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Caution about impersonation not compatible with pre authenticated #6673

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Jul 2, 2016
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Caution about impersonation not compatible with pre authenticated #6673

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f4249f3
improve caution about impersonation not compatible with pre authentic…
pasdeloup Jun 22, 2016
b5354e5
fix pre Authenticated -> pre-authenticated
pasdeloup Jun 22, 2016
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13 changes: 11 additions & 2 deletions cookbook/security/impersonating_user.rst
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Expand Up @@ -6,8 +6,17 @@ How to Impersonate a User

Sometimes, it's useful to be able to switch from one user to another without
having to log out and log in again (for instance when you are debugging or trying
to understand a bug a user sees that you can't reproduce). This can be easily
done by activating the ``switch_user`` firewall listener:
to understand a bug a user sees that you can't reproduce).

.. caution::

User impersonation is not compatible with
:doc:`pre Authenticated firewalls</cookbook/security/pre_authenticated>`. The
reason is that impersonation requires the authentication state to be maintained
server-side but pre-authenticated information (``SSL_CLIENT_S_DN_Email``,
``REMOTE_USER`` or other) is sent in each request.

This can be easily done by activating the ``switch_user`` firewall listener:

.. configuration-block::

Expand Down
14 changes: 8 additions & 6 deletions cookbook/security/pre_authenticated.rst
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Expand Up @@ -11,6 +11,14 @@ box, Symfony supports most authentication mechanisms.
These requests are called *pre authenticated* requests because the user is already
authenticated when reaching your application.

.. caution::

:doc:`User impersonation </cookbook/security/impersonating_user>` is not
compatible with pre-authenticated firewalls. The reason is that
impersonation requires the authentication state to be maintained server-side
but pre-authenticated information (``SSL_CLIENT_S_DN_Email``, ``REMOTE_USER``
or other) is sent in each request.

X.509 Client Certificate Authentication
---------------------------------------

Expand Down Expand Up @@ -152,9 +160,3 @@ key in the ``remote_user`` firewall configuration.
See :ref:`the previous note <cookbook-security-pre-authenticated-user-provider-note>`
for more information.

.. caution::

:doc:`User impersonation </cookbook/security/impersonating_user>` is not
compatible with ``REMOTE_USER`` based authentication. The reason is that
impersonation requires the authentication state to be maintained server-side
but ``REMOTE_USER`` information is sent by the browser in each request.