You shouldn't use "unsupported" stuff like Win32Security.dll, use the
System.DirectoryServices (XP and higher) or System.Management namespace
instead.
Next is a complete example illustrating how to dump the ACE's from a File
object DACL using System.Management classes.
using System;
using System.Management;
using System.Collections;
// Access mask (see AccessMask property)
[Flags]
enum Mask : uint
{
FileReadData = 0x00000001,
FileWriteData = 0x00000002,
FileAppendData = 0x00000004,
FileReadEA = 0x00000008,
FileWriteEA = 0x00000010,
FileExecute = 0x00000020,
FileDeleteChild = 0x00000040,
FileReadAttributes = 0x00000080,
FileWriteAttributes= 0x00000100,
Delete = 0x00010000,
ReadControl = 0x00020000,
WriteDac = 0x00040000,
WriteOwner = 0x00080000,
Synchronize = 0x00100000,
AccessSystemSecurity = 0x01000000,
MaximumAllowed = 0x02000000,
GenericAll = 0x10000000,
GenericExecute= 0x20000000,
GenericWrite = 0x40000000,
GenericRead = 0x80000000
}
[Flags]
enum AceFlags : int
{
ObjectInheritAce = 1,
ContainerInheritAce = 2,
NoPropagateInheritAce = 4,
InheritOnlyAce = 8,
InheritedAce = 16
}
[Flags]
enum AceType : int
{
AccessAllowed = 0,
AccessDenied = 1,
Audit = 2
}
class Tester {
public static void Main() {
string fileObject = @"c:\\pipo\\t.txt"; // Watch the double Backslashes
using(ManagementObject lfs = new
ManagementObject(@"Win32_LogicalFileSecuritySettin g.Path=" + "'" +
fileObject + "'"))
{
// Get the security descriptor for this object
// Dump all trustees (this includes owner)
ManagementBaseObject outParams =
lfs.InvokeMethod("GetSecurityDescriptor", null, null);
if (((uint)(outParams.Properties["ReturnValue"].Value)) == 0) // if
success
{
ManagementBaseObject secDescriptor =
((ManagementBaseObject)(outParams.Properties["Descriptor"].Value));
//The DACL is an array of Win32_ACE objects.
ManagementBaseObject[] dacl =
((ManagementBaseObject[])(secDescriptor.Properties["Dacl"].Value));
DumpACEs(dacl);
}
}
}
static void DumpACEs(ManagementBaseObject[] dacl)
{
foreach(ManagementBaseObject mbo in dacl){
Console.WriteLine("\n---------\nMask: {0:X} - Flags: {1} - Type: {2}",
mbo["AccessMask"], mbo["AceFlags"], mbo["AceType"]);
// Access allowed/denied ACE
if(Convert.ToInt32(mbo["AceType"]) == (int)AceType.AccessDenied)
Console.WriteLine("DENIED ACE TYPE");
else
Console.WriteLine("ALLOWED ACE TYPE");
// Dump trustees
ManagementBaseObject Trustee = ((ManagementBaseObject)(mbo["Trustee"]));
Console.WriteLine("Name: {0} - Domain: {1} - SID {2}\n",
Trustee.Properties["Name"].Value,
Trustee.Properties["Domain"].Value,
Trustee.Properties["SIDString"].Value);
// Dump ACE mask in readable form
UInt32 mask = (UInt32)mbo["AccessMask"];
Console.WriteLine(Enum.Format(typeof(Mask), mask, "g"));
}
}
}
Willy.
"Aleborg" <an****@aleborg.se> wrote in message
news:D5**********************************@microsof t.com...
I use this code to set writepermissions on a folder/file with
Win32Security.DLL:
SecurityDescriptor secDesc = SecurityDescriptor.GetFileSecurity (@strFile,
SECURITY_INFORMATION.DACL_SECURITY_INFORMATION);
Dacl dacl = secDesc.Dacl;
dacl.AddAce (new AceAccessAllowed (new Sid (user),
AccessType.GENERIC_EXECUTE | AccessType.GENERIC_READ |
AccessType.GENERIC_WRITE | AccessType.DELETE,
AceFlags.CONTAINER_INHERIT_ACE | AceFlags.OBJECT_INHERIT_ACE));
secDesc.SetDacl(dacl);
secDesc.SetFileSecurity(@strFile,
SECURITY_INFORMATION.DACL_SECURITY_INFORMATION);
But how do I get the ACL for a user? I need to know if a user has the
permissions as stated in the code above on a file/folder.
