README

OneLogin SAML Bundle for Symfony. (https://github.com/onelogin/php-saml)

This bundle supports Symfony 5 and earlier.
For newer Symfony versions you can use nbgrp/onelogin-saml-bundle.

Installation

Install with composer

composer require hslavich/oneloginsaml-bundle

Enable the bundle in config/bundles.php (if you don't use Symfony Flex)

return [
    // ...
    Hslavich\OneloginSamlBundle\HslavichOneloginSamlBundle::class => ['all' => true],
]

Configuration

Configure SAML metadata in config/packages/hslavich_onelogin_saml.yaml. Check https://github.com/onelogin/php-saml#settings for more info.

hslavich_onelogin_saml:
    # Basic settings
    idp:
        entityId: 'http://id.example.com/saml2/idp/metadata.php'
        singleSignOnService:
            url: 'http://id.example.com/saml2/idp/SSOService.php'
            binding: 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect'
        singleLogoutService:
            url: 'http://id.example.com/saml2/idp/SingleLogoutService.php'
            binding: 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect'
        x509cert: ''
    sp:
        entityId: 'http://myapp.com/app_dev.php/saml/metadata'
        assertionConsumerService:
            url: 'http://myapp.com/app_dev.php/saml/acs'
            binding: 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST'
        singleLogoutService:
            url: 'http://myapp.com/app_dev.php/saml/logout'
            binding: 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect'
        privateKey: ''    
    # Optional settings
    baseurl: 'http://myapp.com'
    strict: true
    debug: true    
    security:
        nameIdEncrypted: false
        authnRequestsSigned: false
        logoutRequestSigned: false
        logoutResponseSigned: false
        wantMessagesSigned: false
        wantAssertionsSigned: false
        wantNameIdEncrypted: false
        requestedAuthnContext: true
        signMetadata: false
        wantXMLValidation: true
        relaxDestinationValidation: false
        destinationStrictlyMatches: true
        rejectUnsolicitedResponsesWithInResponseTo: false
        signatureAlgorithm: 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256'
        digestAlgorithm: 'http://www.w3.org/2001/04/xmlenc#sha256'
    contactPerson:
        technical:
            givenName: 'Tech User'
            emailAddress: 'techuser@example.com'
        support:
            givenName: 'Support User'
            emailAddress: 'supportuser@example.com'
        administrative:
            givenName: 'Administrative User'
            emailAddress: 'administrativeuser@example.com'
    organization:
        en:
            name: 'Example'
            displayname: 'Example'
            url: 'http://example.com'

If you don't want to set contactPerson or organization, don't add those parameters instead of leaving them blank.

Configure firewall and user provider in config/packages/security.yaml

security:
    # ...

    providers:
        saml_provider:
            # Basic provider instantiates a user with default roles
            saml:
                user_class: 'AppBundle\Entity\User'
                default_roles: ['ROLE_USER']

    firewalls:
        app:
            pattern: ^/
            saml:
                # Match SAML attribute 'uid' with username.
                # Uses getNameId() method by default.
                username_attribute: uid
                # Use the attribute's friendlyName instead of the name 
                use_attribute_friendly_name: true
                check_path: saml_acs
                login_path: saml_login
            logout:
                path: saml_logout

    access_control:
        - { path: ^/saml/login, roles: PUBLIC_ACCESS }
        - { path: ^/saml/metadata, roles: PUBLIC_ACCESS }
        - { path: ^/, roles: ROLE_USER }

Edit your config/routing or config/routes.yaml depending on your Symfony version.

hslavich_saml_sp:
    resource: "@HslavichOneloginSamlBundle/Resources/config/routing.yml"

Inject SAML attributes into User object (Optional)

Your user class must implement SamlUserInterface

<?php

namespace App\Entity;

use Hslavich\OneloginSamlBundle\Security\User\SamlUserInterface;

class User implements SamlUserInterface
{
    protected $username;
    protected $email;

