OpenId Connect for ownCloud

Configuration

General

A distributed memcache setup is required to properly operate this app - like Redis or memcached. For development purpose APCu is reasonable as well. Please follow the documentation on how to set up caching.

Setup config.php

The OpenId integration is established by entering the parameters below to the ownCloud configuration file. provider-url, client-id and _client-secret- are to be taken from the OpenId Provider setup. loginButtonName can be chosen freely depending on the installation.

<?php
$CONFIG = [
  'openid-connect' => [
	'provider-url' => 'https://idp.example.net',
	'client-id' => 'fc9b5c78-ec73-47bf-befc-59d4fe780f6f',
	'client-secret' => 'e3e5b04a-3c3c-4f4d-b16c-2a6e9fdd3cd1',
	'loginButtonName' => 'OpenId Connect'
  ]
];

The above configuration assumes that the OpenId Provider is supporting service discovery. If not the endpoint configuration has to be done manually as follows:

<?php
$CONFIG = [
  'openid-connect' => [
    'provider-url' => 'https://idp.example.net',
    'client-id' => 'fc9b5c78-ec73-47bf-befc-59d4fe780f6f',
    'client-secret' => 'e3e5b04a-3c3c-4f4d-b16c-2a6e9fdd3cd1',
    'loginButtonName' => 'OpenId Connect',
    'provider-params' => [
      'authorization_endpoint' => '...',
      'token_endpoint' => '...',
      'token_endpoint_auth_methods_supported' => '...',
      'userinfo_endpoint' => '...',
      'registration_endpoint' => '...',
      'end_session_endpoint' => '...',
      'jwks_uri' => '...'
    ]
  ]
];

Setup within the OpenId Provider

When registering ownCloud as OpenId Client use https://cloud.example.net/index.php/apps/openidconnect/redirect as redirect url .

In case OpenID Connect Front-Channel Logout 1.0 is supported please enter https://cloud.example.net/index.php/apps/openidconnect/logout as logout url within the client registration of the OpenId Provider. We require frontchannel_logout_session_required to be true.

Setup service discovery

In order to allow other clients to use OpenID Connect when talking to ownCloud please setup a redirect on the web server to point .well-known/openid-configuration to /index.php/apps/openidconnect/config

This is an .htaccess example

  RewriteRule ^\.well-known/openid-configuration /index.php/apps/openidconnect/config [R=301,L]

Please note that service discovery is not mandatory at the moment since no client is supporting this yet.

How to setup an IdP for development and test purpose

There are various Open Source IdPs out there. The one with the most features implemented seems to be panva/node-oidc-provider.

To set it up locally do the following:

1. Clone panva/node-oidc-provider
2. yarn install
3. cd example
4. Add client config into https://github.com/panva/node-oidc-provider/blob/master/example/support/configuration.js#L14

   module.exports.clients = [
     {
       client_id: 'ownCloud',
       client_secret: 'ownCloud',
       grant_types: ['refresh_token', 'authorization_code'],
       redirect_uris: ['http://localhost:8080/index.php/apps/openidconnect/redirect'],
       frontchannel_logout_uri: 'http://localhost:8080/index.php/apps/openidconnect/logout'
     }
   ];
   

5. Start the IdP via: node standalone.js
6. Open in browser: http://localhost:3000/.well-known/openid-configuration
7. ownCloud configuration looks as follows:

   $CONFIG = [
     'openid-connect' => [
         'provider-url' => 'http://localhost:3000',
         'client-id' => 'ownCloud',
         'client-secret' => 'ownCloud',
         'loginButtonName' => 'node-oidc-provider',
         'mode' => 'userid',
         'search-attribute' => 'sub',
         'use-token-introspection-endpoint' => true
     ],
   ];
   
   

8. Clients can now use http://localhost:3000/.well-known/openid-configuration to obtain all information which is necessary to initiate the OpenId Connect flow. Use the granted access token in any request to ownCloud within a bearer authentication header.
9. You can login with any credentials but you need to make sure that the user with the given user id exists. In a real world deployment the users will come from LDAP.
   Keep in mind that by default, oidc app will search for the email attribute - which is hardcoded to johndoe@example.com ref If you wish to map the login name on the oidc-provider with owncloud user ids, you can configure it as following:

    $CONFIG = [
      'openid-connect' => [
        'search-attribute' => 'sub',
        'mode' => 'userid',
      ]