Solved

Programmatically find the computer SID with C# and CPP

Posted on 2009-04-01
2
2,833 Views
Last Modified: 2012-05-06
In need 2 routines, one in cpp and the other in C#. The code shows the cpp code to get the SID for the computer. I think this is correct, I have been using it for awhile. Then I need to be able to do the same thing in C#. Neither program will have administrative rights.

When I run these 2 code snipits on a computer on a domain I get the domain SID for the computer. I can verify this with ADSIViewer. Same results for both! Good, half way there.

If I then move the code to a machine that is not on a domain the CPP code will return a SID. But the .net C# code always throws no matter what computer name I give it.

This can't be that hard. So if someone has some ideas....


Scott
//
//	Get the size of the buffers
//
  cbSid        = 0;
  cbDomainName = 0;
  Sid          = NULL;
  LookupAccountName( NULL, szAccount, Sid, &cbSid, pszDomainName, &cbDomainName,  &eUse );
//
//	Now get the actual SID
//	
  Sid           = (PSID)  malloc(cbSid);
   pszDomainName = (LPSTR) malloc(cbDomainName);
 
   bRC = LookupAccountName( NULL, szAccount, Sid, &cbSid, pszDomainName   , &cbDomainName, &eUse ); 
  if( bRC )
  {
    strcpy_s( m_szDomainName, sizeof(m_szDomainName), pszDomainName );   	
    bRC = ConvertSidToStringSid( Sid, &pszSid ); 
    if( bRC )
   {
     sprintf_s( szWork, sizeof(szWork), "       FQDN : %s\\%s   - SID_NAME_USE: %li",     m_szDomainName,  m_szComputerName, eUse);
  printf( "%s\r\n", szWork ); 			
  strcpy_s( m_szMachineSID, sizeof(m_szMachineSID), pszSid );
  printf( "  MachineSID: %s\r\n", m_szMachineSID );    			
  if (pszSid)	LocalFree( pszSid );
 }
 }
 
==================================  C#  ===============================
	String sSid;
	SecurityIdentifier sid, sid2;
	NTAccount nta, acct;
	try
	{
		nta = new NTAccount( "SNORBERG-T5400$" );	
	
		sid = (SecurityIdentifier) nta.Translate( typeof(SecurityIdentifier));
		sSid = m_Config.MachineSID;
		sid2 = new SecurityIdentifier( sSid + "-513");
	
		acct = (NTAccount)sid.Translate(typeof(NTAccount));	
		acct = (NTAccount)sid2.Translate(typeof(NTAccount));
	}
	catch( Exception ex )
	{
		MessageBox.Show( ex.Message );
	}

Open in new window

0
Comment
Question by:snorberg
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Accepted Solution

by:
snorberg earned 0 total points
ID: 24049461
It seems that the only way this can be done from .net code is by using the win32 api commands through the runtime.interopServices.
http://www.pinvoke.net/default.aspx/advapi32.LookupAccountName
The pinvoke site has a reasonable example.
 
0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Extention Methods in C# 3.0 by Ivo Stoykov C# 3.0 offers extension methods. They allow extending existing classes without changing the class's source code or relying on inheritance. These are static methods invoked as instance method. This…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question