【修改】加解密优化；

Learun.Framework.Ultimate V7/Learun.Framework.Module/Learun.Util/Learun.Util/Security/DESEncrypt.cs

@@ -33,8 +33,8 @@ namespace Learun.Util
         /// <returns></returns> 
         public static string Encrypt(string Text, string sKey, bool md5 = true)
         {
-            var key = sKey;
-            var iv = sKey;
+            var key = sKey.Substring(0, 8);
+            var iv = sKey.Substring(0, 8);
             if (md5)
             {
                 key = Md5Helper.Hash(sKey).ToUpper().Substring(0, 8);
@@ -84,8 +84,8 @@ namespace Learun.Util
         /// <returns></returns> 
         public static string Decrypt(string Text, string sKey, bool md5 = true)
         {
-            var key = sKey;
-            var iv = sKey;
+            var key = sKey.Substring(0, 8);
+            var iv = sKey.Substring(0, 8);
             if (md5)
             {
                 key = Md5Helper.Hash(sKey).ToUpper().Substring(0, 8);