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69 lines
8 KiB
Markdown
69 lines
8 KiB
Markdown
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# OpenID Connect (OIDC)
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HedgeDoc can use one or multiple OIDC servers to authenticate users. To do this, you first need
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to tell HedgeDoc identifiers for the servers you want to use (`HD_AUTH_OIDC_SERVERS`). Then you
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need to provide the configuration for these OIDC servers depending on how you want to use them.
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Each of these variables will contain the identifier for the OIDC server.
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For example, if you chose the identifier `MYOIDC` for your OIDC server, all variables
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for this server will start with `HD_AUTH_OIDC_MYOIDC_`.
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Replace `$NAME` with the identifier of the OIDC server in the table below accordingly.
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| environment variable | default | example | description |
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|------------------------------------|------------------|--------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|
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| `HD_AUTH_OIDC_SERVERS` | - | `MYOIDC` | A comma-seperated list of identifiers of OIDC servers HedgeDoc should use. |
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| `HD_AUTH_OIDC_$NAME_PROVIDER_NAME` | `OpenID Connect` | `My OIDC Single-Sign-On` | The display name for the OIDC server, that is shown in the UI of HegdeDoc. |
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| `HD_AUTH_OIDC_$NAME_ISSUER` | - | `https://auth.example.com` | The base url of the OIDC issuer. It should serve a file `.well-known/openid-configuration` |
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| `HD_AUTH_OIDC_$NAME_CLIENT_ID` | - | `hd2` | The id with which HedgeDoc is registered at the OIDC server. |
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| `HD_AUTH_OIDC_$NAME_CLIENT_SECRET` | - | `c3f70208375cf26700920678ec55b7df7cd75266` | The secret for the HedgeDoc application, given by the OIDC server. |
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| `HD_AUTH_OIDC_$NAME_THEME` | - | `gitlab`, `google`, ... | The theme in which the button on the login page should be displayed. See below for a list of options. If not defined, a generic one will be used. |
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As redirect URL you should configure
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`https://hedgedoc.example.com/api/private/auth/oidc/$NAME/callback` where `$NAME`
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is the identifier of the OIDC server. Remember to update the domain to your one.
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You can also configure servers that only support plain OAuth2 but
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no OIDC (e.g., GitHub or Discord). In this case, you need the following additional variables:
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| environment variable | default | example | description |
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|--------------------------------------------|----------------------|--------------------------------------------|------------------------------------------------------------------------------------------|
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| `HD_AUTH_OIDC_$NAME_AUTHORIZE_URL` | - | `https://auth.example.com/oauth2/auth` | The URL to which the user should be redirected to start the OAuth2 flow. |
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| `HD_AUTH_OIDC_$NAME_TOKEN_URL` | - | `https://auth.example.com/oauth2/token` | The URL to which the user should be redirected to exchange the code for an access token. |
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| `HD_AUTH_OIDC_$NAME_USERINFO_URL` | - | `https://auth.example.com/oauth2/userinfo` | The URL to which the user should be redirected to get the user information. |
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| `HD_AUTH_OIDC_$NAME_SCOPE` | - | `profile` | The scope that should be requested to get the user information. |
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| `HD_AUTH_OIDC_$NAME_USER_ID_FIELD` | `sub` | `sub`, `id` | The unique identifier that is returned for the user from the OAuth2 provider. |
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| `HD_AUTH_OIDC_$NAME_USER_ID_FIELD` | `sub` | `sub`, `id` | The unique identifier that is returned for the user from the OAuth2 provider. |
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| `HD_AUTH_OIDC_$NAME_USER_NAME_FIELD` | `preferred_username` | `preferred_username`, `username` | The unique identifier that is returned for the user from the OAuth2 provider. |
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| `HD_AUTH_OIDC_$NAME_DISPLAY_NAME_FIELD` | `name` | `name`, `displayName` | The field that contains the display name of the user. |
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| `HD_AUTH_OIDC_$NAME_PROFILE_PICTURE_FIELD` | - | `picture`, `avatar` | The field that contains the URL to the profile picture of the user. |
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| `HD_AUTH_OIDC_$NAME_EMAIL_FIELD` | `email` | `email`, `mail` | The field that contains the email address of the user. |
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## Themes
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To integrate the brand colors and icons of some popular OIDC providers into the login button,
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you can use one of the following values:
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- `google`
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- `github`
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- `gitlab`
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- `facebook`
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- `discord`
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- `mastodon`
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- `azure`
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## Common providers
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| Provider | support | issuer variable | Docs |
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|-----------|-------------|---------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------|
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| Google | OIDC | `https://accounts.google.com` | [Google Docs](https://developers.google.com/identity/openid-connect/openid-connect) |
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| GitHub | only OAuth2 | `https://github.com` | [GitHub Docs](https://docs.github.com/en/developers/apps/building-oauth-apps/authorizing-oauth-apps) |
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| GitLab | OIDC | `https://gitlab.com` or your instance domain | [GitLab Docs](https://docs.gitlab.com/ee/integration/openid_connect_provider.html) |
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| Facebook | OIDC | `https://www.facebook.com` | [Facebook Docs](https://developers.facebook.com/docs/facebook-login/overview) |
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| Discord | only OAuth2 | `https://discord.com` | [Discord Docs](https://discord.com/developers/docs/topics/oauth2) |
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| Azure | OIDC | `https://login.microsoftonline.com/{tenant}/v2.0`, replace accordingly | [Azure OIDC](https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-protocols-oidc) |
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| Auth0 | OIDC | `https://{yourDomain}.us.auth0.com/`, replace accordingly | [Auth0 OIDC](https://auth0.com/docs/authenticate/protocols/openid-connect-protocol) |
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| Keycloak | OIDC | `https://keycloak.example.com/auth/realms/{realm}`, replace accordingly | [Keycloak Docs](https://www.keycloak.org/docs/latest/server_admin/#sso-protocols) |
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| Authentik | OIDC | `https://authentik.example.com/application/o/{app}/`, replace accordingly | [Authentik Docs](https://docs.goauthentik.io/docs/providers/oauth2/) |
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| Authelia | OIDC | `https://authelia.example.com`, replace accordingly | [Authelia Docs](https://www.authelia.com/integration/openid-connect/introduction/) |
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