using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
  namespace Criptare
{
    public partial class Form1 : Form
    {

        AesCryptoServiceProvider cryptoProvider;
        ICryptoTransform encryptor;
        ICryptoTransform decryptor;
        public Form1()
        {
            InitializeComponent();
            cryptoProvider= new AesCryptoServiceProvider();
             encryptor = cryptoProvider.CreateEncryptor();

        }

        private void button1_Click(object sender, EventArgs e) {
            var fileContent = string.Empty;
            var filePath = string.Empty;
            using (OpenFileDialog openFileDialog = new OpenFileDialog())
            {
                if (openFileDialog.ShowDialog() == DialogResult.OK)
                {
                    filePath = openFileDialog.FileName;
                    var fileStream = openFileDialog.OpenFile();
                }
            }
            MessageBox.Show(fileContent, "File Content at path: " + filePath, MessageBoxButtons.OK);
            FileStream fin = new FileStream(filePath,  FileMode.Open, FileAccess.Read);
            FileStream fout = new FileStream("D:/dest.enc", FileMode.OpenOrCreate, FileAccess.Write);

            CryptoStream stream = new CryptoStream(fout, encryptor, CryptoStreamMode.Write);
            byte[] input = new byte[128];
            int inLen = -1;
            while ((inLen = fin.Read(input, 0, 128)) > 0)
            {
                stream.Write(input, 0, inLen);
            }
            stream.Close(); fout.Close(); fin.Close();
        }

        private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            var fileContent = string.Empty;
            var filePath = string.Empty;
            using (OpenFileDialog openFileDialog = new OpenFileDialog())
            {
                if (openFileDialog.ShowDialog() == DialogResult.OK)
                {
                    filePath = openFileDialog.FileName;
                    var fileStream = openFileDialog.OpenFile();
                }
            }
            MessageBox.Show(fileContent, "File Content at path: " + filePath, MessageBoxButtons.OK);
            FileStream fin = new FileStream("D://dest.enc", FileMode.Open, FileAccess.Read);
            FileStream fout = new FileStream("D://source.enc.dec.jpg", FileMode.OpenOrCreate, FileAccess.Write);
            decryptor = cryptoProvider.CreateDecryptor(cryptoProvider.Key,cryptoProvider.IV);
            CryptoStream stream = new CryptoStream(fout,decryptor, CryptoStreamMode.Write);
            byte[] input = new byte[128];
            int inLen = -1;
            while ((inLen = fin.Read(input, 0, 128)) > 0)
            {
                stream.Write(input, 0, inLen);
            }
            stream.Close(); fout.Close(); fin.Close();

        }
    }
}