Symfony OIDC bundle

This bundle can be used to add OIDC support to any Symfony application. We have only tested it with SURFconext OIDC, but it should work with any OIDC provider!

Many thanks to https://github.com/jumbojett/OpenID-Connect-PHP for the implementation which this bundle uses although it has been modified to fix within an object oriented approach.

Note that this repository is automatically mirrored from our own Gitlab instance. We will accept issues and merge requests here though!

Version notes

Since version 2 this bundle only supports Symfony's new authentication manager, introduced in Symfony 5.3. As the security manager matured in Symfony 5.4, that is the first version this bundle supports. Using the new authentication manager is required for Symfony 6!

We also require the use of PHP8, as that significantly reduces the maintenance complexity.

Do you need this bundle, but you cannot enable the new authentication manager or use PHP8? Check out the v1.x branch and its documentation!

Works with the following IdPs

The following IdPs are known to work with this bundle:

IdP	Status	Remarks
OpenConext	✅	Used by SURFconext in the Netherlands
Keycloak	✅
Microsoft Entra ID	✅	Will not work with default configuration, make sure to follow these steps.

If you are using this bundle with any other IdP, please submit a PR to add it!

Migrate from older versions

Take a look at UPGRADE.md!

Installation

You can add this bundle by simply requiring it with composer:

composer require drenso/symfony-oidc-bundle

If you're using Symfony Flex, your .env file should have been appended with some environment variables and a drenso_oidc.yaml file should have been created in your configuration directory!

Setup

OIDC Clients

Make sure to configure at least the default OIDC client in the drenso_oidc.yaml in your config/packages directory. This can be done using the environment variables already added to your application by Symfony flex, or by updating the configuration file. You can configure more clients, they will be available under the drenso.oidc.client.{name}, and are autowirable by using OidcClientInterface ${name}OidcClient, for example OidcClientInterface $defaultOidcClient. If the name does not match with one of the configured clients, the default client will be autowired.

Configuration example:

drenso_oidc:
    #default_client: default # The default client, will be aliased to OidcClientInterface
    clients:
        default: # The client name, each client will be aliased to its name (for example, $defaultOidcClient)
            # Required OIDC client configuration
            well_known_url: '%env(OIDC_WELL_KNOWN_URL)%'
            client_id: '%env(OIDC_CLIENT_ID)%'
            client_secret: '%env(OIDC_CLIENT_SECRET)%'

            # Extra configuration options
            #well_known_parser: ~ # Service id for a custom well-known configuration parser
            #well_known_cache_time: 3600 # Time in seconds, will only be used when symfony/cache is available
            #jwks_cache_time: 3600 # Time in seconds, will only be used when symfony/cache is available
            #token_leeway_seconds: 300 # Leeway time in seconds when validating token validity
            #redirect_route: '/login_check'
            #custom_client_headers: []
            #code_challenge_method: ~ # Code challenge method, can be null, 'S256' or 'plain'
            #disable_nonce: false # Set to true when nonce verification should not be used

        # Add any extra client
        #link: # Will be accessible using $linkOidcClient
            #well_known_url: '%env(LINK_WELL_KNOWN_URL)%'
            #client_id: '%env(LINK_CLIENT_ID)%'
            #client_secret: '%env(LINK_CLIENT_SECRET)%'

User provider

You will need to update your User Provider to implement the methods from the OidcUserProviderInterface. Two methods need to be implemented:

• ensureUserExists(string $userIdentifier, OidcUserData $userData): Implement this method to bootstrap a new account using the data available from the passed OidcUserData object. The identifier is a configurable property from the user data, which defaults to sub. If the account cannot be bootstrapped, authentication will be impossible as the User Provider will not be capable of retrieving the user.
• loadOidcUser(string $userIdentifier): UserInterface: Implement this method to retrieve the user based on the identifier. We use a dedicated method instead of Symfony's default loadUserByIdentifier to allow you to detect where the login is coming from, without the need of creating a dedicated user provider. If the OIDC user identifiers are unique, a forward to the loadUserByIdentifier should be sufficient.

Firewall configuration

If you are using Symfony <6, make sure to enable the new authentication manager in the security.yaml:

security:
  enable_authenticator_manager: true

Enable the oidc listener in the security.yml for your firewall:

security:
  firewalls:
    main:
      pattern: ^/
      oidc: ~

There are a couple of options available for the oidc listener.

Option	Default	Description
check_path	/login_check	Only on this path the authenticator will accept authentication. Note that this should match with the redirect configured for the OIDC client.
login_path	/login	The path to forward to when authentication is required
client	default	The configured OIDC client to use
user_identifier_property	sub	The OidcUserData property to use as unique user identifier
user_identifier_from_idtoken	false	The identifier is fetched from the id_token instead of userinfo endpoint
enable_remember_me	false	Enable "remember me" functionality for authenticator
enable_end_session_listener	false	Enable "logout" functionality for authenticator through the "LogoutEvent"
use_logout_target_path	true	Used for the end session event subscriber
always_use_default_target_path	false	Used for the success handler
default_target_path	/	Used for the success handler
target_path_parameter	_target_path	Used for the success handler
use_referer	false	Used for the success handler
failure_path	null	Used for the failure handler
failure_forward	false	Used for the failure handler
failure_path_parameter	_failure_path	Used for the failure handler

You can configure them directly under the oidc listener in your firewall, for example the user_identifier_property:

security:
  firewalls:
    main:
      oidc:
        user_identifier_property: email

Start the authentication

Use the controller example below to forward a user to the OIDC service:

  /**
   * This controller forwards the user to the OIDC login
   *
   * @throws \Drenso\OidcBundle\Exception\OidcException
   */
  #[Route('/login_oidc', name: 'login_oidc')]
  #[IsGranted('PUBLIC_ACCESS')]
  public function surfconext(OidcClientInterface $oidcClient): RedirectResponse
  {
    // Redirect to authorization @ OIDC provider
    return $oidcClient->generateAuthorizationRedirect();
  }

It is possible to supply prompt, scopes and additional query parameters to the generateAuthorizationRedirect method.

