Bug #70312 [NEW]: HAVAL gives wrong hashes in specific cases
| From: | letsgolee at naver dot com | Date: | Thu, 20 Aug 2015 15:00:40 +0000 |
| Subject: | Bug #70312 [NEW]: HAVAL gives wrong hashes in specific cases | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-195373@lists.php.net to get a copy of this message | ||
From: letsgolee at naver dot com
Operating system: Windows/linux
PHP version: 5.4.44
Package: hash related
Bug Type: Bug
Bug description:HAVAL gives wrong hashes in specific cases
Description:
------------
HAVAL pads a string with a wrong pad length, if the remaining string is
over 64 and under 118 bytes length. The suspect code is:
index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
when the remaining string is under 63 bytes long then there seems no
problem, but when a string is over 64 and under 118 then it seems to
have a wrong padding length.
If you test
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMOPQRSTUVWXYZ0123456789"
then, it will give you right hash value, because the string length is
183 and it is above 128 and the remaining string length is 55. And 55 is
under 64 so it will give a right result.
Test script:
---------------
hash('haval256,5',
'1234567890123456789012345678901234567890123456789012345678901234');
Expected result:
----------------
fb73c19300b14d5cb393d929bf005e6c2d459a4c9c009e9813af1d2d3637ee8f
Actual result:
--------------
498f3710ed9373908405d608e15df8157ef777abe85794b67f590347b4506fb2
--
Edit bug report at https://bugs.php.net/bug.php?id=70312&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70312&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70312&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70312&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=70312&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=70312&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=70312&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=70312&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=70312&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=70312&r=support
Expected behavior: https://bugs.php.net/fix.php?id=70312&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=70312&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=70312&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=70312&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70312&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=70312&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=70312&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=70312&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=70312&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=70312&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=70312&r=mysqlcfg