Bug #64162 [NEW]: Extra characters added to base64_decode() output
From: rob at neovidamedia dot com
Operating system: Windows 7
PHP version: Irrelevant
Package: *Encryption and hash functions
Bug Type: Bug
Bug description:Extra characters added to base64_decode() output
Description:
------------
---
From manual page: http://www.php.net/function.base64-decode
---
Run this code, and notice the output for 'Decoded' -- it looks the same as
'Original', but it is not. Select it (the result), copy it, and paste it
into
notepad or something, and you will see a bonus character at the end.
It seems to be related to the string length of $a, and the fact that it
contains
a
number at its end, but I could be wrong. I ran about one hundred different
scenario tests, and got some funky results.
PS - I am running PHP 5.2.17, but that is what my host offers. Don't think
I
can upgrade on my own ...
Test script:
---------------
$a = "Proteussing88";
function randLetter()
{
$int = rand(0,61);
$a_z =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
$rand_letter = $a_z[$int];
return $rand_letter;
}
$pass = randLetter() . base64_encode($a) . randLetter() . randLetter() .
randLetter();
$db_pass = base64_decode(substr($pass, 1, (strlen($pass) - 2)));
$final = substr($db_pass, 0, (strlen($db_pass) - 1));
echo 'Original: ' . $a . '<br />Encoded: ' . $pass . '<br
/>Decoded: ' .
$final;
Expected result:
----------------
The visual result is fine, but in the background a special character is
being
added to the final string variable.
Actual result:
--------------
The final string variable looks right, but only in a browser. Paste it
into
notepad or any other text editor, and you get an unexpected special
character at
its end.
--
Edit bug report at https://bugs.php.net/bug.php?id=64162&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=64162&r=trysnapshot54
Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=64162&r=trysnapshot53
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=64162&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64162&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64162&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64162&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64162&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64162&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64162&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64162&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=64162&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=64162&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64162&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64162&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64162&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64162&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64162&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64162&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64162&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64162&r=mysqlcfg
Thread (6 messages)
- rob at neovidamedia dot com