Add 'brand' field to MSC2858 response (#9242)

We've decided to add a 'brand' field to help clients decide how to style the
buttons.

Also, fix up the allowed characters for idp_id, while I'm in the area.
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Richard van der Hoff 2021-01-27 21:31:45 +00:00 committed by GitHub
parent 869667760f
commit a083aea396
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10 changed files with 55 additions and 32 deletions

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@ -1 +1 @@
Add experimental support for allowing clients to pick an SSO Identity Provider ([MSC2858](https://github.com/matrix-org/matrix-doc/pull/2858).
Add experimental support for allowing clients to pick an SSO Identity Provider ([MSC2858](https://github.com/matrix-org/matrix-doc/pull/2858)).

1
changelog.d/9242.feature Normal file
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@ -0,0 +1 @@
Add experimental support for allowing clients to pick an SSO Identity Provider ([MSC2858](https://github.com/matrix-org/matrix-doc/pull/2858)).

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@ -225,6 +225,7 @@ Synapse config:
oidc_providers:
- idp_id: github
idp_name: Github
idp_brand: "org.matrix.github" # optional: styling hint for clients
discover: false
issuer: "https://github.com/"
client_id: "your-client-id" # TO BE FILLED
@ -250,6 +251,7 @@ oidc_providers:
oidc_providers:
- idp_id: google
idp_name: Google
idp_brand: "org.matrix.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
@ -296,6 +298,7 @@ Synapse config:
oidc_providers:
- idp_id: gitlab
idp_name: Gitlab
idp_brand: "org.matrix.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

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@ -1727,10 +1727,14 @@ saml2_config:
# offer the user a choice of login mechanisms.
#
# idp_icon: An optional icon for this identity provider, which is presented
# by identity picker pages. If given, must be an MXC URI of the format
# mxc://<server-name>/<media-id>. (An easy way to obtain such an MXC URI
# is to upload an image to an (unencrypted) room and then copy the "url"
# from the source of the event.)
# by clients and Synapse's own IdP picker page. If given, must be an
# MXC URI of the format mxc://<server-name>/<media-id>. (An easy way to
# obtain such an MXC URI is to upload an image to an (unencrypted) room
# and then copy the "url" from the source of the event.)
#
# idp_brand: An optional brand for this identity provider, allowing clients
# to style the login flow according to the identity provider in question.
# See the spec for possible options here.
#
# discover: set to 'false' to disable the use of the OIDC discovery mechanism
# to discover endpoints. Defaults to true.
@ -1860,6 +1864,7 @@ oidc_providers:
#
#- idp_id: github
# idp_name: Github
# idp_brand: org.matrix.github
# discover: false
# issuer: "https://github.com/"
# client_id: "your-client-id" # TO BE FILLED

