From fe0210074ffebec0a424dc8be65dd8f32296a08c Mon Sep 17 00:00:00 2001 From: Puck Meerburg Date: Sat, 22 Jan 2022 13:48:27 +0000 Subject: [PATCH] Compact JSON-LD signed incoming activities --- app/helpers/context_helper.rb | 55 +++++++++++++++++++ app/helpers/jsonld_helper.rb | 8 +++ app/lib/activitypub/adapter.rb | 52 +----------------- .../activitypub/process_collection_service.rb | 2 + 4 files changed, 67 insertions(+), 50 deletions(-) create mode 100644 app/helpers/context_helper.rb diff --git a/app/helpers/context_helper.rb b/app/helpers/context_helper.rb new file mode 100644 index 000000000..2c7541ad4 --- /dev/null +++ b/app/helpers/context_helper.rb @@ -0,0 +1,55 @@ +# 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' } }, + identity_proof: { 'toot' => 'http://joinmastodon.org/ns#', 'IdentityProof' => 'toot:IdentityProof' }, + 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 diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb index 62eb50f78..c290c77ce 100644 --- a/app/helpers/jsonld_helper.rb +++ b/app/helpers/jsonld_helper.rb @@ -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 @@ -63,6 +65,12 @@ 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) diff --git a/app/lib/activitypub/adapter.rb b/app/lib/activitypub/adapter.rb index 2d6b87659..098b6296f 100644 --- a/app/lib/activitypub/adapter.rb +++ b/app/lib/activitypub/adapter.rb @@ -1,30 +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' } }, - identity_proof: { 'toot' => 'http://joinmastodon.org/ns#', 'IdentityProof' => 'toot:IdentityProof' }, - 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 @@ -35,7 +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) @@ -45,29 +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 diff --git a/app/services/activitypub/process_collection_service.rb b/app/services/activitypub/process_collection_service.rb index 170e6709c..5f3d63bb3 100644 --- a/app/services/activitypub/process_collection_service.rb +++ b/app/services/activitypub/process_collection_service.rb @@ -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']