277 lines
13 KiB
Python
277 lines
13 KiB
Python
# Copyright 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import Any, Dict, Optional
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import attr
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from ._base import Config
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@attr.s(frozen=True)
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class SsoAttributeRequirement:
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"""Object describing a single requirement for SSO attributes."""
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attribute = attr.ib(type=str)
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# If a value is not given, than the attribute must simply exist.
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value = attr.ib(type=Optional[str])
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JSON_SCHEMA = {
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"type": "object",
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"properties": {"attribute": {"type": "string"}, "value": {"type": "string"}},
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"required": ["attribute", "value"],
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}
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class SSOConfig(Config):
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"""SSO Configuration"""
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section = "sso"
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def read_config(self, config, **kwargs):
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sso_config = config.get("sso") or {} # type: Dict[str, Any]
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# The sso-specific template_dir
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self.sso_template_dir = sso_config.get("template_dir")
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# Read templates from disk
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(
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self.sso_login_idp_picker_template,
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self.sso_redirect_confirm_template,
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self.sso_auth_confirm_template,
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self.sso_error_template,
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sso_account_deactivated_template,
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sso_auth_success_template,
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self.sso_auth_bad_user_template,
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) = self.read_templates(
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[
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"sso_login_idp_picker.html",
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"sso_redirect_confirm.html",
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"sso_auth_confirm.html",
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"sso_error.html",
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"sso_account_deactivated.html",
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"sso_auth_success.html",
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"sso_auth_bad_user.html",
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],
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self.sso_template_dir,
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)
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# These templates have no placeholders, so render them here
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self.sso_account_deactivated_template = (
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sso_account_deactivated_template.render()
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)
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self.sso_auth_success_template = sso_auth_success_template.render()
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self.sso_client_whitelist = sso_config.get("client_whitelist") or []
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# Attempt to also whitelist the server's login fallback, since that fallback sets
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# the redirect URL to itself (so it can process the login token then return
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# gracefully to the client). This would make it pointless to ask the user for
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# confirmation, since the URL the confirmation page would be showing wouldn't be
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# the client's.
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# public_baseurl is an optional setting, so we only add the fallback's URL to the
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# list if it's provided (because we can't figure out what that URL is otherwise).
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if self.public_baseurl:
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login_fallback_url = self.public_baseurl + "_matrix/static/client/login"
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self.sso_client_whitelist.append(login_fallback_url)
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def generate_config_section(self, **kwargs):
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return """\
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# Additional settings to use with single-sign on systems such as OpenID Connect,
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# SAML2 and CAS.
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#
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sso:
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# A list of client URLs which are whitelisted so that the user does not
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# have to confirm giving access to their account to the URL. Any client
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# whose URL starts with an entry in the following list will not be subject
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# to an additional confirmation step after the SSO login is completed.
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#
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# WARNING: An entry such as "https://my.client" is insecure, because it
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# will also match "https://my.client.evil.site", exposing your users to
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# phishing attacks from evil.site. To avoid this, include a slash after the
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# hostname: "https://my.client/".
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#
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# If public_baseurl is set, then the login fallback page (used by clients
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# that don't natively support the required login flows) is whitelisted in
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# addition to any URLs in this list.
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#
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# By default, this list is empty.
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#
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#client_whitelist:
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# - https://riot.im/develop
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# - https://my.custom.client/
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# Directory in which Synapse will try to find the template files below.
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# If not set, or the files named below are not found within the template
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# directory, default templates from within the Synapse package will be used.
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#
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# Synapse will look for the following templates in this directory:
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#
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# * HTML page to prompt the user to choose an Identity Provider during
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# login: 'sso_login_idp_picker.html'.
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#
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# This is only used if multiple SSO Identity Providers are configured.
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#
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# When rendering, this template is given the following variables:
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# * redirect_url: the URL that the user will be redirected to after
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# login.
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#
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# * server_name: the homeserver's name.
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#
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# * providers: a list of available Identity Providers. Each element is
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# an object with the following attributes:
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#
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# * idp_id: unique identifier for the IdP
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# * idp_name: user-facing name for the IdP
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# * idp_icon: if specified in the IdP config, an MXC URI for an icon
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# for the IdP
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# * idp_brand: if specified in the IdP config, a textual identifier
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# for the brand of the IdP
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#
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# The rendered HTML page should contain a form which submits its results
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# back as a GET request, with the following query parameters:
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#
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# * redirectUrl: the client redirect URI (ie, the `redirect_url` passed
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# to the template)
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#
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# * idp: the 'idp_id' of the chosen IDP.
