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Commit cb6f846

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weaverryanweaverryan
committed
Merge branch '2.7'
* 2.7: [#4606] Getting my XML (and PHP) on in the new security chapter [#4606] Tweaks thanks entirely to stof Changing to _ for consistency [#4606] Updating thanks to comments from everyone! Completely re-reading the security book Misc changes [Cookbook] Fix XML example of RTE
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‎best_practices/controllers.rst

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@@ -110,8 +110,9 @@ for the homepage of our app:
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*/
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public function indexAction()
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{
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$em = $this->getDoctrine()->getManager();
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$posts = $em->getRepository('App:Post')->findLatest();
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$posts = $this->getDoctrine()
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->getRepository('AppBundle:Post')
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->findLatest();
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return $this->render('default/index.html.twig', array(
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'posts' => $posts
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.. code-block:: php
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use AppBundle\Entity\Post;
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use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
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/**
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$deleteForm = $this->createDeleteForm($post);
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return $this->render('admin/post/show.html.twig', array(
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'post' => $post,
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'post' => $post,
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'delete_form' => $deleteForm->createView(),
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));
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}
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.. code-block:: php
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use AppBundle\Entity\Post;
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use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
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use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
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use Symfony\Component\HttpFoundation\Request;
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/**
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* @Route("/comment/{postSlug}/new", name = "comment_new")

‎book/security.rst

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‎components/map.rst.inc

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* :doc:`/components/security/firewall`
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* :doc:`/components/security/authentication`
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* :doc:`/components/security/authorization`
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* :doc:`/components/security/secure_tools`
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* **Serializer**
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‎components/security/index.rst

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firewall
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authentication
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authorization
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secure_tools

‎components/security/secure_tools.rst

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Securely Comparing Strings and Generating Random Numbers
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========================================================
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The Symfony Security component comes with a collection of nice utilities
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related to security. These utilities are used by Symfony, but you should
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also use them if you want to solve the problem they address.
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Comparing Strings
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~~~~~~~~~~~~~~~~~
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The time it takes to compare two strings depends on their differences. This
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can be used by an attacker when the two strings represent a password for
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instance; it is known as a `Timing attack`_.
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Internally, when comparing two passwords, Symfony uses a constant-time
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algorithm; you can use the same strategy in your own code thanks to the
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:class:`Symfony\\Component\\Security\\Core\\Util\\StringUtils` class::
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use Symfony\Component\Security\Core\Util\StringUtils;
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// is some known string (e.g. password) equal to some user input?
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$bool = StringUtils::equals($knownString, $userInput);
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.. caution::
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To avoid timing attacks, the known string must be the first argument
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and the user-entered string the second.
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Generating a Secure random Number
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Whenever you need to generate a secure random number, you are highly
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encouraged to use the Symfony
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:class:`Symfony\\Component\\Security\\Core\\Util\\SecureRandom` class::
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use Symfony\Component\Security\Core\Util\SecureRandom;
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$generator = new SecureRandom();
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$random = $generator->nextBytes(10);
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The
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:method:`Symfony\\Component\\Security\\Core\\Util\\SecureRandom::nextBytes`
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method returns a random string composed of the number of characters passed as
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an argument (10 in the above example).
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The SecureRandom class works better when OpenSSL is installed. But when it's
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not available, it falls back to an internal algorithm, which needs a seed file
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to work correctly. Just pass a file name to enable it::
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use Symfony\Component\Security\Core\Util\SecureRandom;
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$generator = new SecureRandom('/some/path/to/store/the/seed.txt');
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$random = $generator->nextBytes(10);
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.. note::
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If you're using the Symfony Framework, you can access a secure random
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instance directly from the container: its name is ``security.secure_random``.
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.. _`Timing attack`: http://en.wikipedia.org/wiki/Timing_attack

‎cookbook/doctrine/resolve_target_entity.rst

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<doctrine:config>
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<doctrine:orm>
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<!-- ... -->
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<doctrine:resolve-target-entity interface="Acme\InvoiceBundle\Model\InvoiceSubjectInterface">Acme\AppBundle\Entity\Customer</resolve-target-entity>
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<doctrine:resolve-target-entity interface="Acme\InvoiceBundle\Model\InvoiceSubjectInterface">Acme\AppBundle\Entity\Customer</doctrine:resolve-target-entity>
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</doctrine:orm>
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</doctrine:config>
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</container>

