mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-10-01 11:49:51 -04:00
242 lines
9.0 KiB
Python
242 lines
9.0 KiB
Python
# Copyright 2018 New Vector Ltd
|
|
# Copyright 2019-2021 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 logging
|
|
from typing import Any, List, Set
|
|
|
|
from synapse.config.sso import SsoAttributeRequirement
|
|
from synapse.types import JsonDict
|
|
from synapse.util.check_dependencies import DependencyException, check_requirements
|
|
from synapse.util.module_loader import load_module, load_python_module
|
|
|
|
from ._base import Config, ConfigError
|
|
from ._util import validate_config
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
DEFAULT_USER_MAPPING_PROVIDER = "synapse.handlers.saml.DefaultSamlMappingProvider"
|
|
# The module that DefaultSamlMappingProvider is in was renamed, we want to
|
|
# transparently handle both the same.
|
|
LEGACY_USER_MAPPING_PROVIDER = (
|
|
"synapse.handlers.saml_handler.DefaultSamlMappingProvider"
|
|
)
|
|
|
|
|
|
def _dict_merge(merge_dict: dict, into_dict: dict) -> None:
|
|
"""Do a deep merge of two dicts
|
|
|
|
Recursively merges `merge_dict` into `into_dict`:
|
|
* For keys where both `merge_dict` and `into_dict` have a dict value, the values
|
|
are recursively merged
|
|
* For all other keys, the values in `into_dict` (if any) are overwritten with
|
|
the value from `merge_dict`.
|
|
|
|
Args:
|
|
merge_dict: dict to merge
|
|
into_dict: target dict to be modified
|
|
"""
|
|
for k, v in merge_dict.items():
|
|
if k not in into_dict:
|
|
into_dict[k] = v
|
|
continue
|
|
|
|
current_val = into_dict[k]
|
|
|
|
if isinstance(v, dict) and isinstance(current_val, dict):
|
|
_dict_merge(v, current_val)
|
|
continue
|
|
|
|
# otherwise we just overwrite
|
|
into_dict[k] = v
|
|
|
|
|
|
class SAML2Config(Config):
|
|
section = "saml2"
|
|
|
|
def read_config(self, config: JsonDict, **kwargs: Any) -> None:
|
|
self.saml2_enabled = False
|
|
|
|
saml2_config = config.get("saml2_config")
|
|
|
|
if not saml2_config or not saml2_config.get("enabled", True):
|
|
return
|
|
|
|
if not saml2_config.get("sp_config") and not saml2_config.get("config_path"):
|
|
return
|
|
|
|
try:
|
|
check_requirements("saml2")
|
|
except DependencyException as e:
|
|
raise ConfigError(
|
|
e.message # noqa: B306, DependencyException.message is a property
|
|
)
|
|
|
|
self.saml2_enabled = True
|
|
|
|
attribute_requirements = saml2_config.get("attribute_requirements") or []
|
|
self.attribute_requirements = _parse_attribute_requirements_def(
|
|
attribute_requirements
|
|
)
|
|
|
|
self.saml2_grandfathered_mxid_source_attribute = saml2_config.get(
|
|
"grandfathered_mxid_source_attribute", "uid"
|
|
)
|
|
|
|
self.saml2_idp_entityid = saml2_config.get("idp_entityid", None)
|
|
|
|
# user_mapping_provider may be None if the key is present but has no value
|
|
ump_dict = saml2_config.get("user_mapping_provider") or {}
|
|
|
|
# Use the default user mapping provider if not set
|
|
ump_dict.setdefault("module", DEFAULT_USER_MAPPING_PROVIDER)
|
|
if ump_dict.get("module") == LEGACY_USER_MAPPING_PROVIDER:
|
|
ump_dict["module"] = DEFAULT_USER_MAPPING_PROVIDER
|
|
|
|
# Ensure a config is present
|
|
ump_dict["config"] = ump_dict.get("config") or {}
|
|
|
|
if ump_dict["module"] == DEFAULT_USER_MAPPING_PROVIDER:
|
|
# Load deprecated options for use by the default module
|
|
old_mxid_source_attribute = saml2_config.get("mxid_source_attribute")
|
|
if old_mxid_source_attribute:
|
|
logger.warning(
|
|
"The config option saml2_config.mxid_source_attribute is deprecated. "
|
|
"Please use saml2_config.user_mapping_provider.config"
|
|
".mxid_source_attribute instead."
|
|
)
|
|
ump_dict["config"]["mxid_source_attribute"] = old_mxid_source_attribute
|
|
|
|
old_mxid_mapping = saml2_config.get("mxid_mapping")
|
|
if old_mxid_mapping:
|
|
logger.warning(
|
|
"The config option saml2_config.mxid_mapping is deprecated. Please "
|
|
"use saml2_config.user_mapping_provider.config.mxid_mapping instead."