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@ -14,7 +14,6 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import string
from collections import Counter
from typing import Iterable, Optional, Tuple, Type
@ -79,10 +78,14 @@ class OIDCConfig(Config):
# offer the user a choice of login mechanisms.
#
# idp_icon: An optional icon for this identity provider, which is presented
# by identity picker pages. If given, must be an MXC URI of the format
# mxc://<server-name>/<media-id>. (An easy way to obtain such an MXC URI
# is to upload an image to an (unencrypted) room and then copy the "url"
# from the source of the event.)
# by clients and Synapse's own IdP picker page. If given, must be an
# MXC URI of the format mxc://<server-name>/<media-id>. (An easy way to
# obtain such an MXC URI is to upload an image to an (unencrypted) room
# and then copy the "url" from the source of the event.)
#
# idp_brand: An optional brand for this identity provider, allowing clients
# to style the login flow according to the identity provider in question.
# See the spec for possible options here.
#
# discover: set to 'false' to disable the use of the OIDC discovery mechanism
# to discover endpoints. Defaults to true.
@ -212,6 +215,7 @@ class OIDCConfig(Config):
#
#- idp_id: github
# idp_name: Github
# idp_brand: org.matrix.github
# discover: false
# issuer: "https://github.com/"
# client_id: "your-client-id" # TO BE FILLED
@ -235,11 +239,22 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
"type": "object",
"required": ["issuer", "client_id", "client_secret"],
"properties": {
# TODO: fix the maxLength here depending on what MSC2528 decides
# remember that we prefix the ID given here with `oidc-`
"idp_id": {"type": "string", "minLength": 1, "maxLength": 128},
"idp_id": {
"type": "string",
"minLength": 1,
# MSC2858 allows a maxlen of 255, but we prefix with "oidc-"
"maxLength": 250,
"pattern": "^[A-Za-z0-9._~-]+$",
},
"idp_name": {"type": "string"},
"idp_icon": {"type": "string"},
"idp_brand": {
"type": "string",
# MSC2758-style namespaced identifier
"minLength": 1,
"maxLength": 255,
"pattern": "^[a-z][a-z0-9_.-]*$",
},
"discover": {"type": "boolean"},
"issuer": {"type": "string"},
"client_id": {"type": "string"},
@ -358,25 +373,8 @@ def _parse_oidc_config_dict(
config_path + ("user_mapping_provider", "module"),
)
# MSC2858 will apply certain limits in what can be used as an IdP id, so let's
# enforce those limits now.
# TODO: factor out this stuff to a generic function
idp_id = oidc_config.get("idp_id", "oidc")
# TODO: update this validity check based on what MSC2858 decides.
valid_idp_chars = set(string.ascii_lowercase + string.digits + "-._")
if any(c not in valid_idp_chars for c in idp_id):
raise ConfigError(
'idp_id may only contain a-z, 0-9, "-", ".", "_"',
config_path + ("idp_id",),
)
if idp_id[0] not in string.ascii_lowercase:
raise ConfigError(
"idp_id must start with a-z", config_path + ("idp_id",),
)
# prefix the given IDP with a prefix specific to the SSO mechanism, to avoid
# clashes with other mechs (such as SAML, CAS).
#
@ -402,6 +400,7 @@ def _parse_oidc_config_dict(
idp_id=idp_id,
idp_name=oidc_config.get("idp_name", "OIDC"),
idp_icon=idp_icon,
idp_brand=oidc_config.get("idp_brand"),
discover=oidc_config.get("discover", True),
issuer=oidc_config["issuer"],
client_id=oidc_config["client_id"],
@ -432,6 +431,9 @@ class OidcProviderConfig:
# Optional MXC URI for icon for this IdP.
idp_icon = attr.ib(type=Optional[str])
# Optional brand identifier for this IdP.
idp_brand = attr.ib(type=Optional[str])
# whether the OIDC discovery mechanism is used to discover endpoints
discover = attr.ib(type=bool)

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@ -80,9 +80,10 @@ class CasHandler:
# user-facing name of this auth provider
self.idp_name = "CAS"
# we do not currently support icons for CAS auth, but this is required by
# we do not currently support brands/icons for CAS auth, but this is required by
# the SsoIdentityProvider protocol type.
self.idp_icon = None
self.idp_brand = None
self._sso_handler = hs.get_sso_handler()

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@ -274,6 +274,9 @@ class OidcProvider:
# MXC URI for icon for this auth provider
self.idp_icon = provider.idp_icon
# optional brand identifier for this auth provider
self.idp_brand = provider.idp_brand
self._sso_handler = hs.get_sso_handler()
self._sso_handler.register_identity_provider(self)

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@ -78,9 +78,10 @@ class SamlHandler(BaseHandler):
# user-facing name of this auth provider
self.idp_name = "SAML"
# we do not currently support icons for SAML auth, but this is required by
# we do not currently support icons/brands for SAML auth, but this is required by
# the SsoIdentityProvider protocol type.
self.idp_icon = None
self.idp_brand = None
# a map from saml session id to Saml2SessionData object
self._outstanding_requests_dict = {} # type: Dict[str, Saml2SessionData]

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@ -80,6 +80,11 @@ class SsoIdentityProvider(Protocol):
"""Optional MXC URI for user-facing icon"""
return None
@property
def idp_brand(self) -> Optional[str]:
"""Optional branding identifier"""
return None
@abc.abstractmethod
async def handle_redirect_request(
self,

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@ -333,6 +333,8 @@ def _get_auth_flow_dict_for_idp(idp: SsoIdentityProvider) -> JsonDict:
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
return e