‎cookbook/expression/expressions.rst

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* :ref:`Configuring services <book-services-expressions>`;
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* :ref:`Route matching conditions <book-routing-conditions>`;
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* :ref:`Checking security <book-security-expressions>` and
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* :ref:`Checking security <book-security-expressions>` (explained below) and
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:ref:`access controls with allow_if <book-security-allow-if>`;
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* :doc:`Validation </reference/constraints/Expression>`.
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For more information about how to create and work with expressions, see
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:doc:`/components/expression_language/syntax`.
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.. _book-security-expressions:
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Security: Complex Access Controls with Expressions
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--------------------------------------------------
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.. versionadded:: 2.4
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The expression functionality was introduced in Symfony 2.4.
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In addition to a role like ``ROLE_ADMIN``, the ``isGranted`` method also
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accepts an :class:`Symfony\\Component\\ExpressionLanguage\\Expression` object::
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use Symfony\Component\ExpressionLanguage\Expression;
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// ...
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public function indexAction()
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{
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if (!$this->get('security.context')->isGranted(new Expression(
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'"ROLE_ADMIN" in roles or (user and user.isSuperAdmin())'
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))) {
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throw $this->createAccessDeniedException();
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}
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// ...
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}
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In this example, if the current user has ``ROLE_ADMIN`` or if the current
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user object's ``isSuperAdmin()`` method returns ``true``, then access will
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be granted (note: your User object may not have an ``isSuperAdmin`` method,
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that method is invented for this example).
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This uses an expression and you can learn more about the expression language
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syntax, see :doc:`/components/expression_language/syntax`.
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.. _book-security-expression-variables:
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Inside the expression, you have access to a number of variables:
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``user``
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The user object (or the string ``anon`` if you're not authenticated).
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``roles``
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The array of roles the user has, including from the
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:ref:`role hierarchy <book-security-role-hierarchy>` but not including the
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``IS_AUTHENTICATED_*`` attributes (see the functions below).
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``object``
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The object (if any) that's passed as the second argument to ``isGranted``.
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``token``
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The token object.
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``trust_resolver``
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The :class:`Symfony\\Component\\Security\\Core\\Authentication\\AuthenticationTrustResolverInterface`,
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object: you'll probably use the ``is_*`` functions below instead.
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Additionally, you have access to a number of functions inside the expression:
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``is_authenticated``
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Returns ``true`` if the user is authenticated via "remember-me" or authenticated
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"fully" - i.e. returns true if the user is "logged in".
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``is_anonymous``
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Equal to using ``IS_AUTHENTICATED_ANONYMOUSLY`` with the ``isGranted`` function.
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``is_remember_me``
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Similar, but not equal to ``IS_AUTHENTICATED_REMEMBERED``, see below.
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``is_fully_authenticated``
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Similar, but not equal to ``IS_AUTHENTICATED_FULLY``, see below.
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``has_role``
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Checks to see if the user has the given role - equivalent to an expression like
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``'ROLE_ADMIN' in roles``.
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.. sidebar:: ``is_remember_me`` is different than checking ``IS_AUTHENTICATED_REMEMBERED``
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The ``is_remember_me`` and ``is_authenticated_fully`` functions are *similar*
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to using ``IS_AUTHENTICATED_REMEMBERED`` and ``IS_AUTHENTICATED_FULLY``
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with the ``isGranted`` function - but they are **not** the same. The
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following shows the difference::
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use Symfony\Component\ExpressionLanguage\Expression;
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// ...
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$sc = $this->get('security.context');
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$access1 = $sc->isGranted('IS_AUTHENTICATED_REMEMBERED');
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$access2 = $sc->isGranted(new Expression(
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'is_remember_me() or is_fully_authenticated()'
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));
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Here, ``$access1`` and ``$access2`` will be the same value. Unlike the
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behavior of ``IS_AUTHENTICATED_REMEMBERED`` and ``IS_AUTHENTICATED_FULLY``,
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the ``is_remember_me`` function *only* returns true if the user is authenticated
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via a remember-me cookie and ``is_fully_authenticated`` *only* returns
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true if the user has actually logged in during this session (i.e. is
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full-fledged).

‎cookbook/map.rst.inc

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* :doc:`/cookbook/security/index`
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* :doc:`/cookbook/security/form_login_setup`
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* :doc:`/cookbook/security/entity_provider`
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* :doc:`/cookbook/security/remember_me`
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* :doc:`/cookbook/security/impersonating_user`
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* :doc:`/cookbook/security/target_path`
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* :doc:`/cookbook/security/csrf_in_login_form`
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* :doc:`/cookbook/security/named_encoders`
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* :doc:`/cookbook/security/access_control`
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* :doc:`/cookbook/security/multiple_user_providers`
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* **Serializer**
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