Add configuration setting for CAS protocol version (#15816)

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Aurélien Grimpard 2023-08-24 22:11:23 +02:00 committed by GitHub
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4 changed files with 20 additions and 2 deletions

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@ -0,0 +1 @@
Add configuration setting for CAS protocol version. Contributed by Aurélien Grimpard.

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@ -3420,6 +3420,7 @@ Has the following sub-options:
to style the login flow according to the identity provider in question.
See the [spec](https://spec.matrix.org/latest/) for possible options here.
* `server_url`: The URL of the CAS authorization endpoint.
* `protocol_version`: The CAS protocol version, defaults to none (version 3 is required if you want to use "required_attributes").
* `displayname_attribute`: The attribute of the CAS response to use as the display name.
If no name is given here, no displayname will be set.
* `required_attributes`: It is possible to configure Synapse to only allow logins if CAS attributes
@ -3433,6 +3434,7 @@ Example configuration:
cas_config:
enabled: true
server_url: "https://cas-server.com"
protocol_version: 3
displayname_attribute: name
required_attributes:
userGroup: "staff"

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@ -18,7 +18,7 @@ from typing import Any, List
from synapse.config.sso import SsoAttributeRequirement
from synapse.types import JsonDict
from ._base import Config
from ._base import Config, ConfigError
from ._util import validate_config
@ -41,6 +41,16 @@ class CasConfig(Config):
public_baseurl = self.root.server.public_baseurl
self.cas_service_url = public_baseurl + "_matrix/client/r0/login/cas/ticket"
self.cas_protocol_version = cas_config.get("protocol_version")
if (
self.cas_protocol_version is not None
and self.cas_protocol_version not in [1, 2, 3]
):
raise ConfigError(
"Unsupported CAS protocol version %s (only versions 1, 2, 3 are supported)"
% (self.cas_protocol_version,),
("cas_config", "protocol_version"),
)
self.cas_displayname_attribute = cas_config.get("displayname_attribute")
required_attributes = cas_config.get("required_attributes") or {}
self.cas_required_attributes = _parsed_required_attributes_def(
@ -54,6 +64,7 @@ class CasConfig(Config):
else:
self.cas_server_url = None
self.cas_service_url = None
self.cas_protocol_version = None
self.cas_displayname_attribute = None
self.cas_required_attributes = []

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@ -67,6 +67,7 @@ class CasHandler:
self._cas_server_url = hs.config.cas.cas_server_url
self._cas_service_url = hs.config.cas.cas_service_url
self._cas_protocol_version = hs.config.cas.cas_protocol_version
self._cas_displayname_attribute = hs.config.cas.cas_displayname_attribute
self._cas_required_attributes = hs.config.cas.cas_required_attributes
@ -121,7 +122,10 @@ class CasHandler:
Returns:
The parsed CAS response.
"""
uri = self._cas_server_url + "/proxyValidate"
if self._cas_protocol_version == 3:
uri = self._cas_server_url + "/p3/proxyValidate"
else:
uri = self._cas_server_url + "/proxyValidate"
args = {
"ticket": ticket,
"service": self._build_service_param(service_args),