encryption and decryption of data in C#

Hi Team

I am facing an error, i have tried to add and remove, add back dll files into bin folder. Still no luck and dont know how to fix this issue ' the name 'decrypt' does not exist in the current context. Here are my class for this.

//IdentityConfig.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin;
using Microsoft.Owin.Security;
using eNtsaTrainingRegistration.Models;
using System.Net.Mail;
using System.Net;
using System.Web.Configuration;
namespace eNtsaTrainingRegistration
{
public class EmailService : IIdentityMessageService
{
public Task SendAsync(IdentityMessage message)
{
var mailMessage = new MailMessage();
mailMessage.To.Add(new MailAddress(message.Destination));
mailMessage.From = new MailAddress("Gcobani Mkontwana ");
mailMessage.Subject = message.Subject;
mailMessage.IsBodyHtml = true;
mailMessage.Body = message.Body;
using(var smtp = new SmtpClient())
{
var credential = new NetworkCredential
{
UserName = WebConfigurationManager.AppSettings["UserName"],
Password = Helper.Decrypt(WebConfigurationManager.AppSettings["UserPassword"])
};
smtp.Credentials = credential;
smtp.Host = WebConfigurationManager.AppSettings["SMTPName"];
smtp.Port = int.Parse(WebConfigurationManager.AppSettings["SMTPPort"]);
smtp.EnableSsl = true;
smtp.Send(mailMessage);
}
return Task.FromResult(0);
}
}
}
// Helper.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.IO;
using System.Security.Cryptography;
namespace eNtsaTrainingRegistration.Helper
{
public class Helper
{
private const string PassPhrase = "3pAc0j$_56K?_S7c9gS!";
//Encrypt password.
public static string Encrypt(string strValue)
{
byte[] results;
UTF8Encoding uTF8 = new UTF8Encoding();
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] deskey = md5.ComputeHash(uTF8.GetBytes(PassPhrase));
TripleDESCryptoServiceProvider desalg = new TripleDESCryptoServiceProvider();
desalg.Key = deskey;
desalg.Mode = CipherMode.ECB;
desalg.Padding = PaddingMode.PKCS7;
byte[] encrypt_data = uTF8.GetBytes(strValue);
try
{
ICryptoTransform encrytor = desalg.CreateEncryptor();
results = encrytor.TransformFinalBlock(encrypt_data, 0, encrypt_data.Length);
}
finally
{
desalg.Clear();
md5.Clear();
}
return Convert.ToBase64String(results);
}
//Decrypt password.
public static string Decrypt(string strValue)
{
byte[] results;
UTF8Encoding uTF8 = new UTF8Encoding();
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] deskey = md5.ComputeHash(uTF8.GetBytes(PassPhrase));
TripleDESCryptoServiceProvider desalg = new TripleDESCryptoServiceProvider();
desalg.Key = deskey;
desalg.Mode = CipherMode.ECB;
desalg.Padding = PaddingMode.PKCS7;
byte[] decrypt_data = Convert.FromBase64String(strValue);
try
{
ICryptoTransform decryptor = desalg.CreateDecryptor();
results = decryptor.TransformFinalBlock(decrypt_data, 0, decrypt_data.Length);
}
finally
{
desalg.Clear();
md5.Clear();
}
return uTF8.GetString(results);
}
// In between space
public static string GetBetween(string strSource, string strStart, string strEnd)
{
int Start, End;
if(strSource.Contains(strStart) && strSource.Contains(strEnd))
{
Start = strSource.IndexOf(strStart, 0) + strStart.Length;
End = strSource.IndexOf(strEnd, Start);
return strSource.Substring(Start, End - Start);
}else
{
return "";
}
}
public static string BytesToString(long byteCount)
{
string[] suf = { "B", "KB", "MB", "GB", "TB", "PB", "EB" };
if (byteCount == 0)
return string.Format("{0} {1}", 0, suf[0]);
long bytes = Math.Abs(byteCount);
int place = Convert.ToInt32(Math.Floor(Math.Log(bytes, 1024)));
double num = Math.Round(bytes / Math.Pow(1024, place), 1);
return string.Format("{0} {1}", (Math.Sign(byteCount) * num).ToString(), suf[place]);
}
}
}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Amit Mohanty6y ago
Accepted answer
Remove .Helper from namespace in the helper class.
Use like this
namespace eNtsaTrainingRegistration
{
    // your code
}
0
Ravi Patel6y ago
Hi,

try this one it will work or change the name space

Password = eNtsaTrainingRegistration.Helper.Helper.Decrypt(WebConfigurationManager.AppSettings["UserPassword"])
0