The SecurityBundle integrates the :doc:`Security component </security>`
in Symfony applications. All these options are configured under the security
key in your application configuration.
# displays the default config values defined by Symfony
$ php bin/console config:dump-reference security
# displays the actual config values used by your application
$ php bin/console debug:config security
Note
When using XML, you must use the http://symfony.com/schema/dic/security
namespace and the related XSD schema is available at:
https://symfony.com/schema/dic/services/services-1.0.xsd
Basic Options:
Advanced Options:
Some of these options define tens of sub-options and they are explained in separate articles:
- access_control
- :ref:`hashers <passwordhasher-supported-algorithms>`
- firewalls
- providers
- role_hierarchy
type: string
default: null
Defines the URL where the user is redirected after a 403
HTTP error (unless
you define a custom access denial handler). Example: /no-permission
type: array
default: []
Lists the names (and other optional features) of the cookies to delete when the user logs out:
.. configuration-block::
# config/packages/security.yaml security: # ... firewalls: main: # ... logout: delete_cookies: cookie1-name: null cookie2-name: path: '/' cookie3-name: path: null domain: example.com<!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd"> <config> <!-- ... --> <firewall name="main"> <!-- ... --> <logout path="..."> <delete-cookie name="cookie1-name"/> <delete-cookie name="cookie2-name" path="/"/> <delete-cookie name="cookie3-name" domain="example.com"/> </logout> </firewall> </config> </srv:container>// config/packages/security.php // ... return static function (SecurityConfig $securityConfig): void { // ... $securityConfig->firewall('main') ->logout() ->deleteCookie('cookie1-name') ->deleteCookie('cookie2-name') ->path('/') ->deleteCookie('cookie3-name') ->path(null) ->domain('example.com'); };
type: boolean
default: true
If true
, the eraseCredentials()
method of the user object is called
after authentication.
type: boolean
default: true
If true
, when a user is not found a generic exception of type
:class:`Symfony\\Component\\Security\\Core\\Exception\\BadCredentialsException`
is thrown with the message "Bad credentials".
If false
, the exception thrown is of type
:class:`Symfony\\Component\\Security\\Core\\Exception\\UserNotFoundException`
and it includes the given not found user identifier.
type: string
default: SessionAuthenticationStrategy::MIGRATE
Session Fixation is a security attack that permits an attacker to hijack a valid user session. Applications that don't assign new session IDs when authenticating users are vulnerable to this attack.
The possible values of this option are:
NONE
constant from :class:`Symfony\\Component\\Security\\Http\\Session\\SessionAuthenticationStrategy` Don't change the session after authentication. This is not recommended.MIGRATE
constant from :class:`Symfony\\Component\\Security\\Http\\Session\\SessionAuthenticationStrategy` The session ID is updated, but the rest of session attributes are kept.INVALIDATE
constant from :class:`Symfony\\Component\\Security\\Http\\Session\\SessionAuthenticationStrategy` The entire session is regenerated, so the session ID is updated but all the other session attributes are lost.
Defines the security protection of the URLs of your application. It's used for example to trigger the user authentication when trying to access to the backend and to allow unauthenticated users to the login form page.
This option is explained in detail in :doc:`/security/access_control`.
This is arguably the most important option of the security config file. It defines the authentication mechanism used for each URL (or URL pattern) of your application:
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: # 'main' is the name of the firewall (can be chosen freely) main: # 'pattern' is a regular expression matched against the incoming # request URL. If there's a match, authentication is triggered pattern: ^/admin # the rest of options depend on the authentication mechanism # ... .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <!-- ... --> <!-- 'pattern' is a regular expression matched against the incoming request URL. If there's a match, authentication is triggered --> <firewall name="main" pattern="^/admin"> <!-- the rest of options depend on the authentication mechanism --> <!-- ... --> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { // ... // 'main' is the name of the firewall (can be chosen freely) $security->firewall('main') // 'pattern' is a regular expression matched against the incoming // request URL. If there's a match, authentication is triggered ->pattern('^/admin') // the rest of options depend on the authentication mechanism // ... ; };
.. seealso:: Read :doc:`this article </security/firewall_restriction>` to learn about how to restrict firewalls by host and HTTP methods.
