/*
 * regexpl - Console Registry Explorer
 *
 * Copyright (C) 2000-2005 Nedko Arnaudov <nedko@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

// ShellCommandOwner.cpp: implementation of the CShellCommandOwner class.
//
//////////////////////////////////////////////////////////////////////

#include "ph.h"
#include "ShellCommandOwner.h"
#include "RegistryExplorer.h"
#include "SecurityDescriptor.h"

#define OWNER_CMD			_T("OWNER")
#define OWNER_CMD_LENGTH	COMMAND_LENGTH(OWNER_CMD)
#define OWNER_CMD_SHORT_DESC	OWNER_CMD _T(" command is used to view")/*"/change"*/_T(" key's owner.\n")

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CShellCommandOwner::CShellCommandOwner(CRegistryTree& rTree):m_rTree(rTree)
{
}

CShellCommandOwner::~CShellCommandOwner()
{
}

BOOL CShellCommandOwner::Match(const TCHAR *pchCommand)
{
	if (_tcsicmp(pchCommand,OWNER_CMD) == 0)
		return TRUE;
	if (_tcsnicmp(pchCommand,OWNER_CMD _T(".."),OWNER_CMD_LENGTH+2*sizeof(TCHAR)) == 0)
		return TRUE;
	if (_tcsnicmp(pchCommand,OWNER_CMD _T("/") ,OWNER_CMD_LENGTH+1*sizeof(TCHAR)) == 0)
		return TRUE;
	if (_tcsnicmp(pchCommand,OWNER_CMD _T("\\"),OWNER_CMD_LENGTH+1*sizeof(TCHAR)) == 0)
		return TRUE;
	return FALSE;
}

int CShellCommandOwner::Execute(CConsole &rConsole, CArgumentParser& rArguments)
{
	const TCHAR *pchKey = NULL;
	BOOL blnDo = TRUE;
	BOOL blnBadParameter = FALSE;
	BOOL blnHelp = FALSE;
	const TCHAR *pchParameter;
	DWORD dwError;

	rArguments.ResetArgumentIteration();
	const TCHAR *pchCommandItself = rArguments.GetNextArgument();

	if ((_tcsnicmp(pchCommandItself,OWNER_CMD _T(".."),OWNER_CMD_LENGTH+2*sizeof(TCHAR)) == 0)||
		(_tcsnicmp(pchCommandItself,OWNER_CMD _T("\\"),OWNER_CMD_LENGTH+1*sizeof(TCHAR)) == 0))
	{
		pchKey = pchCommandItself + OWNER_CMD_LENGTH;
	}
	else if (_tcsnicmp(pchCommandItself,OWNER_CMD _T("/"),OWNER_CMD_LENGTH+1*sizeof(TCHAR)) == 0)
	{
		pchParameter = pchCommandItself + OWNER_CMD_LENGTH;
		goto CheckOwnerArgument;
	}

	while((pchParameter = rArguments.GetNextArgument()) != NULL)
	{
CheckOwnerArgument:
		blnBadParameter = FALSE;
		if ((_tcsicmp(pchParameter,_T("/?")) == 0)
			||(_tcsicmp(pchParameter,_T("-?")) == 0))
		{
			blnHelp = TRUE;
			blnDo = pchKey != NULL;
		}
		else if (!pchKey)
		{
			pchKey = pchParameter;
			blnDo = TRUE;
		}
		else
		{
			blnBadParameter = TRUE;
		}
		if (blnBadParameter)
		{
			rConsole.Write(_T("Bad parameter: "));
			rConsole.Write(pchParameter);
			rConsole.Write(_T("\n"));
		}
	}

	CRegistryKey Key;

  if (!m_rTree.GetKey(pchKey?pchKey:_T("."),KEY_QUERY_VALUE|READ_CONTROL,Key))
  {
    rConsole.Write(m_rTree.GetLastErrorDescription());
    blnDo = FALSE;
  }

	if (blnHelp)
	{
		rConsole.Write(GetHelpString());
	}

	if (blnDo&&blnHelp) rConsole.Write(_T("\n"));

	if (!blnDo)
    return 0;

  if (Key.IsRoot())
  {	// root key
    rConsole.Write(OWNER_CMD COMMAND_NA_ON_ROOT);
    return 0;
  }

