Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web.ApplicationServices/Util/SecurityServices.cs

@@ -0,0 +1,38 @@
+//------------------------------------------------------------------------------
+// <copyright file="SecUtility.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.Util {
+
+    using System;
+    using System.Globalization;
+
+    internal static class SecurityServices {
+
+        // We don't trim the param before checking with password parameters
+        internal static void CheckPasswordParameter(string param, string paramName) {
+            if (param == null) {
+                throw new ArgumentNullException(paramName);
+            }
+
+            CheckForEmptyParameter(param, paramName);
+        }
+
+        internal static void CheckForEmptyOrWhiteSpaceParameter(ref string param, string paramName) {
+            if (param == null) {
+                return;
+            }
+
+            param = param.Trim();
+            CheckForEmptyParameter(param, paramName);            
+        }
+
+        internal static void CheckForEmptyParameter(string param, string paramName) {
+            if (param.Length < 1) {
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, ApplicationServicesStrings.Parameter_can_not_be_empty, paramName), paramName);
+            }
+        }
+    }
+}