encrypt/Form1.cs at main · EricConchaParra/encrypt · GitHub

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

namespace Encriptador
{
    public partial class Form1 : Form
    {
         public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void goEncrypt()
        {
            txtEncriptado.Text = Encriptar(txtDesEncriptado.Text);
        }

        private void goDesEncrypt()
        {
            txtDesEncriptado.Text = DesEncriptar(txtEncriptado.Text);
        }


        public string Encriptar(string texto)
        {
            try
            {

                string key = txtClave.Text; //llave para encriptar datos

                byte[] keyArray;

                byte[] Arreglo_a_Cifrar = UTF8Encoding.UTF8.GetBytes(texto);

                //Se utilizan las clases de encriptación MD5

                MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();

                keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));

                hashmd5.Clear();

                //Algoritmo TripleDES
                TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

                tdes.Key = keyArray;
                tdes.Mode = CipherMode.ECB;
                tdes.Padding = PaddingMode.PKCS7;

                ICryptoTransform cTransform = tdes.CreateEncryptor();

                byte[] ArrayResultado = cTransform.TransformFinalBlock(Arreglo_a_Cifrar, 0, Arreglo_a_Cifrar.Length);

                tdes.Clear();

                //se regresa el resultado en forma de una cadena
                texto = Convert.ToBase64String(ArrayResultado, 0, ArrayResultado.Length);

            }
            catch (Exception)
            {

            }
            return texto;
        }

        public string DesEncriptar(string textoEncriptado)
        {
            try
            {
                string key = txtClave.Text;
                byte[] keyArray;
                byte[] Array_a_Descifrar = Convert.FromBase64String(textoEncriptado);

                //algoritmo MD5
                MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();

                keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));

                hashmd5.Clear();

                TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

                tdes.Key = keyArray;
                tdes.Mode = CipherMode.ECB;
                tdes.Padding = PaddingMode.PKCS7;

                ICryptoTransform cTransform = tdes.CreateDecryptor();

                byte[] resultArray = cTransform.TransformFinalBlock(Array_a_Descifrar, 0, Array_a_Descifrar.Length);

                tdes.Clear();
                textoEncriptado = UTF8Encoding.UTF8.GetString(resultArray);

            }
            catch (Exception)
            {

            }
            return textoEncriptado;
        }

        private void btnEncriptar_Click(object sender, EventArgs e)
        {
            goEncrypt();
        }

        private void btnDesEncriptar_Click(object sender, EventArgs e)
        {
            goDesEncrypt();
        }

        private void desencriptarToolStripMenuItem_Click(object sender, EventArgs e)
        {
            goDesEncrypt();
        }

        private void encriptarToolStripMenuItem_Click(object sender, EventArgs e)
        {
            goEncrypt();
        }

        private void salirToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}