Implement SAML2 authentication (#4267)

This implements both a SAML2 metadata endpoint (at
`/_matrix/saml2/metadata.xml`), and a SAML2 response receiver (at
`/_matrix/saml2/authn_response`). If the SAML2 response matches what's been
configured, we complete the SSO login flow by redirecting to the client url
(aka `RelayState` in SAML2 jargon) with a login token.

What we don't yet have is anything to build a SAML2 request and redirect the
user to the identity provider. That is left as an exercise for the reader.

1 files changed, 29 insertions, 0 deletions

diff --git a/synapse/rest/saml2/__init__.py b/synapse/rest/saml2/__init__.py
new file mode 100644
index 0000000000..68da37ca6a
--- /dev/null
+++ b/synapse/rest/saml2/__init__.py
@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+# Copyright 2018 New Vector Ltd
+#
+# 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 twisted.web.resource import Resource
+
+from synapse.rest.saml2.metadata_resource import SAML2MetadataResource
+from synapse.rest.saml2.response_resource import SAML2ResponseResource
+
+logger = logging.getLogger(__name__)
+
+
+class SAML2Resource(Resource):
+    def __init__(self, hs):
+        Resource.__init__(self)
+        self.putChild(b"metadata.xml", SAML2MetadataResource(hs))
+        self.putChild(b"authn_response", SAML2ResponseResource(hs))