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authorPatrick Cloke <clokep@users.noreply.github.com>2020-04-03 15:35:05 -0400
committerGitHub <noreply@github.com>2020-04-03 15:35:05 -0400
commit694d8bed0e56366f080a49db0f930d635ca6cdf4 (patch)
treeb4a5fddf3cb5d5ae124bba9788483b6477fc1747 /synapse/rest
parentExtend web_client_location to handle absolute URLs (#7006) (diff)
downloadsynapse-694d8bed0e56366f080a49db0f930d635ca6cdf4.tar.xz
Support CAS in UI Auth flows. (#7186)
Diffstat (limited to 'synapse/rest')
-rw-r--r--synapse/rest/client/v1/login.py20
-rw-r--r--synapse/rest/client/v2_alpha/auth.py28
2 files changed, 39 insertions, 9 deletions
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index 59593cbf6e..4de2f97d06 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -425,7 +425,9 @@ class CasRedirectServlet(BaseSSORedirectServlet):
         self._cas_handler = hs.get_cas_handler()
 
     def get_sso_url(self, client_redirect_url: bytes) -> bytes:
-        return self._cas_handler.handle_redirect_request(client_redirect_url)
+        return self._cas_handler.get_redirect_url(
+            {"redirectUrl": client_redirect_url}
+        ).encode("ascii")
 
 
 class CasTicketServlet(RestServlet):
@@ -436,10 +438,20 @@ class CasTicketServlet(RestServlet):
         self._cas_handler = hs.get_cas_handler()
 
     async def on_GET(self, request: SynapseRequest) -> None:
-        client_redirect_url = parse_string(request, "redirectUrl", required=True)
+        client_redirect_url = parse_string(request, "redirectUrl")
         ticket = parse_string(request, "ticket", required=True)
-        await self._cas_handler.handle_ticket_request(
-            request, client_redirect_url, ticket
+
+        # Maybe get a session ID (if this ticket is from user interactive
+        # authentication).
+        session = parse_string(request, "session")
+
+        # Either client_redirect_url or session must be provided.
+        if not client_redirect_url and not session:
+            message = "Missing string query parameter redirectUrl or session"
+            raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
+
+        await self._cas_handler.handle_ticket(
+            request, ticket, client_redirect_url, session
         )
 
 
diff --git a/synapse/rest/client/v2_alpha/auth.py b/synapse/rest/client/v2_alpha/auth.py
index 1787562b90..13f9604407 100644
--- a/synapse/rest/client/v2_alpha/auth.py
+++ b/synapse/rest/client/v2_alpha/auth.py
@@ -111,6 +111,11 @@ class AuthRestServlet(RestServlet):
         self._saml_enabled = hs.config.saml2_enabled
         if self._saml_enabled:
             self._saml_handler = hs.get_saml_handler()
+        self._cas_enabled = hs.config.cas_enabled
+        if self._cas_enabled:
+            self._cas_handler = hs.get_cas_handler()
+            self._cas_server_url = hs.config.cas_server_url
+            self._cas_service_url = hs.config.cas_service_url
 
     def on_GET(self, request, stagetype):
         session = parse_string(request, "session")
@@ -133,14 +138,27 @@ class AuthRestServlet(RestServlet):
                 % (CLIENT_API_PREFIX, LoginType.TERMS),
             }
 
-        elif stagetype == LoginType.SSO and self._saml_enabled:
+        elif stagetype == LoginType.SSO:
             # Display a confirmation page which prompts the user to
             # re-authenticate with their SSO provider.
-            client_redirect_url = ""
-            sso_redirect_url = self._saml_handler.handle_redirect_request(
-                client_redirect_url, session
-            )
+            if self._cas_enabled:
+                # Generate a request to CAS that redirects back to an endpoint
+                # to verify the successful authentication.
+                sso_redirect_url = self._cas_handler.get_redirect_url(
+                    {"session": session},
+                )
+
+            elif self._saml_enabled:
+                client_redirect_url = ""
+                sso_redirect_url = self._saml_handler.handle_redirect_request(
+                    client_redirect_url, session
+                )
+
+            else:
+                raise SynapseError(400, "Homeserver not configured for SSO.")
+
             html = self.auth_handler.start_sso_ui_auth(sso_redirect_url, session)
+
         else:
             raise SynapseError(404, "Unknown auth stage type")