Güvenlik Kütüphanesi

define ( PASSWORD, "şifre" );
define ( PASSLEN, 16 );

function get_rnd_iv ( $iv_len ) {
    $iv = '';
    while ( $iv_len-- > 0 ) {
        $iv .= chr ( mt_rand ( ) & 0xFF );
    }
    return $iv;
}

/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
::    md5_encrypt...Rastgele 44 bit şifreleme yapar..
::
*/
function md5_encrypt ( $plain_text, $password = PASSWORD, $iv_len = PASSLEN ) {
    $plain_text .= "\x13";
    $n = strlen ( $plain_text );
    if ( $n % 16 ) $plain_text .= str_repeat ( "\0", 16 - ( $n % 16 ) );
    $i = 0;
    $enc_text = get_rnd_iv ( $iv_len );
    $iv = substr ( $password ^ $enc_text, 0, 512 );
    while ( $i < $n ) {
        $block = substr ( $plain_text, $i, 16 ) ^ pack ( 'H*', md5 ( $iv ) );
        $enc_text .= $block;
        $iv = substr ( $block . $iv, 0, 512 ) ^ $password;
        $i += 16;
    }
    return base64_encode ( $enc_text );
}

/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
::    md5_decrypt...44 bitlik şifreyi çözer..
::
*/
function md5_decrypt ( $enc_text, $password = PASSWORD, $iv_len = PASSLEN ) {
    $enc_text = base64_decode ( $enc_text );
    $n = strlen ( $enc_text );
    $i = $iv_len;
    $plain_text = '';
    $iv = substr ( $password ^ substr ( $enc_text, 0, $iv_len ), 0, 512 );
    while ( $i < $n ) {
        $block = substr ( $enc_text, $i, 16 );
        $plain_text .= $block ^ pack ( 'H*', md5 ( $iv ) );
        $iv = substr ( $block . $iv, 0, 512 ) ^ $password;
        $i += 16;
    }
    return preg_replace ( '/\\x13\\x00*$/', '', $plain_text );
}

$sifreli = md5_encrypt("Lisans");
echo $sifreli."<br />";
$sifresiz = md5_decrypt($sifreli);
echo $sifresiz;

 
function temizle($veri) {
return mysql_real_escape_string(trim(htmlspecialchars($veri))); 
}

 
<?
if(!intval($_GET[no]))
{
echo 'işlem Hatası Oldu Sen Bir Hackermisin ?';
exit(); // Buradaki Exit Önemli exit Kullanmayasaydık Kodların İşleyişi Devam ederdi 
}
?>

<?php
# Lisans
function Arama_Filtrele($kelime){
$kelime = htmlspecialchars(mysql_real_escape(stripslashes($kelime)));
$kelime = str_replace('^','\^',$kelime);
$kelime = str_replace('%','\%',$kelime);
$kelime = str_replace('_','\_',$kelime);
$kelime = str_replace('[','\[',$kelime);
$kelime = str_replace(']','\]',$kelime);
$kelime = str_replace('-','\-',$kelime);
return $kelime;
}
?>

 if(empty($degisken)){  }

 if(!empty($degisken)){  }

 if(empty($degisken)){  }

 if(!empty($degisken)){  }

if ( $degisken == "" )

if ( $degisken != "" )