note 113528 added to function.hash-pbkdf2
| From: | does dot not at matter dot org | Date: | Fri, 25 Oct 2013 15:30:48 +0000 |
| Subject: | note 113528 added to function.hash-pbkdf2 | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-197321@lists.php.net to get a copy of this message | ||
this snippet was posted over a year ago on a dutch PHP community: (reference/source: http://www.phphulp.nl/php/script/beveiliging/pbkdf2-een-veilige-manier-om-wachtwoorden-op-te-slaan/1956/pbkdf2php/1757/)
<?php
/**
* @author Chris Horeweg
* @package Security_Tools
*/
function pbkdf2($password, $salt, $algorithm = 'sha512', $count = 20000, $key_length =
128, $raw_output = false)
{
if(!in_array($algorithm, hash_algos(), true)) {
exit('pbkdf2: Hash algoritme is niet geinstalleerd op het systeem.');
}
if($count <= 0 || $key_length <= 0) {
$count = 20000;
$key_length = 128;
}
$hash_length = strlen(hash($algorithm, "", true));
$block_count = ceil($key_length / $hash_length);
$output = "";
for($i = 1; $i <= $block_count; $i++) {
$last = $salt . pack("N", $i);
$last = $xorsum = hash_hmac($algorithm, $last, $password, true);
for ($j = 1; $j < $count; $j++) {
$xorsum ^= ($last = hash_hmac($algorithm, $last, $password, true));
}
$output .= $xorsum;
}
if($raw_output) {
return substr($output, 0, $key_length);
}
else {
return base64_encode(substr($output, 0, $key_length));
}
}
----
Server IP: 64.71.164.2
Probable Submitter: 87.211.29.232
----
Manual Page -- http://php.net/manual/en/function.hash-pbkdf2.php
Edit -- https://master.php.net/note/edit/113528
Del: integrated -- https://master.php.net/note/delete/113528/integrated
Del: useless -- https://master.php.net/note/delete/113528/useless
Del: bad code -- https://master.php.net/note/delete/113528/bad+code
Del: spam -- https://master.php.net/note/delete/113528/spam
Del: non-english -- https://master.php.net/note/delete/113528/non-english
Del: in docs -- https://master.php.net/note/delete/113528/in+docs
Del: other reasons-- https://master.php.net/note/delete/113528
Reject -- https://master.php.net/note/reject/113528
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