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#
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# * HTML page to prompt new users to enter a userid and confirm other
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# details: 'sso_auth_account_details.html'. This is only shown if the
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# SSO implementation (with any user_mapping_provider) does not return
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# a localpart.
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#
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# When rendering, this template is given the following variables:
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#
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# * server_name: the homeserver's name.
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#
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# * idp: details of the SSO Identity Provider that the user logged in
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# with: an object with the following attributes:
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#
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# * idp_id: unique identifier for the IdP
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# * idp_name: user-facing name for the IdP
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# * idp_icon: if specified in the IdP config, an MXC URI for an icon
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# for the IdP
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# * idp_brand: if specified in the IdP config, a textual identifier
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# for the brand of the IdP
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#
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# * user_attributes: an object containing details about the user that
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# we received from the IdP. May have the following attributes:
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#
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# * display_name: the user's display_name
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# * emails: a list of email addresses
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#
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# The template should render a form which submits the following fields:
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#
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# * username: the localpart of the user's chosen user id
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#
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# * HTML page allowing the user to consent to the server's terms and
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# conditions. This is only shown for new users, and only if
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# `user_consent.require_at_registration` is set.
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#
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# When rendering, this template is given the following variables:
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#
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# * server_name: the homeserver's name.
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#
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# * user_id: the user's matrix proposed ID.
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#
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# * user_profile.display_name: the user's proposed display name, if any.
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#
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# * consent_version: the version of the terms that the user will be
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# shown
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#
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# * terms_url: a link to the page showing the terms.
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#
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# The template should render a form which submits the following fields:
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#
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# * accepted_version: the version of the terms accepted by the user
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# (ie, 'consent_version' from the input variables).
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#
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# * HTML page for a confirmation step before redirecting back to the client
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# with the login token: 'sso_redirect_confirm.html'.
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#
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# When rendering, this template is given the following variables:
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#
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# * redirect_url: the URL the user is about to be redirected to.
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#
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# * display_url: the same as `redirect_url`, but with the query
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# parameters stripped. The intention is to have a
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# human-readable URL to show to users, not to use it as
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# the final address to redirect to.
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#
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# * server_name: the homeserver's name.
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#
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# * new_user: a boolean indicating whether this is the user's first time
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# logging in.
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#
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# * user_id: the user's matrix ID.
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#
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# * user_profile.avatar_url: an MXC URI for the user's avatar, if any.
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# None if the user has not set an avatar.
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#
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# * user_profile.display_name: the user's display name. None if the user
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# has not set a display name.
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#
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# * HTML page which notifies the user that they are authenticating to confirm
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# an operation on their account during the user interactive authentication
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# process: 'sso_auth_confirm.html'.
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#
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# When rendering, this template is given the following variables:
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# * redirect_url: the URL the user is about to be redirected to.
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#
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# * description: the operation which the user is being asked to confirm
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#
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# * idp: details of the Identity Provider that we will use to confirm
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# the user's identity: an object with the following attributes:
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#
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# * idp_id: unique identifier for the IdP
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# * idp_name: user-facing name for the IdP
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# * idp_icon: if specified in the IdP config, an MXC URI for an icon
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# for the IdP
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# * idp_brand: if specified in the IdP config, a textual identifier
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# for the brand of the IdP
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#
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# * HTML page shown after a successful user interactive authentication session:
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# 'sso_auth_success.html'.
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#
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# Note that this page must include the JavaScript which notifies of a successful authentication
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# (see https://matrix.org/docs/spec/client_server/r0.6.0#fallback).
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#
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# This template has no additional variables.
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#
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# * HTML page shown after a user-interactive authentication session which
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# does not map correctly onto the expected user: 'sso_auth_bad_user.html'.
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#
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# When rendering, this template is given the following variables:
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# * server_name: the homeserver's name.
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# * user_id_to_verify: the MXID of the user that we are trying to
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# validate.
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#
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# * HTML page shown during single sign-on if a deactivated user (according to Synapse's database)
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# attempts to login: 'sso_account_deactivated.html'.
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#
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# This template has no additional variables.
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#
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# * HTML page to display to users if something goes wrong during the
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# OpenID Connect authentication process: 'sso_error.html'.
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#
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# When rendering, this template is given two variables:
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# * error: the technical name of the error
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# * error_description: a human-readable message for the error
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#
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# You can see the default templates at:
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# https://github.com/matrix-org/synapse/tree/master/synapse/res/templates
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#
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#template_dir: "res/templates"
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"""
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