|
|
)
|
|
ump_dict["config"]["mxid_mapping"] = old_mxid_mapping
|
|
|
|
# Retrieve an instance of the module's class
|
|
# Pass the config dictionary to the module for processing
|
|
(
|
|
self.saml2_user_mapping_provider_class,
|
|
self.saml2_user_mapping_provider_config,
|
|
) = load_module(ump_dict, ("saml2_config", "user_mapping_provider"))
|
|
|
|
# Ensure loaded user mapping module has defined all necessary methods
|
|
# Note parse_config() is already checked during the call to load_module
|
|
required_methods = [
|
|
"get_saml_attributes",
|
|
"saml_response_to_user_attributes",
|
|
"get_remote_user_id",
|
|
]
|
|
missing_methods = [
|
|
method
|
|
for method in required_methods
|
|
if not hasattr(self.saml2_user_mapping_provider_class, method)
|
|
]
|
|
if missing_methods:
|
|
raise ConfigError(
|
|
"Class specified by saml2_config."
|
|
"user_mapping_provider.module is missing required "
|
|
"methods: %s" % (", ".join(missing_methods),)
|
|
)
|
|
|
|
# Get the desired saml auth response attributes from the module
|
|
saml2_config_dict = self._default_saml_config_dict(
|
|
*self.saml2_user_mapping_provider_class.get_saml_attributes(
|
|
self.saml2_user_mapping_provider_config
|
|
)
|
|
)
|
|
_dict_merge(
|
|
merge_dict=saml2_config.get("sp_config", {}), into_dict=saml2_config_dict
|
|
)
|
|
|
|
config_path = saml2_config.get("config_path", None)
|
|
if config_path is not None:
|
|
mod = load_python_module(config_path)
|
|
config_dict_from_file = getattr(mod, "CONFIG", None)
|
|
if config_dict_from_file is None:
|
|
raise ConfigError(
|
|
"Config path specified by saml2_config.config_path does not "
|
|
"have a CONFIG property."
|
|
)
|
|
_dict_merge(merge_dict=config_dict_from_file, into_dict=saml2_config_dict)
|
|
|
|
import saml2.config
|
|
|
|
self.saml2_sp_config = saml2.config.SPConfig()
|
|
self.saml2_sp_config.load(saml2_config_dict)
|
|
|
|
# session lifetime: in milliseconds
|
|
self.saml2_session_lifetime = self.parse_duration(
|
|
saml2_config.get("saml_session_lifetime", "15m")
|
|
)
|
|
|
|
def _default_saml_config_dict(
|
|
self, required_attributes: Set[str], optional_attributes: Set[str]
|
|
) -> JsonDict:
|
|
"""Generate a configuration dictionary with required and optional attributes that
|
|
will be needed to process new user registration
|
|
|
|
Args:
|
|
required_attributes: SAML auth response attributes that are
|
|
necessary to function
|
|
optional_attributes: SAML auth response attributes that can be used to add
|
|
additional information to Synapse user accounts, but are not required
|
|
|
|
Returns:
|
|
A SAML configuration dictionary
|
|
"""
|
|
import saml2
|
|
|
|
if self.saml2_grandfathered_mxid_source_attribute:
|
|
optional_attributes.add(self.saml2_grandfathered_mxid_source_attribute)
|
|
optional_attributes -= required_attributes
|
|
|
|
public_baseurl = self.root.server.public_baseurl
|
|
metadata_url = public_baseurl + "_synapse/client/saml2/metadata.xml"
|
|
response_url = public_baseurl + "_synapse/client/saml2/authn_response"
|
|
return {
|
|
"entityid": metadata_url,
|
|
"service": {
|
|
"sp": {
|
|
"endpoints": {
|
|
"assertion_consumer_service": [
|
|
(response_url, saml2.BINDING_HTTP_POST)
|
|
]
|
|
},
|
|
"required_attributes": list(required_attributes),
|
|
"optional_attributes": list(optional_attributes),
|
|
# "name_id_format": saml2.saml.NAMEID_FORMAT_PERSISTENT,
|
|
}
|
|
},
|
|
}
|
|
|
|
|
|
ATTRIBUTE_REQUIREMENTS_SCHEMA = {
|
|
"type": "array",
|
|
"items": SsoAttributeRequirement.JSON_SCHEMA,
|
|
}
|
|
|
|
|
|
def _parse_attribute_requirements_def(
|
|
attribute_requirements: Any,
|
|
) -> List[SsoAttributeRequirement]:
|
|
validate_config(
|
|
ATTRIBUTE_REQUIREMENTS_SCHEMA,
|
|
attribute_requirements,
|
|
config_path=("saml2_config", "attribute_requirements"),
|
|
)
|
|
return [SsoAttributeRequirement(**x) for x in attribute_requirements]
|