Update Mastodon SSO instructions (#15587)

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villepeh 2023-05-15 12:17:24 +03:00 committed by GitHub
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changelog.d/15587.doc Normal file
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@ -0,0 +1 @@
Update and improve Mastodon Single Sign-On documentation.

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@ -569,7 +569,7 @@ You should receive a response similar to the following. Make sure to save it.
{"client_id":"someclientid_123","client_secret":"someclientsecret_123","id":"12345","name":"my_synapse_app","redirect_uri":"https://[synapse_public_baseurl]/_synapse/client/oidc/callback","website":null,"vapid_key":"somerandomvapidkey_123"}
```
As the Synapse login mechanism needs an attribute to uniquely identify users, and Mastodon's endpoint does not return a `sub` property, an alternative `subject_claim` has to be set. Your Synapse configuration should include the following:
As the Synapse login mechanism needs an attribute to uniquely identify users, and Mastodon's endpoint does not return a `sub` property, an alternative `subject_template` has to be set. Your Synapse configuration should include the following:
```yaml
oidc_providers:
@ -585,7 +585,9 @@ oidc_providers:
scopes: ["read"]
user_mapping_provider:
config:
subject_claim: "id"
subject_template: "{{ user.id }}"
localpart_template: "{{ user.username }}"
display_name_template: "{{ user.display_name }}"
```
Note that the fields `client_id` and `client_secret` are taken from the CURL response above.