xp-dev.com Git - CPE_learningsite/blob - CPE/CPE.App/CPE.App.Web/Helpers/VerifyAccess.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using System.Web;
   5 using CPE.App.Web.Models;
   6 using System.Security.Cryptography;
   7 using System.Configuration;
   8 using System.Text;
   9 using CPE.App.Web.Code;
  10
  11 namespace CPE.App.Web.Helpers
  12 {
  13     public class VerifyAccess
  14     {
  15         public static bool IsValid(PurchasedCourse course)
  16         {
  17             return (((course.PurchaseDate).AddYears(1)) > DateTime.UtcNow);
  18         }
  19         public static bool VerifyTicket(string ticket, string contenturl, string firstname, string lastname, string email)
  20         {
  21             string secret = ConfigurationManager.AppSettings["CPE.SecretWord"];
  22             string seed = (contenturl + firstname + lastname + email + secret).ToLower();
  23             return ticket.Equals(sha256_hash(seed).Substring(4, 6));
  24         }
  25         public static bool VerifyTicket(string ticket, string contenturl, string firstname, string lastname, string email, string purchasedate)
  26         {
  27             string secret = ConfigurationManager.AppSettings["CPE.SecretWord"];
  28             string seed = (contenturl + firstname + lastname + email + purchasedate + secret).ToLower();
  29             return ticket.Equals(sha256_hash(seed).Substring(4, 6));
  30         }
  31         public static bool AccessBlocked(PurchasedCourse course)
  32         {
  33             BlockedPurchase blockedCourse = BaseController.Database.BlockedPurchases.SingleOrDefault(bc => bc.Ticket == course.Ticket && bc.ContentUrl == course.ContentUrl && bc.Email == course.Email);
  34             return (blockedCourse != null);
  35         }
  36         public static string generateTicket(string contenturl, string firstname, string lastname, string email, string purchasedate)
  37         {
  38             string secret = ConfigurationManager.AppSettings["CPE.SecretWord"];
  39             string seed = (contenturl + firstname + lastname + email + purchasedate + secret).ToLower();
  40             return sha256_hash(seed).Substring(4, 6);
  41         }
  42         private static String sha256_hash(String value)
  43         {
  44             using (SHA256 hash = SHA256Managed.Create())
  45             {
  46                 return String.Join("", hash
  47                   .ComputeHash(Encoding.UTF8.GetBytes(value))
  48                   .Select(item => item.ToString("x2")));
  49             }
  50         }
  51     }
  52 }