# Copyright 2021 The Matrix.org Foundation C.I.C. # # 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. import enum from typing import TYPE_CHECKING, Any, Optional import attr import attr.validators from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions from synapse.config import ConfigError from synapse.config._base import Config, RootConfig from synapse.types import JsonDict # Determine whether authlib is installed. try: import authlib # noqa: F401 HAS_AUTHLIB = True except ImportError: HAS_AUTHLIB = False if TYPE_CHECKING: # Only import this if we're type checking, as it might not be installed at runtime. from authlib.jose.rfc7517 import JsonWebKey class ClientAuthMethod(enum.Enum): """List of supported client auth methods.""" CLIENT_SECRET_POST = "client_secret_post" CLIENT_SECRET_BASIC = "client_secret_basic" CLIENT_SECRET_JWT = "client_secret_jwt" PRIVATE_KEY_JWT = "private_key_jwt" def _parse_jwks(jwks: Optional[JsonDict]) -> Optional["JsonWebKey"]: """A helper function to parse a JWK dict into a JsonWebKey.""" if jwks is None: return None from authlib.jose.rfc7517 import JsonWebKey return JsonWebKey.import_key(jwks) @attr.s(slots=True, frozen=True) class MSC3861: """Configuration for MSC3861: Matrix architecture change to delegate authentication via OIDC""" enabled: bool = attr.ib(default=False, validator=attr.validators.instance_of(bool)) """Whether to enable MSC3861 auth delegation.""" @enabled.validator def _check_enabled(self, attribute: attr.Attribute, value: bool) -> None: # Only allow enabling MSC3861 if authlib is installed if value and not HAS_AUTHLIB: raise ConfigError( "MSC3861 is enabled but authlib is not installed. " "Please install authlib to use MSC3861.", ("experimental", "msc3861", "enabled"), ) issuer: str = attr.ib(default="", validator=attr.validators.instance_of(str)) """The URL of the OIDC Provider.""" issuer_metadata: Optional[JsonDict] = attr.ib(default=None) """The issuer metadata to use, otherwise discovered from /.well-known/openid-configuration as per MSC2965.""" client_id: str = attr.ib( default="", validator=attr.validators.instance_of(str), ) """The client ID to use when calling the introspection endpoint.""" client_auth_method: ClientAuthMethod = attr.ib( default=ClientAuthMethod.CLIENT_SECRET_POST, converter=ClientAuthMethod ) """The auth method used when calling the introspection endpoint.""" client_secret: Optional[str] = attr.ib( default=None, validator=attr.validators.optional(attr.validators.instance_of(str)), ) """ The client secret to use when calling the introspection endpoint, when using any of the client_secret_* client auth methods. """ jwk: Optional["JsonWebKey"] = attr.ib(default=None, converter=_parse_jwks) """ The JWKS to use when calling the introspection endpoint, when using the private_key_jwt client auth method. """ @client_auth_method.validator def _check_client_auth_method( self, attribute: attr.Attribute, value: ClientAuthMethod ) -> None: # Check that the right client credentials are provided for the client auth method. if not self.enabled: return if value == ClientAuthMethod.PRIVATE_KEY_JWT and self.jwk is None: raise ConfigError( "A JWKS must be provided when using the private_key_jwt client auth method", ("experimental", "msc3861", "client_auth_method"), ) if ( value in ( ClientAuthMethod.CLIENT_SECRET_POST, ClientAuthMethod.CLIENT_SECRET_BASIC, ClientAuthMethod.CLIENT_SECRET_JWT, ) and self.client_secret is None ): raise ConfigError( f"A client secret must be provided when using the {value} client auth method", ("experimental", "msc3861", "client_auth_method"), ) account_management_url: Optional[str] = attr.ib( default=None, validator=attr.validators.optional(attr.validators.instance_of(str)), ) """The URL of the My Account page on the OIDC Provider as per MSC2965.""" admin_token: Optional[str] = attr.ib( default=None, validator=attr.validators.optional(attr.validators.instance_of(str)), ) """ A token that should be considered as an admin token. This is used by the OIDC provider, to make admin calls to Synapse. """ def check_config_conflicts(self, root: RootConfig) -> None: """Checks for any configuration conflicts with other parts of Synapse. Raises: ConfigError: If there are any configuration conflicts. """ if not self.enabled: return if ( root.auth.password_enabled_for_reauth or root.auth.password_enabled_for_login ): raise ConfigError( "Password auth cannot be enabled when OAuth delegation is enabled", ("password_config", "enabled"), ) if root.registration.enable_registration: raise ConfigError( "Registration cannot be enabled when OAuth delegation is enabled", ("enable_registration",), ) # We only need to test the user consent version, as if it must be set if the user_consent section was present in the config if root.consent.user_consent_version is not None: raise ConfigError( "User consent cannot be enabled when OAuth delegation is enabled", ("user_consent",), ) if ( root.oidc.oidc_enabled or root.saml2.saml2_enabled or root.cas.cas_enabled or root.jwt.jwt_enabled ): raise ConfigError("SSO cannot be enabled when OAuth delegation is enabled") if bool(root.authproviders.password_providers): raise ConfigError( "Password auth providers cannot be enabled when OAuth delegation is enabled" ) if root.captcha.enable_registration_captcha: raise ConfigError( "CAPTCHA cannot be enabled when OAuth delegation is enabled", ("captcha", "enable_registration_captcha"), ) if root.auth.login_via_existing_enabled: raise ConfigError( "Login via existing session cannot be enabled when OAuth delegation is enabled", ("login_via_existing_session", "enabled"), ) if root.registration.refresh_token_lifetime: raise ConfigError( "refresh_token_lifetime cannot be set when OAuth delegation is enabled", ("refresh_token_lifetime",), ) if root.registration.nonrefreshable_access_token_lifetime: raise ConfigError( "nonrefreshable_access_token_lifetime cannot be set when OAuth delegation is enabled", ("nonrefreshable_access_token_lifetime",), ) if root.registration.session_lifetime: raise ConfigError( "session_lifetime cannot be set when OAuth delegation is enabled", ("session_lifetime",), ) if root.registration.enable_3pid_changes: raise ConfigError( "enable_3pid_changes cannot be enabled when OAuth delegation is enabled", ("enable_3pid_changes",), ) @attr.s(auto_attribs=True, frozen=True, slots=True) class MSC3866Config: """Configuration for MSC3866 (mandating approval for new users)""" # Whether the base support for the approval process is enabled. This includes the # ability for administrators to check and update the approval of users, even if no # approval is currently required. enabled: bool = False # Whether to require that new users are approved by an admin before their account # can be used. Note that this setting is ignored if 'enabled' is false. require_approval_for_new_accounts: bool = False class ExperimentalConfig(Config): """Config section for enabling experimental features""" section = "experimental" def read_config(self, config: JsonDict, **kwargs: Any) -> None: experimental = config.get("experimental_features") or {} # MSC3026 (busy presence state) self.msc3026_enabled: bool = experimental.get("msc3026_enabled", False) # MSC2697 (device dehydration) # Enabled by default since this option was added after adding the feature. # It is not recommended that both MSC2697 and MSC3814 both be enabled at # once. self.msc2697_enabled: bool = experimental.get("msc2697_enabled", True) # MSC3814 (dehydrated devices with SSSS) # This is an alternative method to achieve the same goals as MSC2697. # It is not recommended that both MSC2697 and MSC3814 both be enabled at # once. self.msc3814_enabled: bool = experimental.get("msc3814_enabled", False) if self.msc2697_enabled and self.msc3814_enabled: raise ConfigError( "MSC2697 and MSC3814 should not both be enabled.", ( "experimental_features", "msc3814_enabled", ), ) # MSC3244 (room version capabilities) self.msc3244_enabled: bool = experimental.get("msc3244_enabled", True) # MSC3266 (room summary api) self.msc3266_enabled: bool = experimental.get("msc3266_enabled", False) # MSC2409 (this setting only relates to optionally sending to-device messages). # Presence, typing and read receipt EDUs are already sent to application services that # have opted in to receive them. If enabled, this adds to-device messages to that list. self.msc2409_to_device_messages_enabled: bool = experimental.get( "msc2409_to_device_messages_enabled", False ) # The portion of MSC3202 which is related to device masquerading. self.msc3202_device_masquerading_enabled: bool = experimental.get( "msc3202_device_masquerading", False ) # The portion of MSC3202 related to transaction extensions: # sending device list