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//+------------------------------------------------------------------
//
// Copyright (C) 1995, Microsoft Corporation.
//
// File: DumpSec.cxx
//
// Contents: class to dump file security ACL
//
// Classes: CDumpSecurity
//
// History: Nov-93 DaveMont Created.
//
//-------------------------------------------------------------------
#include <DumpSec.hxx>
//+---------------------------------------------------------------------------
//
// Member: CDumpSecurity::CDumpSecurity, public
//
// Synopsis: initialized data members, constructor will not throw
//
// Arguments: IN [pfilename] - name of file to dump security for
//
//----------------------------------------------------------------------------
CDumpSecurity::CDumpSecurity(WCHAR *pfilename)
: _psd(NULL),
_pwfilename(pfilename),
_pdacl(NULL),
_pah(NULL),
_psid(NULL),
_cacethissid(0)
{
}
//+---------------------------------------------------------------------------
//
// Member: CDumpSecurity::Init, public
//
// Synopsis: Init must be called before any other methods - this
// is not enforced. Init gets the security descriptor and
// ACL for the file
//
// Arguments: none
//
//----------------------------------------------------------------------------
ULONG CDumpSecurity::Init()
{
ULONG ret;
ULONG cpsd;
// get the size of the security buffer
if (!GetFileSecurity(_pwfilename,
DACL_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION |
OWNER_SECURITY_INFORMATION,
NULL,
0,
&cpsd) )
{
if (ERROR_INSUFFICIENT_BUFFER == (ret = GetLastError()))
{
if ( NULL == ( _psd = (BYTE *)LocalAlloc(LMEM_FIXED, cpsd)))
{
return(ERROR_NOT_ENOUGH_MEMORY);
}
// actually get the buffer this time
if ( GetFileSecurity(_pwfilename,
DACL_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION |
OWNER_SECURITY_INFORMATION,
_psd,
cpsd,
&cpsd) )
{
BOOL fdaclpresent;
BOOL cod;
// get the ACL
if ( GetSecurityDescriptorDacl(_psd,
&fdaclpresent,
&_pdacl,
&cod) )
{
if (!fdaclpresent)
{
_pdacl = NULL;
return(ERROR_NO_SECURITY_ON_OBJECT);
}
// save the ACL location
_pah = (ACE_HEADER *)Add2Ptr(_pdacl, sizeof(ACL));
return(ERROR_SUCCESS);
} else
return(GetLastError());
} else
return(GetLastError());
}
} else
return(ERROR_NO_SECURITY_ON_OBJECT);
return(ret);
}
//+---------------------------------------------------------------------------
//
// Member: Dtor, public
//
// Synopsis: frees the security descriptor
//
// Arguments: none
//
//----------------------------------------------------------------------------
CDumpSecurity::~CDumpSecurity()
{
if (_psd)
{
LocalFree(_psd);
}
}
//+---------------------------------------------------------------------------
//
// Member: CDumpSecurity::GetSDOwner, public
//
// Synopsis: returns the owner of the file
//
// Arguments: OUT [psid] - address of the returned sid
//
//----------------------------------------------------------------------------
ULONG CDumpSecurity::GetSDOwner(SID **psid)
{
BOOL cod;
if ( GetSecurityDescriptorOwner(_psd, (void **)psid, &cod) )
return(0);
else
return(GetLastError());
}
//+---------------------------------------------------------------------------
//
// Member: CDumpSecurity::GetSDGroup, public
//
// Synopsis: returns the group from the file
//
// Arguments: OUT [pgsid] - address of the returned group sid
//
//----------------------------------------------------------------------------
ULONG CDumpSecurity::GetSDGroup(SID **pgsid)
{
BOOL cod;
if ( GetSecurityDescriptorGroup(_psd, (void **)pgsid, &cod) )
return(0);
else
return(GetLastError());
}
//+---------------------------------------------------------------------------
//
// Member: CDumpSecurity::ResetAce, public
//
// Synopsis: sets the 'ace' index to the start of the DACL
//
// Arguments: IN - [psid] - the SID to find aces for
//
//----------------------------------------------------------------------------
VOID CDumpSecurity::ResetAce(SID *psid)
{
_psid = psid;
_cacethissid = 0;
if (_pdacl)
_pah = (ACE_HEADER *)Add2Ptr(_pdacl, sizeof(ACL));
}
//+---------------------------------------------------------------------------
//
// Member: CDumpSecurity::GetNextAce, public
//
// Synopsis: gets the next ACE from the DACL for the specified SID
//
// Arguments: OUT [pace] - pointer to the next ace for the SID passed
// in at the last reset.
//
// Returns: the number of the ACE
//
//----------------------------------------------------------------------------
LONG CDumpSecurity::GetNextAce(ACE_HEADER **paceh)
{
LONG ret = -1;
if (_pdacl)
{
for (;_cacethissid < _pdacl->AceCount;
_cacethissid++, _pah = (ACE_HEADER *)Add2Ptr(_pah, _pah->AceSize))
{
if (!_psid || EqualSid(_psid,(SID *)&((ACCESS_ALLOWED_ACE *)_pah)->SidStart) )
{
*paceh = _pah;
ret = _cacethissid++;
_pah = (ACE_HEADER *)Add2Ptr(_pah, _pah->AceSize);
break;
}
}
}
return(ret);
}
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