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https://git.anonymousland.org/anonymousland/synapse.git
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5310808d3b
If a user tries to do UI Auth via SSO, but uses the wrong account on the SSO IdP, try to give them a better error. Previously, the UIA would claim to be successful, but then the operation in question would simply fail with "auth fail". Instead, serve up an error page which explains the failure.
190 lines
9.0 KiB
Python
190 lines
9.0 KiB
Python
# -*- coding: utf-8 -*-
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# 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
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from ._base import Config
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class SSOConfig(Config):
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"""SSO Configuration
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"""
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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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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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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. Needs manual escaping (see
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# https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
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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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# * idp_id: unique identifier for the IdP
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# * idp_name: user-facing name for 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 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 three variables:
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# * redirect_url: the URL the user is about to be redirected to. Needs
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# manual escaping (see
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# https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
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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. Needs manual escaping
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# (see https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
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#
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# * server_name: the homeserver's 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. Needs
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# manual escaping (see
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# https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
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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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# * 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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