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phorge-phorge/scripts/__init_script__.php
epriestley 39b4d20ce5 Create AphrontWriteGuard, a backup mechanism for CSRF validation
Summary:
Provide a catchall mechanism to find unprotected writes.

  - Depends on D758.
  - Similar to WriteOnHTTPGet stuff from Facebook's stack.
  - Since we have a small number of storage mechanisms and highly structured
read/write pathways, we can explicitly answer the question "is this page
performing a write?".
  - Never allow writes without CSRF checks.
  - This will probably break some things. That's fine: they're CSRF
vulnerabilities or weird edge cases that we can fix. But don't push to Facebook
for a few days unless you're prepared to deal with this.
  - **>>> MEGADERP: All Conduit write APIs are currently vulnerable to CSRF!
<<<**

Test Plan:
  - Ran some scripts that perform writes (scripts/search indexers), no issues.
  - Performed normal CSRF submits.
  - Added writes to an un-CSRF'd page, got an exception.
  - Executed conduit methods.
  - Did login/logout (this works because the logged-out user validates the
logged-out csrf "token").
  - Did OAuth login.
  - Did OAuth registration.

Reviewers: pedram, andrewjcg, erling, jungejason, tuomaspelkonen, aran,
codeblock
Commenters: pedram
CC: aran, epriestley, pedram
Differential Revision: 777
2011-08-16 13:29:57 -07:00

35 lines
1.2 KiB
PHP

<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
error_reporting(E_ALL | E_STRICT);
ini_set('display_errors', 1);
$include_path = ini_get('include_path');
ini_set('include_path', $include_path.':'.dirname(__FILE__).'/../../');
@include_once 'libphutil/src/__phutil_library_init__.php';
if (!@constant('__LIBPHUTIL__')) {
echo "ERROR: Unable to load libphutil. Update your PHP 'include_path' to ".
"include the parent directory of libphutil/.\n";
exit(1);
}
phutil_load_library(dirname(__FILE__).'/../src/');
// NOTE: This is dangerous in general, but we know we're in a script context and
// are not vulnerable to CSRF.
AphrontWriteGuard::allowDangerousUnguardedWrites(true);