RestaurantSite_API/ProRestaurant/Classes/CommonFunctions.cs

using Microsoft.AspNetCore.Http;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ProRestaurant.Classes
{
    public class CommonFunctions
    {
        public static string GetHashSHA256(string text)
        {            
            SHA256Managed crypt = new SHA256Managed();
            string hash = string.Empty;
            byte[] crypto = crypt.ComputeHash(Encoding.UTF8.GetBytes(text), 0, Encoding.UTF8.GetByteCount(text));
            foreach (byte bit in crypto)
            {
                hash += bit.ToString("x2");
            }
            return hash;
        }

        public static string GenerateRandomPassword()
        {
            string values = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%_";
            char[] chars = values.ToArray();
            ArrayList used = new ArrayList();

            string password = "";
            while (password.Length < 10)
            {
                Random r = new Random();
                int i = r.Next(0, values.Length);
                if (!used.Contains(chars[i].ToString()))
                {
                    password += chars[i].ToString();
                    used.Add(chars[i].ToString());
                }
            }

            return password;
        }
    }
}