changes, one-time key counts and fallback key # usage to application services. self.msc3202_transaction_extensions: bool = experimental.get( "msc3202_transaction_extensions", False ) # MSC3983: Proxying OTK claim requests to exclusive ASes. self.msc3983_appservice_otk_claims: bool = experimental.get( "msc3983_appservice_otk_claims", False ) # MSC3984: Proxying key queries to exclusive ASes. self.msc3984_appservice_key_query: bool = experimental.get( "msc3984_appservice_key_query", False ) # MSC3720 (Account status endpoint) self.msc3720_enabled: bool = experimental.get("msc3720_enabled", False) # MSC2654: Unread counts # # Note that enabling this will result in an incorrect unread count for # previously calculated push actions. self.msc2654_enabled: bool = experimental.get("msc2654_enabled", False) # MSC2815 (allow room moderators to view redacted event content) self.msc2815_enabled: bool = experimental.get("msc2815_enabled", False) # MSC3391: Removing account data. self.msc3391_enabled = experimental.get("msc3391_enabled", False) # MSC3773: Thread notifications self.msc3773_enabled: bool = experimental.get("msc3773_enabled", False) # MSC3664: Pushrules to match on related events self.msc3664_enabled: bool = experimental.get("msc3664_enabled", False) # MSC3848: Introduce errcodes for specific event sending failures self.msc3848_enabled: bool = experimental.get("msc3848_enabled", False) # MSC3852: Expose last seen user agent field on /_matrix/client/v3/devices. self.msc3852_enabled: bool = experimental.get("msc3852_enabled", False) # MSC3866: M_USER_AWAITING_APPROVAL error code raw_msc3866_config = experimental.get("msc3866", {}) self.msc3866 = MSC3866Config(**raw_msc3866_config) # MSC3881: Remotely toggle push notifications for another client self.msc3881_enabled: bool = experimental.get("msc3881_enabled", False) # MSC3874: Filtering /messages with rel_types / not_rel_types. self.msc3874_enabled: bool = experimental.get("msc3874_enabled", False) # MSC3886: Simple client rendezvous capability self.msc3886_endpoint: Optional[str] = experimental.get( "msc3886_endpoint", None ) # MSC3890: Remotely silence local notifications # Note: This option requires "experimental_features.msc3391_enabled" to be # set to "true", in order to communicate account data deletions to clients. self.msc3890_enabled: bool = experimental.get("msc3890_enabled", False) if self.msc3890_enabled and not self.msc3391_enabled: raise ConfigError( "Option 'experimental_features.msc3391' must be set to 'true' to " "enable 'experimental_features.msc3890'. MSC3391 functionality is " "required to communicate account data deletions to clients." ) # MSC3381: Polls. # In practice, supporting polls in Synapse only requires an implementation of # MSC3930: Push rules for MSC3391 polls; which is what this option enables. self.msc3381_polls_enabled: bool = experimental.get( "msc3381_polls_enabled", False ) # MSC3912: Relation-based redactions. self.msc3912_enabled: bool = experimental.get("msc3912_enabled", False) # MSC1767 and friends: Extensible Events self.msc1767_enabled: bool = experimental.get("msc1767_enabled", False) if self.msc1767_enabled: # Enable room version (and thus applicable push rules from MSC3931/3932) version_id = RoomVersions.MSC1767v10.identifier KNOWN_ROOM_VERSIONS[version_id] = RoomVersions.MSC1767v10 # MSC3391: Removing account data. self.msc3391_enabled = experimental.get("msc3391_enabled", False) # MSC3959: Do not generate notifications for edits. self.msc3958_supress_edit_notifs = experimental.get( "msc3958_supress_edit_notifs", False ) # MSC3967: Do not require UIA when first uploading cross signing keys self.msc3967_enabled = experimental.get("msc3967_enabled", False) # MSC3981: Recurse relations self.msc3981_recurse_relations = experimental.get( "msc3981_recurse_relations", False ) # MSC3861: Matrix architecture change to delegate authentication via OIDC try: self.msc3861 = MSC3861(**experimental.get("msc3861", {})) except ValueError as exc: raise ConfigError( "Invalid MSC3861 configuration", ("experimental", "msc3861") ) from exc # Check that none of the other config options conflict with MSC3861 when enabled self.msc3861.check_config_conflicts(self.root) # MSC4010: Do not allow setting m.push_rules account data. self.msc4010_push_rules_account_data = experimental.get( "msc4010_push_rules_account_data", False )