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Add support for stable MSC2858 API (#9617)

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The stable format uses different brand identifiers, so we need to support two
identifiers for each IdP.
This commit is contained in:
Richard van der Hoff 2021-03-16 11:21:26 +00:00 committed by GitHub
parent 5b5bc188cf
commit dd69110d95
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10 changed files with 88 additions and 28 deletions
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1
changelog.d/9617.feature Normal file
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@ -0,0 +1 @@
Finalise support for allowing clients to pick an SSO Identity Provider ([MSC2858](https://github.com/matrix-org/matrix-doc/pull/2858)).

8
docs/openid.md
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@ -226,7 +226,7 @@ Synapse config:
oidc_providers:
- idp_id: github
idp_name: Github
idp_brand: "org.matrix.github" # optional: styling hint for clients
idp_brand: "github" # optional: styling hint for clients
discover: false
issuer: "https://github.com/"
client_id: "your-client-id" # TO BE FILLED
@ -252,7 +252,7 @@ oidc_providers:
oidc_providers:
- idp_id: google
idp_name: Google
idp_brand: "org.matrix.google" # optional: styling hint for clients
idp_brand: "google" # optional: styling hint for clients
issuer: "https://accounts.google.com/"
client_id: "your-client-id" # TO BE FILLED
client_secret: "your-client-secret" # TO BE FILLED
@ -299,7 +299,7 @@ Synapse config:
oidc_providers:
- idp_id: gitlab
idp_name: Gitlab
idp_brand: "org.matrix.gitlab" # optional: styling hint for clients
idp_brand: "gitlab" # optional: styling hint for clients
issuer: "https://gitlab.com/"
client_id: "your-client-id" # TO BE FILLED
client_secret: "your-client-secret" # TO BE FILLED
@ -334,7 +334,7 @@ Synapse config:
```yaml
- idp_id: facebook
idp_name: Facebook
idp_brand: "org.matrix.facebook" # optional: styling hint for clients
idp_brand: "facebook" # optional: styling hint for clients
discover: false
issuer: "https://facebook.com"
client_id: "your-client-id" # TO BE FILLED

2
docs/sample_config.yaml
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@ -1919,7 +1919,7 @@ oidc_providers:
#
#- idp_id: github
# idp_name: Github
# idp_brand: org.matrix.github
# idp_brand: github
# discover: false
# issuer: "https://github.com/"
# client_id: "your-client-id" # TO BE FILLED

13
synapse/config/oidc_config.py
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@ -237,7 +237,7 @@ class OIDCConfig(Config):
#
#- idp_id: github
# idp_name: Github
# idp_brand: org.matrix.github
# idp_brand: github
# discover: false
# issuer: "https://github.com/"
# client_id: "your-client-id" # TO BE FILLED
@ -272,7 +272,12 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
"idp_icon": {"type": "string"},
"idp_brand": {
"type": "string",
# MSC2758-style namespaced identifier
"minLength": 1,
"maxLength": 255,
"pattern": "^[a-z][a-z0-9_.-]*$",
},
"idp_unstable_brand": {
"type": "string",
"minLength": 1,
"maxLength": 255,
"pattern": "^[a-z][a-z0-9_.-]*$",
@ -466,6 +471,7 @@ def _parse_oidc_config_dict(
idp_name=oidc_config.get("idp_name", "OIDC"),
idp_icon=idp_icon,
idp_brand=oidc_config.get("idp_brand"),
unstable_idp_brand=oidc_config.get("unstable_idp_brand"),
discover=oidc_config.get("discover", True),
issuer=oidc_config["issuer"],
client_id=oidc_config["client_id"],
@ -512,6 +518,9 @@ class OidcProviderConfig:
# Optional brand identifier for this IdP.
idp_brand = attr.ib(type=Optional[str])
# Optional brand identifier for the unstable API (see MSC2858).
unstable_idp_brand = attr.ib(type=Optional[str])
# whether the OIDC discovery mechanism is used to discover endpoints
discover = attr.ib(type=bool)

1
synapse/handlers/cas_handler.py
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@ -83,6 +83,7 @@ class CasHandler:
