C++ AllocateAndInitializeSid函数代码示例

static BOOL is_process_limited(void)
{
    static BOOL (WINAPI *pCheckTokenMembership)(HANDLE,PSID,PBOOL) = NULL;
    static BOOL (WINAPI *pOpenProcessToken)(HANDLE, DWORD, PHANDLE) = NULL;
    SID_IDENTIFIER_AUTHORITY NtAuthority = {SECURITY_NT_AUTHORITY};
    PSID Group;
    BOOL IsInGroup;
    HANDLE token;

    if (!pOpenProcessToken)
    {
        HMODULE hadvapi32 = GetModuleHandleA("advapi32.dll");
        pOpenProcessToken = (void*)GetProcAddress(hadvapi32, "OpenProcessToken");
        pCheckTokenMembership = (void*)GetProcAddress(hadvapi32, "CheckTokenMembership");
        if (!pCheckTokenMembership || !pOpenProcessToken)
        {
            /* Win9x (power to the masses) or NT4 (no way to know) */
            trace("missing pOpenProcessToken or CheckTokenMembership\n");
            return FALSE;
        }
    }

    if (!AllocateAndInitializeSid(&NtAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID,
                                  DOMAIN_ALIAS_RID_ADMINS,
                                  0, 0, 0, 0, 0, 0, &Group) ||
        !pCheckTokenMembership(NULL, Group, &IsInGroup))
    {
        trace("Could not check if the current user is an administrator\n");
        return FALSE;
    }
    if (!IsInGroup)
    {
        if (!AllocateAndInitializeSid(&NtAuthority, 2,
                                      SECURITY_BUILTIN_DOMAIN_RID,
                                      DOMAIN_ALIAS_RID_POWER_USERS,
                                      0, 0, 0, 0, 0, 0, &Group) ||
            !pCheckTokenMembership(NULL, Group, &IsInGroup))
        {
            trace("Could not check if the current user is a power user\n");
            return FALSE;
        }
        if (!IsInGroup)
        {
            /* Only administrators and power users can be powerful */
            return TRUE;
        }
    }

    if (pOpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token))
    {
        BOOL ret;
        TOKEN_ELEVATION_TYPE type = TokenElevationTypeDefault;
        DWORD size;

        ret = GetTokenInformation(token, TokenElevationType, &type, sizeof(type), &size);
        CloseHandle(token);
        return (ret && type == TokenElevationTypeLimited);
    }
    return FALSE;
}

static void
init() {
	// create security attributes for the pipe
	// http://msdn.microsoft.com/en-us/library/windows/desktop/hh448449(v=vs.85).aspx
	// define new Win 8 app related constants
	memset(&g_explicitAccesses, 0, sizeof(g_explicitAccesses));
	// Create a well-known SID for the Everyone group.
	// FIXME: we should limit the access to current user only
	// See this article for details: https://msdn.microsoft.com/en-us/library/windows/desktop/hh448493(v=vs.85).aspx

	SID_IDENTIFIER_AUTHORITY worldSidAuthority = {SECURITY_WORLD_SID_AUTHORITY};
	AllocateAndInitializeSid(&worldSidAuthority, 1,
		SECURITY_WORLD_RID, 0, 0, 0, 0, 0, 0, 0, &g_everyoneSID);

	// https://services.land.vic.gov.au/ArcGIS10.1/edESRIArcGIS10_01_01_3143/Python/pywin32/PLATLIB/win32/Demos/security/explicit_entries.py

	g_explicitAccesses[0].grfAccessPermissions = GENERIC_ALL;
	g_explicitAccesses[0].grfAccessMode = SET_ACCESS;
	g_explicitAccesses[0].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
	g_explicitAccesses[0].Trustee.pMultipleTrustee = NULL;
	g_explicitAccesses[0].Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
	g_explicitAccesses[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
	g_explicitAccesses[0].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
	g_explicitAccesses[0].Trustee.ptstrName = (LPTSTR)g_everyoneSID;

