OpenID Connect Server

Contributors: wordpressdotorg, akirk, ashfame, psrpinto
Tags: oidc, oauth, openid, openid connect, oauth server
Requires at least: 6.0
Tested up to: 6.2
Requires PHP: 7.4
License: GPLv2
Stable tag: 1.3.3
GitHub Plugin URI: https://github.com/Automattic/wp-openid-connect-server

Use OpenID Connect to log in to other webservices using your own WordPress.

Description

With this plugin you can use your own WordPress install to authenticate with a webservice that provides OpenID Connect to implement Single-Sign On (SSO) for your users.

The plugin is currently only configured using constants and hooks as follows:

Define the RSA keys

If you don't have keys that you want to use yet, generate them using these commands:

openssl genrsa -out oidc.key 4096
openssl rsa -in oidc.key -pubout -out public.key

And make them available to the plugin as follows (this needs to be added before WordPress loads):

define( 'OIDC_PUBLIC_KEY', <<<OIDC_PUBLIC_KEY
-----BEGIN PUBLIC KEY-----
...
-----END PUBLIC KEY-----
OIDC_PUBLIC_KEY
);

define( 'OIDC_PRIVATE_KEY', <<<OIDC_PRIVATE_KEY
-----BEGIN PRIVATE KEY-----
...
-----END PRIVATE KEY-----
OIDC_PRIVATE_KEY
);

Alternatively, you can also put them outside the webroot and load them from the files like this:

define( 'OIDC_PUBLIC_KEY', file_get_contents( '/web-inaccessible/oidc.key' ) );
define( 'OIDC_PRIVATE_KEY', file_get_contents( '/web-inaccessible/private.key' ) );

Define the clients

Define your clients by adding a filter to oidc_registered_clients in a separate plugin file or functions.php of your theme or in a MU-plugin like:

add_filter( 'oidc_registered_clients', 'my_oidc_clients' );
function my_oidc_clients() {
	return array(
		'client_id_random_string' => array(
			'name' => 'The name of the Client',
			'secret' => 'a secret string',
			'redirect_uri' => 'https://example.com/redirect.uri',
			'grant_types' => array( 'authorization_code' ),
			'scope' => 'openid profile',
		),
	);
}

Exclude URL from caching

example.com/wp-json/openid-connect/userinfo: We implement caching exclusion measures for this endpoint by setting Cache-Control: 'no-cache' headers and defining the DONOTCACHEPAGE constant. If you have a unique caching configuration, please ensure that you manually exclude this URL from caching.

Github Repo

You can report any issues you encounter directly on Github repo: Automattic/wp-openid-connect-server

Changelog

1.3.3

Fix failing login when Authorize form is non-English [#108]
Improvements in site health tests for key detection [#104][#105]

1.3.2

Prevent userinfo endpoint from being cached [#99]

1.3.0

Return display_name as the name property [#87]
Change text domain to openid-connect-server, instead of wp-openid-connect-server [#88]

1.2.1

No user facing changes

1.2.0

Add oidc_user_claims filter [#82]

MariaMozgunova/wp-openid-connect-server