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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.
This commit is contained in:
Richard van der Hoff
GitHub
parent
869667760f
commit
a083aea396
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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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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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1
changelog.d/9242.feature
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1
changelog.d/9242.feature
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@ -0,0 +1 @@
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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:
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oidc_providers:
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- idp_id: github
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idp_name: Github
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idp_brand: "org.matrix.github" # optional: styling hint for clients
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discover: false
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issuer: "https://github.com/"
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client_id: "your-client-id" # TO BE FILLED
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@ -250,6 +251,7 @@ oidc_providers:
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oidc_providers:
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- idp_id: google
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idp_name: Google
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idp_brand: "org.matrix.google" # optional: styling hint for clients
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issuer: "https://accounts.google.com/"
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client_id: "your-client-id" # TO BE FILLED
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client_secret: "your-client-secret" # TO BE FILLED
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@ -296,6 +298,7 @@ Synapse config:
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oidc_providers:
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- idp_id: gitlab
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idp_name: Gitlab
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idp_brand: "org.matrix.gitlab" # optional: styling hint for clients
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issuer: "https://gitlab.com/"
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client_id: "your-client-id" # TO BE FILLED
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client_secret: "your-client-secret" # TO BE FILLED
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@ -1727,10 +1727,14 @@ saml2_config:
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# offer the user a choice of login mechanisms.
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#
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# idp_icon: An optional icon for this identity provider, which is presented
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# by identity picker pages. If given, must be an MXC URI of the format
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# mxc://<server-name>/<media-id>. (An easy way to obtain such an MXC URI
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# is to upload an image to an (unencrypted) room and then copy the "url"
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# from the source of the event.)
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# by clients and Synapse's own IdP picker page. If given, must be an
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# MXC URI of the format mxc://<server-name>/<media-id>. (An easy way to
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# obtain such an MXC URI is to upload an image to an (unencrypted) room
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# and then copy the "url" from the source of the event.)
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#
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# idp_brand: An optional brand for this identity provider, allowing clients
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# to style the login flow according to the identity provider in question.
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# See the spec for possible options here.
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#
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# discover: set to 'false' to disable the use of the OIDC discovery mechanism
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# to discover endpoints. Defaults to true.
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@ -1860,6 +1864,7 @@ oidc_providers:
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#
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#- idp_id: github
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# idp_name: Github
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# idp_brand: org.matrix.github
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# discover: false
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# issuer: "https://github.com/"
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# client_id: "your-client-id" # TO BE FILLED
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@ -14,7 +14,6 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import string
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from collections import Counter
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from typing import Iterable, Optional, Tuple, Type
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@ -79,10 +78,14 @@ class OIDCConfig(Config):
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# offer the user a choice of login mechanisms.
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#
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# idp_icon: An optional icon for this identity provider, which is presented
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# by identity picker pages. If given, must be an MXC URI of the format
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# mxc://<server-name>/<media-id>. (An easy way to obtain such an MXC URI
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# is to upload an image to an (unencrypted) room and then copy the "url"
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# from the source of the event.)
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# by clients and Synapse's own IdP picker page. If given, must be an
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# MXC URI of the format mxc://<server-name>/<media-id>. (An easy way to
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# obtain such an MXC URI is to upload an image to an (unencrypted) room
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# and then copy the "url" from the source of the event.)
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#
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# idp_brand: An optional brand for this identity provider, allowing clients
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# to style the login flow according to the identity provider in question.
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# See the spec for possible options here.
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#
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# discover: set to 'false' to disable the use of the OIDC discovery mechanism
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# to discover endpoints. Defaults to true.
