Edit report at https://bugs.php.net/bug.php?id=64211&edit=1
ID: 64211
User updated by: pwormer at science dot ru dot nl
Reported by: pwormer at science dot ru dot nl
Summary: sha256 hashes "#", "&", and "+" incorrectly.
Status: Not a bug
Type: Bug
Package: hash related
Operating System: windows/linux
PHP Version: 5.4.11
Block user comment: N
Private report: N
New Comment:
I call PHP from JS through XMLHttp.open("GET", "SHA256.php?pswd="+pswd). Maybe
the problem lies in XMLHttp?
Previous Comments:
------------------------------------------------------------------------
[2013-02-15 10:29:20] pwormer at science dot ru dot nl
Two more examples:
1. Password "a b" (no quotes, pswd contains three characters, middle one ASCII
32):
JS-hashed password :
c8687a08aa5d6ed2044328fa6a697ab8e96dc34291e8c2034ae8c38e6fcc6d65
PHP-hashed password:
c8687a08aa5d6ed2044328fa6a697ab8e96dc34291e8c2034ae8c38e6fcc6d65
2. Password "a#b" (no quotes, pswd contains three characters, middle one ASCII
35):
JS-hashed password :
8187fc8f7f007036dffc199544b33167632c7739733785bbdec0fbb9a2c43ca1
PHP-hashed password:
ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb
My problem is the difference in hash between JavaScript and PHP that occurs if
and only if the pswd contains anywhere #, & or +. By looking at PHP alone this
problem cannot be solved.
------------------------------------------------------------------------
[2013-02-14 21:38:29] [email protected]
s/expecting/getting
------------------------------------------------------------------------
[2013-02-14 21:37:50] [email protected]
Can't reproduce on 32 or 64 bit Linux:
$ php53 -r 'echo hash("sha256", "#") . "\n";'
334359b90efed75da5f0ada1d5e6b256f4a6bd0aee7eb39c0f90182a021ffc8b
$ php54 -r 'echo hash("sha256", "#") . "\n";'
334359b90efed75da5f0ada1d5e6b256f4a6bd0aee7eb39c0f90182a021ffc8b
Is it coincidence that "" (an empty string) gives the hash you are expecting
for
"#".
$ php53 -r 'echo hash("sha256", "") . "\n";'
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
$ php54 -r 'echo hash("sha256", "") . "\n";'
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
------------------------------------------------------------------------
[2013-02-14 11:05:56] pwormer at science dot ru dot nl
Description:
------------
The JavaScript functions at:
http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/sha256.js
and
http://www.movable-type.co.uk/scripts/sha256.html
give the same hash for any password of any length consisting of ASCII 32
through 128. Almost always the hash is the same as obtained from PHP:
hash("sha256", $pswd).
Exceptions (bugs?) are passwords containing one or more of the three characters:
"#" (number sign), "&" (ampersand), or "+" (plus sign).
Tested with XAMPP (PHP 5.4.7), FireFox and Chrome and Linux server.
Test script:
---------------
See http://www.theochem.ru.nl/~pwormer/sha256bug.php
This URL calls SHA256.php which contains the following four lines
<?php
$pswd = $_GET["pswd"];
echo hash("sha256", $pswd);
?>
Expected result:
----------------
I expect JavaScript and PHP to give same Sha-256 hashes
Actual result:
--------------
Hash of # (single character):
JS: 334359b90efed75da5f0ada1d5e6b256f4a6bd0aee7eb39c0f90182a021ffc8b
PHP: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=64211&edit=1
