mirror of
https://mau.dev/maunium/synapse.git
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266 lines
10 KiB
Python
266 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 OpenMarket Ltd
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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 twisted.internet import defer
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from synapse.api.errors import SynapseError, LoginError, Codes
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from synapse.http.client import SimpleHttpClient
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from synapse.types import UserID
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from base import ClientV1RestServlet, client_path_pattern
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import simplejson as json
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import urllib
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import logging
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from saml2 import BINDING_HTTP_POST
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from saml2 import config
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from saml2.client import Saml2Client
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import xml.etree.ElementTree as ET
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logger = logging.getLogger(__name__)
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class LoginRestServlet(ClientV1RestServlet):
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PATTERN = client_path_pattern("/login$")
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PASS_TYPE = "m.login.password"
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SAML2_TYPE = "m.login.saml2"
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CAS_TYPE = "m.login.cas"
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def __init__(self, hs):
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super(LoginRestServlet, self).__init__(hs)
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self.idp_redirect_url = hs.config.saml2_idp_redirect_url
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self.saml2_enabled = hs.config.saml2_enabled
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self.cas_enabled = hs.config.cas_enabled
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self.cas_server_url = hs.config.cas_server_url
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self.cas_required_attributes = hs.config.cas_required_attributes
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self.servername = hs.config.server_name
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def on_GET(self, request):
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flows = [{"type": LoginRestServlet.PASS_TYPE}]
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if self.saml2_enabled:
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flows.append({"type": LoginRestServlet.SAML2_TYPE})
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if self.cas_enabled:
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flows.append({"type": LoginRestServlet.CAS_TYPE})
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return (200, {"flows": flows})
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def on_OPTIONS(self, request):
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return (200, {})
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@defer.inlineCallbacks
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def on_POST(self, request):
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login_submission = _parse_json(request)
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try:
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if login_submission["type"] == LoginRestServlet.PASS_TYPE:
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result = yield self.do_password_login(login_submission)
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defer.returnValue(result)
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elif self.saml2_enabled and (login_submission["type"] ==
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LoginRestServlet.SAML2_TYPE):
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relay_state = ""
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if "relay_state" in login_submission:
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relay_state = "&RelayState="+urllib.quote(
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login_submission["relay_state"])
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result = {
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"uri": "%s%s" % (self.idp_redirect_url, relay_state)
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}
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defer.returnValue((200, result))
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elif self.cas_enabled and (login_submission["type"] ==
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LoginRestServlet.CAS_TYPE):
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# TODO: get this from the homeserver rather than creating a new one for
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# each request
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http_client = SimpleHttpClient(self.hs)
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uri = "%s/proxyValidate" % (self.cas_server_url,)
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args = {
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"ticket": login_submission["ticket"],
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"service": login_submission["service"]
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}
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body = yield http_client.get_raw(uri, args)
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result = yield self.do_cas_login(body)
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defer.returnValue(result)
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else:
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raise SynapseError(400, "Bad login type.")
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except KeyError:
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raise SynapseError(400, "Missing JSON keys.")
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@defer.inlineCallbacks
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def do_password_login(self, login_submission):
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if 'medium' in login_submission and 'address' in login_submission:
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user_id = yield self.hs.get_datastore().get_user_id_by_threepid(
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login_submission['medium'], login_submission['address']
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)
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else:
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user_id = login_submission['user']
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if not user_id.startswith('@'):
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user_id = UserID.create(
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user_id, self.hs.hostname
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).to_string()
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auth_handler = self.handlers.auth_handler
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user_id, access_token, refresh_token = yield auth_handler.login_with_password(
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user_id=user_id,
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password=login_submission["password"])
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result = {
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"user_id": user_id, # may have changed
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"access_token": access_token,
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"refresh_token": refresh_token,
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"home_server": self.hs.hostname,
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}
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defer.returnValue((200, result))
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@defer.inlineCallbacks
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def do_cas_login(self, cas_response_body):
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user, attributes = self.parse_cas_response(cas_response_body)
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for required_attribute, required_value in self.cas_required_attributes.items():
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# If required attribute was not in CAS Response - Forbidden
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if required_attribute not in attributes:
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raise LoginError(401, "Unauthorized", errcode=Codes.UNAUTHORIZED)
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# Also need to check value
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if required_value is not None:
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actual_value = attributes[required_attribute]
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# If required attribute value does not match expected - Forbidden
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if required_value != actual_value:
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raise LoginError(401, "Unauthorized", errcode=Codes.UNAUTHORIZED)
