public ActionResult Edit(Encriptacao.Models.UsuarioModel usuarioModel)
        {
            Models.UsuarioModel usuario = db.Usuarios.Find(usuarioModel.Id);
            usuarioModel.Senha         = usuario.Senha;
            usuarioModel.ConfirmaSenha = usuario.Senha;
            db.Entry(usuario).State    = EntityState.Detached;

            AesCryptoServiceProvider aes = new AesCryptoServiceProvider();

            aes.BlockSize = 128;
            aes.KeySize   = 256;
            aes.IV        = Encoding.UTF8.GetBytes(AesIV256BD);
            aes.Key       = Encoding.UTF8.GetBytes(AesKey256BD);
            aes.Mode      = CipherMode.CBC;
            aes.Padding   = PaddingMode.PKCS7;

            byte[] src = Encoding.Unicode.GetBytes(usuarioModel.Email);

            using (ICryptoTransform encrypt = aes.CreateEncryptor())
            {
                byte[] dest = encrypt.TransformFinalBlock(src, 0, src.Length);
                usuarioModel.Email = Convert.ToBase64String(dest);
            }

            db.Entry(usuarioModel).State = EntityState.Modified;
            db.SaveChanges();
            return(RedirectToAction("Index"));
        }
        public ActionResult Edit(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }

            Encriptacao.Models.UsuarioModel usuarioModel = db.Usuarios.Find(id);

            if (usuarioModel == null)
            {
                return(HttpNotFound());
            }

            AesCryptoServiceProvider aes = new AesCryptoServiceProvider();

            aes.BlockSize = 128;
            aes.KeySize   = 256;
            aes.IV        = Encoding.UTF8.GetBytes(AesIV256BD);
            aes.Key       = Encoding.UTF8.GetBytes(AesKey256BD);
            aes.Mode      = CipherMode.CBC;
            aes.Padding   = PaddingMode.PKCS7;

            byte[] src = Convert.FromBase64String(usuarioModel.Email);

            using (ICryptoTransform decrypt = aes.CreateDecryptor())
            {
                byte[] dest = decrypt.TransformFinalBlock(src, 0, src.Length);
                usuarioModel.Email = Encoding.Unicode.GetString(dest);
            }
            return(View(usuarioModel));
        }