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lsaenumerateaccountrights (advapi32)
 
.
Summary
Enumerates the privileges assigned to a Windows account

C# Signature:

[DllImport("advapi32.dll", SetLastError=true)]
public static extern uint LsaEnumerateAccountRights(
    IntPtr PolicyHandle,
    [MarshalAs(UnmanagedType.LPArray)] byte[] AccountSid,
    out IntPtr UserRights,
    out uint CountOfRights
    );

VB Signature:

Declare Function LsaEnumerateAccountRights Lib "advapi32.dll" (TODO) As TODO

User-Defined Types:

None.

Notes:

// NTSTATUS LsaEnumerateAccountRights(

// in LSA_HANDLE PolicyHandle,

// in PSID AccountSid,

// out PLSA_UNICODE_STRING* UserRights,

// out PULONG CountOfRights

//);

NTSTATUS can be converted to a Windows error using LsaNtStatusToWinError

The reason behind using byte[] for a sid is a mystery to me. Has anyone documented this? I've just copied the techniques from other functions here and it seems to work.

Similarly - the sample code below works, but why can't you just use an array of LSA_UNICODE_STRING ???

(Answer: Nobody knows why, but the runtime seems to screw it up)

Tips & Tricks:

Please add some!

Sample Code (C#):

// You should already have the HPolicy and SID ready
IntPtr rightsPtr;
uint countOfRights;
LsaEnumerateAccountRights(HPolicy, SID, out rightsPtr, out countOfRights);
try
{
    IntPtr ptr = rightsPtr;
    for (Int32 i = 0; i < countOfRights; i++)
    {
    LSA_UNICODE_STRING_withPointer structure = new LSA_UNICODE_STRING_withPointer();
    Marshal.PtrToStructure(ptr, structure);

    char[] destination = new char[structure.length / sizeof(char)];
    Marshal.Copy(structure.pwstr, destination, 0, destination.Length);

    string userRightStr = new string(destination, 0, destination.Length);

    Console.WriteLine("Another Privilege found: " + userRightStr);

    ptr = (IntPtr)(((long)ptr) + Marshal.SizeOf(typeof(LSA_UNICODE_STRING)));
    }
}
finally
{
    LsaFreeMemory(rightsPtr);
}

Alternative Managed API:

Do you know one? Please contribute it!

Documentation

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/security/security/lsaenumerateaccountrights.asp

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