It is also possible to force remember me mode for the redirect.

That should be all!

User identifier

By default, this bundle uses the sub property as user identifier, but any property from the retrieved user data can be used. Just configure the user_identifier_property with an property path string compatible with the Symfony Property Accessor to retrieve the value you need.

Note that the object based access method is used to retrieve the properties from the user data.

Remember me

If you want to enable remember me functionality make sure that you add the _remember_me=1 query parameter to the route being used to generate the redirect forward (the one that calls generateAuthorizationRedirect).

You can override the _remember_me parameter per OIDC client. Just update the remember_me_parameter value in the client configuration.

Lastly, make sure the Symfony remember me authenticator is enabled, and that you set the enable_remember_me option to true for the oidc authenticator in security.yaml.

When a user is authenticated, you will see the REMEMBERME cookie. You can remove the PHPSESSID cookie to check whether remember me is working.

Logout

It is possible to enable "logout" through the end_session_support functionality of the Identity Provider, if the end_session_endpoint parameter is present in the .well-known endpoint it can be used.

As logging out is fundamentally broken when using single sign-on, this option is disabled by default. This is due to the fact that logging out at the identity provider (for example: Azure, Facebook, etc) cannot guarantee the user is logged out of any other service that the user has authenticated with using the same identity provider.

If you want to enable the "logout" support, simply add enable_end_session_listener: true to your oidc listener in the firewall config. It will only work of you enabled the default Symfony logout: true setting in your firewall.

By default, the listener will pass the logout target_path to the OpenID Provider, so the user gets redirected back to your application after logging out. If you don't want this and want the user to remain at the logout confirmation page of your OpenID Provider, enable the use_logout_target_path: false setting.

Example: default logout path

security:
  firewalls:
    main:
      logout: true
      oidc:
        enable_end_session_listener: true

Example: custom logout target path

security:
  firewalls:
    main:
      logout:
        target: /my_custom_target_path
      oidc:
        enable_end_session_listener: true

Example: disable redirect to logout target_path

This will keep the user at the OpenID provider after login out.

security:
  firewalls:
    main:
      logout: true
      oidc:
        enable_end_session_listener: true
        use_logout_target_path: false

Client locator

If for some reason you have several OIDC clients configured and need to retrieve them dynamically, you can use the OidcClientLocator.

  public function surfconext(OidcClientLocator $clientLocator): RedirectResponse
  {
    return $clientLocator->getClient('your_client_id')->generateAuthorizationRedirect();
  }

The locator will throw an OidcClientNotFoundException when the requested client is not found. When called without an argument, it will return the configured default client.

Leeway

This bundle uses a 300 seconds leeway when validating the access tokens. This value can be configured with the token_leeway_seconds client option.

Cache

When you have symfony/cache available in your project, this library will automatically cache the well known and jwks results. By default, it will be cached for 3600 seconds.

You can disable the caches separately by passing null to the well_known_cache_time or jwks_cache_time client options.

Refreshing tokens

Currently, the firewall implementation provided by this bundle does not offer refresh tokens (as it should not be necessary). However, if you need to refresh the tokens yourself for your implementation, you can use the refreshTokens method on the OidcClientInterface!

Additional token claim validation

If you need to validate additional token claims, you can create a service which implements OidcTokenConstraintProviderInterface and add its service id to the OIDC client of your choice.

Sample configuration:

drenso_oidc:
    clients:
        default:
            additional_token_constraints_provider: App\Security\AdditionalTokenConstraintProvider

Sample constraint provider:

namespace App\Security;

use App\Security\Constraint\HasAudienceContaining;
use Drenso\OidcBundle\Enum\OidcTokenType;
use Drenso\OidcBundle\OidcTokenConstraintProviderInterface;

class AdditionalTokenConstraintProvider implements OidcTokenConstraintProviderInterface
{
    public function getAdditionalConstraints(OidcTokenType $tokenType): array
    {
        if (OidcTokenType::ID === $tokenType) {
            return [
                new HasAudienceContaining('abc123'),
            ];
        }

        if (OidcTokenType::ACCESS === $tokenType) {
            return [
                new HasAudienceContaining('def456'),
            ];
        }

        return [];
    }
}

Parsing well-known information

Some providers return incorrect or incomplete well known information. You can configure a custom well-known parser for the OidcClient by setting the well_known_parser to a service id which implements the OidcWellKnownParserInterface.

OAuth 2.0 Token Exchange RFC 8693

This bundle support Token Exchange: you can use the exchangeTokens on the OidcClient to do so. This was added with #66, which contains some more background information regarding the procedure as well.

Known usages

A list of open source projects that use this bundle:

• Zitadel's example-symfony-oidc: A template repository with basic OIDC authentication, user model, roles and example pages.