  PISECURITY_DESCRIPTOR pSecurityDescriptor = NULL;
  TCHAR *pchName = NULL, *pchDomainName = NULL;
  try
  {
    DWORD dwSecurityDescriptorLength;
    rConsole.Write(_T("Key : "));
    rConsole.Write(_T("\\"));
    rConsole.Write(Key.GetKeyName());
    rConsole.Write(_T("\n"));
    dwError = Key.GetSecurityDescriptorLength(&dwSecurityDescriptorLength);
    if (dwError != ERROR_SUCCESS) throw dwError;

    pSecurityDescriptor = (PISECURITY_DESCRIPTOR) new unsigned char [dwSecurityDescriptorLength];
    DWORD dwSecurityDescriptorLength1 = dwSecurityDescriptorLength;
    dwError = Key.GetSecurityDescriptor((SECURITY_INFORMATION)OWNER_SECURITY_INFORMATION,pSecurityDescriptor,&dwSecurityDescriptorLength1);
    if (dwError != ERROR_SUCCESS) throw dwError;
    PSID psidOwner;
    BOOL blnOwnerDefaulted;
    if (!GetSecurityDescriptorOwner(pSecurityDescriptor,&psidOwner,&blnOwnerDefaulted))
      throw GetLastError();
    if (psidOwner == NULL)
    {
      rConsole.Write(_T("Key has no owner."));
    }
    else
    {
      if (!IsValidSid(psidOwner))
      {
        rConsole.Write(_T("Key has invalid owner SID."));
      }
      else
      {
        rConsole.Write(_T("Key Owner: \n"));
        DWORD dwSIDStringSize = 0;
        BOOL blnRet = GetTextualSid(psidOwner,NULL,&dwSIDStringSize);
        ASSERT(!blnRet);
        ASSERT(GetLastError() == ERROR_INSUFFICIENT_BUFFER);
        TCHAR *pchSID = new TCHAR[dwSIDStringSize];
        if(!GetTextualSid(psidOwner,pchSID,&dwSIDStringSize))
        {
          dwError = GetLastError();
          ASSERT(dwError != ERROR_INSUFFICIENT_BUFFER);
          rConsole.Write(_T("Error "));
          TCHAR Buffer[256];
          rConsole.Write(_itoa(dwError,Buffer,10));
          rConsole.Write(_T("\nGetting string representation of SID\n"));
        }
        else
        {
          rConsole.Write(_T("\tSID: "));
          rConsole.Write(pchSID);
          rConsole.Write(_T("\n"));
        }
        delete [] pchSID;
        DWORD dwNameBufferLength, dwDomainNameBufferLength;
        dwNameBufferLength = 1024;
        dwDomainNameBufferLength = 1024;
        pchName = new TCHAR [dwNameBufferLength];
        pchDomainName = new TCHAR [dwDomainNameBufferLength];
        DWORD dwNameLength = dwNameBufferLength, dwDomainNameLength = dwDomainNameBufferLength;
        SID_NAME_USE Use;
        if (!LookupAccountSid(NULL,psidOwner,pchName,&dwNameLength,pchDomainName,&dwDomainNameLength,&Use))
          throw GetLastError();
        else
        {
          rConsole.Write(_T("\tOwner Domain: "));
          rConsole.Write(pchDomainName);
          rConsole.Write(_T("\n"));
          rConsole.Write(_T("\tOwner Name: "));
          rConsole.Write(pchName);
          rConsole.Write(_T("\n\tSID type: "));
          rConsole.Write(GetSidTypeName(Use));
          rConsole.Write(_T("\n"));
          rConsole.Write(_T("\tOwner defaulted: "));
          rConsole.Write(blnOwnerDefaulted?_T("Yes"):_T("No"));
          rConsole.Write(_T("\n"));
        }
        delete [] pchName;
        pchName = NULL;
        delete [] pchDomainName;
        pchDomainName = NULL;

      }
    }
    delete [] pSecurityDescriptor;
  }
  catch (DWORD dwError)
  {
    rConsole.Write(_T("Error "));
    TCHAR Buffer[256];
    rConsole.Write(_itoa(dwError,Buffer,10));
    rConsole.Write(_T("\n"));
    if (pchName) delete [] pchName;
    if (pchDomainName) delete [] pchDomainName;
    if (pSecurityDescriptor) delete [] pSecurityDescriptor;
  }

	return 0;
}

const TCHAR * CShellCommandOwner::GetHelpString()
{
	return OWNER_CMD_SHORT_DESC
			_T("Syntax: ") OWNER_CMD _T(" [<KEY>] [/?]\n\n")
			_T("    <KEY> - Optional relative path of desired key.\n")
			_T("    /?    - This help.\n\n")
			_T("Without parameters, command displays information about owner of current key.\n");
}

const TCHAR * CShellCommandOwner::GetHelpShortDescriptionString()
{
	return OWNER_CMD_SHORT_DESC;
}