Edit report at https://bugs.php.net/bug.php?id=64745&edit=1
ID: 64745
Updated by: ircmax...@php.net
Reported by: ezzatron at gmail dot com
Summary: hash_pbkdf2() truncates data when using default
length and hex output
Status: Assigned
Type: Bug
Package: hash related
PHP Version: 5.5.0beta4
Assigned To: ircmaxell
Block user comment: N
Private report: N
New Comment:
Ahh, very interesting find. Will confirm, write a test case, and push a fix for
it
later today.
Thanks for the report!
Previous Comments:
------------------------------------------------------------------------
[2013-05-01 00:18:45] ezzatron at gmail dot com
Description:
------------
When passing 0 as the length to hash_pbkdf2(), the behaviour is inconsistent
between raw output and hex-encoded output. See the test script for a concrete
example.
There are also no tests for the use case where length is defaulted in the
current
test suite (http://bit.ly/YcgMMu).
I'm attempting to write a compatibility library for this function for PHP
versions
earlier that 5.5, so the test suite for
https://github.com/eloquent/pbkdf2-compat
and its build history in Travis CI may also be useful, as it documents the
current
behaviour more extensively.
Test script:
---------------
<?php
$hash = hash_pbkdf2('sha1', 'password', 'salt', 1, 0);
$rawHash = hash_pbkdf2('sha1', 'password', 'salt', 1, 0, true);
var_dump($hash);
var_dump(bin2hex($rawHash));
Expected result:
----------------
string(40) "0c60c80f961f0e71f3a9b524af6012062fe037a6"
string(40) "0c60c80f961f0e71f3a9b524af6012062fe037a6"
Actual result:
--------------
string(20) "0c60c80f961f0e71f3a9"
string(40) "0c60c80f961f0e71f3a9b524af6012062fe037a6"
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=64745&edit=1
