 'schema:PropertyValue', 'value' => 'schema:value' },
atom_uri: { 'ostatus' => 'http://ostatus.org#', 'atomUri' => 'ostatus:atomUri' },
conversation: { 'ostatus' => 'http://ostatus.org#', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri', 'conversation' => 'ostatus:conversation' },
focal_point: { 'toot' => 'http://joinmastodon.org/ns#', 'focalPoint' => { '@container' => '@list', '@id' => 'toot:focalPoint' } },
blurhash: { 'toot' => 'http://joinmastodon.org/ns#', 'blurhash' => 'toot:blurhash' },
discoverable: { 'toot' => 'http://joinmastodon.org/ns#', 'discoverable' => 'toot:discoverable' },
voters_count: { 'toot' => 'http://joinmastodon.org/ns#', 'votersCount' => 'toot:votersCount' },
olm: { 'toot' => 'http://joinmastodon.org/ns#', 'Device' => 'toot:Device', 'Ed25519Signature' => 'toot:Ed25519Signature', 'Ed25519Key' => 'toot:Ed25519Key', 'Curve25519Key' => 'toot:Curve25519Key', 'EncryptedMessage' => 'toot:EncryptedMessage', 'publicKeyBase64' => 'toot:publicKeyBase64', 'deviceId' => 'toot:deviceId', 'claim' => { '@type' => '@id', '@id' => 'toot:claim' }, 'fingerprintKey' => { '@type' => '@id', '@id' => 'toot:fingerprintKey' }, 'identityKey' => { '@type' => '@id', '@id' => 'toot:identityKey' }, 'devices' => { '@type' => '@id', '@id' => 'toot:devices' }, 'messageFranking' => 'toot:messageFranking', 'messageType' => 'toot:messageType', 'cipherText' => 'toot:cipherText' },
suspended: { 'toot' => 'http://joinmastodon.org/ns#', 'suspended' => 'toot:suspended' },
}.freeze
def full_context
serialized_context(NAMED_CONTEXT_MAP, CONTEXT_EXTENSION_MAP)
end
def serialized_context(named_contexts_map, context_extensions_map)
context_array = []
named_contexts = named_contexts_map.keys
context_extensions = context_extensions_map.keys
named_contexts.each do |key|
context_array << NAMED_CONTEXT_MAP[key]
end
extensions = context_extensions.each_with_object({}) do |key, h|
h.merge!(CONTEXT_EXTENSION_MAP[key])
end
context_array << extensions unless extensions.empty?
if context_array.size == 1
context_array.first
else
context_array
end
end
end

8
app/helpers/jsonld_helper.rb
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@ -1,6 +1,8 @@
# frozen_string_literal: true
module JsonLdHelper
include ContextHelper
def equals_or_includes?(haystack, needle)
haystack.is_a?(Array) ? haystack.include?(needle) : haystack == needle
end
@ -69,6 +71,12 @@ module JsonLdHelper
graph.dump(:normalize)
end
def compact(json)
compacted = JSON::LD::API.compact(json.without('signature'), full_context, documentLoader: method(:load_jsonld_context))
compacted['signature'] = json['signature']
compacted
end
def fetch_resource(uri, id, on_behalf_of = nil)
unless id
json = fetch_resource_without_id_validation(uri, on_behalf_of)