# the SsoIdentityProvider protocol type.
self.idp_icon = None
self.idp_brand = None
self.unstable_idp_brand = None
self._sso_handler = hs.get_sso_handler()

3
synapse/handlers/oidc_handler.py
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@ -330,6 +330,9 @@ class OidcProvider:
# optional brand identifier for this auth provider
self.idp_brand = provider.idp_brand
# Optional brand identifier for the unstable API (see MSC2858).
self.unstable_idp_brand = provider.unstable_idp_brand
self._sso_handler = hs.get_sso_handler()
self._sso_handler.register_identity_provider(self)

1
synapse/handlers/saml_handler.py
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@ -81,6 +81,7 @@ class SamlHandler(BaseHandler):
# the SsoIdentityProvider protocol type.
self.idp_icon = None
self.idp_brand = None
self.unstable_idp_brand = None
# a map from saml session id to Saml2SessionData object
self._outstanding_requests_dict = {} # type: Dict[str, Saml2SessionData]

5
synapse/handlers/sso.py
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@ -98,6 +98,11 @@ class SsoIdentityProvider(Protocol):
"""Optional branding identifier"""
return None
@property
def unstable_idp_brand(self) -> Optional[str]:
"""Optional brand identifier for the unstable API (see MSC2858)."""
return None
@abc.abstractmethod
async def handle_redirect_request(
self,

39
synapse/rest/client/v1/login.py
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@ -14,10 +14,12 @@
# limitations under the License.
import logging
import re
from typing import TYPE_CHECKING, Awaitable, Callable, Dict, Optional
from synapse.api.errors import Codes, LoginError, SynapseError
from synapse.api.ratelimiting import Ratelimiter
from synapse.api.urls import CLIENT_API_PREFIX
from synapse.appservice import ApplicationService
from synapse.handlers.sso import SsoIdentityProvider
from synapse.http import get_request_uri
@ -94,11 +96,21 @@ class LoginRestServlet(RestServlet):
flows.append({"type": LoginRestServlet.CAS_TYPE})
if self.cas_enabled or self.saml2_enabled or self.oidc_enabled:
sso_flow = {"type": LoginRestServlet.SSO_TYPE} # type: JsonDict
sso_flow = {
"type": LoginRestServlet.SSO_TYPE,
"identity_providers": [
_get_auth_flow_dict_for_idp(
idp,
)
for idp in self._sso_handler.get_identity_providers().values()
],
} # type: JsonDict
if self._msc2858_enabled:
# backwards-compatibility support for clients which don't
# support the stable API yet
sso_flow["org.matrix.msc2858.identity_providers"] = [
_get_auth_flow_dict_for_idp(idp)
_get_auth_flow_dict_for_idp(idp, use_unstable_brands=True)
for idp in self._sso_handler.get_identity_providers().values()
]
@ -331,22 +343,38 @@ class LoginRestServlet(RestServlet):
return result
def _get_auth_flow_dict_for_idp(idp: SsoIdentityProvider) -> JsonDict:
def _get_auth_flow_dict_for_idp(
idp: SsoIdentityProvider, use_unstable_brands: bool = False
) -> JsonDict:
"""Return an entry for the login flow dict
Returns an entry suitable for inclusion in "identity_providers" in the
response to GET /_matrix/client/r0/login
Args:
idp: the identity provider to describe
use_unstable_brands: whether we should use brand identifiers suitable
for the unstable API
"""
e = {"id": idp.idp_id, "name": idp.idp_name} # type: JsonDict
if idp.idp_icon:
e["icon"] = idp.idp_icon
if idp.idp_brand:
