#44133 [Opn->Bgs]: Encrypting then decrypting a string results in unidentical strings.

ID: 44133 Updated by: derick@php.net Reported By: squinky86 at gmail dot com -Status: Open +Status: Bogus Bug Type: mcrypt related Operating System: Linux and Windows PHP Version: 5.2.5 New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php That's because the IV needs to be the same for encrypting as well as decrypting. Previous Comments: ------------------------------------------------------------------------ [2008-02-15 22:20:56] squinky86 at gmail dot com Description: ------------ When I mcrypt_encrypt() a string, then immediately mcrypt_decrypt() the string, the result is two strings that appear identical but are not. Reproduce code: --------------- Due to having multiple test cases for this bug, I have posted the code to: http://www.phpfreaks.com/forums/index.php/topic,182537.msg815864.html Note also that since the posting of this issue, I have noted the following: strlen($toEncrypt) == strlen($decrypted) == 13 ord($toEncrypt[$i]) == ord($decrypted[$i]) for all $i = 0..12 For all intensive purposes, the strings are identical, but PHP does not define them as such. Expected result: ---------------- The strings should be identical after encryption and decryption Actual result: -------------- The strcmp() function returns "-3". The == operator returns "false". ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=44133&edit=1