51
app/lib/activitypub/adapter.rb
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@ -1,29 +1,7 @@
# frozen_string_literal: true
class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
NAMED_CONTEXT_MAP = {
activitystreams: 'https://www.w3.org/ns/activitystreams',
security: 'https://w3id.org/security/v1',
}.freeze
CONTEXT_EXTENSION_MAP = {
manually_approves_followers: { 'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers' },
sensitive: { 'sensitive' => 'as:sensitive' },
hashtag: { 'Hashtag' => 'as:Hashtag' },
moved_to: { 'movedTo' => { '@id' => 'as:movedTo', '@type' => '@id' } },
also_known_as: { 'alsoKnownAs' => { '@id' => 'as:alsoKnownAs', '@type' => '@id' } },
emoji: { 'toot' => 'http://joinmastodon.org/ns#', 'Emoji' => 'toot:Emoji' },
featured: { 'toot' => 'http://joinmastodon.org/ns#', 'featured' => { '@id' => 'toot:featured', '@type' => '@id' }, 'featuredTags' => { '@id' => 'toot:featuredTags', '@type' => '@id' } },
property_value: { 'schema' => 'http://schema.org#', 'PropertyValue' => 'schema:PropertyValue', 'value' => 'schema:value' },
atom_uri: { 'ostatus' => 'http://ostatus.org#', 'atomUri' => 'ostatus:atomUri' },
conversation: { 'ostatus' => 'http://ostatus.org#', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri', 'conversation' => 'ostatus:conversation' },
focal_point: { 'toot' => 'http://joinmastodon.org/ns#', 'focalPoint' => { '@container' => '@list', '@id' => 'toot:focalPoint' } },
blurhash: { 'toot' => 'http://joinmastodon.org/ns#', 'blurhash' => 'toot:blurhash' },
discoverable: { 'toot' => 'http://joinmastodon.org/ns#', 'discoverable' => 'toot:discoverable' },
voters_count: { 'toot' => 'http://joinmastodon.org/ns#', 'votersCount' => 'toot:votersCount' },
olm: { 'toot' => 'http://joinmastodon.org/ns#', 'Device' => 'toot:Device', 'Ed25519Signature' => 'toot:Ed25519Signature', 'Ed25519Key' => 'toot:Ed25519Key', 'Curve25519Key' => 'toot:Curve25519Key', 'EncryptedMessage' => 'toot:EncryptedMessage', 'publicKeyBase64' => 'toot:publicKeyBase64', 'deviceId' => 'toot:deviceId', 'claim' => { '@type' => '@id', '@id' => 'toot:claim' }, 'fingerprintKey' => { '@type' => '@id', '@id' => 'toot:fingerprintKey' }, 'identityKey' => { '@type' => '@id', '@id' => 'toot:identityKey' }, 'devices' => { '@type' => '@id', '@id' => 'toot:devices' }, 'messageFranking' => 'toot:messageFranking', 'messageType' => 'toot:messageType', 'cipherText' => 'toot:cipherText' },
suspended: { 'toot' => 'http://joinmastodon.org/ns#', 'suspended' => 'toot:suspended' },
}.freeze
include ContextHelper
def self.default_key_transform
:camel_lower
@ -34,7 +12,7 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
end
def serializable_hash(options = nil)
named_contexts = {}
named_contexts = { activitystreams: NAMED_CONTEXT_MAP['activitystreams'] }
context_extensions = {}
options = serialization_options(options)
@ -44,29 +22,4 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
{ '@context' => serialized_context(named_contexts, context_extensions) }.merge(serialized_hash)
end
private
def serialized_context(named_contexts_map, context_extensions_map)
context_array = []
named_contexts = [:activitystreams] + named_contexts_map.keys
context_extensions = context_extensions_map.keys
named_contexts.each do |key|
context_array << NAMED_CONTEXT_MAP[key]
end
extensions = context_extensions.each_with_object({}) do |key, h|
h.merge!(CONTEXT_EXTENSION_MAP[key])
end
context_array << extensions unless extensions.empty?
if context_array.size == 1
context_array.first
else
context_array
end
end
end

2
app/services/activitypub/process_collection_service.rb
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@ -8,6 +8,8 @@ class ActivityPub::ProcessCollectionService < BaseService
@json = Oj.load(body, mode: :strict)
@options = options
@json = compact(@json) if @json['signature'].is_a?(Hash)
return if !supported_context? || (different_actor? && verify_account!.nil?) || suspended_actor? || @account.local?
case @json['type']