Viewing file:  toba_encriptador.php (2.22 KB) -rw-r--r--
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<?php
/**
* Basado en la encriptacion de ADOdb
* @package Varios
*/
class toba_encriptador
{
static private $instancia;
var $clave;
private function __construct() {
$this->clave = toba::instalacion()->get_claves_encriptacion();
}
static function instancia() {
if (!isset(self::$instancia)) {
self::$instancia = new toba_encriptador();
}
return self::$instancia;
}
function cifrar($no_encriptado, $clave="get")
{
$cifrado = $this->Encrypt($no_encriptado,$this->clave[$clave]);
if ($clave == 'get') {
return urlencode($cifrado);
} else {
return $cifrado;
}
}
function descifrar($encriptado, $clave="get")
{
$descifrado = $this->Decrypt($encriptado,$this->clave[$clave]);
if ($clave == 'get') {
return urldecode($descifrado);
} else {
return $descifrado;
}
}
//-------------------------------------------------------------
// Segun ADOdb: Session Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com>
//-------------------------------------------------------------
function keyED($txt,$encrypt_key)
{
$encrypt_key = md5($encrypt_key);
$ctr=0;
$tmp = "";
for ($i=0;$i<strlen($txt);$i++){
if ($ctr==strlen($encrypt_key)) $ctr=0;
$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
$ctr++;
}
return $tmp;
}
function Encrypt($txt,$key)
{
srand((double)microtime()*1000000);
$encrypt_key = md5(rand(0,32000));
$ctr=0;
$tmp = "";
for ($i=0;$i<strlen($txt);$i++)
{
if ($ctr==strlen($encrypt_key)) $ctr=0;
$tmp.= substr($encrypt_key,$ctr,1) .
(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
$ctr++;
}
return base64_encode($this->keyED($tmp,$key));
}
function Decrypt($txt,$key)
{
$txt = $this->keyED(base64_decode($txt),$key);
$tmp = "";
for ($i=0;$i<strlen($txt);$i++){
$md5 = substr($txt,$i,1);
$i++;
$tmp.= (substr($txt,$i,1) ^ $md5);
}
return $tmp;
}
function RandPass()
{
$randomPassword = "";
srand((double)microtime()*1000000);
for($i=0;$i<8;$i++)
{
$randnumber = rand(48,120);
while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
{
$randnumber = rand(48,120);
}
$randomPassword .= chr($randnumber);
}
return $randomPassword;
}
}
?>
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