	// FIXME: will this work under Windows 7 and Vista?
	// create SID for app containers
	SID_IDENTIFIER_AUTHORITY appPackageAuthority = {SECURITY_APP_PACKAGE_AUTHORITY};
	AllocateAndInitializeSid(&appPackageAuthority,
		SECURITY_BUILTIN_APP_PACKAGE_RID_COUNT,
		SECURITY_APP_PACKAGE_BASE_RID,
		SECURITY_BUILTIN_PACKAGE_ANY_PACKAGE,
		0, 0, 0, 0, 0, 0, &g_allAppsSID);

	g_explicitAccesses[1].grfAccessPermissions = GENERIC_ALL;
	g_explicitAccesses[1].grfAccessMode = SET_ACCESS;
	g_explicitAccesses[1].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
	g_explicitAccesses[1].Trustee.pMultipleTrustee = NULL;
	g_explicitAccesses[1].Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
	g_explicitAccesses[1].Trustee.TrusteeForm = TRUSTEE_IS_SID;
	g_explicitAccesses[1].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
	g_explicitAccesses[1].Trustee.ptstrName = (LPTSTR)g_allAppsSID;

	// create DACL
	DWORD err = SetEntriesInAcl(2, g_explicitAccesses, NULL, &g_acl);
	if (0 == err) {
		// security descriptor
		g_securittyDescriptor = (PSECURITY_DESCRIPTOR)LocalAlloc(LPTR, SECURITY_DESCRIPTOR_MIN_LENGTH);
		InitializeSecurityDescriptor(g_securittyDescriptor, SECURITY_DESCRIPTOR_REVISION);

		// Add the ACL to the security descriptor. 
		SetSecurityDescriptorDacl(g_securittyDescriptor, TRUE, g_acl, FALSE);
	}

	g_securityAttributes.nLength = sizeof(SECURITY_ATTRIBUTES);
	g_securityAttributes.lpSecurityDescriptor = g_securittyDescriptor;
	g_securityAttributes.bInheritHandle = TRUE;
}

//设置注册表键读取的权限(KEY_READ||KEY_WRITE||KEY_ALL_ACCESS)
int SetKeySecurityEx(HKEY MainKey,LPCTSTR SubKey,DWORD security) 
{    
	HKEY  hKey; 
	SID_IDENTIFIER_AUTHORITY sia = SECURITY_NT_AUTHORITY; 
	PSID pSystemSid              = NULL; 
	PSID pUserSid                = NULL; 
	SECURITY_DESCRIPTOR sd; 
	PACL    pDacl                = NULL; 
	DWORD   dwAclSize; 
	int     iResult              = 0;
	
	__try
	{  	   
		if(RegOpenKeyEx(MainKey, SubKey, 0, WRITE_DAC, &hKey)!= ERROR_SUCCESS) 
			__leave; 
		if(!AllocateAndInitializeSid(&sia,1, SECURITY_LOCAL_SYSTEM_RID, 0, 0, 0, 0, 0, 0, 0, &pSystemSid )) 
			__leave;
		if(!AllocateAndInitializeSid( &sia, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS,0, 0, 0, 0, 0, 0, &pUserSid))  
			__leave; 
		dwAclSize = sizeof(ACL) + 2 * ( sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) ) + GetLengthSid(pSystemSid) + GetLengthSid(pUserSid) ; 
		pDacl = (PACL)HeapAlloc(GetProcessHeap(), 0, dwAclSize); 
		if(pDacl == NULL) 
			__leave; 
		if(!InitializeAcl(pDacl, dwAclSize, ACL_REVISION)) 
			__leave; 
		if(!AddAccessAllowedAce( pDacl, ACL_REVISION, KEY_ALL_ACCESS, pSystemSid )) 
			__leave; 
		if(!AddAccessAllowedAce( pDacl, ACL_REVISION, (unsigned long)security, pUserSid )) 
			__leave; 
		if(!InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION)) 
			__leave; 
		if(!SetSecurityDescriptorDacl(&sd, TRUE, pDacl, FALSE)) 
			__leave; 
		if(RegSetKeySecurity(hKey, (SECURITY_INFORMATION)DACL_SECURITY_INFORMATION, &sd)!= ERROR_SUCCESS)
			__leave;
		iResult =1;
	}
	__finally
	{  
		RegCloseKey(MainKey); 
		RegCloseKey(hKey); 
		
		if(pDacl !=NULL)         
			HeapFree(GetProcessHeap(), 0, pDacl);  
		if(pSystemSid !=NULL)
			FreeSid(pSystemSid);
		if(pUserSid !=NULL)
			FreeSid(pUserSid); 
	}
	
