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phorge-phorge/src/infrastructure/util/hash/PhabricatorHash.php
epriestley e45ffda55a Move most remaining sha1() calls to HMAC
Summary:
  - For context, see T547. This is the last (maybe?) in a series of diffs that
moves us off raw sha1() calls in order to make it easier to audit the codebase
for correct use of hash functions.
  - This breaks CSRF tokens. Any open forms will generate an error when
submitted, so maybe upgrade off-peak.
  - We now generate HMAC mail keys but accept MAC or HMAC. In a few months, we
can remove the MAC version.
  - The only remaining callsite is Conduit. We can't use HMAC since Arcanist
would need to know the key. {T550} provides a better solution to this, anyway.

Test Plan:
  - Verified CSRF tokens generate properly.
  - Manually changed CSRF to an incorrect value and got an error.
  - Verified mail generates with a new mail hash.
  - Verified Phabricator accepts both old and new mail hashes.
  - Verified Phabricator rejects bad mail hashes.
  - Checked user log, things look OK.

Reviewers: btrahan, jungejason, benmathews

Reviewed By: btrahan

CC: aran, epriestley, btrahan

Maniphest Tasks: T547

Differential Revision: 1237
2011-12-19 08:56:53 -08:00

31 lines
916 B
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.
*/
final class PhabricatorHash {
public static function digest($string) {
$key = PhabricatorEnv::getEnvConfig('security.hmac-key');
if (!$key) {
throw new Exception(
"Set a 'security.hmac-key' in your Phabricator configuration!");
}
return hash_hmac('sha1', $string, $key);
}
}