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<?php
/**
* The Horde_Cipher_BlockMode:: class provides a common abstracted
* interface to various block mode handlers for ciphers.
*
* $Horde: framework/Cipher/Cipher/BlockMode.php,v 1.14.12.9 2006/01/01 21:28:10 jan Exp $
*
* Copyright 2002-2006 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>
* @since Horde 2.2
* @package Horde_Cipher
*/
class Horde_Cipher_BlockMode {
/**
* The initialization vector.
*
* @var string
*/
var $_iv = "\0\0\0\0\0\0\0\0";
/**
* Attempts to return a concrete Horde_Cipher_BlockMode instance based on
* $mode.
*
* @param string $mode The type of concrete Horde_Cipher_BlockMode
* subclass to return.
* @param array $params A hash containing any additional parameters a
* subclass might need.
*
* @return Horde_Cipher_BlockMode The newly created concrete
* CipherBlockMode instance, or PEAR_Error
* on error.
*/
function &factory($mode, $params = null)
{
$mode = basename($mode);
if (@file_exists(dirname(__FILE__) . '/BlockMode/' . $mode . '.php')) {
require_once dirname(__FILE__) . '/BlockMode/' . $mode . '.php';
}
$class = 'Horde_Cipher_BlockMode_' . $mode;
if (class_exists($class)) {
$blockmode = &new $class($params);
} else {
$blockmode = PEAR::raiseError('Class definition of ' . $class . ' not found.');
}
return $blockmode;
}
/**
* Set the IV
*
* @param string $iv The new IV.
*/
function setIV($iv)
{
$this->_iv = $iv;
}
}
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