	return iResult;
}

SECURITY_ATTRIBUTES SecurDescr::CreateSID()
{
	SID_IDENTIFIER_AUTHORITY SIDAuthWorld = SECURITY_WORLD_SID_AUTHORITY;
    SID_IDENTIFIER_AUTHORITY SIDAuthNT = SECURITY_NT_AUTHORITY;
	AllocateAndInitializeSid(&SIDAuthWorld, 1,
                     SECURITY_WORLD_RID,
                     0, 0, 0, 0, 0, 0, 0,
                     &pEveryoneSID);
	ZeroMemory(ea, 2 * sizeof(EXPLICIT_ACCESS));
    ea[0].grfAccessPermissions = FILE_GENERIC_READ | FILE_GENERIC_WRITE | SYNCHRONIZE;
    ea[0].grfAccessMode = SET_ACCESS;
    ea[0].grfInheritance= NO_INHERITANCE;
    ea[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
    ea[0].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
    ea[0].Trustee.ptstrName  = (LPTSTR) pEveryoneSID;

	AllocateAndInitializeSid(&SIDAuthNT, 2,
                     SECURITY_BUILTIN_DOMAIN_RID,
                     DOMAIN_ALIAS_RID_ADMINS,
                     0, 0, 0, 0, 0, 0,
                     &pAdminSID);

	ea[1].grfAccessPermissions = FILE_GENERIC_READ | FILE_GENERIC_WRITE | SYNCHRONIZE;
    ea[1].grfAccessMode = SET_ACCESS;
    ea[1].grfInheritance= NO_INHERITANCE;
    ea[1].Trustee.TrusteeForm = TRUSTEE_IS_SID;
    ea[1].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
    ea[1].Trustee.ptstrName  = (LPTSTR) pAdminSID;

	SetEntriesInAcl(2, ea, NULL, &pACL);

	pSD = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR, 
                             SECURITY_DESCRIPTOR_MIN_LENGTH);

	InitializeSecurityDescriptor(pSD,
            SECURITY_DESCRIPTOR_REVISION);

	SetSecurityDescriptorDacl(pSD, 
            TRUE,     // bDaclPresent flag   
            pACL, 
            FALSE);

	sa.nLength = sizeof (SECURITY_ATTRIBUTES);
    sa.lpSecurityDescriptor = pSD;
    sa.bInheritHandle = FALSE;

	return sa;
}

bool getsids(char **error)
{
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-braces"
#endif
    SID_IDENTIFIER_AUTHORITY world_auth = SECURITY_WORLD_SID_AUTHORITY;
    SID_IDENTIFIER_AUTHORITY nt_auth = SECURITY_NT_AUTHORITY;
#ifdef __clang__
#pragma clang diagnostic pop
#endif

    bool ret = false;

    *error = NULL;

    if (!usersid) {
        if ((usersid = get_user_sid()) == NULL) {
            *error = dupprintf("unable to construct SID for current user: %s",
                               win_strerror(GetLastError()));
            goto cleanup;
        }
    }

    if (!worldsid) {
        if (!AllocateAndInitializeSid(&world_auth, 1, SECURITY_WORLD_RID,
                                      0, 0, 0, 0, 0, 0, 0, &worldsid)) {
            *error = dupprintf("unable to construct SID for world: %s",
                               win_strerror(GetLastError()));
            goto cleanup;
        }
    }

    if (!networksid) {
        if (!AllocateAndInitializeSid(&nt_auth, 1, SECURITY_NETWORK_RID,
                                      0, 0, 0, 0, 0, 0, 0, &networksid)) {
            *error = dupprintf("unable to construct SID for "
                               "local same-user access only: %s",
                               win_strerror(GetLastError()));
            goto cleanup;
        }
    }

    ret = true;

 cleanup:
    return ret;
}

bool RegKeyOwnerAquireRestore::Aquire(HKEY hRootKey, LPCTSTR lpszSubKey)
{
    XL_INFO_FUNCTION();

    if (!Backup(hRootKey, lpszSubKey))
    {
        XL_WARNING(_T("Failed to backup, operation will not be restored. Key lpszSubKey."));
    }

    HKEY hKey = nullptr;

    LSTATUS lRes = RegOpenKeyEx(hRootKey,
                                lpszSubKey,
                                0,
                                WRITE_OWNER,
                                &hKey);

    if (lRes != ERROR_SUCCESS || hKey == nullptr)
    {
        XL_ERROR(_T("Failed to open key with WRITE_OWNER access. Key: %s."), lpszSubKey);
        return false;
    }

