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# -*- coding: utf-8 -*-
# Copyright 2020 Quentin Gliech
#
# 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 synapse.python_dependencies import DependencyException, check_requirements
from synapse.util.module_loader import load_module
from ._base import Config, ConfigError
DEFAULT_USER_MAPPING_PROVIDER = "synapse.handlers.oidc_handler.JinjaOidcMappingProvider"
class OIDCConfig(Config):
section = "oidc"
def read_config(self, config, **kwargs):
self.oidc_enabled = False
oidc_config = config.get("oidc_config")
if not oidc_config or not oidc_config.get("enabled", False):
return
try:
check_requirements("oidc")
except DependencyException as e:
raise ConfigError(e.message)
public_baseurl = self.public_baseurl
if public_baseurl is None:
raise ConfigError("oidc_config requires a public_baseurl to be set")
self.oidc_callback_url = public_baseurl + "_synapse/oidc/callback"
self.oidc_enabled = True
self.oidc_discover = oidc_config.get("discover", True)
self.oidc_issuer = oidc_config["issuer"]
self.oidc_client_id = oidc_config["client_id"]
self.oidc_client_secret = oidc_config["client_secret"]
self.oidc_client_auth_method = oidc_config.get(
"client_auth_method", "client_secret_basic"
)
self.oidc_scopes = oidc_config.get("scopes", ["openid"])
self.oidc_authorization_endpoint = oidc_config.get("authorization_endpoint")
self.oidc_token_endpoint = oidc_config.get("token_endpoint")
self.oidc_userinfo_endpoint = oidc_config.get("userinfo_endpoint")
self.oidc_jwks_uri = oidc_config.get("jwks_uri")
self.oidc_subject_claim = oidc_config.get("subject_claim", "sub")
self.oidc_skip_verification = oidc_config.get("skip_verification", False)
ump_config = oidc_config.get("user_mapping_provider", {})
ump_config.setdefault("module", DEFAULT_USER_MAPPING_PROVIDER)
ump_config.setdefault("config", {})
(
self.oidc_user_mapping_provider_class,
self.oidc_user_mapping_provider_config,
) = load_module(ump_config)
# Ensure loaded user mapping module has defined all necessary methods
required_methods = [
"get_remote_user_id",
"map_user_attributes",
]
missing_methods = [
method
for method in required_methods
if not hasattr(self.oidc_user_mapping_provider_class, method)
]
if missing_methods:
raise ConfigError(
"Class specified by oidc_config."
"user_mapping_provider.module is missing required "
"methods: %s" % (", ".join(missing_methods),)
)
def generate_config_section(self, config_dir_path, server_name, **kwargs):
return """\
# Enable OpenID Connect for registration and login. Uses authlib.
#
oidc_config:
# enable OpenID Connect. Defaults to false.
#
#enabled: true
# use the OIDC discovery mechanism to discover endpoints. Defaults to true.
#
#discover: true
# the OIDC issuer. Used to validate tokens and discover the providers endpoints. Required.
#
#issuer: "https://accounts.example.com/"
# oauth2 client id to use. Required.
#
#client_id: "provided-by-your-issuer"
# oauth2 client secret to use. Required.
#
#client_secret: "provided-by-your-issuer"
# auth method to use when exchanging the token.
# Valid values are "client_secret_basic" (default), "client_secret_post" and "none".
#
#client_auth_method: "client_secret_basic"
# list of scopes to ask. This should include the "openid" scope. Defaults to ["openid"].
#
#scopes: ["openid"]
# the oauth2 authorization endpoint. Required if provider discovery is disabled.
#
#authorization_endpoint: "https://accounts.example.com/oauth2/auth"
# the oauth2 token endpoint. Required if provider discovery is disabled.
#
#token_endpoint: "https://accounts.example.com/oauth2/token"
# the OIDC userinfo endpoint. Required if discovery is disabled and the "openid" scope is not asked.
#
#userinfo_endpoint: "https://accounts.example.com/userinfo"
# URI where to fetch the JWKS. Required if discovery is disabled and the "openid" scope is used.
#
#jwks_uri: "https://accounts.example.com/.well-known/jwks.json"
# skip metadata verification. Defaults to false.
# Use this if you are connecting to a provider that is not OpenID Connect compliant.
# Avoid this in production.
#
#skip_verification: false
# An external module can be provided here as a custom solution to mapping
# attributes returned from a OIDC provider onto a matrix user.
#
user_mapping_provider:
# The custom module's class. Uncomment to use a custom module.
# Default is {mapping_provider!r}.
#
#module: mapping_provider.OidcMappingProvider
# Custom configuration values for the module. Below options are intended
# for the built-in provider, they should be changed if using a custom
# module. This section will be passed as a Python dictionary to the
# module's `parse_config` method.
#
# Below is the config of the default mapping provider, based on Jinja2
# templates. Those templates are used to render user attributes, where the
# userinfo object is available through the `user` variable.
#
config:
# name of the claim containing a unique identifier for the user.
# Defaults to `sub`, which OpenID Connect compliant providers should provide.
#
#subject_claim: "sub"
# Jinja2 template for the localpart of the MXID
#
localpart_template: "{{{{ user.preferred_username }}}}"
# Jinja2 template for the display name to set on first login. Optional.
#
#display_name_template: "{{{{ user.given_name }}}} {{{{ user.last_name }}}}"
""".format(
mapping_provider=DEFAULT_USER_MAPPING_PROVIDER
)
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