Nextcloud

Tested Versions#

• Authelia
  • v4.38.0
• Nextcloud
  • 22.1.0 with the application oidc_login
  • 28.0.4 with the application user_oidc

Before You Begin#

Common Notes#

1. The OpenID Connect 1.0 client_id parameter:
   1. This must be a unique value for every client.
   2. The value used in this guide is merely for readability and demonstration purposes and you should not use this value in production and should instead utilize the How do I generate a client identifier or client secret? FAQ. We recommend 64 random characters but you can use any arbitrary value that meets the other criteria.
   3. This must only contain RFC3986 Unreserved Characters.
   4. This must be no more than 100 characters in length.
2. The OpenID Connect 1.0 client_secret parameter:
   1. The value used in this guide is merely for demonstration purposes and you should absolutely not use this value in production and should instead utilize the How do I generate a client identifier or client secret? FAQ.
   2. This string may be stored as plaintext in the Authelia configuration but this behaviour is deprecated and is not guaranteed to be supported in the future. See the Plaintext guide for more information.
   3. When the secret is stored in hashed form in the Authelia configuration (heavily recommended), the cost of hashing can, if too great, cause timeouts for clients. See the Tuning the work factors guide for more information.
3. The configuration example for Authelia:
   1. Only contains an example configuration for the client registration and you MUST also configure the required elements from the OpenID Connect 1.0 Provider Configuration guide.
   2. Only contains a small portion of all of the available options for a registered client and users may wish to configure portions that are not part of this guide or configure them differently, as such it’s important to both familiarize yourself with the other options available and the effect of each of the options configured in this section by looking at the OpenID Connect 1.0 Clients Configuration guide.

Assumptions#

This example makes the following assumptions:

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

Important Note: it has been reported that some of the Nextcloud plugins do not properly encode the client secret. as such it’s important to only use alphanumeric characters as well as the other RFC3986 Unreserved Characters. We recommend using the generating client secrets guidance above.

Available Options#

The following two tested options exist for Nextcloud:

1. OpenID Connect Login App
2. OpenID Connect user backend App

OpenID Connect Login App#

The following example uses the OpenID Connect Login App app.

Configuration#

Authelia#

The following YAML configuration is an example Authelia client configuration for use with Nextcloud which will operate with the application 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:
      - client_id: 'nextcloud'
        client_name: 'NextCloud'
        client_secret: '$pbkdf2-sha512$310000$c8p78n7pUMln0jzvd4aK4Q$JNRBzwAo0ek5qKn50cFzzvE9RXV88h1wJn5KGiHrD0YKtZaR/nCb2CJPOsKaPK0hjf.9yHxzQGZziziccp6Yng'  # The digest of 'insecure_secret'.
        public: false
        authorization_policy: 'two_factor'
        require_pkce: true
        pkce_challenge_method: 'S256'
        redirect_uris:
          - 'https://nextcloud.example.com/apps/oidc_login/oidc'
        scopes:
          - 'openid'
          - 'profile'
          - 'email'
          - 'groups'
        userinfo_signed_response_alg: 'none'
        token_endpoint_auth_method: 'client_secret_basic'

Application#

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

1. Install the Nextcloud OpenID Connect Login app
2. Add the following to the Nextcloud config.php configuration:

$CONFIG = array (
    'allow_user_to_change_display_name' => false,
    'lost_password_link' => 'disabled',
    'oidc_login_provider_url' => 'https://auth.example.com',
    'oidc_login_client_id' => 'nextcloud',
    'oidc_login_client_secret' => 'insecure_secret',
    'oidc_login_auto_redirect' => false,
    'oidc_login_end_session_redirect' => false,
    'oidc_login_button_text' => 'Log in with Authelia',
    'oidc_login_hide_password_form' => false,
    'oidc_login_use_id_token' => true,
    'oidc_login_attributes' => array (
        'id' => 'preferred_username',
        'name' => 'name',
        'mail' => 'email',
        'groups' => 'groups',
    ),
    'oidc_login_default_group' => 'oidc',
    'oidc_login_use_external_storage' => false,
    'oidc_login_scope' => 'openid profile email groups',
    'oidc_login_proxy_ldap' => false,
    'oidc_login_disable_registration' => true,
    'oidc_login_redir_fallback' => false,
    'oidc_login_tls_verify' => true,
    'oidc_create_groups' => false,
    'oidc_login_webdav_enabled' => false,
    'oidc_login_password_authentication' => false,
    'oidc_login_public_key_caching_time' => 86400,
    'oidc_login_min_time_between_jwks_requests' => 10,
    'oidc_login_well_known_caching_time' => 86400,
    'oidc_login_update_avatar' => false,
    'oidc_login_code_challenge_method' => 'S256'
);

OpenID Connect user backend App#

The following example uses the OpenID Connect user backend app.

Configuration#

Authelia#

The following YAML configuration is an example Authelia client configuration for use with Nextcloud which will operate with the application 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:
      - client_id: 'nextcloud'
        client_name: 'NextCloud'
        client_secret: 'insecure_secret'
        public: false
        authorization_policy: 'two_factor'
        require_pkce: true
        pkce_challenge_method: 'S256'
        redirect_uris:
          - 'https://nextcloud.example.com/apps/user_oidc/code'
        scopes:
          - 'openid'
          - 'profile'
          - 'email'
          - 'groups'
        userinfo_signed_response_alg: 'none'
        token_endpoint_auth_method: 'client_secret_post'

Application#

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

1. Install the Nextcloud OpenID Connect user backend app
2. Edit the ‘OpenID Connect’ configuration:

• Identifier : Authelia
• Client ID : nextcloud
• Client secret : insecure_secret
• Discovery endpoint : https://auth.example.com/.well-known/openid-configuration
• Scope : openid email profile

3. Add the following to the Nextcloud config.php configuration:

'user_oidc' => [
    'use_pkce' => true,
],

See Also#

• Nextcloud OpenID Connect user backend app
• Nextcloud OpenID Connect Login app
• Nextcloud OpenID Connect Login Documentation