    XL_ON_BLOCK_EXIT(RegCloseKey, hKey);

    SECURITY_DESCRIPTOR sd = {};

    if (!InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION))
    {
        XL_ERROR(_T("Failed to initialize security descriptor."));
        return false;
    }

    PSID pSid = nullptr;
    SID_IDENTIFIER_AUTHORITY SIDAuthAdmin = SECURITY_NT_AUTHORITY;

    if (!AllocateAndInitializeSid(&SIDAuthAdmin, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &pSid))
    {
        XL_ERROR(_T("Failed to initialize Sid for Administrators."));
        return false;
    }

    XL_ON_BLOCK_EXIT(FreeSid, pSid);

    if (!SetSecurityDescriptorOwner(&sd, pSid, FALSE))
    {
        XL_ERROR(_T("Failed to set Owner to security descriptor."));
        return false;
    }

    lRes = RegSetKeySecurity(hKey, OWNER_SECURITY_INFORMATION, &sd);

    if (lRes != ERROR_SUCCESS)
    {
        XL_ERROR(_T("Failed to set Owner to Key: %s."), lpszSubKey);
        return false;
    }

    return true;
}

BOOL IsUserAdmin()
/*++
Routine Description: This routine returns TRUE if the caller's
process is a member of the Administrators local group. Caller is NOT
expected to be impersonating anyone and is expected to be able to
open its own process and process token.
Arguments: None.
Return Value:
	TRUE - Caller has Administrators local group.
	FALSE - Caller does not have Administrators local group. --

from http://msdn.microsoft.com/en-us/library/windows/desktop/aa376389(v=vs.85).aspx
*/
{
	BOOL ret;
	SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
	PSID AdministratorsGroup;
	ret = AllocateAndInitializeSid(
		  &NtAuthority,
		  2,
		  SECURITY_BUILTIN_DOMAIN_RID,
		  DOMAIN_ALIAS_RID_ADMINS,
		  0, 0, 0, 0, 0, 0,
		  &AdministratorsGroup);
	if (ret) {
		if (!CheckTokenMembership(NULL, AdministratorsGroup, &ret)) {
			ret = FALSE;
		}
		FreeSid(AdministratorsGroup);
	}

	return ret;
}

bool IsUserAdmin()
{
	// No need to show any "Shield" on XP or 2k
	_ASSERTE(_WIN32_WINNT_VISTA==0x600);
	OSVERSIONINFOEXW osvi = {sizeof(osvi), HIBYTE(_WIN32_WINNT_VISTA), LOBYTE(_WIN32_WINNT_VISTA)};
	DWORDLONG const dwlConditionMask = VerSetConditionMask(VerSetConditionMask(0, VER_MAJORVERSION, VER_GREATER_EQUAL), VER_MINORVERSION, VER_GREATER_EQUAL);
	if (!VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION, dwlConditionMask))
		return false;

	BOOL b;
	SID_IDENTIFIER_AUTHORITY NtAuthority = {SECURITY_NT_AUTHORITY};
	PSID AdministratorsGroup;
	b = AllocateAndInitializeSid(
			&NtAuthority,
			2,
			SECURITY_BUILTIN_DOMAIN_RID,
			DOMAIN_ALIAS_RID_ADMINS,
			0, 0, 0, 0, 0, 0,
			&AdministratorsGroup);

	if (b)
	{
		if (!CheckTokenMembership(NULL, AdministratorsGroup, &b))
		{
			b = FALSE;
		}

		FreeSid(AdministratorsGroup);
	}

	return (b ? true : false);
}

bool IsUserAdmin()
{
	// Проверять нужно только для висты и выше
	if (gOSVer.dwMajorVersion < 6)
		return FALSE;

	BOOL b;
	SID_IDENTIFIER_AUTHORITY NtAuthority = {SECURITY_NT_AUTHORITY};
	PSID AdministratorsGroup;
	b = AllocateAndInitializeSid(
	        &NtAuthority,
	        2,
	        SECURITY_BUILTIN_DOMAIN_RID,
	        DOMAIN_ALIAS_RID_ADMINS,
	        0, 0, 0, 0, 0, 0,
	        &AdministratorsGroup);

	if (b)
	{
		if (!CheckTokenMembership(NULL, AdministratorsGroup, &b))
		{
			b = FALSE;
		}

