frame-ancestors doesn't fall back to default-src. So when we apply a
very restricted CSP we should make sure to set it to 'none' and not
leave it empty.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Signed-off-by: Joas Schilling <coding@schilljs.com>

To continue this formatting madness, here's a tiny patch that adds
unified formatting for control structures like if and loops as well as
classes, their methods and anonymous functions. This basically forces
the constructs to start on the same line. This is not exactly what PSR2
wants, but I think we can have a few exceptions with "our" style. The
starting of braces on the same line is pracrically standard for our
code.

This also removes and empty lines from method/function bodies at the
beginning and end.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

For PSR2

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

* Order the imports
* No leading slash on imports
* Empty line before namespace
* One line per import
* Empty after imports
* Emmpty line at bottom of file

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

This adds the events and the classes to modify the feature policy.
It also adds a default restricted feature policy.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

For #14179

By default responses should have the strictest (and simplest) CSP
possible. Only template responses should require an actual CSP.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

For #13042

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

* Move a-b to PSR-4

* Move c-d to PSR-4

* Move e+g to PSR-4

* Move h-l to PSR-4

* Move m-r to PSR-4

* Move s-u to PSR-4

* Move files/ to PSR-4

* Move remaining tests to PSR-4

* Remove Test\ from old autoloader

Fixes https://github.com/owncloud/core/issues/19438

This change allows AppFramework applications to specify a custom CSP header for example when the default policy is too strict. Furthermore this allows us to partially migrate away from CSS and allowed eval() in our JavaScript components.

Legacy ownCloud components will still use the previous policy. Application developers can use this as following in their controllers:
```php
$response = new TemplateResponse('activity', 'list', []);
$cspHelper = new ContentSecurityPolicyHelper();
$cspHelper->addAllowedScriptDomain('www.owncloud.org');
$response->addHeader('Content-Security-Policy', $cspHelper->getPolicy());
return $response;
```

Fixes https://github.com/owncloud/core/issues/11857 which is a pre-requisite for https://github.com/owncloud/core/issues/13458 and https://github.com/owncloud/core/issues/11925

fix docstrings

adjust copyright date

another copyright date update

another header update

implement third headers argument, fix indention, fix docstrings

fix docstrings