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<?php
/**
* @package Joomla.Platform
* @subpackage Utilities
*
* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* JSimpleCrypt is a very simple encryption algorithm for encrypting/decrypting strings
*
* @package Joomla.Platform
* @subpackage Utilities
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
class JSimpleCrypt extends JObject
{
/**
* Encryption/Decryption Key
*
* @var string
*/
protected $_key;
/**
* Object Constructor takes an optional key to be used for encryption/decryption. If no key is given then the
* secret word from the configuration object is used.
*
* @param string $key Optional encryption key
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
public function __construct($key = null)
{
JLog::add('JSimpleCrypt is deprecated. Use JCrypt instead.', JLog::WARNING, 'deprecated');
if ($key)
{
$this->_key = (string) $key;
}
else
{
$conf = &JFactory::getConfig();
$this->_key = md5($conf->get('secret'));
}
}
/**
* Decrypt a string
*
* @param string $s String to decrypt
*
* @return string
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
public function decrypt($s)
{
$ai = $this->_hexToIntArray($s);
(string) $s1 = $this->_xorString($ai);
return $s1;
}
/**
* Encrypt a string
*
* @param string $s String to encrypt
*
* @return string
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
public function encrypt($s)
{
$ai = $this->_xorCharString($s);
$s1 = '';
for ($i = 0, $count = count($ai); $i < $count; $i++)
{
$s1 = $s1 . $this->_intToHex((int) $ai[$i]);
}
return $s1;
}
/**
* Convert hex to an integer
*
* @param string $s The hex string to convert.
* @param integer $i The offset?
*
* @return integer
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
protected function _hexToInt($s, $i)
{
(int) $j = $i * 2;
(string) $s1 = $s;
(string) $c = substr($s1, $j, 1); // get the char at position $j, length 1
(string) $c1 = substr($s1, $j + 1, 1); // get the char at postion $j + 1, length 1
(int) $k = 0;
switch ($c)
{
case "A":
$k += 160;
break;
case "B":
$k += 176;
break;
case "C":
$k += 192;
break;
case "D":
$k += 208;
break;
case "E":
$k += 224;
break;
case "F":
$k += 240;
break;
case " ":
$k += 0;
break;
default:
(int) $k = $k + (16 * (int) $c);
break;
}
switch ($c1)
{
case "A":
$k += 10;
break;
case "B":
$k += 11;
break;
case "C":
$k += 12;
break;
case "D":
$k += 13;
break;
case "E":
$k += 14;
break;
case "F":
$k += 15;
break;
case " ":
$k += 0;
break;
default:
$k += (int) $c1;
break;
}
return $k;
}
/**
* Convert hex to an array of integers
*
* @param string $s The hex string to convert to an integer array.
*
* @return array An array of integers.
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
protected function _hexToIntArray($s)
{
(string) $s1 = $s;
(int) $i = strlen($s1);
(int) $j = $i / 2;
for ($l = 0; $l < $j; $l++)
{
(int) $k = $this->_hexToInt($s1, $l);
$ai[$l] = $k;
}
return $ai;
}
/**
* Convert character string to integer
*
* @param string $c The character to convert to an integer.
*
* @return integer
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
protected function _charToInt($c)
{
$ac[0] = $c;
return $ac;
}
/**
* XorString
*
* @param string $ai The string.
*
* @return string
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
protected function _xorString($ai)
{
$s = $this->_key;
(int) $i = strlen($s);
$ai1 = $ai;
(int) $j = count($ai1);
for ($i = 0; $i < $j; $i = strlen($s))
{
$s = $s . $s;
}
for ($k = 0; $k < $j; $k++)
{
(string) $c = substr($s, $k, 1);
$ac[$k] = chr($ai1[$k] ^ ord($c));
}
(string) $s1 = implode('', $ac);
return $s1;
}
/**
* Convert integer to hex
*
* @param integer $i An integer value to convert.
*
* @return string
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
protected function _intToHex($i)
{
(int) $j = (int) $i / 16;
if ((int) $j == 0)
{
(string) $s = " ";
}
else
{
(string) $s = strtoupper(dechex($j));
}
(int) $k = (int) $i - (int) $j * 16;
(string) $s = $s . strtoupper(dechex($k));
return $s;
}
/**
* Use xor encryption
*
* @param string $s The string.
*
* @return array An array of integers
*
* @since 11.1
* @deprecated 12.3 Use JCrypt instead.
*/
protected function _xorCharString($s)
{
$ac = preg_split('//', $s, -1, PREG_SPLIT_NO_EMPTY);
(string) $s1 = $this->_key;
(int) $i = strlen($s1);
(int) $j = count($ac);
for ($i = 0; $i < $j; $i = strlen($s1))
{
$s1 = $s1 . $s1;
}
for ($k = 0; $k < $j; $k++)
{
$c = substr($s1, $k, 1);
$ai[$k] = ord($c) ^ ord($ac[$k]);
}
return $ai;
}
}
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