website/integrations: update/extend Gitea integration (#3946)

* website/docs: update/extend gitea integration

* website/docs: update/extend gitea integration / run prettier

* website/integrations: update/extend Gitea integration / switched to database based filtering

Co-authored-by: NWHirschfeld <git@nwhirschfeld.de>
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@ -13,7 +13,7 @@ Gitea is a community managed lightweight code hosting solution written in Go. It
::: :::
:::note :::note
This is based on authentik 2021.10.3 and Gitea 1.16.0+rc1 installed using https://docs.gitea.io/en-us/install-from-binary/. Instructions may differ between versions. This is based on authentik 2022.10.1 and Gitea 1.17.3 installed using the official docker image [https://docs.gitea.io/en-us/install-with-docker/](https://docs.gitea.io/en-us/install-with-docker/). Instructions may differ between versions.
::: :::
## Preparation ## Preparation
@ -25,7 +25,7 @@ The following placeholders will be used:
### Step 1 ### Step 1
In authentik, create an _OAuth2/OpenID Provider_ (under _Resources/Providers_) with these settings: In authentik, create an _OAuth2/OpenID Provider_ (under _Applications/Providers_) with these settings:
:::note :::note
Only settings that have been modified from default have been listed. Only settings that have been modified from default have been listed.
@ -42,7 +42,7 @@ Take note of the `Client ID` and `Client Secret`, you'll need to give them to Gi
### Step 2 ### Step 2
In authentik, create an application (under _Resources/Applications_) which uses this provider. Optionally apply access restrictions to the application using policy bindings. In authentik, create an application (under _Applications/Applications_) which uses this provider. Optionally apply access restrictions to the application using policy bindings.
:::note :::note
Only settings that have been modified from default have been listed. Only settings that have been modified from default have been listed.
@ -62,7 +62,7 @@ Change the following fields
- OAuth2 Provider: OpenID Connect - OAuth2 Provider: OpenID Connect
- Client ID (Key): Step 1 - Client ID (Key): Step 1
- Client Secret: Step 1 - Client Secret: Step 1
- Icon URL: https://goauthentik.io/img/icon.png - Icon URL: https://authentik.company/static/dist/assets/icons/icon.svg
- OpenID Connect Auto Discovery URL: https://authentik.company/application/o/gitea-slug/.well-known/openid-configuration - OpenID Connect Auto Discovery URL: https://authentik.company/application/o/gitea-slug/.well-known/openid-configuration
- Additional Scopes: `email profile` - Additional Scopes: `email profile`
@ -70,6 +70,85 @@ Change the following fields
`Add Authentication Source` and you should be done. Your Gitea login page should now have a `Sign in With` followed by the authentik logo which you can click on to sign-in to Gitea with Authentik creds. `Add Authentication Source` and you should be done. Your Gitea login page should now have a `Sign in With` followed by the authentik logo which you can click on to sign-in to Gitea with Authentik creds.
### Step 4 _(optional Claims for authorization management)_
:::note
This step is **optional** and shows how to set claims to control the permissions of users in gitea by adding them to groups.
:::
#### Define Groups
The following groups will be used:
- `gituser` for normal Gitea users.
- `gitadmin` for Gitea users with administrative permissions.
- `gitrestricted` for restricted Gitea users.
:::note
Users who are in none of these groups will not be able to log in to gitea.
:::
In authentik, create three groups (under _Directory/Groups_) with the _Name_ as mentioned above and leave other settings untouched.
:::note
You can add Members to the groups now or anytime later.
:::
#### Create Custom Property Mapping
In authentik, create a custom property mapping (under _Customization/Property Mappings_) which has the type **Scope Mapping**.
:::note
Only settings that have been modified from default have been listed.
:::
- Name: authentik gitea OAuth Mapping: OpenID 'gitea'
- Scope name: gitea
And as **Expression** set the following:
```(python)
gitea_claims = {}
if request.user.ak_groups.filter(name="gituser").exists():
gitea_claims["gitea"]= "user"
if request.user.ak_groups.filter(name="gitadmin").exists():
gitea_claims["gitea"]= "admin"
if request.user.ak_groups.filter(name="gitrestricted").exists():
gitea_claims["gitea"]= "restricted"
return gitea_claims
```
#### Add the custom Property Mapping to the Gitea Provider
In authentik, edit the **Gitea** provider (under _Applications/Providers_) by clicking the pencil Icon.
Unfold the _Advanced protocol settings_ and activate these Mappings:
- authentik default OAuth Mapping: OpenID 'email'
- authentik default OAuth Mapping: OpenID 'profile'
- authentik default OAuth Mapping: OpenID 'openid'
- authentik gitea OAuth Mapping: OpenID 'gitea'
Click `Update` and the configuration authentik is done.
#### Configure Gitea to use the new claims
Navigate to the _Authentication Sources_ page at https://gitea.company/admin/auths and edit the **authentik** Authentication Source.
Change the following fields
- Additional Scopes: `email profile gitea`
- Required Claim Name: `gitea`
- Claim name providing group names for this source. (Optional): `gitea`
- Group Claim value for administrator users. (Optional - requires claim name above): `admin`
- Group Claim value for restricted users. (Optional - requires claim name above): `restricted`
`Update Authentication Source` and you should be done.
Users without any of the defined groups should no longer be able to log in.
Users of the group **gitadmin** should have administrative privileges, and users in the group **gitrestricted** should be restricted.
## Helm Chart Configuration ## Helm Chart Configuration
authentik can be configured automatically in Gitea Kubernetes deployments via it's [Helm Chart](https://gitea.com/gitea/helm-chart/). authentik can be configured automatically in Gitea Kubernetes deployments via it's [Helm Chart](https://gitea.com/gitea/helm-chart/).