WinFormsSecurity.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / WinFormsSecurity.cs / 1305376 / WinFormsSecurity.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 */ 
namespace System.Windows.Forms {
 
    using System.Diagnostics;
    using System.Diagnostics.CodeAnalysis;
    using System;
    using System.IO; 
    using System.Security.Permissions;
    using System.Security; 
    using System.Drawing.Printing; 
    using System.Runtime.Versioning;
 
    internal static class IntSecurity {
        public static readonly TraceSwitch SecurityDemand = new TraceSwitch("SecurityDemand", "Trace when security demands occur.");
#if DEBUG
        public static readonly BooleanSwitch MapSafeTopLevelToSafeSub = new BooleanSwitch("MapSafeTopLevelToSafeSub", "Maps the SafeTopLevelWindow UI permission to SafeSubWindow permission. Must restart to take effect."); 
#endif
 
        private static CodeAccessPermission adjustCursorClip; 
        private static CodeAccessPermission affectMachineState;
        private static CodeAccessPermission affectThreadBehavior; 
        private static CodeAccessPermission allPrinting;
        private static PermissionSet        allPrintingAndUnmanagedCode; // Can't assert twice in the same method
        private static CodeAccessPermission allWindows;
        private static CodeAccessPermission clipboardRead; 
        private static CodeAccessPermission clipboardOwn;
        private static PermissionSet        clipboardWrite; // Can't assert twice in the same method 
        private static CodeAccessPermission changeWindowRegionForTopLevel; 
        private static CodeAccessPermission controlFromHandleOrLocation;
        private static CodeAccessPermission createAnyWindow; 
        private static CodeAccessPermission createGraphicsForControl;
        private static CodeAccessPermission defaultPrinting;
        private static CodeAccessPermission fileDialogCustomization;
        private static CodeAccessPermission fileDialogOpenFile; 
        private static CodeAccessPermission fileDialogSaveFile;
        private static CodeAccessPermission getCapture; 
        private static CodeAccessPermission getParent; 
        private static CodeAccessPermission manipulateWndProcAndHandles;
        private static CodeAccessPermission modifyCursor; 
        private static CodeAccessPermission modifyFocus;
        private static CodeAccessPermission objectFromWin32Handle;
        private static CodeAccessPermission safePrinting;
        private static CodeAccessPermission safeSubWindows; 
        private static CodeAccessPermission safeTopLevelWindows;
        private static CodeAccessPermission sendMessages; 
        private static CodeAccessPermission sensitiveSystemInformation; 
        private static CodeAccessPermission transparentWindows;
        private static CodeAccessPermission topLevelWindow; 
        private static CodeAccessPermission unmanagedCode;
        private static CodeAccessPermission unrestrictedWindows;
        private static CodeAccessPermission windowAdornmentModification;
 
        /* Unused permissions
        private static CodeAccessPermission win32HandleManipulation; 
        private static CodeAccessPermission minimizeWindowProgrammatically; 
        private static CodeAccessPermission restrictedWebBrowserPermission;
        private static CodeAccessPermission noPrinting; 
        private static CodeAccessPermission topMostWindow;
        private static CodeAccessPermission unrestrictedEnvironment;
        private static CodeAccessPermission autoComplete;
        private static CodeAccessPermission defaultWebBrowserPermission; 
        private static CodeAccessPermission screenDC;
        */ 
 
        //
        // Property accessors for permissions.  Don't allocate permissions up front -- always 
        // demand create them.  A great many codepaths never need all these permissions so it is wasteful to
        // create them.
        //
 

        public static CodeAccessPermission AdjustCursorClip { 
            get { 
                if (adjustCursorClip == null) {
                    adjustCursorClip = AllWindows; 
                }
                return adjustCursorClip;
            }
        } 

        public static CodeAccessPermission AdjustCursorPosition { 
            get { 
                return AllWindows;
            } 
        }

        public static CodeAccessPermission AffectMachineState {
            get { 
                if (affectMachineState == null) {
                    affectMachineState = UnmanagedCode; 
                } 
                return affectMachineState;
            } 
        }

        public static CodeAccessPermission AffectThreadBehavior {
            get { 
                if (affectThreadBehavior == null) {
                    affectThreadBehavior = UnmanagedCode; 
                } 
                return affectThreadBehavior;
            } 
        }

