%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* PHP Framework
*
* @copyright Copyright 2013, StivaSoft, Ltd. (http://stivasoft.com)
* @link http://www.phpjabbers.com/
* @package framework.components
* @version 1.0.11
*/
/**
* Rivest/Shamir/Adelman (RSA) implementation
*
* @package framework.components
*
*/
class RSA
{
/**
* Modulo
*
* @var int
* @access private
*/
private $n;
/**
* Public key
*
* @var int
* @access private
*/
private $e;
/**
* Private key
*
* @var int
* @access private
*/
private $d;
/**
* Big Numbers library
*
* @var object
* @access private
*/
private $math;
/**
* Constructor - automatically called when you create a new instance of a class with new
*
* @param int $n Modulo
* @param int $e Public key
* @param int $d Private key
* @access public
* @return self
*/
public function __construct($n = 0, $e = 0, $d = 0)
{
$this->n = $n;
$this->e = $e;
$this->d = $d;
if (extension_loaded('gmp'))
{
include_once dirname(__FILE__) . '/pjGMP.component.php';
$this->math = new pjGMP();
} elseif (extension_loaded('bcmath')) {
include_once dirname(__FILE__) . '/pjBCMath.component.php';
$this->math = new pjBCMath();
} elseif (extension_loaded('big_int') || extension_loaded('php_big_int')) {
include_once dirname(__FILE__) . '/pjBigInt.component.php';
$this->math = new pjBigInt();
} else {
//include_once dirname(__FILE__) . '/pjMath.component.php';
//$this->math = new pjMath();
//FIXME
}
return true;
}
/**
* Encryption
*
* @param string $m
* @param int $s
* @access public
* @return string
*/
public function encrypt($m, $s = 3)
{
$coded = '';
$max = strlen($m);
$packets = ceil($max / $s);
for ($i = 0; $i < $packets; $i++)
{
$packet = substr($m, $i * $s, $s);
$code = '0';
for ($j = 0; $j < $s; $j++)
{
if (isset($packet[$j]))
{
$code = $this->math->add($code, $this->math->mul(ord($packet[$j]), $this->math->pow('256', $j)));
}
}
$code = $this->math->powmod($code, $this->e, $this->n);
$coded .= $code.' ';
}
return trim($coded);
}
/**
* Decryption
*
* @param string $c
* @access public
* @return string
*/
public function decrypt($c)
{
$coded = explode(' ', $c);
$message = '';
$max = count($coded);
for ($i = 0; $i < $max; $i++)
{
$code = $this->math->mod($this->math->pow($coded[$i], $this->d), $this->n);
while ($this->math->cmp($code, '0') != 0)
{
$ascii = $this->math->mod($code, '256');
$code = $this->math->div($code, '256', 0);
$message .= chr($ascii);
}
}
return $message;
}
}
?>
Zerion Mini Shell 1.0