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# Copyright 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 TYPE_CHECKING
from synapse.http.server import (
DirectServeHtmlResource,
finish_request,
respond_with_html,
)
from synapse.http.servlet import parse_string
from synapse.http.site import SynapseRequest
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class PickIdpResource(DirectServeHtmlResource):
"""IdP picker resource.
This resource gets mounted under /_synapse/client/pick_idp. It serves an HTML page
which prompts the user to choose an Identity Provider from the list.
"""
def __init__(self, hs: "HomeServer"):
super().__init__()
self._sso_handler = hs.get_sso_handler()
self._sso_login_idp_picker_template = (
hs.config.sso.sso_login_idp_picker_template
)
self._server_name = hs.hostname
async def _async_render_GET(self, request: SynapseRequest) -> None:
client_redirect_url = parse_string(
request, "redirectUrl", required=True, encoding="utf-8"
)
idp = parse_string(request, "idp", required=False)
# if we need to pick an IdP, do so
if not idp:
return await self._serve_id_picker(request, client_redirect_url)
# otherwise, redirect to the IdP's redirect URI
providers = self._sso_handler.get_identity_providers()
auth_provider = providers.get(idp)
if not auth_provider:
logger.info("Unknown idp %r", idp)
self._sso_handler.render_error(
request, "unknown_idp", "Unknown identity provider ID"
)
return
sso_url = await auth_provider.handle_redirect_request(
request, client_redirect_url.encode("utf8")
)
logger.info("Redirecting to %s", sso_url)
request.redirect(sso_url)
finish_request(request)
async def _serve_id_picker(
self, request: SynapseRequest, client_redirect_url: str
) -> None:
# otherwise, serve up the IdP picker
providers = self._sso_handler.get_identity_providers()
html = self._sso_login_idp_picker_template.render(
redirect_url=client_redirect_url,
server_name=self._server_name,
providers=providers.values(),
)
respond_with_html(request, 200, html)
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