        public static CodeAccessPermission AllPrinting {
            get { 
                if (allPrinting == null) {
                    allPrinting = new PrintingPermission(PrintingPermissionLevel.AllPrinting); 
                } 
                return allPrinting;
            } 
        }

        public static PermissionSet AllPrintingAndUnmanagedCode { // Can't assert twice in the same method. See ASURT 52788.
            get { 
                if (allPrintingAndUnmanagedCode == null) {
                    PermissionSet temp = new PermissionSet(PermissionState.None); 
                    temp.SetPermission(IntSecurity.UnmanagedCode); 
                    temp.SetPermission(IntSecurity.AllPrinting);
                    allPrintingAndUnmanagedCode = temp; 
                }
                return allPrintingAndUnmanagedCode;
            }
        } 

        public static CodeAccessPermission AllWindows { 
            get { 
                if (allWindows == null) {
                    allWindows = new UIPermission(UIPermissionWindow.AllWindows); 
                }
                return allWindows;
            }
        } 

        public static CodeAccessPermission ClipboardRead { 
            get { 
                if (clipboardRead == null) {
                    clipboardRead = new UIPermission(UIPermissionClipboard.AllClipboard); 
                }
                return clipboardRead;
            }
        } 

        public static CodeAccessPermission ClipboardOwn { 
            get { 
                if (clipboardOwn == null) {
                    clipboardOwn = new UIPermission(UIPermissionClipboard.OwnClipboard); 
                }
                return clipboardOwn;
            }
        } 

        public static PermissionSet ClipboardWrite { // Can't assert OwnClipboard & UnmanagedCode in the same context, need permission set. 
            get { 
                if (clipboardWrite == null) {
                    clipboardWrite = new PermissionSet(PermissionState.None); 
                    clipboardWrite.SetPermission(IntSecurity.UnmanagedCode);
                    clipboardWrite.SetPermission(IntSecurity.ClipboardOwn);
                }
                return clipboardWrite; 
            }
        } 
 
        public static CodeAccessPermission ChangeWindowRegionForTopLevel {
            get { 
                if (changeWindowRegionForTopLevel == null) {
                    changeWindowRegionForTopLevel = AllWindows;
                }
                return changeWindowRegionForTopLevel; 
            }
        } 
 
        public static CodeAccessPermission ControlFromHandleOrLocation {
            get { 
                if (controlFromHandleOrLocation == null) {
                    controlFromHandleOrLocation = AllWindows;
                }
                return controlFromHandleOrLocation; 
            }
        } 
 
        public static CodeAccessPermission CreateAnyWindow {
            get { 
                if (createAnyWindow == null) {
                    createAnyWindow = SafeSubWindows;
                }
                return createAnyWindow; 
            }
        } 
 
        public static CodeAccessPermission CreateGraphicsForControl {
            get { 
                if (createGraphicsForControl == null) {
                    createGraphicsForControl = SafeSubWindows;
                }
                return createGraphicsForControl; 
            }
        } 
 
        public static CodeAccessPermission DefaultPrinting {
            get { 
                if (defaultPrinting == null) {
                    defaultPrinting = new PrintingPermission(PrintingPermissionLevel.DefaultPrinting);
                }
                return defaultPrinting; 
            }
        } 
 
        public static CodeAccessPermission FileDialogCustomization {
            get { 
                if (fileDialogCustomization == null) {
                    fileDialogCustomization = new FileIOPermission(PermissionState.Unrestricted);
                }
                return fileDialogCustomization; 
            }
        } 
 
        public static CodeAccessPermission FileDialogOpenFile {
            get { 
                if (fileDialogOpenFile == null) {
                    fileDialogOpenFile = new FileDialogPermission(FileDialogPermissionAccess.Open);
                }
                return fileDialogOpenFile; 
            }
        } 
 
        public static CodeAccessPermission FileDialogSaveFile {
            get { 
                if (fileDialogSaveFile == null) {
                    fileDialogSaveFile = new FileDialogPermission(FileDialogPermissionAccess.Save);
                }
                return fileDialogSaveFile; 
            }
        } 
 
