Add an OpenID example config for Gitea. (#9134)

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Oliver Hanikel 2021-02-01 22:21:09 +01:00 committed by GitHub
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Add docs for using Gitea as OpenID provider.

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@ -353,3 +353,37 @@ Relevant documents:
* https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow
* Using Facebook's Graph API: https://developers.facebook.com/docs/graph-api/using-graph-api/
* Reference to the User endpoint: https://developers.facebook.com/docs/graph-api/reference/user
### Gitea
Gitea is, like Github, not an OpenID provider, but just an OAuth2 provider.
The [`/user` API endpoint](https://try.gitea.io/api/swagger#/user/userGetCurrent)
can be used to retrieve information on the authenticated user. As the Synapse
login mechanism needs an attribute to uniquely identify users, and that endpoint
does not return a `sub` property, an alternative `subject_claim` has to be set.
1. Create a new application.
2. Add this Callback URL: `[synapse public baseurl]/_synapse/oidc/callback`
Synapse config:
```yaml
oidc_providers:
- idp_id: gitea
idp_name: Gitea
discover: false
issuer: "https://your-gitea.com/"
client_id: "your-client-id" # TO BE FILLED
client_secret: "your-client-secret" # TO BE FILLED
client_auth_method: client_secret_post
scopes: [] # Gitea doesn't support Scopes
authorization_endpoint: "https://your-gitea.com/login/oauth/authorize"
token_endpoint: "https://your-gitea.com/login/oauth/access_token"
userinfo_endpoint: "https://your-gitea.com/api/v1/user"
user_mapping_provider:
config:
subject_claim: "id"
localpart_template: "{{ user.login }}"
display_name_template: "{{ user.full_name }}"
```