Encryption and compression, native and managed

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using NETPCryptLib;
using System.Text;

namespace NetWebTest
{
    public partial class NetTestForm : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            int izip = GetLineParam("Zip");
            int ienc = GetLineParam("Enc");
            int iout = GetLineParam("Out");

            string strpost = GetPost(Request);
            if (strpost == "") return;

            string strdec = "Added-" + Encode(false, strpost, izip, ienc, iout) + "-In-WebSite";

            String strenc = Encode(true, strdec, izip, ienc, iout);

            Response.Write(strenc);
            Response.End();
        }
        private string Encode(bool encode, string str, int izip, int ienc, int iout)
        {
            CGlobalKeys gkeys = new CGlobalKeys();
            CNETPInfoFormat info = gkeys.GetInfoFormat();

            byte[] btext = Encoding.ASCII.GetBytes(str);

            info.NETPBuf.optPNetzip = (TNETPEnumZip)izip;
            info.NETPBuf.optPNetencrypt = (TNETPEnumEncrypt)ienc;
            info.NETPBuf.optPNetoutput = (TNETPEnumOutput)iout;

            if (encode)
                info.NETPBuf.optPNetoper = TNETPEnumOperation.TNETPOperEncode;
            else
                info.NETPBuf.optPNetoper = TNETPEnumOperation.TNETPOperDecode;

            btext.CopyTo(info.NETPBuf.NETPbuffer, 0);
            info.NETPBuf.NETPbufferlen = btext.Length;
            info.OpClose();

            String strres = Encoding.ASCII.GetString(info.NETPBuf.NETPbuffer, 0, info.NETPBuf.NETPbufferlen);

            return strres;
        }
        private string GetPost(HttpRequest request)
        {
            System.IO.Stream body = request.InputStream;
            System.Text.Encoding encoding = request.ContentEncoding;
            System.IO.StreamReader reader = new System.IO.StreamReader(body, encoding);
            return reader.ReadToEnd();
        }
        private int GetLineParam(string param)
        {
            if (Request.Params.Get(param) != null)
                return int.Parse(Request.Params.Get(param));
            else
                return 0;
        }
    }
}