CleanAuLait MVVM Framework

Fork

using System.Security.Cryptography;
using System.Text;

namespace CleanAuLait.Core.Converter
{
    public static class CryptoHelper
    {
        public static byte[] GenerateEntropy(int length)
        {
            return RandomNumberGenerator.GetBytes(length);
        }

        public static byte[] ProtectData(string str, byte[] entropy)
        {
            if (str == null)
            {
                return null;
            }

            if (entropy == null || entropy.Length == 0)
            {
                return null;
            }

            byte[] data = Encoding.UTF8.GetBytes(str);
            byte[] encrypted = ProtectedData.Protect(data, entropy, DataProtectionScope.CurrentUser);

            return encrypted;
        }

        public static string UnprotectData(byte[] encrypted, byte[] entropy)
        {
            if (encrypted == null || encrypted.Length == 0)
            {
                return null;
            }

            if (entropy == null || entropy.Length == 0)
            {
                return null;
            }

            byte[] data = ProtectedData.Unprotect(encrypted, entropy, DataProtectionScope.CurrentUser);
            string str = Encoding.UTF8.GetString(data);

            return str;
        }
    }
}