The Security Component
Edit this pageWarning: You are browsing the documentation for Symfony 3.2, which is no longer maintained.
Read the updated version of this page for Symfony 6.1 (the current stable version).
The Security Component
The Security component provides a complete security system for your web application. It ships with facilities for authenticating using HTTP basic or digest authentication, interactive form login or X.509 certificate login, but also allows you to implement your own authentication strategies. Furthermore, the component provides ways to authorize authenticated users based on their roles, and it contains an advanced ACL system.
Installation
You can install the component in 2 different ways:
- Install it via Composer (
symfony/securityon Packagist); - Use the official Git repository (https://github.com/symfony/security).
Then, require the vendor/autoload.php file to enable the autoloading mechanism
provided by Composer. Otherwise, your application won't be able to find the classes
of this Symfony component.
The Security component is divided into four smaller sub-components which can be used separately:
symfony/security-core- It provides all the common security features, from authentication to authorization and from encoding passwords to loading users.
symfony/security-http- It integrates the core sub-component with the HTTP protocol to handle HTTP requests and responses.
symfony/security-csrf- It provides protection against CSRF attacks.
symfony/security-acl- It provides a fine grained permissions mechanism based on Access Control Lists.
Learn More
- Authentication
- Authorization
- The Firewall and Authorization
- Securely Generating Random Values
- Security
- How Does the Security access_control Work?
- How to Create a Custom Access Denied Handler
- How to Use Access Control Lists (ACLs)
- How to Use advanced ACL Concepts
- How to Authenticate Users with API Keys
- Using CSRF Protection in the Login Form
- How to Create a custom Authentication Provider
- How to Create a Custom Form Password Authenticator
- How to Create a custom User Provider
- How to Load Security Users from the Database (the Entity Provider)
- How to Restrict Firewalls to a Specific Request
- How to Force HTTPS or HTTP for different URLs
- How to Customize Redirect After Form Login
- How to Build a Traditional Login Form
- How to Create a Custom Authentication System with Guard
- How to Restrict Firewalls to a Specific Host
- How to Impersonate a User
- Authenticating against an LDAP server
- How to Use Multiple Guard Authenticators
- How to Use multiple User Providers
- How to Choose the Password Encoder Algorithm Dynamically
- How to Manually Encode a Password
- Using pre Authenticated Security Firewalls
- How to Add "Remember Me" Login Functionality
- How to Secure any Service or Method in your Application
- How to Check for Known Security Vulnerabilities in Your Dependencies
- How to Change the default Target Path Behavior
- How to Create and Enable Custom User Checkers
- How to Use Voters to Check User Permissions
- SecurityBundle Configuration ("security")
- UserPassword
