Solved

Get host sid

Posted on 2011-03-11
2
398 Views
Last Modified: 2013-12-04
Hi,

I know that each windows machine have unique id (sid)
How to get that sid from host name or ip address.

0
Comment
Question by:lavitz
[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
 
LVL 10

Expert Comment

by:aboo_s
ID: 35111966
What do you mean, phisical address (MAC address)?

0
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 35112663
You can just use 'LookupAccountName()' (http://msdn.microsoft.com/en-us/library/aa379159(VS.85).aspx) with the machine name:
#define _WIN32_WINNT 0x0501
#define WINVER 0x0501 // both combied stand for Windows XP
#include <windows.h>
#include <sddl.h>
#include <stdio.h>
#pragma comment(lib,"advapi32.lib")

BOOL
GetAccountSid(
    LPTSTR SystemName,
    LPTSTR AccountName,
    PSID *Sid
    )
{
    LPTSTR ReferencedDomain=NULL;
    DWORD cbSid=128;    // initial allocation attempt
    DWORD cchReferencedDomain=16; // initial allocation size
    SID_NAME_USE peUse;
    BOOL bSuccess=FALSE; // assume this function will fail

    __try {

    //
    // initial memory allocations
    //
    *Sid = (PSID)HeapAlloc(GetProcessHeap(), 0, cbSid);

    if(*Sid == NULL) __leave;

    ReferencedDomain = (LPTSTR)HeapAlloc(
                    GetProcessHeap(),
                    0,
                    cchReferencedDomain * sizeof(TCHAR)
                    );

    if(ReferencedDomain == NULL) __leave;

    //
    // Obtain the SID of the specified account on the specified system.
    //
    while(!LookupAccountName(
                    SystemName,         // machine to lookup account on
                    AccountName,        // account to lookup
                    *Sid,               // SID of interest
                    &cbSid,             // size of SID
                    ReferencedDomain,   // domain account was found on
                    &cchReferencedDomain,
                    &peUse
                    )) {
        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
            //
            // reallocate memory
            //
            *Sid = (PSID)HeapReAlloc(
                        GetProcessHeap(),
                        0,
                        *Sid,
                        cbSid
                        );
            if(*Sid == NULL) __leave;

            ReferencedDomain = (LPTSTR)HeapReAlloc(
                        GetProcessHeap(),
                        0,
                        ReferencedDomain,
                        cchReferencedDomain * sizeof(TCHAR)
                        );
            if(ReferencedDomain == NULL) __leave;
        }
        else __leave;
    }

    //
    // Indicate success.
    //
    bSuccess = TRUE;

    } // try
    __finally {

    //
    // Cleanup and indicate failure, if appropriate.
    //

    HeapFree(GetProcessHeap(), 0, ReferencedDomain);

    if(!bSuccess) {
        if(*Sid != NULL) {
            HeapFree(GetProcessHeap(), 0, *Sid);
            *Sid = NULL;
        }
    }

    } // finally

    return bSuccess;
}

int main ()
{
  char acMachine[MAX_PATH];
  DWORD dwSize = MAX_PATH;
  char* pStringSID;
  PSID psid;

  GetComputerName(acMachine,&dwSize);

  printf("%s\n",acMachine);

  if (!GetAccountSid(NULL,acMachine,&psid)) { printf("No SID\n"); exit(-1);}

  if (!ConvertSidToStringSid(psid,&pStringSID)) { printf("No string\n"); exit(-2);}

  printf("%s\n",pStringSID);

  LocalFree(psid);

  LocalFree(pStringSID);

  return 0;
}

Open in new window

0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

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

This article shows how to make a Windows 7 gadget that accepts files dropped from the Windows Explorer.  It also illustrates how to give your gadget a non-rectangular shape and how to add some nifty visual effects to text displayed in a your gadget.…
This article surveys and compares options for encoding and decoding base64 data.  It includes source code in C++ as well as examples of how to use standard Windows API functions for these tasks. We'll look at the algorithms — how encoding and decodi…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

628 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