        /* Unused
        public static CodeAccessPermission RestrictedWebBrowserPermission { 
            get {
                if (restrictedWebBrowserPermission == null) {
                    restrictedWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Restricted);
                } 
                return restrictedWebBrowserPermission;
            } 
        } 

        public static CodeAccessPermission DefaultWebBrowserPermission { 
            get {
                if (defaultWebBrowserPermission == null) {
                    defaultWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Default);
                } 
                return defaultWebBrowserPermission;
            } 
        } 
        */
 
        public static CodeAccessPermission GetCapture {
            get {
                if (getCapture == null) {
                    getCapture = AllWindows; 
                }
                return getCapture; 
            } 
        }
 
        public static CodeAccessPermission GetParent {
            get {
                if (getParent == null) {
                    getParent = AllWindows; 
                }
                return getParent; 
            } 
        }
 
        public static CodeAccessPermission ManipulateWndProcAndHandles {
            get {
                if (manipulateWndProcAndHandles == null) {
                    manipulateWndProcAndHandles = AllWindows; 
                }
                return manipulateWndProcAndHandles; 
            } 
        }
 
        /* Unused
        public static CodeAccessPermission MinimizeWindowProgrammatically {
            get {
                if (minimizeWindowProgrammatically == null) { 
                    minimizeWindowProgrammatically = AllWindows;
                } 
                return minimizeWindowProgrammatically; 
            }
        } 
        */

        public static CodeAccessPermission ModifyCursor {
            get { 
                if (modifyCursor == null) {
                    modifyCursor = SafeSubWindows; 
                } 
                return modifyCursor;
            } 
        }

        public static CodeAccessPermission ModifyFocus {
            get { 
                if (modifyFocus == null) {
                    modifyFocus = AllWindows; 
                } 
                return modifyFocus;
            } 
        }

        /* Unused
        public static CodeAccessPermission NoPrinting { 
            get {
                if (noPrinting == null) { 
                    noPrinting = new PrintingPermission(PrintingPermissionLevel.NoPrinting); 
                }
                return noPrinting; 
            }
        }
        */
 
        public static CodeAccessPermission ObjectFromWin32Handle {
            get { 
                if (objectFromWin32Handle == null) { 
                    objectFromWin32Handle = UnmanagedCode;
                } 
                return objectFromWin32Handle;
            }
        }
 
        public static CodeAccessPermission SafePrinting {
            get { 
                if (safePrinting == null) { 
                    safePrinting = new PrintingPermission(PrintingPermissionLevel.SafePrinting);
                } 
                return safePrinting;
            }
        }
 
        public static CodeAccessPermission SafeSubWindows {
            get { 
                if (safeSubWindows == null) { 
                    safeSubWindows = new UIPermission(UIPermissionWindow.SafeSubWindows);
                } 
                return safeSubWindows;
            }
        }
 
        public static CodeAccessPermission SafeTopLevelWindows {
            get { 
                if (safeTopLevelWindows == null) { 
                    safeTopLevelWindows = new UIPermission(UIPermissionWindow.SafeTopLevelWindows);
                } 
                return safeTopLevelWindows;
            }
        }
 
        public static CodeAccessPermission SendMessages {
            get { 
                if (sendMessages == null) { 
                    sendMessages = UnmanagedCode;
                } 
                return sendMessages;
            }
        }
 
        public static CodeAccessPermission SensitiveSystemInformation {
            get { 
                if (sensitiveSystemInformation == null) { 
                    sensitiveSystemInformation = new EnvironmentPermission(PermissionState.Unrestricted);
                } 
                return sensitiveSystemInformation;
            }
        }
 
        /* Unused
        public static CodeAccessPermission ScreenDC { 
            get { 
                if (screenDC == null) {
                    screenDC = AllWindows; 
                }
                return screenDC;
            }
        } 
        */
 
        public static CodeAccessPermission TransparentWindows { 
            get {
                if (transparentWindows == null) { 
                    transparentWindows = AllWindows;
                }
                return transparentWindows;
            } 
        }
 
        public static CodeAccessPermission TopLevelWindow { 
            get {
                if (topLevelWindow == null) { 
                    topLevelWindow = SafeTopLevelWindows;
                }
                return topLevelWindow;
            } 
        }
 
