From:
Operating system: Windows
PHP version: 5.3.2
Package: hash related
Bug Type: Bug
Bug description:hash_copy() does not copy the HMAC key, causes wrong results
and PHP crashes
Description:
------------
in ./ext/hash/hash.c, line 559
The hash_copy() function does not copy the hash->key field. It only copies
the pointer. Because of hash_final() clears the key, the result of
hash_final of copied hashing resource gives wrong results. It causes random
PHP crashes too, because the pointer to the HMAC key can be invalid
(released within the other hashing context).
Test script:
---------------
$h = hash_init('crc32b', HASH_HMAC, '123456' );
$h2 = hash_copy($h);
var_dump(hash_final($h));
var_dump(hash_final($h2));
echo '<-- These two results should be the same.';
Expected result:
----------------
string(8) "278af264" string(8) "278af264" <-- These two results should be
the same.
Actual result:
--------------
string(8) "278af264" string(8) "07997b35" <-- These two results should be
the same.
--
Edit bug report at http://bugs.php.net/bug.php?id=52240&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52240&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52240&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52240&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52240&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52240&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52240&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52240&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52240&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52240&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52240&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52240&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52240&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52240&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52240&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52240&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52240&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52240&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52240&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52240&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52240&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52240&r=mysqlcfg
