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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_skip_verification = oidc_config.get("skip_verification", False)
self.oidc_user_profile_method = oidc_config.get("user_profile_method", "auto")
self.oidc_allow_existing_users = oidc_config.get("allow_existing_users", 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 """\
# OpenID Connect integration. The following settings can be used to make Synapse
# use an OpenID Connect Provider for authentication, instead of its internal
# password database.
#
# See https://github.com/matrix-org/synapse/blob/master/docs/openid.md.
#
oidc_config:
# Uncomment the following to enable authorization against an OpenID Connect
# server. Defaults to false.
#
#enabled: true
# Uncomment the following to disable use of the OIDC discovery mechanism to
# discover endpoints. Defaults to true.
#
#discover: false
# the OIDC issuer. Used to validate tokens and (if discovery is enabled) to
# discover the provider's endpoints.
#
# Required if 'enabled' is true.
#
#issuer: "https://accounts.example.com/"
# oauth2 client id to use.
#
# Required if 'enabled' is true.
#
#client_id: "provided-by-your-issuer"
# oauth2 client secret to use.
#
# Required if 'enabled' is true.
#
#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_post
# list of scopes to request. This should normally include the "openid" scope.
# Defaults to ["openid"].
#
#scopes: ["openid", "profile"]
# 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 requested.
#
#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"
# Uncomment to 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: true
# Whether to fetch the user profile from the userinfo endpoint. Valid
# values are: "auto" or "userinfo_endpoint".
#
# Defaults to "auto", which fetches the userinfo endpoint if "openid" is included
# in `scopes`. Uncomment the following to always fetch the userinfo endpoint.
#
#user_profile_method: "userinfo_endpoint"
# Uncomment to allow a user logging in via OIDC to match a pre-existing account instead
# of failing. This could be used if switching from password logins to OIDC. Defaults to false.
#
#allow_existing_users: true
# 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}.
#
# See https://github.com/matrix-org/synapse/blob/master/docs/sso_mapping_providers.md#openid-mapping-providers
# for information on implementing a custom mapping provider.
#
#module: mapping_provider.OidcMappingProvider
# Custom configuration values for the module. This section will be passed as
# a Python dictionary to the user mapping provider module's `parse_config`
# method.
#
# The examples below are intended for the default provider: they should be
# changed if using a custom provider.
#
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.
#
# When rendering, this template is given the following variables:
# * user: The claims returned by the UserInfo Endpoint and/or in the ID
# Token
#
# This must be configured if using the default mapping provider.
#
localpart_template: "{{{{ user.preferred_username }}}}"
# Jinja2 template for the display name to set on first login.
#
# If unset, no displayname will be set.
#
#display_name_template: "{{{{ user.given_name }}}} {{{{ user.last_name }}}}"
# Jinja2 templates for extra attributes to send back to the client during
# login.
#
# Note that these are non-standard and clients will ignore them without modifications.
#
#extra_attributes:
#birthdate: "{{{{ user.birthdate }}}}"
""".format(
mapping_provider=DEFAULT_USER_MAPPING_PROVIDER
)
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