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UI Auth via SSO: redirect the user to an appropriate SSO. (#9081)

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If we have integrations with multiple identity providers, when the user does a UI Auth, we need to redirect them to the right one.

There are a few steps to this. First of all we actually need to store the userid of the user we are trying to validate in the UIA session, since the /auth/sso/fallback/web request is unauthenticated.

Then, once we get the /auth/sso/fallback/web request, we can fish the user id out of the session, and use it to look up the external id mappings, and hence pick an SSO provider for them.
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Richard van der Hoff 2021-01-12 17:38:03 +00:00 • committed by GitHub
parent 723b19748a
commit 789d9ebad3
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7 changed files with 133 additions and 60 deletions
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13
synapse/rest/client/v2_alpha/register.py
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@ -38,6 +38,7 @@ from synapse.config.ratelimiting import FederationRateLimitConfig
from synapse.config.registration import RegistrationConfig
from synapse.config.server import is_threepid_reserved
from synapse.handlers.auth import AuthHandler
from synapse.handlers.ui_auth import UIAuthSessionDataConstants
from synapse.http.server import finish_request, respond_with_html
from synapse.http.servlet import (
RestServlet,
@ -494,11 +495,11 @@ class RegisterRestServlet(RestServlet):
# user here. We carry on and go through the auth checks though,
# for paranoia.
registered_user_id = await self.auth_handler.get_session_data(
session_id, "registered_user_id", None
session_id, UIAuthSessionDataConstants.REGISTERED_USER_ID, None
)
# Extract the previously-hashed password from the session.
password_hash = await self.auth_handler.get_session_data(
session_id, "password_hash", None
session_id, UIAuthSessionDataConstants.PASSWORD_HASH, None
)
# Ensure that the username is valid.
@ -528,7 +529,9 @@ class RegisterRestServlet(RestServlet):
if not password_hash and password:
password_hash = await self.auth_handler.hash(password)
await self.auth_handler.set_session_data(
e.session_id, "password_hash", password_hash
e.session_id,
UIAuthSessionDataConstants.PASSWORD_HASH,
password_hash,
)
raise
@ -629,7 +632,9 @@ class RegisterRestServlet(RestServlet):
# Remember that the user account has been registered (and the user
# ID it was registered with, since it might not have been specified).
await self.auth_handler.set_session_data(
session_id, "registered_user_id", registered_user_id
session_id,
UIAuthSessionDataConstants.REGISTERED_USER_ID,
registered_user_id,
)
registered = True