In addition to some common config options, the most important firewall options depend on the authentication mechanism, which can be any of these:
# config/packages/security.yaml
security:
# ...
firewalls:
main:
# ...
x509:
# ...
remote_user:
# ...
guard:
# ...
form_login:
# ...
form_login_ldap:
# ...
json_login:
# ...
http_basic:
# ...
http_basic_ldap:
# ...
http_digest:
# ...
You can view actual information about the firewalls in your application with
the debug:firewall
command:
# displays a list of firewalls currently configured for your application
$ php bin/console debug:firewall
# displays the details of a specific firewall
$ php bin/console debug:firewall main
# displays the details of a specific firewall, including detailed information
# about the event listeners for the firewall
$ php bin/console debug:firewall main --events
When using the form_login
authentication listener beneath a firewall,
there are several common options for configuring the "form login" experience.
For even more details, see :doc:`/security/form_login`.
type: string
default: /login
This is the route or path that the user will be redirected to (unless use_forward
is set to true
) when they try to access a protected resource but aren't
fully authenticated.
This path must be accessible by a normal, unauthenticated user, else you might create a redirect loop.
type: string
default: /login_check
This is the route or path that your login form must submit to. The firewall
will intercept any requests (POST
requests only, by default) to this
URL and process the submitted login credentials.
Be sure that this URL is covered by your main firewall (i.e. don't create
a separate firewall just for check_path
URL).
type: string
default: /login
This is the route or path that the user is redirected to after a failed login attempt. It can be a relative/absolute URL or a Symfony route name.
type: boolean
default: false
Set this option to true
to require that the login data is sent using a form
(it checks that the request content-type is application/x-www-form-urlencoded
).
This is useful for example to prevent the :ref:`form login authenticator <security-form-login>`
from responding to requests that should be handled by the
:ref:`JSON login authenticator <security-json-login>`.
type: boolean
default: false
If you'd like the user to be forwarded to the login form instead of being
redirected, set this option to true
.
type: string
default: _username
This is the name of the username field of your
login form. When you submit the form to check_path
, the security system
will look for a POST parameter with this name.
type: string
default: _password
This is the name of the password field of your
login form. When you submit the form to check_path
, the security system
will look for a POST parameter with this name.
type: boolean
default: true
By default, you must submit your login form to the check_path
URL as
a POST request. By setting this option to false
, you can send a GET
request too.
Options Related to Redirecting after Login
type: boolean
default: false
If true
, users are always redirected to the default target path regardless
of the previous URL that was stored in the session.
type: string
default: /
The page users are redirected to when there is no previous page stored in the session (for example, when the users browse the login page directly).
type: string
default: _target_path
When using a login form, if you include an HTML element to set the target path, this option lets you change the name of the HTML element itself.
type: string
default: _failure_path
When using a login form, if you include an HTML element to set the failure path, this option lets you change the name of the HTML element itself.
type: boolean
default: false
If true
, the user is redirected to the value stored in the HTTP_REFERER
header when no previous URL was stored in the session. If the referrer URL is
the same as the one generated with the login_path
route, the user is
redirected to the default_target_path
to avoid a redirection loop.
Note
For historical reasons, and to match the misspelling of the HTTP standard,
the option is called use_referer
instead of use_referrer
.
You can configure logout options.
type: array
default: []
Lists the names (and other optional features) of the cookies to delete when the user logs out:
.. configuration-block::
# config/packages/security.yaml security: # ... firewalls: main: # ... logout: delete_cookies: cookie1-name: null cookie2-name: path: '/' cookie3-name: path: null domain: example.com<!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd"> <config> <!-- ... --> <firewall name="main"> <!-- ... --> <logout path="..."> <delete-cookie name="cookie1-name"/> <delete-cookie name="cookie2-name" path="/"/> <delete-cookie name="cookie3-name" domain="example.com"/> </logout> </firewall> </config> </srv:container>// config/packages/security.php // ... return static function (SecurityConfig $securityConfig): void { // ... $securityConfig->firewall('main') ->logout() ->deleteCookie('cookie1-name') ->deleteCookie('cookie2-name') ->path('/') ->deleteCookie('cookie3-name') ->path(null) ->domain('example.com'); };
type: array
default: []
The Clear-Site-Data
HTTP header clears browsing data (cookies, storage, cache)
associated with the requesting website. It allows web developers to have more
control over the data stored by a client browser for their origins.
Allowed values are cache
, cookies
, storage
and executionContexts
.