        /* Unused 
        public static CodeAccessPermission TopMostWindow {
            get { 
                if (topMostWindow == null) {
                    topMostWindow = AllWindows;
                }
                return topMostWindow; 
            }
        } 
        */ 

        public static CodeAccessPermission UnmanagedCode { 
            get {
                if (unmanagedCode == null) {
                    unmanagedCode = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
                } 
                return unmanagedCode;
            } 
        } 

        /* 
        public static CodeAccessPermission UnrestrictedEnvironment {
            get {
                if (unrestrictedEnvironment == null) {
                    unrestrictedEnvironment = new EnvironmentPermission(PermissionState.Unrestricted); 
                }
                return unrestrictedEnvironment; 
            } 
        }
        */ 

        public static CodeAccessPermission UnrestrictedWindows {
            get {
                if (unrestrictedWindows == null) { 
                    unrestrictedWindows = AllWindows;
                } 
                return unrestrictedWindows; 
            }
        } 

        /* FXCop avoid unused code
        public static CodeAccessPermission Win32HandleManipulation {
            get { 
                if (win32HandleManipulation == null) {
                    win32HandleManipulation = UnmanagedCode; 
                } 
                return win32HandleManipulation;
            } 
        }
        */

        public static CodeAccessPermission WindowAdornmentModification { 
            get {
                if (windowAdornmentModification == null) { 
                    windowAdornmentModification = AllWindows; 
                }
                return windowAdornmentModification; 
            }
        }

        /* unused 
        public static CodeAccessPermission AutoComplete {
            get { 
                if (autoComplete == null) { 
                    autoComplete = UnmanagedCode;
                } 
                return autoComplete;
            }
        }
        */ 

        [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;
        }
 
        /// SECREVIEW: ReviewImperativeSecurity
        ///   vulnerability to watch out for: A method uses imperative security and might be constructing the permission using state information or return values that can change while the demand is active. 
        ///   reason for exclude: fileName is a local variable and not subject to race conditions. 
        [SuppressMessage("Microsoft.Security", "CA2103:ReviewImperativeSecurity")]
        internal static void DemandFileIO(FileIOPermissionAccess access, string fileName) { 
            new FileIOPermission(access, UnsafeGetFullPath(fileName)).Demand();
        }
    }
} 


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

/* 
 */ 
namespace System.Windows.Forms {
 
    using System.Diagnostics;
    using System.Diagnostics.CodeAnalysis;
    using System;
    using System.IO; 
    using System.Security.Permissions;
    using System.Security; 
    using System.Drawing.Printing; 
    using System.Runtime.Versioning;
 
    internal static class IntSecurity {
        public static readonly TraceSwitch SecurityDemand = new TraceSwitch("SecurityDemand", "Trace when security demands occur.");
#if DEBUG
        public static readonly BooleanSwitch MapSafeTopLevelToSafeSub = new BooleanSwitch("MapSafeTopLevelToSafeSub", "Maps the SafeTopLevelWindow UI permission to SafeSubWindow permission. Must restart to take effect."); 
#endif
 
        private static CodeAccessPermission adjustCursorClip; 
        private static CodeAccessPermission affectMachineState;
        private static CodeAccessPermission affectThreadBehavior; 
        private static CodeAccessPermission allPrinting;
        private static PermissionSet        allPrintingAndUnmanagedCode; // Can't assert twice in the same method
        private static CodeAccessPermission allWindows;
        private static CodeAccessPermission clipboardRead; 
        private static CodeAccessPermission clipboardOwn;
        private static PermissionSet        clipboardWrite; // Can't assert twice in the same method 
        private static CodeAccessPermission changeWindowRegionForTopLevel; 
        private static CodeAccessPermission controlFromHandleOrLocation;
        private static CodeAccessPermission createAnyWindow; 
        private static CodeAccessPermission createGraphicsForControl;
        private static CodeAccessPermission defaultPrinting;
        private static CodeAccessPermission fileDialogCustomization;
        private static CodeAccessPermission fileDialogOpenFile; 
        private static CodeAccessPermission fileDialogSaveFile;
        private static CodeAccessPermission getCapture; 
        private static CodeAccessPermission getParent; 
        private static CodeAccessPermission manipulateWndProcAndHandles;
        private static CodeAccessPermission modifyCursor; 
        private static CodeAccessPermission modifyFocus;
        private static CodeAccessPermission objectFromWin32Handle;
        private static CodeAccessPermission safePrinting;
        private static CodeAccessPermission safeSubWindows; 
        private static CodeAccessPermission safeTopLevelWindows;
        private static CodeAccessPermission sendMessages; 
        private static CodeAccessPermission sensitiveSystemInformation; 
        private static CodeAccessPermission transparentWindows;
        private static CodeAccessPermission topLevelWindow; 
        private static CodeAccessPermission unmanagedCode;
        private static CodeAccessPermission unrestrictedWindows;
        private static CodeAccessPermission windowAdornmentModification;
 
