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<?php
/**
* The Horde_Cipher_BlockMode:: class provides a common abstracted
* interface to various block mode handlers for cyphers.
*
* $Horde: horde/lib/Cipher/BlockMode.php,v 1.4.2.4 2003/01/05 02:54:11 jon Exp $
*
* Copyright 2002-2003 Mike Cochrane <mike@graftonhall.co.nz>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Mike Cochrane <mike@graftonhall.co.nz>
* @version $Revision: 1.4.2.4 $
* @since Horde 2.2
* @package horde.cipher
*/
class Horde_Cipher_BlockMode {
/* String containing the initilization vector. */
var $_iv = "\0\0\0\0\0\0\0\0";
/**
* Attempts to return a concrete CipherBlockMode instance based on $mode.
*
* @access public
*
* @param mixed $cipher The type of concrete CipherBlockMode
* subclass to return.
* @param optional array $params A hash containing any additional
* parameters a subclass might need.
*
* @return object CipherBlockMode The newly created concrete Cipher
* instance, or PEAR_Error on an error.
*/
function &factory($mode, $params = null)
{
$mode = strtolower(basename($mode));
if (@file_exists(dirname(__FILE__) . '/Cipher/BlockMode/' . $mode . '.php')) {
require_once dirname(__FILE__) . '/Cipher/BlockMode/' . $mode . '.php';
} else {
require_once HORDE_BASE . '/lib/Cipher/BlockMode/' . $mode . '.php';
}
$class = 'Horde_Cipher_BlockMode_' . $mode;
if (class_exists($class)) {
return new $class($params);
} else {
return PEAR::raiseError('Class definition of ' . $class . ' not found.');
}
}
/**
* Set the iv
*
* @param String $iv The new iv.
*/
function setIV($iv)
{
$this->_iv = $iv;
}
}
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