2011-01-25 18:59:31 +01:00
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<?php
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/*
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* Copyright 2011 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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2011-05-28 01:39:34 +02:00
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error_reporting(E_ALL | E_STRICT);
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ini_set('display_errors', 1);
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2011-01-25 18:59:31 +01:00
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$include_path = ini_get('include_path');
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ini_set('include_path', $include_path.':'.dirname(__FILE__).'/../../');
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2011-04-30 22:48:21 +02:00
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@include_once 'libphutil/src/__phutil_library_init__.php';
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2011-01-25 18:59:31 +01:00
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if (!@constant('__LIBPHUTIL__')) {
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echo "ERROR: Unable to load libphutil. Update your PHP 'include_path' to ".
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"include the parent directory of libphutil/.\n";
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exit(1);
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}
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phutil_load_library(dirname(__FILE__).'/../src/');
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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
2011-08-03 20:49:27 +02:00
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// NOTE: This is dangerous in general, but we know we're in a script context and
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// are not vulnerable to CSRF.
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AphrontWriteGuard::allowDangerousUnguardedWrites(true);
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