#Filament SAML2

SAML 2.0 single sign-on for Filament v5 panels, powered by jeffersongoncalves/laravel-saml2. Every Identity Provider registered in laravel-saml2 (Entra ID, Okta, Google Workspace, Keycloak, ADFS, OneLogin…) gets a button on the panel login page; users are provisioned on first sign-in and linked to their SAML identity in a polymorphic table, so the host application's users table is never altered.

#Compatibility

#Installation

composer require jeffersongoncalves/filament-saml2:"^3.0"

Publish and run the migrations (saml2_tenants comes from laravel-saml2, saml2_identities from this plugin):

php artisan vendor:publish --tag="filament-saml2-migrations"
php artisan migrate

Optionally publish the configuration and translations:

php artisan vendor:publish --tag="filament-saml2-config"
php artisan vendor:publish --tag="filament-saml2-translations"

Register your Identity Providers with the laravel-saml2 commands, e.g.:

php artisan saml2:create-tenant --key=acme --metadata-url="https://idp.acme.com/metadata.xml"

See the laravel-saml2 README for the URLs to configure at the IdP, certificates, per-tenant settings and proxies.

#Registering the plugin in a panel

use JeffersonGoncalves\Filament\Saml2\Saml2Plugin;

public function panel(Panel $panel): Panel
{
    return $panel
        ->id('admin')
        ->path('admin')
        ->login()
        ->plugin(Saml2Plugin::make());
}

The login page now shows a Sign in with … button per tenant (labelled with metadata.name, the tenant key or the IdP entity ID).

#Options

Saml2Plugin::make()
    ->tenants(['acme', 'okta'])        // only these tenants (key or UUID); null = all
    ->guard('admin')                   // defaults to the panel auth guard
    ->userModel(\App\Models\Admin::class)
    ->autoCreateUsers(false)           // only let in users that already exist
    ->matchUsersByEmail(false)         // only link by NameID, never by e-mail
    ->position('before');              // buttons before the login form

#How it works

1. The button sends the user to saml2.login with returnTo set to the panel callback route (filament.{panel}.saml2.callback, path /{panel}/saml2/callback).
2. The IdP posts the assertion to laravel-saml2's ACS endpoint, which fires SignedIn.
3. The plugin listener reads the panel from the RelayState, resolves the user and logs them into the panel guard.
4. The ACS redirects to the callback route, which lands the user on the panel (or back on the login page with a notification if the sign-in was refused).

The panel travels in the RelayState rather than the session because the IdP posts cross-site and SameSite=Lax cookies are not sent with that request. SignedIn events whose RelayState is not a panel callback are ignored, so your own listeners keep working for the rest of the app.

For IdP-initiated sign-in, set the tenant relay_state_url to the panel callback path (/admin/saml2/callback).

#User resolution

1. The saml2_identities row for the tenant UUID + NameID.
2. resolveUserUsing(), when set.
3. The user with the same e-mail (Saml2User::email()), unless matchUsersByEmail(false).
4. A new user (name, email, random password), unless autoCreateUsers(false).

The identity is then created or refreshed with the latest e-mail and attributes.

Security: matching by e-mail trusts the IdP to only assert e-mails it owns. If a panel allows an IdP you do not control (e.g. a customer-managed tenant), limit it with ->tenants([...]) and disable matchUsersByEmail.

Add the HasSaml2Identities trait to expose the relation on your user model:

use JeffersonGoncalves\Filament\Saml2\Concerns\HasSaml2Identities;

class User extends Authenticatable
{
    use HasSaml2Identities;
}

#Customising user provisioning

use JeffersonGoncalves\LaravelSaml2\Saml2User;

Saml2Plugin::make()
    ->userAttributesUsing(fn (Saml2User $saml) => [
        'name' => $saml->mapped()['name'] ?? $saml->email(),
        'email' => $saml->email(),
        'department' => $saml->first('department'),
        'password' => bcrypt(\Illuminate\Support\Str::random(40)),
    ])
    ->resolveUserUsing(fn (Saml2User $saml) => \App\Models\User::query()
        ->where('employee_id', $saml->first('employeeNumber'))
        ->first()); // null falls back to the default lookup

#Logout

Filament's logout ends the local session. To also end the IdP session (Single Logout), send the user to laravel-saml2's logout route:

use JeffersonGoncalves\LaravelSaml2\Facades\Saml2;

redirect(Saml2::logoutUrl(returnTo: filament()->getLoginUrl()));

IdP-initiated logout is handled by laravel-saml2; set saml2.logout.guard to the panel guard.

#Testing

composer test

#Changelog

Please see CHANGELOG for more information on what has changed recently.

#Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

#Credits

• Jefferson Gonçalves
• All Contributors

#License

The MIT License (MIT). Please see License File for more information.