Solved

Programmatically find the computer SID with C# and CPP

Posted on 2009-04-01
2
2,768 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
2 Comments
 
LVL 21

Expert Comment

by:MogalManic
Comment Utility
0
 

Accepted Solution

by:
snorberg earned 0 total points
Comment Utility
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

What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

Article by: Ivo
C# And Nullable Types Since 2.0 C# has Nullable(T) Generic Structure. The idea behind is to allow value type objects to have null values just like reference types have. This concerns scenarios where not all data sources have values (like a databa…
Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

743 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

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now