It's also possible to use *
as a wildcard for all directives:
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: main: # ... logout: clear_site_data: - cookies - storage .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd"> <config> <!-- ... --> <firewall name="main"> <!-- ... --> <logout> <clear-site-data>cookies</clear-site-data> <clear-site-data>storage</clear-site-data> </logout> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php // ... return static function (SecurityConfig $securityConfig): void { // ... $securityConfig->firewall('main') ->logout() ->clearSiteData(['cookies', 'storage']); };
type: boolean
default: true
By default, when users log out from any firewall, their sessions are invalidated. This means that logging out from one firewall automatically logs them out from all the other firewalls.
The invalidate_session
option allows to redefine this behavior. Set this
option to false
in every firewall and the user will only be logged out from
the current firewall and not the other ones.
type: string
default: /logout
The path which triggers logout. You need to set up a route with a matching path.
type: string
default: /
The relative path (if the value starts with /
), or absolute URL (if it
starts with http://
or https://
) or the route name (otherwise) to
redirect after logout.
type: boolean
default: null
Set this option to true
to enable CSRF protection in the logout process
using Symfony's default CSRF token manager. Set also the csrf_token_manager
option if you need to use a custom CSRF token manager.
type: string
default: _csrf_token
The name of the parameter that stores the CSRF token value.
type: string
default: null
The id
of the service used to generate the CSRF tokens. Symfony provides a
default service whose ID is security.csrf.token_manager
.
type: string
default: logout
An arbitrary string used to identify the token (and check its validity afterwards).
type: string
default: /login_check
This is the URL or route name the system must post to authenticate using the JSON authenticator. The path must be covered by the firewall to which the user will authenticate.
type: string
default: username
Use this and password_path
to modify the expected request body
structure of the JSON authenticator. For instance, if the JSON document has
the following structure:
{
"security": {
"credentials": {
"login": "dunglas",
"password": "MyPassword"
}
}
}
The security configuration should be:
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: main: lazy: true json_login: check_path: login username_path: security.credentials.login password_path: security.credentials.password .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:srv="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <firewall name="main" lazy="true"> <json-login check-path="login" username-path="security.credentials.login" password-path="security.credentials.password"/> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { $mainFirewall = $security->firewall('main'); $mainFirewall->lazy(true); $mainFirewall->jsonLogin() ->checkPath('/login') ->usernamePath('security.credentials.login') ->passwordPath('security.credentials.password') ; };
type: string
default: password
Use this option to modify the expected request body structure. See username_path for more details.
There are several options for connecting against an LDAP server,
using the form_login_ldap
, http_basic_ldap
and json_login_ldap
authentication
providers or the ldap
user provider.
For even more details, see :doc:`/security/ldap`.
Authentication
You can authenticate to an LDAP server using the LDAP variants of the
form_login
, http_basic
and json_login
authentication providers. Use
form_login_ldap
, http_basic_ldap
and json_login_ldap
, which will
attempt to bind
against an LDAP server instead of using password comparison.
Both authentication providers have the same arguments as their normal counterparts, with the addition of two configuration keys:
type: string
default: ldap
This is the name of your configured LDAP client.
type: string
default: {user_identifier}
This is the string which will be used as the bind DN. The {user_identifier}
placeholder will be replaced with the user-provided value (their login).
Depending on your LDAP server's configuration, you may need to override
this value.
type: string
default: null
This is the string which will be used to query for the DN. The {user_identifier}
placeholder will be replaced with the user-provided value (their login).
Depending on your LDAP server's configuration, you will need to override
this value. This setting is only necessary if the user's DN cannot be derived
statically using the dn_string
config option.
User provider
Users will still be fetched from the configured user provider. If you wish to
fetch your users from an LDAP server, you will need to use the
:doc:`LDAP User Provider </security/ldap>` and any of these authentication
providers: form_login_ldap
or http_basic_ldap
or json_login_ldap
.
