# Copyright 2019 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from typing import Callable, Dict, Optional, Tuple import attr class EventFormatVersions: """This is an internal enum for tracking the version of the event format, independently of the room version. To reduce confusion, the event format versions are named after the room versions that they were used or introduced in. The concept of an 'event format version' is specific to Synapse (the specification does not mention this term.) """ ROOM_V1_V2 = 1 # $id:server event id format: used for room v1 and v2 ROOM_V3 = 2 # MSC1659-style $hash event id format: used for room v3 ROOM_V4_PLUS = 3 # MSC1884-style $hash format: introduced for room v4 LINEARIZED = 4 # Delegated Linearized event KNOWN_EVENT_FORMAT_VERSIONS = { EventFormatVersions.ROOM_V1_V2, EventFormatVersions.ROOM_V3, EventFormatVersions.ROOM_V4_PLUS, EventFormatVersions.LINEARIZED, } class StateResolutionVersions: """Enum to identify the state resolution algorithms""" V1 = 1 # room v1 state res V2 = 2 # MSC1442 state res: room v2 and later class RoomDisposition: STABLE = "stable" UNSTABLE = "unstable" class PushRuleRoomFlag: """Enum for listing possible MSC3931 room version feature flags, for push rules""" # MSC3932: Room version supports MSC1767 Extensible Events. EXTENSIBLE_EVENTS = "org.matrix.msc3932.extensible_events" @attr.s(slots=True, frozen=True, auto_attribs=True) class RoomVersion: """An object which describes the unique attributes of a room version.""" identifier: str # the identifier for this version disposition: str # one of the RoomDispositions event_format: int # one of the EventFormatVersions state_res: int # one of the StateResolutionVersions enforce_key_validity: bool # Before MSC2432, m.room.aliases had special auth rules and redaction rules special_case_aliases_auth: bool # Strictly enforce canonicaljson, do not allow: # * Integers outside the range of [-2 ^ 53 + 1, 2 ^ 53 - 1] # * Floats # * NaN, Infinity, -Infinity strict_canonicaljson: bool # MSC2209: Check 'notifications' key while verifying # m.room.power_levels auth rules. limit_notifications_power_levels: bool # MSC2175: No longer include the creator in m.room.create events. msc2175_implicit_room_creator: bool # MSC2174/MSC2176: Apply updated redaction rules algorithm, move redacts to # content property. msc2176_redaction_rules: bool # MSC3083: Support the 'restricted' join_rule. msc3083_join_rules: bool # MSC3375: Support for the proper redaction rules for MSC3083. This mustn't # be enabled if MSC3083 is not. msc3375_redaction_rules: bool # MSC2403: Allows join_rules to be set to 'knock', changes auth rules to allow sending # m.room.membership event with membership 'knock'. msc2403_knocking: bool # MSC3389: Protect relation information from redaction. msc3389_relation_redactions: bool # MSC3787: Adds support for a `knock_restricted` join rule, mixing concepts of # knocks and restricted join rules into the same join condition. msc3787_knock_restricted_join_rule: bool # MSC3667: Enforce integer power levels msc3667_int_only_power_levels: bool # MSC3821: Do not redact the third_party_invite content field for membership events. msc3821_redaction_rules: bool # MSC3931: Adds a push rule condition for "room version feature flags", making # some push rules room version dependent. Note that adding a flag to this list # is not enough to mark it "supported": the push rule evaluator also needs to # support the flag. Unknown flags are ignored by the evaluator, making conditions # fail if used. msc3931_push_features: Tuple[str, ...] # values from PushRuleRoomFlag # MSC3989: Redact the origin field. msc3989_redaction_rules: bool linearized_matrix: bool class RoomVersions: V1 = RoomVersion( "1", RoomDisposition.STABLE, EventFormatVersions.ROOM_V1_V2, StateResolutionVersions.V1, enforce_key_validity=False, special_case_aliases_auth=True, strict_canonicaljson=False, limit_notifications_power_levels=False, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V2 = RoomVersion( "2", RoomDisposition.STABLE, EventFormatVersions.ROOM_V1_V2, StateResolutionVersions.V2, enforce_key_validity=False, special_case_aliases_auth=True, strict_canonicaljson=False, limit_notifications_power_levels=False, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V3 = RoomVersion( "3", RoomDisposition.STABLE, EventFormatVersions.ROOM_V3, StateResolutionVersions.V2, enforce_key_validity=False, special_case_aliases_auth=True, strict_canonicaljson=False, limit_notifications_power_levels=False, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V4 = RoomVersion( "4", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=False, special_case_aliases_auth=True, strict_canonicaljson=False, limit_notifications_power_levels=False, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V5 = RoomVersion( "5", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=True, strict_canonicaljson=False, limit_notifications_power_levels=False, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V6 = RoomVersion( "6", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) MSC2176 = RoomVersion( "org.matrix.msc2176", RoomDisposition.UNSTABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=True, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=False, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V7 = RoomVersion( "7", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V8 = RoomVersion( "8", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=False, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V9 = RoomVersion( "9", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) MSC3787 = RoomVersion( "org.matrix.msc3787", RoomDisposition.UNSTABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=True, msc3667_int_only_power_levels=False, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) MSC3821 = RoomVersion( "org.matrix.msc3821.opt1", RoomDisposition.UNSTABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=False, msc3821_redaction_rules=True, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) V10 = RoomVersion( "10", RoomDisposition.STABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=True, msc3667_int_only_power_levels=True, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=False, linearized_matrix=False, ) MSC1767v10 = RoomVersion( # MSC1767 (Extensible Events) based on room version "10" "org.matrix.msc1767.10", RoomDisposition.UNSTABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=True, msc3667_int_only_power_levels=True, msc3821_redaction_rules=False, msc3931_push_features=(PushRuleRoomFlag.EXTENSIBLE_EVENTS,), msc3989_redaction_rules=False, linearized_matrix=False, ) MSC3989 = RoomVersion( "org.matrix.msc3989", RoomDisposition.UNSTABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=False, msc2176_redaction_rules=False, msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=True, msc3667_int_only_power_levels=True, msc3821_redaction_rules=False, msc3931_push_features=(), msc3989_redaction_rules=True, linearized_matrix=False, ) MSC3820opt2 = RoomVersion( # Based upon v10 "org.matrix.msc3820.opt2", RoomDisposition.UNSTABLE, EventFormatVersions.ROOM_V4_PLUS, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=True, # Used by MSC3820 msc2176_redaction_rules=True, # Used by MSC3820 msc3083_join_rules=True, msc3375_redaction_rules=True, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=True, msc3667_int_only_power_levels=True, msc3821_redaction_rules=True, # Used by MSC3820 msc3931_push_features=(), msc3989_redaction_rules=True, # Used by MSC3820 linearized_matrix=False, ) # Based on room version 11: # # - Enable MSC2176, MSC2175, MSC3989, MSC2174, MSC1767, MSC3821. # - Disable 'restricted' and 'knock_restricted' join rules. # - Mark as linearized. LINEARIZED = RoomVersion( "org.matrix.i-d.ralston-mimi-linearized-matrix.02", RoomDisposition.UNSTABLE, EventFormatVersions.LINEARIZED, StateResolutionVersions.V2, enforce_key_validity=True, special_case_aliases_auth=False, strict_canonicaljson=True, limit_notifications_power_levels=True, msc2175_implicit_room_creator=True, msc2176_redaction_rules=True, msc3083_join_rules=False, msc3375_redaction_rules=False, msc2403_knocking=True, msc3389_relation_redactions=False, msc3787_knock_restricted_join_rule=False, msc3667_int_only_power_levels=True, msc3821_redaction_rules=True, msc3931_push_features=(), msc3989_redaction_rules=True, linearized_matrix=True, ) KNOWN_ROOM_VERSIONS: Dict[str, RoomVersion] = { v.identifier: v for v in ( RoomVersions.V1, RoomVersions.V2, RoomVersions.V3, RoomVersions.V4, RoomVersions.V5, RoomVersions.V6, RoomVersions.MSC2176, RoomVersions.V7, RoomVersions.V8, RoomVersions.V9, RoomVersions.MSC3787, RoomVersions.V10, RoomVersions.MSC3989, RoomVersions.MSC3820opt2, RoomVersions.LINEARIZED, ) } @attr.s(slots=True, frozen=True, auto_attribs=True) class RoomVersionCapability: """An object which describes the unique attributes of a room version.""" identifier: str # the identifier for this capability preferred_version: Optional[RoomVersion] support_check_lambda: Callable[[RoomVersion], bool] MSC3244_CAPABILITIES = { cap.identifier: { "preferred": cap.preferred_version.identifier if cap.preferred_version is not None else None, "support": [ v.identifier for v in KNOWN_ROOM_VERSIONS.values() if cap.support_check_lambda(v) ], } for cap in ( RoomVersionCapability( "knock", RoomVersions.V7, lambda room_version: room_version.msc2403_knocking, ), RoomVersionCapability( "restricted", RoomVersions.V9, lambda room_version: room_version.msc3083_join_rules, ), ) }