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- added sha1-96 and md5-96

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git-svn-id: http://phpseclib.svn.sourceforge.net/svnroot/phpseclib/trunk@9 21d32557-59b3-4da0-833f-c5933fad653e
This commit is contained in:
Jim Wigginton 2007-09-23 04:41:39 +00:00
parent 79944da3ed
commit 890ae4db4a
1 changed files with 41 additions and 17 deletions
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58
phpseclib/Crypt/HMAC.php
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@ -28,7 +28,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: HMAC.php,v 1.2 2007-07-25 21:56:14 terrafrost Exp $
* @version $Id: HMAC.php,v 1.3 2007-09-23 04:41:39 terrafrost Exp $
* @link http://phpseclib.sourceforge.net
*/
@ -117,6 +117,15 @@ class Crypt_HMAC {
*/
var $ipad;
/**
* Final HMAC Length
*
* @see Crypt_HMAC::hmac()
* @var String
* @access private
*/
var $length = 0;
/**
* Default Constructor.
*
@ -162,13 +171,21 @@ class Crypt_HMAC {
*/
function setHash($hash)
{
switch ($hash) {
case 'md5-96':
case 'sha1-96':
$this->length = 12;
}
switch (CRYPT_HMAC_MODE) {
case CRYPT_HMAC_MODE_MHASH:
switch ($hash) {
case 'md5':
case 'md5-96':
$this->hash = MHASH_MD5;
break;
case 'sha1':
case 'sha1-96':
default:
$this->hash = MHASH_SHA1;
}
@ -176,21 +193,26 @@ class Crypt_HMAC {
case CRYPT_HMAC_MODE_HASH:
switch ($hash) {
case 'md5':
case 'sha1':
$this->hash = $hash;
case 'md5-96':
$this->hash = 'md5';
return;
case 'sha1':
case 'sha1-96':
default:
$this->hash = 'sha1';
}
return;
}
switch ($hash) {
case 'md5':
case 'md5-96':
$this->b = 64;
$this->l = 16;
$this->hash = 'md5';
break;
case 'sha1':
case 'sha1-96':
default:
$this->b = 64;
$this->l = 20;
@ -211,22 +233,24 @@ class Crypt_HMAC {
{
switch (CRYPT_HMAC_MODE) {
case CRYPT_HMAC_MODE_MHASH:
return mhash($this->hash, $text, $this->key);
$hmac = mhash($this->hash, $text, $this->key);
break;
case CRYPT_HMAC_MODE_HASH:
return hash_hmac($this->hash, $text, $this->key, true);
$hmac = hash_hmac($this->hash, $text, $this->key, true);
break;
case CRYPT_HMAC_MODE_INTERNAL:
$hash = $this->hash;
$key = strlen($this->key) > $this->b ? $this->hash($this->key) : $this->key;
$key = str_pad($key, $this->b, chr(0)); // step 1
$temp = $this->ipad ^ $key; // step 2
$temp.= $text; // step 3
$temp = pack('H*', $hash($temp)); // step 4
$hmac = $this->opad ^ $key; // step 5
$hmac.= $temp; // step 6
$hmac = pack('H*', $hash($hmac)); // step 7
}
$hash = $this->hash;
$key = strlen($this->key) > $this->b ? $this->hash($this->key) : $this->key;
$key = str_pad($key, $this->b, chr(0)); // step 1
$temp = $this->ipad ^ $key; // step 2
$temp.= $text; // step 3
$temp = pack('H*', $hash($temp)); // step 4
$hmac = $this->opad ^ $key; // step 5
$hmac.= $temp; // step 6
$hmac = pack('H*', $hash($hmac)); // step 7
return $hmac;
return $this->length ? substr($hmac, 0, $this->length) : $hmac;
}
}