Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/IntSecurity.cs

@@ -0,0 +1,38 @@
+//------------------------------------------------------------------------------
+// <copyright file="IntSecurity.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.ComponentModel {
+    using System;
+    using System.Security;
+    using System.Security.Permissions;
+
+    [HostProtection(SharedState = true)]
+    internal static class IntSecurity {
+#if FEATURE_MONO_CAS
+        public static readonly CodeAccessPermission UnmanagedCode = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
+        public static readonly CodeAccessPermission FullReflection = new ReflectionPermission(PermissionState.Unrestricted);
+#endif
+
+        public static string UnsafeGetFullPath(string fileName) {
+#if FEATURE_MONO_CAS
+            string full = fileName;
+
+            FileIOPermission fiop = new FileIOPermission(PermissionState.None);
+            fiop.AllFiles = FileIOPermissionAccess.PathDiscovery;
+            fiop.Assert();
+            try {
+                full = System.IO.Path.GetFullPath(fileName);
+            }
+            finally {
+                CodeAccessPermission.RevertAssert();
+            }
+            return full;
+#else
+            return System.IO.Path.GetFullPath(fileName);
+#endif
+        }
+    }
+}