From:             niall dot ocallaghan at gmail dot com
Operating system: Windows Vista Ultimate SP1
PHP version:      5.2CVS-2009-02-19 (snap)
PHP Bug Type:     mcrypt related
Bug description:  Inconsistent results

Description:
------------
When attempting to encrypt a JSON encoded string using a secret key, I get
inconsistent results depending on the data and the key I used. I have
managed to recreate this and believe it is an issue with the mcrypt module.
 

The JSON string is 303 characters in length, and simply by changing on
character from a 6 to a 7, it fixes the problem. I have included a URL for
reproducing this error

Reproduce code:
---------------
http://78.137.160.50/fcl/bug.txt

Please note in the above code I have given two example strings. The first
does not work (and is a reproduction of this bug), the second does. They
are identical strings except for the character at position 297. I changed
the 6 to a 7 and it fixes the problem

Expected result:
----------------
I expect to see a decrypted value of the string.

Actual result:
--------------
I see 99% of the string has been decrypted however the last few characters
are corrupt.

-- 
Edit bug report at http://bugs.php.net/?id=47445&edit=1
-- 
Try a CVS snapshot (PHP 5.2):        
http://bugs.php.net/fix.php?id=47445&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):        
http://bugs.php.net/fix.php?id=47445&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):        
http://bugs.php.net/fix.php?id=47445&r=trysnapshot60
Fixed in CVS:                        
http://bugs.php.net/fix.php?id=47445&r=fixedcvs
Fixed in CVS and need be documented: 
http://bugs.php.net/fix.php?id=47445&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=47445&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=47445&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=47445&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=47445&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=47445&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=47445&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=47445&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=47445&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=47445&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=47445&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=47445&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=47445&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=47445&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=47445&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=47445&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=47445&r=mysqlcfg

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