#47467 [Com]: The crc32b polynomial result has a wrong endianess
| From: | php at twinmail dot de | Date: | Fri, 27 Feb 2009 20:35:51 +0000 |
| Subject: | #47467 [Com]: The crc32b polynomial result has a wrong endianess | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-134262@lists.php.net to get a copy of this message | ||
ID: 47467
Comment by: php at twinmail dot de
Reported By: php at twinmail dot de
Status: Feedback
Bug Type: hash related
Operating System: *
PHP Version: 5.2.8
Assigned To: pajoye
New Comment:
You are right: I tested this issue against PHP versions on linux which
were below 5.2.8 and therefore affected by #45028. Before posting a new
bug I also checked against some online calculators of crc32b, but they
were also affected by #45028. So I thought "5dd48a35" is the correct
result, but it isn't! "358ad45d" is indeed the correct result, so PHP
5.2.8 is correctly calculating crc32b.
This means everything is fine, except that I am an idiot! ;-) Sorry for
reporting this "bug".
Previous Comments:
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[2009-02-27 14:33:35] pajoye@php.net
Are you sure you are using the same PHP version on all systems (try
5.2.8 on linux)?
I can't reproduce the problem on any of my tests hosts. The only
difference is with php version prior to 5.2.6, but that's due to the bug
#45028 which is now fixed.
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[2009-02-20 22:21:03] pajoye@php.net
Windows has no specific endianess but the processor. However I can
reproduce on windows (vc6 and vc9). Weird, needs more analyze.
------------------------------------------------------------------------
[2009-02-20 21:24:26] php at twinmail dot de
Description:
------------
The polynomial result of the crc32b hash function has since 5.2.8 a
wrong byte endianess on Windows. This also affects the CVS snapshot. I
cannot reproduce this error on any linux (debian / debian / gentoo /
opensuse) box I have, so I think this bug only affects Windows
versions.
I tested different versions of PHP on my Windows system:
PHP 5.2.9RC4-dev (cli) (built: Feb 20 2009 15:57:39): affected
PHP 5.2.8 (cli) (built: Dec 8 2008 19:31:23): affected
PHP 5.2.6 (cli) (built: May 2 2008 18:02:07): NOT affected
The bug #45028 is maybe related to this one.
Reproduce code:
---------------
print hash('crc32b', 'Lorem Ipsum');
Expected result:
----------------
5dd48a35
Actual result:
--------------
358ad45d
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Edit this bug report at http://bugs.php.net/?id=47467&edit=1