从SID获取非Windows 2000以前版本的组名

using System;
using System.Runtime.InteropServices;

class Program
{
    [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern bool LookupAccountSid(
        string lpSystemName,
        IntPtr Sid,
        System.Text.StringBuilder lpName,
        ref uint cchName,
        System.Text.StringBuilder ReferencedDomainName,
        ref uint cchReferencedDomainName,
        out SID_NAME_USE peUse);

    [StructLayout(LayoutKind.Sequential)]
    public struct SID
    {
        public byte Revision;
        public byte SubAuthorityCount;
        public SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
        // public IntPtr SubAuthority; // Variable length
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct SID_IDENTIFIER_AUTHORITY
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6, ArraySubType = UnmanagedType.I1)]
        public byte[] Value;
    }

    public enum SID_NAME_USE
    {
        SidTypeUser = 1,
        SidTypeGroup,
        SidTypeDomain,
        SidTypeAlias,
        SidTypeWellKnownGroup,
        SidTypeDeletedAccount,
        SidTypeInvalid,
        SidTypeUnknown,
        SidTypeComputer
    }

    static void Main(string[] args)
    {
        string sidString = "SID字符串"; // 替换为实际的SID字符串

        IntPtr sidPtr = IntPtr.Zero;
        if (ConvertStringSidToSid(sidString, out sidPtr))
        {
            uint nameLength = 0;
            uint domainLength = 0;
            SID_NAME_USE sidType;
            LookupAccountSid(null, sidPtr, null, ref nameLength, null, ref domainLength, out sidType);

            System.Text.StringBuilder nameBuffer = new System.Text.StringBuilder((int)nameLength);
            System.Text.StringBuilder domainBuffer = new System.Text.StringBuilder((int)domainLength);

            if (LookupAccountSid(null, sidPtr, nameBuffer, ref nameLength, domainBuffer, ref domainLength, out sidType))
            {
                string groupName = domainBuffer.ToString() + "\\" + nameBuffer.ToString();
                Console.WriteLine("组名：" + groupName);
            }
            else
            {
                Console.WriteLine("无法获取组名。");
            }

            LocalFree(sidPtr);
        }
        else
        {
            Console.WriteLine("无效的SID字符串。");
        }
    }

    [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern bool ConvertStringSidToSid(
        string StringSid,
        out IntPtr Sid);

    [DllImport("kernel32.dll")]
    public static extern IntPtr LocalFree(IntPtr hMem);
}