        /* Unused permissions
        private static CodeAccessPermission win32HandleManipulation; 
        private static CodeAccessPermission minimizeWindowProgrammatically; 
        private static CodeAccessPermission restrictedWebBrowserPermission;
        private static CodeAccessPermission noPrinting; 
        private static CodeAccessPermission topMostWindow;
        private static CodeAccessPermission unrestrictedEnvironment;
        private static CodeAccessPermission autoComplete;
        private static CodeAccessPermission defaultWebBrowserPermission; 
        private static CodeAccessPermission screenDC;
        */ 
 
        //
        // Property accessors for permissions.  Don't allocate permissions up front -- always 
        // demand create them.  A great many codepaths never need all these permissions so it is wasteful to
        // create them.
        //
 

        public static CodeAccessPermission AdjustCursorClip { 
            get { 
                if (adjustCursorClip == null) {
                    adjustCursorClip = AllWindows; 
                }
                return adjustCursorClip;
            }
        } 

        public static CodeAccessPermission AdjustCursorPosition { 
            get { 
                return AllWindows;
            } 
        }

        public static CodeAccessPermission AffectMachineState {
            get { 
                if (affectMachineState == null) {
                    affectMachineState = UnmanagedCode; 
                } 
                return affectMachineState;
            } 
        }

        public static CodeAccessPermission AffectThreadBehavior {
            get { 
                if (affectThreadBehavior == null) {
                    affectThreadBehavior = UnmanagedCode; 
                } 
                return affectThreadBehavior;
            } 
        }

        public static CodeAccessPermission AllPrinting {
            get { 
                if (allPrinting == null) {
                    allPrinting = new PrintingPermission(PrintingPermissionLevel.AllPrinting); 
                } 
                return allPrinting;
            } 
        }

        public static PermissionSet AllPrintingAndUnmanagedCode { // Can't assert twice in the same method. See ASURT 52788.
            get { 
                if (allPrintingAndUnmanagedCode == null) {
                    PermissionSet temp = new PermissionSet(PermissionState.None); 
                    temp.SetPermission(IntSecurity.UnmanagedCode); 
                    temp.SetPermission(IntSecurity.AllPrinting);
                    allPrintingAndUnmanagedCode = temp; 
                }
                return allPrintingAndUnmanagedCode;
            }
        } 

        public static CodeAccessPermission AllWindows { 
            get { 
                if (allWindows == null) {
                    allWindows = new UIPermission(UIPermissionWindow.AllWindows); 
                }
                return allWindows;
            }
        } 

        public static CodeAccessPermission ClipboardRead { 
            get { 
                if (clipboardRead == null) {
                    clipboardRead = new UIPermission(UIPermissionClipboard.AllClipboard); 
                }
                return clipboardRead;
            }
        } 

        public static CodeAccessPermission ClipboardOwn { 
            get { 
                if (clipboardOwn == null) {
                    clipboardOwn = new UIPermission(UIPermissionClipboard.OwnClipboard); 
                }
                return clipboardOwn;
            }
        } 

        public static PermissionSet ClipboardWrite { // Can't assert OwnClipboard & UnmanagedCode in the same context, need permission set. 
            get { 
                if (clipboardWrite == null) {
                    clipboardWrite = new PermissionSet(PermissionState.None); 
                    clipboardWrite.SetPermission(IntSecurity.UnmanagedCode);
                    clipboardWrite.SetPermission(IntSecurity.ClipboardOwn);
                }
                return clipboardWrite; 
            }
        } 
 
