public override ApplicationTrust DetermineApplicationTrust(Evidence applicationEvidence, Evidence activatorEvidence, TrustManagerContext context)
{
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordPerf | EventTrace.Keyword.KeywordHosting, EventTrace.Level.Verbose, EventTrace.Event.WpfHost_DetermineApplicationTrustStart);
Uri uriFromActivationData = this.GetUriFromActivationData(0);
bool flag = PresentationAppDomainManager.IsDebug || this.GetBoolFromActivationData(1);
BrowserInteropHelper.SetBrowserHosted(true);
ApplicationTrust applicationTrust;
if (flag)
{
context.IgnorePersistedDecision = true;
context.Persist = false;
context.KeepAlive = false;
context.NoPrompt = true;
applicationTrust = base.DetermineApplicationTrust(applicationEvidence, activatorEvidence, context);
}
else
{
Zone hostEvidence = applicationEvidence.GetHostEvidence <Zone>();
context.NoPrompt = (hostEvidence.SecurityZone != SecurityZone.Intranet && hostEvidence.SecurityZone != SecurityZone.Trusted);
bool flag2 = !context.NoPrompt && PresentationHostSecurityManager.ElevationPromptOwnerWindow != IntPtr.Zero;
if (flag2)
{
IntPtr ancestor = UnsafeNativeMethods.GetAncestor(new HandleRef(null, PresentationHostSecurityManager.ElevationPromptOwnerWindow), 2);
PresentationHostSecurityManager.SetFakeActiveWindow(ancestor);
PresentationHostSecurityManager.ElevationPromptOwnerWindow = IntPtr.Zero;
}
try
{
applicationTrust = base.DetermineApplicationTrust(applicationEvidence, activatorEvidence, context);
}
finally
{
if (flag2)
{
PresentationHostSecurityManager.SetFakeActiveWindow((IntPtr)0);
}
}
}
if (applicationTrust != null)
{
PermissionSet permissionSet = applicationTrust.DefaultGrantSet.PermissionSet;
if (flag)
{
Uri uriFromActivationData2 = this.GetUriFromActivationData(2);
if (uriFromActivationData2 != null)
{
permissionSet = PresentationHostSecurityManager.AddPermissionForUri(permissionSet, uriFromActivationData2);
}
}
if (permissionSet is ReadOnlyPermissionSet)
{
permissionSet = new PermissionSet(permissionSet);
}
applicationTrust.DefaultGrantSet.PermissionSet = permissionSet;
}
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordPerf | EventTrace.Keyword.KeywordHosting, EventTrace.Level.Verbose, EventTrace.Event.WpfHost_DetermineApplicationTrustEnd);
return(applicationTrust);
}
private ApplicationProxyInternal CreateAppDomainForLooseXaml(Uri uri)
{
PermissionSet permissionSet = new PermissionSet(null);
permissionSet.AddPermission(new FileDialogPermission(FileDialogPermissionAccess.Open));
permissionSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));
permissionSet.AddPermission(new UIPermission(UIPermissionWindow.SafeTopLevelWindows));
permissionSet.AddPermission(new UIPermission(UIPermissionClipboard.OwnClipboard));
permissionSet.AddPermission(SystemDrawingHelper.NewSafePrintingPermission());
permissionSet.AddPermission(new MediaPermission(MediaPermissionAudio.SafeAudio, MediaPermissionVideo.SafeVideo, MediaPermissionImage.SafeImage));
permissionSet.AddPermission(new WebBrowserPermission(WebBrowserPermissionLevel.Safe));
permissionSet = PresentationHostSecurityManager.AddPermissionForUri(permissionSet, uri);
string text = "XamlViewer";
string moduleFileName = UnsafeNativeMethods.GetModuleFileName(new HandleRef(null, UnsafeNativeMethods.GetModuleHandle("PresentationHost_v0400.dll")));
string appBasePath = Path.GetDirectoryName(moduleFileName) + "\\" + text;
return(this.CreateAppDomainAndAppProxy(text, appBasePath, permissionSet));
}