ase

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MojRandsomeware2
{
    public partial class Form1 : Form
    {
        [DllImport("KERNEL32.DLL", EntryPoint = "RtlZeroMemory")]
        public static extern bool ZeroMemory(IntPtr Destination, int Length);

        public Form1()
        {
            InitializeComponent();
        }

        private void btnBrowseFile_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "All Files | *.*" })
            {
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    txtFilePath.Text = ofd.FileName;
                }
            }
        }

        private void FileEncrypt(string inputFileName, string password)
        {
            byte[] passwords = Encoding.UTF8.GetBytes(password);
            byte[] salt = new byte[32];

            RijndaelManaged AES = new RijndaelManaged();
            AES.KeySize = 256;
            AES.BlockSize = 128;
            AES.Padding = PaddingMode.PKCS7;

            var key = new Rfc2898DeriveBytes(password, salt, 50000);
            AES.Key = key.GetBytes(AES.KeySize / 8);
            AES.IV = key.GetBytes(AES.BlockSize / 8);

            AES.Mode = CipherMode.CFB;

            using (FileStream fsCrypt = new FileStream(
                inputFileName + ".aes",
                FileMode.Create))
            {
                fsCrypt.Write(salt, 0, salt.Length);

                using (CryptoStream cs = new CryptoStream(
                    fsCrypt,
                    AES.CreateEncryptor(),
                    CryptoStreamMode.Write))
                {
                    using (FileStream fs =new FileStream(
                        inputFileName,
                        FileMode.Open))
                    {
                        byte[] buffer = new byte[1048576];
                        int read;
                        while ((read = fs.Read(buffer, 0, buffer.Length)) > 0)
                        {
                            cs.Write(buffer, 0, read);
                        }
                    }
                }
            }

        }

        private void btnEncrypt_Click(object sender, EventArgs e)
        {
            GCHandle gCHandle = GCHandle.Alloc(txtPassword.Text, GCHandleType.Pinned);
            FileEncrypt(txtFilePath.Text, txtPassword.Text);
            ZeroMemory(gCHandle.AddrOfPinnedObject(), txtPassword.Text.Length * 2);
            gCHandle.Free();
            MessageBox.Show("Encryption Done!");
        }

        private void FileDecrypt(string inputFileName, string outputFileName, string password)
        {
            byte[] passwrods = Encoding.UTF8.GetBytes(password);
            byte[] salt = new byte[32];

            using(FileStream fsCrypt = new FileStream(
                inputFileName,
                FileMode.Open))
            {
                fsCrypt.Read(salt, 0, salt.Length);

                RijndaelManaged AES = new RijndaelManaged();
                AES.KeySize = 256;
                AES.BlockSize = 128;
                AES.Padding = PaddingMode.PKCS7;

                var key = new Rfc2898DeriveBytes(password, salt, 50000);
                AES.Key = key.GetBytes(AES.KeySize / 8);
                AES.IV = key.GetBytes(AES.BlockSize / 8);

                AES.Mode = CipherMode.CFB;

                using( CryptoStream cs = new CryptoStream(
                    fsCrypt,
                    AES.CreateDecryptor(),
                    CryptoStreamMode.Read))
                {
                    using (FileStream fso = new FileStream(
                        outputFileName,
                        FileMode.Create))
                    {
                        byte[] buffer = new byte[1048576];
                        int read;
                        while((read = cs.Read(buffer, 0, buffer.Length)) > 0)
                        {
                            fso.Write(buffer, 0, read);
                        }
                    }
                }
            }
        }

        private void btnDecrypt_Click(object sender, EventArgs e)
        {
            GCHandle gCHandle = GCHandle.Alloc(txtPassword.Text, GCHandleType.Pinned);
            FileDecrypt(txtFilePath.Text, txtFilePath.Text.Replace(".aes", ""), txtPassword.Text);
            ZeroMemory(gCHandle.AddrOfPinnedObject(), txtPassword.Text.Length * 2);
            gCHandle.Free();
            MessageBox.Show("Decryption Done!");
        }
    }
}