        public static CodeAccessPermission ChangeWindowRegionForTopLevel {
            get { 
                if (changeWindowRegionForTopLevel == null) {
                    changeWindowRegionForTopLevel = AllWindows;
                }
                return changeWindowRegionForTopLevel; 
            }
        } 
 
        public static CodeAccessPermission ControlFromHandleOrLocation {
            get { 
                if (controlFromHandleOrLocation == null) {
                    controlFromHandleOrLocation = AllWindows;
                }
                return controlFromHandleOrLocation; 
            }
        } 
 
        public static CodeAccessPermission CreateAnyWindow {
            get { 
                if (createAnyWindow == null) {
                    createAnyWindow = SafeSubWindows;
                }
                return createAnyWindow; 
            }
        } 
 
        public static CodeAccessPermission CreateGraphicsForControl {
            get { 
                if (createGraphicsForControl == null) {
                    createGraphicsForControl = SafeSubWindows;
                }
                return createGraphicsForControl; 
            }
        } 
 
        public static CodeAccessPermission DefaultPrinting {
            get { 
                if (defaultPrinting == null) {
                    defaultPrinting = new PrintingPermission(PrintingPermissionLevel.DefaultPrinting);
                }
                return defaultPrinting; 
            }
        } 
 
        public static CodeAccessPermission FileDialogCustomization {
            get { 
                if (fileDialogCustomization == null) {
                    fileDialogCustomization = new FileIOPermission(PermissionState.Unrestricted);
                }
                return fileDialogCustomization; 
            }
        } 
 
        public static CodeAccessPermission FileDialogOpenFile {
            get { 
                if (fileDialogOpenFile == null) {
                    fileDialogOpenFile = new FileDialogPermission(FileDialogPermissionAccess.Open);
                }
                return fileDialogOpenFile; 
            }
        } 
 
        public static CodeAccessPermission FileDialogSaveFile {
            get { 
                if (fileDialogSaveFile == null) {
                    fileDialogSaveFile = new FileDialogPermission(FileDialogPermissionAccess.Save);
                }
                return fileDialogSaveFile; 
            }
        } 
 
        /* Unused
        public static CodeAccessPermission RestrictedWebBrowserPermission { 
            get {
                if (restrictedWebBrowserPermission == null) {
                    restrictedWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Restricted);
                } 
                return restrictedWebBrowserPermission;
            } 
        } 

        public static CodeAccessPermission DefaultWebBrowserPermission { 
            get {
                if (defaultWebBrowserPermission == null) {
                    defaultWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Default);
                } 
                return defaultWebBrowserPermission;
            } 
        } 
        */
 
        public static CodeAccessPermission GetCapture {
            get {
                if (getCapture == null) {
                    getCapture = AllWindows; 
                }
                return getCapture; 
            } 
        }
 
        public static CodeAccessPermission GetParent {
            get {
                if (getParent == null) {
                    getParent = AllWindows; 
                }
                return getParent; 
            } 
        }
 
        public static CodeAccessPermission ManipulateWndProcAndHandles {
            get {
                if (manipulateWndProcAndHandles == null) {
                    manipulateWndProcAndHandles = AllWindows; 
                }
                return manipulateWndProcAndHandles; 
            } 
        }
 
        /* Unused
        public static CodeAccessPermission MinimizeWindowProgrammatically {
            get {
                if (minimizeWindowProgrammatically == null) { 
                    minimizeWindowProgrammatically = AllWindows;
                } 
                return minimizeWindowProgrammatically; 
            }
        } 
        */

        public static CodeAccessPermission ModifyCursor {
            get { 
                if (modifyCursor == null) {
                    modifyCursor = SafeSubWindows; 
                } 
                return modifyCursor;
            } 
        }

        public static CodeAccessPermission ModifyFocus {
            get { 
                if (modifyFocus == null) {
                    modifyFocus = AllWindows; 
                } 
                return modifyFocus;
            } 
        }

