// regsec.cpp
//***************************************************************
// From the book "Win32 System Services: The Heart of Windows 98
// and Windows 2000"
// by Marshall Brain
// Published by Prentice Hall
//
// Copyright 1995, by Prentice Hall.
//
// This code creates a registry key that only the account
// "Guest" can access.
//***************************************************************
#include <windows.h>
#include <iostream.h>

SECURITY_ATTRIBUTES sa;
SECURITY_DESCRIPTOR sd;
BYTE                aclBuffer[1024];
PACL                pacl=(PACL)&aclBuffer;
BYTE                sidBuffer[100];
PSID                psid=(PSID) &sidBuffer;
DWORD               sidBufferSize = 100;
char                domainBuffer[80];
DWORD               domainBufferSize = 80;
SID_NAME_USE        snu;
LONG                result;
HKEY                regKey;
DWORD               disposition;

void main(void)
{
  InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION);

  InitializeAcl(pacl, 1024, ACL_REVISION);

  LookupAccountName(0, "guest", psid, &sidBufferSize, domainBuffer, &domainBufferSize, &snu);

  AddAccessAllowedAce(pacl, ACL_REVISION, GENERIC_READ, psid);
  
  SetSecurityDescriptorDacl(&sd, TRUE, pacl,  FALSE);

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

  result = RegCreateKeyEx(HKEY_CURRENT_USER, "junk", 0, 0, REG_OPTION_VOLATILE, KEY_ALL_ACCESS, &sa, &regKey, &disposition);
  
  cout << result << endl;
  RegCloseKey(regKey);
}