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user_id = UserID.create(user, self.hs.hostname).to_string()
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auth_handler = self.handlers.auth_handler
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user_exists = yield auth_handler.does_user_exist(user_id)
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if user_exists:
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user_id, access_token, refresh_token = (
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yield auth_handler.login_with_cas_user_id(user_id)
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)
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result = {
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"user_id": user_id, # may have changed
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"access_token": access_token,
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"refresh_token": refresh_token,
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"home_server": self.hs.hostname,
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}
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else:
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user_id, access_token = (
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yield self.handlers.registration_handler.register(localpart=user)
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)
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result = {
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"user_id": user_id, # may have changed
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"access_token": access_token,
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"home_server": self.hs.hostname,
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}
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defer.returnValue((200, result))
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def parse_cas_response(self, cas_response_body):
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root = ET.fromstring(cas_response_body)
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if not root.tag.endswith("serviceResponse"):
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raise LoginError(401, "Invalid CAS response", errcode=Codes.UNAUTHORIZED)
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if not root[0].tag.endswith("authenticationSuccess"):
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raise LoginError(401, "Unsuccessful CAS response", errcode=Codes.UNAUTHORIZED)
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for child in root[0]:
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if child.tag.endswith("user"):
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user = child.text
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if child.tag.endswith("attributes"):
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attributes = {}
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for attribute in child:
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# ElementTree library expands the namespace in attribute tags
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# to the full URL of the namespace.
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# See (https://docs.python.org/2/library/xml.etree.elementtree.html)
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# We don't care about namespace here and it will always be encased in
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# curly braces, so we remove them.
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if "}" in attribute.tag:
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attributes[attribute.tag.split("}")[1]] = attribute.text
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else:
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attributes[attribute.tag] = attribute.text
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if user is None or attributes is None:
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raise LoginError(401, "Invalid CAS response", errcode=Codes.UNAUTHORIZED)
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return (user, attributes)
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class SAML2RestServlet(ClientV1RestServlet):
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PATTERN = client_path_pattern("/login/saml2")
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def __init__(self, hs):
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super(SAML2RestServlet, self).__init__(hs)
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self.sp_config = hs.config.saml2_config_path
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@defer.inlineCallbacks
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def on_POST(self, request):
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saml2_auth = None
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try:
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conf = config.SPConfig()
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conf.load_file(self.sp_config)
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SP = Saml2Client(conf)
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saml2_auth = SP.parse_authn_request_response(
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request.args['SAMLResponse'][0], BINDING_HTTP_POST)
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except Exception, e: # Not authenticated
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logger.exception(e)
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if saml2_auth and saml2_auth.status_ok() and not saml2_auth.not_signed:
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username = saml2_auth.name_id.text
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handler = self.handlers.registration_handler
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(user_id, token) = yield handler.register_saml2(username)
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# Forward to the RelayState callback along with ava
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if 'RelayState' in request.args:
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request.redirect(urllib.unquote(
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request.args['RelayState'][0]) +
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'?status=authenticated&access_token=' +
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token + '&user_id=' + user_id + '&ava=' +
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urllib.quote(json.dumps(saml2_auth.ava)))
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request.finish()
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defer.returnValue(None)
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defer.returnValue((200, {"status": "authenticated",
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"user_id": user_id, "token": token,
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"ava": saml2_auth.ava}))
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elif 'RelayState' in request.args:
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request.redirect(urllib.unquote(
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request.args['RelayState'][0]) +
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'?status=not_authenticated')
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request.finish()
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defer.returnValue(None)
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defer.returnValue((200, {"status": "not_authenticated"}))
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class CasRestServlet(ClientV1RestServlet):
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PATTERN = client_path_pattern("/login/cas")
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def __init__(self, hs):
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super(CasRestServlet, self).__init__(hs)
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self.cas_server_url = hs.config.cas_server_url
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def on_GET(self, request):
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return (200, {"serverUrl": self.cas_server_url})
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def _parse_json(request):
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try:
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content = json.loads(request.content.read())
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if type(content) != dict:
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raise SynapseError(400, "Content must be a JSON object.")
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return content
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except ValueError:
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raise SynapseError(400, "Content not JSON.")
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def register_servlets(hs, http_server):
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LoginRestServlet(hs).register(http_server)
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if hs.config.saml2_enabled:
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SAML2RestServlet(hs).register(http_server)
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if hs.config.cas_enabled:
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CasRestServlet(hs).register(http_server)
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# TODO PasswordResetRestServlet(hs).register(http_server)
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