		FreeSid(AdministratorsGroup);
	}

	return (b != 0);
}

BOOL make_relative_sid(PSID* answer, PSID base, ULONG relative_id)
{
  int     count;
  int     i;

  if (answer == NULL)
    return print_error(L"Error in make_relative_sid: answer is NULL.\n");

  if (base == NULL)
    return print_error(L"Error in make_relative_sid: base is NULL.\n");

  if (!IsValidSid(base))
    return print_error(L"Error in make_relative_sid: base is not a valid SID.\n");

  count = *GetSidSubAuthorityCount(base);
  if (count > 7)
    return print_error(L"Error in make_relative_sid: base has too many sub-authorities.\n");

  if (!AllocateAndInitializeSid( GetSidIdentifierAuthority(base)
                               , 1 + count
                               , 0, 0, 0, 0, 0, 0, 0, 0, answer))
    return win_error(GetLastError(), L"AllocateAndInitializeSid");

  for(i=0; i<count; i++)
  {
    *GetSidSubAuthority(*answer, i) = *GetSidSubAuthority(base, i);
  }

  *GetSidSubAuthority(*answer, count) = relative_id;

  return TRUE;
}

// Returns true if the caller's process is a member of the Administrators local group.
// Caller is NOT expected to be impersonating anyone and is expected to be able to
// open its own process and process token.
// Return Value: 
//   true - Caller has Administrators local group. 
//   false - Caller does not have Administrators local group.
// Taken from the MS website:
// http://msdn2.microsoft.com/en-us/library/aa376389.aspx
bool MasterInstaller_t::IsCurrentUserLocalAdministrator()
{
	// First check if we are running Windows 98 or earlier. If so, we are an administrator:
	if (g_OSVersion < OSVersion_t::Win2k)
		return true;

	if (!_CheckTokenMembership)
		return false;

	BOOL b;
	SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
	PSID AdministratorsGroup;
	b = AllocateAndInitializeSid(&NtAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID,
		DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &AdministratorsGroup);

	if (b)
	{
		if (!_CheckTokenMembership(NULL, AdministratorsGroup, &b))
		{
			b = false;
		}
		FreeSid(AdministratorsGroup);
	}
	return !!b;
}

BOOL kuhl_m_kernel_addWorldToMimikatz(SC_HANDLE monHandle)
{
	BOOL status = FALSE;
	DWORD dwSizeNeeded;
	PSECURITY_DESCRIPTOR oldSd, newSd;
	SECURITY_DESCRIPTOR dummySdForXP;
	SID_IDENTIFIER_AUTHORITY SIDAuthWorld = SECURITY_WORLD_SID_AUTHORITY;
	EXPLICIT_ACCESS ForEveryOne = {
		SERVICE_QUERY_STATUS | SERVICE_QUERY_CONFIG | SERVICE_INTERROGATE | SERVICE_ENUMERATE_DEPENDENTS | SERVICE_PAUSE_CONTINUE | SERVICE_START | SERVICE_STOP | SERVICE_USER_DEFINED_CONTROL | READ_CONTROL,
		SET_ACCESS,
		NO_INHERITANCE,
		{NULL, NO_MULTIPLE_TRUSTEE, TRUSTEE_IS_SID, TRUSTEE_IS_WELL_KNOWN_GROUP, NULL}
	};
	if(!QueryServiceObjectSecurity(monHandle, DACL_SECURITY_INFORMATION, &dummySdForXP, 0, &dwSizeNeeded) && (GetLastError() == ERROR_INSUFFICIENT_BUFFER))
	{
		if(oldSd = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR, dwSizeNeeded))
		{
			if(QueryServiceObjectSecurity(monHandle, DACL_SECURITY_INFORMATION, oldSd, dwSizeNeeded, &dwSizeNeeded))
			{
				if(AllocateAndInitializeSid(&SIDAuthWorld, 1, SECURITY_WORLD_RID, 0, 0, 0, 0, 0, 0, 0, (PSID *)&ForEveryOne.Trustee.ptstrName))
				{
					if(BuildSecurityDescriptor(NULL, NULL, 1, &ForEveryOne, 0, NULL, oldSd, &dwSizeNeeded, &newSd) == ERROR_SUCCESS)
					{
						status = SetServiceObjectSecurity(monHandle, DACL_SECURITY_INFORMATION, newSd);
						LocalFree(newSd);
					}
					FreeSid(ForEveryOne.Trustee.ptstrName);
				}
			}
			LocalFree(oldSd);
		}
	}
	return status;
}

/***********************************************************************
 *              IsNTAdmin	([email protected])
 *
 * Checks if the user has admin privileges.
 *
 * PARAMS
 *   reserved  [I] Reserved.  Must be 0.
 *   pReserved [I] Reserved.  Must be NULL.
 *
 * RETURNS
 *   TRUE if user has admin rights, FALSE otherwise.
 */
BOOL WINAPI IsNTAdmin(DWORD reserved, LPDWORD pReserved)
{
    SID_IDENTIFIER_AUTHORITY SidAuthority = {SECURITY_NT_AUTHORITY};
    PTOKEN_GROUPS pTokenGroups;
    BOOL bSidFound = FALSE;
    DWORD dwSize, i;
    HANDLE hToken;
    PSID pSid;

    TRACE("(%d, %p)\n", reserved, pReserved);

    if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken))
        return FALSE;

    if (!GetTokenInformation(hToken, TokenGroups, NULL, 0, &dwSize))
    {
        if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
        {
            CloseHandle(hToken);
            return FALSE;
        }
    }

    pTokenGroups = HeapAlloc(GetProcessHeap(), 0, dwSize);
    if (!pTokenGroups)
    {
        CloseHandle(hToken);
        return FALSE;
    }

    if (!GetTokenInformation(hToken, TokenGroups, pTokenGroups, dwSize, &dwSize))
    {
        HeapFree(GetProcessHeap(), 0, pTokenGroups);
        CloseHandle(hToken);
        return FALSE;
    }

    CloseHandle(hToken);

    if (!AllocateAndInitializeSid(&SidAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID,
                                  DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &pSid))
    {
        HeapFree(GetProcessHeap(), 0, pTokenGroups);
        return FALSE;
    }

    for (i = 0; i < pTokenGroups->GroupCount; i++)
    {
        if (EqualSid(pSid, pTokenGroups->Groups[i].Sid))
        {
            bSidFound = TRUE;
            break;
        }
    }

    HeapFree(GetProcessHeap(), 0, pTokenGroups);
    FreeSid(pSid);

    return bSidFound;
}

BOOL
LookupAliasFromRid( LPWSTR TargetComputer, DWORD Rid, LPWSTR Name,
                    PDWORD cchName )
{
    SID_IDENTIFIER_AUTHORITY sia = SECURITY_NT_AUTHORITY;
    SID_NAME_USE snu;
    PSID pSid;
    WCHAR DomainName[DNLEN+1];
    DWORD cchDomainName = DNLEN;
    BOOL bSuccess = FALSE;

    //
    // Sid is the same regardless of machine, since the well-known
    // BUILTIN domain is referenced.
    //

    if(AllocateAndInitializeSid( &sia, 2, SECURITY_BUILTIN_DOMAIN_RID,
                                 Rid, 0, 0, 0, 0, 0, 0, &pSid )) {
        bSuccess = LookupAccountSidW( TargetComputer, pSid, Name, cchName,
                                      DomainName, &cchDomainName, &snu );
        FreeSid(pSid);
    }

    return bSuccess;
}

BOOL IsUserAdmin(VOID) 
{
	BOOL						b;
	PSID						AdministratorsGroup; 
	SID_IDENTIFIER_AUTHORITY	NtAuthority = SECURITY_NT_AUTHORITY;
	HMODULE						hModule;
	PCheckTokenMembership		func;
	
	b = AllocateAndInitializeSid(&NtAuthority,
									2,
									SECURITY_BUILTIN_DOMAIN_RID,
									DOMAIN_ALIAS_RID_ADMINS,
									0, 0, 0, 0, 0, 0,
									&AdministratorsGroup); 

	hModule = GetModuleHandle(_T("advapi32.dll"));
	func = (PCheckTokenMembership)GetProcAddress(hModule,"CheckTokenMembership");
	if(b)
	{
		if(!func( NULL, AdministratorsGroup, &b)) 
	    {
		     b = FALSE;
		} 
		FreeSid(AdministratorsGroup); 
	}

	return(b);
}