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@ -212,6 +215,7 @@ class OIDCConfig(Config):
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#
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#- idp_id: github
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# idp_name: Github
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# idp_brand: org.matrix.github
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# discover: false
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# issuer: "https://github.com/"
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# client_id: "your-client-id" # TO BE FILLED
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@ -235,11 +239,22 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
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"type": "object",
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"required": ["issuer", "client_id", "client_secret"],
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"properties": {
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# TODO: fix the maxLength here depending on what MSC2528 decides
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# remember that we prefix the ID given here with `oidc-`
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"idp_id": {"type": "string", "minLength": 1, "maxLength": 128},
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"idp_id": {
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"type": "string",
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"minLength": 1,
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# MSC2858 allows a maxlen of 255, but we prefix with "oidc-"
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"maxLength": 250,
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"pattern": "^[A-Za-z0-9._~-]+$",
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},
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"idp_name": {"type": "string"},
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"idp_icon": {"type": "string"},
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"idp_brand": {
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"type": "string",
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# MSC2758-style namespaced identifier
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"minLength": 1,
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"maxLength": 255,
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"pattern": "^[a-z][a-z0-9_.-]*$",
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},
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"discover": {"type": "boolean"},
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"issuer": {"type": "string"},
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"client_id": {"type": "string"},
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@ -358,25 +373,8 @@ def _parse_oidc_config_dict(
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config_path + ("user_mapping_provider", "module"),
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)
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# MSC2858 will apply certain limits in what can be used as an IdP id, so let's
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# enforce those limits now.
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# TODO: factor out this stuff to a generic function
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idp_id = oidc_config.get("idp_id", "oidc")
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# TODO: update this validity check based on what MSC2858 decides.
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valid_idp_chars = set(string.ascii_lowercase + string.digits + "-._")
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if any(c not in valid_idp_chars for c in idp_id):
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raise ConfigError(
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'idp_id may only contain a-z, 0-9, "-", ".", "_"',
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config_path + ("idp_id",),
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)
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if idp_id[0] not in string.ascii_lowercase:
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raise ConfigError(
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"idp_id must start with a-z", config_path + ("idp_id",),
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)
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# prefix the given IDP with a prefix specific to the SSO mechanism, to avoid
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# clashes with other mechs (such as SAML, CAS).
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#
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@ -402,6 +400,7 @@ def _parse_oidc_config_dict(
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idp_id=idp_id,
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idp_name=oidc_config.get("idp_name", "OIDC"),
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idp_icon=idp_icon,
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idp_brand=oidc_config.get("idp_brand"),
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discover=oidc_config.get("discover", True),
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issuer=oidc_config["issuer"],
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client_id=oidc_config["client_id"],
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@ -432,6 +431,9 @@ class OidcProviderConfig:
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# Optional MXC URI for icon for this IdP.
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idp_icon = attr.ib(type=Optional[str])
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# Optional brand identifier for this IdP.
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idp_brand = attr.ib(type=Optional[str])
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# whether the OIDC discovery mechanism is used to discover endpoints
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discover = attr.ib(type=bool)
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@ -80,9 +80,10 @@ class CasHandler:
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# user-facing name of this auth provider
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self.idp_name = "CAS"
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# we do not currently support icons for CAS auth, but this is required by
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# we do not currently support brands/icons for CAS auth, but this is required by
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# the SsoIdentityProvider protocol type.
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self.idp_icon = None
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self.idp_brand = None
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self._sso_handler = hs.get_sso_handler()
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@ -274,6 +274,9 @@ class OidcProvider:
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# MXC URI for icon for this auth provider
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self.idp_icon = provider.idp_icon
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# optional brand identifier for this auth provider
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self.idp_brand = provider.idp_brand
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self._sso_handler = hs.get_sso_handler()
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self._sso_handler.register_identity_provider(self)
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@ -78,9 +78,10 @@ class SamlHandler(BaseHandler):
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# user-facing name of this auth provider
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self.idp_name = "SAML"
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# we do not currently support icons for SAML auth, but this is required by
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# we do not currently support icons/brands for SAML auth, but this is required by
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# the SsoIdentityProvider protocol type.
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self.idp_icon = None
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self.idp_brand = None
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# a map from saml session id to Saml2SessionData object
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self._outstanding_requests_dict = {} # type: Dict[str, Saml2SessionData]
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@ -80,6 +80,11 @@ class SsoIdentityProvider(Protocol):
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"""Optional MXC URI for user-facing icon"""
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return None
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@property
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def idp_brand(self) -> Optional[str]:
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"""Optional branding identifier"""
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return None
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@abc.abstractmethod
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async def handle_redirect_request(
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self,
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@ -333,6 +333,8 @@ def _get_auth_flow_dict_for_idp(idp: SsoIdentityProvider) -> JsonDict:
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e = {"id": idp.idp_id, "name": idp.idp_name} # type: JsonDict
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if idp.idp_icon:
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e["icon"] = idp.idp_icon
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if idp.idp_brand:
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e["brand"] = idp.idp_brand
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return e
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