Get User SID using code

[mbjunior99]

I'm trying to get the user SID through code. I have got some VB 6 code to do this but cannot seem to get it to work in .NET. Anyone already got this working?

[sixfeetsix]

You'll have to do some translation :

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Security.Principal;

    public class UserSid
    {
        [DllImport("advapi32", CharSet=CharSet.Auto, SetLastError=true)]
        static extern bool LookupAccountSid
        (
            string lpSystemName,
            IntPtr pSid,
            StringBuilder Account,
            ref int cbName,
            StringBuilder DomainName,
            ref int cbDomainName,
            ref int peUse
        );

        [DllImport("advapi32", CharSet=CharSet.Auto)] 
        static extern bool GetTokenInformation
        (
            IntPtr TokenHandle, 
            TOKEN_INFORMATION_CLASS TokenInformationClass, 
            IntPtr TokenInformation, 
            int TokenInformationLength, 
            ref int ReturnLength 
        ); 

        [DllImport("advapi32", CharSet=CharSet.Auto)] 
        static extern bool ConvertSidToStringSid
        (
            IntPtr psid, 
            [In, Out, MarshalAs(UnmanagedType.LPTStr)] ref string pStringSid
        );  

        public struct SID_AND_ATTRIBUTES 
        { 
            public IntPtr Sid; 
            public int Attributes; 
        } 

        public struct TOKEN_USER 
        { 
            public SID_AND_ATTRIBUTES User; 
        } 

        public enum TOKEN_INFORMATION_CLASS 
        { 
            TokenUser = 1, 
            TokenGroups, 
            TokenPrivileges, 
            TokenOwner, 
            TokenPrimaryGroup, 
            TokenDefaultDacl, 
            TokenSource, 
            TokenType, 
            TokenImpersonationLevel, 
            TokenStatistics, 
            TokenRestrictedSids, 
            TokenSessionId, 
            TokenGroupsAndPrivileges, 
            TokenSessionReference, 
            TokenSandBoxInert, 
            TokenAuditPolicy, 
            TokenOrigin 
        } 

        public string GetUserSid(System.IntPtr userToken)
        {
            TOKEN_USER TokenUser; 
            int TokenInfLength = 0 ; 
            string sUserSid = "";

            GetTokenInformation(userToken, 
                TOKEN_INFORMATION_CLASS.TokenUser,
                IntPtr.Zero,
                TokenInfLength,
                ref TokenInfLength); 

            IntPtr TokenInformation = Marshal.AllocHGlobal(TokenInfLength ); 

            GetTokenInformation(userToken, 
                TOKEN_INFORMATION_CLASS.TokenUser, 
                TokenInformation, 
                TokenInfLength,
                ref TokenInfLength);

            TokenUser = (TOKEN_USER)Marshal.PtrToStructure(TokenInformation, 
                                                           typeof(TOKEN_USER)); 

            ConvertSidToStringSid(TokenUser.User.Sid, ref sUserSid);

            return sUserSid;
        }
    }

Here is how I get my sid using the class above :

using System.Security.Principal;

	MessageBox.Show(myUserSid.GetUserSid(WindowsIdentity.GetCurrent().Token));

Good luck !

[mbjunior99]

I have no idea how to convert to VB .NET. Anyone handy in both languages that is willing to help????

[sixfeetsix]

Imports System
Imports System.Runtime.InteropServices
Imports System.Text
Imports System.Security.Principal
 
Public Class UserSid
 
    Declare Auto Function GetTokenInformation _
        Lib "advapi32" ( _
        ByVal TokenHandle As IntPtr, _
        ByVal TokenInformationClass As TOKEN_INFORMATION_CLASS, _
        ByVal TokenInformation As IntPtr, _
        ByVal TokenInformationLength As Int32, _
        ByRef ReturnLength As Int32 _
    ) As Boolean
 
    Declare Auto Function ConvertSidToStringSid _
        Lib "advapi32" ( _
        ByVal psid As IntPtr, _
        <InAttribute(), OutAttribute(), MarshalAs(UnmanagedType.LPTStr)> _
        ByRef pStringSid As String _
    ) As Boolean
 
    Public Structure SID_AND_ATTRIBUTES
        Public Sid As IntPtr
        Public Attributes As Int32
    End Structure
 
    Public Structure TOKEN_USER
        Public User As SID_AND_ATTRIBUTES
    End Structure
 
    Public Enum TOKEN_INFORMATION_CLASS
        TokenUser = 1
        TokenGroups
        TokenPrivileges
        TokenOwner
        TokenPrimaryGroup
        TokenDefaultDacl
        TokenSource
        TokenType
        TokenImpersonationLevel
        TokenStatistics
        TokenRestrictedSids
        TokenSessionId
        TokenGroupsAndPrivileges
        TokenSessionReference
        TokenSandBoxInert
        TokenAuditPolicy
        TokenOrigin
    End Enum
 
    Public Function GetUserSid(ByVal userToken As IntPtr) As String
 
        Dim TokenUser As TOKEN_USER
        Dim TokenInfLength As Integer = 0
        Dim sUserSid As String = ""
        Dim TokenInformation As IntPtr
 
        GetTokenInformation(userToken, _
                            TOKEN_INFORMATION_CLASS.TokenUser, _
                            IntPtr.Zero, _
                            TokenInfLength, _
                            TokenInfLength)
 
        TokenInformation = Marshal.AllocHGlobal(TokenInfLength)
 
        GetTokenInformation(userToken, _
                            TOKEN_INFORMATION_CLASS.TokenUser, _
                            TokenInformation, _
                            TokenInfLength, _
                            TokenInfLength)
 
        TokenUser = DirectCast(Marshal.PtrToStructure( _
                                    TokenInformation, _
                                    TokenUser.GetType), TOKEN_USER)
 
        ConvertSidToStringSid(TokenUser.User.Sid, sUserSid)
 
        Return sUserSid
 
    End Function
 
End Class

Imports System.Security.Principal
 
        Dim myUserSid As New UserSid
 
        MessageBox.Show(myUserSid.GetUserSid(WindowsIdentity.GetCurrent().Token))

[mbjunior99]

Thanks heaps sixfeetsix. Awesome !!

[guayo]

How can I use the same code to get a different user's SID, rather than the current loged in user.

I was thinking of using a listview to display the windows users, and when you clicked on the user, the selected user's SID will show.

Can anyone show me how to do that?