    // ...

    public function setSamlAttributes(array $attributes)
    {
        $this->email = $attributes['mail'][0];
    }
}

Then you can get attributes from user object

$email = $this->getUser()->getEmail();

Integration with classic login form

You can integrate SAML authentication with traditional login form by editing your security.yaml:

security:
    enable_authenticator_manager: true

    providers:
        user_provider:
            # Loads user from user repository
            entity:
                class: App:User
                property: username

    firewalls:
        default:
            saml:
                username_attribute: uid
                check_path: saml_acs
                login_path: saml_login
                failure_path: saml_login
                always_use_default_target_path: true

            # Traditional login form
            form_login:
                login_path: /login
                check_path: /login_check
                always_use_default_target_path: true

            logout:
                path: saml_logout

Then you can add a link to route saml_login in your login page in order to start SAML sign on.

    <a href="{{ path('saml_login') }}">SAML Login</a>

Just-in-time user provisioning (optional)

It's possible to have a new user provisioned based off the received SAML attributes when the user provider cannot find a user.

Edit firewall settings in security.yaml:

security:
    # ...

    providers:
        saml_provider:
            # Loads user from user repository
            entity:
                class: App\Entity\User
                property: username

    firewalls:
        default:
            provider: saml_provider
            saml:
                username_attribute: uid
                # User factory service
                user_factory: my_user_factory
            logout:
                path: saml_logout

In order for a user to be provisioned, you must use a user provider that throws UserNotFoundException (e.g. EntityUserProvider as used in the example above). The SamlUserProvider does not throw this exception which will cause an empty user to be returned when a matching user cannot be found.

Create the user factory service editing services.yaml:

services:
    my_user_factory:
        class: Hslavich\OneloginSamlBundle\Security\User\SamlUserFactory
        arguments:
            # User class
            - App\Entity\User
            # Attribute mapping.
            - password: 'notused'
              email: $mail
              name: $cn
              lastname: $sn
              roles: ['ROLE_USER']

Fields with '$' references to SAML attribute value.

Or you can create your own User Factory that implements SamlUserFactoryInterface

<?php

namespace App\Security;

use App\Entity\User;
use Hslavich\OneloginSamlBundle\Security\Authentication\Token\SamlTokenInterface;
use Hslavich\OneloginSamlBundle\Security\User\SamlUserFactoryInterface;
use Symfony\Component\Security\Core\User\UserInterface;

class UserFactory implements SamlUserFactoryInterface
{
    public function createUser($username, array $attributes = []): UserInterface
    {
        $user = new User();
        $user->setRoles(['ROLE_USER']);
        $user->setUsername($username);
        $user->setPassword('notused');
        $user->setEmail($attributes['mail'][0]);
        $user->setName($attributes['cn'][0]);
    
        return $user;
    }
}

services:
    my_user_factory:
        class: App\Security\UserFactory

For versions prior to 2.1 the createUser signature was different:

public function createUser(SamlTokenInterface $token): UserInterface
{
    $username = $token->getUsername();
    $attributes = $token->getAttributes();
    ...
}

Persist user on creation and SAML attributes injection (Optional)

Symfony EventDispatcher component and Doctrine ORM are required.

Edit firewall settings in security.yaml:

security:
    # ...

    firewalls:
        # ...

        default:
            saml:
                # ...
                persist_user: true

To use non-default entity manager specify it name by hslavich_onelogin_saml.entityManagerName config option.

User persistence is performing by event listeners Hslavich\OneloginSamlBundle\EventListener\User\UserCreatedListener and Hslavich\OneloginSamlBundle\EventListener\User\UserModifiedListener that can be decorated if necessary to override the default behavior. Also, you can make your own listeners for Hslavich\OneloginSamlBundle\Event\UserCreatedEvent and Hslavich\OneloginSamlBundle\Event\UserModifiedEvent events.