        /* Unused
        public static CodeAccessPermission NoPrinting { 
            get {
                if (noPrinting == null) { 
                    noPrinting = new PrintingPermission(PrintingPermissionLevel.NoPrinting); 
                }
                return noPrinting; 
            }
        }
        */
 
        public static CodeAccessPermission ObjectFromWin32Handle {
            get { 
                if (objectFromWin32Handle == null) { 
                    objectFromWin32Handle = UnmanagedCode;
                } 
                return objectFromWin32Handle;
            }
        }
 
        public static CodeAccessPermission SafePrinting {
            get { 
                if (safePrinting == null) { 
                    safePrinting = new PrintingPermission(PrintingPermissionLevel.SafePrinting);
                } 
                return safePrinting;
            }
        }
 
        public static CodeAccessPermission SafeSubWindows {
            get { 
                if (safeSubWindows == null) { 
                    safeSubWindows = new UIPermission(UIPermissionWindow.SafeSubWindows);
                } 
                return safeSubWindows;
            }
        }
 
        public static CodeAccessPermission SafeTopLevelWindows {
            get { 
                if (safeTopLevelWindows == null) { 
                    safeTopLevelWindows = new UIPermission(UIPermissionWindow.SafeTopLevelWindows);
                } 
                return safeTopLevelWindows;
            }
        }
 
        public static CodeAccessPermission SendMessages {
            get { 
                if (sendMessages == null) { 
                    sendMessages = UnmanagedCode;
                } 
                return sendMessages;
            }
        }
 
        public static CodeAccessPermission SensitiveSystemInformation {
            get { 
                if (sensitiveSystemInformation == null) { 
                    sensitiveSystemInformation = new EnvironmentPermission(PermissionState.Unrestricted);
                } 
                return sensitiveSystemInformation;
            }
        }
 
        /* Unused
        public static CodeAccessPermission ScreenDC { 
            get { 
                if (screenDC == null) {
                    screenDC = AllWindows; 
                }
                return screenDC;
            }
        } 
        */
 
        public static CodeAccessPermission TransparentWindows { 
            get {
                if (transparentWindows == null) { 
                    transparentWindows = AllWindows;
                }
                return transparentWindows;
            } 
        }
 
        public static CodeAccessPermission TopLevelWindow { 
            get {
                if (topLevelWindow == null) { 
                    topLevelWindow = SafeTopLevelWindows;
                }
                return topLevelWindow;
            } 
        }
 
        /* Unused 
        public static CodeAccessPermission TopMostWindow {
            get { 
                if (topMostWindow == null) {
                    topMostWindow = AllWindows;
                }
                return topMostWindow; 
            }
        } 
        */ 

        public static CodeAccessPermission UnmanagedCode { 
            get {
                if (unmanagedCode == null) {
                    unmanagedCode = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
                } 
                return unmanagedCode;
            } 
        } 

        /* 
        public static CodeAccessPermission UnrestrictedEnvironment {
            get {
                if (unrestrictedEnvironment == null) {
                    unrestrictedEnvironment = new EnvironmentPermission(PermissionState.Unrestricted); 
                }
                return unrestrictedEnvironment; 
            } 
        }
        */ 

        public static CodeAccessPermission UnrestrictedWindows {
            get {
                if (unrestrictedWindows == null) { 
                    unrestrictedWindows = AllWindows;
                } 
                return unrestrictedWindows; 
            }
        } 

        /* FXCop avoid unused code
        public static CodeAccessPermission Win32HandleManipulation {
            get { 
                if (win32HandleManipulation == null) {
                    win32HandleManipulation = UnmanagedCode; 
                } 
                return win32HandleManipulation;
            } 
        }
        */

        public static CodeAccessPermission WindowAdornmentModification { 
            get {
                if (windowAdornmentModification == null) { 
                    windowAdornmentModification = AllWindows; 
                }
                return windowAdornmentModification; 
            }
        }

        /* unused 
        public static CodeAccessPermission AutoComplete {
            get { 
                if (autoComplete == null) { 
                    autoComplete = UnmanagedCode;
                } 
                return autoComplete;
            }
        }
        */ 

        [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;
        }
 
        /// SECREVIEW: ReviewImperativeSecurity
        ///   vulnerability to watch out for: A method uses imperative security and might be constructing the permission using state information or return values that can change while the demand is active. 
        ///   reason for exclude: fileName is a local variable and not subject to race conditions. 
        [SuppressMessage("Microsoft.Security", "CA2103:ReviewImperativeSecurity")]
        internal static void DemandFileIO(FileIOPermissionAccess access, string fileName) { 
            new FileIOPermission(access, UnsafeGetFullPath(fileName)).Demand();
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK