Symfony user authentication using Active Directory

Answer 1

You could give the bhLDAPAuthPlugin a try?

Answer 2

You can do that by writing your own authentication callable for sfDoctrineGuardPlugin (if you're using Doctrine). I'll quote plugins' README here:

Check the user password with an external method

If you don't want to store the password in the database because you already have a LDAP server, a .htaccess file or if you store your passwords in another table, you can provide your own checkPassword callable (static method or function) in app.yml:

all:
  sf_guard_plugin:
    check_password_callable: [MyLDAPClass, checkPassword]

When symfony will call the $this->getUser()->checkPassword() method, it will call your method or function. Your function must takes 2 parameters, the first one is the username and the second one is the password. It must returns true or false. Here is a template for such a function:

function checkLDAPPassword($username, $password)
{
  $user = LDAP::getUser($username);
  if ($user->checkPassword($password))
  {
    return true;
  }
  else
  {
    return false;
  }
}

Answer 3

http://www.symfony-project.org/plugins/vjGuardADPlugin