authelia

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GitLab

Integrating GitLab with the Authelia OpenID Connect Provider.

2022-06-15T17:51:47+10:00

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integration

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openid-connect

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Tested Versions

Authelia
- v4.35.5
GitLab CE
- 14.0.1

Before You Begin

Assumptions

This example makes the following assumptions:

Application Root URL: https://gitlab.example.com
Authelia Root URL: https://auth.example.com
Client ID: gitlab
Client Secret: insecure_secret

Configuration

Application

To configure GitLab to utilize Authelia as an OpenID Connect 1.0 Provider:

Add the Omnibus OpenID Connect 1.0 OmniAuth configuration to gitlab.rb:

gitlab_rails['omniauth_providers'] = [
  {
    name: "openid_connect",
    label: "Authelia",
    icon: "https://www.authelia.com/images/branding/logo-cropped.png",
    args: {
      name: "openid_connect",
      scope: ["openid","profile","email","groups"],
      response_type: "code",
      issuer: "https://auth.example.com",
      discovery: true,
      client_auth_method: "query",
      uid_field: "preferred_username",
      send_scope_to_token_endpoint: "false",
      client_options: {
        identifier: "gitlab",
        secret: "insecure_secret",
        redirect_uri: "https://gitlab.example.com/users/auth/openid_connect/callback"
      }
    }
  }
]

Authelia

The following YAML configuration is an example Authelia client configuration for use with GitLab which will operate with the above example:

identity_providers:
  oidc:
    ## The other portions of the mandatory OpenID Connect 1.0 configuration go here.
    ## See: https://www.authelia.com/c/oidc
    clients:
    - id: 'gitlab'
      description: 'GitLab'
      secret: '$pbkdf2-sha512$310000$c8p78n7pUMln0jzvd4aK4Q$JNRBzwAo0ek5qKn50cFzzvE9RXV88h1wJn5KGiHrD0YKtZaR/nCb2CJPOsKaPK0hjf.9yHxzQGZziziccp6Yng'  # The digest of 'insecure_secret'.
      public: false
      authorization_policy: 'two_factor'
      redirect_uris:
        - 'https://gitlab.example.com/users/auth/openid_connect/callback'
      scopes:
        - 'openid'
        - 'profile'
        - 'groups'
        - 'email'
      userinfo_signing_algorithm: 'none'

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