gistfile1.as

package
{
    import com.hurlant.util.Base64;
    import com.hurlant.crypto.symmetric.AESKey;
    import flash.utils.*;
    
    public class Tester {

        public function descifra_ip(cookie:String, claveCifrado:String) : String {
         var t:ByteArray = Base64.decodeToByteArray(cookie);
         var k:ByteArray = Base64.decodeToByteArray(claveCifrado);
         var v:ByteArray = new ByteArray();
         var v2:ByteArray = new ByteArray();
         var v3:ByteArray = new ByteArray();
         var r:ByteArray = new ByteArray();
         k.position = 24;
         k.writeBytes(t,0,8);
         v.writeBytes(t,8,16);
         k.position = 0;
         v.position = 0;
         var aes:AESKey = new AESKey(k);
         var i:int = 8;
         while(i < t.length)
         {
            v.position = 0;
            v2.position = 0;
            v3.position = 0;
            v.writeBytes(t,i,16);
            v3.writeBytes(v,0,16);
            aes.decrypt(v);
            this.xor(v,v2);
            v2.writeBytes(v3,0,16);
            r.writeBytes(v,0,16);
            i = i + 16;
         }
         aes.dispose();
         var resultado:String = r.toString();
         return resultado;
        }

        public function xor(destino:ByteArray, origen:ByteArray) : void {
         var i:int = 0;
         while(i < destino.length)
         {
            destino[i] = destino[i] ^ origen[i];
            i++;
         }
        }
    }
}

var tester:Tester = new Tester();
var output:String = tester.descifra_ip("93xJGQfvBp6tuYJogOfZoFgPRvvltNLaiZurZKTgi7QWHgTcIcWZCs5Q67Lu1Gv[Q4cfRnPczC5GhN[10bO09yjKYU2sBKR9FAaxuJQVfuEYDs4IJPSGy[5b8Fg1sH]wHaTI3BlyzaQ=", "DKAE2jDQUpC4AvQgqTDRaniTBQCiMrDE1aNUBIuSnWCg");
trace(output);