e["brand"] = idp.idp_brand
# use the stable brand identifier if the unstable identifier isn't defined.
if use_unstable_brands and idp.unstable_idp_brand:
e["brand"] = idp.unstable_idp_brand
return e
class SsoRedirectServlet(RestServlet):
PATTERNS = client_patterns("/login/(cas|sso)/redirect$", v1=True)
PATTERNS = list(client_patterns("/login/(cas|sso)/redirect$", v1=True)) + [
re.compile(
"^"
+ CLIENT_API_PREFIX
+ "/r0/login/sso/redirect/(?P<idp_id>[A-Za-z0-9_.~-]+)$"
)
]
def __init__(self, hs: "HomeServer"):
# make sure that the relevant handlers are instantiated, so that they
@ -364,7 +392,8 @@ class SsoRedirectServlet(RestServlet):
def register(self, http_server: HttpServer) -> None:
super().register(http_server)
if self._msc2858_enabled:
# expose additional endpoint for MSC2858 support
# expose additional endpoint for MSC2858 support: backwards-compat support
# for clients which don't yet support the stable endpoints.
http_server.register_paths(
"GET",
client_patterns(

43
tests/rest/client/v1/test_login.py
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@ -437,14 +437,16 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
channel = self.make_request("GET", "/_matrix/client/r0/login")
self.assertEqual(channel.code, 200, channel.result)
expected_flows = [
{"type": "m.login.cas"},
{"type": "m.login.sso"},
{"type": "m.login.token"},
{"type": "m.login.password"},
] + ADDITIONAL_LOGIN_FLOWS
expected_flow_types = [
"m.login.cas",
"m.login.sso",
"m.login.token",
"m.login.password",
] + [f["type"] for f in ADDITIONAL_LOGIN_FLOWS]
self.assertCountEqual(channel.json_body["flows"], expected_flows)
self.assertCountEqual(
[f["type"] for f in channel.json_body["flows"]], expected_flow_types
)
@override_config({"experimental_features": {"msc2858_enabled": True}})
def test_get_msc2858_login_flows(self):
@ -636,22 +638,25 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
)
self.assertEqual(channel.code, 400, channel.result)
def test_client_idp_redirect_msc2858_disabled(self):
"""If the client tries to pick an IdP but MSC2858 is disabled, return a 400"""
channel = self._make_sso_redirect_request(True, "oidc")
self.assertEqual(channel.code, 400, channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNRECOGNIZED")
@override_config({"experimental_features": {"msc2858_enabled": True}})
def test_client_idp_redirect_to_unknown(self):
"""If the client tries to pick an unknown IdP, return a 404"""
channel = self._make_sso_redirect_request(True, "xxx")
channel = self._make_sso_redirect_request(False, "xxx")
self.assertEqual(channel.code, 404, channel.result)
self.assertEqual(channel.json_body["errcode"], "M_NOT_FOUND")
@override_config({"experimental_features": {"msc2858_enabled": True}})
def test_client_idp_redirect_to_oidc(self):
"""If the client pick a known IdP, redirect to it"""
channel = self._make_sso_redirect_request(False, "oidc")
self.assertEqual(channel.code, 302, channel.result)
oidc_uri = channel.headers.getRawHeaders("Location")[0]
oidc_uri_path, oidc_uri_query = oidc_uri.split("?", 1)
# it should redirect us to the auth page of the OIDC server
self.assertEqual(oidc_uri_path, TEST_OIDC_AUTH_ENDPOINT)
@override_config({"experimental_features": {"msc2858_enabled": True}})
def test_client_msc2858_redirect_to_oidc(self):
"""Test the unstable API"""
channel = self._make_sso_redirect_request(True, "oidc")
self.assertEqual(channel.code, 302, channel.result)
oidc_uri = channel.headers.getRawHeaders("Location")[0]
@ -660,6 +665,12 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
# it should redirect us to the auth page of the OIDC server
self.assertEqual(oidc_uri_path, TEST_OIDC_AUTH_ENDPOINT)
def test_client_idp_redirect_msc2858_disabled(self):
"""If the client tries to use the MSC2858 endpoint but MSC2858 is disabled, return a 400"""
channel = self._make_sso_redirect_request(True, "oidc")
self.assertEqual(channel.code, 400, channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNRECOGNIZED")
def _make_sso_redirect_request(
self, unstable_endpoint: bool = False, idp_prov: Optional[str] = None
):