IntSecurity.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CommonUI / System / Drawing / IntSecurity.cs / 1305376 / IntSecurity.cs
                        

                        
                            namespace System.Drawing { 
    using System;
    using System.IO;
    using System.Security;
    using System.Security.Permissions; 
    using System.Drawing.Printing;
    using System.Runtime.Versioning; 
 
    internal static class IntSecurity {
        private static readonly UIPermission AllWindows = new UIPermission(UIPermissionWindow.AllWindows); 
        private static readonly UIPermission SafeSubWindows = new UIPermission(UIPermissionWindow.SafeSubWindows);

        public static readonly CodeAccessPermission UnmanagedCode = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
 
        public static readonly CodeAccessPermission ObjectFromWin32Handle = UnmanagedCode;
        public static readonly CodeAccessPermission Win32HandleManipulation = UnmanagedCode; 
 
        public static readonly PrintingPermission NoPrinting = new PrintingPermission(PrintingPermissionLevel.NoPrinting);
        public static readonly PrintingPermission SafePrinting = new PrintingPermission(PrintingPermissionLevel.SafePrinting); 
        public static readonly PrintingPermission DefaultPrinting = new PrintingPermission(PrintingPermissionLevel.DefaultPrinting);
        public static readonly PrintingPermission AllPrinting = new PrintingPermission(PrintingPermissionLevel.AllPrinting);

        [ResourceExposure(ResourceScope.None)] 
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
        internal static void DemandReadFileIO(string fileName) { 
            string full = fileName; 

            full = UnsafeGetFullPath(fileName); 

            new FileIOPermission(FileIOPermissionAccess.Read, full).Demand();
        }
 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] 
        internal static void DemandWriteFileIO(string fileName) { 
            string full = fileName;
 
            full = UnsafeGetFullPath(fileName);

            new FileIOPermission(FileIOPermissionAccess.Write, full).Demand();
        } 

        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)] 
        internal static string UnsafeGetFullPath(string fileName) {
            string full = fileName; 

            FileIOPermission fiop = new FileIOPermission(PermissionState.None);
            fiop.AllFiles = FileIOPermissionAccess.PathDiscovery;
            fiop.Assert(); 

            try { 
                full = Path.GetFullPath(fileName); 
            } finally {
                CodeAccessPermission.RevertAssert(); 
            }

            return full;
        } 

        static PermissionSet allPrintingAndUnmanagedCode; 
        public static PermissionSet AllPrintingAndUnmanagedCode { 
            get {
                if (allPrintingAndUnmanagedCode == null) { 
                    PermissionSet temp = new PermissionSet(PermissionState.None);
                    temp.SetPermission(IntSecurity.UnmanagedCode);
                    temp.SetPermission(IntSecurity.AllPrinting);
                    allPrintingAndUnmanagedCode = temp; 
                }
                return allPrintingAndUnmanagedCode; 
            } 
        }
 
        internal static bool HasPermission(PrintingPermission permission) {
            try {
                permission.Demand();
                return true; 
            }
            catch (SecurityException) { 
                return false; 
            }
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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