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Prefix idp_id with "oidc-" (#9189) 

... to avoid clashes with other SSO mechanisms
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Richard van der Hoff 2021-01-21 12:25:02 +00:00 committed by GitHub
parent 937b849a2e
commit 7447f19702
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4 changed files with 35 additions and 9 deletions
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1
changelog.d/9189.misc Normal file
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@ -0,0 +1 @@
Add an `oidc-` prefix to any `idp_id`s which are given in the `oidc_providers` configuration.

13
docs/sample_config.yaml
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@ -1728,7 +1728,9 @@ saml2_config:
#
# 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>
# 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.)
#
# discover: set to 'false' to disable the use of the OIDC discovery mechanism
# to discover endpoints. Defaults to true.
@ -1814,13 +1816,16 @@ saml2_config:
#
# For backwards compatibility, it is also possible to configure a single OIDC
# provider via an 'oidc_config' setting. This is now deprecated and admins are
# advised to migrate to the 'oidc_providers' format.
# advised to migrate to the 'oidc_providers' format. (When doing that migration,
# use 'oidc' for the idp_id to ensure that existing users continue to be
# recognised.)
#
oidc_providers:
# Generic example
#
#- idp_id: my_idp
# idp_name: "My OpenID provider"
# idp_icon: "mxc://example.com/mediaid"
# discover: false
# issuer: "https://accounts.example.com/"
# client_id: "provided-by-your-issuer"
@ -1844,8 +1849,8 @@ oidc_providers:
# For use with Github
#
#- idp_id: google
# idp_name: Google
#- idp_id: github
# idp_name: Github
# discover: false
# issuer: "https://github.com/"
# client_id: "your-client-id" # TO BE FILLED

28
synapse/config/oidc_config.py
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@ -69,7 +69,9 @@ class OIDCConfig(Config):
#
# 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>
# 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.)
#
# discover: set to 'false' to disable the use of the OIDC discovery mechanism
# to discover endpoints. Defaults to true.
@ -155,13 +157,16 @@ class OIDCConfig(Config):
#
# For backwards compatibility, it is also possible to configure a single OIDC
# provider via an 'oidc_config' setting. This is now deprecated and admins are
# advised to migrate to the 'oidc_providers' format.
# advised to migrate to the 'oidc_providers' format. (When doing that migration,
# use 'oidc' for the idp_id to ensure that existing users continue to be
# recognised.)
#
oidc_providers:
# Generic example
#
#- idp_id: my_idp
# idp_name: "My OpenID provider"
# idp_icon: "mxc://example.com/mediaid"
# discover: false
# issuer: "https://accounts.example.com/"
# client_id: "provided-by-your-issuer"
@ -185,8 +190,8 @@ class OIDCConfig(Config):
# For use with Github
#
#- idp_id: google
# idp_name: Google
#- idp_id: github
# idp_name: Github
# discover: false
# issuer: "https://github.com/"
# client_id: "your-client-id" # TO BE FILLED
@ -210,6 +215,8 @@ 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_name": {"type": "string"},
"idp_icon": {"type": "string"},
@ -335,6 +342,8 @@ def _parse_oidc_config_dict(
# 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):
@ -348,6 +357,17 @@ def _parse_oidc_config_dict(
"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).
#
# We allow "oidc" as an exception so that people migrating from old-style
# "oidc_config" format (which has long used "oidc" as its idp_id) can migrate to
# a new-style "oidc_providers" entry without changing the idp_id for their provider
# (and thereby invalidating their user_external_ids data).
if idp_id != "oidc":
idp_id = "oidc-" + idp_id
# MSC2858 also specifies that the idp_icon must be a valid MXC uri
idp_icon = oidc_config.get("idp_icon")
if idp_icon is not None:

2
tests/rest/client/v1/test_login.py
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@ -446,7 +446,7 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
p.feed(channel.result["body"].decode("utf-8"))
p.close()
self.assertCountEqual(p.radios["idp"], ["cas", "oidc", "idp1", "saml"])
self.assertCountEqual(p.radios["idp"], ["cas", "oidc", "oidc-idp1", "saml"])
self.assertEqual(p.hiddens["redirectUrl"], TEST_CLIENT_REDIRECT_URL)