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: main: # ... x509: provider: your_user_provider user: SSL_CLIENT_S_DN_Email credentials: SSL_CLIENT_S_DN user_identifier: emailAddress .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <!-- ... --> <firewall name="main"> <!-- ... --> <x509 provider="your_user_provider" user="SSL_CLIENT_S_DN_Email" credentials="SSL_CLIENT_S_DN" user_identifier="emailAddress" /> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { $mainFirewall = $security->firewall('main'); $mainFirewall->x509() ->provider('your_user_provider') ->user('SSL_CLIENT_S_DN_Email') ->credentials('SSL_CLIENT_S_DN') ->userIdentifier('emailAddress') ; };
type: string
default: SSL_CLIENT_S_DN_Email
The name of the $_SERVER
parameter containing the user identifier used
to load the user in Symfony. The default value is exposed by Apache.
type: string
default: SSL_CLIENT_S_DN
If the user
parameter is not available, the name of the $_SERVER
parameter containing the full "distinguished name" of the certificate
(exposed by e.g. Nginx).
By default, Symfony identifies the value following emailAddress=
in this
parameter. This can be changed using the user_identifier
option.
type: string
default: emailAddress
The value of this option tells Symfony which parameter to use to find the user identifier in the "distinguished name".
For example, if the "distinguished name" is
Subject: C=FR, O=My Organization, CN=user1, [email protected]
,
and the value of this option is 'CN'
, the user identifier will be 'user1'
.
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: firewalls: main: # ... remote_user: provider: your_user_provider user: REMOTE_USER .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <firewall name="main"> <remote-user provider="your_user_provider" user="REMOTE_USER"/> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { $mainFirewall = $security->firewall('main'); $mainFirewall->remoteUser() ->provider('your_user_provider') ->user('REMOTE_USER') ; };
type: string
The service ID of the user provider that should be used by this authenticator.
type: string
default: REMOTE_USER
The name of the $_SERVER
parameter holding the user identifier.
If your application uses multiple :ref:`firewalls <firewalls-authentication>`, you'll notice that if you're authenticated in one firewall, you're not automatically authenticated in another. In other words, the systems don't share a common "context": each firewall acts like a separate security system.
However, each firewall has an optional context
key (which defaults to
the name of the firewall), which is used when storing and retrieving security
data to and from the session. If this key were set to the same value across
multiple firewalls, the "context" could actually be shared:
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: somename: # ... context: my_context othername: # ... context: my_context .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:srv="http://symfony.com/schema/dic/services" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <firewall name="somename" context="my_context"> <!-- ... --> </firewall> <firewall name="othername" context="my_context"> <!-- ... --> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { $security->firewall('somename') // ... ->context('my_context') ; $security->firewall('othername') // ... ->context('my_context') ; };
Note
The firewall context key is stored in session, so every firewall using it
must set its stateless
option to false
. Otherwise, the context is
ignored and you won't be able to authenticate on multiple firewalls at the
same time.
Firewalls can configure a stateless
boolean option in order to declare that
the session must not be used when authenticating users:
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: main: # ... stateless: true .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:srv="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <firewall name="main" stateless="true"> <!-- ... --> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { $mainFirewall = $security->firewall('main'); $mainFirewall->stateless(true); // ... };
Routes under this firewall will be :ref:`configured stateless <stateless-routing>` when they are not explicitly configured stateless or not.
During the authentication of a user, additional checks might be required to
verify if the identified user is allowed to log in. Each firewall can include
a user_checker
option to define the service used to perform those checks.
Learn more about user checkers in :doc:`/security/user_checkers`.
Firewalls can configure a list of required badges that must be present on the authenticated passport:
.. configuration-block:: .. code-block:: yaml # config/packages/security.yaml security: # ... firewalls: main: # ... required_badges: ['CsrfTokenBadge', 'My\Badge'] .. code-block:: xml <!-- config/packages/security.xml --> <?xml version="1.0" encoding="UTF-8" ?> <srv:container xmlns="http://symfony.com/schema/dic/security" xmlns:srv="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/security https://symfony.com/schema/dic/security/security-1.0.xsd"> <config> <firewall name="main"> <!-- ... --> <required_badge>CsrfTokenBadge</required_badge> <required_badge>My\Badge</required_badge> </firewall> </config> </srv:container> .. code-block:: php // config/packages/security.php use Symfony\Config\SecurityConfig; return static function (SecurityConfig $security): void { $mainFirewall = $security->firewall('main'); $mainFirewall->requiredBadges(['CsrfTokenBadge', 'My\Badge']); // ... };
This option defines how the application users are loaded (from a database, an LDAP server, a configuration file, etc.) Read :doc:`/security/user_providers` to learn more about each of those providers.
Instead of associating many roles to users, this option allows you to define role inheritance rules by creating a role hierarchy, as explained in :ref:`security-role-hierarchy`.