private static bool CheckPermissionsInWindows(INopFileProvider fileProvider, string path, bool checkRead, bool checkWrite, bool checkModify, bool checkDelete)
{
var permissionsAreGranted = true;
try
{
if (!(fileProvider.FileExists(path) || fileProvider.DirectoryExists(path)))
{
return(true);
}
var current = WindowsIdentity.GetCurrent();
var readIsDeny = false;
var writeIsDeny = false;
var modifyIsDeny = false;
var deleteIsDeny = false;
var readIsAllow = false;
var writeIsAllow = false;
var modifyIsAllow = false;
var deleteIsAllow = false;
var rules = fileProvider.GetAccessControl(path).GetAccessRules(true, true, typeof(SecurityIdentifier))
.Cast <FileSystemAccessRule>()
.ToList();
foreach (var rule in rules.Where(rule => current.User?.Equals(rule.IdentityReference) ?? false))
{
CheckAccessRule(rule, ref deleteIsDeny, ref modifyIsDeny, ref readIsDeny, ref writeIsDeny, ref deleteIsAllow, ref modifyIsAllow, ref readIsAllow, ref writeIsAllow);
}
if (current.Groups != null)
{
foreach (var reference in current.Groups)
{
foreach (var rule in rules.Where(rule => reference.Equals(rule.IdentityReference)))
{
CheckAccessRule(rule, ref deleteIsDeny, ref modifyIsDeny, ref readIsDeny, ref writeIsDeny, ref deleteIsAllow, ref modifyIsAllow, ref readIsAllow, ref writeIsAllow);
}
}
}
deleteIsAllow = !deleteIsDeny && deleteIsAllow;
modifyIsAllow = !modifyIsDeny && modifyIsAllow;
readIsAllow = !readIsDeny && readIsAllow;
writeIsAllow = !writeIsDeny && writeIsAllow;
if (checkRead)
{
permissionsAreGranted = readIsAllow;
}
if (checkWrite)
{
permissionsAreGranted = permissionsAreGranted && writeIsAllow;
}
if (checkModify)
{
permissionsAreGranted = permissionsAreGranted && modifyIsAllow;
}
if (checkDelete)
{
permissionsAreGranted = permissionsAreGranted && deleteIsAllow;
}
}
catch (IOException)
{
return(false);
}
catch
{
return(true);
}
return(permissionsAreGranted);
}