base/applications/sc/sdshow.c

   1 /*
   2  * PROJECT:     ReactOS Services
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        base/applications/sc/sdshow.c
   5  * PURPOSE:     Show a service security descriptor
   6  * COPYRIGHT:   Copyright 2016 Eric Kohl
   7  *
   8  */
   9
  10 #include "sc.h"
  11
  12 BOOL SdShow(LPCTSTR ServiceName)
  13 {
  14     SC_HANDLE hManager = NULL;
  15     SC_HANDLE hService = NULL;
  16     BOOL bResult = TRUE;
  17     DWORD cbBytesNeeded = 0;
  18     PSECURITY_DESCRIPTOR pSecurityDescriptor = NULL;
  19     LPTSTR pStringBuffer = NULL;
  20
  21 #ifdef SCDBG
  22     _tprintf(_T("service to show sd - %s\n\n"), ServiceName);
  23 #endif
  24
  25     hManager = OpenSCManager(NULL,
  26                              NULL,
  27                              SC_MANAGER_CONNECT);
  28     if (hManager == NULL)
  29     {
  30         _tprintf(_T("[SC] OpenSCManager FAILED %lu:\n\n"), GetLastError());
  31         bResult = FALSE;
  32         goto done;
  33     }
  34
  35     hService = OpenService(hManager, ServiceName, READ_CONTROL);
  36     if (hService == NULL)
  37     {
  38         _tprintf(_T("[SC] OpenService FAILED %lu:\n\n"), GetLastError());
  39         bResult = FALSE;
  40         goto done;
  41     }
  42
  43     if (!QueryServiceObjectSecurity(hService,
  44                                     DACL_SECURITY_INFORMATION,
  45                                     (PSECURITY_DESCRIPTOR)&pSecurityDescriptor,
  46                                     sizeof(PSECURITY_DESCRIPTOR),
  47                                     &cbBytesNeeded))
  48     {
  49         if (cbBytesNeeded == 0)
  50         {
  51             _tprintf(_T("[SC] QueryServiceObjectSecurity FAILED %lu:\n\n"), GetLastError());
  52             bResult = FALSE;
  53             goto done;
  54         }
  55     }
  56
  57     pSecurityDescriptor = HeapAlloc(GetProcessHeap(), 0, cbBytesNeeded);
  58     if (pSecurityDescriptor == NULL)
  59     {
  60         SetLastError(ERROR_OUTOFMEMORY);
  61         _tprintf(_T("[SC] HeapAlloc FAILED %lu:\n\n"), GetLastError());
  62         bResult = FALSE;
  63         goto done;
  64     }
  65
  66     if (!QueryServiceObjectSecurity(hService,
  67                                     DACL_SECURITY_INFORMATION,
  68                                     pSecurityDescriptor,
  69                                     cbBytesNeeded,
  70                                     &cbBytesNeeded))
  71     {
  72         _tprintf(_T("[SC] QueryServiceObjectSecurity FAILED %lu:\n\n"), GetLastError());
  73         bResult = FALSE;
  74         goto done;
  75     }
  76
  77     if (!ConvertSecurityDescriptorToStringSecurityDescriptor(pSecurityDescriptor,
  78                                                              SDDL_REVISION_1,
  79                                                              DACL_SECURITY_INFORMATION,
  80                                                              &pStringBuffer,
  81                                                              NULL))
  82     {
  83         _tprintf(_T("[SC] ConvertSecurityDescriptorToStringSecurityDescriptor FAILED %lu:\n\n"), GetLastError());
  84         bResult = FALSE;
  85         goto done;
  86     }
  87
  88     _tprintf(_T("\n%s\n"), pStringBuffer);
  89
  90 done:
  91     if (bResult == FALSE)
  92         ReportLastError();
  93
  94     if (pStringBuffer != NULL)
  95         LocalFree(pStringBuffer);
  96
  97     if (pSecurityDescriptor != NULL)
  98         HeapFree(GetProcessHeap(), 0, pSecurityDescriptor);
  99
 100     if (hService)
 101         CloseServiceHandle(hService);
 102
 103     if (hManager)
 104         CloseServiceHandle(hManager);
 105
 106     return bResult;
 107 }