From 5b2f0fbf59e603b44621f84c1ca123c302e016c4 Mon Sep 17 00:00:00 2001
From: Ben <zyhfish@163.com>
Date: Tue, 25 Jul 2017 11:26:26 +0800
Subject: [PATCH] CONTENT-8414: compatible with .net 35.

---
 Components/Checks/CheckDefaultPage.cs |  7 -----
 Components/Utility.cs                 | 38 +++++++++++++++++----------
 2 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/Components/Checks/CheckDefaultPage.cs b/Components/Checks/CheckDefaultPage.cs
index 6882294..bf458ba 100644
--- a/Components/Checks/CheckDefaultPage.cs
+++ b/Components/Checks/CheckDefaultPage.cs
@@ -14,13 +14,6 @@ public class CheckDefaultPage : IAuditCheck
         public CheckResult Execute()
         {
             var result = new CheckResult(SeverityEnum.Unverified, "CheckDefaultPage");
-            var version = Environment.Version.ToString(2);
-            if (version == "2.0")
-            {
-                result.Notes.Add("This check requires .Net Version 4.0 or above");
-                return result;
-            }
-            
             try
             {
                 IList<string> modifiedFiles;
diff --git a/Components/Utility.cs b/Components/Utility.cs
index 2af2d6c..1213b6c 100644
--- a/Components/Utility.cs
+++ b/Components/Utility.cs
@@ -182,7 +182,7 @@ public static XmlDocument LoadFileSumData()
 
         public static string GetFileCheckSum(string fileName)
         {
-            using (var cryptographyProvider = SHA256.Create(AllowOnlyFipsAlgorithms() ? "System.Security.Cryptography.SHA256CryptoServiceProvider" : "System.Security.Cryptography.SHA256Cng"))
+            using (var cryptographyProvider = CreateCryptographyProvider())
             {
                 if (cryptographyProvider != null)
                 {
@@ -197,6 +197,29 @@ public static string GetFileCheckSum(string fileName)
             return string.Empty;
         }
 
+        private static SHA256 CreateCryptographyProvider()
+        {
+            try
+            {
+                var property = typeof(CryptoConfig).GetProperty("AllowOnlyFipsAlgorithms", BindingFlags.Public | BindingFlags.Static);
+                if (property == null)
+                {
+                    return SHA256.Create();
+                }
+
+                if ((bool) property.GetValue(null, null))
+                {
+                    return SHA256.Create("System.Security.Cryptography.SHA256CryptoServiceProvider");
+                }
+
+                return SHA256.Create("System.Security.Cryptography.SHA256Cng");
+            }
+            catch (Exception)
+            {
+                return null;
+            }
+        }
+
         public static string GetApplicationVersion()
         {
             return DotNetNukeContext.Current.Application.Version.ToString(3);
@@ -253,18 +276,5 @@ public static IList<FileInfo> GetLastModifiedExecutableFiles()
             .Take(ModifiedFilesCount).ToList();
 
         }
-
-        private static bool AllowOnlyFipsAlgorithms()
-        {
-            try
-            {
-                var property = typeof(CryptoConfig).GetProperty("AllowOnlyFipsAlgorithms", BindingFlags.Public | BindingFlags.Static);
-                return property != null && (bool)property.GetValue(null, null);
-            }
-            catch (Exception)
-            {
-                return false;
-            }
-        }
     }
 }
\ No newline at end of file