From:             hanno at hboeck dot de
Operating system: Linux
PHP version:      5.3.1
PHP Bug Type:     *Encryption and hash functions
Bug description:  crypt ignores sha512 prefix

Description:
------------
PHP has the crypt()-function which can create salted-hashes (e.g. usable
for shadow-passwords). Although it's not documented, in PHP 5.2 it was
possible to pass the prefix for sha512 like in the corresponding
glibc-function.

Example:
echo crypt('foo','$6$$bar$');
gives
$6$$QMXjqd7rHQZPQ1yHsXkQqC1FBzDiVfTHXL.LaeDAeVV.IzMaV9VU4MQ8kPuZa2SOP1A0RPm772EaFYjpEJtdu.

Now the same code in PHP 5.3.1 gives
$6A86JNndVTdM
(which is basically just crypt ignoring the $6-prefix for the salt)

I assume may have something to do with (cited from crypt-documentation):
"Note: As of PHP 5.3.0, PHP contains its own implementation and will use
that if the system lacks of support for one or more of the algorithms. "

Reproduce code:
---------------
echo crypt('foo','$6$$bar$');

Expected result:
----------------
$6$$QMXjqd7rHQZPQ1yHsXkQqC1FBzDiVfTHXL.LaeDAeVV.IzMaV9VU4MQ8kPuZa2SOP1A0RPm772EaFYjpEJtdu.

Actual result:
--------------
$6A86JNndVTdM

-- 
Edit bug report at http://bugs.php.net/?id=50334&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=50334&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=50334&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=50334&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=50334&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=50334&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=50334&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=50334&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=50334&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=50334&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=50334&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=50334&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=50334&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=50334&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=50334&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=50334&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=50334&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=50334&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=50334&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=50334&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=50334&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=50334&r=mysqlcfg

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